Battery evaluation device, battery, battery evaluation method, and program

PROBLEM TO BE SOLVED: To calculate the deterioration progress degree of a storage battery, and determine the fee for rental or the like of the storage battery depending on the deterioration progress degree.SOLUTION: The storage battery evaluation device of an embodiment of the present invention includes: a battery characteristic estimation unit for calculating the battery characteristic including at least one of the battery capacity, internal resistance, and open circuit voltage of a secondary battery, on the basis of data of voltage and current of the secondary battery measured during charge or discharge of the secondary battery; and a deterioration progress degree calculation unit for calculating the deterioration progress degree indicating the progress state of the deterioration of the secondary battery, on the basis of the value related to the performance index of the secondary battery calculated on the basis of the battery characteristic.SELECTED DRAWING: Figure 1