公开(公告)号：US20230291021A1

公开(公告)日：2023-09-14

申请号：US17927424

申请日：2021-09-27

申请人： LG Energy Solution, Ltd.

发明人： Solji Yoo ,  Hyeon Jin Song ,  Wongon Kim

IPC分类号： H01M10/48 ,  H01M10/42 ,  G01R31/382 ,  G01R31/00

CPC分类号： H01M10/486 ,  H01M10/425 ,  H01M10/482 ,  G01R31/382 ,  G01R31/007 ,  H01M2010/4271 ,  G01R27/025

摘要： A battery system includes a battery pack including a plurality of battery cells a pressure sensor located inside the battery pack to measure an internal pressure of the battery pack every sampling cycle; and a battery management system calculating a reference pressure based on an average of internal pressures measured at sampling cycles for a sampling period, calculating a pressure fluctuation amount based on a difference of the internal pressure measured every sampling cycle from the reference pressure, and determining that a thermal event has occurred 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.