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    ACTIVE MATERIAL FOR NEGATIVE ELECTRODE, NEGATIVE ELECTRODE PIECE, AND SECONDARY BATTERY
    82.
    发明申请
    ACTIVE MATERIAL FOR NEGATIVE ELECTRODE, NEGATIVE ELECTRODE PIECE, AND SECONDARY BATTERY 审中-公开

    公开(公告)号：US20190296356A1

    公开(公告)日：2019-09-26

    申请号：US16355416

    申请日：2019-03-15

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Yisong SU ,  Yongsheng GUO ,  Chengdu LIANG

    IPC: H01M4/60 ,  H01M10/04

    Abstract: A negative electrode active material, a negative electrode plate and a secondary battery. The negative electrode active material comprises a chelating resin and a metal ion. The chelating resin comprises a polymer skeleton and a chelating functional group. The chelating functional group is fixedly connected to the polymer skeleton via a chemical bond. The metal ion is connected with the chelating resin by an ionic bond and/or a coordinate bond via the chelating functional group. The chelating resin further comprises a free small molecular compound containing the chelating functional group. In the chelating resin, a mass percentage of the free small molecular compound containing the chelating functional is less than or equal to 1%. The metal ion is a divalent or multivalent metal ion. When the negative electrode active material is applied to the secondary battery, the secondary battery can achieve both high coulombic efficiency and high cycle stability.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    83.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 审中-公开

    公开(公告)号：US20190267670A1

    公开(公告)日：2019-08-29

    申请号：US16343448

    申请日：2017-07-18

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Zijun XU ,  Chunhua HU ,  Tiancheng YI ,  Yingjie ZHAN ,  Chengdu LIANG

    IPC: H01M10/0567 ,  H01M10/0525

    Abstract: Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.

    LITHIUM ION BATTERY, BATTERY MODULE, BATTERY PACK AND POWER CONSUMING DEVICE
    88.
    发明申请
    LITHIUM ION BATTERY, BATTERY MODULE, BATTERY PACK AND POWER CONSUMING DEVICE 有权

    公开(公告)号：US20230128934A1

    公开(公告)日：2023-04-27

    申请号：US18086217

    申请日：2022-12-21

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Hailin ZOU ,  Peipei CHEN ,  Chang PENG ,  Chengdu LIANG

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569

    Abstract: The present application provides a lithium ion battery, comprising an electrode assembly and an electrolyte comprising a fluorosulfonate and/or difluorophosphate substance. The lithium ion battery has a gas generation area coefficient during formation, defined as α, with α=M×S/200; wherein M is in the range of 5 mg/cm2-100 mg/cm2; S is the specific surface area of the negative electrode material on the negative electrode current collector and is in the range of 0.1 m2/g-10 m2/g; the lithium ion battery has a gas venting path coefficient defined as β, with β=100/L, wherein L is in the range of L≥50 mm; the mass percentage content w % of the fluorosulfonate and/or difluorophosphate substance in the electrolyte and α and β meet the equation 0.01≤w×β/α≤20.

    LITHIUM-ION SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND POWERED DEVICE
    90.
    发明申请
    LITHIUM-ION SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND POWERED DEVICE 有权

    公开(公告)号：US20220407115A1

    公开(公告)日：2022-12-22

    申请号：US17820944

    申请日：2022-08-19

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Chang PENG ,  Peipei CHEN ,  Hailin Zou ,  Chengdu LIANG

    IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567

    Abstract: A lithium-ion secondary battery is provided, where an electrolyte solution of the lithium-ion secondary battery comprises a highly heat-stable salt (My+)x/yR1(SO2N−)xSO2R2, where the My+ is a metal ion, R1 and R2 are each independently a fluorine atom, an alkyl with 1-20 carbon atoms, a fluoroalkyl with 1-20 carbon atoms, or a fluoroalkoxy with 1-20 carton atoms, x is 1, 2, or 3, and y is 1, 2, or 3. A mass percent of the salt in the electrolyte solution is set as k2%; a temperature rise coefficient k1 of the positive electrode sheet satisfies 2.5≤k1≤32, where k1=Cw/Mc, Cw is a positive electrode material load per unit area (mg/cm2) on the surface of any side of the positive electrode current collector on which a positive electrode material layer is loaded, and Mc is a carbon content (%) of the positive electrode material layer; and the lithium-ion secondary battery satisfies 0.34≤k2/k1≤8.

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