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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.

Carlos Ghosn takes a walk in a park, as lawyer apologizes for disguise

TOKYO — Former Nissan chairman Carlos Ghosn was seen walking in a Tokyo park on Friday, two days after his release in a strange disguise from a Japanese detention center. Ghosn, this time in sunglasses and a Stanford baseball cap (his daughter Caroline's alma mater), was spotted outdoors twice on Friday, strolling outside in the crisp March air. He and several others, believed to be his wife and daughters, visited a downtown Tokyo garden as members of the media trailed them and watched. The intense media attention was what led Ghosn's lawyers to suggest he leave the Tokyo Detention Center after his release on bail Wednesday in a laborer's outfit of cap, surgical mask and high-visibility vest, attorney Takashi Takano said. Many were baffled by the somewhat transparent disguise, which has riveted Japanese tabloid media. One TV show re-enacted his departure. Takano said in a blog post that he took full responsibility for what he called the "theater of disguise." He apologized for its failure. The outfit was confusing but didn't deter media from tracking the small van he traveled in after his release, in a spectacle broadcast live on television. "My immature plan, as a result, has tarnished the reputation that he has devoted his whole life to build," Takano said of his client. Takano asked the media to respect Ghosn's privacy. That plea appeared to go unheeded as cameramen closely followed the celebrity executive as those walking with him stared straight ahead in apparent annoyance. Ghosn, who headed the Renault-Nissan-Mitsubishi Motors alliance, has been charged with falsifying financial reports, under-reporting his income and breach of trust in having Nissan Motor Co. shoulder personal investment losses and make payments to a Saudi businessman. He says he is innocent and that the income allegedly under-reported was never paid or decided, that Nissan never suffered the investment losses and the payments were for legitimate services. In Japan, suspects are routinely kept in detention until preparations for their trials are ready, meaning they are often detained for months. The court rejected two earlier requests by Ghosn for bail. Ghosn led Nissan for two decades, saving the Yokohama-based automaker from near bankruptcy. He was arrested on Nov. 19.

Nissan-Renault mule teases mysterious subcompact

There's always something intriguing about a mystery, especially of the automotive kind, and that's exactly what we have here. Our spies recently spotted this Nissan-Renault test mule on the road in Southern Europe. But what, exactly, are they testing? From the front end, it's clear this mule started life as a Nissan Versa Note, but check it out in profile to see the cut down rear doors. They're significantly shorter than on the production car, and the wheelbase isn't as long here, either. The tacked on fender flares suggest a wider track than stock, too. Making things even more complicated is the bizarre cladding this subcompact hatch is wearing. The odd tumors on the hood and blistered side panels indicate that the automaker is trying to keep the design underneath a secret. Given Renault and Nissan's tight relationship, it also isn't clear which company is testing this model. While the body comes from the Note, this one is wearing French license plates. According to our spies, the vehicle was also spotted leaving a Renault testing location. There are some possibilities, though. Renault already has the new Twingo out, and the next-gen Megane has an imminent release. The French brand could now be at work on a future Clio. Alternatively, Nissan is reportedly using the Sway concept as inspiration for the upcoming Micra, and we could be getting a preview here. Give us your best guess in Comments. Related Video: