COIN BATTERY SEPARATOR FORMING DIE DEVICE FOR COIN BATTERY AND SEPARATOR FORMING AND ASSEMBLING DEVICE FOR COIN BATTERY

摘要

PROBLEM TO BE SOLVED: To firmly lock a separator for a coin battery into a negative electrode case. SOLUTION: An outer periphery portion of the separator 31 having an upper and lower double-layer structure is provided with an outer periphery bent portion 31a having an inner periphery side portion 31c and an outer periphery side portion 31d bent in approximately V-shaped or U-shaped cross section. The outer periphery side portion 31d of the outer periphery bent portion 31a of the separator 31 is elastically crimped against the inner periphery face of an outer periphery portion 2a of the negative electrode case 2.