US 12,482,906 B2
Sensing assembly and battery module
Sei Hoon Cho, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Sep. 9, 2021, as Appl. No. 17/470,044.
Claims priority of application No. 10-2020-0118359 (KR), filed on Sep. 15, 2020.
Prior Publication US 2022/0085470 A1, Mar. 17, 2022
Int. Cl. H01M 50/569 (2021.01); H01H 85/046 (2006.01); H01M 10/48 (2006.01); H01M 50/519 (2021.01); H01M 50/583 (2021.01); H05K 1/02 (2006.01); H05K 1/14 (2006.01)
CPC H01M 50/569 (2021.01) [H01H 85/046 (2013.01); H01M 10/482 (2013.01); H01M 50/519 (2021.01); H01M 50/583 (2021.01); H05K 1/028 (2013.01); H05K 1/14 (2013.01); H05K 2201/10037 (2013.01); H05K 2201/10181 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A sensing assembly, comprising:
two first substrates, each of the first substrates formed of a rigid printed circuit board and each of the first substrates including at least one first terminal and at least one second terminal on one surface;
a second substrate formed of a flexible printed circuit board and comprising at least one sensing line electrically connected to the first terminal formed on each of the two first substrates and connecting the two first substrates; and
two sensing legs, wherein a first of the two sensing legs is electrically connected between the second terminal formed on a first one of the two first substrates and a first one of two bus bars included in a battery cell stack, a second of the two sensing legs is electrically connected between the second terminal formed on a second one of the two first substrates and a second one of the two bus bars included in the battery cell stack, and each of the two sensing legs comprises a fuse part configured to disconnect when an over current flows,
wherein the two sensing legs are formed of a flexible printed circuit board,
wherein one surface of each of the two sensing legs faces one surface of a corresponding first substrate to form an electrical connection part and is electrically connected to the second terminal of the corresponding first substrate through the electrical connection part,
wherein each of the two sensing legs is directly connected to each of the two bus bars through welding,
wherein, the two first substrates include one first substrate adjacent to a first bus bar connected to a first cell tab provided at one side of a battery cell, and another first substrate adjacent to a second bus bar connected to a second cell tab provided at the other side of the battery cell,
wherein, the second substrate connects the one first substrate and the other first substrate, and
wherein, the two sensing legs include a first sensing leg connecting the one first substrate and the first bus bar, and a second sensing leg connecting the other first substrate and the second bus bar.