PROCEDURE FOR MANUFACTURING A SUBSTRATE FOR AN ELECTRODE OF A GAS CELL UNIT AND IN THE PROCEDURE MANUFACTURED SUBSTRATE

The available invention concerns a procedure for manufacturing a substrate for an electrode of a gas cell unit, which at least an electrically conductive element umfaß t, which is connected at least one contact point electrically leading with itself or with another electrically conductive element of the substrate.

Such procedures are well-known from the state of the art.

The electrode arranged on an electrode side of the substrate forms a component of a cathode anode electrolyte unit, in which in the enterprise of the gas cell unit an electro-chemical reaction runs off, in their process at the anode of the KAE unit electrons to be set free and this for the cathode of the KAE unit for the ionization of oxygen atoms over one äuß eren electric circuit to be supplied.

Usually several gas cell units become a gas cell block group zusammengefaß t, in which the gas cell units along a pile direction sequences.

Between the KAE units of two successive gas cell units arranged contact plates serve load reconciliation between the cathode a gas cell unit and the anode of the neighbouring gas cell unit, in order to supply to the cathode the electrons needed for the ionization. Electrical loads can be measured by edge-constant contact plates of the gas cell block group, in order to supply it to an external utilizable electric circuit run.

The substrate, on that the anode, the electrolyte and the cathode of the KAE unit arranged are muß electrically conductive its and therefore for example as metal wire mesh, Metalldrahtgewebe, Metalldrahtgestrick is trained or as a fleece built up from electrically conductive fibers.

In order depresses a gaseous fuel to the anode to make possible, muß the substrate on the one hand a sufficient gas permeability exhibit. On the other hand muß the substrate in addition, a sufficient mechanical firmness exhibit, in order to be able to serve as integrated carriers for the KAE element.

It is already well-known to increase the firmness of a substrate designed as Metalldrahtgestrick thereby daß the wires, from which the Gestrick is formed, at contact points, at which these wires over-cross, by condenser Entladungsschweiß EN and electrically leading to be mechanically interconnected.

With the condenser Entladungsschweiß EN exists however the disadvantage, daß the Schweiß prozeß is only with difficulty controllable and the danger exists, daß the Drahtgestrick to some the contact points burns. Auß erdem a purposeful controlling of the number of contact points is, at those a Verschweiß ung takes place, not possible.

The available invention is the basis the task to create a procedure of the kind initially specified which it makes possible to increase the firmness of the substrate in simple and safe way without the substrate to destroy.

This task becomes erfindungsgemä&szlig with a procedure with the characteristics of the generic term of requirement 1; thus solved, daß the electrically conductive element at the contact point with itself and/or with the other electrically conductive element of the substrate is soldered.

That erfindungsgemäß EN solution is the basis thus concept, which connection of the electrically of conductive elements, from which the substrate is formed, not by a with difficulty controllable condenser Entladungsschweiß procedure to manufacture but by a soldering procedure.

The production of the solder joint requires only a brief increase of the temperature of the substrate on a temperature above the fusion point of the plumb bob material. Differently than with the condenser Entladungsschweiß EN takes place this heating up of the substrate essentially homogeneous, so daß no local temperature points to arise can, which to a range-wise destruction of the substrate to lead.

Auß erdem the possibility exists of steering via the quantity the substrate of supplied plumb bob material the number of junction points formed by soldering.

In order to bring the plumb bob into the range of the contact points of the substrate, there are different possibilities.

So can be for example intended, daß the substrate is brought as a whole into liquid plumb bob material.

Alternatively or supplementing can be intended, da&szlig for this; the substrate is brought into a suspension of a plumb bob powder in a bindemittelhaltigen solvent.

In both cases is favourable-proves intended, daß surplus plumb bob material by dripping off letting and/or by ejecting is removed from the substrate.

Alternatively or in addition to immersing the substrate into liquid plumb bob material or into a plumb bob material a containing suspension can be also intended, daß on the substrate a sticky coat is produced and afterwards a plumb bob powder on the substrate is applied.

The production of the sticky coat at the substrate can take place in particular via it, daß the substrate is brought into a solution, which contains a bonding agent.

Optionally can the solution furthermore a softener contain.

In this case the substrate is preferably dried after bringing in into the solution and before applying the plumb bob powder.

In the cases, in which the substrate is brought in into a solution, which contains a bonding agent, is it favorably, if the substrate before soldering is warmed up, in order to remove the bonding agent.

Preferably the substrate is warmed up for removing the bonding agent to a temperature within the range of approximately 200°C to approximately 500°C, in particular within the range of approximately 300°C to approximately 400°C.

In the cases, in which the substrate is brought in into a bindemittelhaltige solution, an acrylate and/or a Methacrylat are preferably used as bonding agent.

Alternatively or in addition to immersing the substrate as whole one into a plumb bob material can be also intended, daß the substrate from at least an electrically conductive element is formed, which was occupied before with a plumb bob material.

Warmed up in this case the substrate favourable-proves for soldering the contact points to a temperature above the fusing temperature of the plumb bob material, after the substrate from the electrically conductive element or from the electrically conductive elements was formed.

In order to occupy the electrically conductive element with the plumb bob material, there are different possibilities.

So can be for example intended, daß the electrically conductive element before the formation of the substrate is brought into liquid plumb bob material.

In particular can be intended, daß the electrically conductive element as a wire is trained, which will provide with a coating from plumb bob material, as the wire is brought into liquid plumb bob material, before the substrate from the wire, for example by lichens, is formed weaving or knitting.

Alternatively or supplementing can be intended, da&szlig for this; the electrically conductive element, from which the substrate is formed, when an essentially linienförmiges element is trained and is connected before the formation of the substrate with an essentially linienförmigen element from a plumb bob material.

In particular the electrically conductive element can be trained as a wire, which is verzwirnt with a plumb bob wire from the plumb bob material, before the substrate from the wire, for example by lichens, is formed weaving or knitting.

During a preferential arrangement erfindungsgemäß EN of procedure is intended, daß the substrate from an electrically conductive element is formed, which is designed as essentially linienförmiges element.

The electrically conductive element can be trained in particular as electrically conductive fiber or as electrically conductive wire.

In particular can be intended, daß from a multiplicity of electrically conductive elements, which are designed as fibers, a fleece is formed, which forms a component of the substrate.

Alternatively or supplementing can be also intended, da&szlig for this; from an electrically conductive element, which is designed as wire, a network, a fabric or a Gestrick are formed, which form a component of the substrate.

In order to receive a substrate with a desired thickness, can be intended, daß the substrate a network, a fabric or a Gestrick with several situations umfaß t. In this case it is particularly favorable for the increase of the firmness of this network, fabric or Gestricks, if at least two different situations of the network, the fabric or the Gestricks at contact points are soldered with one another.

Furthermore can be intended, daß to the production of the substrate several networks, fabric or Gestricke to be formed. These networks, fabrics or Gestricke can resemble each other or differ however in different regard, for example according to the kind or the diameter of the used wire or according to the geometrical characteristics of the network, fabric or Gestricks. If it acts over Gestricke, then for example the mesh length and the mesh size between two different Gestricken can vary.

In this case it is particularly favorable for the increase of the mechanical firmness of the substrate, if at least two different networks, fabrics or Gestricke at contact points are soldered with one another.

Preferably at least two of the networks, fabrics or Gestricke from wires with different diameters are formed.

So, a electrode-lateral layer of the substrate can be in particular intended, on which the electrode of the gas cell unit is located to form from a close Gestrick from a comparatively thin wire while one is formed for the electrode turned away layer of the substrate from a grobmaschigen Gestrick from a comparatively thick wire.

Furthermore the available invention concerns a substrate for an electrode of a gas cell unit, which at least an electrically conductive element umfaß t, which is connected at least one contact point electrically leading with itself or with another electrically conductive element of the substrate.

The invention is the basis the further task to create a such substrate which exhibits a high mechanical firmness and in simple way is producible, without bereichsweise to be destroyed.

This task becomes erfindungsgemä&szlig with a substrate with the characteristics of the generic term of requirement 21; thus solved, daß the electrically conductive element at the contact point with itself or with another electrically conductive element is soldered.

Special arrangements erfindungsgemäß EN of substrate are the subject of the dependent requirements 22 to 27, their advantages already managing in connection with special arrangements erfindungsgemäß EN of procedure described are.

Requirement 28 is directed toward a gas cell unit, which at least erfindungsgemäß it substrate and an electrode arranged at the substrate umfaß t.

Requirement 29 is directed toward a gas cell block group, which a majority erfindungsgemäß it gas cell units umfaß t, those along a pile direction sequences.

Further characteristics and advantages of the invention are the subject of the following description and the graphic representation of remark examples.

In the designs show:

Fig. 1

a schematic perspective representation of a gas cell device with supply lines and exhausting lines for the oxidizing agent and the fuel gas;

Fig. 2

a schematic vertical cut by one in the housing of the gas cell device from Fig. 1 arranged gas cell block group;

Fig. 2A

a plan view from above on end plates of the gas cell block group from Fig. 2;

Fig. 3

a schematic perspective explosion representation of two gas cell units successive in the pile direction of the gas cell block group;

Fig. 4

right part of a schematic cross section by four gas cell units successive in the pile direction of the gas cell block group;

Fig. 5

one vergröß erte representation of the range I from Fig. 4;

Fig. 6

a cutout from a schematic plan view on a situation of a Drahtgestricks;

Fig. 7

a schematic cross section by the cathode anode electrolyte unit of a gas cell unit; and

Fig. 8

a schematic side view one with a plumb bob wire verzwirnten metal wire.

Resembles or functionally equivalent elements are characteristic in all figures with the same reference symbols.

One in the Fig. 1 to 7 represented, as a whole gas cell device marked with 100 umfaß t an essentially quaderförmiges housing 102 (see Fig. 1), into which an oxidizing agent supply line 104 flows, over those to the interior of the housing 102 an oxidizing agent, for example an air or a pure oxygen, by (not represented) a supply blower under a positive pressure of for example approximately 50 mbar one supplies.

Furthermore an oxidizing agent exhausting line 105 flows into the housing 102, by which surplus oxidizing agent from the interior of the housing 102 is removable.

In the interior of the housing 102 is in Fig. 2 as a whole represented gas cell block group 106 arranged, which a lower end plate 108, a middle upper end plate 110, two lateral upper end plates 111 and a multiplicity between the lower end plate 108 and the upper end plates 110, 111 more arranged, along a pile direction 112 successive gas cell units 114 umfaß t.

As best from Fig. 3 to see is umfa&szlig, which shows a perspective explosion representation of two along the pile direction 112 successive gas cell units 114; t everyone of the gas cell units 114 an essentially plattenförmige cathode anode electrolyte unit 116 (in the following briefly called KAE unit), which is held between a contact plate 118 and a fluid guidance framework 120.

