Patent ID: 7833657
Filing Date: 2010-11-16
Classification: H01M,Y02E,Y02P

Abstract:
1. An external case for a secondary battery including a pouch type cell, the external case comprising: a base covering a lower surface of the pouch type cell; a pair of sidewalls joined with two opposing longer edges of the base to respectively form single linear boundaries, and covering two broad side surfaces of the pouch type cell; overlapping skirts extending from two longer edges of each of the sidewalls, and covering two narrow side surfaces of the pouch type cell; a plurality of semispherical locking lugs arranged on an outer side skirt of the overlapping skirts; and a plurality of circular locking holes arranged on an inner side skirt of the overlapping skirts into which the plurality of locking lugs are inserted, diameters of the plurality of circular locking holes correspond to diameters of the semispherical locking lugs, wherein the base, sidewalls, and skirts are of a metallic material.