Abstract:A high power non-vehicular charging system is designed in order to meet the demand of the electric vehicle fast charging. In this system, advanced digital control technology, electronics power switching and controlling technology, PWM control method and the PI algorithm combining parameter and integral separation are applied. And this system also concludes the components of various electric circuits of control, protection and communication to realize the intelligent charging function for electric vehicle. The experimental results indicate that the charging system can output high current and high voltage, so that it can meet the fast charging requirement of electric vehicle and play a key role in the popularity of electric vehicles.