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    • 94. 发明授权
    • Cylindrical secondary battery
    • 圆柱二次电池
    • US07771863B2
    • 2010-08-10
    • US11942286
    • 2007-11-19
    • Takayuki MitaniKatsunori Suzuki
    • Takayuki MitaniKatsunori Suzuki
    • H01M2/12
    • H01M2/1241H01M2/022H01M2/0413H01M2/345H01M10/052
    • A cylindrical secondary battery where safety can be secured even when an external pressure accompanying rapid deformation of the battery acts on the battery is provided in a battery having a large capacity. A lithium ion secondary battery has a capacity of 14 Ah, where an upper lid is fixed to a battery can which receives an electrode winding grope therein. The upper lid includes a diaphragm 2 formed with a rupturing valve and an upper lid cap whose peripheral edge portion is fixed to a peripheral edge portion of the diaphragm 2. The rupturing valve includes a rupturing groove 8 with a V-shaped section formed on a surface of the diaphragm 2 positioned on the side of the upper lid cap and a rupturing groove 18 with a U-shaped section formed on a surface of the diaphragm 2 positioned on the side of the electrode winding group so as to correspond to the position of the rupturing groove 8.
    • 即使在伴随电池的快速变形的外部压力作用在电池上的情况下也可以确保安全性的圆筒形二次电池设置在具有大容量的电池中。 锂离子二次电池的容量为14Ah,其中上盖固定在电池壳体上,该电池罐容纳电极绕组。 上盖包括形成有断裂阀和上盖盖的隔膜2,其周缘部分固定到隔膜2的周缘部分。断裂阀包括具有V形截面的破裂槽8, 位于上盖盖一侧的隔膜2的表面和形成在隔膜2的位于电极绕组组一侧的表面上的U形截面的开槽槽18,以对应于电极绕组组的位置 破裂槽8。