BMS & Cell Balancing for EV

Project information

  • Category: Battery Management System Firmware
  • Project Time Frame: Year 2025-2026
  • Project GitHub URL: Here
  • Number of Contributors: 2

Developing a BMS firmware, programming BQ79616 & BQ79600 IC

  • Established a daisy chain communication system with 12 stack of BQ79616 cell balancing IC via BQ79600 ISOSPI bridge, programmed the STM32H Microcontroller using hardware abstraction layer to communicate with BQ79600 bridge using UART
  • Wrote top layer functions to monitor cell voltages, temperatures, open links, and other faults, allowing proper trigger of BMS fault and the shutdown circuit
  • Implemented manual passive cell balancing algorithm along with a cell balancing finite state machine based on charging state or driving state