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    Lithium ion battery and electrolyte thereof
    4.
    发明授权
    Lithium ion battery and electrolyte thereof 有权

    公开(公告)号：US11581567B2

    公开(公告)日：2023-02-14

    申请号：US15896103

    申请日：2018-02-14

    申请人： Contemporary Amperex Technology Co., Limited

    发明人： Ming Zhang ,  Changlong Han ,  Hao Zhang ,  Cuiping Zhang

    IPC分类号： H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  C07F7/18 ,  C07F9/659

    摘要： The present invention provides a lithium ion battery and an electrolyte thereof. The electrolyte for the lithium ion battery includes a non-aqueous organic solvent, a lithium salt and additives, wherein the additives include additive A cyclophosphazene compound, additive B lithium fluorophosphate compound, and additive C selected from at least one of silane phosphate compound, silane phosphite compound and silane borate compound. Compared with conventional technologies, the nickel-rich positive electrode lithium ion battery using the electrolyte of the present invention has a desirable cyclic capacity retention rate, a desirable storage capacity retention rate and a low gas production at high temperature, and has a low DC internal resistance at low temperature, which can remarkably improve the thermal stability of lithium ion battery.

    Lithium-ion battery and electrical apparatus including the same
    5.
    发明授权
    Lithium-ion battery and electrical apparatus including the same 有权

    公开(公告)号：US11329319B2

    公开(公告)日：2022-05-10

    申请号：US17135600

    申请日：2020-12-28

    申请人： Contemporary Amperex Technology Co., Limited

    发明人： Hailin Zou ,  Ming Zhang ,  Changlong Han ,  Cuiping Zhang

    IPC分类号： H01M10/056 ,  H01M10/0567 ,  H01M50/538 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

    摘要： The present disclosure relates to a lithium ion battery including an electrode assembly; and an electrolytic solution for infiltrating the electrode assembly and an electrical apparatus including the same, wherein the electrode assembly includes an electrode body, a positive electrode tab, and a negative electrode tab. The electrode body includes a positive electrode plate, a negative electrode plate, and a separator that are wound together around an axis. The positive electrode plate includes a positive current collector and a positive electrode material layer provided on at least one surface of the positive electrode current collector. In an axial direction (X), the electrode body has two opposite side portions, and the positive electrode tab and the negative electrode tab extend from the two side portions of the electrode body, respectively. A diffusion rate v of the electrolytic solution to the electrode body is from 0.01 μg/s to 5 μg/s.

    LITHIUM-ION BATTERIES AND RELATED BATTERY MODULES, BATTERY PACKS AND DEVICES
    6.
    发明申请
    LITHIUM-ION BATTERIES AND RELATED BATTERY MODULES, BATTERY PACKS AND DEVICES 有权

    公开(公告)号：US20220021020A1

    公开(公告)日：2022-01-20

    申请号：US17320258

    申请日：2021-05-14

    申请人： Contemporary Amperex Technology Co., Limited

    发明人： Chengdu LIANG ,  Cuiping Zhang ,  Changlong Han ,  Ming Zhang ,  Peipei Chen ,  Hailin Zou

    IPC分类号： H01M10/0525 ,  H01M10/04 ,  H01M10/0585 ,  H01M10/0568 ,  H01M4/131 ,  H01M10/0567 ,  H01M10/0569

    摘要： This application relates to lithium-ion batteries and related battery modules, battery packs and devices. Specifically, the lithium-ion battery includes a positive electrode plate, a negative electrode plate, an electrolyte, and a separator, wherein the positive electrode plate includes aluminum foil as a positive electrode current collector, and a content of element copper atom as an impurity per unit area of the aluminum foil is from 0.009 g/m2 to 0.021 g/m2, and the electrolyte contains first lithium salt and additive A, and the first lithium salt is a fluorine-containing sulfonimide lithium salt, and relative to total molar amount of lithium salt in the electrolyte, the fluorine-containing sulfonimide lithium salt has a molar amount of 30 mol % or higher; and the additive A is at least one of a phosphate compound containing an unsaturated bond, a cyclic compound containing a —SO2— bond and a silicon-oxygen compound containing an unsaturated bond.

    Lithium ion battery
    7.
    发明授权
    Lithium ion battery 有权

    公开(公告)号：US11139471B2

    公开(公告)日：2021-10-05

    申请号：US16415043

    申请日：2019-05-17

    申请人： Contemporary Amperex Technology Co., Limited

    发明人： Ming Zhang ,  Hao Zhang ,  Cuiping Zhang ,  Changlong Han ,  Chenghua Fu

    IPC分类号： H01M4/60 ,  H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/02

    摘要： The present disclosure provides a lithium ion battery including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive electrode active material. The positive electrode active material includes a matrix, a first coating layer on the matrix in form of discrete islands, and a second coating layer on the first coating layer and the matrix as a continuous layer. The electrolyte includes an additive A and an additive B. The additive A is selected from a group consisting of cyclic sulfate compounds represented by Formula 1 and Formula 2, and combinations thereof, and the additive B is one or two selected from lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate.