Design and Implementation of Smart Battery Management System using ESP32

The proposed Smart Battery Management System using ESP32 provides an integrated solution for monitoring, protection, and management of a rechargeable cell pack. The system continuously monitors important parameters such as voltage, current, temperature, gas level, and State of Charge (SOC). ESP32 processes the sensor data and takes appropriate control actions according to the defined safety conditions.   The SOC of the cell pack is estimated and displayed on the 16×2 I2C LCD, allowing the user to easily observe the battery condition. During charging, the charging LED provides a visual indication of the charging process. The system also provides automatic protection against overvoltage, undervoltage, overcurrent, high temperature, gas detection, and sensor failure. When an unsafe condition occurs, the main relay disconnects the cell pack, and the buzzer provides an alert.   Temperature management is achieved by automatically operating the exhaust fan when the temperature exceeds the specified limit. In addition, the integration of Blynk IoTenables remote monitoring and selected control functions through Wi-Fi, making the system more convenient and intelligent.   Overall, the developed system demonstrates that an ESP32-based Smart BMS can provide low-cost, real-time, multifunctional battery monitoring and protection. The proposed system improves operational safety, reliability, and ease of battery management and can be extended for practical applications such as electric vehicles, solar energy storage, UPS systems, and other rechargeable energy-storage systems.

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