LAMINATED SECONDARY BATTERY
    3.
    发明申请
    LAMINATED SECONDARY BATTERY 审中-公开
    层压二次电池

    公开(公告)号:US20120301791A1

    公开(公告)日:2012-11-29

    申请号:US13576792

    申请日:2011-01-28

    申请人: Ikuo Kojima

    发明人: Ikuo Kojima

    IPC分类号: H01M2/14

    摘要: The present invention aims at providing a laminated secondary battery in which no short circuit occurs even if an electrode sheet is not covered with an insulating resin. The present invention provides a laminated secondary battery in which positive electrode sheet 21 and a negative electrode sheet are stacked one on the other to face each other with separator 26 interposed therebetween, in which positive electrode sheet 21 or negative electrode sheet or both positive electrode sheet 21 and negative electrode sheet has/have fusion bonded portions 24 fused at intervals along a periphery of positive electrode sheet 21 or the negative electrode sheet, fusion seal portion 25 continuously fused along an inner periphery or an outer periphery of fusion bonded portions 24 or between adjacent fusion bonded portions 24, and separator protrusion portion 28, and the length (L1) of separator protrusion portion 28 satisfies the formula: L1≧L2×C, wherein L2 denotes the dimension of separator 26 in the longitudinal direction except for the length of separator protrusion portion 28, and C denotes the heat shrinkage factor of separator 26 in the longitudinal direction.

    摘要翻译: 本发明的目的在于提供即使电极片未被绝缘树脂覆盖也不发生短路的层压二次电池。 本发明提供了一种叠层二次电池,其中正电极片21和负电极片彼此层叠,以隔板26彼此相对,其中正电极片21或负电极片或两个正电极片 21和负极片具有熔融接合部分24,熔合部分24沿着正极片21或负极片的周边间隔地熔合,熔融密封部分25沿熔化接合部分24的内周或外周连续熔合, 相邻的熔接部24和隔板突出部28,隔板突出部28的长度(L1)满足下式:L1≥L2×C,其中,L2表示隔板26的长度方向的尺寸, 分离器突出部28,C表示隔板26在长度方向的热收缩率 。