US 12,424,856 B2
Cell balancing apparatus, battery apparatus including the same, and cell balancing method
Chang Hyun Sung, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/421,575
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 20, 2020, PCT No. PCT/KR2020/014327
§ 371(c)(1), (2) Date Jul. 8, 2021,
PCT Pub. No. WO2021/101083, PCT Pub. Date May 27, 2021.
Claims priority of application No. 10-2019-0147975 (KR), filed on Nov. 18, 2019.
Prior Publication US 2022/0085623 A1, Mar. 17, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01)
CPC H02J 7/0019 (2013.01) [H01M 10/441 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A cell balancing apparatus of a battery module comprising a first outermost battery cell, a plurality of inner battery cells, and a second outermost battery cell connected in series, the cell balancing apparatus comprising:
a first inductor having a first terminal connected to a negative electrode of the first outermost battery cell;
a second inductor having a first terminal connected to a positive electrode of the second outermost battery cell;
a first transistor connected between a second terminal of the first inductor and a second terminal of the second inductor;
a first active element connected between a positive electrode of the first outermost battery cell and the second terminal of the first inductor; and
a second active element connected between a negative electrode of the second outermost battery cell and the second terminal of the second inductor,
wherein the plurality of inner battery cells comprise at least a first inner battery cell and a second inner battery cell directly connected to each other,
wherein the first terminal of the first inductor is connected to a positive terminal of the first inner battery cell, and
wherein the first terminal of the second inductor is connected to a negative terminal of the second inner battery cell.