The KAE unit 116 umfaß t, like in the Fig. are purely schematically represented to 4 and 5, a gas-permeable, electrically conductive substrate 121, whose structure will still in detail be described below.

Due to the gas permeability of the substrate 121 a gaseous fuel from a gaseous fuel area 124 bordering on the substrate 121 can pass through the substrate.

Furthermore umfaß t the KAE unit 116 a plattenförmige anode 122 from an electrically conductive ceramic material, located on the substrate 121, for example_{Ni-ZrO2-Cermet} (ceramic(s) metal mixture), which is porous, in order the gaseous fuel from the gaseous fuel area 124 depresses through the anode 122 to 122 electrolytes 126 bordering on the anode to make possible (see Fig. 5).

As gaseous fuel for example a kohlenwasserstoffhaltiges gas mixture or a pure hydrogen can be used.

The electrolyte 126 is preferably designed as solid electrolyte and for example from yttrium-stabilized zirconium dioxide in an educated manner.

On the anode 122 opposite side the electrolytes the 126 a plattenförmige cathode 128 borders, those from an electrically conductive ceramic material, for example from endowed LaMnO3, is formed and a porosity exhibits, in order an oxidizing agent, for example an air or a pure oxygen, from an oxidizing agent area 130 bordering on the cathode 128 depresses to that electrolytes 126 to make possible on the same.

The electrolyte 126 is essentially gas-tight, so daß no oxidizing agent from the oxidizing agent area 130 by the electrolytes 126 into the gaseous fuel area 124 and no gaseous fuel from the gaseous fuel area 124 by the electrolytes 126 into the oxidizing agent area 130 to arrive can.

In the enterprise of the gas cell device the KAE unit 116 of each gas cell unit 114 exhibits a temperature of for example approximately 850°C, with which the electrolyte is conductive 126 for oxygen ions. The oxidizing agent from the oxidizing agent area 130 takes up 122 electrons at the anode and delivers bivalent oxygen ions at the electrolytes 126, which walk by the electrolytes 126 through to the anode 122. At the anode 122 the gaseous fuel from the gaseous fuel area to 124 by the oxygen ions from that electrolytes 126 one oxidizes and delivers thereby electrons to the anode 122.

The contact plates 118 serve to exhaust those with the reaction at the anode 122 freely becoming electrons the electrons of the cathode 128 necessary by the anode 122 over the substrate 121 and/or to supply for the reaction at the cathode 128.

For this everyone of the contact plates 118 consists of an electrically well conductive Metallblech, (as best from Fig. 4 to see is) with a multiplicity of contact contacts 132 is provided, which exhibit themselves for example the form in the longitudinal direction 133 of the contact plate 118 extending ribs, those in the transverse direction 131 of the contact plate 118 sequences, whereby the contact contacts 132 following each other in the transverse direction 131 border directly together and protrude alternating of the centre plane 139 of the contact plate 118 out to different sides of the contact plate 118. Of the contact plate the 118 to the anode 122 of the same gas cell unit 114 associated KAE unit of 116 protruding anode-lateral contact contacts is upward and thus with the reference symbol 132a, which are of the contact plate 118 downward and thus to the cathode 128 a neighbouring gas cell unit 114 associated of the KAE unit 116 protruding cathode-lateral contact contacts with the reference symbol 132b designated.

Everyone of the contact contacts 132 exhibits a centric, streifenförmigen contact range 137, at that it with an adjacent KAE unit 116 in electrically leading contact stands (see Fig. 4).

The contact contacts 137 of the anode-lateral contact contacts 132a of a contact plate 118 stand for associated KAE unit 116 with the substrate 121 and thus with the anode 122 of the same gas cell unit 114 in electrical surface contact, so daß Electrons of the respective anode 122 into the contact plate 118 to arrive can.

The cathode-lateral contact contacts 132b of the contact plates 118 stand in each case with the cathode 128 a neighbouring gas cell unit 114 associated of the KAE unit 116 in electrically conductive surface contact, so daß Electrons of the contact plate 118 at the cathode 128 to arrive can. In this way the contact plates make load reconciliation between the anodes 122 and the cathodes 128 along the pile direction 112 successive KAE units 116 for 118 possible.

At the ends of the gas cell block group 106 arranged contact plates 118 are connected (in graphically not represented way) with an external electric circuit run, in order to measure the electrical loads developing at these edge-constant contact plates 118.

The Kontaktfeld 134 formed from the contact contacts 132 (see Fig. 3) each contact plate 118 exhibits the structure of a corrugated sheet waved in the transverse direction 131 of the contact plate 118.

As best from Fig. 3 to see is, is embedded with the contact contacts 132 provided centric, essentially rectangular Kontaktfeld 134 each contact plate 118 in even, essentially rectangular gas guidance range 136 of the contact plate 118.

In the gas guidance range 136 each contact plate 118 are several, for example two, essentially circular gaseous fuel passages 142, which depresses from the gas cell units 114 gaseous fuel which can be supplied through the contact plate 118 serve, and several, for example three, essentially circular exhaust passages 152 trained, those depresses from exhaust gas, which surplus gaseous fuel and Verbrennungsprodukte, in particular, contain water, which can be exhausted from the gas cell units 114, through the contact plate 118 serve.

Furthermore each contact plate 118 is provided with a connecting flange 170 rotating along their edge, which itself essentially parallel to the pile direction 112 downward extended (see Fig. 4).

