Patent ID: 7393611
Filing Date: 2008-07-01
Classification: H01M,Y02E,Y02P

Abstract:
1. A sealed rechargeable battery, comprising: a metal case having an elliptical or rectangular cross section; a metal sealing plate for sealing an opening at one end of the case; and an electrode plate assembly, the electrode plate assembly being housed in the case together with an electrolyte solution, both longer side faces of the case including continuous or discontinuous projecting ridges which are disposed in opposed respective positions of said side faces between a bottom face opposite to the opening and said opening, said projecting ridges extending to the bottom face and to the opening; wherein said electrode plate assembly includes positive and negative electrode end faces, one of the electrode end faces and the sealing plate are connected to each other by welding portions between the opposed projecting ridges, and the bottom face of the case and the other electrode end face are connected to each other by welding portions between the opposed projecting ridges and a periphery of said sealing plate includes outwardly projecting portions corresponding to the projecting ridges whereby said welding portions are formed over substantially a full width of the positive and negative electrode faces.