公开(公告)号：US20210231726A1

公开(公告)日：2021-07-29

申请号：US17051447

申请日：2020-01-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Baohai DU ,  Le CHU ,  Jiayu YU ,  Qiandeng LI

IPC: G01R31/14 ,  G01R31/389 ,  G01R31/396 ,  G01R31/36 ,  G01R31/3842 ,  G01R27/02 ,  H01M10/48 ,  H01M10/42

Abstract: A circuit includes: an isolation power module, a first sampling module, a first sampling point, a second sampling module, a second sampling point, a processor. A first terminal of the first sampling module is connected to a positive electrode of a battery pack and first terminal of a positive switch module, a second terminal of the first sampling module is connected to a negative electrode of the battery pack and a first terminal of the negative switch module, a third terminal of the first sampling module is connected to a first reference voltage end; a first terminal of the second sampling module is connected to a second terminal of the positive switch module and a positive electrode of the isolation power module, a second terminal of the second sampling module is connected to a second terminal of the negative switch module and a negative electrode of the isolation power module.