Method for monitoring the health status of a battery

Abstract

Method (100) for monitoring the SOH of a battery, comprising the steps of: Initial charging (110) of the battery until a first predetermined stop voltage U is reached, the initial charging of the battery being carried out by applying a constant current, Resting (120) of the battery for a suitable time so that at the end of the resting period: a battery voltage is equal to, or sufficiently close to, an open circuit voltage OCV of the battery, and a stable battery temperature, obtaining (130) a battery indicator from among: the open circuit voltage OCV of the battery, a DC resistance DCR of the battery, obtaining (140) a battery model taking as input the battery indicator and providing as output the SOH of the battery, and determining (150) the SOH of the battery by providing the obtained indicator (130) to the obtained model (140).Figure to be published with the abbreviation: Figure 1.

Claims

- charge the battery, during additional charging (160) at a current intensity less than or equal to a maximum current intensity, the maximum current intensity being determined from the determined SOH health state (150).

4. A method (100) according to any one of the preceding claims wherein the rest period (120) of the battery is equal to or greater than one hour.

5. Method (100) according to any one of the preceding claims wherein the battery indicator is the open circuit voltage OCV of the battery.

6. Method (100) according to any one of claims 2 to 4 wherein: - the battery indicator is the DC resistance DCR of the battery, and - obtaining (130) the DC resistance DCR of the battery is carried out at the beginning of the additional charging (160) of the battery.

7. An electrical cell management system comprising means for implementing the method according to one of the preceding claims.

8. Aircraft comprising a battery and a battery management system according to the preceding claim.

9. A computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out a method according to any one of claims 1 to 6.

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