Does the Bluetooth module on the BMS control board cause electromagnetic interference with other modules?

Yes, Bluetooth modules can cause electromagnetic interference with other modules. The Bluetooth module itself is a radio frequency transmitter and receiver operating in the 2.4GHz ISM band. It may interfere with nearby sensitive analog circuits such as sampling circuits, and may also be interfered with by other high-frequency noise sources such as switching power supplies and digital clocks, leading to shortened communication distance or unstable connections.

Suppressing interference requires attention to layout and filtering: keep the Bluetooth module away from sensitive circuits and noise sources, and provide its power supply with independent ferrite beads and capacitor filters. Ensure a clear clearance around the Bluetooth antenna. If necessary, a shielding cover can be added to the Bluetooth module. Good PCB layout and power supply decoupling are key to ensuring its compatibility and coexistence with other modules.