Disclosed is a method of determining a resonance frequency interval containing the resonance frequency of a rechargeable battery. The method comprises applying periodic current or voltage signals of different frequencies in succession to a battery cell of the battery. The method also comprises measuring of the temperatures of the battery cell occurring for the different frequencies. In addition, the method comprises comparing of the temperatures, and subsequent selection of an initial frequency of the different frequencies as a first interval value of the resonance frequency interval and a second frequency of the different frequencies as a second interval value of the resonance frequency interval based on the comparison of the temperatures.