Ok, so it isn't related to electric cars, but it's for airborne EVs, and face it, there isn't much else to talk about these days while we're waiting for Nissan or anybody else to come out with an affordable EV that's worth a damn.
http://greenbigtruck.com/2015/04/siemen ... -aircraft/
It seems like this kind of thing could pave the way for novel efficient aircraft designs. I'm picturing a four prop plane where two are turboprops and the other two are these jobs that are only used on takeoff and climb, then feathered at cruise. Or maybe all the props are on electric motors powered by microturbines, if there's any way that could be more efficient than driving the props through reduction gears.