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    POWER SUPPLY DEVICE
    11.
    发明公开
    POWER SUPPLY DEVICE 审中-公开

    公开(公告)号：EP4535602A1

    公开(公告)日：2025-04-09

    申请号：EP23814719.3

    申请日：2023-03-21

    Applicant: BYD Company Limited

    Inventor： ZHANG, Ke ,  WU, Rongfang ,  WANG, Xi ,  GUO, Zizhu ,  PAN, Yi

    IPC: H02J7/00

    Abstract: A power supply device, comprising a first battery cell and a second battery cell. It is defined that the ratio between first parameters of the two battery cells is greater than a first preset threshold and the ratio between second parameters of the two battery cells is greater than a second preset threshold, and the capacity of the first battery cell is greater than that of the second battery cell; the first battery cell and/or the second battery cell is controlled to discharge according to a preset rule, so that the first battery cell can discharge all the time, and the first battery cell and the second battery cell discharge together when the second battery cell needs to be introduced.

    SELF-HEATING CONTROL METHOD AND SELF-HEATING CONTROL SYSTEM OF CHARGING AND DISCHARGING BATTERY
    12.
    发明公开
    SELF-HEATING CONTROL METHOD AND SELF-HEATING CONTROL SYSTEM OF CHARGING AND DISCHARGING BATTERY 审中-实审

    公开(公告)号：EP4345988A1

    公开(公告)日：2024-04-03

    申请号：EP22868782.8

    申请日：2022-06-27

    Applicant: BYD Company Limited

    Inventor： ZHANG, Ke ,  CHEN, Na ,  LI, Jiannian ,  PAN, Yi ,  GUO, Zizhu

    IPC: H01M10/615

    Abstract: A self-heating control method and a self-heating control system for a rechargeable battery are disclosed. The rechargeable battery includes a battery cell. A separator is provided between a positive electrode and a negative electrode of the battery cell. A reference electrode is correspondingly provided at the separator. A surface electrode is correspondingly provided on the negative electrode surface of the battery cell. The method includes: detecting the potential difference between the reference electrode and the surface electrode, generating a charging current adjustment instruction according to the potential difference between the reference electrode and the surface electrode, and adjusting the charging current of the rechargeable battery according to the charging current adjustment instruction during the self-heating process of the rechargeable battery.

    CURRENT COLLECTOR AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE, AND ELECTROCHEMICAL ENERGY STORAGE DEVICE
    13.
    发明公开
    CURRENT COLLECTOR AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE, AND ELECTROCHEMICAL ENERGY STORAGE DEVICE 审中-公开

    公开(公告)号：EP4333128A1

    公开(公告)日：2024-03-06

    申请号：EP22815219.5

    申请日：2022-05-30

    Applicant: BYD Company Limited

    Inventor： PAN, Yi ,  XIE, Jing ,  GUO, Zizhu ,  SUN, Huajun

    IPC: H01M4/64 ,  H01M4/134

    Abstract: The present disclosure provides a current collector, a preparation method for a current collector, a negative electrode, and an electrochemical energy storage device. The current collector includes: a first polymer layer; a metal layer, the metal layer being disposed on a side of the first polymer layer; and a second polymer layer, the second polymer layer being disposed on a side of the metal layer facing away from the first polymer layer; and in a direction from the first polymer layer to the second polymer layer, the current collector having a number of through-holes that penetrate the current collector.

