US 11,929,472 B2
Battery diagnosing apparatus and method
Kyung-Hwa Woo, Daejeon (KR); Yoon-Jung Bae, Daejeon (KR); and A-Ming Cha, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/922,410
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Oct. 12, 2021, PCT No. PCT/KR2021/014053
§ 371(c)(1), (2) Date Oct. 31, 2022,
PCT Pub. No. WO2022/080837, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 10-2020-0131451 (KR), filed on Oct. 12, 2020.
Prior Publication US 2023/0198038 A1, Jun. 22, 2023
Int. Cl. H01M 10/48 (2006.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01)
CPC H01M 10/486 (2013.01) [H01M 10/425 (2013.01); H01M 10/443 (2013.01); H01M 2010/4271 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery diagnosing apparatus, comprising:
a voltage sensor configured to measure a voltage of a battery;
a temperature sensor configured to measure a temperature of the battery;
a controller; and
memory having programmed thereon instructions that, when executed by the controller, cause the controller to:
calculate a capacity change rate by comparing the discharge capacity of the battery with a reference capacity;
calculate a resistance change rate by comparing an ohmic resistance determined based on an impedance profile generated for the battery with a reference resistance;
determine an internal gas generation level of the battery by comparing magnitudes of the calculated resistance change rate and a threshold resistance change rate; and
determine an internal gas generation cause of the battery by comparing magnitudes of the calculated capacity change rate and a threshold capacity change rate.