Everyone of the contact plates 118 is designed as sheet metal shaped part, which is formed from an essentially even, essentially rectangular sheet metal situation by coining/shaping and/or deep-drawing as well as by punching out or cutting the gaseous fuel passages 142 and the exhaust passages 152 out.

Also the fluid guidance frameworks 120 are formed as sheet metal shaped parts from an essentially even, essentially rectangular sheet metal situation.

As best from Fig. 3 to see is, exhibits each fluid guidance framework 120 an essentially rectangular, centric depressing opening 176 for depresses the KAE unit 116 the same gas cell unit 114.

This depressing opening 176 is surrounded by an essentially even, perpendicularly to the pile direction 112 aligned gas guidance range 178.

In the gas guidance range 178 of the fluid guidance framework 120 several, for example two, essentially circular gaseous fuel passages 182 are trained, which depresses from gaseous fuel through the fluid guidance framework 120 make possible.

Furthermore several, for example three, essentially circular exhaust passages 184 are trained in the gas guidance range 178, which depresses from exhaust gas which can be exhausted from the gas cell units 114 through the fluid guidance framework 120 make possible.

The gas guidance range 178 of each fluid guidance framework 120 is äu&szlig at its; eren edge with a connecting flange 186 provide, which itself of the gas guidance range 178 from essentially parallel to the pile direction 112 downward extended (see Fig. 4).

In each case a fluid guidance framework 120 and a contact plate 118 form together a housing 192 for a gas cell unit 114.

As from Fig. 4 to see is, embraces the connecting flange 186 of the fluid guidance framework 120 the connecting flange 170 of the contact plate 118. The lower edge of the connecting flange 170 of the contact plate 118 and the lower edge of the connecting flange 186 of the fluid guidance framework 120 are by means of a Schweiß 196 approaches gas-tight together fixed.

The Schweiß approaches 196 can for example in the Laserschweiß proceeded or in the Elektronenstrahlschweiß proceeded to be manufactured.

As from Fig. 3 to see is, are arranged in the range of the exhaust passages 152, 184 and in the range of the gaseous fuel passages of 142, 182 circular in each case supporting elements 200, which with a lower front surface at a contact plate 118 and with an upper front surface at a fluid guidance framework 120 pushes away. These supporting elements 200 serve to hold the contact plate 118 and the fluid guidance framework 120 of a housing 192 of a gas cell unit 114 distance from each other and to prevent such a squeezing of the housing 192 together by the clamping strength affecting when the assembling of the gas cell block group 106 the housing 192.

Everyone of the supporting elements 200 points radially aligned, the supporting element 200 from its inside to its Auß enseite interspersing gas depressing channels 210 up, around one gas-depresses from the inside to the Auß enseite the supporting element 200 (or in reverse direction) to make possible.

As from Fig. 3 to see is, is arranged between the lower surface each contact plate 118 and the top side of the fluid guidance framework 120 of a neighbouring gas cell unit 114 circular gas channel seals 212 arranged in the pile direction 112 under the contact plate concerned 118, which in each case an exhaust passage 152, 184 and/or a gaseous fuel passage 142, 182 umschließ EN.

Everyone of the gas channel seals 212 seals the gap between the adjacent contact plate 118 and the adjacent fluid guidance framework 120 gas-tight and forms electrical isolation between the adjacent contact plate 118 and the adjacent fluid guidance framework 120.

The gas channel seals 212 can cover for example in each case a gasket made of mica, in particular from Phlogopit.

The contact plates 118 and fluid guidance framework 120 with in each case the supporting elements 200 and gas channel seals 212, arranged following each other in the pile direction 112, between them limit several, for example for three, wastegas flues 214, which exhaust gas from the gaseous fuel areas 124 of the gas cell units 114 can enter and which are gas-tight from the oxidizing agent areas 130 of the gas cell units 114 separate by the gas channel seals 212 (see Fig. 2A).

In appropriate way the contact plates 118 and fluid guidance frameworks following each other in the pile direction 112 limit 120 with in each case the supporting elements 200 and gas channel seals arranged between them 212 several, for example two, gaseous fuel channels 216, which along the pile direction 112 and withdraw from which gaseous fuel by the gas depressing channels 210 in the supporting elements 200 into the gaseous fuel areas 124 of the gas cell units 114 can extend and which are gas-tight from the oxidizing agent areas 130 of the gas cell units 114 separate by the gas channel seals 212.

Furthermore the gaseous fuel area 124 of each gas cell unit is 114 separate from the oxidizing agent area 130 of a gas cell unit 114 gas-tight by a gaseous fuel space poetry 218 arranged in the pile direction 112 over it, their structure in the following with reference to the Fig. 5 one describes in detail.

As from Fig. 5 to see is, points the substrate 121 to the KAE unit 116 a consolidated Auß enbereich up, that along the entire extent of the substrate 121 and in which the thickness of the substrate 121 extends 220 by a Preß procedure on for example approximately 20% of the initial thickness, that heiß t of the thickness ungepreß ten range of the substrate 121, reduced is.

During this compression procedure the porosity of the substrate 121, that becomes heiß t the proportional portion of the gas-filled volume of the substrate 121 at the total volume of the substrate 121, in the consolidated Auß enbereich to almost zero reduces 220.

In order to reach this, the thickness in the consolidated Au&szlig becomes with a substrate 121, which exhibits a porosity of X %; enbereich 220 by the compression procedure preferably on (100 - X) % of the initial thickness reduces; in case of a porosity from 80% thus to 20% of the initial thickness.

