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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 freed from jail after four months

TOKYO — Wearing a mask, cap and what looked like a construction worker's outfit, the former chairman of Nissan Motor Co., Carlos Ghosn, left a Tokyo detention center Wednesday after posting 1 billion yen ($8.9 million) bail. Although his face was obscured as he left the facility, Ghosn's identity was apparent as he smiled after arriving at a building in downtown Tokyo, having removed his jacket, mask and hat. There was a scramble by media to follow Ghosn after he boarded a small Suzuki van, topped with a ladder, and traveled from the Tokyo Detention Center toward downtown. Motorcycles trailed the van in formation as it passed through city streets to one of the defense lawyer's offices. Ghosn later left in another car, which was mobbed by media. Ghosn, the former head of the Renault-Nissan-Mitsubishi Motors alliance was arrested on Nov. 19. He is charged with falsifying financial reports and with breach of trust. The Tokyo District Court confirmed the 1 billion yen ($8.9 million) bail was posted earlier in the day, after a judge rejected an appeal from prosecutors requesting his continued detention. That cleared the way for Ghosn to leave the facility after spending nearly four months since his arrest. Before his release, Ghosn, who turns 65 on Saturday, issued a statement reasserting his innocence. "I am innocent and totally committed to vigorously defending myself in a fair trial against these meritless and unsubstantiated accusations," he said. A date for his trial has not yet been set. Suspects in Japan often are detained for months, especially those who insist on their innocence, like Ghosn. Some legal experts, including Junichiro Hironaka, one of his lawyers, have criticized the system as "hostage justice," saying the long detentions tend to encourage false confessions. Ghosn's lawyer in France, Jean-Yves Le Borgne, said the lawyers in Japan will be leading the defense but he was in touch with them. "He is catching his breath and settling in," Le Borgne said of Ghosn. French Finance Minister Bruno Le Maire said a presumption of innocence for Ghosn was crucial, while noting the importance to France of the alliance between Nissan and French automaker Renault SA. "It is a good thing that Carlos Ghosn can defend himself freely and serenely, and his release will permit Carlos Ghosn to defend himself freely and serenely," he said. The French government owns about 15 percent of Renault SA, making it an influential voice in the future of the alliance.

Nissan reveals radical BladeGlider concept for Tokyo debut

Radical reinvention of the automobile doesn't happen very often. There's a reason they refer to it as "reinventing the wheel", after all. But that's what a team of racecar designers did with the original DeltaWing concept in 2010. Originally proposed as an IndyCar racer, the project was subsequently redesigned for Le Mans. That's when Nissan got on board, supported the project for a few races, then took the design in its own direction with the ZEOD RC. And now it's taking it to the road... via the auto show.
What we have here is the BladeGlider concept, a proposal for a delta-shaped electric sportscar which Nissan will present at the Tokyo Motor Show in a couple of weeks. Designed to focus on driving pleasure, the BladeGlider is about as radical as they come. Like the DeltaWing and ZEOD RC, it's got a narrow front track and wide rear to minimize drag and optimize stability, packing a 1+2 seating arrangement to put the driver front and center like in a McLaren F1, with upward-swinging doors and underbody aerodynamics to keep it glued to the road. In-wheel motors (of unspecified output) provide the power, a lightweight lithium-ion battery (not to mention the carbon-fiber bodywork) keeps it all fearther-like, and weight distribution is heavily biased towards the rear at 30:70.
A radical concept, to be sure, but here's the kicker: Nissan wants to build it. As you can see from the press release below, the BladeGlider "is both a proposal for the future direction of Nissan electric vehicle (EV) development and an exploratory prototype for an upcoming production vehicle". While it would undoubtedly take some time to develop, much less certify for road, seeing one of these - or even better, driving one - on our favorite stretches of tarmac strikes us as a prospect worth waiting for.