With 40 percent of new Audi vehicles set to be electric by 2025, the manufacturer is working to develop integrated charging and storage options to link the national electric grid and the thousands of EVs on the road.
Their most recent innovation is a 1.9 MWh storage unit consisting of used lithium-ion batteries connected to the grid in Berlin. It is connected to Berlin’s medium-voltage power grid with one megawatt of power, which corresponds to the average charging requirement of around 200 electric cars. With its capacity of 1.9 MWh, the storage unit could supply the entire 5.5-hectare office and science campus where it is located with electricity independently for just under two hours.
Rapid-charging stations in the immediate vicinity, where electric cars can charge with up to 175 kW, are a further use case. To ensure that the high electricity requirement is covered in the most cost-efficient way possible and the local power grid is not put under excessive strain, the battery storage unit functions as a buffer here, too. Intelligent integration into the power grid allows the energy reservoir to absorb excess electricity from wind power and photovoltaic systems or the campus’s own combined heat and power plant.
The new storage banks are also a creating a way to reuse used batteries from electric cars. Since batteries retain the majority of their capacity after being used in cars this will conserve resources. In addition, Audi is developing concepts for an effective way to recycle batteries from used modules.