Title:
SECONDARY BATTERY DIAGNOSTIC METHOD, SECONDARY BATTERY DIAGNOSTIC PROGRAM, AND SECONDARY BATTERY DIAGNOSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/029501
Kind Code:
A1
Abstract:
Provided is a secondary battery diagnostic method capable of evaluating a remaining service life of a secondary battery more accurately than in the past, without disassembling the secondary battery. This secondary battery diagnostic method includes: a parameter estimating step (step S1) for employing a predetermined model formula to estimate, on the basis of data obtained by measuring a load characteristic of a secondary battery being diagnosed, characteristic parameters, at a diagnosis time point, of the secondary battery being diagnosed, the characteristic parameters including an electrolytic solution diffusion coefficient Dn, at the diagnosis time point, of the secondary battery being diagnosed; a threshold estimating step (step S5) for employing a trained model to estimate, on the basis of input data, which are data including some of the characteristic parameters at the diagnosis time point, a threshold Dth of the electrolytic solution diffusion coefficient of the secondary battery being diagnosed; and a difference calculating step (step S4) for finding a difference ΔD between the threshold Dth and the electrolytic solution diffusion coefficient Dn at the diagnosis time point.
Inventors:
KISHIMI YUKO (JP)
MATSUMOTO NOBUAKI (JP)
MATSUMOTO NOBUAKI (JP)
Application Number:
PCT/JP2023/027999
Publication Date:
February 08, 2024
Filing Date:
July 31, 2023
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
G01R31/392; G01R31/367; G01R31/387; H01M10/48; H02J7/00
Domestic Patent References:
| WO2023149532A1 | 2023-08-10 |
Foreign References:
| US20160131715A1 | 2016-05-12 | |||
| US20200074297A1 | 2020-03-05 | |||
| JP2017097997A | 2017-06-01 | |||
| JP2013141379A | 2013-07-18 | |||
| JPH09115554A | 1997-05-02 |
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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