    HEATING SYSTEM FOR POWER BATTERY, AND ELECTRIC VEHICLE
    15.
    发明公开
    HEATING SYSTEM FOR POWER BATTERY, AND ELECTRIC VEHICLE 审中-公开

    公开(公告)号：EP4517934A1

    公开(公告)日：2025-03-05

    申请号：EP23795558.8

    申请日：2023-04-27

    Applicant: BYD Company Limited

    Inventor： ZHANG, Ke ,  GUO, Zizhu ,  PAN, Yi ,  ZHU, Yan ,  SUN, Huajun

    IPC: H01M10/615 ,  H01M10/625 ,  H01M10/637 ,  B60L58/27

    Abstract: The present disclosure provides a heating system for a power battery, and an electric vehicle. The power battery comprises a first cell group and a second cell group connected in series. The heating system comprises an inverter, an AC motor, a first controller, and a plurality of connection lines. The midpoints of three bridge arms of the inverter are connected to the head ends of three-phase coils of the AC motor in a one-to-one correspondence. The tail ends of the AC motor are connected together to form a neutral point. First ends of the connection lines are connected to the neutral point of the AC motor. Second ends of the connection lines are connected to a connection point between the first cell group and the second cell group. The first controller is configured to input a drive signal to the inverter. The first cell group, the second cell group, the inverter, the AC motor, and the connection lines form an AC self-heating loop.

    DRY PROCESS-BASED BATTERY POLE PIECE AND BATTERY
    16.
    发明公开
    DRY PROCESS-BASED BATTERY POLE PIECE AND BATTERY 审中-公开

    公开(公告)号：EP4333097A1

    公开(公告)日：2024-03-06

    申请号：EP22841451.2

    申请日：2022-07-14

    Applicant: BYD Company Limited

    Inventor： HU, Yiwei ,  GUO, Zizhu ,  PAN, Yi ,  ZHANG, Jianchang ,  SUN, Huajun

    IPC: H01M4/13

    Abstract: A dry battery electrode plate and a battery are provided. The dry battery electrode plate includes: a metal current collector and a self-supporting electrode film. The metal current collector is provided with pores. The self-supporting electrode film includes a first electrode film and a second electrode film. The first electrode film is arranged on one side of the metal current collector. The second electrode film is arranged on one side of the metal current collector facing away from the first electrode film. The first electrode film and the second electrode film are configured to be press-fit connected by an external force. The first electrode film and the second electrode film are attached to the metal current collector. The first electrode film and the second electrode film are connected to each other at positions corresponding to the pores.

    BATTERY PACK AND AUTOMOBILE
    17.
    发明公开
    BATTERY PACK AND AUTOMOBILE 审中-公开

    公开(公告)号：EP4331896A1

    公开(公告)日：2024-03-06

    申请号：EP22874360.5

    申请日：2022-07-06

    Applicant: BYD Company Limited

    Inventor： ZHANG, Ke ,  E, Congji ,  GUO, Zizhu ,  PAN, Yi ,  LU, Zhipei

    IPC: B60L50/60 ,  B60L58/10

    Abstract: A battery pack and a vehicle are provided. The battery pack is configured to provide electric energy required by the vehicle under different operating conditions. The battery pack includes a task manager, a first battery unit and a second battery unit. The first battery unit and the second battery unit respectively respond to a different operating state of a load and provide the electric energy required under the control of the task manager.

    ELECTRONIC DEVICE
    19.
    发明公开
    ELECTRONIC DEVICE 审中-公开

    公开(公告)号：EP4224605A1

    公开(公告)日：2023-08-09

    申请号：EP21909165.9

    申请日：2021-12-09

    Applicant: BYD Company Limited

    Inventor： WANG, Feng ,  HUANG, Liangliang ,  WANG, Jingguo ,  GUO, Zizhu ,  LEI, Yudong

    IPC: H01M50/244

    Abstract: An electronic device includes a housing (10), a functional assembly (20), and a battery (30). An accommodating space is formed in the housing. The functional assembly (20) includes a functional component (210), where the functional assembly (20) is mounted in the housing (10) and occupies a part of the accommodating space. The battery (30) includes a main body portion (310) and a protruding portion (320) and an avoidance portion (330) formed on the main body portion (310), the main body portion (310) and the protruding portion (320) occupy at least a part of the remaining space of the accommodating space, and the avoidance portion (330) is arranged corresponding to the functional component (210) and is configured to avoid the functional component (210).

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