The present invention relates to a method and a system for determining a maximum charge current (i max ) or a maximum discharge current (i,in) of an energy storage cell (103) of an energy storage device (102). The method comprises providing a predetermined upper voltage limit (V max ) or lower voltage limit (V min ), and providing a time horizon (t) as a time difference from a present time (t) to a future time (t+t). With a repetition time period (T) different from the time horizon, repeating measuring a present voltage level (V) of the energy storage cell; calculating a voltage difference (V) between the present voltage level and the upper voltage limit (V max ) or the lower voltage limit (V min ); and determining the maximum charge current (i max ) or maximum discharge current (i min ) corresponding to the voltage difference and a model, such that the estimated voltage is within the voltage limits.
Power and current estimation for batteries
Leistungs- und Stromschätzung für Batterien
Estimation d'énergie et de courant pour batteries
2021-04-21
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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