Method for determining the deterioration of a battery
View Patent ↗This objective is achieved according to the present invention in that in a method for determining the deterioration of a battery, the charge and discharge cycles of the battery are measured by number and depth of the charge/discharge. For each of the charge and discharge cycles, a characteristic deterioration value is determined on the basis of a deterioration curve that is characteristic of the specific battery type. These individual characteristic deterioration values are then summed up to obtain the deterioration of the battery.
1. A method for determining a deterioration of a battery, comprising:
measuring respective numbers of charge and discharge cycles at a plurality of depths of discharge of the battery;
determining a respective characteristic deterioration value for at least some of the charge and discharge cycles at each of the plurality of depths of discharge using a deterioration curve characteristic of a type of the battery; and
summing the determined characteristic deterioration values so as to obtain the deterioration of the battery;
wherein each respective charge and discharge cycle is a respective partial cycle, the measuring being performed so as to measure the respective partial cycle separately;
wherein the deterioration curve is a continuous function defining a dependence of each characteristic deterioration value on the depth of the respective charge or discharge for the battery type.
2. The method as recited in claim 1 wherein the deterioration curve includes approximated intervals having a class width adapted to the respective battery type, the deterioration curve defining a dependence of a respective characteristic deterioration value on the depth of the respective charge or discharge.
3. The method as recited in claim 1 wherein the deterioration curve is, in at least a section, adapted to a condition currently prevailing in a region of the battery using a weighting factor.
4. The method as recited in claim 3 wherein the weighting factor is dependent on a temperature.
5. The method as recited in claim 3 wherein the weighting factor is dependent on a direction and an intensity of a current of the respective charge or discharge cycle.
6. The method as recited in claim 4 wherein the weighting factor is dependent on a direction and an intensity of a current of the respective charge or discharge cycle.
7. The method as recited in claim 1 wherein the deterioration curve is a continuous function defining a dependence of each characteristic deterioration value on the depth of the respective charge or discharge for the battery type.
8. The method as recited in claim 1 wherein the deterioration curve includes approximated intervals having a class width adapted to the respective battery type, the deterioration curve defining a dependence of a respective characteristic deterioration value on the depth of the respective charge or discharge.
9. The method as recited in claim 1 wherein the deterioration curve is, in at least a section, adapted to a condition currently prevailing in a region of the battery using a weighting factor.
10. The method as recited in claim 9 wherein the weighting factor is dependent on a temperature.
11. The method as recited in claim 9 wherein the weighting factor is dependent on a direction and an intensity of a current of the respective charge or discharge cycle.
12. The method as recited in claim 10 wherein the weighting factor is dependent on a direction and an intensity of a current of the respective charge or discharge cycle.
13. The method as recited in claim 1 wherein the at least some of the charge and discharge cycles does not include charge or discharge cycles having a respective depth of charge or discharge below a predetermined limit.
14. The method as recited in claim 1 wherein the battery is configured to be used in a motor vehicle for supplying electric power to electronic auxiliary components.
15. The method as recited in claim 1 wherein the battery is configured to be used in a motor vehicle for supplying electric power to propulsion components.
16. The method as recited in claim 1 wherein the at least some of the charge and discharge cycles does not include charge or discharge cycles having a respective depth of charge or discharge below a predetermined limit.
17. The method as recited in claim 1 wherein the battery is configured to be used in a motor vehicle for supplying electric power to electronic auxiliary components.
18. The method as recited in claim 1 wherein the battery is configured to be used in a motor vehicle for supplying electric power to propulsion components.