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    • 3. 发明申请
    • SECONDARY BATTERY
    • 二次电池
    • US20150214553A1
    • 2015-07-30
    • US14513112
    • 2014-10-13
    • SAMSUNG SDI CO., LTD.
    • Seungyeol YooJongseok MoonHuijun LeeJunyong Lee
    • H01M4/70
    • H01M4/70H01M2/26H01M10/0587
    • A secondary battery according to embodiments of the present invention can reduce or prevent an uncoated portion and the rest of an electrode assembly from being damaged when the uncoated portion and a collector plate are coupled to each other using laser welding. The secondary battery includes a case having an internal space, an electrode assembly accommodated in the case, the electrode assembly having a coated portion coated with an active material and an uncoated portion without the active material, and a collector plate including a first collector plate and a second collector plate coupled to the uncoated portion, wherein first protrusions of the first collector plate and second protrusions of the second collector plate are engaged with each other with the uncoated portion interposed therebetween, and a boundary surface between the first protrusions and the second protrusions is configured to deviate with respect to a direction in which the collector plate is coupled to the uncoated portion.
    • 根据本发明的实施例的二次电池可以减少或防止未涂覆部分和电极组件的其余部分在未涂覆部分和集电板彼此使用激光焊接而被损坏。 二次电池包括具有内部空间的壳体,容纳在壳体中的电极组件,电极组件具有涂覆有活性材料的涂覆部分和没有活性材料的未涂覆部分,以及集电板,其包括第一集电板和 耦合到未涂覆部分的第二集电板,其中所述第一集电板的第一突起和所述第二集电板的第二突起彼此接合,并且所述第一集电板的第二突起与所述第一突起和所述第二突起之间的边界面相互接合, 被配置为相对于集电板联接到未涂覆部分的方向偏离。