CYLINDRICAL TYPE ALKALINE STORAGE BATTERY

摘要

A cylindrical type alkaline storage battery includes a metallic case, a sealing plate for the metallic case, and a spiral-shaped group of electrodes. The group of electrodes includes a positive electrode plate, a negative electrode plate and a separator. The sealing plate includes a cap-shaped terminal plate, which includes a cap part and a flange, and a disc-shaped filter on the underside of the flange. The disc shaped filter has a gas venting hole in its center. A safety valve is included between the flange and the filter. A space between the metallic case and the rims of the flange and of the filter is sealed with a gasket.