The substrate 121 becomes with the lower surface 222 of the consolidated Auß enbereichs 220 on the fluid guidance framework 120 presented and by a Schweiß procedure, for example by Laserschweiß EN, Elektronenstrahlschweiß EN, Buckelschweiß EN or Kondensatorentladungsschweiß EN, gas-tight connected with the metallic material of the fluid guidance framework 120.

By the Schweiß procedure becomes in the consolidated Auß enbereich 220 of the substrate 121 no more porosity exhibiting gas density zone 224 in an educated manner, which itself of the lower surface 222 up to the top side 226 of the consolidated Auß enbereichs 220 by the consolidated Auß enbereich through and forms along the entire extent of the substrate 121 an extending gas density barrier extends 220 of the substrate 121, which one gas-depresses from that auß erhalb the gas densities zone 224 lying boundary region 228 in of the gas densities zone 224 umschlossenen internal area 230 of the substrate 121 just like one gas-depressed in reverse direction prevents.

Instead of by Verschweiß EN of the substrate 121 with the fluid guidance framework 120 knows the gas density zone 224 in the consolidated Auß enbereich 220 of the substrate 221 also by soldering the substrate 121 with the fluid guidance framework 120 to be formed. The used plumb bob becomes due to the capillary effect into the still existing pores and passage channels in the consolidated Auß enbereich 220 of the substrate 121 in-sucked and verschließ t these passages permanently, so daß one itself over the entire height of the consolidated Auß enbereichs originates in to 220 extending gas density zone 224.

As from Fig. 5 furthermore to see is, extends the gas density electrolyte 126 of the KAE unit 116 over the edge of the gas-permeable anode 122 and over the edge of the gas-permeable cathode 128 outside and lies with its lower surface directly on the top side 226 of the consolidated Auß enbereichs 220 of the substrate 221 up.

This directly on the substrate 121 arranged Auß enbereich extends 232 of the electrolyte 126 to the edge of the substrate 121 so far after auß EN, daß it the gas density zone 224 covered and thus that internal area 230 of the substrate 121 is gas-tight from the oxidizing agent area 130 lying over that electrolytes 126 separate, without daß for this gas density separation an additional sealing medium is needed.

The Auß enbereich 232 the electrolytes the 126 forms thus together with the gas densities zone 224 of the consolidated Auß enbereichs 220 of the substrate 121 a gas density gaseous fuel space poetry 218, which separates the oxidizing agent area 130 arranged above the fluid guidance framework 120 gas-tight from the gaseous fuel area 124 arranged below the fluid guidance framework 120.

The structure of the gas-permeable substrate 121 becomes in the following with reference to the Fig. 6 and 7 describes.

As from Fig. 7 to see is umfaß t the substrate 121 an upper, electrode-lateral layer 280, on whose top side 282 the anode 122 of the KAE unit 116 is arranged, and a lower, gaseous fuel-spacelateral layer 284, whose lower surface 286 is turned to the gaseous fuel area 124.

Both layers 280, 284 of the substrate are formed from in each case a Drahtgestrick 288, which schematically in Fig. is represented to 6 and of schlingenförmig interlinking meshes 290 consists.

The distance of the meshes 290 292 Maschenreihen 294 of the Drahtgestricks 288 successive in the cord direction corresponds to the mesh length I (see Fig. 6), while the distance corresponds each other neighbouring meshes to 290 the same Maschenreihe 294 perpendicularly to the cord direction 292 of the taken mesh size w.

As from Fig. 6 to see is, over-cross the meshes 290 successive Maschenreihen 294 at contact points 296.

A course of the Drahtgestricks 288 is manufactured either on a Flachstrickmaschine or formed by cutting open and flat putting of a Drahtgestrickschlauches manufactured on a round cord machine.

The multi-layer Drahtgestrickschicht 280 is formed from a course of the Drahtgestricks 288, as this course is folded repeated.

In Fig. 7 represented achtlagige layer 280 one manufactures for example by threefold folding of a course of the Drahtgestricks 288.

The meshes 290 different situations of 298 of the layer 280 over-cross thereby on in the Fig. 7 contact points represented schematically by the points 296 '.

The gaseous fuel-spacelateral layer 284 of the substrate 121 is formed folds of a course of a Drahtgestricks 288 in the same way as the electrode-lateral layer 280 by repeated, for example three-way, whereby the Drahtgestrick of the gaseous fuel-spacelateral layer 284 differs from the Drahtgestrick of the electrode-lateral layer 280 thereby, daß it from a wire with one größ eren diameters in an educated manner are grö&szlig and meshes 290 with one; eren mesh length l' and one größ eren mesh size w' as the Drahtgestrick 288 of the electrode-lateral layer 280 of the substrate 121 exhibits.

Also the meshes 290 292 Maschenreihen 294 of the Drahtgestricks 288 of the gaseous fuel-spacelateral layer 284 successive in the cord direction over-cross at contact points 296.

Likewise the meshes 290 each other neighbouring situations of 298 ' of the gaseous fuel-spacelateral layer 284 at contact points 296 ' over-cross.

As from Fig. 7 in front to see is, the electrode-lateral layer 280 with its lowest situation 298a on the highest situation of 298b of the gaseous fuel-spacelateral layer 284 of the substrate 121 is presented, whereby the meshes 290 of the Drahtgestricks of the electrode-lateral layer 280 and the Drahtgestricks of the gaseous fuel-spacelateral layer 284 at contact points 296 over-cross ".

