Patent ID: 6270919
Filing Date: 2001-08-07
Classification: H01M,Y02E

Abstract:
An electrochemical cell comprising:a container having a closed bottom end and an open top end;a positive electrode disposed in said container;a negative electrode disposed in said container;a separator disposed between said positive electrode and said negative electrode;an electrolyte disposed in said container;a seal member disposed in the open top end of said container for closing said open top end of said container, said seal member having a stress concentrator formed about a central longitudinal axis of said cell for providing pressure release to vent gases;a cover disposed in said open end of said container and substantially covering said seal member, said cover having at least one opening formed therein; anda standoff member disposed between a top surface of said seal member and a bottom surface of said cover for distancing at least a portion of said seal member from said cover to prevent resealing of said seal member when said seal member vents, wherein said standoff member comprises at least one post formed on the top surface of said seal member.