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    • 4. 发明申请
    • LITHIUM ION SECONDARY CELL
    • 锂离子二次电池
    • US20120202097A1
    • 2012-08-09
    • US13394909
    • 2010-08-11
    • Naoki KimuraTakenori Ishizu
    • Naoki KimuraTakenori Ishizu
    • H01M10/04H01M10/02H01M2/02
    • H01M10/0587H01M10/0525Y02T10/7011
    • In a lithium ion secondary cell including a wound group 20 in which a positive electrode 24 including a positive electrode mixture layer 5 and a negative electrode 22 including a negative electrode mixture layer 6 are wound with the interposition of separators 21, 23, a winding starting edge 22S is disposed more towards an inner peripheral side than the positive electrode 24; a winding ending edge 22E is disposed more towards an outer peripheral side than a winding ending edge 24E; the winding starting edges 24S, 22S, and the winding ending edges 24S, 22E are disposed within a flat portion of the wound group 20; and the negative electrode mixture layer 6 covering a surface of the positive electrode mixture layer 5 is disposed on an inner and an outer circumferential surface of the positive electrode mixture layer 5.
    • 在包括卷绕组20的锂离子二次电池中,其中包括正极合剂层5的正极24和包含负极混合物层6的负极22缠绕有隔离层21,23,绕组起始 边缘22S更靠近正极24的内周侧设置; 卷绕结束边缘22E比卷绕结束边缘24E更靠外侧设置; 卷绕起始边缘24S,22S和卷绕终止边缘24S,22E设置在卷绕组20的平坦部分内; 覆盖正极复合层5的表面的负极合剂层6配置在正极合剂层5的内周面和外周面上。