US 11,658,364 B2
Battery module with improved safety, battery pack including the battery module and vehicle including the battery pack
Han-Young Lee, Daejeon (KR); Kyung-Min Lee, Daejeon (KR); Bum-Young Jung, Daejeon (KR); and Jeong-Ho Ha, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/49,914
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 7, 2019, PCT No. PCT/KR2019/015085
§ 371(c)(1), (2) Date Oct. 22, 2020,
PCT Pub. No. WO2020/116799, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 10-2018-0157556 (KR), filed on Dec. 7, 2018.
Prior Publication US 2021/0242548 A1, Aug. 5, 2021
Int. Cl. H01M 50/249 (2021.01); H01M 50/178 (2021.01); H01M 50/211 (2021.01); H01M 50/244 (2021.01); H01M 50/51 (2021.01); H01M 50/522 (2021.01); H01M 50/505 (2021.01); H01M 50/503 (2021.01); H01M 50/526 (2021.01); H01M 50/50 (2021.01); H01M 50/105 (2021.01); H01M 50/574 (2021.01)
CPC H01M 50/249 (2021.01) [H01M 50/105 (2021.01); H01M 50/178 (2021.01); H01M 50/211 (2021.01); H01M 50/244 (2021.01); H01M 50/50 (2021.01); H01M 50/503 (2021.01); H01M 50/505 (2021.01); H01M 50/51 (2021.01); H01M 50/522 (2021.01); H01M 50/526 (2021.01); H01M 50/574 (2021.01); H01M 2200/10 (2013.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery module comprising:
two or more battery cells, wherein the two or more battery cells are pouch type secondary batteries, each battery cell having an electrode assembly having ends respectively connected to a first end of an electrode lead of opposite polarities sealed in a pouch case together with an electrolyte and a second end of each electrode lead exposed to an outside of the pouch case,
wherein the electrode leads and a bus bar are connected to a first battery cell and a second battery cell of the two or more battery cells,
wherein the bus bar comprises a metal layer and a material layer that is conductive, but capable of acting as a resistor above a predetermined temperature,
wherein the material layer comprises a gas generating material that is decomposed at the predetermined temperature or higher to generate a gas and increase resistance, and
wherein the bus bar includes a block and a body, the block being connected to the electrode leads, the block embedded in a first surface of the body, a surface of the block being exposed to an outside coplanar with the first surface of the body, the material layer being interposed between the body and the block to separate the block from the body.