Title:
SECONDARY BATTERY DIAGNOSTIC METHOD AND SECONDARY BATTERY DIAGNOSTIC PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/149532
Kind Code:
A1
Abstract:
The present invention provides a secondary battery diagnostic method that can evaluate the remaining life of a secondary battery more accurately than in the past without disassembling the secondary battery. The secondary battery diagnostic method comprises: a step for estimating the characteristic parameters at the time of diagnosis of the secondary battery to be diagnosed (step S1); a step for finding the relationship between the electrolyte diffusion coefficient and the discharge capacity (step S2); a step for determining the threshold Dth of the electrolyte diffusion coefficient on the basis of the relationship between the electrolyte diffusion coefficient and the discharge capacity (step S3); and a step for establishing the difference ∆D between the threshold Dth and an electrolyte diffusion coefficient Dn at the time of diagnosis (step S4).
Inventors:
KISHIMI YUKO (JP)
MATSUMOTO NOBUAKI (JP)
MATSUMOTO NOBUAKI (JP)
Application Number:
PCT/JP2023/003516
Publication Date:
August 10, 2023
Filing Date:
February 03, 2023
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
H01M10/48; G01R31/367; G01R31/392; H01M10/44
Foreign References:
| JP2017097997A | 2017-06-01 | |||
| JP2010060406A | 2010-03-18 |
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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