公开(公告)号：US20220113344A1

公开(公告)日：2022-04-14

申请号：US17557285

申请日：2021-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng LI ,  Changjian LIU ,  Fuming YE ,  Fangjie ZHOU ,  Liansong WANG ,  Lidan YAN

IPC: G01R31/14 ,  B60L58/10 ,  G01R27/02 ,  G01R31/382 ,  G01R31/36 ,  H01M10/42

Abstract: Embodiments of this application relate to the monitoring field, and disclose a method for monitoring an insulation monitoring circuit and a battery management system. In some embodiments of this application, the method for monitoring an insulation monitoring circuit includes: in a state in which a first switch and a second switch are closed and a third switch is open, obtaining a first electrical signal detected by a second monitoring module; and based on the first electrical signal and a voltage reference value between a positive electrode of a battery pack and a negative electrode of the battery pack, determining whether an insulation monitoring circuit is faulty; or obtaining a second electrical signal detected by a first monitoring module and a third electrical signal detected by a third monitoring module, and based on the second electrical signal and the third electrical signal, determining whether the insulation monitoring circuit is faulty.