BATTERY CONTROL DEVICE FOR RESPONDING TO LOSS OF COMMUNICATION SITUATION, AND ENERGY STORAGE SYSTEM COMPRISING SAME

According to embodiments of the present invention, an energy storage system may include a plurality of battery management systems (BMSs) provided in correspondence to a plurality of batteries, respectively; and an upper control apparatus configured to collect state information on the plurality of batteries from the plurality of BMSs and to monitor or control the plurality of batteries based on the collected state information.Here, the upper control apparatus may be configured to, upon the state information of the first battery being not received from a first BMS due to a loss of communication, select a second battery from among a plurality of batteries based on previously stored history information of batteries and use the state information of the second battery as the state information of the first battery.