Patent attributes
A cylindrical battery gasket that will not functionally deteriorate in absorbing stress caused by the gasket extending radially upon the battery being sealed is provided with a boss part with a central hole through which a negative electrode collector is inserted, a canister contact part that is affixed in place and in contact with a cathode canister, a disk-shaped part that is provided to connect the boss part to the canister contact part, and a stress buffering part that is provided on the way to the disk-shaped pat. The stress buffering part has a first bent part and a second bent part, both of an acute angle, and is set nearer the center of the cathode canister than to the positive electrode mixture, upon the gasket being installed in the cathode canister.
