Patent ID: 8927123
Filing Date: 2015-01-06
Classification: H01M,Y02E,Y02P

Abstract:
1. A cap assembly of a cylindrical rechargeable battery comprising: a top cap, a positive temperature coefficient (PTC) element, a safety vent, and a current interruptive device (CID) in order; and a gasket covering the top cap, the PTC element, the safety vent, and the CID, wherein the safety vent has a downwardly indented center, wherein the CID has one upper end portion contacting the safety vent and one lower end portion connected to a positive electrode of an electrode assembly, wherein the gasket integrates a first gasket and a second gasket, the first gasket covering the top cap, the PTC element, and the safety vent and the second gasket covering the CID and insulating an edge surface of the CID from the safety vent, wherein the gasket is between the safety vent and the CID, wherein a depression is formed at a bottom surface of the integrated gasket, wherein the bottom surface of the integrated gasket contacts a top surface of the CID, to facilitate an insertion of the CID, wherein the depression is formed by a first flange depending from the bottom surface of the integrated gasket and a second flange depending from the bottom surface of the integrated gasket, the second flange spaced radially outwardly from the first flange, and wherein the CID contacts a radially inner surface of the first flange.