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    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    11.
    发明公开
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 审中-公开

    公开(公告)号：US20240258566A1

    公开(公告)日：2024-08-01

    申请号：US18626867

    申请日：2024-04-04

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

    IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

    CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

    Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, about 30 wt %≤Z≤about 50 wt %, and about 0.01≤(Y/Z)≤about 0.3; wherein the dinitrile compound is one or more compounds selected from adiponitrile, 1,4-dicyano-2-butene, and ethylene glycol bis(2-cyanoethyl) ether; and the trinitrile compound is one or more compounds selected from 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; 1,2,5-tris(cyanoethoxy)pentane; and any combination thereof.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    14.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20220407108A1

    公开(公告)日：2022-12-22

    申请号：US17885915

    申请日：2022-08-11

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

    IPC: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

    Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z; where about 2 wt %≤(X+Y)≤about 11 wt %, about 0.1≤(X/Y)≤about 8, and about 0.01≤(Y/Z)≤about 0.3. The dinitrile compound comprises a compound of Formula (5): N—R2—(O—R3)n—O—R4—CN (5). The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

    NEGATIVE ELECTRODE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE
    15.
    发明申请
    NEGATIVE ELECTRODE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220123288A1

    公开(公告)日：2022-04-21

    申请号：US17215484

    申请日：2021-03-29

    Applicant: Ningde Amperex Technology Limited

    Inventor： Bing JIANG ,  Kefei WANG

    IPC: H01M4/38 ,  H01M4/66 ,  H01M10/0562 ,  H01M4/62

    Abstract: A negative electrode includes a current collector and an active substance layer arranged on the current collector, and an ionic conductivity of the active substance layer is 0.01 S/m to 1 S/m. The ionic conductivity of the active substance layer is defined as 0.01 S/m to 1 S/m, so that the electrochemical device can meet requirements for fast charging, and meanwhile, lithium plating on a surface of the negative electrode of the electrochemical device can be inhibited in a fast-charging condition, ensuring safety performance of the electrochemical device.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    16.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20210028490A1

    公开(公告)日：2021-01-28

    申请号：US17064959

    申请日：2020-10-07

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

    IPC: H01M10/0566 ,  H01M10/0525

    Abstract: An electrolyte includes a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The trinitrile compound includes at least one selected from the group consisting of: 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; and 1,2,5-tris(cyanoethoxy)pentane. The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

    WOUND-TYPE BATTERY CELL
    17.
    发明申请
    WOUND-TYPE BATTERY CELL 审中-公开

    公开(公告)号：US20190393558A1

    公开(公告)日：2019-12-26

    申请号：US16454875

    申请日：2019-06-27

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Kefei WANG ,  Fei WU ,  Jinli WANG ,  Jibin GENG

    IPC: H01M10/0587 ,  H01M2/18 ,  H01M2/26 ,  H01M10/04 ,  H01M10/0525

    Abstract: A cell includes a flat electrode assembly formed by superposing and winding respective first ends of a first electrode sheet, a first separator, a second electrode sheet, and a second separator. A first electrode tab is connected to the first electrode sheet, and a second electrode tab is connected to the second electrode sheet. The second electrode sheet includes a second current collector, a second outer membrane arranged on a surface facing away from a center of the cell, and a second inner membrane arranged on a surface facing the center of the cell. Respective starting ends of the second outer membrane and the second inner membrane are located on the second current collector between the first end of the second electrode sheet and a second bend. The second inner membrane is provided with an inner uncoated region at least at the second bend.

    WOUND-TYPE CELL
    18.
    发明申请
    WOUND-TYPE CELL 审中-公开

    公开(公告)号：US20190067746A1

    公开(公告)日：2019-02-28

    申请号：US16177087

    申请日：2018-10-31

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Qiao ZENG ,  Jiacai CAI ,  Kefei WANG ,  Yu LUO

    IPC: H01M10/0587 ,  H01M10/04 ,  H01M2/26 ,  H01M10/0525

    Abstract: The present disclosure provides a wound-type cell which includes: a first electrode plate; a second electrode plate; a separator disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate; in which a third winding start end of the separator is positioned at an outer side of a second winding start end of the second electrode plate in a length direction; the third winding start end extends along a direction away from a second end of the second winding start end and the third winding start end is not folded back.

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS
    20.
    发明公开
    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS 审中-公开

    公开(公告)号：US20240356069A1

    公开(公告)日：2024-10-24

    申请号：US18758405

    申请日：2024-06-28

    Applicant: Ningde Amperex Technology Limited

    Inventor： Kefei WANG

    IPC: H01M10/0566 ,  H01M4/02 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525

    CPC classification number: H01M10/0566 ,  H01M4/364 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

    Abstract: An electrochemical apparatus including: a positive electrode, a negative electrode, and an electrolyte, where the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material, where the positive electrode active material includes lithium nickel cobalt manganate containing aluminum, zirconium, and tungsten. The electrolyte includes a dinitrile compound. The electrochemical apparatus according to this application has improved overcharge resistance and safety under high temperature and high pressure.

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