System for recovery of regenerative braking energy of vehicle and method thereof

The invention discloses a system for recovery of regenerative braking energy of a vehicle and a method thereof. The vehicle comprises an on-board battery. The system comprises an energy recovery ratio adjusting device, a speed sensor, a battery management system and a whole vehicle controller, wherein the energy recovery ratio adjusting device is used for setting an energy recovery ratio; the speed sensor is used for detecting the current speed of a vehicle; the battery management system is used for determining the current carrying capacity of the onboard battery; and the whole vehicle controller is electrically connected with the energy recovery ratio adjusting device, the speed sensor and the battery management system, and is used for calculating the expected regenerative braking generation power according to the energy recovery ratio, the current speed and the current carrying capacity, and adjusting a motor according to the expected regenerative braking generation power, so that the difference between the actual regenerative braking generation power generated by the motor and the expected regenerative braking generation power is within a preset range. The invention can provide multiple choices for the driver, so that the driver can select different energy recovery ratios according to the driving habits, thereby not only ensuring the full recovery of energy, but also avoiding the loss of vehicle safety.