US 12,442,865 B2
Diagnostic method
Meiko Ueyama, Tokyo (JP); Hiroshi Abe, Tokyo (JP); and Shun Kimijima, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Oct. 21, 2022, as Appl. No. 17/971,122.
Claims priority of application No. 2021-180443 (JP), filed on Nov. 4, 2021.
Prior Publication US 2023/0133469 A1, May 4, 2023
Int. Cl. G01R 31/392 (2019.01); G01R 31/36 (2020.01); G01R 31/3828 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/3648 (2013.01); G01R 31/3828 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A diagnostic method to be implemented by a computer, the diagnostic method comprising:
receiving, from an ammeter, a current value of a current flowing through a battery used as a power source for a drive motor measured by the ammeter;
generating a mirror current based on the current value measured by the ammeter, the mirror current simulating a usage state of the battery in a dummy battery;
causing the mirror current to flow through the dummy battery to reproduce the usage state of the battery in the dummy battery;
conducting a deterioration diagnosis of the dummy battery through which the mirror current flows;
in a case where it is determined in the deterioration diagnosis that the dummy battery is deteriorated, conducting a reversible deterioration diagnosis of the dummy battery based on the usage state of the battery; and
determining whether the battery is reusable based on the reversible deterioration diagnosis.