V2G Charging Stations

In the Vehicle-to-Grid (V2G) subproject, electric vehicles of different types and charging infrastructures with advanced charging and discharging concepts are integrated into the energy system of the LLEC. In such a system, electric vehicles can be used, for example, as buffer storage for energy that is temporarily not needed, e.g., when more electricity is generated by photovoltaics during periods of strong sunshine than is currently required. During periods of low energy, the batteries of the vehicles can be discharged again and thus contribute to the grid stability of the energy system. For the project, a dedicated charging infrastructure will be built on campus to enable V2G functionalities - i.e., the automatic and intelligent charging and discharging of vehicle batteries.

For this purpose, two charging stations, both consisting of a charging pole and a power cabinet, are connected to the high-performance battery system: One bidirectional charging column enables charging and discharging of vehicle batteries, with the energy being fed back into the grid during discharging. The second, unidirectional charging station is used to study variable loads on the uninterruptible power supply (UPS) side of the battery system during continuous charging operations.

Key figures

Bidirectional charging station

Unidirectional charging station

In addition, there is a bidirectional charging station for Honda e: