Abstract: A battery management system includes: a battery module accommodation section; a charging and discharging control section; and a shipping target selection section. The battery module accommodation section is configured to separately accommodate a plurality of battery modules in blocks. The blocks each includes a predetermined number of the battery modules. The predetermined number is greater than or equal to 2. The charging and discharging control section is configured to charge and discharge the battery modules in units of the blocks. The battery modules are accommodated in the battery module accommodation section. The shipping target selection section is configured to select, in units of the blocks, the battery modules serving as shipping targets from the battery modules accommodated in the battery module accommodation section.

Abstract: A higher usage fee is set for external supply power as predetermined contract power increases. A battery management system includes: a contract power information acquisition section configured to acquire contract power information indicating the contract power; a power-in-use estimation section configured to estimate power in use in the storage plant in a target time zone in future; a discharge plan creation section configured to create a discharge plan in which discharge power from the battery is supplied as power to be used in the storage plant when the power in use in the target time zone exceeds the contract power; and a discharging control section configured to discharge the battery on the basis of the discharge plan. The power in use in the target time zone is estimated by the power-in-use estimation section.