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    CHARGING METHOD, ELECTRONIC APPARATUS, AND STORAGE MEDIUM
    6.
    发明公开
    CHARGING METHOD, ELECTRONIC APPARATUS, AND STORAGE MEDIUM 审中-公开

    公开(公告)号：US20230231405A1

    公开(公告)日：2023-07-20

    申请号：US18192228

    申请日：2023-03-29

    Applicant: Ningde Amperex Technology Limited

    Inventor： Ting GUAN ,  Shan ZHU ,  Fei WU

    IPC: H02J7/00 ,  H01M10/44

    CPC classification number: H02J7/007182 ,  H02J7/0013 ,  H02J7/0047 ,  H01M10/441

    Abstract: A charging method for battery includes: in an n-th charging process, charging a first battery to a charge cut-off voltage Un in a first charging manner; after the n-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVn of the first battery at a standing time of ti; in an m-th charging process, charging the first battery to the charge cut-off voltage Un in the first charging manner; after the m-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVm of the first battery at the standing time of ti; and under the condition of OCVn>OCVm, in an (m+1)-th charging process and subsequent charging processes, charging the first battery to the charge cut-off voltage Un in the first charging manner and then continuing to charge the first battery to a first voltage Um+1 in a second charging manner.

    ELECTROLYTE AND ELECTROCHEMICAL DEVICE
    7.
    发明申请
    ELECTROLYTE AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20220407109A1

    公开(公告)日：2022-12-22

    申请号：US17885920

    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 electrochemical device, including an electrode and an electrolyte. The 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 11 wt %, about 0.1≤(X/Y)≤about 8. The electrode including a coating, which including a single-sided sub-coating and a double-sided coating, the electrode with the single-sided sub-coating has an electrode compaction density D1, and the electrode with the double-sided coating has an electrode compaction density D2, where about 0.8≤D1/D2≤about 1.2. The electrolyte and D1/D2 of the electrodes has a significant effect on the cycle performance of the electrochemical device.

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