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Smart grid for electric vehicle fleet

(Nanowerk News) Being able to charge up to 30 electric cars at once requires some ingenious energy management. Researchers are incorporating a mix of renewables into the design of a smart grid for Germany’s largest charging station.

Up to 30 electric vehicles at a time can recharge in Fraunhofer IAO’s parking garage. (Image: Fraunhofer IAO)
The network of charging stations for electric vehicles is becoming more tightly meshed. In Germany, the ratio of electric cars to charging stations is currently two to one and utility companies are pushing forward expansion of charging opportunities, especially in cities and metropolitan areas. Over 2000 charging spots have already been installed nationwide and the country’s largest charging infrastructure is at the Fraunhofer Institute Center Stuttgart IZS – where up to 30 electric vehicles (EVs) at a time can recharge at AC charge spots in the Fraunhofer Campus parking garage. There is also one DC fast charging spot that has a charging capacity of up to 50 kilowatts and can fully charge a car’s battery in just 20 minutes. Up to 340 kilowatts of electricity are consumed when all charging spots are occupied – equivalent to around 20 percent of the load of the entire Institute Center, which has a staff of 1500.
More http://www.nanowerk.com/news2/green/newsid=34612.php

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