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Audi all-electric F12 “e Sport” prototype rolls out of e performance research project

•, By Darren Quick

Audi has unveiled the first vehicle to result from its three-year “e performance research project” that has just been concluded. Conducted in collaboration with Bosch and a number of institutes at the RWTH Aachen University, the project aimed to develop a scalable electric vehicle technology platform that would serve as the basis for a variety of electric-powered vehicles, from compact city cars to sedans to sports cars. Representing the “e Sport” technology platform, the F12 borrows its exterior styling from the V10-powered Audi R8, but underneath it's electric power all the way.

The performance prototype vehicle is powered by three separate electric motors, each of which can be controlled individually. A synchronous motor at the front axle is used at slow speeds, while the two performance-optimized asynchronous motors at the rear axle join the party at higher speeds to make the e Sport a fully electric quattro. Together, the three motors produce a total of 150 kW (204 hp) and 550 Nm (405.66 lb-ft) of torque.

The motors are powered by two separate battery blocks, each made up of 200 macrocells, which provide an overall capacity of over 38 kWh. A switchable high-voltage electrical system sees the two batteries delivering output voltages of 144 or 216 volts, with the required uniform system voltage provided by a DC/DC converter. To maximize efficiency, the voltage is kept to around 200 volts under normal driving conditions, stepping up to as much as 440 volts when the foot is put down. 

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