Nichtwässrige Batterie

Verfahren zur Herstellung einer Lithium-Ionen-Zelle

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Lithium-Ionen-Zelle, bei dem die elektrochemisch aktive Beschichtung einer Elektrode vor einem Wickel- oder Schneidevorgang mit einem Elektrolyten oder einer Hilfsflüssigkeit kontaktiert wird. Dieses Verfahren eignet sich insbesondere die kontinuierliche Herstellung von Lithium-Ionen-Zellen mit in hoher Geschwindigkeit ablaufenden Prozessen wie zum Beispiel Wickelverfahren.

Batterie

Batterie, Folgendes umfassend:einen Elektrodenkörper (20), der eine positive Elektrode und eine negative Elektrode umfasst, wobei der Elektrodenkörper (20) in einer flachen Form hergestellt ist; undein Batteriegehäuse (30), in dem der Elektrodenkörper (20) aufgenommen ist, wobei:das Batteriegehäuse (30) einen Batteriegehäuse-Hauptkörper (32) umfasst, der eine Öffnung, durch die der Elektrodenkörper (20) aufgenommen wird, und eine Abdeckung (34), welche die Öffnung des Batteriegehäuse-Hauptkörpers (32) verschließt, aufweist;der Batteriegehäuse-Hauptkörper (32) ein Paar breite Flächen (37), die flachen Flächen des Elektrodenkörpers (20), der in dem Batteriegehäuse (30) aufgenommen ist, gegenüber liegen, ein Paar schmale Flächen (38) neben den breiten Flächen (37) und eine Bodenfläche (39) umfasst;ein Plus-Elektroden-Außenanschluss (42) und ein Minus-Elektroden-Außenanschluss (44) an einer Außenfläche der Abdeckung (34) angeordnet sind, wobei sich die Außenfläche außerhalb des Batteriegehäuses ...

Akkumulator mit spiralig aufgerollten Streifenelektroden

Enclosed layered stack, eg for batteries, consists of intermediate layers which are sepd from each other, with a wound strip between them.

The invention relates to an enclosed layered stack and to a method for producing said enclosed layered stack from a strip material (1) and several intermediate layers (2). Said method comprises the following steps: a) the strip material (1) is wounded onto a mandrel (3) in order to produce a multilayered winding, the intermediate layers (2) being bent about at most 180 DEG during the winding process and arranged on top of each other, between the winding layers (4); b) the layered stack is clamped into a housing (6) in such a way that the intermediate layers (2) are pressed together without buckling. The invention also relates to the use of this method for producing batteries, accumulators or capacitors. The invention can be used particularly advantageously for producing electrolyte capacitors with cuboidal housings.

Nickel-metal hydride battery

A nickel-metallic hydride battery has a cylindrically rolled laminated material made of a positive electrode, a negative electrode and a separator between them. The negative electrode has an electrolytically active material on both sides of a perforated plate to hold it, serving as a collector. There is an electrolyte and a protective container around the whole lot. The perforation density in the plate is greater in the outer region than in the middle region so that the binding forces between the plate and the material are essentially equal over the whole plate, and the plate's capability to collect electricity is thus increased considerably.

ELEKTRISCHE AKKUMULATORENZELLE

Rechargeable electrochemical energy storage e.g. lithium ion battery, has phase change material arranged in housing for temperature control, where part of material absorbs heat delivered by storage during charging/discharging

The storage (1) e.g. lithium ion battery, has a housing (2) comprising an electrolyte arranged between a positive electrode (3) and a negative electrode (4). A phase change material (8) e.g. paraffin, salt hydrate and gas hydrate, is arranged in the housing for temperature control, where a part of the material absorbs the heat delivered by the storage during charging or discharging process. The material is arranged in center of a winding (9). The active material of the negative electrode comprises graphite, where the material is microencapsulated.

ELEKTROFAHRZEUGBATTERIE MIT LEITFÄHIGEM GEHÄUSE

Eine beispielhafte Batteriezelle für ein Elektrofahrzeug enthält wenigstens ein leitfähiges Gehäuse und eine Elektrodenstruktur in direktem elektrischen Kontakt mit dem wenigstens einen elektrisch leitfähigen Gehäuse. Die Elektrodenstruktur soll selektiv Leistung für ein Elektrofahrzeug bereitstellen.

STROMABNEHMER

Eine elektrochemische Zelle umfasst eine Elektrodenbaugruppe, die in einem Zellengehäuse angeordnet ist. Ein erster U-förmiger Stromabnehmer ist zwischen dem Zellengehäuse und der Elektrodenbaugruppe angeordnet und ist mit einem positiven Elektrodenabschnitt der Elektrodenbaugruppe elektrisch verbunden. Ein zweiter U-förmiger Stromabnehmer ist zwischen dem Zellengehäuse und der Elektrodenbaugruppe angeordnet und ist mit einem negativen Elektrodenabschnitt der Elektrodenbaugruppe elektrisch verbunden. Der erste und der zweite Stromabnehmer wirken zusammen, um alle Seiten der Elektrodenbaugruppe zu umgeben und die Elektrodenbaugruppe in der gewünschten Konfiguration zu halten, ohne dass eine separate Halteeinrichtung erforderlich ist.

Vorrichtung zum Speichern elektrischer Energie und Herstellungsverfahren dafür

Eine Vorrichtung zum Speichern von elektrischer Energie (1) weist auf: einen Gehäusekörper (3) mit einer Öffnung (9), wobei die Öffnung (9) an einem oberen Abschnitt des Gehäusekörpers (3) ausgebildet ist; einen Elektrodenkörper (10), der im Gehäusekörper (3) aufgenommen ist; einen Laschenabschnitt (20); und einen Stromableitungsanschluss (30). Der Laschenabschnitt (20) ragt von einem Teil des Elektrodenkörpers (10) zur Öffnung (9) des Gehäusekörpers (3) vor. Der Laschenabschnitt (20) weist eine Seitenfläche (22, 27) auf, die dem Elektrodenkörper (10) nicht zugewandt ist. Der Stromableitungsanschluss (30) ist an die Seitenfläche (22, 27) des Laschenabschnitts (20) geschweißt.

Speicherbatterie und Verfahren zu deren Herstellung

Individual battery cell i.e. lithium ion cell, for use in heavy-duty battery that is utilized in electric drive of e.g. vehicle, has electrode arrangement held in housing by flexible supporting element i.e. spring element

The cell (1) has an electrode arrangement i.e. electrode coil (3), held in a round, cup-shaped housing (2) by a flexible supporting element (14) i.e. spring element. The flexible supporting element is electrically insulated against the housing and/or the electrode arrangement. The flexible supporting element is made of electrically insulating material.

Prismatische aufladbare oder primäre Zelle mit Wicklung montiert auf Spulenkörper

Batteriezelle und Verfahren zu ihrer Herstellung und Batterie

Die Erfindung betrifft in Wickelbauweise hergestellte Batteriezellen (1). Um eine erhöhte Packungsdichte in einem Zellverbund erzielen zu können, wird vorgeschlagen, den auf einen formstabilen Wickelkern (2) aufgewickelten Elektrodenwickel (3) mittels einer Formpresse in eine andere Querschnittsform umzuformen.

Akkumulator mit gekühlten Zellen und Verfahren zur Herstellung desselben

Verfahren zur Herstellung eines Akkumulators mit gekühlten Zellen beinhaltend die Verfahrensschritte Herstellen von elektrochemischen Einzelzellen, Herstellen eines Akkumulatorgehäuses mit zumindest zwei Gehäusezellen mit doppelwandiger, in axialer Ausbreitungsrichtung der Gehäusezellen verlaufender, offener Stegkammerstruktur durch Strangpressen, Extrusion oder Spritzguss, wobei die Gehäusezellen des Akkumulatorgehäuses wabenförmig angeordnet sind, und wobei die Stegkammerstruktur eine Außenwand, eine Innenwand und die Außenwand mit der Innenwand verbindende Stege sowie zwischen den Stegen angeordnete offene Bereiche aufweist, Einsetzen jeweils einer der elektrochemischen Einzelzellen in jeweils eine der Gehäusezellen des Akkumulatorgehäuses, wobei die Einzelzellen entweder vorher in einer Metallhülse ebenfalls hexagonalen Querschnitts gekapselt werden oder direkt in die Gehäusezellen eingesetzt werden, Verschließen des Akkumulatorgehäuses. Zusammenschaltung der einzelnen Akkumulatorzellen ...

Cylindrical energy storage cell for storing electricity in e.g. hybrid vehicle, has electrically non conductive spacer arranged between electrical conductors in interior of storage cell between cell cover and electrode sleeve

The storage cell has wound electrodes and two poles on a front side of the storage cell. An electrically non conductive arc-shaped spring elastic spacer is arranged between two electrical conductors in an interior of the storage cell between a cell cover and a electrode sleeve. The spacer has two recesses, where the electrical conductors are guided from the electrode sleeve to the poles spatially separated from each other.

Non-recgangular batteries for portable electronic devices

Non-prismatic electrochemical cell

Conductive structure for an electrode assembly of a lithium secondary battery

Inductive chargeable energy storage device

An inductive chargeable energy storage device 10 includes an electrically insulating casing, an energy storage unit 20 and a diode 29. The energy storage unit formed on an electrically insulating core, disposed in the casing and including a positive electrode winding or coil 21, a negative electrode winding or coil 22, and an interposing separator between the electrode windings, the positive winding, the diode and the negative winding are connected in series forming an inductive chargeable energy storage circuit. When the circuit is coupled to a primary circuit of an inductive charging platform 42, the foil conductors of the positive and negative electrode windings function as two independent secondary windings, receive electric energy inductively or wirelessly from the primary winding 43 and convert the electric energy back to DC, so that the received electric energy is stored in the electrode windings as charges, chemical energy or any combination thereof. The device is rechargeable.

Electric storage cells

A lead acid cell comprises a container 2 closed by a lid 10 and contains a single positive electrode member 4 separated from a single negative electrode member 6 by separator material. Each electrode member is of sheet form with n folds in it, with n=2 or more, thereby dividing each electrode member into n+1 electrodes which are arranged to be of alternating polarity. Each electrode member has n/2, when n is an even number, or (n+1)/2, when n is an odd number, of consecutive folds of one sense, the remaining folds being consecutive and of the opposite sense. Each electrode member has a connector member 8 situated adjacent the central fold, when n is an odd number, or adjacent the n/2th fold from one or the other end of the electrode member, when n is an even number. ...

Deferred-action electric cells or batteries and electrode assemblies therefor

... 970,691. Batteries. YARDNEY INTERNATIONAL CORPORATION. April 26, 1963 [May 2, 1962], No. 16540/63. Heading H1B. A deferred action battery (e.g. Ag/Mg with a silver chloride depolarizer) has a pair of electrodes of opposite polarity wound about a common axis and a filamentary spacer 14 wound in spaced-apart fashion about one of the electrodes 6 to allow free flow of the electrolyte between the electrodes. As shown, there are two magnesium strips 24 in parallel enveloping the silver/silver chloride electrode, the whole assembly being wound into a spiral on a wooden core.

Method of making battery using as case with aluminium multilayered films

LITHIUM SECONDARY BATTERY WITH WOUND ELECTRODE BLOCK AND PROCEDURE FOR THE PRODUCTION

HEARING AID WITH RE+RECHARGEABLE BATTERY AND RE+RECHARGEABLE BATTERY

GALVANIC ELEMENT WITH WINDING ELECTRODE SET

SECONDARY BATTERY

BATTERY MODULE

ACCUMULATOR WITH REDUCED MAGNETIC DECREASE

CONDENSER ELEMENT

PROCEDURE FOR THE PRODUCTION OF A MULTILAYERED STRUCTURE FOR THE PRODUCTION OF GENERATORS WITH A LITHIUM THIN SECTION, ELECTRO-CHEMICAL AS THIN SECTION TRAINING, AND SOLID POLYMER ELECTROLYTES.

MANUFACTURING PROCESS FOR WOUND ELECTRODES FOR BATTERIES

Constantly gas-tight closed alkaline battery

Electrical accumulator with winding electrodes

STORAGE BATTERY

Low impedance layered battery apparatus and method for making the same

High performance battery and current collector therefor

Process for forming a battery containing an iron electrode

Provided is a process for activating a battery comprising an iron electrode. The process comprises providing a battery comprising a cathode and an iron anode. The battery further comprises an electrolyte comprising NaOH, LiOH and a sulfide. The battery is then cycled to equalize the state-of-charge of the cathode and iron anode.

Low impedance folded polymeric laminate rechargeable battery and method of making

SPIRALLY WOUND ELECTROLYTIC CELL AND METHOD FOR ITS WINDING

ARCHITECTURE OF A WINDING DEVICE FOR AN ELECTRIC ENERGY STORAGE UNIT

La présente invention concerne un dispositif de réalisation d~ensemble de stockage d~énergie électrique comprenant des moyens multiples d~alimentation de structures en film, des moyens de complexage des structures en film reçues en provenance des différents moyens d~alimentation, des moyens d~enroulement du complexe obtenu et des moyens de pilotage en continu et en synchronisme contrôlé des moyens d~alimentation, des moyens de complexage et des moyens d~enroulement.

MOLTEN SALT BATTERY

Provided is a molten salt battery which can stably charge and discharge power, and does not have dead space even when a plurality of batteries are combined. A power generating element (X) is configured by interposing, between a rectangular plate-shaped positive electrode (1) and negative electrode (2), a separator (3) which is formed from a rectangular plate-shaped fiberglass cloth, and which is impregnated with molten salt. A battery container (5) roughly shaped as a cube has a nonflexible pressing plate (4b) to which the pressure from a spring (4a) disposed in the battery container (5) on the side of the negative electrode (2) is applied, which disperses the pressing force from the spring (4a) in a roughly uniform manner, and which presses the negative electrode (2) downward. Then, as a counteraction thereof, the positive electrode (1) is pressed upward by the bottom wall (52) of the battery container (5).

LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING POWER COLLECTION FOIL FOR SAME, AND POWER COLLECTION FOIL FOR SAME

Provided is a method for manufacturing a lithium secondary battery, which is capable of preventing an active material from peeling off and preventing processed metal powder of current-collecting foil from occurring in an electrode manufacturing step, said manufacturing method being provided with the electrode manufacturing step for manufacturing a positive electrode and a negative electrode, a step for forming an electrode group by stacking or rolling the positive electrode and the negative electrode with a separator interposed therebetween, and a step for immersing the electrode group in an electrolytic solution, said electrode manufacturing step being provided with a boring step for forming a plurality of through-holes each penetrating the current-collecting foil and having a protrusion protruding to at least one current-collecting foil surface side, and a mixture forming step for forming a mixture layer on the current-collecting foil, and the mixture forming step being continuously performed ...

ELECTROCHEMICAL LITHIUM ION SECONDARY CELL HAVING A SCALLOPED ELECTRODE ASSEMBLY

A lithium ion secondary battery having an irregular shape with a unitary anode and unitary cathode that are spirally wound and that provide a high energy density for an implantable biomedical device.

ELECTRICAL ENERGY STORAGE SYSTEM

L'invention concerne un système de stockage d'énergie électrique ( 100) comprenant au moins un élément bobiné de stockage d'énergie électrique placé à l'intérieur d'une enveloppe (200), ladite enveloppe (200) renfermant l'éléme nt bobiné de stockage d'énergie électrique dans un corps principal (210) de l'enveloppe (200) et comprenant au moins un couvercle (230, 240), caractéris é en ce que ledit couvercle (230, 240), disposé à une extrémité du corps principal de l'enveloppe (200) et connecté électriquement par des moyens de liaison électrique (280) à l'élément bobiné de stockage d'énergie électrique , est fixé au corps principal (210) de l'enveloppe (200) par un moyen de colla ge (600) L'invention trouve une application particulière dans la réalisation d'ensembles de stockage d'énergie électrique tels que les supercondensateurs , les batteries ou les générateurs.

ELECTROCHEMICAL STORAGE CELL WITH BLOW OUT VENTS

An electrochemical storage cell is disclosed which includes at least one cathode sheet, at least one anode sheet and at least one separator sheet combined to make a core. The core is housed within a rectangular shell with four sides and two ends, sealed with an air-tight seal. The cell further includes a blow out vent in at least one of the two ends of the shell. This blow out vent is adapted to open and release excess pressure above a predetermined level to thereby prevent catastrophic rupture of the shell.

ELECTRIC VEHICLE CELL

Electrical vehicle cell (10) featuring internal pressure relief and spring (38) disengagement devices which vent various internal pressures to atmosphere to prevent cell (10) bulging or explosion and which also internally interrupt currrent flow through the cell (10) due to internal all over heat, excessive current drawn and the like. Internal reconnection of cell (10) members reoccurs subsequent to internal thermal and other internal abnormalities. An alternate embodiment illustrates an apparatus and method for vacuum assisted filling of the electric vehicle cell (10).

Elektrischer Kleinakkumulator.

Rundzellenakkumulator mit dichtschichtig gewickelten Elektroden

Accumulatore elettrico

Mit hohen Strömen belastbarer elektrischer Akkumulator mit Wickelelektroden

ЭЛЕКТРОХИМИЧЕСКИЙ АККУМУЛЯТОРНЫЙ ЭЛЕМЕНТ

Раскрыт электрохимический аккумуляторный элемент, который содержит катодный лист, анодный лист и сепараторный лист между катодным и анодным листами. От продольного края катодного листа простирается токосъемник из металлической фольги. Другой токосъемник из металлической фольги простирается от продольного края анодного листа. Анодный лист, катодный лист и сепараторный лист намотаны в форме сплющенного рулона с получением сердцевины, в которой токосъемник из металлической фольги катодного листа простирается за пределы сепараторного листа на одном конце сердцевины, а металлический токосъемник анодного листа простирается за пределы сепараторного листа на противоположном конце сердцевины. Перекрывающиеся слои токосъемника из металлической фольги катодного листа сжаты вместе и находятся в электрическом соединении с положительным выводом аккумуляторного элемента, в то время как перекрывающиеся слои токосъемника из металлической фольги анодного листа сжаты вместе и находятся в электрическом соединении ...

