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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.

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

Japan court adds 10 more days to Ghosn's detention

A Japanese court on Sunday extended for 10 days the detention of ousted Nissan chairman Carlos Ghosn, who is facing new allegations of making the car maker shoulder $16.6 million in personal investment losses. The extension announced by the Tokyo District Court means Ghosn will remain in Tokyo's main detention center, where he has been confined since his arrest last month on initial allegations of financial misconduct. Ghosn was re-arrested on Friday based on suspicions that around October 2008 he shifted personal trades to Nissan to make it responsible for 1.85 billion yen ($16.6 million) in appraisal losses, prosecutors said. They said the move inflicted damage on Nissan by having it deposit a total of $14.7 million on four occasions between June 2009 and March 2012 into a related bank account. (Reporting by Daniel Leussink; editing by Darren Schuettler)Related Video: Government/Legal Hirings/Firings/Layoffs Nissan Renault