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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 tests 'self-cleaning' paint on Leaf models in Europe

Once upon a time, self-cleaning ovens were all the rage. Now, Nissan thinks the concept may apply to its vehicles. And the Japanese vehicle maker is testing it out on some of its Leaf battery-electric vehicles Europe, no less. Nissan says its trying out what's called a "superhydrophobic and oleophobic" paint on Leaf battery-electric vehicles for testing and demonstration purposes. The paint, produced by UltraTech International Inc., is designed to repel splats of liquid such as oil or standing water away from the car's surface. The paint, called Ultra-Ever Dry, does this by creating what Nissan says is a layer of air around the vehicle surface. We imagine there's a detailed chemical explanation for this phenomenon that would better explain this process, but that's the best way we can explain it. Right now, Nissan is pitching the product testing as a way to further the Leaf's reputation as what the automaker calls "the world's cleanest car." That said, the paint hasn't been tested in North America, and no plans have been made to add the feature as either a standard or optional goodie for the battery-electric vehicle. Still, go ahead and check out Nissan's press release on the magic paint below. Nissan Creates "World's Cleanest Car" – a Zero Emissions Nissan LEAF with Self-Cleaning Nano-Paint Technology For LEAF owners who never qualify for gas stations' "Free Car Wash with Purchase" offers, this technical study might be the perfect solution July 09, 2014 10:00 AM Eastern Daylight Time NASHVILLE, Tenn.--(BUSINESS WIRE)--What do you get when you combine the world's best-selling zero emission vehicle with innovative paint technology that repels mud, rain and everyday dirt? Answer: A very special Nissan LEAF electric vehicle that might just be the "world's cleanest car." "No matter what the road throws at this LEAF, its Ultra-Ever Dry® exterior coating will throw right back" Created to demonstrate its potential use in future production vehicles, this Nissan LEAF's exterior was treated with a specially engineered superhydrophobic and oleophobic paint that is designed to repel water and oils. The "self-cleaning" paint, called Ultra-Ever Dry®, creates a protective layer of air between the paint and environment, effectively stopping standing water and road spray from creating dirty marks on the LEAF's surface. Nissan is one of the first carmakers to apply this technology to a vehicle.

Driving the Maserati MC20 and BMW i7 | Autoblog Podcast #802

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and Road Test Editor Zac Palmer. They're amped up about the BMW i7 and Maserati MC 20 they've all been driving. They also opine about the BMW M3 CS and 2024 Ford Mustang. The Japan Mobility Show (formerly Tokyo Motor Show) is coming up, and there have been some interesting reveals and teasers, including the Nissan Hyper Urban and Hyper Adventure concepts, some neat kei car concepts from Daihatsu, a Miata-inspired EV concept from Mazda and an electric sports coupe concept from Subaru. Finally, they discuss the wild situation surround last weekend's Formula 1 Qatar Grand Prix. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #802 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving 2023 BMW i7 2023 Maserati MC20 2024 BMW M3 CS 2024 Ford Mustang GT Japan Mobility Show preview Nissan Hyper Urban and Hyper Adventure concepts Daihatsu kei car concepts Possible next-gen Mazda Miata Subaru electric sports car Formula 1 Qatar Grand Prix recap Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: Green Motorsports Podcasts Tokyo Motor Show BMW Ford Maserati Mazda Nissan Subaru