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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 unveils Altima-based V8 Supercars [w/videos]

Good as it is, when we think about the Nissan Altima, the words "V8" or "supercar" are not in our vernacular, but Nissan Motorsports is looking to change all that. After unveiling the race version of its Altima sedan intended for the Australian V8 Supercars series back in October, the four race teams and their cars were revealed yesterday ahead of a preseason test session this weekend.
Two of the Altima racecars will be sponsored by Jack Daniels while the other two will wear Norton (as in Norton Anti-Virus) black-and-yellow livery. The season officially kicks off on March 1, and we'll get to see the V8-powered Altima on US soil from May 17-19 when the V8 Supercars series hits the new Circuit of the Americas in Austin. Scroll down to watch a couple videos and a press release issued for the team introductions.

Robert Llewellyn fast-charges long-distance Leaf EV drive in UK

A British actor likely best known in his country for his role in the 1980s and 90s comedy series Red Dwarf has just made a pretty good case for driving green automobiles. Last week, Robert Llewellyn has completed an 862-mile round trip between London and Edinburgh in a Nissan Leaf and says he was able to save time by finding enough fast-charging stations the entire way, UK website Excite/Motoring says. Llewellyn, along with co-driver David Peilow, knocked out the London-to-Edinburgh leg in a single day, in part because of the British network of about 150 fast-charging stations. Llewellyn used his Twitter feed to update the general public of the two drivers' progress, noting that the first leg took about 13 hours. The round trip was completed January 26. Nissan can use all the positive publicity in can get, as UK sales of the all-electric vehicle failed to keep pace with the surging rate of demand in the US, where 2013 Leaf sales more than doubled from a year earlier to 22,610 units. In fact, in the UK, Nissan started offering incentives last month, things like free quick charging at Nissan dealerships, the ability to borrow gas-powered Nissans for free and free towing.