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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.

Auto News Recap For 5.13.16 | Autoblog Minute

Senior Editor Greg Migliore recaps the week in automotive news, including a look at Hyperloop One's desert propulsion test, Chrysler 300 rumors, and Nissan's purchase of Mitsubishi. Chrysler Mitsubishi Nissan Autoblog Minute Videos Original Video hyperloop

Watch this 800-hp Nissan Juke-R savage the 'Ring

The concept of the 545-horsepower Nissan Juke-R that stuffs the drivetrain of a GT-R into a subcompact crossover is already insane, but Russian company Shpilli Villi Engineering has taken things even further with their own crazy riff on the idea. Its version tunes the engine up to a claimed 800 horsepower, plus a shot of nitrous for an extra 200 hp to put it (way) over the top. Naturally, a number of other upgrades have been exacted in an effort to try and keep the custom Juke's shiny side up and the driveline internals from spontaneously rearranging themselves. Those changes include a beefed-up switchable all-wheel drive or rear-wheel drive layout and revised suspension.
Last year, you may recall that we saw an earlier version of Shpilli Villi Engineering's insanity testing with a mere 700 hp in a one-mile, standing drag race against a Bugatti Veyron. In that state of tune, the Juke-R lost, but by less than a hundredth of a second. Now, owner and racer Vladimir Ulanov has brought his madness to the Nürburgring Nordschleife to see how it does around a damp lap of the famous track.
It looks like 800 hp and a moist track might be almost too much for this Juke to handle, because Ulanov gets very loose at several points during the lap. Understandably, his passenger seems suitably impressed and possibly a little freaked out at the end. See what you think of this craziness by watching the video.