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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.

Nissan Leaf Aero Style wears new body kit in Japan

Here we have the Nissan Leaf Aero Style, which the automaker says "offers 100% electric vehicle performance in a new stylish and sporty shape." We call it a Nissan Leaf with a not-terribly-attractive body kit and two-tone wheels. Suffice it to say, it's not much like the conceptual version Nissan showed off at the Tokyo Motor Show back in 2011...
Our blunt assessment of the Leaf Aero Style doesn't necessarily mean it's bad, of course. It's still, best we can tell, a Nissan Leaf through and through, which means it has the same 107 horsepower, 187 pound-feet of torque and 24-kWh battery pack as every other new Leaf. That, in turn, means it has an official range of 75 miles (though you're probably better off assuming you can get 50 or so miles per charge in the real world) and a top speed of 90 miles per hour.
The Nissan Leaf Aero Style will go on sale in Japan in December of 2013, and there's no word on whether or not it will make its way to the States. There's also no official word on whether the Aero Style is actually any more aerodynamic than the standard Leaf, one of the slipperier cars on the market. If you want to read all about Nissan's presence in Tokyo, scroll down below. If you just want to see the new body kit and wheels, check out our high-res image gallery above.

Nissan, Mahindra may bond over EVs

Like Lloyd in Dumb & Dumber rejoicing that he's got a "one out of a million" chance with Mary Swanson, electric-vehicle advocates in India can do the same. That's because both local automaker Mahindra and Japan-based Nissan say they would consider working together to promote EVs in that country. Executives with Nissan and Mahindra, which makes the Reva e2o EV, independently told Autocar Professional that they would consider collaborating with the other company in order to speed up plug-in vehicle adoption in India. Nissan, which already works with companies such as Honda, Mitsubishi and Toyota to various degrees, said this collaboration would most likely revolve around electric-vehicle charging infrastructure advancements, a move that obviously helps all plug-in vehicles. Of course, nothing official has been announced. Last March, the Mahindra Reva e2o, which costs the equivalent of about $11,000, went on sale in India, with the company estimating at the time that it could manufacture 30,000 of the electric vehicles each year. In February, Mahindra debuted two electric cars at the New Delhi Auto Show, including the Mahindra Reva Halo EV concept sports car and the Mahindra Racing Formula E electric race car. The following month, India's Financial Express reported that Mahindra was targeting Sri Lanka and Norway for e2o sales. That car has a 62-mile single-charge range and a top speed of about 60 miles per hour. Featured Gallery Mahindra Reva E2O News Source: Autocar Professional via Cartrade.comImage Credit: Copyright 2014 Gisli Gislason Green Nissan Electric mahindra collaboration