ELECTRICITY STORAGE SYSTEM AND METHOD FOR CONTROLLING DISCHARGING OF SAID ELECTRICITY STORAGE SYSTEM

摘要

This invention allows balanced discharging in an electricity storage system that has a plurality of rechargeable batteries connected in parallel. Said electricity storage system has a plurality of rechargeable batteries (100a through 100f) connected in parallel and a battery electricity storage device (120) that, for each of said rechargeable batteries (100a through 100f), sets, at least an output voltage when said rechargeable battery (100a through 100f) is discharging. The battery electricity storage device (120) has a discharge control circuit (121) that allocates at least one of the rechargeable batteries to a master on the basis of at least the states of charge of or voltages across the rechargeable batteries, enabling the output voltages between the master and the other rechargeable batteries to varied.