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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 Juke Nismo RS reveal confirmed by LA Auto Show

With the LA Auto Show a little more than a month away, we're getting a good idea of which cars we'll be seeing there. Show organizers have issued a press release that names numerous debuts we've heard about already, and one that caught our eye as brand new: the Nissan Juke Nismo RS.
We first heard about the Juke Nismo RS last year, and reported news of track-focused handling upgrades as well as a boost in power to the tune of 270 horsepower - an increase of 73 hp over a standard Juke. There is still no definitive word as to what else the will come with the Nismo RS package.
In addition to the Juke, we hear that the Nismo brand will also help unveil a new concept vehicle for Nissan on the LA stage.

Nissan bringing GT-R LM Nismo to Le Mans in 2015 [w/videos]

The Nissan Zeod RC hybrid racecar is certainly cool with its pointy looks, we're excited to see it run, but it isn't built to win races so much as push boundaries. But we might not have too to wait long for one of the Japanese brand's vehicles to claim an overall victory at the 24 Hours of Le Mans, as well. The company is announcing the GT-R LM Nismo racecar with a two-car, full factory effort in the top LMP1 class of the 2015 FIA World Endurance Championship, including Le Mans.
Details about the new racer are almost nonexistent at the moment. The only glimpses that we have are its silhouette under a sheet (above) and the briefest peek at its quad circular taillights in one of the teaser videos. However, the team is making some big promises about the car. "We want to win in a very different way to that of our rivals. We won't be turning up in a vehicle, which is a basically another hybrid that looks like another Porsche, Audi or Toyota - they all look the same to me," said Nissan's Chief Planning Officer and Executive Vice President Andy Palmer in the official announcement. Mechanically, Nissan is revealing even less about the GT-R LM Nismo for now. We are just going to have to wait and find out.
The brand will be aiming for a win in the 24-hour race, but it won't come easy. Nissan will absolutely face stiff competition from the combined forces of Audi, Porsche and Toyota in the top LMP1 class. Scroll down to watch two teaser videos for the newest member of the GT-R family and read the full announcement.