US 12,072,383 B2
Characteristic estimation device for storage battery and characteristic estimation method for storage battery
Tomoki Takegami, Tokyo (JP); and Toshihiro Wada, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/431,430
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Apr. 11, 2019, PCT No. PCT/JP2019/015727
§ 371(c)(1), (2) Date Aug. 17, 2021,
PCT Pub. No. WO2020/208762, PCT Pub. Date Oct. 15, 2020.
Prior Publication US 2022/0155375 A1, May 19, 2022
Int. Cl. G01R 31/36 (2020.01); G01R 31/367 (2019.01); G01R 31/3842 (2019.01); H01M 10/48 (2006.01)
CPC G01R 31/367 (2019.01) [G01R 31/3842 (2019.01); H01M 10/48 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A characteristic estimation device for a storage battery, comprising:
voltage detection circuitry to detect a terminal voltage of the storage battery;
time-series data acquisition circuitry to acquire time-series data on the terminal voltage in a stopped state of the storage battery;
model provision circuitry to provide a storage battery model that includes an OCV term for expressing OCV of the storage battery, and an interparticle diffusion term which is based on a fundamental solution of a one-dimensional diffusion equation expressing ion diffusion among particles forming an electrode of the storage battery; and
model parameter estimation circuitry to estimate a model parameter of the storage battery model based on the time-series data on the terminal voltage acquired by the time-series data acquisition circuitry and on the storage battery model provided by the model provision circuitry.