发明名称 MANUFACTURING METHOD OF LITHIUM SECONDARY BATTERY
摘要 <P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a lithium secondary battery with an excellent productivity. <P>SOLUTION: The lithium secondary battery is manufactured by forming a wound inside electrode body or the like by winding a positive electrode plate 1A and a negative electrode plate through a separator, and connecting end parts of the positive electrode plate 1A and the negative electrode plate to a positive electrode current collecting member 4A made of aluminum or the like and a negative electrode current collecting member made of copper, respectively. The surface of respective connection parts 5 of the positive electrode current collecting member 4A and/or the negative electrode current collecting member are processed so as to have a center line average surface coarseness of 0.05 to 6.3 &mu;mRa. The connection parts 5 of the positive electrode current collecting member 4A is fused and welded to the end part 15 of the positive electrode plate 1A by a laser beam having a power density of 5 kW/mm<SP>2</SP>or higher, and/or the connection parts of the negative electrode current collecting member is fused and welded to the end part of the negative electrode plate by a laser beam having a power density of 3 kW/mm<SP>2</SP>or higher. <P>COPYRIGHT: (C)2004,JPO&NCIPI
申请公布号 JP2004220953(A) 申请公布日期 2004.08.05
申请号 JP20030007921 申请日期 2003.01.16
申请人 NGK INSULATORS LTD 发明人 OTSUBO SHINJI
分类号 H01M2/26;H01M2/22;H01M10/05;H01M10/052;H01M10/0585;H01M10/0587 主分类号 H01M2/26
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