Arduino based battery management module

The power supply is connected from the four-string battery pack, passes through the protection circuit, and then is isolated and reduced by the power module, and is used by the MCU, voltage and current detection circuits and other parts. The protection circuit is used to protect the safety of the battery pack and has overvoltage, undervoltage and overcurrent protection functions. The voltage detection circuit measures the voltage values ​​of the four strings of batteries in the battery pack, and the current detection circuit measures the current values ​​of the battery pack and sends them to the MCU respectively. The MCU communicates with the programming computer through a USB to serial port circuit. The MCU receives the measured voltage, current, temperature and other values, estimates the battery power, and communicates with the host computer through the I ² C/SMBUS interface. The interface for connecting the temperature sensor and writing MCU firmware is introduced.