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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.

NHTSA probing whether to call Nissan to the carpet over Versa unintended acceleration

The Nissan Versa and Versa Note may have a carpeting problem that could make the little cars risky to drive. The National Highway Traffic Safety Administration is launching a preliminary evaluation into the 2012-2014 model year versions of the Versa, Versa Sedan and Versa Note, affecting an estimated 360,000 vehicle. In these vehicles, it's possible that the driver's foot could be caught where the carpet meets a trim panel near the accelerator. The regulator has four reported instances of the issue, but it's still collecting data from Nissan about any further cases.
According to the complaints, the tunnel carpet cover trim panel can possibly snag the drivers' right shoe where it meets the carpet, and can either keep their foot on the accelerator or prevent moving it to the brake pedal. In one case, the problem was bad enough that the driver had to free his foot using his hand, while driving. In two of the four reported cases, the vehicles were rental cars.
This is actually the second ongoing preliminary evaluation for some of these models. In late May, NHTSA started looking into the 2013-2014 Versa and 2014 Versa Note for long brake pedal travel.

Recharge Wrap-up: Nissan 'No Charge' in Denver, A123 doubles

Nissan has introduced its "No Charge To Charge" program in Denver, Colorado. As of June 2, customers who buy their new Nissan Leaf from certified dealers in the metro Denver area will get two years of free charging. Denver is the 16th market to offer "No Charge To Charge," with a total of at least 25 US markets scheduled to offer the program by the end of the year. "EV charging infrastructure continues to grow in Denver," says Nissan EV Sales and Marketing Director Andrew Speaker, "and access to free public charging for new Leaf buyers helps make owning an all-electric vehicle even more cost-effective and convenient." Read more in the press release below. Wanxiang is investing $200 million in A123 Systems in order to double its lithium-ion battery production. The combined capacity of its three production facilities in Michigan, Hangzhou, China and Changzhou, China will increase from 750 megawatt-hours to 1.5 gigawatt-hours in the next three years. The increased capacity will help support customers building hybrids, passenger EVs, and commercial vehicles. Included in the expansion is the capacity to build 12-volt starter batteries and 48-volt microhybrid systems. "It's been a tremendous turnaround," says A123 CEO Jason Forcier, referring to the company's 2012 bankruptcy. Forcier also says the company is already planning another expansion when this one is complete. Read more at Automotive News, and in the press release from A123. The Royal Hashemite Court of Jordan is ordering 150 Zoe EVs from Renault. King Abdullah II of Jordan signed an agreement with Renault, who will deliver the cars by the end of the year. The cars will be powered completely by solar energy generated on royal property. The order of the 150 Zoes is the largest since 2013, and makes Renault the largest provider for Jordan's royal EV fleet. Renault says that further EV orders are already being discussed. Read more in the press release from Renault-Nissan. Beijing, China will exempt electric vehicles from its limits to vehicles on roads during rush hour. Current policy, designed to help alleviate traffic and air pollution, restricts cars with even and odd license plates from rush hour traffic on alternating days. The exemption for EVs runs from June 1, 2015 until April 10, 2016. It is the newest in the list of perks meant to encourage EV adoption, despite the troublesome lack of charging infrastructure. Read more at Green Car Reports.