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    ELECTROCHEMICAL DEVICE INCLUDING PROTECTIVE LAYER, AND ELECTRONIC DEVICE
    1.
    发明申请
    ELECTROCHEMICAL DEVICE INCLUDING PROTECTIVE LAYER, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20250023058A1

    公开(公告)日：2025-01-16

    申请号：US18901099

    申请日：2024-09-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Dongdong HAN ,  Qingwen ZHANG ,  Xiaoqian LIU

    IPC: H01M4/66 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/42

    Abstract: An electrochemical device, including a positive electrode, where the positive electrode includes a positive electrode current collector, a first protective layer, and a first positive electrode active material layer. The positive electrode current collector includes a first surface and a second surface opposite to each other, and the first protective layer is disposed between the first surface and the first positive electrode active material layer. The first surface includes a first region and a second region, where the first region is provided with the first positive electrode active material layer, and the second region is not provided with the first positive electrode active material layer. An area of the first region is A1 cm2, an area of the second region is A2 cm2, and an area of the first protective layer is A3 cm2, satisfying: 0.5≤A3/(A1+A2)≤1. The electrochemical device of this application has significantly improved safety performance.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    3.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240274801A1

    公开(公告)日：2024-08-15

    申请号：US18436115

    申请日：2024-02-08

    Applicant: Ningde Amperex Technology Limited

    Inventor： Bing JIANG ,  Tao LIU ,  Feng ZHOU ,  Qingwen ZHANG

    IPC: H01M4/36 ,  H01M4/02 ,  H01M4/139 ,  H01M10/0525 ,  H01M50/536

    CPC classification number: H01M4/366 ,  H01M4/139 ,  H01M10/0525 ,  H01M50/536 ,  H01M2004/021

    Abstract: An electrochemical device includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate. The first electrode plate includes a current collector, a tab, and an active layer. The tab is electrically connected to and extends out of the current collector. The active layer is disposed on a surface of the current collector. The active layer includes a first active layer and a second active layer. In a first direction, the first active layer is located on a side of the second active layer facing the tab, and is adjacent to or partially overlaps the second active layer. In a second direction, the first active layer and the second active layer extend in a strip shape. The cohesive force of the first active layer is greater than the cohesive force of the second active layer.

    ELECTROCHEMICAL DEVICE, BATTERY MODULE, AND ELECTRICAL DEVICE
    4.
    发明公开
    ELECTROCHEMICAL DEVICE, BATTERY MODULE, AND ELECTRICAL DEVICE 审中-公开

    公开(公告)号：US20240339734A1

    公开(公告)日：2024-10-10

    申请号：US18750296

    申请日：2024-06-21

    Applicant: Ningde Amperex Technology Limited

    Inventor： Sen ZHANG ,  ZhiFang DAI ,  Hai LONG ,  Qingwen ZHANG

    IPC: H01M50/538 ,  H01M10/04 ,  H01M10/0587

    CPC classification number: H01M50/538 ,  H01M10/0431 ,  H01M10/0587

    Abstract: An electrochemical device includes an electrode assembly. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. A plurality of first tabs are disposed on the first electrode plate. The separator is disposed between the first and second electrode plates. The first electrode plate, the separator, and the second electrode plate are stacked and wound. The first tabs are connected to a region of the first electrode plate other than first inner layers and first outer layers. The first inner layers include N layers along a direction from a start layer to an end layer of the first electrode plate. The first outer layers include M layers starting from the end layer of the first electrode plate along a direction from the end layer to the start layer of the first electrode plate, where M≥1, and N≥3.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    5.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20230395787A1

    公开(公告)日：2023-12-07

    申请号：US18454363

    申请日：2023-08-23

    Applicant: Ningde Amperex Technology Limited

    Inventor： Shengqi LIU ,  Xiaohu CAI ,  Kefei WANG ,  Qingwen ZHANG

    IPC: H01M4/36 ,  H01M10/0525

    CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M2004/028

    Abstract: An electrochemical device includes a positive electrode, the positive electrode includes a current collector and a film layer containing a positive active material. The film layer is disposed on at least one surface of the current collector. The positive active material includes a primary particle and/or a secondary particle. When a mass percent A of the primary particle in the positive active material based on a mass of the positive active material satisfies 20%≤A≤100%, the film layer, the positive active material, and the current collector satisfy: Dl≥Dv99−Dc; and, when a mass percent A′ of the primary particle in the positive active material based on the mass of the positive active material satisfies 0≤A′≤20%, the film layer, the positive active material, and the current collector satisfy: Dl≥1.1 Dv99.

    SEPARATOR, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE
    6.
    发明公开
    SEPARATOR, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240339731A1

    公开(公告)日：2024-10-10

    申请号：US18622071

    申请日：2024-03-29

    Applicant: Ningde Amperex Technology Limited

    Inventor： Mingchang ZHU ,  Dongyang GUO ,  Qingwen ZHANG ,  Minjing CHEN

    IPC: H01M50/491 ,  H01M50/417 ,  H01M50/44 ,  H01M50/454

    CPC classification number: H01M50/491 ,  H01M50/417 ,  H01M50/44 ,  H01M50/454

    Abstract: A separator includes a porous substrate and an inorganic coating layer disposed on at least one surface of the porous substrate. The porous substrate includes fibers. The fibers are made of a material including at least one of polyethylene or polypropylene. A diameter of the fibers is 0.01 μm to 0.70 μm. A diameter difference between any two fibers ranges from 0 μm to 0.40 μm. The inorganic coating layer includes a polymer and inorganic particles. The polymer includes at least one of styrene-butadiene rubber, a polyacrylate ester, or a polyolefin. The polymer can be modified by a functional group. The modifying functional group includes at least one of —OH, —COOH, or —NH. The above settings improve the infiltration effect of the electrolyte solution for the separator and the capability of the separator in retaining the electrolyte solution, thereby improving the cycle performance of the electrochemical device.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    9.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240234741A9

    公开(公告)日：2024-07-11

    申请号：US18539272

    申请日：2023-12-14

    Applicant: Ningde Amperex Technology Limited

    Inventor： Changchao DU ,  Kefei WANG ,  Feng ZHOU ,  Qingwen ZHANG

    IPC: H01M4/66 ,  H01M4/133 ,  H01M10/0525

    CPC classification number: H01M4/663 ,  H01M4/133 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/027

    Abstract: An electrochemical device includes a negative electrode sheet. The negative electrode sheet includes a current collector, a first coating layer, and a second coating layer. The first coating layer is located between the current collector and the second coating layer. The second coating layer includes a negative active material. The first coating layer includes a conductive carbon material. The conductive carbon material includes at least one of carbon nanotubes or graphene. Based on a mass of the first coating layer, a mass percent of the conductive carbon material is 20% to 60%. The main material of the first coating layer is at least one of carbon nanotubes or graphene.

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