DETERIORATION DEGREE DETERMINATION DEVICE

Japanese Patent JP2023021481

A

To provide a deterioration degree determination device for improving determination accuracy while shortening a time to determine the deterioration degrees of secondary batteries constituting a battery pack.SOLUTION: A deterioration degree determination device 1 determines the deterioration degrees of secondary batteries 21-28 constituting a battery pack 2. A battery characteristic acquisition section 11 acquires battery characteristics of the secondary batteries 21-28 during charging/discharging. A reference deterioration degree estimation section 14 estimates the deterioration degree of a reference secondary battery 20 based on the use history of the reference secondary battery 20. A feature value generation section 15 generates a feature value for each one of the secondary batteries 21-28 based on the battery characteristics or battery characteristic relation values. A deterioration degree variation estimation section 16 compares the feature value of the reference secondary battery 20(21) with the feature values of the secondary batteries 22-28, so as to estimate variations of the deterioration degrees of the secondary batteries 22-28 from the reference secondary battery 20. A deterioration degree estimation section 17 estimates the deterioration degrees of the secondary batteries 22-28 other than the reference secondary battery 20 in the battery pack 2 based on the deterioration degree of the reference secondary battery 20 and the estimation results of the variations.SELECTED DRAWING: Figure 1

SUZUKI SHOGO
KUSANO YOSHIKAZU
YAMAMOTO NOBUO

JP2021126363A

February 14, 2023

August 02, 2021

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DENSO CORP

G01R31/392; G01R31/382; G01R31/385; H01M10/42; H01M10/44; H01M10/48; H02J7/00

Patent Attorney Corporation Aichi International Patent Office

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