公开(公告)号：US20230294557A1

公开(公告)日：2023-09-21

申请号：US18018252

申请日：2021-07-26

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Yong XIONG ,  Gan SONG ,  Yili LUO

IPC: B60L58/26 ,  B60L58/27

CPC classification number: B60L58/26 ,  B60L58/27

Abstract: A vehicle battery thermal management system includes a heat conducting element connected to a vehicle air conditioning system and a self-heating circuit connected to a vehicle power battery. The heat conducting element, a compressor of the vehicle air conditioning system, and an outdoor condenser of the vehicle air conditioning system form a battery refrigeration loop, and the battery refrigeration loop absorbs heat from the vehicle power battery through a refrigerant in the heat conducting element to cool down the vehicle power battery. The self-heating circuit and the vehicle power battery form a battery self-heating loop, and the self-heating circuit is configured to control the vehicle power battery to perform high-frequency alternating charging and discharging for self-heating in the battery self-heating loop.