Patent ID: 6632558
Filing Date: 2003-10-14
Classification: H01M,Y02P,Y10T

Abstract:
A battery comprising:a can for containing electrochemically active materials including positive and negative electrodes and an electrolyte, said can having a first end, an open second end, side walls extending between said first and second ends, and an end wall extending across said first end; a pressure relief mechanism formed in said end wall of said can for releasing internal pressure from within said can when the internal pressure becomes excessive; a first outer cover positioned on said end wall of said can to be in electrical contact therewith and to extend over said pressure relief mechanism; a second outer cover positioned across the open second end of said can; and an insulator disposed between said can and said second outer cover for electrically insulating said can from said second outer cover, wherein said first outer cover includes a protrusion extending over and spaced from said pressure relief mechanism, and the protrusion provides an open space over said pressure relief mechanism so that said first outer cover does not interfere with said pressure relief mechanism.