ТРАНСПОРТНОЕ СРЕДСТВО С БАТАРЕЙНЫМ УСТРОЙСТВОМ

Раскрыто батарейное устройство для транспортного средства, способного к приведению в движение посредством электрической мощности. Транспортное средство включает в себя по меньшей мере один двигатель/генератор и батарейное устройство для подачи электрической мощности к двигателю/генератору и приема электрической мощности от двигателя/генератора. Батарейное устройство включает в себя множество аккумуляторных батарей, каждая из которых содержит множество элементов. Множество элементов в каждой аккумуляторной батарее электрически соединены один с другим. Предусмотрено множество корпусов аккумуляторных батарей для размещения в них множества элементов. Каждый корпус аккумуляторной батареи способствует электрическому соединению с одной или более другими аккумуляторными батареями. Устройство также включает в себя отсек, содержащий множество аккумуляторных батарей в их корпусах. Отсек способствует электрическому соединению с двигателем/генератором.

ЭЛЕКТРОХИМИЧЕСКИЙ АККУМУЛЯТОРНЫЙ ЭЛЕМЕНТ С ОТВОДНЫМИ КЛАПАНАМИ

В изобретении раскрыт электрохимический аккумуляторный элемент, который включает в себя по меньшей мере один катодный лист, по меньшей мере один анодный лист и по меньшей мере один сепараторный лист, объединенные с образованием сердцевины. Сердцевина размещена внутри прямоугольной оболочки с четырьмя сторонами и двумя концами, герметизированной воздухонепроницаемым уплотнением. Элемент также включает в себя отводной клапан по меньшей мере в одном из двух концов оболочки. Этот отводной клапан приспособлен открываться и сбрасывать избыточное давление выше заданного уровня, чтобы тем самым предотвратить катастрофический разрыв оболочки.

ЭЛЕКТРОХИМИЧЕСКИЙ АККУМУЛЯТОРНЫЙ ЭЛЕМЕНТ

Раскрыт электрохимический аккумуляторный элемент, который содержит катодный лист, анодный лист и сепараторный лист между катодным и анодным листами. От продольного края катодного листа простирается токосъемник из металлической фольги. Другой токосъемник из металлической фольги простирается от продольного края анодного листа. Анодный лист, катодный лист и сепараторный лист намотаны в форме сплющенного рулона с получением сердцевины, в которой токосъемник из металлической фольги катодного листа простирается за пределы сепараторного листа на одном конце сердцевины, а металлический токосъемник анодного листа простирается за пределы сепараторного листа на противоположном конце сердцевины. Перекрывающиеся слои токосъемника из металлической фольги катодного листа сжаты вместе и находятся в электрическом соединении с положительным выводом аккумуляторного элемента, в то время как перекрывающиеся слои токосъемника из металлической фольги анодного листа сжаты вместе и находятся в электрическом соединении ...

ЭЛЕКТРОХИМИЧЕСКИЙ ЭЛЕМЕНТ С НАМОТАННОЙ СЕРДЦЕВИНОЙ

Раскрыта сердцевина для электрохимического элемента, которая содержит анодный лист, катодный лист и сепараторный лист, расположенный между анодным листом и катодным листом. Анодный лист, катодный лист и сепараторный лист намотаны с образованием сплющенной рулонной структуры. Сплющенная рулонная структура имеет противоположные сплющенные стороны и противоположные дугообразные стороны. Анодный и катодный листы заканчиваются на одной и той же или разных дугообразных сторонах. Кроме того, сепараторный лист может заканчиваться на одной из дугообразных сторон.

REDOX - GEL BATTERY

Electrochemical Energy Cell, and Rechargeable Battery and also Method for Determining an Electrode Potential of an Electrode of an Electrochemical Energy Storage Cell

Lithium rechargeable battery

Flexible hinge type laminating technology

Electrode assembly for secondary battery and method for producing electrode assembly for secondary battery

Negative active material for rechargeable lithium battery and rechargeable lithium battery comprising same

Rechargeable battery

A rechargeable battery includes an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode wound together and a case housing the electrode assembly, wherein the electrode assembly has an inner surface and an outer surface having a concave portion.

Non-aqueous eletrolyte battery

Secondary cell and manufacturing method thereof

Secondary battery

An electrode assembly for a secondary battery comprising a first electrode having a first active material coated part and a first uncoated part that is not coated with active material, a second electrode having a second active material coated part and a second uncoated part that is not coated with active material, a separator between the first and second electrodes and a ceramic layer on the first uncoated part in a region that corresponds to the second active material coated part.

硬币型电池及其制造方法

... 将正极板(11)与负极板(12)卷绕成扁平状，使得正极层叠面(22a～22e)与负极层叠面(23a～23f)隔着隔膜交替层叠。这时，在卷绕开始的面对面的正极层叠面(22a、22b)及负极层叠面(23a)、以及卷绕结束的面对面的正极层叠面(22e)及负极层叠面(23f)上，形成位置偏移检测孔(41a、41b、42、43、44)，对卷绕的极板组进行X射线检查，根据孔位置的偏移来检测位置偏移。 ...

NONAQUEOUS SECONDARY BATTERY

Includes a ladder structure of the battery monomer

Battery module, method of fabricating the same, and vehicle having battery module

Each of battery cells (12) that constitute a battery module includes a flat-shaped rolled electrode body (30) formed by rolling a sheet-like anode collector (32) and a sheet-like cathode collector (34) along with a sheet-like separator, and a trailing edge (32E) of the sheet-like anode collector (32) and a trailing edge (34E) of the sheet-like cathode collector (34) are located at a position (30B) outside a portion of the rolled electrode body (30) which substantially receives a restraining load. The battery module, in which the restraining load is applied to the cells, achieves long service life while maintaining good output characteristics.

Rechargeable battery

Prismatic cell construction

Battery module

Contain the folding of the electrode and the diaphragm of the electrochemical cell, comprising the electrochemical cell of the battery pack and its preparation method

Secondary battery

A secondary battery, including an electrode assembly including a first electrode plate, a second electrode plate, and a separator disposed between the first and second electrode plates, wherein the electrode assembly includes a first electrode tab including a plurality of stacked first unit tabs protruding from the first electrode plate; and a second electrode tab including a plurality of stacked second unit tabs protruding from the second electrode plate, wherein the first electrode tab has a width, the width being greater than widths of each of the first unit tabs.

CELL AND METHOD OF MANUFACTURING THE SAME

PROCEDE DE FABRICATION D'UN GENERATEUR ELECTROCHIMIQUE ET GENERATEUR OBTENU PAR CE PROCEDE

PROCEDE DE FABRICATION D'UN GENERATEUR ELECTROCHIMIQUE ET GENERATEUR OBTENU PAR CE PROCEDE. PROCEDE DE FABRICATION D'UN GENERATEUR ELECTROCHIMIQUE DANS LEQUEL LES ELECTRODES DE POLARITE OPPOSEE 1, 2 SONT ENROULEES OU MISES EN PAQUET EN ALTERNANT LES POLARITES ET EN INTERPOSANT UN SEPARATEUR 3. L'UN DES BORDS 11 DE L'ELECTRODE POSITIVE 1 FAIT SAILLIE D'UN COTE DU ROULEAU OU DU PAQUET ET L'UN DES BORDS 12 DE L'ELECTRODE NEGATIVE 2 FAIT SAILLIE DU COTE OPPOSE. ON DEFORME LES BORDS SAILLANTS 11 ET 12 DES ELECTRODES DE CHAQUE COTE SELON UNE LIGNE SITUEE DANS UN PLAN PERPENDICULAIRE A L'AXE DU ROULEAU OU AU PLAN DES ELECTRODES DU PAQUET. ON PROCEDE AINSI AU PLIAGE SUIVANT CETTE LIGNE PUIS A UNE MISE A NIVEAU DES BORDS DES ELECTRODES.

STRUCTURE OF CONNECTION ELECTRIC FOR a UNIT OF CORE Of a SECONDARY BATTERY TO LITHIUM

SAFETY DEVICE FOR TIGHT ACCUMULATOR

BATTERY-CELL EQUIPEE Of a SENSOR IN the FILM SHAPE SENSITIVE TO the PRESSURE

Electrical energy storing assembly, e.g. lithium battery, producing device for use in production of capacitor, has supply unit including three sections to supply cathode and anode layer placed between external protection rolls

La présente invention concerne un dispositif de réalisation d'ensembles de stockage d'énergie électrique comprenant des moyens multiples d'alimentation de structures en film, des moyens de complexage des structures en film reçues en provenance des différents moyens d'alimentation, des moyens d'enroulement du complexe obtenu et des moyens de pilotage en continu et en synchronisme contrôlé des moyens d'alimentation, des moyens de complexage et des moyens d'enroulement.

Electrical energy storage assembly, e.g. capacitor, production device has two units for cutting layers transversely to their direction of movement, in order to form laminate having some layers set back from other layers

L'invention concerne un dispositif de réalisation d'ensembles de stockage d'énergie, comprenant des moyens d'alimentation (100, 200, 300) de films mono-couches ou multi-couches (90, 40, 92), des moyens d'entraînement (530) pour faire défiler ces films, des moyens (C) pour rassembler ces films en un complexe (96), et un mandrin (610) adapté pour enrouler ces films sous forme d'un enroulement multi-couches (10, 20, 30, 40, 50, 60), caractérisé en ce qu'il comprend des premiers moyens de coupe (270) pour sectionner transversalement à leur direction de défilement une ou plusieurs des couche(s) (40) formant le complexe (96) et des seconds moyens de coupe (550) pour sectionner transversalement à leur direction de défilement les couches restantes (10, 20, 30, 50, 60), de sorte que les couches sectionnées (40) par les premiers moyens (270) soient positionnées en retrait des autres couches (10, 20, 30, 50, 60) au niveau d'une extrémité de l'enroulement du complexe (96). Elle concerne également un ...

Device for producing energy storage assembly e.g. battery, has heating unit, and pressing unit to press extreme end of film roll against surface of rolled assembly in such way that end of roll sticks to surface

L'invention concerne un dispositif de réalisation d'ensembles de stockage d'énergie, comprenant des moyens d'entraînement (532, 534, 610) d'un film complexe, des moyens d'enroulement (610) du film complexe et des moyens de coupe (550) pour sectionner le film complexe en fin d'enroulement, caractérisé en ce qu'il comprend en outre des moyens de chauffage (562) pour chauffer le film complexe et des moyens (580) pour presser l'extrémité de fin d'enroulement du film contre la surface de l'ensemble enroulé, de sorte que la fin de l'enroulement adhère à cette surface. L'invention concerne également le procédé de réalisation d'ensembles de stockage d'énergie associé.

ELECTROCHEMICAL ACCUMULATOR HAS RESERVE Of ELECTROLYTE

Accumulateur électrochimique comportant une enceinte, généralement cylindrique ou prismatique comprenant de l'électrolyte liquide et un faisceau électrochimique comprenant au moins une alternance d'électrode positive de séparateur et d'électrode négative, caractérisé en ce qu'il comprend au moins en partie entre l'extrémité fermée de l'enceinte constituant le fond de l'accumulateur et le faisceau électrochimique, au moins un moyen de réserve d'électrolyte comportant un matériau poreux, en contact avec ledit faisceau.

METHOD FOR PRODUCING AN ELECTROCHEMICAL BUNDLE A LITHIUM SECONDARY CELL

CRUSH FOR PLANTABLE MEDICAL DEVICES

La présente invention concerne une pile à débit élevé pour un dispositif médical implantable, ayant un ensemble d'électrodes enroulées en spirale (30) logé dans un boîtier (20). La pile est caractérisée en ce que le boîtier (20) de pile présente une surface plane (16) opposée à une surface arquée (14) pour permettre la mise en butée étroite des autres composants situés dans le dispositif implantable tout en assurant également l'engagement efficace de la pile dans un bord arrondi correspondant du dispositif.

METHOD FOR MAKING A BEAM OF A LITHIUM SECONDARY BATTERY ELECTROCHEMICAL

L'invention concerne un procédé de réalisation d'un faisceau électrochimique (F) d'un accumulateur (A) au lithium, tel qu'un accumulateur Li-ion, en vue de son raccordement électrique aux bornes de sortie de l'accumulateur, caractérisé par la combinaison de deux étapes de pliage d'un faisceau électrochimique d'accumulateur au lithium distinctes dans leur mise en œuvre, à savoir un rabattement radial avec déformation plastique et un tassage axial, qui permettent d'obtenir deux zones distinctes sur au moins une, de préférence chacune, des extrémités latérales du faisceau. L'invention concerne également un procédé de réalisation d'une partie de raccordement électrique entre le faisceau électrochimique et l'une des bornes de sortie de l'accumulateur, ainsi qu'un collecteur de courant associé.

ACCUMULATOR WITH THE LITHIUM AND ITS MANUFACTORING PROCESS

L'invention concerne un accumulateur au lithium. Elle se rapporte à un accumulateur au lithium qui comprend un film séparateur (200), plusieurs plaques cathodiques (300) de dimension voulue, collées à une première surface du film séparateur (200) tout en étant espacées uniformément les unes des autres, plusieurs plaques anodiques (400) ayant une dimension voulue et collées à l'autre surface du film séparateur (200) à des positions espacées correspondant aux plaques cathodiques, le film séparateur (200) fixé aux plaques anodiques (400) et aux plaques cathodiques (300), formé de polyéthylène ou de polypropylène, étant plié de manière répétée afin que les plaques anodiques (400) et les plaques cathodiques (300) soient disposées en alternance. Application aux accumulateurs électriques ...

NON-AQUEOUS SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

RECHARGEABLE BATTERY

Cylindrical lithium ion secondary battery having functional center pin

Electrolyte Assembly for Secondary Battery of Novel Laminated Structure

Electrode Assembly of Novel Structure and Process for Preparation of the Same

파우치 타입 배터리

... 본 발명의 일실시예는 전극조립체의 변형을 억제하는 파우치 타입 배터리에 관한 것이다. 본 발명의 일실시예에 따르면, 제1전극, 제2전극 및 상기 제1전극과 제2전극 사이에 형성되는 세퍼레이터가 권취된 전극조립체와 전해액과 상기 전극 조립체 및 상기 전해액를 수용하는 파우치 및 상기 전극조립체의 권취 끝단을 고정하는 고정부재를 포함하고, 상기 고정부재는 기재층과 상기 기재층의 일측에 형성되어 상기 전극조립체의 외부 표면에 접촉되는 점착층을 포함하며, 상기 기재층은 상기 전해액과 접촉하면 적어도 일부가 녹아서 상기 점착층이 분리되는 것을 특징으로 형성되는 파우치 타입 배터리를 개시한다.

Secondary battery

COIN-SHAPED CELL, AND MANUFACTURING METHOD THEREOF

FLAT BATTERY AND PRODUCTION METHOD THEREFOR

Electrode assembly and rechargeable battery including the same

An electrode assembly and a rechargeable battery including the same, the electrode assembly including a first electrode, a second electrode, and a separator interposed therebetween, wherein the first electrode, the second electrode, and the separator are spiral-wound in a jelly-roll structure, the first electrode includes at least two first uncoated regions separated from each other and a first tab coupled to one of the first uncoated regions and a second tab coupled to another of the first uncoated regions, the first tab and the second tab protruding from one side of the jelly-roll structure, the first tab is disposed near a center of the jelly-roll structure and the second tab is disposed near an outer circumference of the jelly-roll structure, and a width of the first tab is smaller than a width of the second tab.

Battery pack

A battery pack includes a bare cell including an electrode assembly, a can housing the electrode assembly; and a cap plate sealing an open end of the can; a protective circuit module on the bare cell and including a lead member electrically coupling the protective circuit module to the bare cell; an upper cover coupled to the bare cell and covering the protective circuit module; and a shock absorber between the upper cover and the lead member.

Rechargeable battery

A rechargeable battery including an electrode assembly; a case having an opening and containing the electrode assembly; a cap plate sealing the opening of the case; an electrode terminal electrically connected to the electrode assembly and protruding outside the case; and an insulating member between the electrode assembly and the cap plate and adjacent the electrode terminal, the insulating member including an inclined portion facing the electrode assembly.

Middle or large sized battery

Disclosed herein is a middle or large sized battery, more particularly, a middle or large sized battery that provides improved volume energy density provides an advantageous structure for preparing an end cell with large capacity, particularly by improving the structure of a can and internal connecting system of positive and negative electrodes in the middle or large sized battery. According to the present invention, a middle or large sized battery is provided which comprises a can having an open portion formed on two opposing sides; an electrode jelly roll disposed inside the can, and comprising a current collector of positive electrode, a separator, and a current collector of negative electrode being stacked in turn and wound therein; a lead tab connected to the current collector of positive and negative electrodes of opposing sides in the electrode jelly roll; and a lateral cap assembly electrically in contact with the lead tab and coupled to the opposing sides of the can.

Electrical energy storage cell and electrical energy storage module including the same

The storage cell includes a flat roll electrode that includes a strip of positive electrode having a positive electrode current collector foil and a positive electrode layer formed thereon, a strip of negative electrode having an electrode current collector foil and a negative electrode layer formed, and a strip of electrically insulated separator, the strip of positive electrode and the strip of negative electrode being wound into a flat roll configuration with the strip of electrically insulated separator sandwiched therebetween; a sealed casing that hermetically seals the flat roll electrode impregnated with an electrolyte; a positive terminal and a negative terminal each electrically insulated from the sealed casing, connected to the positive current collector foil and the negative current collector foil, respectively.

Battery and battery pack having the same

A battery includes an electrode assembly having a first electrode plate and a second electrode plate each having an uncoated portion, and a separator located between the first electrode plate and the second electrode plate; a case accommodating the electrode assembly and having an opening; an electrode terminal connected to the electrode assembly and protruding from the case; and a cap assembly comprising a cap plate sealing the opening of the case, wherein the electrode assembly is constructed such that at least one of the uncoated portions of the first and second electrode plates extends along only a portion of the electrode assembly, and wherein the case has a bent portion formed on at least one side to generally correspond to the electrode assembly.

Secondary battery

A secondary battery includes an electrode assembly including a first electrode plate including a first electrode non-coating portion on which an active material of the first electrode plate is not coated, a second electrode plate including a second electrode non-coating portion on which an active material of the second electrode plate is not coated, and a separator between the first and second electrode plates; a collector electrically connected to an electrode non-coating portion of the first and second electrode non-coating portions, the collector including an insulation part at an insulation region of the collector adjacent the first and second electrode plates; and a case accommodating the electrode assembly and the collector.

Electrode assembly and secondary battery including electrode assembly

Provided is a secondary battery that can raise the strength of a case by including an electrode assembly that has a negative electrode plate in the outermost part. For example, illustrated is an electrode assembly including a negative electrode plate comprising a negative electrode collector, the negative electrode collector having a first negative electrode coating portion disposed on a side of the negative electrode collector and a second negative electrode coating portion disposed on the other side of the electrode collector, a positive electrode plate including a positive electrode collector, the positive electrode collector having a first positive electrode coating portion disposed on a side of the positive electrode collector and a second positive electrode coating portion disposed on the other side of the electrode collector, and a separator disposed between the negative electrode plate and the positive electrode plate, wherein the negative electrode plate is disposed in the outermost part when the negative electrode plate, the positive electrode plate, and the separator are wound.

