US 12,352,822 B2
Cell sampling circuit, circuit fault early warning method, and battery management system
Yihua Cai, Ningde (CN); and Feidan Gao, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Sep. 8, 2022, as Appl. No. 17/940,354.
Application 17/940,354 is a continuation of application No. PCT/CN2022/089552, filed on Apr. 27, 2022.
Claims priority of application No. 202210018432.X (CN), filed on Jan. 7, 2022.
Prior Publication US 2023/0221378 A1, Jul. 13, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/3842 (2019.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/3842 (2019.01); H01M 10/425 (2013.01); H01M 10/482 (2013.01); H02J 7/0047 (2013.01); H01M 2010/4271 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cell sampling circuit, comprising:
a plurality of target units sequentially connected in a series connection in a daisy-chain communication manner, one of the plurality of target units arranged at a first place in the series connection being a main control unit, and the other of the plurality of target units being cell sampling units; and
one or more transformer units each connected between two successive target units of the plurality of target units;
wherein each of the target units is configured to:
acquire an impedance of at least one transformer unit connected to the target unit; and
judge, based on the acquired impedance, whether to perform circuit abnormality early warning.