STORAGE BATTERY CHARACTERISTICS DERIVATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a storage battery characteristics derivation device capable of deriving an equivalent circuit constant of a storage battery with high precision.SOLUTION: A storage battery characteristics derivation device includes a current waveform analysis part that analyzes pulsed charging and discharging current waveforms during the transient response of the storage battery and a constant derivation part that derives part of an equivalent circuit constant of the storage battery based on each data on the charging and discharging currents of the storage battery and a voltage across the storage battery when the charging and discharging current waveforms analyzed by the current waveform analysis part satisfy a first condition and that derives another equivalent circuit constant of the storage battery based on each data of the charging and discharging currents of the storage battery and a voltage across the storage battery when the charging and discharging current waveforms analyzed by the current waveform analysis part satisfy a second condition. The equivalent circuit constant of the storage battery includes a first constant that is dominant at a frequency during a transient response when the first condition is satisfied and a second constant that is dominant at a frequency during a transient response when the second condition is satisfied. A pulse width and a pulse frequency during the transient response when the first condition is satisfied differ from a pulse width and a pulse frequency during the transient response when the second condition is satisfied, respectively.