Secondary battery

A secondary battery includes a plurality of electrode assemblies, a current collector electrically connected to each of the electrode assemblies, a case accommodating the plurality of electrode assemblies and the current collector, a cap plate sealing the case, and an electrode terminal electrically connected to the current collector and penetrating the cap plate, wherein the plurality of electrode assemblies are arranged such that an axis of each electrode assembly is parallel to a bottom surface of the case and the plurality of electrode assemblies are disposed in a longitudinal direction.

Rechargeable battery

In one aspect, a rechargeable battery for efficiently controlling a composite thickness on both edges of a coated unit when an uncoated region on an edge of an electrode plate is used for an electrode assembly is provided. The rechargeable battery can include: an electrode assembly including electrodes with opposite polarities on both ends of a separator; and an electrode terminal connected to the electrode assembly wherein the electrode includes a coated unit coated with a composite on an electrode plate and an uncoated region set on an edge of the electrode plate exposed on the coated unit.

Secondary battery and method of manufacturing secondary battery

A secondary battery includes a power generating electrode body, which is formed by stacking power generating elements having a separator, and a frame storing the stacked power generating electrode body wherein the power generating electrode body is stored in the frame in such a state that an electrolyte penetrates the separator at a predetermined speed and the separator is impregnated with the electrolyte supplied to the power generating electrode body in such a state that the inside of the frame is depressurized by a decompression device, and the frame sealed by a lid body while being depressurized is pressed from the stacking direction of the power generating elements by a pressing device, whereby the frame is formed into a predetermined shape.

Composite, electrode active material for secondary lithium battery including the composite, method of preparing the composite, anode for secondary lithium battery including the electrode active material, and secondary lithium battery including the anode

A composite includes a compound selected from the group consisting of a lithium lanthanum zirconium oxide and a lithium lanthanum tantalum oxide; a lanthanum oxide; and an oxide selected from the group consisting of a lanthanum zirconium oxide and a lanthanum tantalum oxide. An electrode active material for a secondary lithium battery may include such composite. Methods of preparing the composite, an electrode for a secondary lithium battery including the electrode active material, and a secondary lithium battery including the electrode are disclosed.

Cell

A cell in which thermal welding of a laminate packaging is performed so that the thickness of a thermal welded portion including an electrode terminal is larger than that of a thermal welded portion including no electrode terminal.

Implantable Medical Device Having an MRI Safe Rechargeable Battery

Disclosed are improved rechargeable battery designs for an implantable medical device. The improved rechargeable battery is designed to reduce eddy currents in the conductive anode and/or cathode plates within the battery housing, thereby reducing excessive heat and vibrations caused when the battery is placed in a high magnetic field, such as within a MRI machine. Discontinuities may be cut in the anode and/or cathode plates to increase their resistance to eddy currents, while not significantly affecting the internal resistance between these plates.

Battery cell and device provided with the battery cell

The battery cell have a first and a second current collector, wherein the first current collector is connected to part of both of, part of any one of, or the whole of any one of a pair of positive-electrode layer stack sections of an electrode assembly, the second current collector is connected to part of both of, part of any one of, or the whole of any one of a pair of negative-electrode layer stack sections, and a connecting location between the first current collector and the positive-electrode layer stack sections and a connecting location between the second current collector and the negative-electrode layer stack sections are set so as to be asymmetrical to each other with respect to a second virtual plane.

Sealed battery

A sealed battery including: an electrode assembly 11 having multiple positive electrode substrates exposed at one end and negative electrode substrates exposed at the other end; and collectors 18 1 and collector receiving parts 18 3 that are resistance-welded on both sides of the multiple positive or the multiple negative electrode substrates or both, grooves 23 being formed around the resistance-welded portion of at least one of the collector 18 1 and the collector receiving part 18 3 . Due to the spattered particles 26 generated during the resistance-welding being captured within the grooves 23 , few particles burst into the inside of the electrode assembly 11 or into the outside.

Winding assembly for electrochemical cells, methods of making the winding assembly, and the electrochemical cell

A winding assembly including positive and negative electrodes and a separator sheet wound in an overlying relationship such that the separator sheet is positioned between the positive and negative electrodes, and such that an exposed edge of the positive electrode is spaced longitudinally from an unexposed edge of the negative electrode at one end, and such that an exposed edge region of the negative electrode is spaced longitudinally from an unexposed edge of the positive electrode at an opposite end, and wherein a portion of the positive electrode proximate to the exposed edge of the positive electrode comprises a first plurality of apertures and a portion of the negative electrode proximate to the exposed edge of the negative electrode comprises a second plurality apertures.

Battery

A battery outer covering for housing the winding-type power generating element is formed by an outer covering main body having an open face and a lid body for closing the open portion of the outer covering main body. The current collecting members and external terminals are disposed inside and outside the lid body. The current collecting members are fixed to the lid body and electrically connected to the external terminals. The power generating element includes a winding core which serves as a winding center of the electrode sheets and has rigidity. The power generating element has the winding core having the rigidity at a winding center. At least one end of the winding core is supported on an inner wall face of the outer covering main body.

BATTERY

The present invention provides a battery includes an exterior body formed of a laminate film, the exterior body having a welded portion , a power generating element stored in the exterior body , the power generating element being formed by winding electrodes and having an inner and an outer circumferential surface, and a positive and a negative electrode terminal which are connected to the power generating element , the terminals being exposed to the outside of the exterior body , and in a projected plane with respect to a plane where the welded portion is arranged, the welded portion of the exterior body is arranged in a region between an intermediate point of an inner circumferential end and an outer circumferential end of the power generating element , and a side end () of the electrode terminal (). 1. A battery comprising:an exterior body formed of a laminate film, the exterior body having a welded portion;a power generating element stored in the exterior body, the power generating element being formed by winding electrodes and having an inner circumferential surface and an outer circumferential surface; anda lead terminal connected to the power generating element, the lead terminal being exposed to the outside of the exterior body, whereinin a projected plane with respect to a plane where the welded portion is arranged, the welded portion of the exterior body is arranged in a region between an intermediate point of an end of the inner circumferential surface and an end of the outer circumferential surface of the power generating element, and a side end of the lead terminal.2. The battery according to claim 1 , wherein the welded portion is formed by welding a part of an inner surface and a part of an outer surface of the laminate film in a face-to face state.3. The battery according to claim 1 , wherein a positive electrode lead terminal is arranged so as to be exposed from a sealed portion provided at one end of the exterior body claim 1 , and a negative ...

Secondary battery assembly

A secondary battery assembly of the present invention comprises: a secondary battery including a wound electrode body enclosed in a flat rectangular case; a contact member partly contacting a side surface having a maximum area (pressed surface) of outer surfaces of the battery; and a binding member for binding the battery and the contact member, the binding member binding the contact member to partly press against the pressed surface. The contact member includes: a plurality of contact parts arranged discretely, each contact part being in contact with the pressed surface; and a connecting part connecting the contact parts. The contact parts are protruding from the connecting part toward the pressed surface, and to press more strongly both one-side regions of the pressed surface corresponding to portions off the center of the wound body in the winding axis direction, and to press less strongly a central region between the one-side regions.

Increasing the stiffness of battery cells for portable electronic devices

The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. The layers may be wound to create a jelly roll prior to sealing the layers in the flexible pouch. The stiffness of the battery cell may be increased by applying a pressure of at least 0.13 kilogram-force (kgf) per square millimeter and a temperature of about 85° C. to the layers.

LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

A lithium secondary battery provided by the present invention includes a spirally wound electrode body in which a positive electrode sheet and a negative electrode sheet are spirally wound with a separator sheet interposed therebetween, wherein on a sheet surface of at least any one from among the positive electrode sheet, negative electrode sheet, and separator sheet constituting the spirally wound electrode body, a porous layer is formed along a longitudinal direction of the sheet , and the porous layer is thicker in a spiral winding direction of the spirally wound electrode body in a winding center portion than in a winding outer portion 1. A lithium secondary battery comprising a spirally wound electrode body in which a positive electrode sheet and a negative electrode sheet are spirally wound with a separator sheet interposed therebetween , whereinon a sheet surface of at least any one from among the positive electrode sheet, negative electrode sheet, and separator sheet constituting the spirally wound electrode body, a porous layer is formed along a longitudinal direction of the sheet, andthe porous layer is thicker in a spiral winding direction of the spirally wound electrode body in a winding center portion than in a winding outer portion.2. The lithium secondary battery according to claim 1 , wherein an average thickness of the porous layer formed in an area of up to 20% of the sheet claim 1 , on which the porous layer is formed claim 1 , from an end portion of the spirally wound electrode body on a spiral winding center side in the spiral winding direction of the spirally wound electrode body is larger than an average thickness of the porous layer formed in an area of up to 20% from an end portion of the spirally wound electrode body on a winding outer side.3. The lithium secondary battery according to claim 1 , wherein the porous layer is formed such as to increase gradually in thickness from the winding outer side to the spiral winding center side of the ...

SECONDARY BATTERY

A secondary battery adapted to minimize deterioration attributable to temperature is provided. 2. The secondary battery according to claim 1 , wherein current-collector foils that constitute the non-coated sections of the positive and negative electrode sheets are bundled together at the end portions of the planar region of the electricity-generating element group so as to come into contact.3. The secondary battery according to claim 1 , wherein the distance between the two connections is the same as between the non-coated sections of the positive and negative electrode sheets.4. The secondary battery according to claim 1 , wherein the non-coated sections of the positive and negative electrode sheets and one side of each of the positive and negative electrode connecting sheets are interconnected by ultrasonic welding.5. The secondary battery according to claim 1 , wherein the positive electrode connecting sheet and the positive electrode external terminal are constructed as a single member claim 1 , and the negative electrode connecting sheet and the negative electrode external terminal also being constructed as a single member. The present invention relates generally to secondary batteries, and more particularly, to a secondary battery including an electricity-generating element group of a cross-sectionally elliptic shape with a positive electrode sheet and a negative electrode sheet, both wound in spiral form via a separator.Secondary batteries are widely known as secondary batteries for vehicle driving. Such a secondary battery includes following components: a positive electrode sheet and a negative electrode sheet, both forming part of an electricity-generating element group, a separator that separates the positive electrode sheet and the negative electrode sheet from each other, and an electrolyte. These components are housed together in an enclosed battery container made of a metal or resin. The secondary battery also includes external terminals fixed to the ...

Electrical Insulator for Electrochemical Cell

An insulation portion for an electrochemical cell having a plurality of slots into which bent electrode tabs are slid through during an assembly process of an electrochemical cell. A latch is disposed adjacent the slots and is movable from a resting position to a biased position to engage the electrode tabs. Attachment of the insulation portion to the electrochemical cell and bending of the electrode tabs can be robotically performed, such that controllers of an attachment device and bending device are in communication with each other. 1. An insulator for engaging a plurality of electrode tabs of an electrochemical cell , the insulator comprising:a plurality of fingers separated from each other by a slot, the slot including a closed end and an open end; anda latch disposed adjacent the open end of the slot,wherein the latch is movable from a resting position to a biased position.2. The insulator of claim 1 , wherein a peripheral edge extends along an outermost one of the fingers to form a wall.3. The insulator of claim 1 , wherein when the latch is in the biased position a path of entry for at least one of the electrode tabs is increased claim 1 , and the path of entry is decreased when the latch is in the resting position.4. The insulator of claim 1 , wherein a periphery of the latch has grooves that correspond to the fingers.5. The insulator of claim 1 , wherein a plurality of slots are provided claim 1 , and one of the slots is between each adjacent pair of fingers and between an outermost finger and the peripheral edge.6. The insulator of claim 1 , wherein the insulator is extended in an arc shape and comprises a peripheral edge.7. The insulator of claim 6 , wherein the fingers merge with each other at a base portion claim 6 , the base portion extending from the peripheral edge to an innermost one of the fingers.8. The insulator of claim 6 , comprising a rib that is extended from the peripheral edge to an inner peripheral portion of the insulator for engagement ...

CURVED BATTERY CELLS FOR PORTABLE ELECTRONIC DEVICES

The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. The layers may be wound to create a jelly roll prior to sealing the layers in the flexible pouch. A curve may also be formed in the battery cell by applying a pressure of at least 0.13 kilogram-force (kgf) per square millimeter to the layers using a set of curved plates applying a temperature of about 85° C. to the layers. 1. A battery cell , comprising: a cathode with an active coating,', 'a separator, and', 'an anode with an active coating;, 'a set of layers comprising,'}wherein the set of layers were curved during a manufacturing process to form a curved battery cell.2. The battery cell of claim 1 , wherein the curved battery cell is a lithium-polymer battery cell.3. The battery cell of claim 1 , further comprising a flexible pouch enclosing the curved battery cell and configured to contain an electrolyte for the battery cell.4. The battery cell of claim 1 , wherein the set of layers are wound to create a jelly roll claim 1 , and wherein the jelly roll is curved during the manufacturing process.5. The battery cell of claim 1 , wherein the set of layers further comprise a binder coating used to laminate the set of layers together during the manufacturing process claim 1 , wherein the manufacturing process involved applying a pressure and a temperature to the set of layers.6. The battery cell of claim 1 , wherein a curve is formed at one end of the battery cell during the manufacturing process.7. The battery cell of claim 1 , wherein a curve is formed at two ends of the battery cell during the manufacturing process.8. A portable electronic device claim 1 , comprising:a set of components powered by a battery cell; a cathode with an active coating,', 'a separator, and', 'an ...

ELECTRODE ASSEMBLY OF NOVEL STRUCTURE AND PROCESS FOR PREPARATION OF THE SAME

Disclosed herein is an electrode assembly of a cathode/separator/anode structure, wherein a plurality of first unit electrodes and a second electrode sheet are wound so that the first unit electrodes are opposite to the second electrode sheet via a separator sheet, and a first electrode and a second electrode have opposite polarities. 1. An electrode assembly of a cathode/separator/anode structure , wherein a plurality of first unit electrodes and a second electrode sheet are wound so that the first unit electrodes are opposite to the second electrode sheet via a separator sheet , and a first electrode and a second electrode have opposite polarities.2. The electrode assembly according to claim 1 , wherein the electrode assembly is configured to have a structure in which claim 1 , in a state in which the first unit electrodes and the second electrode sheet claim 1 , between which a first separator sheet is disposed claim 1 , are placed on a second separator sheet claim 1 , the first unit electrodes claim 1 , the second electrode sheet claim 1 , the first separator sheet and the second separator sheet are sequentially wound by a width of each of the first unit electrodes in a longitudinal direction (a lengthwise direction) of the separator sheets.3. The electrode assembly according to claim 2 , wherein the electrode assembly is configured to have a structure in which claim 2 , in a state in which the second electrode sheet claim 2 , the first separator sheet and the first unit electrodes are sequentially placed on the second separator sheet upward claim 2 , the second electrode sheet claim 2 , the first separator sheet claim 2 , the first unit electrodes and the second separator sheet are sequentially wound by the width of each of the first unit electrodes in the longitudinal direction (the lengthwise direction) of the sheets.4. The electrode assembly according to claim 2 , wherein the electrode assembly is configured to have a structure in which claim 2 , in a state ...

SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME

A secondary battery has: an electrode group which includes sheet-form positive and negative electrode plates each including a metallic foil having an active material applied onto both sides of the metallic foil, and a separator disposed between the positive and negative electrode plates, wherein the positive and negative electrode plates and the separator are spirally wound together around a winding core into a flattened shape, wherein the electrode group has, at the both ends thereof as viewed in the winding core direction, respectively formed metallic foil exposed portions of the positive and negative electrode plates onto which the active material is not applied; a battery container which contains the electrode group therein, wherein the battery container has a battery casing and a battery cap; and positive and negative external terminals electrically connected to the metallic foil exposed portions of the positive and negative electrode plates, respectively. Winding end portions in the metallic foil exposed portions of the positive and negative electrode plates are arranged opposite to the inner surface of the battery container through respective conducting members. 1. A secondary battery comprising:an electrode group including sheet-form positive and negative electrode plates each including a metallic foil having an active material applied onto both sides of the metallic foil, and a separator disposed between the positive and negative electrode plates, the positive and negative electrode plates and the separator being spirally wound together around a winding core into a flattened shape, the electrode group having, at the both ends thereof as viewed in the winding core direction, respectively formed metallic foil exposed portions of the positive and negative electrode plates onto which the active material is not applied;a battery container which contains the electrode group therein, the battery container having a battery casing and a battery cap; andpositive and ...

SECONDARY BATTERY AND METHOD OF PREPARING THE SAME

A shaft core includes a positive electrode shaft core portion having a positive electrode splaying portion at one end, a negative electrode shaft core portion having a negative electrode splaying portion at the other end, and an insulation portion that mutually insulates and integrates the positive and negative electrode shaft core portions. The positive electrode plate is electrically connected to the positive electrode collector in a state of being splayed through the positive electrode splaying portion, and the negative electrode plate is electrically connected to the negative electrode collector being splayed through the negative electrode splaying portion. The positive and negative electrode shaft core splaying portions press and open their respective electrode laminates at the end surfaces of the wound electrode group, the positive electrode connection piece and the positive electrode collecting portion are welded, and the negative electrode connection piece and the negative electrode collecting portion are also welded. 1. A secondary battery comprising:a wound electrode group configured by winding a positive electrode plate and a negative electrode plate through a separator on an outer circumferential portion of a shaft core;a vessel which accommodates the wound electrode group, has an inside sealed with a lid, and is provided with a positive electrode external terminal and a negative electrode external terminal on an external surface;a positive electrode collector that electrically connects the positive electrode plate to the positive electrode external terminal;a negative electrode collector that electrically connects the negative electrode plate to the negative electrode external terminal;a positive electrode splaying portion and a negative electrode splaying portion that press and splay a laminate of the positive electrode plates and a laminate of the negative electrode plates from inside at both end surfaces of the wound electrode group,wherein the shaft ...

