US 11,894,701 B2
Cell-balancing method and battery management system performing the same
Takao Hidaka, Yongin-si (KR); and Hwa-Su Kim, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Jun. 11, 2021, as Appl. No. 17/346,165.
Application 17/346,165 is a division of application No. 16/293,419, filed on Mar. 5, 2019, granted, now 11,101,668.
Claims priority of application No. 10-2018-0026458 (KR), filed on Mar. 6, 2018.
Prior Publication US 2021/0305817 A1, Sep. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0016 (2013.01) [H02J 7/0014 (2013.01); H02J 7/0048 (2020.01); H02J 7/0024 (2013.01); H02J 7/0025 (2020.01); H02J 7/007182 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A battery management system comprising:
a plurality of balancing resistors respectively forming balancing discharging paths of cells connected in series to each other;
a plurality of balancing switches respectively connected between the cells and the balancing resistors, and configured to control cell-balancing of each of the cells;
a voltage-detecting circuit for detecting respective cell voltages of the cells; and
a battery controller for acquiring respective balancing capacities of the cells based on the cell voltages, for obtaining duty cycles of the balancing switches according to the balancing capacities, and for scaling the duty cycles of the balancing switches according to a sum of duty cycles of two adjacent cells from among the cells.