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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 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.

Renault to propose joint holding company with Nissan, Nikkei reports

TOKYO — Renault SA will propose to Nissan Motor Co a plan to create a joint holding company that would give both firms equal footing as the French automaker seeks further integration with its Japanese partner, the Nikkei newspaper reported on Friday. Under the proposal, both firms would nominate a nearly equal number of directors to the new company in which ordinary shares in both Nissan and Renault would be transferred on a balanced basis, the newspaper said, without citing sources. This would effectively dilute the stake held by the French government in Renault to around 7-8 percent, from its current 15 percent, it added. The new company would be headquartered in a third country, such as Singapore. Renault plans to make the proposal to Nissan soon, the Nikkei said, having modified an earlier merger idea that Nissan rejected on April 12. Nissan declined to comment on the issue. The Financial Times newspaper reported that both Nissan and the Japanese government have refused to engage in merger talks with Renault. The report of the proposal comes as the outlook for the alliance — one of the world's top automaking partnerships — has clouded since the arrest in November of its main architect, Carlos Ghosn, for suspected financial misconduct. It also comes as Nissan's financial performance struggles following years of focusing on volume sales over building its brand, particularly in the United States, its biggest market. Nissan slashes its forecast This week, the Japanese automaker slashed its profit forecast for the year just ended to its lowest in nearly a decade, citing weakness in its U.S. operations. Renault for years has been vying for a closer merger with Nissan, which it rescued from the brink of bankruptcy two decades ago. Ghosn had been working to achieve a deeper integration before his arrest on financial misconduct charges in November last year. While the automakers have been consolidating many of their operations over the past decade, including procurement and production, many executives at Nissan have opposed an all-out merger with Renault. Instead, Nissan has argued for a more equal footing with Renault, which holds a 43 percent stake in its bigger partner. Nissan holds a 15 percent stake in Renault. It was unclear whether Renault would hold the casting vote in major decisions at the new company, as it did in Renault-Nissan B.V., a strategic management company jointly held by both companies that oversaw operations for the partnership.