DETERMINING THE CAPACITY OF ELECTRICAL ENERGY STORAGE SYSTEMS

The invention relates to a method for the temperature-compensated detection of a dischargeable charge amount of an accumulator, comprising the following steps: operating a battery as an energy source, whereby the battery is partially discharged, detecting the operating temperature of the battery during the operation of a battery as the electrical energy source, and proving an estimated value of the total capacity of the battery. According to the invention, the dischargeable charge amount is detected and any temperature error based on the dischargeable charge amount is compensated in that a factor is provided, which results from the ratio of a first open-circuit voltage difference to a second open-circuit voltage difference. The first open-circuit voltage difference is the difference between the current open-circuit voltage of the battery and the minimum open-circuit voltage of the battery at the operating temperature, and the second open-circuit voltage difference is the difference between a current maximum open-circuit voltage of the battery and the minimum open-circuit voltage of the battery at the operating temperature. The dischargeable charge amount is provided as the result of a multiplication of the factor by the estimated value of the total capacity.