Brake energy recovery system and method based on adaptive cruise control system

The invention provides a brake energy recovery system and method based on an adaptive cruise control system. The brake energy recovery system comprises the adaptive cruise control system, a vehicle distance sensor, an anti-lock brake system, a vehicle control unit, a motor controller and a driving motor, the vehicle distance sensor and the anti-lock brake system are connected with the vehicle control unit to transmit a signal of the distance between a current vehicle and a preceding vehicle and a current wheel speed signal to the vehicle control unit, the adaptive cruise control system is connected with the vehicle control unit, the adaptive cruise control system adjusts the distance between the current vehicle and the preceding vehicle according to the vehicle distance signal and the wheel speed signal, and the vehicle control unit is connected with the driving motor through the motor controller. A control method is based on the vehicle-mounted adaptive cruise control system. When a vehicle cruise decelerates automatically, electric energy is recycled through motor brake preferentially, and economic performance of the vehicle is improved.