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    • 1. 发明授权
    • Secondary battery
    • 二次电池
    • US07807292B2
    • 2010-10-05
    • US11746736
    • 2007-05-10
    • Kumiko TakagiFumiko HashimotoAkira YamaguchiYuzuru FukushimaHiroshi InoueYasufumi Minato
    • Kumiko TakagiFumiko HashimotoAkira YamaguchiYuzuru FukushimaHiroshi InoueYasufumi Minato
    • H01M6/12
    • H01M10/0587H01M4/38H01M4/386H01M4/387H01M10/0525
    • A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.
    • 能够确保足够的容量的电池,能够减小螺旋卷绕电极体内的压力分布的偏差,并且具有优异的充放电特性。 电池包括:螺旋卷绕的电极体,其中在带状阴极集电器上具有正极活性物质层的阴极和带状阳极集电器上的阳极活性物质层的阳极与隔板形成层叠 之间,螺旋缠绕在平面状态; 以及在螺旋卷绕的电极体的中心部分处连接到阴极集电体或阳极集电体的引线。 阴极活性物质层的内周端设置在螺旋卷绕电极体的短轴方向的内周端与引线不重叠的区域。