US 11,680,990 B2
System and method for estimating state of health of all-solid-state battery
Yong Sub Yoon, Seoul (KR); Hajime Tsuchiya, Yokohama (JP); Yuki Sasaki, Yokohama (JP); and Hironari Takase, Yokohama (JP)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Nov. 30, 2021, as Appl. No. 17/538,373.
Claims priority of application No. JP2021-122525 (JP), filed on Jul. 27, 2021.
Prior Publication US 2023/0057912 A1, Feb. 23, 2023
Int. Cl. G01R 31/392 (2019.01); H01M 10/0562 (2010.01); H01M 10/42 (2006.01)
CPC G01R 31/392 (2019.01) [H01M 10/0562 (2013.01); H01M 10/425 (2013.01); H01M 2010/4271 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of estimating a state of health (SOH) of an all-solid-state battery, comprising:
detecting whether hydrogen sulfide is generated in each cell of the all-solid-state battery; estimating the state of health of the all-solid-state battery corresponding to an amount or an increase rate of generated hydrogen sulfide based on data prepared in advance;
collecting current-voltage data when the all-solid-state battery is being charged, and collecting capacity data when the all-solid-state battery is fully charged;
estimating the state of health of the all-solid-state battery by comparing the current-voltage data and the capacity data when the all-solid-state battery is fully charged with data sets prepared in advance; and
identifying a plurality of deterioration factors of the battery by comparing a first state of health estimated based on the amount of generated hydrogen sulfide with a second state of health estimated based on the current-voltage data and the capacity data when the all-solid-state battery is fully charged.