Battery equipped with opening sealing device.

摘要

A battery equipped with an opening-sealing device for sealing an opening of a battery case. The opening-sealing device comprises a dish-like sealing plate having a downwardly protruding portion with a valve through-hole, a valve provided on the dish-like sealing plate so as to cover the valve through-hole and a terminal cap provided on the valve and having a cutter protruded downwardly toward the valve. The valve and terminal cap are firmly held by the dish-like sealing plate with a circumferential portion of the dish-like sealing plate being bent inwardly to the valve and the terminal cap. The valve has a three-layer construction comprising a metallic thin plate, a non-adhesion type resin film and a heat-adhesion type resin film. The non-adhesion type resin film is provided on one surface of the metallic thin plate so as to face the terminal cap and the heat-adhesion type resin film is provided on the other surface of the metallic thin plate so as to face the dish-like sealing plate and adhered to the dish-like sealing plate by heating.