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    BATTERY STATE ESTIMATION METHOD, APPARATUS, DEVICE, BATTERY SYSTEM AND STORAGE MEDIUM
    1.
    发明申请
    BATTERY STATE ESTIMATION METHOD, APPARATUS, DEVICE, BATTERY SYSTEM AND STORAGE MEDIUM 有权

    公开(公告)号：US20220120820A1

    公开(公告)日：2022-04-21

    申请号：US17565460

    申请日：2021-12-30

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Jian RUAN ,  Mingshu DU ,  Shichao LI ,  Shenzhi TANG ,  Yanhua LU

    IPC: G01R31/3842 ,  G01R31/396 ,  G01R31/392

    Abstract: The present application provides a battery state estimation method, which relates to the field of battery technology. The battery state estimation method includes: obtaining a first cell state parameter of each of a plurality of cells in a battery; under a condition that there are multiple cell partitions, determining whether the first cell state parameter of each cell belonging to a cell partition is within a first cell state parameter range corresponding to the cell partition; when it is within the first cell state parameter range corresponding to the cell partition, estimating a cell state of each of the cell partitions based on a target cell state parameter corresponding to the cell partition; and estimating a battery state of the battery based on the cell state.

    METHOD, DEVICE, SYSTEM FOR ESTIMATING REMAINING CHARGING TIME AND STORAGE MEDIUM
    2.
    发明申请
    METHOD, DEVICE, SYSTEM FOR ESTIMATING REMAINING CHARGING TIME AND STORAGE MEDIUM 有权

    公开(公告)号：US20210325466A1

    公开(公告)日：2021-10-21

    申请号：US17043703

    申请日：2019-11-29

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Jian RUAN ,  Shichao LI ,  Yanhua LU ,  Yizhen HOU ,  Wei ZHANG

    IPC: G01R31/367 ,  G01R31/374 ,  H02J7/00

    Abstract: A method includes: estimating a first estimated time required for the battery to be charged from the state of charge estimation initial value to an upper limit of the state of charge estimation section; estimating a second estimated time required for the battery to be changed in temperature from the temperature estimation initial value to an upper limit of the temperature estimation section; determining a new state of charge estimation initial value, a new state of charge estimation section, and a new temperature estimation initial value and a new temperature estimation section based on a smaller estimated time between the first estimated time and the second estimated time, until an upper limit of an state of charge estimation section reaches a target state of charge and a smaller estimated time is a first estimated time; and accumulating every determined smaller estimated times to obtain an estimated remaining charging time.

    BATTERY MONITORING METHOD AND BATTERY MONITORING DEVICE
    5.
    发明公开
    BATTERY MONITORING METHOD AND BATTERY MONITORING DEVICE 审中-公开

    公开(公告)号：US20240295609A1

    公开(公告)日：2024-09-05

    申请号：US18645624

    申请日：2024-04-25

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Shan HUANG ,  Shichao LI ,  Xiyang ZUO

    IPC: G01R31/382 ,  G01R31/367 ,  G01R31/396

    CPC classification number: G01R31/382 ,  G01R31/367 ,  G01R31/396

    Abstract: A battery monitoring method and a battery monitoring device are provided in the embodiments of the present disclosure. The battery monitoring method includes: obtaining a first difference value between a state of charge (SOC) of each of a plurality of cells and an average SOC of the plurality of cells according to first time information; obtaining a second difference value between the SOC of each of the plurality of cells and the average SOC of the plurality of cells according to second time information; determining self-discharge rates of the plurality of cells according to the first difference value and the second difference value; and sending a prompt message when the self-discharge rates meet a preset condition. According to the battery monitoring method provided in the embodiments of the present disclosure, the self-discharge rate of the battery can be monitored, and the safety of usage of the battery is improved.

    METHOD FOR UPDATING OCV-SOC CURVE OF BATTERY PACK, BATTERY MANAGEMENT SYSTEM, AND VEHICLE
    7.
    发明申请
    METHOD FOR UPDATING OCV-SOC CURVE OF BATTERY PACK, BATTERY MANAGEMENT SYSTEM, AND VEHICLE 有权

    公开(公告)号：US20220281350A1

    公开(公告)日：2022-09-08

    申请号：US17750602

    申请日：2022-05-23

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Shenzhi TANG ,  Mingshu DU ,  Shichao LI ,  Jian RUAN

    IPC: B60L58/12 ,  B60L58/16 ,  G01R31/374 ,  G01R31/392 ,  G01R31/382 ,  H01M10/42

    Abstract: This application relates to the field of battery technologies, and discloses a method for updating an OCV-SOC curve of a battery pack, a battery management system, and a vehicle. The method for updating an OCV-SOC curve of a battery pack includes: obtaining information that represents an aging state of the battery pack; obtaining a current aging characteristic parameter of the battery pack based on a current OCV-SOC curve of the battery pack and the information; and updating the OCV-SOC curve of the battery pack based on the current aging characteristic parameter and the current OCV-SOC curve of the battery pack. In this application, the OCV-SOC curve of the battery pack is updated based on the aging state of the battery pack, thereby obtaining an OCV-SOC curve that meets the aging state of the battery pack and making it convenient to estimate the online state of the battery pack more accurately.

    CHARGING CONTROL METHOD AND DEVICE, AND POWER MANAGEMENT CONTROLLER
    8.
    发明申请
    CHARGING CONTROL METHOD AND DEVICE, AND POWER MANAGEMENT CONTROLLER 有权

    公开(公告)号：US20220268845A1

    公开(公告)日：2022-08-25

    申请号：US17563857

    申请日：2021-12-28

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Guangyu XU ,  Shichao LI ,  Wei ZHAO

    IPC: G01R31/388 ,  H01M10/44 ,  G01R31/36

    Abstract: An embodiment of this application provides a charging control method and device and a power management controller. The charging control method includes: determining whether battery status of a battery pack meets preset conditions, where the battery pack includes a plurality of battery cells, and the preset conditions are: the battery pack has been left standing for a preset duration, and an open-circuit voltage of each battery cell in the battery pack falls within a preset range; and charging the battery pack based on a charging policy corresponding to a determining result, so that a capacity of a battery cell with a highest remaining capacity in the battery pack reaches a nominal capacity of the battery cell with the highest remaining capacity.

    METHOD FOR CHARGING POWER BATTERY AND BATTERY MANAGEMENT SYSTEM
    10.
    发明公开
    METHOD FOR CHARGING POWER BATTERY AND BATTERY MANAGEMENT SYSTEM 审中-公开

    公开(公告)号：US20230327464A1

    公开(公告)日：2023-10-12

    申请号：US18209491

    申请日：2023-06-14

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Shan HUANG ,  Guangyu XU ,  Haili LI ,  Shichao LI

    IPC: H02J7/00

    CPC classification number: H02J7/0029 ,  H02J7/0048 ,  H02J7/005 ,  H02J7/007194

    Abstract: Embodiments of the present application provide a method for charging a power battery and a battery management system. The method may be applied to a battery management system for the power battery, and the method may comprise acquiring a charging mode of the power battery; determining a negative electrode potential safety threshold for the power battery according to the charging mode of the power battery; acquiring a negative electrode potential of the power battery during a charging process for the power battery; and adjusting a charging current for the power battery based on the negative electrode potential of the power battery and the negative electrode potential safety threshold.

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