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DC fast charging not as damaging to EV batteries as expected

As convenient as DC fast charging is, there have been lots of warnings that repeated dumping of so many electrons into an electric vehicle's battery pack in such a short time would reduce the battery's life. While everyone agrees that DC fast charging does have some effect on battery life, it may not be as bad as previously expected. Over on SimanaitisSays, Dennis Simanaitis, writes about a recent presentation by Matt Shirk of the Idaho National Laboratory (INL) called DC Fast, Wireless, And Conductive Charging Evaluation Projects (PDF) that describes an ongoing test of four 2012 Nissan Leaf EVs that are being charged in two pairs of two. One pair only recharges from 50-kW DC fast chargers, which the other two sip from 3.3-kW Level 2 chargers exclusively. Otherwise, the cars are operated pretty much the same: climate is automatically set to 72 degrees, are driven on public roads around Phoenix, AZ and have the same set of dedicated drivers is rotated through the four cars. "Degradation depends more on the miles traveled than on the nature of recharging." What's most interesting are the charts on page seven of Shirk's presentation (click the image above to enlarge), which show the energy capacity of each of the four vehicles. When they were new, the four batteries were each tested to measure their energy capacity and given a 0 capacity loss baseline. They were then tested at 10,000, 20,000, 30,000 and 40,000 miles, and at each point, the DC-only EVs had roughly the same amount of battery loss as the Level 2 test subjects. The DC cars did lose a bit more at each test, but only around a 25-percent overall loss after 40k, compared to 23 percent for the Level 2 cars. Simanaitis' takeaway is that, "INL data suggest that the amount of degradation depends more on the miles traveled than on the nature of recharging." The tests are part of the INLs' Advanced Vehicle Testing Activity work and a final report is forthcoming. These initial numbers from IPL do mesh with other research into DC fast charging, though. Mitsubishi said daily fast charging wouldn't really hurt the battery in the i-MiEV and MIT tests of a Fisker Karma battery showed just 10-percent loss over 1,500 rapid charge-discharge cycles.

Watch Nissan prank unsuspecting test drivers with GT Academy

Nissan's reality show/motorsports program, GT Academy, is set to return to Spike TV for its fourth season on Friday, and in anticipation, the Nismo team has issued a new video that gives some of its fans a taste of the racing lifestyle.
It all starts innocently enough, with fans test-driving a 2015 Nissan 370Z Nismo, only to have a sudden stop quickly transforms things into something a bit more exuberant and special. We won't spoil the details, so take a look at the video for yourself, and then head into Comments and let us know what you think.
GT Academy will air on Spike TV, Friday nights at 11:30 PM Eastern.

Nissan to present Vision Gran Turismo concept at Goodwood?

Power up your PlayStation and pop in any edition of Gran Turismo and you'll have hundreds of cars to choose from. But arguably few have managed to bridge the gap between that virtual world and reality than Nissan.
The Japanese automaker is the one responsible for putting the best gamers behind the wheel of actual race cars with its GT Academy, co-sponsored by Nissan and Gran Turismo. Yet while the likes of Mercedes-Benz, BMW, Volkswagen and Mitsubishi have already revealed their Vision Gran Turismo concepts specifically designed for the game, Nissan has been left behind. And as it is apt to point out in its latest infographic, that's not a position to which it's accustomed.
The graphic outlines all 148 Nissan vehicles you can drive in Gran Turismo, but leaves the last one under wraps, identified only by the date June 10, 2014. That's this Tuesday, when Nissan is hotly anticipated (thanks in no small part to the Tweet below from Nissan VP Andy Palmer) to reveal its own Vision Gran Turismo concept at the Goodwood Festival of Speed.