In order to ensure the necessary mechanical firmness and a good electrical conductivity of the substrate 121 from its gaseous fuel-spacelateral lower surface 286 up to the electrode-lateral top side 282 of the substrate 121, the meshes 290 the Drahtgestricke 288 of the electrode-lateral layer 280 and the gaseous fuel-spacelateral layer 284 of the substrate 121 at the contact points 296, 296 ' and 296 are soldered with one another ".

As plumb bob in particular a metallic plumb bob can be used, which exhibits a fusing temperature lying above the operating temperature of the gas cell device 100.

In particular a plumb bob can be used, which nickel contains and for example from 70 weight % nickel, 19 weight % chrome predominantly and 11 weight % silicon is compound. Such a plumb bob exhibits a fusing temperature within the range of approximately 1000°C to approximately 1100°C.

In order to bring the plumb bob into the range of the contact points 296, 296 ' and 296 ", there are different possibilities.

For example can be intended, daß the Drahtgestricke 288 in each case from a metal wire 302 to be knitted, which with a plumb bob wire 304 from the plumb bob material is verzwirnt, so daß the plumb bob wire 304 the metal wire 302 helically surrounds (see Fig. 8).

The plumb bob wire 304 preferably exhibits a smaller diameter than the metal wire 302.

For example the diameter of the plumb bob wire can amount to approximately 0.01 mm up to approximately 0.02 mm, while the diameter of the metal wire amounts to 302 approximately 0.05 mm.

Preferably the diameter of the plumb bob wire 304 amounts to thus approximately 20% to approximately 40% of the diameter of the metal wire 302.

Alternatively or in addition to a Verzwirnung with a plumb bob thread can be intended, daß the metal wire 302, from which the Drahtgestricke 288 is formed, is provided with a coating from the plumb bob material, as for example the metal wire 302 before involving is led by a splashing, which is filled with the melted plumb bob.

Also in this case the layer thickness of the plumb bob material amounts to preferably approximate 20% to approximately 40% of the diameter of the metal wire 302.

The necessary plumb bob is thus brought specified to cases into that managing together with the metal wire into the respective Drahtgestrick 288.

The used metal wire 302 is preferably from a high temperature-steady steel in an educated manner, for example from the steel with the material NR. 1.4742 (after SEW 470), which exhibits the following composition: 0,08 weight % carbon, 1.3 weight % silicon, 0.7 weight % manganese, 18.0 weight % chrome, 1.0 weight % aluminum, remainder iron. Such a steel exhibits a good temperature stability up to 1000°C.

After manufacturing and joining the electrode-lateral layer 280 and the gaseous fuel-spacelateral layer 284 of the substrate 121 the substrate 121 in a furnace, preferably under vacuum, is warmed up briefly to a temperature above the fusing temperature of the plumb bob material, preferably to a temperature within the range of approximately 1000°C to approximately 1100°C, whereby the plumb bob melts, which each other moistens surfaces at the contact points of the 296, 296 ' and 296 " opposite wires and with solidifying during a cooling phase at the respective contact point 296, 296 ' or 296 " an electrically conductive and mechanically loadable soldered connection, following on the heating up, forms.

Alternatively or in addition to that managing described approach can be also intended, daß from the electrode-lateral layer 280 and the substrate 121 formed from the gaseous fuel-spacelateral layer 284 is immersed as a whole into melted plumb bob, whereby the plumb bob arrives in particular also into the range of the contact points 296, 296 ' and 296 ".

Surplus plumb bob can be removed by dripping off letting and/or by ejecting, whereby the Drahtgestrick in a rotary basket is arranged, from the substrate 121.

Also in this case 296 ' and 296 " soldered connections by the cooling guides to the Austauchen from the plumb bob bath at the contact points 296, which each other make a mechanical and electrically conductive connection between at the contact points the 296, 296 ' and/or 296 " over-crossing meshes 290, forms.

The substrate 121 provided with the soldered connections is brought by mechanical treatment, for example by cutting, into the desired form, in its Auß enbereich 220 consolidates and in that managing described way into the depressing opening 176 of a fluid guidance framework 120 used and with the fluid guidance framework 120 by Verschweiß EN or soldering gas-tight connected.

Anschließ end becomes the top side of the electrode-lateral layer 280 of the substrate 121 in an appropriate way, for example by a plasma spraying procedure, with the anode 122, which coats electrolytes 126 and the cathode 128 of the KAE unit 116.

Alternatively or in addition to that managing described approach can be also intended, daß the substrate 121 is dipped as a whole into a suspension of a plumb bob powder in a bindemittelhaltigen solvent and released and dried after the Austauchen from the suspension by dripping off letting and/or by ejecting from surplus suspension.

As bonding agents acrylates and/or Methacrylate are preferably used.

As solvents for example esters, e.g. 3-Methoxybutylacetat, and/or Ketone, e.g. Methylisobutylketon, and/or alcohols, e.g. Terpineol, or mixtures that can be used solvents managing specified.

The substrate 121 covered in this way with plumb bob powder is brought by mechanical treatment, for example by cutting, into the desired form, in its Auß enbereich 220 consolidates and in that managing described way into the depressing opening 176 of a fluid guidance framework 120 used and with the fluid guidance framework 120 by Verschweiß EN or soldering gas-tight connected.

Anschließ end the fluid guidance framework 120 with the substrate specified to it 121 on a temperature within the range of for example approximately 300°C to approximately 400°C one heats up, in order to remove the bonding agent.

Anschließ end the fluid guidance framework 120 with the substrate 121 briefly over the plumb bob fusing temperature one heats up, in order to melt the plumb bob powder and with the cooling guide the soldered connections at the contact points 296 to manufacture 296 ' and 296 ".

