This invention relates to the field of electronic technology, specifically to an automatic ID configuration circuit for multiple slave controllers in a battery
management system. The circuit includes a main board and several slave boards, which are connected in series and electrically connected to the main board. Each slave board is electrically connected to a battery box. Each slave board is equipped with a configuration
resistor R1, an AD sampling module group, and a main
chip MCU. The main
chip MCU obtains the slave board ID code by dividing the
voltage across the
resistor by the
voltage drop across the configuration
resistor R1, and transmits the ID code and the
voltage information to the slave board. This invention requires only one power supply from the main board, and the multiple slave boards are connected in series, simplifying
assembly, eliminating
signal transmission, and providing strong anti-interference capabilities. The main board power supply output does not require separate isolation, and the slave board hardware only needs two ADCs for acquisition, resulting in low
chip resource consumption. The slave board hardware and
software are identical and can be directly replaced, reducing inventory pressure. Furthermore, no additional ID configuration is required, improving
system stability and reliability.