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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 Sway could see production

After unveiling the Sway concept at the 2015 Geneva Motor Show, Nissan was crystal clear that the showcar previewed the potentially bolder shape for a future compact hatchback. While it's likely a peek at the future Micra sold in other markets, not much is stopping similar styling from arriving to US showrooms, too. According to Nissan design boss Shiro Nakamura to Automotive News, the Sway was specifically designed to attract interest to visitors in Geneva. However, he believes that the shape could be attractive to buyers in other parts of the world. The showcar's styling blends elements from earlier Nissan concepts with the deeply V-shaped front end off the Lannia Concept and the floating roof from several others. The company isn't divulging a possible powertrain quite yet, though. Nissan is considering spinning the Versa Note off into its own product likely just called the Note, according to Automotive News. When it comes time for a new model around 2018, one way to really differentiate the newly independent vehicle might be to take on the Sway's much more radical styling. Related Video:

Nissan teases Sao Paolo CUV concept, production future likely

Back in 2012 at Brazil's São Paulo Motor Show, Nissan showed off an angular subcompact crossover concept, Extrem, that seemed to to portend the future of the Nissan Juke. Now, the Japanese automaker is teasing an as-yet-unnamed CUV concept for this year's show. The new showcar, set for an October 28 unveiling, is expected to be a closer-to-production version of the Extrem ethos.
Why should we care? Autoblog has reason to believe that this vehicle is under consideration for global distribution. The production Extrem - or whatever it ends up being called - is likely to be positioned size-wise in between the Juke and the recently upsized Rogue, offering more space and still-adventuresome styling, yet at a less expensive price. If accurate, that sounds like the production model will be a fair bit larger than the conceptual Xtrem, which was built atop a modified version of Nissan's V-platform, a model that underpins its March supermini (and speaking of the March, Nissan has also teased what looks to be a sporty concept version of it for the Brazilian show, too).
It's important to note that Nissan already has a bustling small CUV portfolio globally, what with its popular Qashqai / X-Trail models in markets beyond ours. There continues to be persistent rumors that Nissan is considering bringing over the Qashqai, as well, a model seemingly already quite close in size and execution to the Rogue. Despite this, Nissan has shown no hesitation in exploring every niche of the burgeoning CUV market, and while not every derivative has been a success, models like the Juke have rewarded the company's bravery with handsome sales.