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    Lithium ion battery and electrolyte thereof
    33.
    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

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Ming Zhang ,  Changlong Han ,  Hao Zhang ,  Cuiping Zhang

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

    Abstract: 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
    34.
    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

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Hailin Zou ,  Ming Zhang ,  Changlong Han ,  Cuiping Zhang

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

    Abstract: 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
    35.
    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

    Applicant: Contemporary Amperex Technology Co., Limited

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

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

    Abstract: 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
    36.
    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

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Ming Zhang ,  Hao Zhang ,  Cuiping Zhang ,  Changlong Han ,  Chenghua Fu

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

    Abstract: 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.

    Lithium-ion battery and its electrolyte
    37.
    发明授权
    Lithium-ion battery and its electrolyte 有权

    公开(公告)号：US10971757B2

    公开(公告)日：2021-04-06

    申请号：US15572593

    申请日：2017-08-24

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Jiqiong Liu ,  Changlong Han ,  Xiaomei Wang ,  Jianwei Zhu ,  Yan Zhou ,  Feng Huan ,  Kun Yu

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587

    Abstract: The present invention discloses a Lithium ion battery and an electrolyte thereof, the electrolyte comprising an organic solvent, a lithium salt and an additive. The additive comprises a cyclic fluoro carbonate (A), a cyclic phosphazene (B), a cyclic sulfate and a lithium fluoro oxalate borate (D). The lithium fluoro oxalate borate (D) has following formula: Compared with the prior art, the electrolyte of the present invention may form a stable CEI and SEI film on the surface of positive and negative electrodes, protect the interface between positive and negative electrodes, improve the acidic atmosphere of Lithium ion battery electrolyte, and reduce the damage effect of HF on the interface between positive and negative electrodes, while reducing low temperature resistance of lithium-ion battery, improving cycle life, high temperature storage performance, safety performance and rate capability of lithium-ion battery.

    Electrolyte and lithium-ion battery containing the same
    38.
    发明授权
    Electrolyte and lithium-ion battery containing the same 有权

    公开(公告)号：US10381681B2

    公开(公告)日：2019-08-13

    申请号：US15606387

    申请日：2017-05-26

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Shaowei Feng ,  Songjun Shi ,  Changlong Han

    IPC: H01M4/02 ,  H01M4/62 ,  H01M4/66 ,  H01M4/131 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

    Abstract: The present application relates to the technical field of lithium-ion batteries and, specifically, relates to an electrolyte and a lithium-ion battery containing the electrolyte. The electrolyte of the present application comprises an organic solvent, a lithium salt and an additive, wherein the additive contains a cyanosulfone compound and a lithium fluorophosphate compound. When the electrolyte contains both the cyanosulfone compound and the lithium fluorophosphate at the same time, the cyanosulfone compound will form a passive film on the surface of the electrode of a high-voltage battery, so as to effectively suppress reaction between the electrolyte and the electrode, further, the lithium fluorophosphate can effectively suppress the decomposition of the lithium salt and improve the film resistance of the electrode. Under the synergistic effect of the two, the cycle performance of the lithium-ion battery is greatly improved, and the storage performance of the electrolyte is also significantly improved.

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