US 12,456,784 B2
Battery pack
Sei Hoon Cho, Daejeon (KR); Bon Seok Ku, Daejeon (KR); Jun Hee Jung, Daejeon (KR); and Jae Il Hwang, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Jan. 11, 2022, as Appl. No. 17/572,947.
Claims priority of application No. 10-2021-0003987 (KR), filed on Jan. 12, 2021.
Prior Publication US 2022/0223988 A1, Jul. 14, 2022
Int. Cl. H01M 50/581 (2021.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01)
CPC H01M 50/581 (2021.01) [H01M 10/425 (2013.01); H01M 10/482 (2013.01); H01M 10/486 (2013.01); H02J 7/00032 (2020.01); H02J 7/00714 (2020.01); H02J 7/007194 (2020.01); H01M 2010/4271 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
a battery module array comprising a plurality of battery modules coupled in series and having first and second terminals, each of the plurality of battery modules comprising at least one battery cell, a current blocking element coupled to the battery cell and opened when an overcurrent is applied, and a sensor unit measuring state information of the battery cell and transmitting the measured information to a battery management system;
a battery blocking unit comprising a first switch unit coupled to the first terminal in series, a second switch unit coupled to the second terminal in series, and a third switch unit coupled to the first and second terminals in parallel with the plurality of battery modules; and
the battery management system turning on the third switch unit when the measured information exceeds a predetermined threshold value,
wherein the third switch unit turned on by the battery management system opens the current blocking element when the measured information exceeds the predetermined threshold value.