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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 Leaf hits 3,000 sales in July, Chevy Volt climbs over 2,000

It was a good sales month for both the Nissan Leaf and the Chevy Volt, with the two 'elder statesman' plug-in vehicles reaching numerical milestones in July. The Leaf sold 3,019 units and the Volt crossed the 2,000 sales level for the first time in 2014, hitting 2,020 sales. With Tesla also announcing it is delivering around 2,500 Model S EVs a month (but that's globally, compared to the US-only numbers for the Volt and Leaf we're talking about here) and Ford's plug-in vehicles selling well, we are certainly in a golden moment for EV sales. The Volt was a bright spot for the Bowtie brand last month. For the Volt, the 2,020 units sold represents a 13 percent increase from July of 2013 even thought year-to-date sales are down 8.7 percent this year compared to last year. Overall, total Chevrolet deliveries for July 2014 were up eight percent compared to 2013, so the Volt was a bright spot for the Bowtie brand last month. On the Leaf front, this is only the second time that the EV has sold more than 3,000 units in a month (the other being in May of this year). The year-over-year increase for the Leaf was 62 percent in July and represents the 17th straight month of record sales, as Nissan is more than happy to report each month. Overall, Leaf sales are up 34.6 percent, year-to-date, and Nissan's director of Leaf sales and infrastructure, Brendan Jones, said in a statement that a free public charging incentive was responsible. "Since we launched the No Charge to Charge promotion in the first 10 markets, we've seen a surge in Leaf sales in those areas. Leaf sales in the northeastern US are also picking up with new tax incentives for Massachusetts and Maryland residents." With No Charge To Charge set to expand to 25 markets over the next year, we expect Leaf sales to continue to grow. We will have our monthly look at all green car sales available soon, so stay tuned. Green Chevrolet Nissan Electric PHEV ev sales

Infiniti QX60 Monograph previews a handsome next-gen three-row crossover

Infiniti has pulled the sheet off its QX60 Monograph — a styling exercise meant to preview the forthcoming production replacement for its three-row crossover. Infiniti insists that while this is not the production QX60 replacement, it is close enough to not merely be labeled a "concept." Whatever Infiniti wants to call it, it's impressive. This slick design blends elements of the original Infiniti FX line with some of the luxury brand's more recent artistic direction (see: the big, fat grille) and perhaps a little dose of European flavor; we'd be lying if we said there wasn't some Jaguar F-Pace evident in that profile.  "More than a design study or concept, a 'Monograph' provides a tangible insight into how Infiniti plans to transform a future model. The QX60 Monograph previews some of the proportions and design elements that will adorn the brandÂ’s future three-row SUV, " Infiniti said in the QX60's official announcement. "We commenced the design of the Monograph knowing this was an opportune time to start a discussion about where we are planning to take the QX60 in the future," said Alfonso Albaisa, senior vice president, Global Design, Nissan Motor Co. Ltd.  "In crafting this Monograph, we wanted to change the tonality of the QX60 and transform the nameplate from a sculptural and architectural point of view. We raised the visual center of gravity, giving it a strong, straight shoulder line that carries through to the hood, with a higher, more prominent grille, and longer-looking cabin to deliver a sense of muscularity and a commanding presence," Albaisa said. Every element of the QX60 Monograph's exterior was designed deliberately to convey that image, from the heat-sink-inspired shape of the headlamps to the slick, well-integrated segments of the rear lighting signature, which blends into a single wrap-around element when not illuminated.  As close to production-ready as this QX60 Monograph might be, there are some obvious signs that there's still work yet to be done. As you'll note, there's not a single shot of this crossover's interior, and that's because it doesn't have one yet. Infiniti knows it can't afford to fumble a new launch, especially of a crossover, so we have fairly high expectations for its cabin, especially since Infiniti has been known to produce some top-notch interiors when it tries. Look for the real-deal next-generation QX60 to be shown sometime in 2021.