Patent ID: 8017267
Filing Date: 2011-09-13
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A method for manufacturing a sealed battery, comprising: (1) using an outer can having a portion defining an opening, and a sealing plate having a portion defining a groove formed around or on a part of a fitting face of said sealing plate with said outer can, and inserting said sealing plate into said opening of said outer can so that a top face of said outer can is flush with a top face of a flange of said sealing plate being on an upper side of the groove; and (2) welding together said outer can and said sealing plate by applying a high energy ray to a fitting portion between said opening of said outer can and said top face of said flange of said sealing plate, wherein molten metal generated from said welding is deposited in said groove; wherein said groove is formed on a lower side of said top face of said flange of said sealing plate and said upper side of said groove is covered by said top face of said flange, and wherein the minimum distance from the top face of said flange of said sealing plate to the top of said groove being on a lower side of said flange is at least 0.1 mm.