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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 GT-R Nismo 'Ring time makes it track's 'fastest volume production car' [w/video]

Performance cars are fun to drive and all, but at the end of the day ,owners drop big bucks on what are often ridiculously unpractical vehicles for the bragging rights. And when it comes to ultimate bragging rights, few get more publicized than lap times for everyone's favorite stretch of German pavement, the Nürburgring. Enter the 2015 Nissan GT-R Nismo.
After rumors about a 7:08 lap time appeared yesterday, Nissan confirmed has confirmed the news today with video footage of the run, which took place on September 30. The official lap time is just seven minutes and 8.679 seconds, putting the GT-R Nismo about 11 seconds off the pace of the Porsche 918 Spyder - some six seconds quicker than the far costlier Lexus LFA. Some admitted - but hard-to-spot - missteps by Nissan driver Michael Krumm would indicate that the car actually left some time on the table.
With this time, Nissan claims that the 595-horsepower GT-R Nismo is the "fastest volume production car" around the track. The definition of "volume" could surely be contested here, though, considering the small numbers in which the GT-R is sold. While we don't have global GT-R sales figures, this year has only seen 1,063 units sold through October, and there were close to 1,300 sold in all of 2011 and about 1,200 in 2012. While this loosely defined claim will only add to the Nürburgring lap time squabbling, it is no less impressive. Check out the record run for yourself in the video below, which is accompanied by an official press release.

Nissan GT-R, Armada and the new Kia Sorento | Autoblog Podcast #658

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and Road Test Editor Zac Palmer for the final episode of 2020. They've been driving some interesting cars, including the Nissan GT-R, the new Nissan Armada, a Mercedes-Benz GLA and a pair of new-gen Kia Sorentos. They talk a bit about an interesting new EV called the Ace from Alpha Motor Corporation. Finally, the trio takes turns talking about their favorite cars they drove this year. Enjoy, and we'll be back with more episodes in 2021. Autoblog Podcast #658 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving:2021 Nissan GT-R 2021 Nissan Armada 2021 Mercedes-Benz GLA 2021 Kia Sorento Alpha Motor Corporation unveils Ace electric coupe Our favorite cars of the year: Zac: Lotus Evora GT John: Polestar 2 Greg: McLaren GT Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Green Podcasts Kia Lotus McLaren Mercedes-Benz Nissan Coupe Crossover SUV Electric Luxury Performance Sedan Polestar