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    Electrode sheet, battery cell and battery
    2.
    发明授权
    Electrode sheet, battery cell and battery 有权

    公开(公告)号：US12166213B2

    公开(公告)日：2024-12-10

    申请号：US16365449

    申请日：2019-03-26

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Qiang Zheng ,  Qi Dang ,  Zhanzhao Fang ,  Qiang Tao

    IPC: H01M4/66 ,  H01M10/0587 ,  H01M50/449 ,  H01M50/534 ,  H01M50/536

    Abstract: The present application relates to an electrode sheet, a battery cell and a battery. The electrode sheet includes a current collector and a protective layer. The current collector includes a coated region provided with an active material layer and an uncoated region without being provided with the active material layer. The protective layer is provided on at least a part of a surface of the uncoated region, and has a porosity of 0% to 95%. For the electrode sheet according to the present application, by providing the current collector with the protective layer, the contact resistance may be increased when the electrode sheet is short-circuited, and the discharge power and the thermal runaway probability of the battery cell may be reduced when the battery cell is internally short-circuited, thereby improving the safety performance of the battery cell.

    METHOD FOR ENHANCING BATTERY CYCLE PERFORMANCE AND ELECTRONIC DEVICE
    3.
    发明申请
    METHOD FOR ENHANCING BATTERY CYCLE PERFORMANCE AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20230042859A1

    公开(公告)日：2023-02-09

    申请号：US17957002

    申请日：2022-09-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Jun He ,  Hui Cui ,  Qiang Zheng ,  Zhanzhao Fang

    IPC: H01M10/44 ,  H01M10/42 ,  H01M50/491 ,  H02J7/00

    Abstract: A method for enhancing battery cycle performance. The method is applied in a battery and includes: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage, and the second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an organic solvent. The organic solvent includes a chain carboxylate compound. A weight percent of the chain carboxylate compound in the organic solvent is 10% to 70%. This application further provides an electronic device. The method can enhance high-temperature cycle and storage performance of the battery.

    METHOD FOR ENHANCING BATTERY CYCLE PERFORMANCE AND ELECTRONIC DEVICE
    6.
    发明申请
    METHOD FOR ENHANCING BATTERY CYCLE PERFORMANCE AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20230117982A1

    公开(公告)日：2023-04-20

    申请号：US17795927

    申请日：2020-03-26

    Applicant: Ningde Amperex Technology Limited

    Inventor： Zhanzhao Fang ,  Hui Cui ,  Hanxiang Zhang

    IPC: H01M10/0567 ,  H02J7/00 ,  H01M10/44

    Abstract: A method for enhancing battery cycle performance is applied in a battery and includes the following steps: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage. The second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an additive. The additive includes a nitrile compound. A mass percent of the nitrile compound in the electrolytic solution is 0.5% to 5%. This application further provides an electronic device. The method and electronic device according to this application can enhance high-temperature cycle performance of the battery, reduce a high-temperature storage expansion rate, and enhance hot-oven safety performance.

    Electrochemical device
    7.
    发明授权
    Electrochemical device 有权

    公开(公告)号：US11444333B2

    公开(公告)日：2022-09-13

    申请号：US16423389

    申请日：2019-05-28

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Qiang Zheng ,  Zhanzhao Fang ,  Qi Dang

    IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/66 ,  H01M4/70

    Abstract: The present application relates to an electrochemical device. Specifically, the present application provides an electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the first current collector includes a first surface and a second surface disposed oppositely; the first surface faces the shell, and includes a coated region coated with a first active material and an uncoated region; the uncoated region includes a first uncoated region disposed at an end of the jelly roll, and the first uncoated region includes alternating bent portions and straight portions; and the bent portions are provided with an insulating layer.

    Electrochemical device
    8.
    发明授权
    Electrochemical device 有权

    公开(公告)号：US11978862B2

    公开(公告)日：2024-05-07

    申请号：US17874615

    申请日：2022-07-27

    Applicant: Ningde Amperex Technology Limited

    Inventor： Qiang Zheng ,  Zhanzhao Fang ,  Qi Dang

    IPC: H01M10/0587 ,  H01M4/36 ,  H01M4/66 ,  H01M4/70 ,  H01M10/0525

    CPC classification number: H01M10/0587 ,  H01M4/366 ,  H01M4/667 ,  H01M4/70 ,  H01M10/0525

    Abstract: An electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the first current collector includes a first surface and a second surface disposed oppositely; the first surface faces the shell, and includes a coated region coated with a first active material and an uncoated region; the uncoated region includes a first uncoated region disposed at an end of the jelly roll, and the first uncoated region includes alternating bent portions and straight portions; and the bent portions are provided with an insulating layer.

    Electrochemical device
    10.
    发明授权
    Electrochemical device 有权

    公开(公告)号：US11695160B2

    公开(公告)日：2023-07-04

    申请号：US16254865

    申请日：2019-01-23

    Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

    Inventor： Qiang Tao ,  Chao Gao ,  Qiang Zheng ,  Zhanzhao Fang

    IPC: H01M10/05 ,  H01M4/04 ,  H01M4/13 ,  H01M10/0587 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

    CPC classification number: H01M10/0587 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

    Abstract: The present application relates to an electrochemical device. Specifically, the present application provides a cell, wherein the cell is formed by winding or stacking a first electrode and a second electrode which are arranged at an interval, and a separator is disposed between the first electrode and the second electrode. Wherein the first electrode includes a first current collector, and the first current collector includes a coated region coated with a first active material and an uncoated region without the first active material; the uncoated region is at least partially provided with an insulating layer. The adhesion between the insulating layer and the first current collector is not less than about 0.5 N/m. The electrochemical device provided by the present application has improved safety performance.

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