METHOD FOR CONTROLLING SECONDARY CELL AND POWER STORAGE DEVICE

A method for controlling a secondary battery is provided to correct a remaining capacity management value using an optimal correction method according to an operating condition of the secondary battery and a natural environment. The method includes a first energy amount calculating step of calculating an energy amount required for charging from the remaining capacity management value to the vicinity of a charge end, and an energy amount required for discharging from the remaining capacity management value to the vicinity of a discharge end, an energy amount predicting step of predicting a charge/discharge energy amount available for the secondary battery 11, a correction time predicting step of predicting a time required to complete the correction in the vicinity of the charge end, and a time required to complete the correction in the vicinity of the discharge end, based on the calculated energy amount and the predicted energy amount, a correction method selecting step of selecting a correction method having the shorter predicted time of the times predicted by the correction time predicting step, and a charge/discharge controlling step of controlling a state of charge of the secondary battery 11 in such a manner that the remaining capacity management value of the secondary battery 11 is corrected by the selected correction method.