Back to results
US 11,892,515 B2Granted
Determination device relating to plurality of batteries, electricity storage system, determination method and non-transitory storage medium
AssigneeKabushiki Kaisha Toshiba
InventorsYumi Fujita, Tomokazu Morita, Nobukatsu Sugiyama
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a determination device relating to a plurality of batteries connected in series is provided. The determination device includes a processor. The processor determines 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.
Claims10
A determination device relating to a plurality of batteries which are connected in series, comprising:
- a processor configured to determine 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 processor is configured to:
- estimate 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;
- estimate 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;
- determine the deterioration variance among the batteries, based on at least the first internal state parameter and the second internal state parameter;
- estimate 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
- determine 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.
5 more elements
A determination method relating to a plurality of batteries which are connected in series, comprising:
- 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.
5 more elements
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.
5 more elements
Dependencies are inferred from the claim text.