公开(公告)号：US20250042307A1

公开(公告)日：2025-02-06

申请号：US18920519

申请日：2024-10-18

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Lei YAN ,  Wen GAO ,  Jinyue XIE ,  Ke ZHU

IPC: B60L58/27 ,  B60L15/00 ,  B60L58/18 ,  H01M10/44 ,  H01M10/615 ,  H01M10/625 ,  H01M10/637 ,  H01M10/657 ,  H02P27/06

Abstract: A battery self-heating control method includes: in a first period of each of control periods, configuring a conduction state of an upper bridge arm assembly and a conduction state of a lower bridge arm assembly to be a self-heating state, and in the self-heating state, alternately charging and discharging a first battery pack and/or a second battery pack to heat the battery pack by a current on a second connecting wire between a motor and the battery pack.

公开(公告)号：US20250046904A1

公开(公告)日：2025-02-06

申请号：US18924851

申请日：2024-10-23

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Lei YAN ,  Wen GAO ,  Jinyue XIE

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

Abstract: A battery heating system includes: a power battery pack including a first battery assembly and a second battery assembly connected to each other at a connection point, buck-boost inverters connected in parallel to form a first bus terminal and a second bus terminal, and a controller connected to a control terminal of the inverter bridge and configured to control self-heating of the first battery assembly and the second battery assembly. A center line is led out at the connection point. Each buck-boost inverters includes an inverter bridge and an inductor. The first bus terminal is connected to a positive electrode of the power battery pack. The second bus terminal is connected to a negative electrode of the power battery pack. A first terminal of the inductor is connected to a midpoint of the inverter bridge. A second terminal of the inductor is connected to the center line.