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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.

2013 Nissan Pathfinder: Wrap-Up [w/video]

Despite our tendency as enthusiasts to clamor for things like wagons and hot hatchbacks, it's hard to argue with the buying public's increasing demand for functional crossovers. In fact, the great SUV craze of the late-1990s has all but faded in favor of the easier-driving, better-packaged, more-efficient crossover. That's even true at the larger end of the market - just look at what happened when Ford redesigned its body-on-frame Explorer into a stylish and well-equipped CUV. And now look at the similar success Nissan has had in repurposing its rugged Pathfinder sport-ute as an appealing crossover.
But happily, we report the following line: out of every long-term vehicle Autoblog has ever tested, not a single one has been as in-demand as the 2013 Pathfinder Platinum you see here. After 13 months of solid use, we added 24,372 miles to the Pfinder's odometer - and that's without the vehicle ever leaving the hands of our Detroit-based team (sorry, West Coasters).
There's good reason for that high-demand usage, too. After spending a little over a year with our Mocha Stone tester (a color that earned this Nissan the nickname "Sweet Brown") we came to appreciate its vast versatility, comfort, all-weather prowess, and the way it absolutely ate up the miles on long trips. We drove it all over the United States, in all four seasons, filling it with our families, friends, and occasionally using its capacious cabin for sleeping on the road. Through good and bad, the Pathfinder was a trusty friend. But like any good friendship, that wasn't without a couple of fights.

Renault to Nissan: Stop trying to contact our board members

TOKYO/PARIS — Renault told alliance partner Nissan to stop contacting the French company's directors ahead of a Thursday board meeting as the Japanese automaker tried to share evidence of wrongdoing by its ousted chairman, Carlos Ghosn, two sources said. Ever since Ghosn's Nov. 19 arrest in Japan, Renault and the French government, the automaker's biggest shareholder, have demanded to see the findings of a Nissan internal investigation that include allegations of financial misconduct by the 64-year-old executive. Ghosn was charged on Monday in Japan for failing to declare deferred income he had agreed to receive for the five years ending March 2015. While Nissan fired him as chairman days after his arrest, he remains chairman and CEO of its French partner. Renault's board meets on Dec. 13, and the findings of Nissan's investigation will be shared at the meeting where Ghosn's future could be also debated, one of the sources with knowledge of the matter said. The French firm told Nissan not to contact its directors ahead of the meeting, because such contact was outside the agreed channels for communication of the sensitive findings, the source said. Nissan offered last week to brief Renault's board about findings on what it considers proof of wrongdoing by Ghosn, said a second source who has knowledge of the matter but declined to be identified as it was confidential. But Renault advised Nissan to brief its lawyers instead, which led to a meeting between the Japanese firm's officials and Renault's legal teams early this week in Paris, the person said. The Japanese automaker later invited Thierry Bollore, who was named Renault's deputy CEO with the same powers as Ghosn a day after his arrest, as well as board members, to examine the contents of the findings, said the source. Bollore, though, told Nissan on Tuesday to "refrain from contacting the board," the source said. The exchange between Renault and Nissan is another example of the testy relationship between the two automakers, despite assurances by executives on both sides to preserve the alliance. The alliance, of which Ghosn has been the driving force, is widely seen as vital for the members' long-term survival. Board members invited to see the evidence included Martin Vial, who heads the French state shareholdings agency, interim Chairman Philippe Lagayette and independent director Patrick Thomas, the second source said. A Renault spokesperson declined to comment.