公开(公告)号：US20250033530A1

公开(公告)日：2025-01-30

申请号：US18917096

申请日：2024-10-16

Applicant: BYD COMPANY LIMITED

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

IPC: B60L58/24 ,  B60L15/00 ,  B60L58/27 ,  H01M10/615 ,  H01M10/625 ,  H01M10/63 ,  H01M10/6571 ,  H01M50/51 ,  H05B6/10

Abstract: A power battery comprises a first battery cell group and a second battery cell group that are not equal in electromotive force and connected in series. The heating system comprises an inverter, an alternating-current motor, and a first controller. Midpoints of three bridge arms of the inverter are connected to head ends of three-phase coils of the motor in a one-to-one correspondence manner, and tail ends of the motor are connected together to form a neutral point. The neutral point is connected to a first connection point by means of a connection line, and the first connection point is a connection point between the first and second battery cell groups. The first controller is used for inputting a driving signal to the inverter. The first battery cell group, the second battery cell group, the inverter, the motor, and the connection line form an alternating-current self-heating loop.

公开(公告)号：US20240128537A1

公开(公告)日：2024-04-18

申请号：US18532313

申请日：2023-12-07

Applicant: BYD COMPANY LIMITED

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

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

CPC classification number: H01M10/63 ,  H01M10/615 ,  H01M10/625 ,  H01M10/659 ,  H02J7/0047 ,  H01M2220/20

Abstract: 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：US20240105962A1

公开(公告)日：2024-03-28

申请号：US18521727

申请日：2023-11-28

Applicant: BYD COMPANY LIMITED

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

IPC: H01M4/66 ,  H01M4/74 ,  H01M10/052 ,  H01M10/658

CPC classification number: H01M4/667 ,  H01M4/666 ,  H01M4/742 ,  H01M10/052 ,  H01M10/658 ,  H01M2004/027

Abstract: A 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 far 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.

公开(公告)号：US20230324956A1

公开(公告)日：2023-10-12

申请号：US18334871

申请日：2023-06-14

Applicant: BYD COMPANY LIMITED

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

IPC: G06F1/16

CPC classification number: G06F1/1635

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