Study of battery management system of electric vehicle

The design of master-slave control mode battery management system based on CAN bus technology that uses PICl8FXX8 MCU as the core is introduced in this paper.Each battery of the system is controled individually.The system is provided with the function of adjusting the current value with the PWM technology and governing the battery voltage equilibrium with the PWM distributing method during constant current charging.It has distributed structure with the advantages of easy embedding,simple circuit,fewer external devices,strong anti-jamming capability,and high reliability.