Bi-directional charging system for electric vehicles: A V2G concept for charging and discharging electric vehicles

The combination of “electric mobility” and “renewable energy production” heavily demands for energy storage systems. Investigations of technical possibilities to use electric vehicles (ev) and so called plug-in hybrid electric vehicles (phevs), containing a relevant amount of storage capacity, as storage systems are inalienable. Within the limits given by the car's battery management system consumption-driven charge and discharge signals could be used for effective integration in future V2G systems. This paper will give a detailed overview about a concept for bi-directional charging and first test results.