US 12,334,599 B2
Battery module and energy storage device
Chang Bog Lee, Daejeon (KR); Sung Won Kim, Daejeon (KR); Jae Chan Lee, Daejeon (KR); and Hyeon Jin Song, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/776,677
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 2, 2021, PCT No. PCT/KR2021/004101
§ 371(c)(1), (2) Date May 13, 2022,
PCT Pub. No. WO2021/206373, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 10-2020-0044257 (KR), filed on Apr. 10, 2020.
Prior Publication US 2022/0399619 A1, Dec. 15, 2022
Int. Cl. H01M 50/583 (2021.01); H01H 37/76 (2006.01); H01M 50/204 (2021.01)
CPC H01M 50/583 (2021.01) [H01H 37/76 (2013.01); H01M 50/204 (2021.01); H01M 2200/103 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An energy storage device comprising:
a battery rack including a plurality of battery modules; and
a rack fuse connected in series to the plurality of battery modules and configured to cut off a battery rack circuit when an overcurrent occurs in the battery rack,
wherein each of the plurality of battery modules comprises a battery cell and a module fuse that cuts off a battery module circuit when an overcurrent occurs in the battery module,
wherein the module fuse has a voltage specification capable of corresponding to an output voltage of the battery rack, and has a short circuit specification lower than a short circuit specification of the rack fuse, and
wherein the rack fuse is cut off to withstand a first voltage that corresponds to a system voltage when a node between the rack fuse and a positive output terminal is shorted to ground.