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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 Zeod RC crash test looks like crushing the tip on a pencil

Nissan has already showed us the 1.5-liter, three-cylinder engine 400 horsepower and 280 pound-feet of torque, augmented by an electric motor, that sits in back of the ZEOD RC headed for the 24 Hours of Le Mans. At the ZEOD RC's other end is a carbon fiber crash structure that has to be tested against an immovable object, and Nissan has seen fit to show us that, too.
You know what to expect if you've seen a crash test before, but the really pointy nose on this car reminds us of a Faber Castell HB pencil being sent to its death. Better yet, it's in slow motion, and you can watch it below.

Ghosn predicts autonomous cars on the roads by 2018, if laws allow

Things appear to be going well inside Nissan's autonomous vehicle development program. Until now, the automaker believed that self-driving cars would be ready for major markets like the US by 2020. However, Renault-Nissan CEO Carlos Ghosn is now speeding up that prediction to 2018 in some places, assuming that local laws are ready to accept the computer-controlled vehicles.
"The problem isn't technology, it's legislation, and the whole question of responsibility that goes with these cars moving around," said Ghosn in a speech in France recorded by Reuters. He predicted that the first sales could begin in France, Japan and the US by 2018 and expand elsewhere in 2020.
The alliance has been among the forefront of automakers working on self-driving cars. Nissan has an autonomous Leaf (pictured above) test car that is licensed to drive on Japanese roads. Renault showed off an version of its Zoe EV earlier this year called the Next Two, that could pilot itself at speeds up to 18 miles per hour, and that the company predicted would be ready by 2020.