US 12,422,496 B2
Secondary battery life evaluation device and method thereof
Yong Chan Kim, Yongin-si (KR); Hye Won Kim, Yongin-si (KR); Seon Hye Yoon, Yongin-si (KR); Su Jin Park, Yongin-si (KR); Seon Yeong Lee, Yongin-si (KR); Hack Jun Lee, Yongin-si (KR); and Chan Yeong Kim, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Oct. 18, 2023, as Appl. No. 18/381,328.
Claims priority of application No. 10-2022-0185658 (KR), filed on Dec. 27, 2022.
Prior Publication US 2024/0210487 A1, Jun. 27, 2024
Int. Cl. G01R 31/392 (2019.01); G01R 31/367 (2019.01); G01R 31/389 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/367 (2019.01); G01R 31/389 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A method for evaluating a life of a secondary battery, comprising:
an evaluation condition input process of inputting a temperature, a charging rate, and a discharging rate to evaluate the life of the secondary battery;
a data computation process of computing an evaluation period, in which a state of health of the secondary battery reaches a set range, a capacity degradation rate, and a direct current internal resistance change rate; and
an acceleration factor calculation process of calculating an acceleration factor of the secondary battery using a first equation,
the first equation being that the acceleration factor is equal to a direct current internal resistance increase rate divided by the capacity degradation rate.