11-12-2018 дата публикации
Номер: KR1020180131865A
Принадлежит:
Disclosed are a secondary battery and a method for manufacturing the same. According to the present invention, when an internal pressure of a pouch-type secondary battery increases by a certain level or more due to gas inside the secondary battery, the gas is effectively discharged to the outside, thereby making it possible to manufacture the secondary battery with increased safety. In order to achieve the objective, an aspect of the present invention provides a secondary battery comprising: an electrode assembly; and an outer case for accommodating the electrode assembly, wherein the outer case comprises a first outer case and a second outer case, and the first outer case and the second outer case adhere to each other to form an adhesion portion, a venting portion is formed in a part of the adhesion portion, and a thermal expansion coefficient of an expandable material, formed in a region where the first outer case and the second outer case adhere to each other in the venting portion, ...
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