US 12,294,064 B2
Rechargeable battery monitoring system, battery pack and electric vehicle
Yanhui Fu, Ningde (CN); Le Chu, Ningde (CN); Zhongliang Guo, Ningde (CN); and Qiandeng Li, 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 Dec. 15, 2020, as Appl. No. 17/123,017.
Application 17/123,017 is a continuation of application No. PCT/CN2020/072660, filed on Jan. 17, 2020.
Claims priority of application No. 201910083091.2 (CN), filed on Jan. 18, 2019.
Prior Publication US 2021/0104781 A1, Apr. 8, 2021
Int. Cl. H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H02J 7/00 (2006.01)
CPC H01M 10/4257 (2013.01) [H01M 10/482 (2013.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H02J 7/0013 (2013.01); H02J 7/0047 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01); H01M 2220/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rechargeable battery monitoring system, comprising:
a plurality of battery units and at least one manual service disconnect (MSD) switch, wherein the plurality of battery units are serially-connected and the MSD switch is connected between two adjacent ones of the plurality of battery units;
a battery management unit (BMU) and a plurality of battery cell monitoring circuits (CMCs), wherein a quantity of the plurality of CMCs is equal to a quantity of the plurality of battery units, each CMC being connected to a corresponding battery unit; and
multiple daisy chain buses, wherein the plurality of CMCs are divided into multiple CMC groups that meet preset conditions, and each CMC group is communicatively connected to the BMU through respective one and only one of the multiple daisy chain buses and has no connection relationship with other CMC groups, wherein:
the preset conditions are: the battery units corresponding to the CMCs in each CMC group are serially-connected to form a battery unit group corresponding to the CMC group, and the MSD switch is connected between two adjacent battery unit groups; and, wherein
two adjacent CMCs in each CMC group are isolated from each other by an isolation unit,
a transformer is disposed between each of the plurality of CMCs and the BMU to implement voltage isolation between adjacent CMSs.