Non-aqueous electrolyte secondary battery and method for producing the same

Disclosed is a non-aqueous electrolyte secondary battery including: a spirally-wound electrode group including a continuous first electrode, a continuous second electrode, and a continuous separator interposed between the first electrode and the second electrode; and a non-aqueous electrolyte. The first electrode includes a sheet-like first current collector, and a first active material layer formed on a surface of the first current collector; and the second electrode includes a sheet-like second current collector, and a second active material layer formed on a surface of the second current collector. In the electrode group, the winding terminal end of the first electrode faces the second electrode on the further outer peripheral side, with the separator interposed therebetween. The facing site of the second electrode where the second electrode faces the winding terminal end of the first electrode is reinforced with a reinforcing component for supplementing the thickness of the second electrode.

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A main object of the present invention to provide a nonaqueous electrolyte secondary battery having high durability towards charge and discharge cycles, by preventing buckling of a wound electrode body. The secondary battery provided by the present invention comprises: a nonaqueous electrolyte; and a wound electrode body configured by superposing on each other, and winding a positive electrode sheet having a positive electrode collector formed to a sheet shape and a positive electrode active material layer formed on that collector, a, negative electrode sheet having a negative electrode collector formed to a sheet shape and a negative electrode active material layer formed on that collector, and a separator formed to a sheet shape. The negative electrode active material contained in the negative electrode active material layer is oriented in a predetermined direction. The positive electrode sheet , negative electrode sheet and separator sheet all have a tensile elongation at break of 2% or higher. 1. A nonaqueous electrolyte secondary battery , comprising:a nonaqueous electrolyte; anda wound electrode body configured by superposing on each other, and winding a positive electrode sheet having a positive electrode collector formed to a sheet shape and a positive electrode active material layer formed on that collector, a negative electrode sheet having a negative electrode collector formed to a sheet shape and a negative electrode active material layer formed on that collector, and a separator formed to a sheet shape,{'sup': '3', 'wherein a density of the positive electrode active material layer ranges from 1.7 to 2.7 g/cm,'}{'sup': '3', 'a density of the negative electrode active material layer ranges from 0.9 to 1.7 q/cm, and'}the negative electrode active material layer contains graphite as a negative electrode active material, the graphite is oriented in a predetermined direction, and the positive electrode sheet, the negative electrode sheet and the separator ...

LEAD-ACID BATTERY DESIGN HAVING VERSATILE FORM FACTOR

An electrochemical storage device comprises a plurality of layer electrodes, wherein each layer electrode includes a first charged sector and a second charged sector, wherein the second charged sector is charged oppositely compared to the first charged sector, and wherein the plurality of layer electrodes are assembled with respect to each other such that the first charged sector of a first plate of the plurality of layer electrodes is laid below the second charged sector of a second plate of the plurality of layer electrodes located immediately above the first plate, wherein the charges of the first charged sectors of the first and second plates have a first sign and the charges of the second charged sectors of the first and second plates have a second sign that is opposite the first sign; a separator sector located, and enabling ionic charge exchange between the first charged sector of the first plate and the second charged sector of the second plate. 1. A spiral wound electrochemical storage device , the device comprising:a cylindrical cell pack including a plurality of cylindrical cell stacks, wherein each cell stack includes a cell strip rolled from a flat configuration to form the cell stack; anda cylindrical case for housing the cylindrical cell pack.2. The electrochemical storage device of claim 1 , wherein the plurality of cell stacks are connected in series.3. The electrochemical storage device of claim 1 , wherein each cell stack includes a plurality of strips including a positive half electrode strip claim 1 , a negative half electrode strip claim 1 , and a separator half part strip claim 1 , and wherein the plurality of half strips are laid over each other to form the cell stack.4. The electrochemical storage device of further comprising a center mandrel claim 1 , wherein the cell stack is rolled around the center mandrel.5. An electrochemical storage device comprising:an electrochemical cell pack, wherein the electrochemical cell pack terminates in a ...

ELECTRODE ASSEMBLY AND SECONDARY BATTERY USING THE SAME

An electrode assembly and a secondary battery including the same. The electrode assembly includes: a positive electrode plate including a positive electrode active material applied to a positive electrode collector; a negative electrode plate including a negative electrode active material applied to a negative electrode collector; a separator disposed between the positive electrode plate and the negative electrode plate; and a ceramic layer disposed on a portion of the positive or negative electrode plate, adjacent to an outer surface of the electrode assembly. The positive electrode plate, the negative electrode plate, ceramic layer, and the separator are wound together. The ceramic layer prevents a short-circuit between the positive electrode plate and the negative electrode plate, and extends along between about 40% and 90% of the length of the positive or negative electrode plate, from a winding end thereof. 1. An electrode assembly of a secondary battery comprising:a positive electrode plate comprising a positive electrode active material applied to a positive electrode collector, wherein a first positive electrode non-coating portion is on a winding end of the positive electrode plate, and a second positive electrode non-coating portion is on an end of the positive electrode plate opposite the winding end;a negative electrode plate comprising a negative electrode active material applied to a negative electrode collector;a separator between the positive electrode plate and the negative electrode plate; anda ceramic layer formed on at least one surface of the separator, and extending from the winding end of the positive electrode plate, along between about 40% and about 90% of the length of the positive electrode plate,wherein the winding end is located at an outer ring of the electrode assembly, and the positive electrode plate, the negative electrode plate, the ceramic layer, and the separator are wound together.2. The electrode assembly as claimed in claim 1 ...

METHOD AND DEVICE FOR PRODUCING AN ELECTROCHEMICAL ENERGY STORAGE CELL AND ALSO AN ENERGY STORAGE CELL

The invention relates to a method and a corresponding device for producing an electrochemical energy storage cell which exhibits at least one electrode stack () and/or electrode coil and a casing () at least partially surrounding the electrode stack or electrode coil, respectively, wherein the energy storage cell is at least partially filled with electrolyte () and a massaging movement is exerted on the casing () which at least partially surrounds the electrode stack () or electrode coil. 1. A method for producing an electrochemical energy storage cell exhibiting at least one electrode stack and/or electrode coil and a casing at least partially surrounding the electrode stack or electrode coil , respectively , wherein the energy storage cell is at least partially filled with electrolyte , the method comprising:exerting a massaging movement on the casing which at least partially surrounds the electrode stack or electrode coil, respectively.2. The method according to claim 1 , wherein by the massaging movement locally variable pressures are exerted on at least one side wall of the casing.3. The method according to claim 2 , wherein the locally variable pressures are time-variable.4. The method according to claim 1 , wherein the massaging movement is exerted simultaneously on two opposite side walls of the casing.5. The method according to claim 1 , wherein an escape of possible gases claim 1 , particularly in the form of gas bubbles claim 1 , from the inside of the energy storage cell is promoted by the massaging movement.6. The method according to claim 1 , wherein the massaging movement is exerted during the filling of the energy storage cell with electrolyte.7. The method according to claim 1 , wherein the massaging movement is exerted while the energy storage cell is located in an environment in which the prevailing pressure is lower than the atmospheric pressure.8. The method according to claim 1 , wherein the massaging movement is exerted by at least one ...

DEVICE FOR FOLDING ELECTRODE ASSEMBLY

Disclosed herein is a folding device to manufacture a stacked/folded type electrode assembly having unit cells sequentially stacked in a state in which a separation film is disposed between the respective unit cells, the folding device including a web supply unit to supply a web having plate-shaped unit cells arranged at a top of a separation film at predetermined intervals, a winding jig to rotate the unit cells while holding a first one of the unit cells of the web so that the unit cells are sequentially stacked in a state in which the separation film is disposed between the respective unit cells, and a rotary shaft compensation unit to compensate for the position of a rotary shaft of the winding jig in an advancing direction of the web (X-axis direction), wherein the rotary shaft compensation unit periodically changes the position of the rotary shaft to compensate for the change in X-axis velocity (Vx) of the web caused during winding of the plate-shaped unit cells, thereby uniformly maintaining tension of the web. 1. A folding device to manufacture a stacked/folded type electrode assembly having unit cells sequentially stacked in a state in which a separation film is disposed between the respective unit cells , the folding device comprising:a web supply unit to supply a web having plate-shaped unit cells arranged at a top of the separation film at predetermined intervals;a winding jig to rotate the unit cells while holding a first one of the unit cells of the web so that the unit cells are sequentially stacked in a state in which the separation film is disposed between the respective unit cells; anda rotary shaft compensation unit to compensate for a position of a rotary shaft of the winding jig in an advancing direction of the web (X-axis direction), whereinthe rotary shaft compensation unit periodically changes the position of the rotary shaft to compensate for the change in X-axis velocity (Vx) of the web caused during winding of the plate-shaped unit cells, ...

CYLINDRICAL SECONDARY BATTERY

The present invention provides a cylindrical secondary electrode including a first electrode plate, a second electrode plate, a separator interposed between the first electrode plate and the second electrode plate, and a case having a space for receiving the electrode assembly, wherein the cylindrical secondary electrode may include a core element having a space at the center thereof and having a tubular shape with a circular cross section, which is inserted into a space at the center of an electrode assembly and has at least one slit including a bent portion. 1. A secondary battery , comprising:a core element having a bore defining a longitudinal axis surrounded by a peripheral surface perforated by an arrayed plurality of slits, each comprising a bent portion; andan electrode assembly formed wound around said peripheral surface of said core coaxially with said longitudinal axis.2. The secondary battery of claim 1 , wherein the slits are arranged in a first direction claim 1 , and the bent portion has a concave shape with a concavity facing a second direction claim 1 ,wherein the first direction defines a longitudinal direction of the core element and the second direction is perpendicular to the first direction.3. The cylindrical secondary battery of claim 1 , wherein the length of the slits measured from the uppermost portion to the lowest portion is in the range of about 1 mm to about 2 mm.4. The cylindrical secondary battery of claim 1 , wherein the length of the slits measured from the uppermost portion to the lowest portion is in the range of about 120% to about 140% of the distance between the electrode assembly and the core element.5. The cylindrical secondary battery of comprising at least two rows of slits spaced at generally regular intervals claim 1 , wherein the slits in successive rows are disposed in a staggered pattern.6. The cylindrical secondary battery of comprising at least two rows of slits spaced at generally regular intervals with the slits in ...

Electrical Storage Device and Method of Manfacturig Electrical Storage Device

An electrochemical capacitor that is resistant to vibration is provided. A positive current collecting member 39 is welded to an unapplied portion 25 of a positive electrode 9 included in a wound electrode group 5 . An outer peripheral portion 40 of the positive current collecting member 39 is shaped and sized to extend to a position beyond a top portion 3 c of an annular projected portion 3 a . An insulating ring member 63 is disposed in a compressed state between the positive current collecting member 39 and the annular projected portion 3 a and also between the positive current collecting member 39 and the annular projected portion 3 a and an annular wall portion 3 d of a peripheral wall portion that is continuous with the annular projected portion. This configuration makes it possible to reliably fix an electrode group unit in a container 3 while preventing a short circuit.

CYLINDRICAL SECONDARY BATTERY

A cylindrical secondary battery is disclosed. The cylindrical secondary battery includes a jelly-roll type electrode assembly, a center pin inserted to penetrate the central portion of the jelly-roll type electrode assembly, a can accommodating the electrode assembly and the center pin, a cap assembly coupled to an upper opening of the can to seal the can, and a gasket interposed between the can and the cap assembly. In the jelly-roll type electrode assembly, a first electrode, a second electrode and a separator interposed between the two electrodes are wound together. An electrode tape is attached to at least one surface of an uncoated portion of the first electrode at a core of the jelly-roll type electrode assembly. The electrode tape includes a polymeric resin film having a melting point of at least 130° C. 1. A cylindrical secondary battery comprising:a jelly-roll type electrode assembly in which a first electrode, a second electrode and a separator interposed between the two electrodes are wound together, wherein an electrode tape comprising a polymeric resin film having a melting point of at least 130° C. is attached to at least one surface of an uncoated portion of the first electrode at a core of the jelly-roll type electrode assembly;a center pin inserted to penetrate the central portion of the jelly-roll type electrode assembly;a can accommodating the electrode assembly and the center pin;a cap assembly coupled to an upper opening of the can to seal the can; anda gasket interposed between the can and the cap assembly.2. The cylindrical secondary battery according to claim 1 , wherein the polymeric resin film having a melting point of at least 130° C. is made of at least one polymer selected from the group consisting of polyethylene terephthalate claim 1 , polyacrylonitrile claim 1 , polymethyl methacrylate claim 1 , polyamide claim 1 , polystyrene claim 1 , polytetrafluoroethylene claim 1 , polytetramethylene terephthalate claim 1 , polyvinyl alcohol ...

SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF

A secondary battery and a manufacturing method thereof are disclosed. In one embodiment, the battery includes an electrode assembly and a case accommodating the electrode assembly. The electrode assembly may include i) a first electrode plate comprising a first collector and a first active material layer formed on at least one side of the first collector, ii) a second electrode plate comprising a second collector and a second active material layer formed on at least one side of the second collector and iii) a separator interposed between the first and second electrode plates. In one embodiment, a plurality of pores are formed only in part of the first and second collectors.

BATTERY HAVING ENHANCED ELECTRICAL INSULATION CAPABILITY

Disclosed is a battery including a cathode in which cathode active-material coating layers provided on both surfaces of a cathode collector are longitudinally deviated from each other, and an anode having at least one anode active-material coating layer provided on an anode collector, the cathode and anode being wound to face each other with a separator interposed therebetween. At least one of a winding beginning portion and winding ending portion of the cathode is provided with a cathode uncoated part for installation of a cathode lead. An insulator tape is attached to the boundary of the cathode active-material coating layer at a position where the anode active-material coating layer faces a non-coating part of the cathode not containing the cathode active-material coating layer, achieving enhanced electrical insulation capability and consequential safety of the battery. 1. A battery comprising: a cathode having a cathode active-material coating layer provided on at least one surface of a cathode collector; and an anode having an anode active-material coating layer provided on at least one surface of an anode collector , the cathode and anode being wound to face each other with a separator interposed therebetween ,wherein the cathode active-material coating layer applied to the at least one surface of the cathode collector is longitudinally deviated from a cathode active-material coating layer applied to the other surface of the cathode collector such that application beginning and ending portions of both the cathode active-material coating layers are not consistent with each other, and only at least one of a winding beginning portion and winding ending portion of the cathode is provided with a cathode uncoated part for installation of a cathode lead, andwherein an insulator tape is attached to the boundary of the cathode active-material coating layer at a position where the anode active-material coating layer faces a non-coating part of the cathode not containing ...

NONAQUEOUS ELECTROLYTE BATTERY

It is an object of the present invention to provide a nonaqueous electrolyte battery in which a winding body is uniformly expanded, to thereby prevent undulation. A nonaqueous electrolyte battery () comprises a winding body () having a flattened shape, in which a positive electrode () and a negative electrode () are wound with separators () interposed therebetween, and a negative electrode tab () joined to the negative electrode (), extending in a winding axis direction of the winding body (). The positive electrode () includes a positive electrode current collector () having a strip-like shape, a first positive electrode mixture layer () formed on one surface of the positive electrode current collector (), and a second positive electrode mixture layer () formed on the other surface of the positive electrode current collector (), and a winding trailing end portion () of the first positive electrode mixture layer () is positioned on an inner side of the winding body () with respect to the negative electrode tab () in the width direction (x direction) and a winding trailing end portion () of the second positive electrode mixture layer () is positioned on an outer side of the winding body () with respect to the negative electrode tab () in the width direction (x direction). 17-. (canceled)8. A nonaqueous electrolyte battery comprising:a winding body having a flattened shape, in which a positive electrode and a negative electrode are wound with a separator interposed therebetween; anda negative electrode tab joined to said negative electrode, extending in a winding axis direction of said winding body,wherein said positive electrode includes a positive electrode current collector having a strip-like shape, a first positive electrode mixture layer formed on one surface of said positive electrode current collector, and a second positive electrode mixture layer formed on the other surface of said positive electrode current collector,a direction parallel to a main surface of ...

Method for manufacturing battery cell and battery cell manufactured using the same

Disclosed is a method for manufacturing a battery cell including an electrode assembly and electrolyte provided in a battery case composed of a laminate sheet having a resin layer and a metal layer, which includes; (a) thermally fusing and sealing the periphery of the case except for an end part thereof while the electrode assembly is mounted in the case; (b) introducing the electrolyte through the unsealed end part then sealing the same by thermal fusion; (c) charging and discharging the battery cell to activate the same; (d) puncturing the unsealed part inside the end part to form a through-hole communicating with the inside of the case; and (e) pulling top and bottom faces of the battery case in the opposite direction to each other at the unsealed part to open the same while applying vacuum pressure, to thereby remove the gas generated during activation as well as excess electrolyte.

INTEGRAL BATTERY TAB

One aspect of the present disclosure relates to a wound electromechanical storage device assembly including a negative electrode sheet, a plurality of negative electrode tabs which are integral to and extend from the negative electrode sheet, a positive electrode sheet, a plurality of positive electrode tabs which are integral to and extend from the positive electrode sheet, and a separator sheet disposed between the negative and positive electrode sheets, wherein the negative electrode sheet, positive electrode sheet, and separator sheet are wound around a common axis to form a plurality of windings, and wherein each winding includes one negative electrode tab and one positive electrode tab. 1. A wound electromechanical storage device assembly comprising:a negative electrode sheet;a plurality of negative electrode tabs which are integral to and extend from the negative electrode sheet;a positive electrode sheet;a plurality of positive electrode tabs which are integral to and extend from the positive electrode sheet; and wherein the negative electrode sheet, positive electrode sheet, and separator sheet are wound around a common axis to form a plurality of windings, and', 'wherein each winding comprises one negative electrode tab and one positive electrode tab., 'a separator sheet disposed between the negative and positive electrode sheets,'}2. The device of claim 1 , wherein each of the plurality of negative electrode tabs and the plurality of positive electrode tabs are aligned.3. The device of claim 1 , wherein the negative electrode sheet and the negative electrode tabs are both comprised of copper.4. The device of claim 1 , wherein the positive electrode sheet and the positive electrode tabs are both comprised of aluminum.5. The device of claim 1 , wherein the substantially concentric windings have a substantially cylindrical profile.6. The device of claim 1 , wherein the substantially concentric windings have a substantially prismatic profile.7. The device of ...

