Patent ID: 6060194
Filing Date: 2000-05-09
Classification: H01M,Y02E,Y02P

Abstract:
A gas-tight sealed button cell comprising:(a) an assembled lower casing comprising a lower container having a cup shape, a positive electrode in conductive contact with the lower container, a non-conductive separator, a lower casing edge, and an electrolyte; and(b) an assembled upper casing comprising an upper container having a peripheral substantially curved portion, a negative electrode in conductive contact with and centrally seated in the upper container, a sealing ring having a plurality of retaining tabs of substantially equivalent size for retaining and centering the negative electrode, a recessed area in each of the plurality of retaining tabs for receiving the curved portion of the upper casing, an upper casing edge, and an electrolyte;wherein the upper casing is positioned onto the lower casing and the lower casing edge is sealed over the upper casing edge.