US 12,142,744 B2
System and method for detecting battery cell swelling
Yee Gahng Song, Daejeon (KR); and Seung Min Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Feb. 15, 2023, as Appl. No. 18/109,985.
Application 18/109,985 is a division of application No. 16/763,504, granted, now 11,611,114, previously published as PCT/KR2019/000922, filed on Jan. 22, 2019.
Claims priority of application No. 10-2018-0008898 (KR), filed on Jan. 24, 2018.
Prior Publication US 2023/0253642 A1, Aug. 10, 2023
Int. Cl. H01M 10/63 (2014.01); H01M 10/48 (2006.01); H01M 10/6563 (2014.01)
CPC H01M 10/63 (2015.04) [H01M 10/486 (2013.01); H01M 10/6563 (2015.04)] 9 Claims
OG exemplary drawing
 
1. A swelling detection method of a battery cell, the method comprising:
a temperature measurement step of measuring two or more temperatures of a battery module at regular intervals;
an abnormal condition determination step of determining a temperature abnormal condition of the battery module by using two or more temperature values of the battery module measured in the temperature measurement step;
a cooling fan operation step of operating a cooling fan of the battery module according to a determination result of the abnormal condition determination step; and
a swelling occurrence determination step of determining whether swelling of the battery module has occurred based on the two or more temperature values measured in the temperature measurement step,
wherein the swelling occurrence determination step is performed after a predetermined time after the cooling fan operation step is performed,
wherein a change in a width of a cooling passage is determined based on the measured two or more temperatures of the battery module, and
wherein the cooling fan operation step is controlled based on the change in the width of the cooling passage due to swelling.