SECONDARY BATTERY OF EXCELLENT PRODUCTABILITY AND SAFETY

Disclosed is a secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case, wherein a plate-shaped insulating member is mounted on the top of the jelly-roll and the insulating member includes a perforated inlet enabling gas discharge and penetration of electrode terminals and a plurality of pores with a diameter of 100 μm or less provided over the entire surface of the insulating member. 1. A secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case ,wherein a plate-shaped insulating member is mounted on the top of the jelly-roll; andthe insulating member includes a perforated inlet enabling gas discharge and penetration of electrode terminals, and a plurality of pores with a diameter of 100 tun or less provided over the entire surface of the insulating member.2. The secondary battery according to claim 1 , wherein the insulating member is made of an electrically insulating polymer resin or an electrically insulating polymer composite.3. The secondary battery according to claim 2 , wherein the polymer resin is selected from the group consisting of polypropylene (PP) claim 2 , polystyrene (PS) claim 2 , polyethylene terephthalate (PET) claim 2 , a natural rubber and a synthetic rubber.4. The secondary battery according to claim 1 , wherein the insulating member has a non-woven structure.5. The secondary battery according to claim 1 , wherein the pores of the insulating member have a size allowing an electrolytic solution to pass through the pores when the electrolytic solution is injected.6. The secondary battery according to claim 5 , wherein the pores of the insulating member have a size of 10 μm to 100 μm.7. The secondary battery according to claim 1 , wherein the pores are spaced from one another by a predetermined distance over the entire surface of the insulating member.8. The secondary battery ...

PREPARATION PROCESS FOR PREVENTING DEFORMATION OF JELLY-ROLL TYPE ELECTRODE ASSEMBLY

Provided is a method for fabrication of a jelly-roll type electrode assembly having a cathode/separation membrane/anode laminate structure, including: (a) coating both sides of a porous substrate with organic/inorganic composite layers, each of which includes inorganic particles and an organic polymer as a binder, so as to fabricate a composite membrane; and (b) inserting one end of a sheet laminate comprising a cathode sheet and an anode sheet as well as the composite membrane into a mandrel, winding the sheet laminate around the mandrel, and then, removing the mandrel, wherein the organic/inorganic composite layer includes microfine pores capable of moderating a variation in volume during charge/discharge of a secondary battery and an interfacial friction coefficient between the composite membrane and the mandrel is not more than 0.28. 1. An organic/inorganic composite membrane for a secondary battery prepared by the method comprising:(i) dissolving an organic polymer, which is capable of inducing a binding force between inorganic particles and adhesion of the inorganic particles to a surface of a substrate, in a solvent to prepare a solution;(ii) adding the inorganic particles to the prepared solution to prepare an organic/inorganic coating solution;(iii) immersing a porous substrate in the coating solution through dip-coating, so as to form coating layers on both sides of the porous substrate; and(iv) removing the solvent to produce an organic/inorganic composite membrane having microfine pores,wherein the organic/inorganic composite membrane includes microfine pores capable of moderating a variation in volume during charge/discharge of the secondary battery, and the interfacial friction coefficient (μ) between the composite membrane and a mandrel used for manufacturing a jelly-roll type electrode assembly is not more than 0.28.2. A jelly-roll type electrode assembly having a cathode/separation membrane/anode laminate structure prepared by the method comprising ...

ELECTRIC VEHICLE PROPULSION SYSTEM AND METHOD UTILIZING SOLID-STATE RECHARGEABLE ELECTROCHEMICAL CELLS

A vehicle propulsion system comprising a plurality of solid state rechargeable battery cells configured to power a drivetrain is disclosed. In accordance with one aspect of the invention, a transportation system that is powered at least in part by electricity stored in the form of rechargeable electrochemical cells. According to an embodiment of the present invention, these cells are combined in series and in parallel to form a pack that is regulated by charge and discharge control circuits that are programmed with algorithms to monitor state of charge, battery lifetime, and battery health. 1. A system comprising a plurality of solid state rechargeable battery cells configured to power an appliance , the system comprising a stack of electrochemical cells , each electrochemical cell formed overlying the surface of a substrate , said electrochemical cell having an overall thickness of less than 50 microns , said electrochemical cell comprising: a substrate less than 10 microns in thickness along a shortest axis , the substrate comprising a surface region; a positive electrode material comprised of a transition metal oxide or a transition metal phosphate , the positive electrode material characterized by a thickness between 0.5 micron and 50 microns; a solid state layer of a ceramic , polymer , or glassy material configured for conducting lithium or magnesium ions during a charge and discharge process , the solid state layer characterized by a thickness between 0.1 micron and 5 microns; a negative electrode material configured for electrochemical insertion or plating of ions during the charge and discharge process , the negative electrode material characterized by a thickness between 0.5 micron and 50 microns; and an electrically conductive material coupled with the positive electrode material and free from contact with the negative electrode material , wherein said layers of positive and negative electrode materials each has a total surface area greater than 0.5 ...

LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME

A lithium secondary battery and a method for producing the lithium secondary battery. The lithium secondary battery includes a negative electrode in which negative electrode mixture layers and that contain active material particles containing silicon and/or a silicon alloy and a binder are disposed on the surfaces of a current collector . A electrode body is formed by spirally winding, from inside to outside, a laminate body; and in an outer end portion of the negative electrode , the negative electrode mixture layers and have tapering portions and whose thicknesses decrease toward ends and of the negative electrode mixture layers and ; and oozing portions and mainly containing the binder are formed at the tips of the tapering portions and of the negative electrode mixture layers and 17-. (canceled)8. A lithium secondary battery comprising a negative electrode in which a negative electrode mixture layer that contains active material particles containing silicon and/or a silicon alloy and a binder is disposed on a surface of a current collector; a positive electrode; a separator disposed between the negative electrode and the positive electrode; a non-aqueous electrolyte; and a casing that houses the negative electrode , the positive electrode , the separator , and the non-aqueous electrolyte ,wherein an electrode body formed by spirally winding, from inside to outside, a laminate body in which the negative electrode, the separator, and the positive electrode are stacked is housed in the casing,in an outer end portion of the negative electrode, the negative electrode mixture layer has a tapering portion whose thickness decreases toward an end of the negative electrode mixture layer; and an oozing portion mainly containing the binder is formed at a tip of the tapering portion of the negative electrode mixture layer.9. The lithium secondary battery according to claim 8 , wherein a negative electrode tab is disposed on the current collector in a region not containing ...

Rechargeable battery

A rechargeable battery that includes an electrode assembly, a case having an inner space and receiving the electrode assembly, and a protective circuit module mounted with a protective element controlling charge and discharge of the electrode assembly, wherein the protective circuit module includes a circuit board installed with the protective element and a metal part fixed to the circuit board and combined to the case.

ENERGY STORAGE DEVICE

An energy storage device includes an electrode unit in which a cathode having a cathode lead, an anode having an anode lead, and a separator located between the cathode and the anode to separate the cathode and the anode from each other are rolled together; a housing receiving the electrode unit; an electrolyte filled in the housing; an inner terminal arranged in the housing to face the electrode unit; and an outer terminal connected to the inner terminal. A groove is formed in a side of the inner terminal, and a side protrusion is formed on an inner wall of the housing at a location corresponding to the groove. 1. An energy storage device , comprising:an electrode unit in which a cathode having a cathode lead, an anode having an anode lead, and a separator located between the cathode and the anode to separate the cathode and the anode from each other are rolled together;a housing receiving the electrode unit;an electrolyte filled in the housing;an inner terminal arranged in the housing to face the electrode unit;an outer terminal connected to the inner terminal; anda pressure relief unit for relieving an inner pressure of the housing,wherein a groove is formed in a side of the inner terminal, and a side protrusion is formed on an inner wall of the housing at a location corresponding to the groove,wherein openings are respectively formed in the inner terminal and the outer terminal for the communication with the outside, andwherein the pressure relief unit is installed in the openings and selectively opens the openings in association with the change of the inner pressure of the housing when the inner pressure is increased over an allowable level.2. The energy storage device according to claim 1 , wherein the electrode unit is coupled with the inner terminal by laser welding.3. The energy storage device according to claim 1 , wherein the side protrusion is formed by partially denting the side of the housing.4. The energy storage device according to claim 1 , wherein ...

THREE DIMENSIONAL SHAPED BATTERY

A three-dimensional shaped battery includes a cell structure including a first electrode layer, a second electrode layer, and a separation layer disposed between the first electrode layer and the second electrode layer, where the cell structure may include a plurality of pattern units having different sizes from each other and a connecting portion which connects the pattern units to each other. 1. A three-dimensional shaped battery comprising: a first electrode layer;', 'a second electrode layer; and', 'a separation layer disposed between the first electrode layer and the second electrode layer,, 'a cell structure comprising a plurality of pattern units having different sizes from each other; and', 'a connecting portion which connects the pattern units to each other., 'wherein the cell structure further comprises2. The three-dimensional shaped battery of claim 1 , wherein the connecting portion is bent or folded such that the pattern units are stacked to face each other.3. The three-dimensional shaped battery of claim 2 , wherein areas of the pattern units are gradually changed in a direction in which the pattern units are stacked.4. The three-dimensional shaped battery of claim 2 , wherein an intermediate portion in the stacked pattern units has an area greater than areas of other portions in the stacked pattern units.5. The three-dimensional shaped battery of claim 2 , wherein an intermediate portion in the stacked pattern units has an area less than areas of other portions in the stacked pattern units.6. The three-dimensional shaped battery of claim 2 , wherein a hole is defined in the pattern units.7. The three-dimensional shaped battery of claim 6 , wherein the hole is defined in each of the pattern units at a portion corresponding to each other in the stacked pattern units.8. The three-dimensional shaped battery of claim 1 , wherein an inclination surface is defined by end portions of the pattern units in the cell structure.9. The three-dimensional shaped ...

ENERGY STORAGE DEVICE, WINDING APPARATUS, AND WINDING METHOD

Provided is an energy storage device which employs the use of a separator provided with a layer having poor thermal properties such as a heat resistant coated layer and is capable of inhibiting a decrease in performance. The energy storage device includes: a wound body including a positive electrode, a negative electrode, and separators which are layered and wound, the separators being interposed between the positive electrode and the negative electrode and having a first surface and a second surface, the first surface having thermal bonding properties superior to thermal bonding properties of the second surface; and an insulation sheet wound around an outermost layer of the wound body. At least one of the separators is bonded to the insulation sheet via the first surface thereof. 1. An energy storage device comprising:a wound body including a positive electrode, a negative electrode, and a separator which are layered and wound, the separator being interposed between the positive electrode and the negative electrode and having a first surface and a second surface, the first surface having thermal bonding properties superior to thermal bonding properties of the second surface; andan insulation sheet wound around an outermost layer of the wound body,wherein the separator is bonded to the insulation sheet via the first surface thereof.2. The energy storage device according to claim 1 , comprisingtwo of the separators,wherein the separators are bonded together via the first surfaces thereof, and the first surface of one of the separators is bonded to the insulation sheet.3. The energy storage device according to claim 1 ,wherein the first surface of the separator is bonded to the insulation sheet in a state in which an end portion of the insulation sheet is sandwiched by the separator.4. The energy storage device according to claim 2 ,wherein the first surface of each of the separators is bonded to the insulation sheet in a state in which an end portion of the ...

ELECTRODE ASSEMBLY

An electrode assembly and a battery are provided. The electrode assembly may be effectively fixed inside a can as a pressure-sensitive adhesive tape attached to an outer circumferential surface of the electrode assembly is formed into a 3D shape by an electrolyte. Thus, the electrode assembly does not move and rotate inside the can due to external vibration or impact and damage of welded regions of a tab or disconnection of inner circuits can be prevented. 1. An electrode assembly having a pressure-sensitive adhesive tape attached to an outer circumferential surface thereof ,wherein the pressure-sensitive adhesive tape comprises:a substrate layer deforming in a longitudinal direction when coming in contact with an electrolyte; anda pressure-sensitive adhesive layer formed on one surface of the substrate layer in a direction parallel to the longitudinal direction of the substrate layer.2. The electrode assembly of claim 1 , further comprising:a positive electrode plate;a negative electrode plate; anda separator formed between the positive electrode plate and the negative electrode plate.3. The electrode assembly of claim 2 , which is wound in a jelly-roll shape.4. The electrode assembly of claim 1 , wherein the pressure-sensitive adhesive tape is formed into a three-dimensional (3D) structure having a height of 0.001 mm to 2.0 mm in a direction vertical to the longitudinal direction when the pressure-sensitive adhesive tape comes in contact with the electrolyte.5. The electrode assembly of claim 1 , wherein the substrate layer has a strain of 10% or more in the longitudinal direction according to the following Equation 1:{'br': None, 'i': L', '−L', 'L, 'sub': 2', '1', '1, 'Strain in longitudinal direction=()/×100\u2003\u2003Equation 1'}{'sub': '1', 'wherein Lis an initial length of the substrate layer before the substrate layer comes in contact with the electrolyte; and'}{'sub': '2', 'Lis a length of the substrate layer, which is measured after the substrate layer ...

LITHIUM ION SECONDARY BATTERY

A lithium ion secondary battery is disclosed in which an electrode assembly is accommodated in a battery container, the electrode assembly including a positive electrode having a positive electrode mixture layer containing a lithium transition metal composite oxide, a negative electrode having a negative electrode mixture layer for occluding/releasing lithium ions, and a separator disposed to inner and outer peripheries of the positive electrode and the negative electrode. The lithium ion secondary battery being charged with a non-aqueous electrolyte containing a lithium salt, wherein the relation shown by the following formula (I) is satisfied: 2. The lithium ion secondary battery according to claim 1 , whereinthe electrode assembly has a cylindrical shape and the area of the separator includes an area of a preceding winding region and an area of a succeeding winding region.3. The lithium ion secondary battery according to claim 1 , whereinthe separator has a porosity of 43 to 50.4. The lithium ion secondary battery according to claim 1 , whereinthe separator has a porosity of 45 to 50.5. The lithium ion secondary battery according to claim 1 , whereinthe separator has a thickness of 18 to 25 μm.6. The lithium ion secondary battery according to claim 2 , whereinthe separator has a porosity of 43 to 50.7. The lithium ion secondary battery according to claim 2 , whereinthe separator has a porosity of 45 to 50.8. The lithium ion secondary battery according to claim 2 , whereinthe separator has a thickness of 18 to 25 μm.9. The lithium ion secondary battery according to claim 3 , whereinthe separator has a thickness of 18 to 25 μm.10. The lithium ion secondary battery according to claim 4 , whereinthe separator has a thickness of 18 to 25 μm. The present invention relates to a lithium ion secondary battery. More specifically, the invention relates to a lithium ion secondary battery capable of improving output characteristics.In lithium ion secondary batteries, ...

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Provided is a non-aqueous electrolyte secondary battery including: a plurality of electrode groups each formed by winding a positive electrode, a negative electrode, and a separator into a flat shape; a non-aqueous electrolyte; and a prismatic case accommodating the electrode groups and the non-aqueous electrolyte. The case has a rectangular cross-sectional shape. The electrode groups are accommodated in the case such that lateral directions of the cross-sectional shapes of the electrode groups are each perpendicular to the lateral direction of the cross-sectional shape of the case, and the axis directions of the electrode groups are each parallel with the height direction of the case. 1. A non-aqueous electrolyte secondary battery comprising: a plurality of flat electrode groups , a non-aqueous electrolyte , and a prismatic case accommodating the electrode groups and the non-aqueous electrolyte ,the electrode groups each including a positive electrode, a negative electrode, and a separator, the positive electrode, the negative electrode, and the separator being wound into a flat shape,the case has a rectangular cross-sectional shape, andthe electrode groups being accommodated in the case such that lateral directions of cross-sectional shapes of the electrode groups are each perpendicular to a lateral direction of the cross-sectional shape of the case, and axis directions of the electrode groups are each parallel with a height direction of the case, andat least one of the electrode groups being different from another one of the electrode groups in terms of the length in the lateral direction of the cross-sectional shape.2. The non-aqueous electrolyte secondary battery according to claim 1 , wherein at least two of the electrode groups are connected in parallel with each other.3. The non-aqueous electrolyte secondary battery according to claim 1 , wherein at least two of the electrode groups are connected in series with each other.4. The non-aqueous electrolyte ...

ELECTRODE ASSEMBLY AND COMPOSITE ELECTRODE ASSEMBLY OF STAIR-LIKE STRUCTURE

Disclosed herein are an electrode assembly and a composite electrode assembly mounted in a battery case of a secondary battery. The electrode assembly and the composite electrode assembly have a stair-like structure. The stair-like structure is formed based on the curvature of a device to utilize a dead space of the device, thereby improving the capacity of the device per unit volume. 1. An electrode assembly comprising:two or more electrode plates, each of which has electrode tabs; anda one-unit sheet type separation film to cover one major surface and the other major surface of each of the electrode plates and side surfaces of the electrode plates, which constitute an electrode tab non-formation region, whereinthe electrode plates are stacked in a height direction on the basis of a plane such that the electrode plates having opposite polarities face each other in a state in which the separation film is disposed between the electrode plates, andthe electrode plates comprise one or more electrode plates and one or more other electrode plates having the same size as or different sizes from the one or more electrode plates, and a stack structure of the electrode groups having different sizes forms a stair-like structure comprising one or more steps, each having a width and a height.2. The electrode assembly according to claim 1 , wherein the electrode plates having opposite polarities are stacked in a state in which a separation film is disposed between the electrode plates in a direction opposite to the height direction symmetrically or asymmetrically to the electrode plates stacked in the height direction on the basis of the plane.3. The electrode assembly according to claim 1 , wherein a separator plate and an electrode plate are added to a portion or the entirety of the electrode plates to form a unit cell configured to have a structure in which the electrode plates having opposite polarities are alternately stacked in a stacked direction of the electrode plates ...

ELECTRIC STORAGE DEVICE, AND METHOD FOR PRODUCING THE SAME

An electric storage device according to the present invention is provided with a flat electrode assembly in which a positive electrode plate and a negative electrode plate are wound while being isolated from each other, and which includes a pair of folded-back portions opposed to each other with a center line therebetween and a flat portion positioned between the pair of folded-back portions; and a case for housing the electrode assembly, the case including, on an inner surface thereof, a raised portion having direct or indirect contact externally with a boundary region between one of the pair of folded-back portions and the flat portion of the electrode assembly, wherein a maximum external length of the folded-back portion in a direction orthogonal to the flat portion is greater than an external length of the boundary region in a direction orthogonal to the flat portion at a position thereof with which the raised portion has contact. 1. An electric storage device comprising:a flat electrode assembly in which a positive electrode plate and a negative electrode plate are wound while being isolated from each other, and which includes a pair of folded-back portions opposed to each other with a center line of the electrode assembly therebetween and a flat portion positioned between the pair of folded-back portions; anda case for housing the electrode assembly, the case including, on an inner surface thereof, a raised portion having direct or indirect contact externally with a boundary region between one of the pair of folded-back portions and the flat portion of the electrode assembly,wherein a maximum external length of the folded-back portion in a direction orthogonal to the flat portion is greater than an external length of the boundary region in a direction orthogonal to the flat portion at a position thereof with which the raised portion has contact.2. The electric storage device according to claim 1 , wherein the case includes a recessed portion on an outer ...

