In a deterioration determination system, a data obtainment unit obtains battery data. A SOH identification unit identifies a state of health (SOH) of a secondary battery on the basis of the battery data. A regression curve generation unit generates a deterioration regression curve of the secondary battery by performing curve regression on a plurality of SOHs of the secondary battery that have been identified in time series. A reference point setting unit sets a reference point on the deterioration regression curve. By performing linear regression on the plurality of SOHs obtained after the reference point, a regression line generation unit generates a deterioration regression line of the secondary battery that follows the reference point. A slope ratio calculation unit calculates a slope ratio between a slope of a tangent line to the deterioration regression curve at the reference point and a slope of the deterioration regression line following the reference point. A sudden deterioration determination unit determines sudden deterioration of the secondary battery on the basis of the slope ratio.
DETERIORATION DETERMINATION SYSTEM, DETERIORATION DETERMINATION METHOD, AND DETERIORATION DETERMINATION PROGRAM
2024-11-07
Patent
Electronic Resource
English
European Patent Office | 2024
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