A device for measuring an internal resistance of a laminated type battery with power supplied to a load from the laminated type battery is proposed in WO2012077450.
This measuring device outputs the same alternating currents to a positive electrode terminal and a negative electrode terminal of the laminated type battery such that no current leaks to a load side connected to the laminated type battery. Then, an amplitude of the alternating current output to each electrode is adjusted such that an alternating-current potential difference on a positive electrode side obtained by subtracting a potential of an intermediate-point terminal located between the positive electrode terminal and the negative electrode terminal from a potential of the positive electrode terminal of the laminated type battery and an alternating-current potential difference on a negative electrode side obtained by subtracting the potential of the intermediate-point terminal from a potential of the negative electrode terminal coincide. Then, the internal resistance of the laminated type battery is measured on the basis of the adjusted alternating currents and potential differences.
USPTO Backgrounds
USPTO Backgrounds