SECONDARY BATTERY

A negative electrode active material layer () of a lithium-ion secondary battery () has a region () facing a positive electrode active material layer () and regions (), () not facing the positive electrode active material layer (). Therein, the equilibrium potential Ea of the region () facing the positive electrode active material layer () is higher than the equilibrium potential Eb of the regions (), () not facing the positive electrode active material layer () (Ea>Eb). 1. A secondary battery comprising:a positive electrode current collector;a positive electrode active material layer retained on the positive electrode current collector;a negative electrode current collector;a negative electrode active material layer retained on the negative electrode current collector and covering the positive electrode active material layer; anda separator interposed between the positive electrode active material layer and the negative electrode active material layer, whereinthe negative electrode active material layer comprises a region facing the positive electrode active material layer and a region not facing the positive electrode active material layer, the region facing the positive electrode active material layer having an equilibrium potential Ea and the region not facing the positive electrode active material layer having an equilibrium potential Eb, and the equilibrium potential Ea is higher than the equilibrium potential Eb (Ea>Eb).2. The secondary battery according to claim 1 , wherein in the negative electrode active material layer claim 1 , the region facing the positive electrode active material layer and the region not facing the positive electrode active material layer comprise different negative electrode active materials.3. The secondary battery according to claim 1 , wherein the equilibrium potential Ea is higher than the equilibrium potential Eb (Ea>Eb) at least when the secondary battery is within the range of state of charge in which the secondary battery can ...

ELECTRODE ASSEMBLY, FABRICATING METHOD THEREOF, AND RECHARGEABLE BATTERY

A spirally-wound electrode assembly includes: a first electrode and a second electrode; a separator interposed between the first electrode and the second electrode; and a connection portion fixing first ends of portions of the separator, and the first electrode is adjacent to the connection portion and is between the portions of the separator. A rechargeable battery including a spirally-wound electrode assembly, and a method of manufacturing an electrode assembly are also provided. 1. A spirally-wound electrode assembly comprising:a first electrode and a second electrode;a separator interposed between the first electrode and the second electrode; anda connection portion fixing first ends of portions of the separator,wherein the first electrode is adjacent to the connection portion and is between the portions of the separator.2. The electrode assembly of claim 1 , wherein the connection portion is integrally formed with the separator.3. The electrode assembly of claim 1 , wherein the connection portion is formed by fusion of the portions of the separator.4. The electrode assembly of claim 1 , wherein the connection portion comprises an adhesive material that fixes the first ends of the portions of the separator.5. The electrode assembly of claim 1 , wherein the connection portion surrounds a first end of the first electrode.6. The electrode assembly of claim 1 , wherein the connection portion is fixed by the portions of the separator contacting each other.7. A rechargeable battery comprising:a spirally-wound electrode assembly including a separator interposed between a first electrode and a second electrode;a case containing the electrode assembly; anda cap assembly covering an opening of the case,wherein the electrode assembly comprises a connection portion fixing first ends of portions of a separator that are adjacent to opposite sides of the first electrode.8. The rechargeable battery of claim 7 , wherein the first electrode is adjacent to the connection portion ...

CYLINDRICAL SECONDARY BATTERY OF IMPROVED SAFETY

Disclosed herein is a secondary battery having a jelly roll type electrode assembly (‘jelly roll’) of a cathode/separator/anode structure mounted in a battery container, wherein a seal tape is attached to an outer side of the jelly roll including a wound end of the jelly roll, and the seal tape reacts with an electrolyte with the result that the seal tape is gelled. 1. A secondary battery having a jelly roll type electrode assembly (‘jelly roll’) of a cathode/separator/anode structure mounted in a battery container , wherein a seal tape is attached to an outer side of the jelly roll comprising a wound end of the jelly roll , and the seal tape reacts with an electrolyte with the result that the seal tape is gelled.2. The secondary battery according to claim 1 , wherein the battery container is a cylindrical container.3. The secondary battery according to claim 1 , wherein the seal tape has a size equivalent to 50 to 90% of a length of an outer circumference of the jelly roll.4. The secondary battery according to claim 1 , wherein the seal tape comprises a tape-shaped film substrate and an adhesive layer applied to a side of the film substrate contacting the jelly roll claim 1 , and the film substrate is gelled.5. The secondary battery according to claim 4 , wherein the film substrate has a thickness of 10 to 30 μm claim 4 , and the adhesive layer has a thickness of 2 to 10 μm.6. The secondary battery according to claim 5 , wherein the adhesive layer is formed of an acryl adhesive or a styrene butadiene rubber (SBR) adhesive.7. The secondary battery according to claim 4 , wherein claim 4 , when the seal tape is impregnated with the electrolyte claim 4 , a physical property of the film substrate is changed into a form exhibiting adhesiveness.8. The secondary battery according to claim 7 , wherein movement of the jelly roll in the battery container is prevented by adhesiveness of the film substrate according to gelling of the film substrate.9. The secondary battery ...

MANDREL FOR PREPARATION OF JELLY-ROLL TYPE ELECTRODE ASSEMBLY

Disclosed herein is a mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly using a long sheet type stack of a cathode/separator/anode structure, wherein the mandrel is oval in a section perpendicular to a rotational central axis of the mandrel, a length ratio of a major axis to a minor axis of the mandrel being 1.5 or more, and a tilt of an outer side of the mandrel is continuously changed from an end of the minor axis of the mandrel to an end of the major axis of the mandrel in the section perpendicular to the rotational central axis of the mandrel. 1. A mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly using a long sheet type stack of a cathode/separator/anode structure , whereinthe mandrel is oval in a section perpendicular to a rotational central axis of the mandrel, a length ratio of a major axis to a minor axis of the mandrel being 1.5 or more, anda tilt of an outer side of the mandrel is continuously changed from an end of the minor axis of the mandrel to an end of the major axis of the mandrel in the section perpendicular to the rotational central axis of the mandrel in such a manner that the mandrel is configured to have an oval structure so as to reduce wound stress applied front the end of the major axis of the mandrel to the sheet type stack during constant speed rotation of the mandrel when the sheet type stack is wound on the mandrel in a state in which an end of the sheet type stack is fitted in a central region of the mandrel.2. The mandrel according to claim 1 , wherein the length ratio of the major axis to the minor axis of the mandrel is 1.5 to 4.3. The mandrel according to claim 1 , wherein the mandrel is divided into a first mandrel part located at one side of the central region of the mandrel claim 1 , in which the end of the sheet type stack is fitted claim 1 , and a second mandrel part located at the other side of the central region of ...

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

The nonaqueous electrolyte secondary battery includes a wound electrode body in which a positive and a negative electrode plates are wound with a separator therebetween and an air gap portion is formed at the winding axis center. A negative electrode collector tab is joined to a negative electrode exposed portion on the winding start side. This collector tab is bent so as to be touched and joined to the inside bottom portion of a battery exterior can at the position corresponding to the air gap portion. In a plan view, the air gap portion of is formed in a shape having an arc portion and a chord portion. In a plan view, the negative electrode collector tab is made to be linear along the chord portion of the negative electrode exposed portion on the winding start side, and is joined to the negative electrode exposed portion at this chord portion. 1. A nonaqueous electrolyte secondary battery comprising:a wound electrode assembly in which a positive electrode plate having a positive electrode mixture layer formed on both surfaces of a positive electrode substrate and a negative electrode plate having a negative electrode mixture layer on both surfaces of a negative electrode substrate with a separator interposed therebetween, and an air gap portion is formed at the winding axis center, one electrode plate of the positive electrode plate and the negative electrode plate having a substrate exposed portion formed on the winding start side thereof, and the substrate exposed portion on the winding start side being joined to a first collector tab, the wound electrode assembly being enclosed together with a nonaqueous electrolyte in a battery outer can, and the battery outer can being sealed by a sealing plate, the first collector tab being bent and joined so as to touch an inside bottom portion of the battery outer can at a position corresponding to the air gap portion of the wound electrode assembly, the other electrode plate of the positive electrode plate and the ...

Lithium-Ion Battery

The present invention provides a cylindrical lithium-ion secondary battery. The lithium-ion battery of the present invention has a structure in which the value of B/A is optimized, where the distance between an electrode pole to which strip-form lead pieces are welded, the lead pieces being formed intermittently in the winding direction, which is the longitudinal direction of the belt-like electrodes, and the inner wall of the battery can is represented by A, and the distance between the electrode pole and the wound electrode group is represented by B, in order to secure an exhaust passage for the gas generated upon occurrence of an abnormality in the battery. 1. A lithium-ion battery comprising:a wound electrode group, the wound electrode group being formed by winding a positive electrode having a negative electrode active material layer formed on a surface thereof, a separator that retains an electrolyte, and a negative electrode having a positive electrode active material layer formed on a surface thereof, around an axial core;an electrode pole arranged between the wound electrode group and a battery terminal, the electrode pole being configured to contribute to an electrical connection between the wound electrode group and the battery terminal; andlead pieces formed in strip form on an active-material-non-applied portion provided on a side of each of the positive electrode and the negative electrode, the lead pieces being electrically connected to the electrode pole,wherein the wound electrode group, the electrode pole, and the lead pieces are housed in a battery can, anda value of B/A is 1.4 to 2.6, where a distance from an inner wall of the battery can to the electrode pole is A, and a distance from the wound electrode group to the electrode pole is B.2. The lithium-ion battery according to claim 1 , wherein the value of the B/A is 1.6 to 2.0.3. The lithium-ion battery according to claim 1 , further comprising a gap between the wound electrode group and the ...

LITHIUM-ION RECHARGEABLE BATTERY ANODE, LITHIUM-ION RECHARGEABLE BATTERY UTILIZING THE LITHIUM-ION RECHARGEABLE BATTERY ANODE, AND MANUFACTURING METHOD THEREOF

A lithium-ion rechargeable battery, and an anode for a lithium-ion rechargeable battery containing an anode mix layer including a high density anode mix layer formed over an anode current collector, and a low density anode mix layer formed over the high density anode mix layer; and in which the electrode density of the high density anode mix layer is larger than the electrode density of the low density anode mix layer, the upper surface and the side surfaces of the high density anode mix layer are covered by the low density anode mix layer; and the film thickness of the high density anode mix layer is 50 percent or less than the film thickness of the anode mix layer. 1. An anode for a lithium-ion rechargeable battery including an anode mix layer comprising:a high density anode mix layer formed over an anode current collector; anda low density anode mix layer formed over the high density anode mix layer,wherein the electrode density of the high density anode mix layer is larger than the electrode density of the low density anode mix layer, and the upper surface and the side surfaces of the high density anode mix layer are covered by the low density anode mix layer.2. The anode for a lithium-ion rechargeable battery according to claim 1 ,wherein the film thickness of the high density anode mix layer is 50% or less than the film thickness of anode mix layer.3. The anode for a lithium-ion rechargeable battery according to claim 1 ,wherein the high density anode mix layer is formed in a line shape over the anode current collector.4. The anode for a lithium-ion rechargeable battery according to claim 3 ,wherein the composition of the high density anode mix layer is the same composition as the low density anode mix layer.5. The anode for a lithium-ion rechargeable battery according to claim 4 ,wherein the percentage occupied by the width of the high density anode mix layer is 60% or less than the width of the anode mix layer.6. The anode for a lithium-ion rechargeable ...

MANDREL FOR PREPARATION OF JELLY-ROLL TYPE ELECTRODE ASSEMBLY

Disclosed herein is a mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly using a long sheet type stack of a cathode/separator/anode structure, wherein the mandrel is oval in a section perpendicular to a rotational central axis of the mandrel and is divided into a first mandrel part located at one side of a central region of the mandrel, in which an end of the sheet type stack is fixedly fitted, and a second mandrel part located at the other side of the central region of the mandrel, and the first mandrel part and the second mandrel part each include a main body part having a region in which the sheet type stack is fitted in an engaged state and an exchange part, detachably mounted to the main body part, having an end of a major axis of the mandrel. 1. A mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly using a long sheet type stack of a cathode/separator/anode structure , whereinthe mandrel is oval in a section perpendicular to a rotational central axis of the mandrel and is divided into a first mandrel part located at one side of a central region of the mandrel, in which an end of the sheet type stack is fixedly fitted, and a second mandrel part located at the other side of the central region of the mandrel, andthe first mandrel part and the second mandrel part each comprise a main body part having a region in which the sheet type stack is fitted in an engaged state and an exchange part, detachably mounted to the main body part, having an end of a major axis of the mandrel.2. The mandrel according to claim 1 , wherein the main body part comprises fastening parts formed at a front region and a rear region with respect to the rotational central axis of the mandrel in a state in which the fastening parts protrude forward and rearward so that the fastening parts can be mounted to a mandrel rotation device.3. The mandrel according to claim 1 , wherein the ...

Rechargeable battery

A rechargeable battery, including an electrode assembly having a first electrode plate, a second electrode plate, and a separator, a first terminal electrically connected to the first electrode plate, a case accommodating the electrode assembly and the first terminal, and a cap assembly sealing the case. The first terminal includes a first collector plate in the case electrically connected to the first electrode plate of the electrode assembly, a first electrode terminal exposed to a top surface of the cap assembly, the first electrode terminal having a first terminal hole passing through a top and bottom surface of the first electrode terminal, and a first connection terminal having a first side electrically connected to the first electrode terminal and a second side electrically connected to the first collector plate, the first connection terminal having a first fuse hole at the first side.

LITHIUM ION SECONDARY BATTERY

A lithium ion secondary battery in which a winding type electrode group including a positive electrode having a positive electrode mix layer containing a lithium metal oxide, a negative electrode having a negative mix layer that stores and discharges lithium ions, and separators arranged on inner and outer peripheries of the positive electrode and the negative electrode is housed, and a nonaqueous electrolyte is poured, within a battery container, the positive electrode has one side edge along a longitudinal direction thereof exposed as a positive electrode mix unprocessed portion, and a positive electrode mix layer coated in the other area on both surfaces of a metal foil made of an aluminum alloy. 16-. (canceled)9. The lithium ion secondary battery according to claim 7 , wherein a ratio of the width a of the continuous area portion of the positive electrode mix unprocessed portion and the width b of the positive electrode mix layer satisfies 0.01≦(a/b)≦0.09.10. The lithium ion secondary battery according to claim 8 , wherein a ratio of the width a of the continuous area portion of the positive electrode mix unprocessed portion and the width b of the positive electrode mix layer satisfies 0.01≦(a/b)≦0.09.11. The lithium ion secondary battery according to claim 7 , wherein a ratio of the width a of the continuous area portion of the positive electrode mix unprocessed portion and the width b of the positive electrode mix layer satisfies 0.03≦(a/b)≦0.09.12. The lithium ion secondary battery according to claim 8 , wherein a ratio of the width a of the continuous area portion of the positive electrode mix unprocessed portion and the width b of the positive electrode mix layer satisfies 0.03≦(a/b)≦0.09.137. The lithium ion secondary battery according claim 8 , wherein a thickness of the metal foil is 10 to 20 μm.14. The lithium ion secondary battery according to claim 13 , wherein the winding type electrode group is a cylindrical claim 13 , and the positive electrode mix ...

Lithium Secondary Battery

The purpose of the present invention is to examine a novel core material for a lithium secondary battery and to provide a battery in which there is minimal variation from initial battery characteristics over time during long-term storage of the battery. In order to enhance the high-temperature storage characteristics of a lithium battery, a resin composed primarily of a cellulose-containing polypropylene is used as a winding core material.

CYLINDRICAL CELL

A cylindrical cell is disclosed. A poles pass through a cover plates, and an insulating material is used to separate the poles from the cover plates; the poles at the anode and the cathode are respectively fixedly connected to a conductor junction plates at the anode and the cathode; a sealable injection hole is arranged on the cover plates; a hollow cylinder is fixedly connected to the cover plates; the hollow cylinder is sleeved in through holes of the conductor junction plates; a roll cores are distributed around the hollow cylinder; tabs are arranged at the anode and the cathode of roll core, and the tabs at the anode and the cathode of the roll core are fixedly connected to the upper and lower conductor junction plates; the upper and lower conductor junction plates are respectively connected to the cover plates at the anode and the cathode of the cell. 1. A cylindrical cell , comprising:a housing, at least one hollow cylinder, at least two roll cores, upper and lower conductor junction plates, upper and lower cover plates, two poles at an anode and a cathode, and an injection hole, wherein:the poles pass through the cover plates, and an insulating material is used to separate the poles from the cover plates;the poles at the anode and the cathode are respectively fixedly connected to the conductor junction plates at the anode and the cathode;the sealable injection hole is arranged on the cover plates;the hollow cylinder is fixedly connected to the cover plates; andthe hollow cylinder is sleeved in through holes of the conductor junction plates;the roll cores are distributed around the hollow cylinder; andtabs are arranged at the anode and the cathode of each roll core, and the tabs at the anode and the cathode of the roll core are fixedly connected to the upper and lower conductor junction plates;the upper and lower conductor junction plates are respectively connected to the cover plates at the anode and the cathode of the cell; andthe cover plates at the anode ...

SECONDARY BATTERY

A secondary battery including a first electrode assembly including first and second electrode plates stacked on each other; and a second electrode assembly including third and fourth electrode plates, wherein the second electrode assembly is wound along an outer circumference of the first electrode assembly. The secondary battery having a high energy density and capable of preventing damage of the electrode plates may be provided. 1. A secondary battery , comprising:a first electrode assembly including first and second electrode plates stacked on each other; anda second electrode assembly including third and fourth electrode plates, wherein the second electrode assembly is wound along an outer circumference of the first electrode assembly.2. The secondary battery of claim 1 , wherein the first electrode assembly further comprises a first separator interposed between the first and second electrode plates claim 1 , and the second electrode assembly further comprises a second separator wound together with the third and fourth electrode plates.3. The secondary battery of claim 2 , wherein the second separator forms an innermost turn in the second electrode assembly to surround the outer circumferential surface of the first electrode assembly claim 2 , and the third electrode plate and the fourth electrode plate are sequentially disposed on the outside of the second separator claim 2 , wherein the second electrode assembly further comprises a third separator interposed between the third and fourth electrode plates.4. The secondary battery of claim 1 , wherein the electrode plates facing each other of the first electrode assembly and the second electrode assembly have opposite polarities.5. The secondary battery of claim 4 , wherein the second electrode plates are disposed on both outer sides of the first electrode assembly claim 4 , and the third electrode plate disposed adjacent to and outside of the second separator that forms an innermost turn of the second electrode ...