Alternatively or in addition to this approach can be also intended, daß the substrate 121 is dipped as a whole into a solution, which contains a bonding agent and a softener, and after the Austauchen from this solution one dries. Here a sticky coat stays on the substrate 121. In this way pre-treated substrate 121 becomes anschließ end as gleichmä&szlig as possible; industrial union with a plumb bob powder bepudert, whereby the plumb bob powder is held due to the sticky coat to the substrate 121.

As solvents for example esters, e.g. 3-Methoxybutylacetat, and/or Ketone, e.g. Methylisobutylketon, and/or alcohols, e.g. Terpineol, or mixtures that can be used solvents managing specified.

As bonding agents an acrylate and/or a Methacrylat can be used.

As softeners can be used for example Phthalsäureester, e.g. Dioctylphthalat or Dibutylphthalat.

In such a way prepared substrate is brought by mechanical treatment, for example by cutting, into the desired form, in its Auß enbereich 220 consolidates and in that managing described way into the depressing opening 176 of a fluid guidance framework 120 used and with the fluid guidance framework 120 by Verschweiß EN or soldering gas-tight connected.

Anschließ end the fluid guidance framework 120 with the substrate specified to it 121 on a temperature within the range of approximately 300°C to approximately 400°C one heats up, in order to remove from immersing into the solution still existing bonding agents ago. Anschließ end the fluid guidance framework with the substrate 121 specified to it briefly over the fusing temperature of the plumb bob powder one heats up, on which with the cooling guide yourself the soldered connections at the contact points 296, 296 ' and 296 " to train.

With the two managing described procedures used plumb bob powders in particular a metallic plumb bob powder can be, which exhibits a fusing temperature lying above the operating temperature of the gas cell device 100.

In particular a plumb bob powder can be used, which nickel contains and for example from 70 weight % nickel, 19 weight % chrome predominantly and 11 weight % silicon is compound. Such a plumb bob exhibits a fusing temperature within the range of approximately 1000°C to approximately 1100°C.

Like in particular from Fig. 4 to see is, rests upon in the installed condition of a gas cell unit 114 the KAE unit 116 of the gas cell concerned 114 with the substrate 121 the anode-lateral contact contacts 132a of the contact plate 118 of the gas cell unit 114.

Furthermore the KAE unit 116 with the consolidated Au&szlig lies; enbereich 220 of the substrate 121 on the fluid guidance framework 120 the same gas cell unit 114 up, whereby the uncompressed range of the substrate 121 extends by the depressing opening 176 of the fluid guidance framework 120 through, the substrate 121 by Verschweiß ung or soldering at the fluid guidance framework 120 is fixed and the fluid guidance framework 120 by Verschweiß ung to the Schweiß 196 approaches or by soldering its connecting flange 186 with the connecting flange 170 of the contact plate 118 at the contact plate 118 is fixed.

The gas cell units 114 of the gas cell block group 106 are in such a way stacked on top of one another, da&szlig along the pile direction 112; the cathode-lateral contact contacts 132b of each contact plate 118 to the cathode of the KAE unit 116 of the gas cell unit 114 extend and in the electrically leading contact, arranged under it, against the same rest.

The gaseous fuel passages 142, 182 and the exhaust passages 152, 184 along the pile direction 112 successive gas cell units 114 swore with one another, in order to form so the gaseous fuel channels 216 and/or the wastegas flues 214.

As from Fig. 2 to see is, flows at the lower end of each gaseous fuel channel 216 in the same a gaseous fuel supply opening 234, which intersperses the lower end plate 108 of the gas cell block group 106 coaxially to the respective gaseous fuel channel 216.

To that the respective gaseous fuel channel 216 turned away end of the gaseous fuel supply opening 234 a line of branch of gaseous fuel 236 is attached, which of a gaseous fuel supply line 238 (see Fig. 1) branches, which is attached the housing of the gas cell device 100 gas-tight passed through and to (not represented) a gaseous fuel supply, which supplies a gaseous fuel, for example a kohlenwasserstoffhaltiges gas or a pure hydrogen to the gaseous fuel supply line 238, under a positive pressure of for example approximately 50 mbar.

The wastegas flues 214 of the gas cell block group 106 flow at their upper ends in each case into an exhaust exhausting opening coaxial to the wastegas flue concerned 214, which is attached the lateral upper end plate 111 interspersed and at their the respective wastegas flue 214 turned away end to in each case an exhaust branch line 242 (see Fig. 2).

These exhaust branch lines 242 flow into a common exhaust exhausting line 244 (see Fig. 1), which is attached gas-tight the housing 102 of the gas cell device 100 passed through and to (not represented) an off-gas treatment unit.

In the enterprise of the gas cell device 100 the gaseous fuel flows by the gaseous fuel supply line 238, which distributes itself lines of branch of gaseous fuel 236 and the gaseous fuel supply openings 234 into the two gaseous fuel channels in and from there by the gas depressing channels 210 of the gaseous fuel-channel-lateral supporting elements 200 on the gaseous fuel areas 124 of the gas cell units 114, which in each case by the contact plate 118, which fluid guidance framework 120 and the KAE unit 116 of the gas cell unit concerned 114 are enclosed.

As already described is at least partly oxidized, the gaseous fuel to the respective gaseous fuel area 124 limiting anode 122 of the respective KAE unit 116.

The oxidation product (water) arrives together with surplus gaseous fuel from the gaseous fuel areas 124 of the gas cell units 114 by the gas depressing channels 210 of the wastegas flue-lateral supporting elements 200 into the three wastegas flues, from which it by the exhaust exhausting openings, which exhaust branch lines 242 and the exhaust exhausting line 244 is exhausted to (not represented) the off-gas treatment unit.

In the off-gas treatment unit for example the reaction product (water) is removed from the exhaust gas stream, and will led surplus gaseous fuel to the gaseous fuel supply, in order the gas cell device 100 to be supplied again.

For the enterprise of the gas cell device of 100 needed oxidizing agents (for example air or pure oxygen) one supplies to the interior of the housing 102 by the oxidizing agent supply line 104.

In the interior of the housing 102 the oxidizing agent distributes itself on between the gaseous fuel areas 124 of the gas cell units of 114 trained oxidizing agent areas 130, which are enclosed by in each case a contact plate 118 of a gas cell unit 114 as well as by the fluid guidance framework 120 and the cathode 128 of the KAE unit 116 of a neighbouring gas cell unit 114.

Into the oxidizing agent areas inside and from the same the oxidizing agent arrives again out to a gas cell unit 114 and the contact plate 118 of the gas cell unit 114 by the gaps between in each case a fluid guidance framework 120, as far as these gaps are not covered by the supporting elements 200, following in the pile direction 112, which surround the gaseous fuel channels 216 and/or the wastegas flues 214.

As already described, from the oxidizing agent at the cathodes 128 of the KAE units 116 of the gas cell units 114 oxygen ions are formed, which walk by the electrolytes the 126 to the anodes 122 of the KAE units 116 of the gas cell units 114.

Surplus oxidizing agent arrived from the oxidizing agent areas 130 of the gas cell units 114 on the entrance side of the oxidizing agent opposite side outside and is exhausted by the oxidizing agent exhausting line 105 from the interior of the housing 102 of the gas cell device 100.

The direction of flow of the gaseous fuel and the exhaust gas by the gas cell device 100 is indicated in the designs as simple arrows 246, the direction of flow of the oxidizing agent by the gas cell device 100 by means of double arrows 248.

The direction of flow of the oxidizing agent by the oxidizing agent areas 130 is essentially parallel to the direction of flow of the gaseous fuel by the gaseous fuel areas 124.

Around the gas cell units 114 following each other along the pile direction 112 through äuß ere spanning to specify together, are several connecting bolts 250 (see Fig. 2) intended, which through-holes 252 in the middle upper end plate 110 of the gas cell block group 106 intersperse and are provided at their the respective screw head 254 turned away end with an external thread 256, which into in each case a tapped hole 258 in the lower end plate 108 of the gas cell group 106 is pivoted, so daß the middle upper end plate 110 and the lower end plate 108 by the connecting bolts 250 to be strutted against each other and a desired pressing force over the end plates 108, 110 to the centric, the Kontaktfelder 134 comprehensive range of the pile of the gas cell units 114 are transferable (see Fig. 2).

Furthermore several connecting bolts 260 are intended, which through-holes 262 in the lateral upper end plates 111 of the gas cell block group 106 intersperse and at their the respective screw head 264 turned away end with a Auß close-winds 266 are provided, which is pivoted into in each case a tapped hole 268 in the lower end plate 108, so daß the lateral upper end plates 111 and the lower end plate 108 by the connecting bolts 260 are against each other strutted and a desired pressing force over the end plates 108, 111 in the range of the gaseous fuel channels 216 and/or the wastegas flues 214 to the pile of the gas cell units 114 are transferable.

By those äuß ere spanning by means of the connecting bolts 250 and the middle upper end plate 110 produced pressing force determines the contact pressure, with that the contact contacts 132 against the substrate 121 and/or against the cathode 128 of the adjacent KAE unit 116 gepreß t become.

The contact pressure, with that the supporting elements 200 and the gas channel seals 212 against the contact plates 118 and the fluid guidance frameworks 120 gepreß t will, becomes ausschlie&szlig against it - independently of the spanning by means of the connecting bolts 250 and the middle upper end plate 110 -; lich by those äuß ere initial tension strength determines, with which the lateral upper end plates 111 by means of the connecting bolts 260 against the lower end plate 108 are strutted.

That managing described gas cell block group 106 is installed as follows:

1. First the individual gas cell units 114, by in each case a substrate 121 with its consolidated Au&szlig are installed; enbereich 220 on a fluid guidance framework 120 presented and in that managing described way by Verschweiß EN or soldering, under education gas densities of a zone 224 in the consolidated Auß enbereich 220, at the fluid guidance framework 120 one specifies. Anschließ end become on the substrate 121 the anode 122, which electrolyte 126 and the cathode 128 of the KAE unit 116, for example by plasma spraying, produced, whereby the electrolyte 126 is produced in the way, daß it the gas density zone 224 in the consolidated external area 220 of the substrate 121 gas-tight covers, in order to manufacture the gaseous fuel space poetry 218.

Anschließ end the contact plate 118 of the gas cell unit 114 to the plant at that to the KAE unit 116 turned away side of the substrate 121 one brings, and by Verschweiß the connecting flange 170 of the contact plate 118 is gas-tight connected to EN or soldering with the connecting flange 186 of the fluid guidance framework 120.

Whereupon the gas cell group 106 from the individual gas cell units 114 is built up, as the desired number of gas cell units 114 along the pile direction 112 is stacked and the gas cell units 114 are fixed to connecting bolts 250, 260 strutting against each other relatively to each other by means of the end plates 108, 110, 111 and the end plates in their situation.