Patent ID: 7960053
Filing Date: 2011-06-14
Classification: H01M,Y02E,Y02P

Abstract:
1. A sealed battery having an electrode assembly which is composed of a positive-electrode plate and a negative-electrode plate wound together with a separator therebetween and housed in an outer can, one of the positive- and negative-electrode plates being electrically connected, via a current collector body, to a terminal of a seal cover, and the outer can being sealed closed by the seal cover, wherein the current collector body is a single-piece plate member that is housed in the outer can and that has a main body and a tab extending from the main body, the tab passing through an insulating ring that has a fan-shaped opening and bending back such that part of the insulating ring lies between a tip of the tab and the main body of the current collector body, the tip of the tab being in contact with the part of the insulating ring, and the main body is resistance welded to the electrode assembly, and the bent back tab is resistance welded to the terminal.