Method of assigning communication ID and battery pack providing the method

A method of assigning, by a master BMS, a communication ID of each of a plurality of slave BMSs configured to manage a corresponding one of a plurality of serially connected battery modules including a plurality of serially connected battery cells in a battery pack, the method comprising:

• transmitting a discharge command to a corresponding slave BMS among the plurality of slave BMSs and controlling the corresponding slave BMS so that a predetermined battery module among the plurality of battery modules is discharged for a predetermined discharge period;
• when the discharge period elapses, transmitting a charge command to the plurality of slave BMSs to control the plurality of slave BMSs to charge the plurality of battery modules;
• determining a battery module among the plurality of battery modules that includes a low-voltage battery cell having a second cell voltage after the charging of the battery cell lower than a first cell voltage before the charging of the battery cell as a battery module located at a higher potential adjacent to the discharged battery module, and estimating a connection order of the plurality of battery modules;
• and
• assigning a communication ID of each of the plurality of slave BMSs based on the estimated connection order of the plurality of battery modules.