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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 recalls 226k vehicles over airbag inflators

Nissan and Infiniti are the latest automakers to issue recalls involving faulty airbag inflators from Takata. The Japanese automakers have announced campaigns covering about 226,326 units from seven models built in the early 2000s because they contain the bad part in the passenger-side, front airbag. The affected vehicles include the 2002-2004 Nissan Sentra, 2002-2003 Pathfinder and 2002-2003 Maxima, and it also covers the 2002-2003 Infiniti QX4, 2002-2003 I35, 2003 FX45 and 2003 FX35.
Like the other vehicles with the faulty inflators, it's possible for the part to rupture during airbag deployment and spray metal shrapnel at occupants. Nissan and Infiniti have even included vehicles with replacement airbags in this campaign because those parts also could have been defective. Both companies were also part of the earlier regional campaign to fix cars in high-humidity climates where the problem has been found to be the worst.
As is the usual response, Nissan and Infiniti will notify owners of the affected vehicles and will make the repair at no charge. According to the filing with the National Highway Traffic Safety Administration, these fixes will commence around August 11. Scroll down to read the report from NHTSA, or read the full defect notice as a PDF, here.

Nissan GT-R convertible offered in three flavors from NCE

Newport Convertible Engineering, the Southern California company that can't keep its top on, has revealed on its website that it is now producing three different droptop versions of the Nissan GT-R Convertible. It's just another page in its work with high-end offerings like the new Range Rover and the Jaguar XJ. NCE owner Al Zadeh tells Autoblog that the superfast speedster came about during a trip to Abu Dhabi, when clients of his that collectively owned ten GT-Rs said they wanted him to engineer a convertible. They didn't want to see pictures, though, "They wanted to touch it and see it," he said.
So he built a convertible with a traditional, unadorned soft tonneau cover (the white one in our gallery) and another with hard tonneau cover fitted with roll hoops and a low-rise dual cowl (the blue one). When the clients saw it, "They said they wanted something more glamorous," Zadeh said. So he came up with the black version above with a hard tonneau cover and can't-miss-it cowling that, frankly, looks pretty good to us in that color and with those wheels.
Clients satisfied, the order books have opened for other GT-R owners around the world. The most restrained version runs $29,500 to build, the other two retail for $49,000, and all of them require a donor GT-R and eight weeks to finish. With facilities in SoCal, Europe and the Middle East, you won't even have to send your Godzilla too far away if this is the look you've decided it just has to have.