ENERGY STORAGE SYSTEM AND RECHARGEABLE BATTERY CONTROL METHOD

摘要

This energy storage system has a plurality of rechargeable battery packs and a superordinate control unit. With some of the rechargeable battery packs discharging, if additional rechargeable battery packs that are not discharging are connected in parallel with the rechargeable battery packs that are in the middle of discharging, and begin to discharge, the superordinate control unit predicts the discharge start time at which the voltage between the terminals of the additional rechargeable battery packs that are to discharge and the rechargeable battery packs that are in the middle of discharging coincides. Furthermore, the superordinate control unit initiates discharging in the additional rechargeable battery packs that are to discharge at the discharge start time.