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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.

Deltawing takes out second ad targeting Nissan amidst design lawsuit

Don Panoz isn't a guy shy away from a fight. Since December, Panoz's Deltawing Technologies has been in a lawsuit with Nissan over alleged intellectual property violations with the design of the Zeod RC. The situation went public several weeks ago when Deltawing bought an ad in The Tennessean, a paper near Nissan's US headquarters, and the industry trade, Automotive News, aimed squarely at company CEO Carlos Ghosn.
Now, Deltawing is trying the tactic a second time with an even more scathing ad in The Tennessean on July 11 and in Automotive News on July 14 that calls the Zeod's design out directly. The bulletin puts the two racecars side by side and asks readers compare their similarities.
According to Deltawing spokesperson Gary Fong, the idea for these ads started after mediation between the company and Nissan broke down earlier this year. "We were trying to bring them to settle it amicably," he said to Autoblog. When that didn't happen, Deltawing wanted to fight the misconceptions in the public about the program and lawsuit. The strategy actually worked, too. "We've seen an opinion change," said Fong. He estimates that before the advertisements the attitude was "90 percent against Panoz," but there has been more support since them.

Nissan's Le Mans-bound ZEOD RC electric racecar nearing completion [w/video]

Nissan is working away on its ZEOD RC (Zero Emission On Demand Racing Car) which is still on pace for a Le Mans arrival in 2014. As of right now, the DeltaWing-shaped car's carbon-fiber tub and chassis have been completed. The next step will be installing the twin electric motors and fitting the seat of driver and GT Academy winner Lucas Ordóñez. If the current schedule sticks, the zero-emissions racer will hit a UK track for test laps in September.
But while those initial shakedown laps will be under full electric power, it's unclear whether the setup fielded in the UK will survive until Le Mans. Nissan itself says that it will be testing a number of "electrified" drivetrains ahead of the 2014 24 Hours of Le Mans, which is a significant departure from race car design - usually, the teams know what's powering their car before they start building it.
"Just developing a single powertrain option in only 12 months would be a mammoth task but we're looking to carefully examine a number of options to ascertain which will be best suited for Le Mans," said Darren Cox, Nissan's global motorsport director. Take a look below for a video and press release from Nissan documenting the ZEOD RC's build process.