Patent ID: 6761995
Filing Date: 2004-07-13
Classification: H01M,Y02E

Abstract:
A coin-shaped battery comprising:a cathode case formed so as to have a cylindrical shape with a closed end; power generating elements housed in the cathode case; and an anode cap provided on an opening of the cathode case with a gasket interposed therebetween, the opening of the cathode case being sealed by crimping, wherein the anode cap having a reversed cylindrical shape with a closed end with respect to the cathode case, includes a flange in an opening thereof, the flange having, on a tip thereof, an extended portion in a cylindrical direction and a turn-up portion of the extended portion; the cathode case includes a rising portion, formed upwardly from a bottom face thereof so as to have an outer diameter smaller than an inner diameter of the extended portion in a periphery of the bottom face, and a crimp portion further extending from the rising portion; and the gasket is placed so as to be compressed between the crimp portion having a U-shaped cross section, the flange, the extended portion and the turn-up portion when the crimping is effectuated.