Wireless communication method in battery pack and master BMS providing the method

A communication method between a master battery management system (MBMS) and a slave battery management system (SBMS), the method comprising:

• selecting a plurality of hopping channels from among a plurality of channels existing in a frequency bandwidth;
• calculating a signal intensity of at least one of the selected plurality of hopping channels based on a noise intensity and a reference signal-to-noise (SNR) value;
• and
• generating a frequency hopping sequence based on the calculated signal intensity;
• and
• communicating with the SBMS according to the generated frequency hopping sequence to avoid communication interference or reduced power consumption of the plurality of battery cells.

A non-transitory controller-readable medium containing instructions therein, which when executed by the controller of a master battery management system (BMS), causes the controller to perform a method comprising:

• selecting a plurality of hopping channels from among a plurality of channels existing in a frequency bandwidth;
• calculating a signal intensity of at least one of the selected plurality of hopping channels based on a noise intensity and a reference signal-to-noise (SNR) value;
• and
• generating a frequency hopping sequence based on the calculated signal intensity;
• and
• communicating with at least one slave BMS according to the generated frequency hopping sequence to avoid communication interference or reduced power consumption of a plurality of battery cells associated with the at least one slave BMS.