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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 could offer plug-in hybrids by 2016

Nissan is recharging the idea of a production plug-in hybrid model. The Japanese automaker may start making a plug-in hybrid by as soon as late 2015, with deliveries to start in time for the 2016 model year, Green Car Reports says, citing an interview with company executive Andy Palmer. Those comments go against what Nissan said during the North American Auto Show in January. Palmer didn't specify what class of vehicle the plug-in hybrid would be, but he said battery-electric vehicles are best suited for cars 3,850 pounds or lighter, according to Green Car Reports. That would imply that the plug-in hybrid powertrain may be used for a mid-sized sedan or a crossover vehicle. Either way, a Nissan PHEV may pair the Nissan Leaf's 108-horsepower electric motor with a gas engine. Whether Palmer's projected timeframe was more of a ballpark estimate is anyone's guess, as the company hasn't made official plans for a 2016 model-year plug-in hybrid, Nissan spokesman Tim Gallagher wrote in an e-mail to AutoblogGreen. Either way, feel free to join us in the comments below. Nissan is coming off its best-ever sale month for the Leaf, which has moved about 115,000 units around the world. Domestic sales of the Leaf in May rose 46 percent from a year earlier to a monthly record 3,117 vehicles. Through the first five months of the year, Leaf sales increased 36 percent, to 10,389 units.

Updated Nissan Micra gets fresh look, more tech and 'New' name

A few months ago, Nissan gave the Micra (which is not for US consumption) a substantial styling update that included new front and rear fascias, and stuffed more technology into the interior, such as USB ports and auxiliary inputs for audio and a new media touchscreen. Though it's still based on the same fourth-generation architecture, Nissan now calls it the New Micra.
Overall the New Micra - also known as March in some markets - looks similar to but more taut than the vehicle that launched in late 2010, thanks to more angular headlights, a new bumper, a sculpted hood and a revised grille with the Nissan logo sitting inside a chrome V, which establishes a stronger link to Nissan's "corporate look." The rear end receives less-drastic changes, such as a new bumper, LED taillamps and a new infill panel at the bottom of the tailgate.
For all of the details on Nissan's five-door city car, take a look at the press release below, and be sure to check out our live gallery from Frankfurt.