US 12,248,028 B2
Method of predicting lifespan of battery cell reflecting storage characteristics of positive electrode active material
Su Han Park, Daejeon (KR); Sung Hoon Bae, Daejeon (KR); Dae Sik Chung, Daejeon (KR); and Young Hwan Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/800,030
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Aug. 17, 2021, PCT No. PCT/KR2021/010889
§ 371(c)(1), (2) Date Aug. 16, 2022,
PCT Pub. No. WO2022/039473, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 10-2020-0105113 (KR), filed on Aug. 21, 2020.
Prior Publication US 2023/0341468 A1, Oct. 26, 2023
Int. Cl. G01R 31/392 (2019.01); G01R 31/367 (2019.01); G01R 31/396 (2019.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/367 (2019.01); G01R 31/396 (2019.01); H01M 10/425 (2013.01); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H01M 2010/4271 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for predicting a lifespan of a battery cell, comprising:
virtually dividing a capacity of the battery cell, which is a measurement object for lifespan prediction, into two or more capacity parts;
measuring charge and discharge cycle data for each of the capacity parts;
correcting the charge and discharge cycle data by reflecting storage degeneration a positive electrode active material; and
predicting a lifespan of the battery cell, based on the corrected charge and discharge cycle data,
wherein the measuring the charge and discharge cycle data for each capacity part includes:
determining a number of parts into which the capacity of the battery cell is to be virtually divided;
preparing the battery cells as many as the number of parts; and
measuring charge and discharge cycle data of the battery cells corresponding to the respective capacity parts by repeatedly charging and discharging the battery cells,
wherein during the determining the number of parts and the preparing of the battery cells, the capacity parts of the battery cell are determined based on an output voltage to be matched to the divided parts.