| CPC H01M 50/102 (2021.01) | 20 Claims |
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1. A case for a secondary battery, in which an electrode assembly having a structure, in which electrodes and separators are alternately disposed, is accommodated, the case comprising:
a first recess part having a recessed shape and extending along a first plane;
a second recess part provided at one side of the first recess part and having a recessed shape, the second recess part extending along a second plane;
a circumferential part configured to surround a circumference of each of the first recess part and the second recess part when the case is unfolded; and
a connection part provided between the first recess part and the second recess part to connect the first recess part to the second recess part,
wherein, when the case is unfolded, the connection part has a shape that is recessed from each of the first recess part and the second recess part in one direction, and a stepped portion is provided on each of an area at which the first recess part and the connection part are connected to each other and an area at which the second recess part and the connection part are connected to each other,
wherein, when the case is unfolded with no external forces thereon, the first and second planes are angled with respect to one another to define a V-shape therebetween.
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