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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 Titan Pro-4X, Hyundai Kona and Mitsubishi Outlander PHEV | Autoblog Podcast #621

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Consumer Editor Jeremy Korzeniewski and Senior Editor, Green, John Beltz Snyder. They talk about cars they've driven recently, including the 2020 Nissan Titan Pro-4X, Hyundai Kona and Mitsubishi Outlander PHEV. Then they talk news, starting with Volvo's new pick-up and drop-off service. Then they talk about Q1 U.S. sales figures. Lastly, they discuss the possibility of new styles of motorcycle from Harley-Davidson, including a flat-track bike and a cafe racer. Autoblog Podcast #621 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 Cars we're driving 2020 Nissan Titian Pro-4X 2020 Hyundai Kona Ultimate AWD 2020 Mitsubishi Outlander PHEV Volvo Valet U.S. car sales plummet Harley-Davidson cafe racer and flat track motorcycles Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Nissan didn't have much say in merger talks, but it had what FCA wanted

TOKYO — Nissan wasn't consulted on the proposed merger between its alliance partner Renault and Fiat Chrysler, but the Japanese automaker's reluctance to go along may have helped bring about the surprise collapse of the talks. While Nissan Motor Co. had a weaker bargaining position from the start, with its financial performance crumbling after the arrest last year of its star executive Carlos Ghosn, it still had as its crown jewel the technology of electric vehicles and hybrids that Fiat Chrysler wanted. The board of Renault, meeting Thursday, didn't get as far as voting on the proposal, announced last week, which would have created the world's third biggest automaker, trailing only Volkswagen AG of Germany and Japan's Toyota Motor Corp. When the French government, Renault's top shareholder with a 15% stake, asked for more time to convince Nissan, Fiat Chrysler Chairman John Elkann abruptly withdrew the offer. Although analysts say reviving the talks isn't out of the question, they say trust among the players appears to have been broken. "The other companies made the mistake of underestimating Nissan's determination to say, 'No,' " said Katsuya Takeuchi, senior analyst at Mitsubishi UFJ Morgan Stanley Securities in Tokyo. The Note, an electric car with a small gas engine to charge its battery, was Japan's No. 1 selling car, the first time in 50 years that a Nissan beat Toyota and Honda. Renault and Fiat Chrysler highlighted possible synergies that come from sharing parts and research costs as the benefits of the merger. But what Fiat Chrysler lacks and really wanted was what's called in the industry "electrification technology," Takeuchi said. With emissions regulations getting stricter around the world, having such technology is crucial. Yokohama-based Nissan makes the world's best-selling electric car Leaf. Its Note, an electric car equipped with a small gas engine to charge its battery, was Japan's No. 1 selling car for the fiscal year through March, the first time in 50 years that a Nissan model beat Toyota and Honda Motor Co. for that title. Nissan is also a leader in autonomous-driving technology, another area all the automakers are trying to innovate. "Although Nissan had no say, its cautionary stance on the merger ended up being very meaningful," Takeuchi said.