Patent ID: 6794082
Filing Date: 2004-09-21
Classification: H01M,Y02E

Abstract:
An alkaline battery constructed of a cathode can and an anode cup in such a way that an open end of the cathode can is sealed by the anode cup, with a gasket interposed between the cathode can and the anode cup, wherein said alkaline battery comprisesthe open end of the anode cup is folded back in U-shape along its periphery and the fold is tightened for hermetic sealing by the internal periphery of the open end of the cathode can, with the gasket interposed between them, the anode cup has a tin coating layer formed in a limited region on the inside thereof excluding the bottom of the U-shaped fold and the outer periphery of the fold, the cathode can contains a cathode mix which contain silver oxide or manganese dioxide as the cathode active material incorporated with silver-nickelite (AgNiO2), the anode cup contains an anode mix which is mercury-free zinc or zinc alloy powder as the anode active material separated from the cathode mix by a separator, and the anode mix is impregnated with an alkaline electrolytic solution.