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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.

Infiniti teases November debut of new QX55 crossover-coupe

Infiniti will officially unveil its new QX55 crossover-coupe via social media on Nov. 11, Nissan's luxury subsidiary announced early Wednesday. Infiniti is calling it a return to the segment which the company helped pioneer when it launched the FX crossover back in 2002.  "With a roofline and visual elements inspired by the iconic Infiniti FX, the QX55’s provocative design will fuse the stance and versatility of a premium midsize crossover with the sleek profile of a sports coupe," Infiniti's announcement said. "Beyond its provocative looks, the QX55 will also feature innovative technologies designed to empower, engage and connect luxury customers to the road ahead." The announcement was accompanied by the above teaser image, which depicts the QX55's tapered liftgate. It's quite a bit more conservative than the previously released design sketch suggested, but certainly looks the part.  The QX55 is one of five new vehicles Infiniti plans to launch in the next three years. It was first teased last August during Monterey Car Week. While Infiniti has been leaning heavily on the heritage of the original FX (which later became the QX70) since releasing that first design sketch, the QX55 will actually have little in common with its spiritual ancestor. While they may share fastback SUV looks, the QX55 will be based on the QX50 — a modern, front-wheel-drive crossover with small, efficient engines. The FX was derived from Infiniti's sport sedans and coupes, and even boasted a V8 option for much of its existence. Production of the new crossover-coupe was slated to begin in June, but was reportedly pushed back due to complications at its production facility in Aguascalientes, Mexico. The facility is a joint-venture project between Mercedes-Benz parent company Daimler and Nissan, and produces several other front- and all-wheel-drive vehicles for both companies.  Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.    

Nissan Sport Sedan Concept foretells a future Maxima

Nissan is in the midst of overhauling its design language. We got our first glimpse at the direction its style was going a year ago with the Resonance crossover concept, which was followed in Shanghai by the connected-car Friend-Me hatchback concept. And now, after dropping a few hints, Nissan has revealed the third in this developing series.
Unveiled at today's Detroit Auto Show, the new Sport Sedan Concept applies many of the same design elements we've seen on Nissan's previous show cars to a more conventional four-door shape. But far from a design exercise, the decidedly uncreatively named Sport Sedan Concept previews "a future production sports sedan," which has every indication of being the next Maxima.
Its dimensions reveal the concept to be bigger than the current Maxima in every direction but height, with that visual impression further entrenched by a floating roof design that combines with a high waistline to give a coupe-like profile. There are also sharp creases in the bodywork that visually break up the space between the rear set of 21-inch alloys and the tapered greenhouse. The shape is further punctuated by the V-shaped grille and distinctly Nissan boomerang-shaped lights that lend a face to this distinctly Japanese design that was penned in California and honed back in Japan. The sharp and simple cabin is characterized by a high-contrast palette with quilted leather and metallic trim.