Method for controlling secondary battery and power storage device

摘要

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 are calculated. A charge/discharge energy amount available for the secondary battery is predicted. 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 are predicted based on the calculated energy amount and the predicted energy amount. A correction method having the shorter predicted time of the predicted times is selected. A state of charge of the secondary battery is controlled in such a manner that the remaining capacity management value of the secondary battery is corrected by the selected correction method.

主权项

1. A method for controlling a secondary battery as a target for a correction of a remaining capacity management value, in such a manner that said remaining capacity management value is corrected to one of at a predetermined percentage of a charge end and to at a predetermined percentage of a discharge end, the method comprising:
a first energy amount calculating step of calculating an energy amount required for charging from said remaining capacity management value to the predetermined percentage of said charge end, and an energy amount required for discharging from said remaining capacity management value to the predetermined percentage of said discharge end; an energy amount predicting step of predicting a charge/discharge energy amount available for said secondary battery; a correction time predicting step of predicting a time required to complete the correction of said remaining capacity management value to at the predetermined percentage of said charge end, and a time required to complete the correction of said remaining capacity management value to at the predetermined percentage of said discharge end, based on the energy amount calculated by said first energy amount calculating step, and the energy amount predicted by said energy amount predicting step; a correction method selecting step of selecting a correction method having the shorter predicted time of the times predicted by said correction time predicting step; and a charge/discharge controlling step of controlling a state of charge of said secondary battery so as to correct said remaining capacity management value of said secondary battery by said selected correction method.