ELECTRIC STORAGE APPARATUS AND METHOD OF MANUFACTURING ELECTRIC STORAGE APPARATUS

adjacent to the reaction area of the power-generating element, in a state in which a portion of the collector plate of the electrode plate is wound in layers, is connected to the electrode terminal, the active material layer being not formed on the portion. The power-generating element has a bent portion provided by folding back the electrode plate and a cut portion at a position adjacent to the bent portion and formed by cutting a portion of the connecting region. The electrode terminal is fixed to the cut portion. 1. An electric storage apparatus comprising:a power-generating element in which electrode plates are wound with a separator interposed between them, each of the electrode plates having a collector plate and an active material layer formed on a portion of the collector plate, the power-generating element having a reaction area where charge and discharge reactions occur;a case accommodating the power-generating element; andan electrode terminal connected to the power-generating element,wherein a connecting region adjacent to the reaction area of the power-generating element, in a state in which a portion of the collector plate of the electrode plate is wound in layers, is connected to the electrode terminal, the active material layer being not formed on the portion,the power-generating element has a bent portion provided by folding back the electrode plate and a cut portion at a position adjacent to the bent portion and formed by cutting a portion of the connecting region without changing a length of the power-generating element in a circumferential thereof, andthe electrode terminal is fixed to the cut portion.2. The electric storage apparatus according to claim 1 , wherein the electrode terminal is inserted in the collector plate at the cut portion.3. The electric storage apparatus according to claim 1 , wherein the electrode terminal is placed at a position adjacent to the collector plate wound in the layers in the cut portion.4. The electric storage ...

CABLE-TYPE SECONDARY BATTERY

The present invention relates to a cable-type secondary battery having a horizontal cross section of a predetermined shape and extending longitudinally, comprising: an inner electrode having an inner current collector and an inner electrode active material layer surrounding the outer surface of the inner current collector; a separation layer surrounding the outer surface of the inner electrode to prevent a short circuit between electrodes; and an outer electrode surrounding the outer surface of the separation layer, and having an outer electrode active material layer, an open-structured outer current collector and a conductive paste layer. 1. A cable-type secondary battery having a horizontal cross section of a predetermined shape and extending longitudinally , comprising:an inner electrode having an inner current collector and an inner electrode active material layer surrounding the outer surface of the inner current collector;a separation layer surrounding the outer surface of the inner electrode to prevent a short circuit between electrodes; andan outer electrode surrounding the outer surface of the separation layer, and having an outer electrode active material layer, an open-structured outer current collector and a conductive paste layer.2. The cable-type secondary battery according to claim 1 , wherein the open-structured outer current collector is in the form of a wound wire claim 1 , a wound sheet or a mesh.3. The cable-type secondary battery according to claim 1 , wherein in the outer electrode claim 1 ,the outer electrode active material layer is formed to surround the outer surface of the separation layer, the open-structured outer current collector is formed to surround the outer surface of the outer electrode active material layer, and the conductive paste layer is formed to surround the outer surface of the open-structured outer current collector;the outer electrode active material layer is formed to surround the outer surface of the separation layer, ...

Power supply device, vehicle and electric power storage device including power supply device, and battery cell

A power supply device includes a battery block that includes battery cells, and fasteners that securely hold the battery block. Each of the cells includes an exterior container, a wound electrode, a sealing plate, and a connector. The container has a rectangular exterior shape, and opens on one face. The electrode includes electrode and separator sheets that are wound so that the electrode and separator sheets are alternately superposed on each other. The sealing plate closes the opening of the container. The connector is fastened to the sealing plate and electrically connected to the electrode. The electrode has a thickness smaller than the opening width of the container. The electrode is suspended by connectors so that the electrode is spaced away from the bottom of the container. The fastener securely holds the battery block so that the electrodes are interposed between the interior surfaces of the containers.

ELECTRODE ASSEMBLY AND ELECTRIC STORAGE DEVICE

Provided are an electrode assembly including a sheet-shaped current collector that has, on at least one face thereof, a mixture agent layer containing an active material and is spirally wound, in which the current collector has, in a portion on a side of at least one end of a winding axis, a non-mixture agent layer part having no mixture agent layer formed therein, and a mass per unit area of the mixture agent layer is larger in an edge portion on the side of the non-mixture agent layer part by 0.3% or more and 1.0% or less than in a portion other than the edge portion; and an electric storage device including the electrode assembly. 1. An electrode assembly comprising a sheet-shaped current collector that has , on at least one face thereof , a mixture agent layer containing an active material and is spirally wound ,wherein the current collector has, in a portion on a side of at least one end of a winding axis, a non-mixture agent layer part having no mixture agent layer formed therein, anda mass per unit area of the mixture agent layer is larger in an edge portion on the side of the non-mixture agent layer part by 0.3% or more and 1.0% or less than in a portion other than the edge portion.2. The electrode assembly according to claim 1 , wherein the edge portion of the mixture agent layer on the side of the non-mixture agent layer part corresponds to a part within 1 mm to 5 mm from an edge of the mixture agent layer on the side of the non-mixture agent layer part.3. The electrode assembly according to claim 1 , wherein a ratio of peel strength of the edge portion of the mixture agent layer on the side of the non-mixture agent layer part to peel strength of the portion other than the edge portion is 104% or more.4. An electric storage device comprising an electrode assembly and a case for housing the electrode assembly claim 1 ,the electrode assembly including a sheet-shaped current collector that has, on at least one face thereof, a mixture agent layer containing an ...

BATTERY

A battery includes: an electricity-generating element that is formed by winding an electrode plate and a separator and has a space at a winding axial portion; and a spacer having an inclined portion having a width that is gradually reduced toward the center of the electricity-generating element. At least a part of the spacer is disposed in the space at the winding axial portion of the electricity-generating element, the inclined portion of the spacer abutting against an end of an inner wall of the electricity-generating element. 1. A battery comprising:an electricity-generating element that is formed by winding an electrode plate and a separator and has a space at a winding axial portion; anda spacer having an inclined portion having a width that is gradually reduced toward the center of the electricity-generating element;wherein at least a part of the spacer is disposed in the space at the winding axial portion of the electricity-generating element, the inclined portion of the spacer abutting against an end of an inner wall of the electricity-generating element.2. The battery according to claim 1 , wherein the inclined portion of the spacer is configured in such a manner as to press the end of the inner wall of the electricity-generating element.3. The battery according to claim 1 , further comprising a battery case housing the electricity-generating element claim 1 ,wherein an end opposite to an end of the spacer disposed in the space at the winding axial portion of the electricity-generating element is configured in such a manner as to abut against the battery case or a member fixed to the battery case.4. The battery according to claim 1 , wherein the electrode plate includes a mixture formed portion at which a mixture for a positive electrode or a negative electrode is formed claim 1 , and a mixture non-formed portion not having the mixture formed thereat claim 1 , the electricity-generating element having the mixture non-formed portion at the end in the winding ...

METHOD FOR FABRICATING A NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A nonaqueous electrolyte secondary battery includes: a positive electrode including a positive electrode current collector and a positive electrode material mixture layer containing a positive electrode active material and a binder and provided on the positive electrode current collector; a negative electrode ; a porous insulating layer interposed between the positive electrode and the negative electrode ; and a nonaqueous electrolyte. The positive electrode current collector contains aluminium. The positive electrode current collector has an average crystal grain size of 1.0 μm or more. 114-. (canceled)15. A method for fabricating a nonaqueous electrolyte secondary battery including a positive electrode including a positive electrode current collector and a positive electrode material mixture layer containing a positive electrode active material and a binder and provided on the positive electrode current collector , a negative electrode , a porous insulating layer interposed between the positive electrode and the negative electrode , and a nonaqueous electrolyte , the method comprising the steps of:(a) preparing the positive electrode;(b) preparing the negative electrode; and(c) either winding or stacking the positive electrode and the negative electrode with the porous insulating layer interposed therebetween after steps (a) and (b), wherein step (a) includes the steps of:(a1) coating the positive electrode current collector with positive electrode material mixture slurry containing the positive electrode active material and the binder, and drying the slurry,(a2) rolling the positive electrode current collector coated with the dried positive electrode material mixture slurry, and(a3) performing heat treatment on the positive electrode current collector coated with the dried positive electrode material mixture slurry at a predetermined temperature after step (a2),the positive electrode current collector contains aluminium, andthe positive electrode current ...

Prismatic secondary battery

A prismatic secondary battery includes a prismatic hollow outer body having a mouth and a bottom and storing an electrode assembly, a positive electrode collector, a negative electrode collector, and an electrolyte, a sealing plate sealing up the mouth of the prismatic hollow outer body, and a positive electrode terminal and a negative electrode terminal attached to the sealing plate; the sealing plate includes a gas release valve at the center between the positive electrode terminal and the negative electrode terminal and includes an electrolyte pour hole on one side of the gas release valve and, on the other side on the front face, a concaved flat face with a height lower than that of the peripheral portion; and the concaved flat face is formed with an identification code.

BATTERY

According to one embodiment, a battery includes an electrode group, a tab, a conductive nipping member, a case, a lid and a lead. The conductive nipping member includes first and second nipping sections. The first and second nipping sections divide the tab into two bundles in which portions of the tab are laminated onto each other in a thickness direction of the electrode group. The lead includes a connecting section connected electrically to a terminal, and current collecting sections which are two sections branched from the connecting section and sandwiching the nipping member. 1. A battery comprising:an electrode group in which a positive electrode and a negative electrode are wound into a flat form with a separator interposed therebetween, the positive electrode comprising a positive electrode current collector, and the negative electrode comprising a negative electrode current collector;a positive electrode tab which is a section of the positive electrode current collector projected in a spiral form from one end face of the electrode group;a negative electrode tab which is a section of the negative electrode current collector projected in a spiral form from the other end face of the electrode group;a case in which the electrode group is stored;a lid provided to an opening in the case and comprising a positive electrode terminal and a negative electrode terminal;a positive electrode lead in which one end is electrically connected to the positive electrode terminal, and the other end is electrically connected to the positive electrode tab;a negative electrode lead in which one end is electrically connected to the negative electrode terminal, and the other end is electrically connected to the negative electrode tab;an insulating tape which is arranged on an outermost circumference of the electrode group;a first insulating cover comprising a resin molded product having a shape which covers areas of the positive electrode lead and the positive electrode tab which ...

Heat sealing separators for nickel zinc cells

Embodiments are described in terms of selective methods of sealing separators and jellyroll electrode assemblies and cells made using such methods. More particularly, methods of selectively heat sealing separators to encapsulate one of two electrodes for nickel-zinc rechargeable cells having jellyroll assemblies are described. Selective heat sealing may be applied to both ends of a jellyroll electrode assembly in order to selectively seal one of two electrodes on each end of the jellyroll.

Battery

A battery includes: a cylindrical battery case; and an electrode body disposed in the battery case, and including a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate. A spacer formed of a dense body and an electrolyte storage space storing an electrolyte are provided between the electrode body and the battery case on one end or both ends of the battery case in an axial direction of the electrode body.

Method for removing burrs of battery electrode plates by inductively coupled plasma dry etching

The present invention provides a method for removing burrs of battery electrode plates using inductively coupled plasma (ICP) dry etching, in which an induction coil is used for ionizing reaction gas. A DC bias is applied to accelerate the ionized reaction gas to bombard the burrs of electrode plate, removing burrs that formed in machining processes using physical bombardment. The equipment used in the present invention is an ICP etch system. The method according to the present invention can completely remove the burrs of electrode plate, thereby effectively preventing short circuits caused by burrs penetrating the membrane separator in the battery.

BATTERY AND MANUFACTURE METHOD THEREOF

A battery includes a casing and a plurality of cell coils. The casing includes a bottom and a top, the bottom or the top surface of the casing are not symmetrical with each other and the multiple cell coils are placed in the casing and are electrically connected to each other. Each of the cell coils includes a positive node, a negative node and an insulation sheet, and the insulation sheet is between the positive node and the negative node. An outer diameter of the cell coil changes along with the shape of the casing. A manufacture method of a battery is provided. 1. A battery , comprising:a casing including a bottom surface and a top surface, wherein the bottom surface and the top surface of the casing are not symmetrical with each other;a plurality of cell coils disposed in the casing and electrically connected to each other, wherein each of the cell coil includes at least a positive node, at least a negative node, and at least an insulation sheet, the insulation sheet is between the positive node and the negative node, and an outer diameter of the cell coil changes along with the shape of the casing.2. The battery according to claim 1 , wherein a winding density of the each cell coil changes along a winding direction of the corresponding cell coil.3. The battery according to claim 1 , wherein a winding density of at least a cell coil along a winding direction is different from a winding density along the direction that the cell coil winds along with the top or bottom surface of the casing.4. The battery according to claim 1 , wherein the outer diameter of each of the cell coils increases with winding layers of the cell coil.5. The battery according to claim 1 , wherein a shape of a cross section of the cell coil is appropriate for an internal line of the casing.6. The battery according to claim 1 , wherein winding directions of at least two cell coils are opposite to each other.7. The battery according to claim 6 , wherein the two cell coils are wounded with the ...

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A nonaqueous electrolyte secondary battery includes a flat winding electrode assembly including a positive electrode substrate exposed portion on one end and a negative electrode substrate exposed portion on the other end. The winding numbers of the positive and the negative electrode substrate exposed portions are each 30 or more. The positive and negative electrode substrate exposed portions each have an outermost surface welded and connected with a positive and a negative electrode collectors, respectively. A nonaqueous electrolyte used to fabricate the battery contains a lithium salt having an oxalate complex as an anion. At the welded connection portions, all of the layers of the positive electrode substrate exposed portion are melted to be welded and connected to the positive electrode collector, and all of the layers of the negative electrode substrate exposed portion are melted to be welded and connected to the negative electrode collector. 1. A nonaqueous electrolyte secondary battery comprising:a flat winding electrode assembly formed by winding an elongated positive electrode and an elongated negative electrode with an elongated separator interposed therebetween; andan outer body storing the flat winding electrode assembly and a nonaqueous electrolyte,the flat winding electrode assembly including a positive electrode substrate exposed portion wound on one end and a negative electrode substrate exposed portion wound on the other end,the winding number of the wound positive electrode substrate exposed portion being 30 or more, and the winding number of the wound negative electrode substrate exposed portion being 30 or more,the wound positive electrode substrate exposed portion having an outermost surface welded and connected with a positive electrode collector, and the wound negative electrode substrate exposed portion having an outermost surface welded and connected with a negative electrode collector,the nonaqueous electrolyte containing a lithium salt ...

Nonaqueous electrolyte secondary battery

In a prismatic nonaqueous electrolyte secondary battery according to an embodiment of the invention, a flat winding electrode assembly and a nonaqueous electrolyte are housed in a prismatic outer body. A positive electrode includes a positive electrode substrate exposed portion formed along the longitudinal direction. A negative electrode includes a negative electrode substrate exposed portion formed along the longitudinal direction. The nonaqueous electrolyte contains a lithium salt having an oxalate complex as an anion at the time of making the nonaqueous electrolyte secondary battery. The winding electrode assembly has a winding end of the negative electrode disposed on a further outer side than that of the positive electrode. The winding number of the positive electrode and the negative electrode are each 15 or more.

Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery includes: a flat winding electrode assembly formed by winding elongated positive and negative electrodes with an elongated separator interposed therebetween; and an outer body storing the flat winding electrode assembly and a nonaqueous electrolyte. The flat winding electrode assembly includes a positive electrode substrate exposed portion wound on one end, and a negative electrode substrate exposed portion wound on the other end. A positive electrode collector is welded and connected to both sides of the outermost surface of the wound positive electrode substrate exposed portion. A negative electrode collector is welded and connected to both sides of the outermost surface of the wound negative electrode substrate exposed portion. The nonaqueous electrolyte contains a lithium salt having an oxalate complex as an anion at the time of making the nonaqueous electrolyte secondary battery. This structure provides a nonaqueous electrolyte secondary battery that has excellent cycling characteristics.

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A prismatic nonaqueous electrolyte secondary battery includes: a flat electrode assembly including a positive electrode and a negative electrode; an outer can storing the flat electrode assembly and a nonaqueous electrolyte; and a sealing plate sealing an opening portion of the outer can. The flat electrode assembly has a portion thereof other than the side facing the sealing plate, covered with an insulating sheet. The nonaqueous electrolyte contains at least one of a lithium salt having an oxalate complex as an anion and lithium difluorophosphate (LiPFO) at the time of making the nonaqueous electrolyte secondary battery. The wettability of the insulating sheet to the nonaqueous electrolyte is lower than that of the outer can to the nonaqueous electrolyte. This configuration allows a nonaqueous electrolyte having a high viscosity to easily penetrate the inside of the electrode assembly. 1. A nonaqueous electrolyte secondary battery comprising:a flat electrode assembly including a positive electrode, a negative electrode and a separator interposed therebetween;an outer can storing the flat electrode assembly and a nonaqueous electrolyte; anda sealing plate sealing an opening portion of the outer can,the flat electrode assembly having a portion thereof other than the side facing the sealing plate, covered with an insulating sheet,{'sub': 2', '2, 'the nonaqueous electrolyte containing at least one of a lithium salt having an oxalate complex as an anion and lithium difluorophosphate (LiPFO) at the time of making the nonaqueous electrolyte secondary battery, and'}the wettability of the insulating sheet to the nonaqueous electrolyte being lower than that of the outer can to the nonaqueous electrolyte.2. The nonaqueous electrolyte secondary battery according to claim 1 , whereinthe outer can is made using aluminum or aluminum alloy andthe insulating sheet is made using polyolefin.3. The nonaqueous electrolyte secondary battery according to claim 1 , whereinthe flat ...

