Abstract: With the substantial increase in ownership of electric vehicles in the future, uncontrolled charge for the electric vehicles will have a significant impact on the power grid. The measures of orderly charge and discharge for the battery charging and swapping demonstration stations are introduced in Shandong province from such two aspects as vehicle to grid(V2G) system and the operations management system. In the V2G system, an intelligent bi-directional charge and discharge equipment is designed and the peak-valley price based control systems of charge and discharge and the station monitoring systems are developed. In the operations management system, the methods of battery echelon utilization and the life cycle management are proposed and the structures, working principles and technological means of both the metering and billing system and the fast battery switching system are introduced.

Key words: electric vehicle, vehicle to grid(V2G), operations management, orderly charge and discharge, battery charging and swapping station