Patent ID: 11892515
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 9:
10. A non-transitory storage medium storing a determination program relating to a plurality of batteries which are connected in series, the determination program causing a computer to implement:
determining a deterioration variance among the batteries, based on first voltage data indicative of a maximum voltage which is greatest among voltages of the batteries in each of measurements in a plurality of periods in charge or discharge of the batteries, and second voltage data indicative of a minimum voltage which is least among the voltages of the batteries in each of the measurements in the periods,
wherein the determining the deterioration variance comprising:
estimating a first internal state parameter as an internal state of the battery as an elemental battery, the first internal state parameter being based on a variation of the maximum voltage in the first voltage data;
estimating a second internal state parameter as an internal state of the battery as the elemental battery, the second internal state parameter being based on a variation of the minimum voltage in the second voltage data;
determining the deterioration variance among the batteries, based on at least the first internal state parameter and the second internal state parameter;
estimating a third internal state parameter indicative of an internal state in an entirety of a series-connected part of the batteries, based on at least third voltage data indicative of a voltage of the series-connected part of the batteries in each of the measurements in the periods in the charge or the discharge of the batteries; and
determining the deterioration variance among the batteries by comparing the third internal state parameter with the first internal state parameter and the second internal state parameter.