Battery Management System

Overview:

This project is a Battery Management System (BMS) designed to monitor, control, and protect lithium-ion battery cells.

Description:

Our project implements a comprehensive BMS for multi-cell lithium-ion battery packs using a combination of passive and active balancing. The system is centered around the Texas Instruments BQ769x0 family for cell monitoring and includes a microcontroller (ESP32) for data processing, control, and communication. The schematic includes current sensing (shunt resistor and op-amp), MOSFET-based protection circuitry, temperature sensing, voltage regulators, and communication isolation.

Features:

• BQ769x0 Battery Monitoring IC for multi-cell lithium-ion voltage, current, and temperature sensing

• ESP32 Microcontroller for system control, data processing, and external communication

• Passive Balancing using bleed resistors controlled by the BQ769x0

• Overvoltage, Undervoltage, Overcurrent, Short-Circuit & Overtemperature Protection

• Microcontroller-Based Smart Power Routing from USB or battery sources

• Battery Charging Circuit supporting 10S Li-ion

• Designed for Thermal and Mechanical Stability with proper grounding and heat dissipation consideration