SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

A secondary battery according to an embodiment of the present disclosure may include an electrode assembly; a battery case including an accommodation portion accommodating the electrode assembly, and a side portion located at an outer side of the accommodation portion and folded at least once; and a fixing member attached to the battery case and configured to fix the side portion in the folded state. The fixing member may have a cut-off line to allow the fixing member to easily rupture when an external force is applied to the fixing member.