Patent ID: 6432578
Filing Date: 2002-08-13
Classification: H01M,Y02P

Abstract:
A sealed cell comprising:a cell outer can having a hollow body with a bottom and an opening; a spirally-wound electrode body accommodated in said cell outer can, including a first electrode plate and a second electrode plate wound with a separator; a sealing lid having a sealing plate sealed to said opening of the cell outer can; and a first current collector tab derived from a portion of an exposed core body of the first electrode plate on an outermost periphery of said spirally-wound electrode body; wherein: the first current collector tab, the cell outer can and the sealing plate are welded with a tip of said first current collector tab being held between said sealing plate and an open rim of said cell outer can; and said tip of the first current collector tab is welded at a position in said open rim, wherein the first current collector tab includes a bent portion, whereby a disconnection of the first current collector tab caused by a movement of the spirally-wound electrode body is prevented.