Electric automobile folio road surface braking energy recovery control method and system

The invention provides a method and a system for controlling split road surface braking energy recovery of an electric automobile. The method comprises the following steps: inputting the automobile speed v and the braking strength z into a braking force calculation module to obtain required braking force, the maximum braking torque of a motor, the peak torque of the motor and the SOC value of a power battery; determining the slip rate of each wheel, and inputting the slip rate of each wheel and the road adhesion coefficient of each wheel into a fuzzy controller according to the stress analysis of the vehicle during braking; obtaining the similarity between the current road surface and eight standard road surfaces according to a fuzzy controller, and calculating the peak adhesion coefficient between each current wheel and the road surface in combination with the standard road surface peak adhesion coefficient; and when the motor braking condition is met, a braking force distribution strategy is formulated and