US 12,149,104 B2
Management method for a battery system having parallel battery packs
Rui Xiao, Frankfurt am Mai (DE); Ying Huang, Huzhou (CN); and Donglei Wu, Huzhou (CN)
Assigned to Microvast GmbH, Frankfurt am Main (DE); Microvast, Inc., Stafford, TX (US); and Microvast Power Systems Co., Ltd., Huzhou (CN)
Appl. No. 17/607,899
Filed by Microvast GmbH, Frankfurt am Main (DE); Microvast, Inc., Stafford, TX (US); and Microvast Power Systems Co., Ltd., Huzhou (CN)
PCT Filed Aug. 19, 2020, PCT No. PCT/CN2020/109962
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2022/036580, PCT Pub. Date Feb. 24, 2022.
Prior Publication US 2022/0376518 A1, Nov. 24, 2022
Int. Cl. H02J 7/00 (2006.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01)
CPC H02J 7/0019 (2013.01) [G01R 31/389 (2019.01); G01R 31/396 (2019.01); H02J 7/007186 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A management method for a battery system having parallel battery packs, comprising a charging control operation including sequentially connecting battery packs having a low voltage value level and completing a charging of the battery packs, the charging control operation comprising steps of:
C100, collecting voltage data and status data of each battery pack in real time, closing a switch of the battery pack having a low voltage value level, and maintaining a normal charging current;
C200, keeping a constant voltage and reducing the charging current, if a voltage of a connected battery pack reaches a lowest voltage value of an unconnected battery pack;
C300, connecting the unconnected battery pack that is located at the lowest voltage value, and increasing and returning to the normal charging current, if a current value of the system is lower than a preset value Y;
C400, repeating steps C200 to C300 until all battery packs are fully charged;
in step C300, a method for determining the preset value Y comprising determining the preset value Y accordingly to a selection of a contactor, namely closing the contactor under an impulse current no greater than the preset value Y, to still guarantee a life span more than 10,000 times for the contactor.