At the turn of the year, Volkswagen is offering a glimpse of the company’s future mobile quick charging station.

It can be set up flexibly and independent of the power supply wherever it is needed: for example, in public parking lots in the city, on company premises, or as a temporary charging point at large-scale events. The mobile charging station works according to the principle of a power bank – which is familiar to many people with smartphones – but for electric vehicles instead. The charging capacity of up to 360 kWh enables up to 15 e-vehicles, including members of Volkswagen’s new ID. family,
to be charged in stand-alone operation. Thanks to quick charging technology, the charging process only takes 17 minutes on average. If the energy content of the integrated battery set is less than 20 percent, the depleted charging station is simply exchanged for a charged one. If, however, it is permanently attached to the power supply with up to 30 kW via alternating current, the battery pack perpetually recharges itself. In case the charging process is based on renewable power supply, the charging station furthermore allows the temporary storage of sustainably generated power, such as solar or wind energy – and therefore CO2-neutral mobility.

The first mobile quick charging stations will be set up as early as the first half of 2019 in Volkswagen’s hometown as part of a pilot project, and will support the expansion of a charging infrastructure in the urban area. As of 2020, the charging station will also be implemented in other cities and communities.

Each charging station enables DC quick charging with up to 100 kW. In addition to electric cars, e-bikes can also be charged. Up to four vehicles can be charged simultaneously: two with DC and two with AC connections. The total battery storage capacity of up to 360 kWh is sufficient for up to 15 e-vehicles. There is also the possibility of connecting to the power supply directly, allowing the station to be charged with up to 30 kW via alternating current by means of a permanent standard grid connection. This enables charging points for electric vehicles to be set up quickly, without any structural changes or major financial outlay. The battery pack in the charging station can be recharged around the clock thanks to the direct power connection. This time-independent recharging, and therefore buffering of power, also considerably reduces the strain on the power supply at peak periods.

“Our mobile charging stations offer a further crucial advantage,” says Mark Möller, Head of Technical Development at Volkswagen Group Components. “It is only when an electric car is charged with sustainably generated power that it can claim CO2-neutral mobility. Our charging station is the first to offer the possibility of temporarily storing sustainably generated power.” For example, the charging station can be charged specifically with solar or wind energy, which is then transmitted to the electric vehicles during charging. Technically, the mobile charging column is based on the battery pack of the Volkswagen Group’s Modular Electric Toolkit (MEB). On the one hand, this offers the advantage of quick scalability and, on the other hand, the charging station allows batteries from electric vehicles to have a second life. This is because a battery loses charging capacity over time. If a vehicle battery has a defined, reduced residual capacity, it is exchanged. If this battery subsequently passes a thorough analysis, it can be reused in a mobile charging station.

Other companies are also working on charging solutions that can be deployed quickly with battery packs.

Volvo recently invested in mobile electric car charging startup FreeWire and NIO is charging vehicles with electric vans equipped with additional battery packs.