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    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE CONTAINING SAME
    12.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE CONTAINING SAME 审中-公开

    公开(公告)号：US20230395859A1

    公开(公告)日：2023-12-07

    申请号：US18452049

    申请日：2023-08-18

    Applicant: Ningde Amperex Technology Limited

    Inventor： Hui CUI ,  Wenqiang LI ,  Chao TANG

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/42

    CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/525 ,  H01M10/4235 ,  H01M2004/028

    Abstract: An electrochemical device includes a positive electrode and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a positive active material. The positive active material contains an Mg element. Based on a total weight of the positive active material, a weight of the Mg element is X ppm, and 300≤X≤30000. The electrolytic solution contains carboxylate. Based on a total weight of the electrolytic solution, a weight percent of the carboxylate is Y %, and Y≤60. The electrochemical device satisfies 5≤X/Y≤6000. The electrochemical device effectively improve the high-temperature cycle performance and low-temperature discharge performance of the electrochemical device by controlling a relationship between the electrolytic solution and the positive active material.

    ELECTROLYTE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE
    13.
    发明申请
    ELECTROLYTE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20220223914A1

    公开(公告)日：2022-07-14

    申请号：US17708617

    申请日：2022-03-30

    Applicant: Ningde Amperex Technology Limited

    Inventor： Xiexue PENG ,  Jianming ZHENG ,  Chao TANG

    IPC: H01M10/0567

    Abstract: An electrolyte includes a compound represented by formula I-A, where A1, A2, and A3 are each independently selected from formula I-B or formula I-C, and at least two of A1, A2, and A3 are formula I-C. In formula I-A, n is selected from integers 1 to 10, and m is selected from 0 or 1. In formula I-B and formula I-C, represents a site at which two adjacent atoms are joined. The electrolyte can significantly improve high-temperature storage performance, cycle performance, and floating charge performance of the electrochemical device.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    14.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240332621A1

    公开(公告)日：2024-10-03

    申请号：US18622165

    申请日：2024-03-29

    Applicant: Ningde Amperex Technology Limited

    Inventor： Hui CUI ,  Shikang LUO ,  Junqiang HAN ,  Chao TANG

    IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525

    CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/525 ,  H01M2004/021 ,  H01M2004/028

    Abstract: An electrochemical device includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive active material layer. The positive active material layer includes a positive active material and a positive electrode additive. The positive electrode additive includes at least one of lithium titanium aluminum phosphate, lithium lanthanum titanium oxide, lithium lanthanum tantalum oxide, lithium aluminum germanium phosphate, lithium lanthanum zirconium oxide, niobium-doped lithium lanthanum zirconium oxide, or tantalum-doped lithium lanthanum zirconium oxide. The electrolyte includes a compound represented by Formula (I). Based on a mass of the positive active material layer, a mass percent of the positive electrode additive is p %, satisfying: 0.1≤p≤1.2. Based on a mass of the electrolyte, a mass percent of the compound represented by Formula (I) is q %, satisfying: 0.1≤q≤12.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
    16.
    发明公开
    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240243361A1

    公开(公告)日：2024-07-18

    申请号：US18622184

    申请日：2024-03-29

    Applicant: Ningde Amperex Technology Limited

    Inventor： Wenwen LI ,  Chao TANG

    IPC: H01M10/0567 ,  H01M10/0525

    CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M2300/004

    Abstract: An electrochemical device and an electronic device. The electrochemical device includes a positive electrode plate, a negative electrode plate, an electrolyte solution, and a separator. A mass percent A of the electrolyte solution in a total mass of a battery cell is 2% to 8%. The electrolyte solution includes a sulfur-containing substance with a valence of S4+/S6+ or above. Based on a total mass of the electrolyte solution, a mass percent B of the sulfur-containing substance is 10% to 20%. By controlling the mass percent of the electrolyte solution and the use of the sulfur-containing substance and the fluorine-containing additive, the ionic conductivity of the SEI film is improved, and consumption of the electrolyte solution during cycling is reduced, thereby enhancing safety performance and cycle performance while reducing the electrolyte volume.

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS
    18.
    发明申请
    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS 有权

    公开(公告)号：US20230070028A1

    公开(公告)日：2023-03-09

    申请号：US17900219

    申请日：2022-08-31

    Applicant: Ningde Amperex Technology Limited

    Inventor： Chunrui XU ,  Xi HU ,  Chao TANG

    IPC: H01M10/0566 ,  H01M10/0525

    Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The negative electrode plate includes a negative electrode active material layer, and the negative electrode active material layer includes a negative electrode active material, where mass of the negative electrode active material is a g. The electrolyte includes ethylene carbonate, where based on a mass of the electrolyte, a mass percentage of the ethylene carbonate is b%, and 1.6≤b/a≤6.4. A ratio of the mass percentage of the ethylene carbonate in the electrolyte to the mass of the negative electrode active material is controlled, so that cycling performance, a thickness swelling rate after high-temperature storage, a capacity retention rate after storage, and safety performance of the electrochemical apparatus can be improved.

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