Patent ID: 6284403
Filing Date: 2001-09-04
Classification: H01M,Y02E

Abstract:
A closure assembly for a sealed battery comprising:an insulating gasket;a metal plate having a hole;a first insulating sheet;a metal cap forming an external electrode terminal wherein the metal plate, the first insulating sheet, and the metal cap are laid on top of one another within the insulating gasket;the metal plate and the metal cap being electrically connected through a punched hole provided in the first insulating sheet, a pressure receiving portion defined in one part of the first insulating sheet conforming in position to the punched hole of the metal plate; anda periphery of the pressure receiving portion being restricted by the metal cap and the metal plate, so that, upon an increase in pressure within the battery, the pressure receiving portion of the first insulating sheet expands so as to relieve the pressure within the battery.