Determination of the aging of an electric storage system
AssigneeElectricite de France
InventorAurelien Hascoat
Life of this patent
Estimating the term…
Abstract
A method for determining an aging of a battery having a variable state of charge within a cycling window forming a portion of a nominal operating domain. The method comprises: getting a tracking of a state of charge of the battery as a function of time over an interval of time, where the tracking comprises an alternation of calls for charging and discharging within the cycling window; for a plurality of calls over the time interval, getting a value of an electric measure indicative of energy exchanged by the battery during said call and estimating a state of health of the battery during said call based on said value; and determining an aging of the battery, on the basis of the estimated states of health.
Claims11
A method for determining an aging of a second-life battery used in an electric storage system and having a variable state of charge within a cycling window forming a portion of a nominal operating domain, where the method comprises, for the second-life battery:
- getting, from one moment of use of the second-life battery in its second life, a tracking of a state of charge of the second-life battery as a function of time over an interval of time starting at said moment, where the tracking comprises an alternation of calls for charging and discharging within the cycling window;
- for a plurality of calls over the interval of time, getting a value of an electric measure indicative of energy exchanged by the second-life battery during said call and estimating a state of health of the second-life battery during said call based on said value;
- and
- determining an aging of the second-life battery, said aging being incurred by a previous use of the second-life battery prior to said moment of use, said aging being determined on the basis of the estimated states of health without using any data or model pertaining to said previous use of the second-life battery prior to said moment of use.
Dependencies are inferred from the claim text.