Focus on key factors like processing power, functional safety MCU certifications, automotive grade microcontroller standards, ADC resolution, and supported communication interfaces CAN, SPI, LIN. . If you're an electrical engineer working on an electric vehicle (EV) battery management system (BMS), one of the most critical decisions you'll make is selecting the right BMS microcontroller. The microcontroller acts as the brain of your BMS, handling tasks like monitoring battery health, ensuring. . A BMS is a subsystem that monitors and regulates the charging and discharging of batteries. This IC communicates via UART from the host to the device (IC).