KETEP 세계에너지시장정보

A battery safety evaluation apparatus comprising a computer apparatus configured to perform a process of: a battery characteristic estimator (25) configured to estimate an estimation value of an inner state parameter of a first battery which is a secondary battery to be evaluated on the basis of data on voltage and current of the first battery measured in charging or discharging the first battery; a heat estimator (273) configured to estimate a heat of the first battery upon change of an external temperature on the basis of first reference data which is reference data at least indicating relationship between a heat of a secondary battery and the external temperature and is set to correspond to the first battery on the basis of the estimation value; and a safety index calculator (274) configured to calculate a safety index regarding a temperature of the first battery upon change of the external temperature on the basis of the heat of the first battery; to calculate the temperature of the first battery at the external temperature on the basis of the heat of the first battery estimated by the heat estimator, a specific heat of the first battery, a heat transfer coefficient between the first battery and an outside of the first battery, and the external temperature; and to calculate the safety index on the basis of the calculated temperature of the first battery.