SECONDARY CELL AND ASSEMBLY SEALING PLATE FOR SECONDARY CELL

摘要

A secondary cell in which a flexible wiring board which has a through hole a nd is mounted with a safety circuit, an anode for controlled input-output and a cathode for safety circuit which respectively have gas vent holes and are in face contact with the upper surface of the wiring board, a PTC element which is in face contact with the lower surface of the wiring board, and a slitted valve body are united using inner gasket in one body. A sealing section is constituted at the central part by caulking a sub-filter which is welded to the valve body and has a through hole and the inner gasket at the periphery of a filter having a through hole. The cell can be handled similarly to the conventional single cell. When the gas pressure in the cell becomes abnormal ly high, the bursting of the cell is prevented by quickly discharging the gas.