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

In a prismatic nonaqueous electrolyte secondary battery, a flat winding electrode assembly and a nonaqueous electrolyte are housed in a prismatic outer body. A positive electrode includes a positive electrode substrate exposed portion formed along the longitudinal direction. A negative electrode includes a negative electrode substrate exposed portion formed along the longitudinal direction. The nonaqueous electrolyte contains a lithium salt having an oxalate complex as an anion at the time of making the nonaqueous electrolyte secondary battery. The area of the negative electrode substrate exposed portion is 700 cmor more. The area of the positive electrode substrate exposed portion is 500 cmor more. The area of the negative electrode substrate exposed portion is larger than the area of the positive electrode substrate exposed portion. The prismatic nonaqueous electrolyte secondary battery above can provide a nonaqueous electrolyte secondary battery that has excellent cycling characteristics and excellent reliability. 1. A nonaqueous electrolyte secondary battery comprising:a flat winding electrode assembly formed by winding an elongated positive electrode and an elongated negative electrode with an elongated separator interposed therebetween; anda prismatic outer body storing the flat winding electrode assembly and a nonaqueous electrolyte,the positive electrode including a positive electrode substrate exposed portion formed along a longitudinal direction,the negative electrode including a negative electrode substrate exposed portion formed along a longitudinal direction,the nonaqueous electrolyte containing a lithium salt having an oxalate complex as an anion at the time of making the nonaqueous electrolyte secondary battery,{'sup': '2', 'the area of the negative electrode substrate exposed portion being 700 cmor more,'}{'sup': '2', 'the area of the positive electrode substrate exposed portion being 500 cmor more, and'}the area of the negative electrode substrate ...

RECHARGEABLE BATTERY WITH A JELLY ROLL HAVING MULTIPLE THICKNESSES

The disclosed embodiments relate to the design of a battery cell with multiple thicknesses. This battery cell includes a jelly roll enclosed in a pouch, wherein the jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, and the first and second conductive tabs are extended through seals in the pouch to provide terminals for the battery cell. Furthermore, the battery cell has two or more thicknesses, wherein the different thicknesses are created by removing material from one or more of the layers before winding the layers together. 1. A battery cell , comprising:a jelly roll that varies in thickness, comprising layers that are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;wherein the anode comprises a sheet having a length in a direction of winding, a width perpendicular to the direction of winding and a thickness, wherein the width of the anode tapers diagonally along the length of the anode;wherein the cathode comprises a sheet having a length in a direction of winding, a width perpendicular to the direction of winding and a thickness, wherein the width of the cathode tapers diagonally along the length of the cathode; andwherein after the jelly roll is formed by winding the layers together, the diagonal taper of the anode and the diagonal taper of the cathode cause the jelly roll to vary in thickness by tapering along an axis of winding.2. The battery cell of claim 1 , further comprising:a pouch enclosing the jelly roll, wherein the pouch is flexible.3. The battery cell of claim 2 , further comprising:a first conductive tab coupled to the cathode; anda second conductive tab coupled to the anode,wherein the first and second conductive tabs ...

RECHARGEABLE BATTERY

A rechargeable battery including: an electrode assembly; a center pin arranged at a center of the electrode assembly; a case containing the electrode assembly; and a cap assembly coupled to an opening of the case and electrically connected to the electrode assembly, and the center pin includes a first pipe arranged at the center of the electrode assembly, and a second pipe arranged in the first pipe with a buffering space between the first pipe and the second pipe, the second pipe having a strength that is different from a strength of the first pipe. 1. A rechargeable battery comprising:an electrode assembly;a center pin arranged at a center of the electrode assembly;a case containing the electrode assembly; anda cap assembly coupled to an opening of the case and electrically connected to the electrode assembly, a first pipe arranged at the center of the electrode assembly; and', 'a second pipe arranged in the first pipe with a buffering space between the first pipe and the second pipe, the second pipe having a strength that is different from a strength of the first pipe., 'wherein the center pin comprises2. The rechargeable battery of claim 1 , wherein the first pipe has a first strength claim 1 , and the second pipe has a second strength greater than the first strength.3. The rechargeable battery of claim 1 , wherein the first pipe has a first thickness claim 1 , and the second pipe is formed of a same material as the first pipe and has a second thickness greater than the first thickness.4. The rechargeable battery of claim 1 , a cylinder portion having a first diameter and a first length; and', 'an inclined portion extended from lateral ends of the cylinder portion,, 'wherein the first pipe compriseswherein the second pipe has a second diameter that is less than the first diameter and a second length that is greater than the first length, andwherein lateral ends of the second pipe are supported by inner sides of the inclined portion.5. The rechargeable battery of ...

Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery includes an electrode assembly, a nonaqueous electrolyte, a container, and a collector material. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The negative electrode is opposed to the positive electrode. The separator is disposed between the positive electrode and the negative electrode. The nonaqueous electrolyte contains lithium bis(oxalato)borate (LiBOB). The container houses the electrode assembly and the nonaqueous electrolyte, and is provided with terminals. The collector material connects the terminals to the electrode assembly. The cross-sectional area of the collector material is not less than 1.5 mm 2 .

SINGLE WINDING CORE, LITHIUM CELL WITH SINGLE WINDING CORE AND SUCCESSIVE WINDING METHOD FOR SINGLE WINDING CORE

Provided include a single winding core, a lithium cell with a single winding core, and a successive winding method of a single winding core, where a positive area on a surface of a positive plate corresponds to a negative area on a surface of a negative plate of the single winding core; a plurality of positive tabs and a plurality of negative tabs are respectively disposed at one side of the positive plate and the negative plate, and the negative tabs and the positive tabs are arranged to be interlaced with each other. Thereby, after the positive plate, a first isolation film, the negative plate, and a second isolation film are sequentially stacked and then successively wound, the positive tabs and negative tabs respectively form a positive and a negative tab groups, rendering the single winding core capable of high-current discharge. 1. A single winding core , formed through successive winding after stacking an elongated positive plate , a first isolation film , an elongated negative plate , and a second isolation film , whereina positive area is formed at most of the area of a surface of the positive plate, and a plurality of spaced positive tabs are disposed at one side of the positive plate in a lengthwise direction; anda negative area is formed at most of the area of a surface of the negative plate, the negative area corresponds to the positive area, a plurality of spaced negative tabs is disposed at one side of the negative plate in a lengthwise direction, and when the elongated positive plate is stacked with the elongated negative plate, the negative tabs and the positive tabs are interlaced with each other;thereby, after the positive plate, the first isolation film, the negative plate, and the second isolation film are successively wound, the positive tabs form a positive tab group, and the negative tabs form a negative tab group.2. A lithium cell with a single winding core according to claim 1 , comprising a casing claim 1 , wherein an electrolyte fluid and ...

ELECTRODE ASSEMBLY AND SECONDARY BATTERY USING THE SAME

Disclosed are an improved electrode assembly which may allow an electrode plate to be more easily impregnated with an electrolyte and also ensure gas to be easily discharged, and a secondary battery having the electrode assembly. The electrode assembly includes at least one cathode plate formed by coating an electrode current collector with a cathode active material, at least one anode plate formed by coating an electrode current collector with an anode active material, and a separator interposed between the cathode plate and the anode plate and having at least one vent formed therein. 1. An electrode assembly for a secondary battery , comprising:at least one cathode plate formed by coating an electrode current collector with a cathode active material;at least one anode plate formed by coating an electrode current collector with an anode active material; anda separator interposed between the cathode plate and the anode plate and having at least one vent formed therein.2. The electrode assembly for a secondary battery according to claim 1 ,wherein the separator is folded at the sides of the cathode plate and the anode plate, and the vent is formed at the folded portion.3. The electrode assembly for a secondary battery according to claim 2 ,wherein a plurality of the cathode plates and the anode plates are alternately stacked with the folded separator being interposed therebetween.4. The electrode assembly for a secondary battery according to claim 2 ,wherein the separator has the same folding direction at each layer.5. The electrode assembly for a secondary battery according to claim 4 ,wherein the separator is stacked into multiple layers at the folded portion, and the vents formed in each layer of the folded portion are at least partially connected to form a predetermined passage.6. The electrode assembly for a secondary battery according to claim 5 ,wherein the separator has the same vent location and shape at each layer.7. The electrode assembly for a secondary ...

Electrode assembly having stepped portion, as well as battery cell, battery pack, and device including the electrode assembly

There is provided an electrode assembly comprising at least one stacked and folded type electrode stack in which a plurality of electrode units having electrode tabs are stacked in a state that the electrode units are separated by a sheet of separating film. The stacked and folded type electrode stack includes at least one stepped portion formed of electrode units having different areas and stacked on one another.

STEPWISE ELECTRODE ASSEMBLY HAVING VARIOUSLY-SHAPED CORNER AND SECONDARY BATTERY, BATTERY PACK AND DEVICE COMPRISING THE SAME

There is provided an electrode assembly having steps including: a first electrode stair including at least one first electrode unit; and a second electrode stair including at least one second electrode unit having an area different from that of the first electrode unit, wherein the first electrode stair and the second electrode stair are stacked to be adjacent, separated by at least one separator as a boundary therebetween and including one or more electrode laminates having steps formed by a difference between areas of the first electrode stair and the second electrode stair, and shapes of the corners of the first electrode stair and the second electrode stair having steps are different. There is also provided a secondary battery including the electrode assembly. Secondary batteries having various designs without restriction in shapes of corners of electrode units can be provided. 1. An electrode assembly comprising:a first electrode stair including at least one first electrode unit; anda second electrode stair including at least one second electrode unit having an area different from that of the first electrode unit,wherein the first electrode stair and the second electrode stair are stacked to be adjacent, separated by at least one separator as a boundary therebetween and including one or more electrode laminates having steps formed by a difference between the areas of the first electrode stair and the second electrode stair,shapes of corners of the first electrode stair and the second electrode stair are different,wherein the at least one first electrode unit extends along a length direction, extends along a width direction, defines a maximum length along the length direction, and defines first and second linear edges spaced apart along the width direction, each of the first and second linear edges being shorter than the maximum length, andwherein a perimeter of the at least one first electrode unit at endpoints of each of the first and second linear sides ...

Method and device for producing electrode windings

A method produces electrode windings, in which method a strip- or ribbon-like anode and a strip- or ribbon-like cathode are provided and flat collector lugs are formed on at least one longitudinal side of the anode and of the cathode at varying distances and/or contours are cut into the longitudinal sides of the electrodes. The anode and the cathode are wound up together with a strip- or ribbon-like separator to form a winding with the sequence anode/separator/cathode. The method is distinguished, in particular, in that the process of forming collector lugs and/or of cutting contours and the process of winding up overlap with respect to time.

LITHIUM-ION SECONDARY CELL AND METHOD FOR MANUFACTURING SAME

The cell has a wound electrode assembly including a positive electrode and a negative electrode that are wound with a separator interposed therebetween, and a liquid electrolyte, wherein the negative electrode includes an elongated negative electrode current collector , and a negative electrode mixture layer that is formed on the negative electrode current collector and contains at least a graphite material . The graphite material in the negative electrode mixture layer is arranged such that the (002) plane A of at least 50 mass % of the graphite material is perpendicular to the surface of the negative electrode current collector and parallel to the longitudinal direction of the elongated negative electrode current collector. 1. A lithium-ion secondary cell comprising a wound electrode assembly including a positive electrode and a negative electrode that are wound with a separator interposed therebetween; and a liquid electrolyte , whereinthe negative electrode includes an elongated negative electrode current collector, and a negative electrode mixture layer that is formed on the surface of the negative electrode current collector and contains at least a graphite material, andthe graphite material in the negative electrode mixture layer is arranged such that a (002) plane of at least 50 mass % of the graphite material is perpendicular to the surface of the negative electrode current collector and parallel to the longitudinal direction of the elongated negative electrode current collector.2. The lithium-ion secondary cell according to claim 1 , wherein the graphite material has a median diameter (D) of 5 μm to 20 μm according to a particle size distribution measured based on a laser diffraction and scattering method.3. A method for manufacturing a lithium-ion secondary cell comprising a wound electrode assembly including a positive electrode and a negative electrode that are wound with a separator interposed therebetween claim 1 , the positive electrode including a ...

ELECTRIC STORAGE DEVICE

An electric storage device includes an electrode assembly, in which a positive electrode and a negative electrode in the shape of a sheet are wound with a separator sandwiched therebetween. The electrode assembly has a flat shape and includes a first flat portion and a second flat portion, which are opposed to each other, and a first curved portion and a second curved portion which connect end portions of the first and second flat portions together. One of the positive electrode and the negative electrode covers an inner-circumferential end portion of the other electrode and is disposed on an innermost circumference of the electrode assembly. An inner-circumferential end portion of the one of the electrodes causes an elastic force to act outwardly on the other electrode. 1. An electric storage device comprising an electrode assembly , in which a positive electrode and a negative electrode in the shape of a sheet are wound with a separator sandwiched therebetween , whereinthe electrode assembly has a flat shape and includes a first flat portion and a second flat portion, which are opposed to each other, and a first curved portion and a second curved portion which connect end portions of the first and second flat portions together,one of the positive electrode and the negative electrode covers an inner-circumferential end portion of the other electrode and is disposed on an innermost circumference of the electrode assembly, andan inner-circumferential end portion of the one of the electrodes causes an elastic force to act outwardly on the other electrode.2. The electric storage device according to claim 1 , whereina leading-end edge of the inner-circumferential end portion of the one of the electrodes is positioned in an area of one of the first and second curved portions beyond a fold-back point of the one of the first and second curved portions.3. The electric storage device according to claim 1 , whereineach of the first and second curved portions has the shape of ...

STEPPED ELECTRODE ASSEMBLY HAVING PREDETERMINED A THICKNESS RATIO IN THE INTERFACE BETWEEN ELECTRODE UNITS, BATTERY CELL AND DEVICE COMPRISING THE SAME

There are provided an electrode assembly, and a battery cell, a battery pack, and a device. The electrode assembly includes a combination of two or more types of electrode units having different areas, wherein the electrode units are stacked such that steps are formed, and electrode units are formed such that a positive electrode and a negative electrode face one another at an interface between the electrode units. 1. An electrode assembly comprising a combination of two or more types of electrode unit having different areas , the electrode units being stacked so as to form a stepped portion therebetween ,wherein a positive electrode and a negative electrode are formed to face each other at an interface between the electrode units, and {'br': None, 'i': dN', '/dP', '≦dN', '/dP, 'sub': n', 'n', 'n', 'n+1,, 'Equation 4'}, 'Equation 4 is satisfiedwhere n is an integer not less than 1,{'sub': 'n', 'dNis a thickness of the negative electrode of the electrode unit that is the n-th largest in area,'}{'sub': 'n', 'dPis a thickness of the positive electrode of the electrode unit that is the n-th largest in area, and'}{'sub': 'n+1', 'dPis a thickness of the positive electrode of the electrode unit that is the (n+1)th largest in area.'}2. An electrode assembly of claim 1 , wherein Equation 4-1 is satisfied:{'br': None, 'i': ≦dN', '/dP', '≦dN', '/dP, 'sub': n', 'n', 'n', 'n+1, '0.5≦2\u2003\u2003Equation 4-1'}where n is an integer not less than 1,{'sub': 'n', 'dNis a thickness of a negative electrode of an electrode unit that is the n-th largest in area,'}{'sub': 'n', 'dPis a thickness of a positive electrode of an electrode unit that is the n-th largest in area, and'}{'sub': 'n+1', 'dPis a thickness of a positive electrode of the electrode unit that is the (n+1)th largest in area.'}3. The electrode assembly of claim 1 , wherein the positive electrode of the electrode unit having a relatively small area faces the negative electrode of the electrode unit having a relatively large ...

Method for manufacturing an electrode

An electrode ( 1 ) for an electrochemical energy storage apparatus has a contour ( 2 ) exhibiting two side edges, wherein a first side edge ( 3 ) and a second side edge ( 4 ) are interconnected by a connecting section ( 5 ). The connecting section ( 5 ) comprises a substantially linear region ( 5 a ) which transitions into the first side edge ( 3 ), and a substantially curved region ( 5 b ) which transitions into the second side edge ( 4 ). When manufacturing such an electrode the first side edge ( 3 ) is created by a first cut, the second side edge ( 4 ) is created by a second cut, and the connecting section ( 5 ) is created along with the first cut or the second cut.

Electric storage element

A battery includes positive and negative external terminals having exposed portions exposed from a casing to the outside, positive and negative current collectors connected to the external terminals, and electrode assemblies having positive and negative electrodes and a separator. The positive and negative electrodes are wound with the separator being interposed so as to have positions shifted to opposite sides in a width direction to the separator. Formed in the casing is a narrowly elongated gap extending between the positive current collector side and the negative current collector side. The positive electrode side of the gap is closed by a closure member. A foreign material is prevented from moving without decreasing an electric capacity of the battery and deteriorating injection property of an electrolytic solution.

High-capacity Cylindrical Lithium Ion Battery and Production Method Thereof

The invention discloses a high-capacity cylindrical lithium ion battery. Tab-position end face is shaped; a high frequency oscillation and pressure are applied on to make the foil bodies softened in the scope of 0.1-6.5 mm. At the instant of high-frequency oscillation, the rigidity of the foil body is greatly decreased; and the foil bodies are mutually wound and compressed together, so that the weight density of the foil body in unit volume is increased and meanwhile, the rigidity of the compressed foil body at the Tab-position end face is greatly increased, thereby laying a firm foundation for laser welding of the 1 Tab-position end face and a current collector, increasing a laser welding effective area of the Tab-position end face and the current collector, and improving the welding strength. 1. A method for shaping tab-position end faces of a core winder , comprising steps of: oscillating foil bodies of the tab-position end faces at a high frequency , and applying a pressure to soften the foil bodies in a scope of 0.1-6.5 mm of the tab-position end faces such that the foil bodies of the cathode and anode of the tab-position end faces are entangled together and compressed together.2. The method for shaping tab-position end faces of a core winder according to claim 1 , characterized in that the foil bodies of the tab-position end faces are oscillated at a high frequency with a 0.1-100.5 high-power ultrasonic wave.3. The method for shaping tab-position end faces of a core winder according to claim 1 , characterized in that the foil bodies of the cathode and anode are respectively compressed and decreased by 0.1-6.5 mm.4. A method for producing a high-capacity cylindrical lithium ion battery claim 1 , comprising the following steps:1) preparing the core winder: slurrying for the cathode, continuously coating the cathode electrode, rolling the cathode electrode, slitting the cathode electrode, slurrying for the anode, continuously coating the anode electrode, rolling ...

Electrode assembly having stepped portion, as well as battery cell, battery pack, and device including the electrode assembly

There is provided an electrode assembly. The electrode assembly includes a stack of unit cells respectively including at least one negative electrode and at least one positive electrode, alternately stacked, wherein at least one separator is placed on each of both sides of the electrodes, and at least one of the unit cells has an area different from that of an adjacent unit cell to form at least one stepped portion on the electrode assembly. In addition, there are also provided a battery cell, a battery pack, and a device that include the electrode assembly.