| 摘要 |
According to an embodiment of the present invention, an electricity storage system has a storage battery, a first derivation unit, a second derivation unit, and a correction unit. The storage battery performs charging/discharging of electricity. The first derivation unit derives a first SOC on the basis of the voltage of the storage battery when a current is not flowing to the storage battery. The second derivation unit derives a second SOC on the basis of the battery capacity of the storage battery and the integrated value of a current flowing to the storage battery. On the basis of a difference between the second SOC derived by the second derivation unit and the first SOC derived by the first derivation unit after the derivation of the second SOC, the correction unit corrects the battery capacity of the storage battery, said battery capacity being to be used by the second derivation unit. Furthermore, the correction unit changes the correction quantity of the correction corresponding to the state of the storage battery. |
