Abstract:

A dual-energy-source regenerative braking-system simulation model was established to ensure
an electric light-truck recover braking-energy as much as possible within a best braking force distribution. A
dual energy source regenerative braking system was simulated to design an ideal braking force distribution of
regenerative braking control strategy. A light truck named Dongfeng EQ5030 was taken as the prototype with
a super capacitor being introduced into a pure electric-vehicle energy-storage-system to meet the demand
of energy and power for a pure electric vehicle light truck. An ideal braking force distribution of regenerative
braking control strategy was designed. A simulation model of regenerative braking system was established using
the Matlab/Sumilink software to simulate and contrast two different control strategies under typical road cycle.
The results show that the energy recovery rate increases by 37.33% than that of the traditional parallel control
strategy for the ideal braking force distribution of regenerative braking control strategy designed. It causes
electric cars increase travel distance.

Key words: pure electric vehicles, regenerative braking system, the super capacitor, double energy source, the ideal braking force control strategy