Wireless battery management system and battery pack including same

A wireless battery management system comprising:

• a plurality of slave battery management system (BMSs) coupled to a plurality of battery modules in one-to-one correspondence, each slave BMS operating in an active mode and a sleep mode using power supplied from the battery module to which the slave BMS is coupled, and, in the active mode, configured to wirelessly transmit a detection signal indicating a state of the battery module to which the slave BMS is coupled;
• and
• a master BMS configured to:
• wirelessly receive the detection signal from each of the plurality of slave BMSs, and
• calculate a state of charge (SOC) of each of the plurality of battery modules based on the detection signal, and set a scan cycle for each of the plurality of slave BMSs of scanning the master BMS based on the SOC of each of the plurality of battery modules to switch from the sleep mode to the active mode and wirelessly transmit a control signal to each of the plurality of slave BMSs, the control signal including a wireless balancing command indicating the scan cycle set for each of the plurality of slave BMSs.