US 11,658,367 B2
Battery pack
Jae Uk Ryu, Daejeon (KR); Dal Mo Kang, Daejeon (KR); Jeong Oh Moon, Daejeon (KR); Jae Min Yoo, Daejeon (KR); and Min Ho Kwon, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/650,673
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Dec. 27, 2018, PCT No. PCT/KR2018/016735
§ 371(c)(1), (2) Date Mar. 25, 2020,
PCT Pub. No. WO2019/190028, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 10-2018-0034680 (KR), filed on Mar. 26, 2018.
Prior Publication US 2021/0043907 A1, Feb. 11, 2021
Int. Cl. H01M 50/502 (2021.01); H01M 50/50 (2021.01); H01M 50/204 (2021.01); H01M 50/583 (2021.01)
CPC H01M 50/502 (2021.01) [H01M 50/204 (2021.01); H01M 50/50 (2021.01); H01M 50/583 (2021.01); H01M 2220/20 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A battery pack comprising:
a battery cell; and
a bus bar electrically connected to the battery cell, wherein
the bus bar comprises a rupture portion configured to melt due to electric resistance heat generated by overcurrent and thus to rupture, the rupture portion having a plurality of through-holes therein,
wherein the plurality of through-holes are arranged along a plurality of imaginary connection lines including a first imaginary connection line and a second imaginary connection line that are spaced apart from each other, each of the first and second imaginary connection lines forming a predetermined angle with respect to a longitudinal direction of the bus bar,
wherein in each of the first and second imaginary connection lines, the plurality of through-holes thereof is formed so as not to overlap each other in a direction perpendicular to a longitudinal direction of the bus bar, such that adjacent ones of the plurality of through-holes are spaced in the longitudinal direction of the bus bar by a region of the rupture portion, and such that no imaginary line extending in a direction perpendicular to the longitudinal direction of the bus bar passes through more than one of the plurality of through-holes of the respective one of the first and second imaginary connection lines,
wherein an imaginary line extending in a direction perpendicular to the longitudinal direction of the bus bar passes through both of the first and second imaginary connection lines at a location inside of the bus bar,
wherein the first imaginary connection line forms a predetermined angle with respect to the second imaginary connection line and crosses the second imaginary connection line at a location outside of the bus bar,
wherein at least some of the plurality of through-holes have different diameters, and
wherein the predetermined angle formed between each of the first and second imaginary connection lines and the longitudinal direction is 30 to 60 degrees.