Provided is a device or the like that can improve the accuracy of battery performance evaluation of a rechargeable battery. Parameter values of a rechargeable battery model are identified on the basis of a measurement result of a complex impedance Z of a first rechargeable battery 221. The rechargeable battery model expresses an impedance of an internal resistance of the first rechargeable battery 221 with transfer functions representing IIR and FIR systems, respectively. Performance of a second rechargeable battery 222 is evaluated on the basis of a result of contrast between a voltage response characteristic V(t) that is output from a rechargeable battery 220 as the second rechargeable battery 222 when an impulse current I(t) is input to the second rechargeable battery 222, and a model voltage response characteristic Vmodel(t) when the impulse current is input to the rechargeable battery model having the parameter values identified.