公开(公告)号：US20210027961A1

公开(公告)日：2021-01-28

申请号：US16981260

申请日：2019-11-15

申请人： Contemporary Amperex Technology Co., Limited

发明人： Zhimin DAN ,  Delong SHI ,  Yizhen HOU ,  Wei ZHANG ,  Liansong WANG

IPC分类号： H01H47/32 ,  B60L3/00 ,  B60L50/60 ,  H01H47/18 ,  H01H47/00

摘要： The embodiments of the present disclosure disclose a relay holding circuit and a battery management system. the relay holding circuit may include: a high-voltage isolated power source, a power source driving module, and a microprocessor of a battery management system; the high-voltage isolated power source may be respectively connected to two electrodes of a battery pack, an output terminal of the power source driving module, the microprocessor, and a first terminal of a first switching device; an input terminal of the power source driving module may be connected to the microprocessor; the microprocessor may be further connected to a primary battery, the microprocessor may output a low-level signal to the power source driving module when the primary battery supplies power abnormally.