The basic idea of the distributed control system is that the vehicle controller collects some driver signals, and at the same time communicates with the motor controller and the battery management system through the CAN bus, and the motor controller and the battery management system separately collect the vehicle signals through the CAN bus passed to the vehicle controller. The vehicle controller analyzes and processes the data based on the vehicle information and combined with the control strategy. After the motor controller and the battery management system receive the control commands, they control the operation of the motor and the discharge of the battery according to the current state information of the motor and battery. The advantages of the distributed control system are modularization and low complexity; the disadvantage is that the cost is relatively high.
The top layer of a typical distributed vehicle control system is the vehicle controller, which receives information from the motor controller and battery management system through the CAN bus, and sends control commands to the motor controller, battery management system and vehicle information display system . The motor controller and the battery management system are responsible for the monitoring and management of the driving motor and the power battery pack respectively, and the on-board information display system is used to display the current status information of the vehicle.