US 11,942,775 B2
High voltage battery cluster, and overcurrent protection circuit and switch box thereof
Jianjie Zhou, Hefei (CN); Renxian Cao, Hefei (CN); Yilei Gu, Hefei (CN); Shanming Yang, Hefei (CN); Hui Tong, Hefei (CN); Xiaohu Xu, Hefei (CN); and Jinsheng Li, Hefei (CN)
Assigned to SUNGROW POWER SUPPLY CO., LTD., Anhui (CN)
Appl. No. 17/040,501
Filed by SUNGROW POWER SUPPLY CO., LTD., Anhui (CN)
PCT Filed Dec. 26, 2019, PCT No. PCT/CN2019/128525
§ 371(c)(1), (2) Date Sep. 22, 2020,
PCT Pub. No. WO2021/004027, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 201910609878.8 (CN), filed on Jul. 8, 2019.
Prior Publication US 2023/0107559 A1, Apr. 6, 2023
Int. Cl. H02H 3/087 (2006.01); B60L 3/00 (2019.01); H02J 7/00 (2006.01)
CPC H02H 3/087 (2013.01) [B60L 3/0069 (2013.01); H02J 7/00304 (2020.01); H02J 7/0031 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An overcurrent protection circuit of a high voltage battery cluster, comprising:
a first fusing module arranged in a positive branch of a switch box of the high voltage battery cluster; and
a second fusing module arranged in a negative branch of the switch box of the high voltage battery cluster, wherein
a withstand current-time curve of the first fusing module is different from a withstand current-time curve of the second fusing module,
wherein under a same withstanding current, fusing duration of the first fusing module is less than fusing duration of a first direct current switch, and fusing duration of the second fusing module is less than fusing duration of a second direct current switch in the switch box of the high voltage battery cluster.