公开(公告)号：US20240128537A1

公开(公告)日：2024-04-18

申请号：US18532313

申请日：2023-12-07

申请人： BYD COMPANY LIMITED

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

IPC分类号： H01M10/63 ,  H01M10/615 ,  H01M10/625 ,  H01M10/659 ,  H02J7/00

CPC分类号： H01M10/63 ,  H01M10/615 ,  H01M10/625 ,  H01M10/659 ,  H02J7/0047 ,  H01M2220/20

摘要： A self-heating control method and a self-heating control system for a rechargeable battery are disclosed. The rechargeable battery includes a battery core. A separator is provided between a positive electrode and a negative electrode of the battery core. A reference electrode is correspondingly provided at the separator. A surface electrode is correspondingly provided on the negative electrode surface of the battery core. 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.

公开(公告)号：US20240351477A1

公开(公告)日：2024-10-24

申请号：US18759652

申请日：2024-06-28

申请人： BYD COMPANY LIMITED

发明人： Ke ZHANG ,  Jiannian LI ,  Rongfang WU ,  Zizhu GUO ,  Yi PAN

IPC分类号： B60L58/27 ,  B60L15/02 ,  B60L58/18 ,  H02J7/00

CPC分类号： B60L58/27 ,  B60L15/02 ,  B60L58/18 ,  H02J7/0013

摘要： A heating circuit of a power battery is provided. The power battery includes a first battery core group and a second battery core group connected in series. The heating circuit includes an inverter, an alternating current motor, and a first controller. A neutral point of the alternating current motor is connected to a first connection point between the first battery core group and the second battery core group. The first controller is configured to input a driving signal to control the inverter to alternately connect the first battery core group to the alternating current motor and the second battery core group to the alternating current motor, to cause the first battery core group and the second battery core group to charge each other.