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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 expands US EV test market for e-NV200 to Portland

Of course, it's going to be Portland. Oregon's largest city, known for its green-friendly vibe and policies, will be where Nissan will next test of its all-electric e-NV200 cargo van. And we hope those vans have cup holders for the inevitable java. The Japanese automaker is working with local utility company Portland General Electric (PGE) on a six-week trial program. Nissan and PGE will record data to better measure how the concept of battery-powered driving works within the local services network. The location makes sense, as Portland is one of the five best-selling US cities when it comes to sales of the Nissan Leaf, which shares its powertrain with the e-NV200. Nissan kicked off its "No Charge to Charge" free-charging program for new Leaf owners in April. Nissan, which had already been testing the e-NV200 with FedEx in Germany, Japan and Singapore as of late last year, said at the Washington Auto Show in January that it would start testing the electric van in the Washington, DC, area. Nissan said at the time that it helped install about 570 fast-charging CHAdeMO chargers throughout the US since last year, including 200 in December alone. Check out Nissan's press release about the Portland project below. LEADING EV MARKET PORTLAND BECOMES TEST BED FOR NISSAN E-NV200 ELECTRIC COMMERCIAL VEHICLE PORTLAND, Ore. – Portland, already a top breeding ground for electric vehicle (EV) sales, is now the proving ground for Nissan's prototype electric commercial vehicle – the Nissan e-NV200. Nissan is working in collaboration with Portland General Electric (PGE) on a six-week trial to help determine the viability of an electric commercial vehicle in the U.S market. PGE has assigned the e-NV200 into its fleet of vehicles with an underground crew, replacing a larger, diesel-powered van. "Oregon has been a top five market for Nissan LEAF sales in the U.S. due to proactive policies at the state level to encourage EV adoption, as well as robust charging infrastructure championed by the state and others like PGE," said Toby Perry, Nissan's director of EV Marketing in the U.S. "If we determine that e-NV200 fits into the U.S. commercial vehicle market, we expect that Portland would be a leading driver for sales as well." This year, Nissan is deploying two e-NV200 prototypes with companies such as PGE and FedEx in top U.S EV markets including California, Georgia, Oregon and Washington, D.C.

Nismo GT-R poised to be fastest Nissan ever

For almost every year since the Nissan GT-R first debuted, Nissan has been figuring out how to cram more power under the hood or give it 911-like quickness around the Nürburgring. Looking to create a brand image for its performance arm, we already knew that a hotter, Nismo-branded GT-R was in the works, but it seems some details may have leaked regarding this new Nismo GT-R.
While little has been spoken of this Super GT-R since February, Top Gear is reporting that Nismo is planning to make improvements to the coupe's power, handing and styling - three things that we're sure few have complained about since 2009. What could this mean for the GT-R? According to the article, Nismo could be looking to raise horsepower from the current 545-hp mark to more than 570 hp, and handling upgrades could give the car a 'Ring lap time of seven minutes and 22 seconds, which as Top Gear points out, is four seconds quicker than the new 911 GT3.