US 12,032,035 B1
Method for estimating the resistive state of health of at least one electrical energy storage element of an electric battery
Akram Eddahech, Guyancourt (FR); and Kodjo Senou Rodolphe Mawonou, Elancourt (FR)
Assigned to STELLANTIS AUTO SAS, Poissy (FR)
Appl. No. 18/566,946
Filed by STELLANTIS AUTO SAS, Poissy (FR)
PCT Filed Apr. 21, 2022, PCT No. PCT/FR2022/050753
§ 371(c)(1), (2) Date Dec. 4, 2023,
PCT Pub. No. WO2022/258895, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 2106129 (FR), filed on Jun. 10, 2021.
Int. Cl. G01R 31/392 (2019.01); G01R 31/374 (2019.01); G01R 31/3842 (2019.01); G01R 31/389 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/374 (2019.01); G01R 31/3842 (2019.01); G01R 31/389 (2019.01)] 10 Claims
OG exemplary drawing
 
1. A method, implemented in an electric battery management system of a vehicle, of estimating the resistive state of health of at least one electrical energy storage element of said electric battery, wherein the method comprises the next steps:
determining at least one operating range for which the direct current resistance of said at least one electrical energy storage element changes linearly with respect to a pair of variables consisting of the state of charge of the storage element and of the temperature;
measuring, for several operating points of said at least one determined operating range and for a predefined duration, the variation in the strength and the voltage of an electric current generated by said at least one electrical energy storage element during at least one running phase of the vehicle;
calculating, based on the measured values of variation in strength and voltage and for each of said operating points, at least one direct current resistance value of said at least one electrical energy storage element; and
calculating, for each of said operating points, based on the direct current resistance value calculated for said operating point, at least one value of the resistive state of health of said at least one electrical energy storage element.