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    • 3. 发明公开
    • SECONDARY BATTERY
    • 二次电池
    • EP3321993A1
    • 2018-05-16
    • EP17185927.5
    • 2017-08-11
    • Contemporary Amperex Technology Co., Limited
    • LI, XiangCAI, RulaiWANG, PengYANG, Wei
    • H01M2/04H01M2/34
    • H01M2/345H01M2/0426H01M2/0473H01M2/0486H01M2/06H01M2/30H01M2/348H01M2200/103H01M2200/20
    • A secondary battery, including an electrode assembly, a positive terminal, a negative terminal, a top cover plate, a conductive plate and a contact plate, wherein the electrode assembly includes a positive electrode plate, a negative electrode plate and a separator provided therebetween, the positive electrode plate is electrically connected with the positive terminal, and the negative electrode plate is electrically connected with the negative terminal, the contact plate is attached to the negative terminal, the top cover plate is insulated from the negative terminal and is electrically connected with the positive terminal, the conductive plate is fixedly connected with the top cover plate, the contact plate is configured to deform under gas pressure to be in contact with the conductive plate when an internal pressure of the secondary battery exceeds a reference pressure, so as to form an electrical connection path passing through the positive electrode plate, the positive terminal, the top cover plate, the conductive embedded block, the contact plate, the negative terminal and the negative electrode plate, and a resistivity of the conductive embedded block is greater than or equal to a resistivity of the contact plate, and is less than a resistivity of the top cover plate. This solution reduces potential risks of fuse of the top cover plate and the contact plate.
    • 一种二次电池,包括电极组件,正极端子,负极端子,顶盖板,导电板和接触板,其中所述电极组件包括正极板,负极板和设置在其间的隔板, 正极板与正极端子电连接,负极板与负极端子电连接,接触板与负极端子连接,顶盖板与负极端子绝缘并与负极端子电连接 所述正极端子,所述导电板与所述顶盖板固定连接,所述接触板构造成在所述二次电池的内部压力超过参考压力时在气压下变形以与所述导电板接触,以便 形成穿过正极板(正极端子)t的电连接路径 上盖板,导电嵌入块,接触板,负极端子和负极板,导电嵌入块的电阻率大于或等于接触板的电阻率,小于电阻率 的顶盖板。 该解决方案降低了顶盖板和接触板的熔断器的潜在风险。