US 12,438,208 B2
Battery system thermal event detection method and battery system using the same
Solji Yoo, Daejeon (KR); Hyeon Jin Song, Daejeon (KR); and Wongon Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/927,424
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Sep. 27, 2021, PCT No. PCT/KR2021/013136
§ 371(c)(1), (2) Date Nov. 23, 2022,
PCT Pub. No. WO2022/080699, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 10-2020-0132500 (KR), filed on Oct. 14, 2020.
Prior Publication US 2023/0291021 A1, Sep. 14, 2023
Int. Cl. H01M 10/48 (2006.01); G01R 27/02 (2006.01); G01R 31/00 (2006.01); G01R 31/382 (2019.01); H01M 10/42 (2006.01)
CPC H01M 10/486 (2013.01) [G01R 31/007 (2013.01); G01R 31/382 (2019.01); H01M 10/425 (2013.01); H01M 10/482 (2013.01); G01R 27/025 (2013.01); H01M 2010/4271 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery system comprising:
a battery pack including a plurality of battery cells;
a pressure sensor to measure an internal pressure of the battery pack every sampling cycle; and
a battery management system is configured to:
update a reference pressure based on internal pressures measured at sampling cycles for a sampling period;
calculate a pressure fluctuation amount based on a difference of the internal pressure measured every sampling cycle from the reference pressure; and
determine occurrence of a thermal event in the battery pack if the internal pressure measured every sampling cycle increases consecutively at least two times when the pressure fluctuation amount is greater than or equal to a predetermined threshold pressure.