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    Lithium-ion secondary battery
    1.
    发明公开
    Lithium-ion secondary battery 有权
    锂离子二次电池

    公开(公告)号：EP2003716A1

    公开(公告)日：2008-12-17

    申请号：EP08153469.5

    申请日：2008-03-27

    申请人： Hitachi Vehicle Energy, Ltd.

    发明人： Nakai, Kenji ,  Tada, Akinori ,  Sato, Seiichi ,  Arai, Masatsugu c/o Mechanical Engineering

    IPC分类号： H01M2/26 ,  H01M10/04

    CPC分类号： H01M10/0525 ,  H01M2/263 ,  H01M10/0431 ,  H01M10/0587 ,  Y02T10/7011

    摘要： A lithium-ion secondary battery is provided where a current collecting disk and a current collector foil are joined to each other securely while damage of the foil is suppressed. The lithium-ion secondary battery is provided with a winding group obtained by winding a positive electrode plate and a negative electrode plate via a separator. An uncoated area of the positive electrode current collector foil and an uncoated area of the negative electrode current collector foil project at an upper portion and a lower portion of the winding group, respectively. The current collecting disk (7) has projecting ridge portions on a face thereof opposite to the winding group and flat face portions facing the winding group at positions corresponding to the projecting ridge portions. The projecting ridge portions are formed radially. The end portion of the positive electrode mixture non-application portion and the end portion of the negative electrode mixture non-application portion are caused to abut on the flat face portions of the current collecting disks (7) and joining is performed by irradiating the projecting ridge portions with laser beam.

    摘要翻译： 提供一种锂离子二次电池，其中集电盘和集电箔彼此牢固地接合，同时抑制了箔的损坏。 锂离子二次电池设置有通过经由隔膜卷绕正极板和负极板而获得的绕组组。 正极集电箔的未涂布区域和负极集电箔的未涂布区域分别在卷绕组的上部和下部突出。 集电盘（7）在其与卷绕组相对的面上具有突出的脊部，在与突出的脊部相对应的位置上具有面对卷绕组的平坦面部。 突出的脊部沿径向形成。 使正极混合物非涂布部分的端部和负极混合物非涂布部分的端部邻接在集电盘（7）的平坦表面部分上，并且通过照射投影 带有激光束的脊部分。