DEGRADATION RATE IDENTIFYING DEVICE, DEGRADATION RATE IDENTIFYING METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To identify a degradation rate of a secondary battery with a scheme different from that for determining the degradation rate of the secondary battery from a combination of a current value and a voltage value of the secondary battery and an internal resistance value of the secondary battery that does not degrade.SOLUTION: A BMU 16 includes: an internal-resistance identifying unit 107; and a degradation-rate identifying unit 109. The internal-resistance identifying unit 107 identifies an internal resistance value of a secondary battery that does not degrade on the basis of the temperature of the secondary battery and the charge rate of the secondary battery. The degradation-rate identifying unit 109 identifies a degradation rate of the internal resistance value on the basis of a physical quantity related to charging/discharging of the secondary battery, the temperature of the secondary battery, and the internal resistance value identified by the internal-resistance identifying unit 107.