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    • 4. 发明申请
    • NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 非电解电解质二次电池
    • WO2016056170A1
    • 2016-04-14
    • PCT/JP2015/004595
    • 2015-09-09
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • HARAYAMA, TakashiONIZUKA, Hiroshi
    • H01M10/42H01M10/0525H01M10/0587H01M10/04
    • H01M10/4235H01M10/0431H01M10/0525H01M10/0566H01M10/0587H01M2300/0091Y02T10/7011
    • A lithium ion battery 100 has a flat wound electrode assembly 20, a nonaqueous electrolyte, and a battery case 10. The nonaqueous electrolyte contains an electrically insulating inorganic aggregate 16 and is formed of an impregnating electrolyte that is impregnated into the flat wound electrode assembly 20 and a surplus electrolyte that is not impregnated into the flat wound electrode assembly 20. Letting the flat wound electrode assembly 20 be divided into a planar region P where the electrode surfaces are planar surfaces and a lower wound curved region R L which is positioned vertically downward from the planar region P and where the electrode surfaces are curved, a boundary plane B that includes the boundary between the planar region P and the lower wound curved region R L , the amount M O of the inorganic aggregate 16 included in a space which is below the boundary plane B and the amount M I of the inorganic aggregate 16 included in the impregnating electrolyte within the flat wound electrode assembly 20 satisfy the relationship M O > M I .
    • 锂离子电池100具有扁平卷绕电极组件20,非水电解质和电池壳10.非水电解质含有电绝缘性无机骨料16,并且由浸渍在扁平卷绕电极组件20中的浸渍电解质形成 以及没有浸渍到扁平卷绕电极组件20中的剩余电解质。使扁平卷绕电极组件20被分成平面区域P,其中电极表面是平面表面,并且下卷绕弯曲区域RL位于从 平面区域P并且电极表面弯曲的边界平面B包括平面区域P和下部卷绕弯曲区域RL之间的边界,包括在边界以下的空间中的无机骨料16的量MO 平面B和包含在浸渍电解质中的无机骨料16的量MI ctrode组件20满足MO> MI的关系。