BATTERY CASE FOR SECONDARY BATTERY

摘要

Disclosed herein is a battery case including a receiving part having an electrode assembly mounted therein, wherein the receiving part, which is formed by deforming a sheet type base material, is configured to have a stair-like structure in which at least one corner and/or surface forming a shape of the receiving part is deformed.

主权项

1. A method of manufacturing a battery cell having an electrode assembly mounted in a battery case having a receiving part including an electrode assembly mounted therein, wherein the receiving part, which is formed by deforming a sheet type base material, is configured to have a stair-like structure in which at least one corner and/or surface forming a shape of the receiving part is deformed, the method comprising:
(a) placing the sheet type base material on a die having a groove; (b) pressing the sheet type base material into the groove of the die using a punch, an outside of which is configured to have an asymmetric structure, such that wrinkles and chlorosis do not occur at corners of a receiving part formed from the sheet type base material; (c) mounting the electrode assembly in the receiving part; and (d) placing a cover on the receiving part to seal the receiving part, wherein the groove of the die is formed in a shape corresponding to that of an outside of the punch such that the sheet type base material coincides with the shape of the outside of the punch when the sheet type base material contacts the punch and the groove of the die.