Invention Grant
- Patent Title: Method of manufacturing cylindrical non-aqueous electrolyte secondary cell
- Patent Title (中): 制造圆柱形非水电解质二次电池的方法
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Application No.: US09163015Application Date: 1998-09-30
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Publication No.: US06193765B1Publication Date: 2001-02-27
- Inventor: Naoya Nakanishi , Hideyuki Inomata , Mitsuzou Nogami , Ikuo Yonezu , Koji Nishio
- Applicant: Naoya Nakanishi , Hideyuki Inomata , Mitsuzou Nogami , Ikuo Yonezu , Koji Nishio
- Priority: JP9-266172 19970930
- Main IPC: H01M602
- IPC: H01M602

Abstract:
A method of manufacturing a cylindrical non-aqueous electrolyte secondary cell according to the present invention comprises a first step of forming a lead-attaching area on which an active material layer is not formed, in a positive electrode wherein a positive electrode active material layer is formed on both sides of the positive electrode current collector and a negative electrode wherein a negative electrode active material layer is formed on both sides of the negative electrode current collector, and winding the positive electrode and the negative electrode with disposing a separator therebetween so that the lead-attaching areas are protruded from the edges of the separator, and a second step of disposing a lead at an end part of the lead-attaching area with interposing a metal plate having a multiplicity of holes, and thereafter laser-welding the lead and the metal plate and the lead-attaching area by applying a laser beam with a spot diameter larger than a hole diameter of the metal plate. According to the present invention, it is feasible to laser-weld a lead to a lead-attaching area without fear of a short circuit resulting from the fusion in an electrode assembly caused by a laser beam.
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