Current interrupt device for rechargeable cells
    1.
    发明授权
    Current interrupt device for rechargeable cells 失效
    可充电电池的电流中断装置

    公开(公告)号:US06900616B2

    公开(公告)日:2005-05-31

    申请号:US10442732

    申请日:2003-05-21

    IPC分类号: C09D5/00 H02J7/00 H01M10/46

    CPC分类号: C09D5/00 H02J7/0031

    摘要: A current interrupt device for rechargeable, electrochemical cells having a safety valve, insulating spacer and a thin metal plate for coupling to an electrode assembly is provided. The thin metal plate electrically couples to the safety valve by way of a conductive polymer, preferably having a positive temperature coefficient characteristic. The positive temperature coefficient characteristic is such that the impedance of the polymer increases with increasing temperature. In normal operation, the polymer conducts current. In high current situations, where internal components heat due to parasitic resistances, the polymer becomes an insulator and disconnects the cell from the exterior can. When gasses build within the cell, the safety valve deforms, thereby causing the safety valve to separate from the thin metal plate. Once the safety valve and thin metal plate have separated, the electrode assembly is electrically isolated from the exterior can.

    摘要翻译: 提供了一种用于可充电电化学电池的电流中断装置,其具有安全阀,绝缘间隔件和用于耦合到电极组件的薄金属板。 薄金属板通过导电聚合物电连接到安全阀,优选具有正温度系数特性。 正温度系数特性使得聚合物的阻抗随着温度的升高而增加。 在正常操作中,聚合物传导电流。 在高电流情况下,由于寄生电阻而导致内部组件发热,聚合物变成绝缘体,并将电池与外壳断开。 当气体在电池内部积聚时,安全阀变形,从而使安全阀与薄金属板分离。 一旦安全阀和薄金属板分离,电极组件就会与外壳电隔离。