The invention relates to a method for determining the state of charge of an electric energy store comprising electric energy store cells and at least one sensor,in which method: in a first method step, operating parameters of the electric energy store are determined;in a second method step, at least one maximum state of charge and at least one minimum state of charge are determined as a temporal integral for each electric energy store cell on the basis of a current (I), a current measuring inaccuracy (ΔI), at least one capacitance, a correction value for the minimum state of charge (formula (IA)), and a correction value for the maximum state of charge (formula (IB)) of the electric energy store cells;the correction value for the minimum state of charge (formula (IA)) is determined by means of a minimum state of charge (formula (IIA)) on the basis of a filtered minimum open-circuit voltage (formula (III)) of the electric energy store;the correction value for the maximum state of charge (formula (IB)) is determined by means of a maximum state of charge (formula (IIB)) on the basis of a filtered maximum open-circuit voltage (formula (III)) of the electric energy store;wherein a maximum state of charge (SOCmax) of the electric energy store is the maximum of the maximum states of charge (formula (IVA)) of all the electric energy store cells, and a minimum state of charge (SOCmin) of the electric energy store is the minimum of the minimum states of charge (formula (IVB)) of all the electric energy store cells.
METHOD FOR DETERMINING A STATE OF CHARGE OF AN ELECTRIC ENERGY STORE, ELECTRIC ENERGY STORE, AND DEVICE
2025-04-24
Patent
Electronic Resource
English
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
Method for operating an electric energy store, electric energy store, and device
European Patent Office | 2024
|METHOD FOR OPERATING AN ELECTRIC ENERGY STORE, ELECTRIC ENERGY STORE, AND DEVICE
European Patent Office | 2022
|Energy store housing, motor vehicle, electric energy store and product series
European Patent Office | 2023
|Method for determining availability of electrical energy store, electrical energy store and device
European Patent Office | 2024
|