AUXILIARY BRAKING SYSTEM FOR ELECTRIC AUTOMOBILE AND CONTROL METHOD THEREOF, AND ELECTRIC AUTOMOBILE

摘要

Provided are an auxiliary braking system (100) for an electric automobile and a control method thereof, and an electric automobile. The system (100) comprises: a speed detection device (110); a braking pedal position detection device (120); and a vehicle control unit (140). When a vehicle speed exceeds a predetermined vehicle speed, the vehicle control unit (140) determines, according to a variation in a braking pedal position and a time of the variation, an acceleration speed at which a braking pedal is pressed by the foot. If the acceleration speed exceeds a predetermined acceleration speed, the vehicle control unit determines, according to the vehicle speed, a wheel rotating speed and a predetermined tire slip ratio, a braking torque, and generates a feedback braking signal according to the braking torque. A wheel motor braking device (130) comprises a wheel braking motor (131). The wheel motor braking device (130) is used to exert a braking force on a wheel upon receiving the feedback braking signal such that the vehicle performs feedback braking. The auxiliary braking system (100) has a high braking response speed and achieves a short braking distance, thereby ensuring vehicle safety. Moreover, the auxiliary braking system has a simple structure and low costs.