Audi is developing a concept to develop modular electric vehicle charging hubs incorporating second life batteries to reduce loads on the power grid. A pilot project, launching later in the year, will provide a practical test for a possible roll-out across Germany.
Each hub will comprise six self-contained charging “cubes”, each incorporating charging connections and storage batteries.
Audi says combined the batteries will offer 2.45 MWh of electricity, providing a charging output of up to 300 kW for each bay, but the whole assemblage will remain functional through a single 400-Volt hookup. Additional energy will be provided by solar panels on the roof.
Users will be able to book charging bays in advance and the system can accommodate both overnight charging at a relatively modest 11kW output or 300kW high power top up charging.
For instance, the hub will be able to provide enough energy to charge an Audi e-tron GT for up to 100 kilometres in about five minutes, and from nearly empty to 80 percent in just under 25 minutes under ideal conditions. The hubs will feature high end lounges for short stay users.
Audi says by leveraging recycled lithium-ion batteries and green energy generation, the modular concept provides flexibility and scalability while making it easier to select locations for the charging stations. The hub can be installed and adapted to the individual location quickly and independent of local network capacities.
Oliver Hoffmann, Audi’s Board Member for Technical Development says, “The charging hub embodies our aspiration for the electric era and highlights Audi’s commitment to Vorsprung durch Technik. A flexible high-performing charging park like this does not require much from the local electricity grid.”