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|1. (WO2018043907) POUCH-TYPE SECONDARY BATTERY AND BATTERY MODULE COMPRISING SAME|
|Applicants:||LG CHEM, LTD.
|Title:||POUCH-TYPE SECONDARY BATTERY AND BATTERY MODULE COMPRISING SAME|
Disclosed are a pouch-type secondary battery and a battery module comprising the same. A pouch-type secondary battery according to an embodiment of the present invention comprises: an electrode assembly; a case for containing the electrode assembly; an electrode tab extending from the electrode assembly; and an electrode lead electrically connected to the electrode tab and exposed to the outside of the case, wherein the case has a variable-length portion formed thereon such that, when swelling occurs, the volume of the case can increase.