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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.

Feds Probe Nissan Cars For Unintended Acceleration

DETROIT (AP) - The U.S. government's road safety agency is investigating complaints that a trim panel can cause unwanted acceleration in Nissan Versa small cars. The probe covers about 360,000 Nissan Versa and Versa Note subcompacts from the 2012 through 2014 model years. The National Highway Traffic Safety Administration says in documents posted Saturday on its website that four drivers have complained that a trim panel near the gas pedal can trap the edge of a driver's shoe. This can stop the driver from releasing the gas pedal quickly and delay braking. There are no reports of crashes or injuries, although one driver complained of a close call at an intersection on June 9. As the driver accelerated to make a left turn, a plastic trim panel that covers the center console trapped the driver's shoe and stopped it from moving off the gas pedal, the complaint said. "I used my right hand to grab my leg and pulled harder, immediately braking hard, then backing my foot off the brake as I squealed and skidded around the corner, almost going over the curb and crashing," the driver wrote. The driver reported that the edge of the trim piece wasn't secured and trapped the sole of a leather work boot. Drivers who file complaints are not identified by NHTSA. Two of the four complaints were from drivers of rental cars, the agency said. A fifth complaint was filed in an unidentified foreign country, according to NHTSA. Investigations can lead to recalls but so far there are none in this case. Messages were left seeking comment Saturday from a Nissan spokesman. Related Gallery AOL Autos Test Drive: 2014 Nissan Versa Note Recalls Nissan unintended acceleration nissan versa nissan versa note

Nissan e-NV200 electric van will start FedEx testing in DC

The electric van test program that Nissan and FedEx announced today at the Washington Auto Show isn't really all that new. After all, FedEx is already testing the all-electric e-NV200 in Singapore, Japan and Germany. The news today is that FedEx will be one of the first companies to test the EV in the US, and Nissan brought a prototype to the show to gin up interest. 200 CHAdeMO stations were added in December, a monthly record. The e-NV200 uses a powertrain similar to what's in the Nissan Leaf and weighs about the same as that passenger car, but Nissan isn't talking about US performance figures quite yet. Nissan isn't even saying if the vehicle will even come to the US, but this test program sure hints that something like that is in the works. For now, all that's official is that Nissan will bring two - yes, just two - e-NV200 units to the US, letting FedEx test one in the Washington, DC area for between six to eight weeks before cycling the EVs to other companies in the US over the next year. The idea, as you may have guessed, it to gather data on how companies might use this van and let Nissan figure out if it wants to sell the e-NE200 here. The van will start being built in Barcelona, Spain this spring and is currently intended for Europe and Japan. FedEx is no stranger to greener vehicles, and has 167 EVs in its US fleet right now. Read more in the press release below. The e-NV200 can use CHAdeMO fast charging, and Nissan said today that it has helped install 570 of those DC fast chargers in the US since announcing expansion plans last year. At the time, the target was 500 chargers in 18 months, so things are progressing faster than publicly anticipated. In fact, 200 CHAdeMO stations were added in December, a monthly record. Jan. 22, 2014 Nissan and FedEx Express Put All-Electric e-NV200 to Work in Collaborative U.S. Test WASHINGTON, D.C. - FedEx Express, a subsidiary of FedEx Corp., and Nissan announced today at the Washington Auto Show that the two companies will begin testing the Nissan e-NV200, a 100 percent electric compact cargo vehicle, under real world conditions in Washington, D.C. This test marks the first time the vehicle will be running in North America. FedEx Express and Nissan have conducted similar e-NV200 tests with fleets in Japan, Singapore, the United Kingdom and Brazil. FedEx and Nissan are both committed to reducing the environmental impact of their operations worldwide.