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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.

1959 Cadillac Eldorado and more featured in latest 'Forza Horizon 4' car pack

It's that time again, time for another Forza Horizon 4 car pack. This one is a bit bittersweet, because while there are some great cars, it will also be the last one included with the Car Pass, which covered every downloadable car pack for a discounted price. So either we won't see many additional cars in the coming months, or we'll be paying extra for them. On a brighter note, the cars in this pack are cool, particularly the 1959 Cadillac Eldorado Biarritz convertible. Threading this aircraft carrier of a car through British streets should be highly entertaining. It's also stylish as all get-out. There are more appropriately sporty cars coming, too, including the 1994 Honda Prelude Si, 1994 Nissan Fairlady Z Version S Twin Turbo and the all-new TVR Griffith. Some reward cars being added come from the role-playing video game Final Fantasy XV. They're the Quartz Regalia Type F and Type D. The Type F is another big luxury convertible in the vein of the Cadillac, and the Type D is the monster truck version. The car pack is available now, and is free to owners of the $29.99 Car Pass. The individual car packs are available for $6.99 separately, and individual cars are even available for $2.99 a piece if you only want specific ones. Related Video: Image Credit: Turn10 Studios / Playground Games Toys/Games Cadillac Honda Nissan forza horizon 4

2013 Nissan GT-R and 2013 Alpina B6 mix it up on track and street

Here we have Autocar making an unforeseen comparison: the Nissan GT-R against the Alpina B6 at Brands Hatch and on public roads. Steve Sutcliffe clobbers the circuit in the 3,828-pound, all-wheel-drive sports car, then sees how well the 4,114-pound, rear-wheel drive grand tourer does against it.
Sutcliffe says there are quite a few similarities between the two cars, but that's really only on the spec sheet. The Nissan's got two turbos attached to its 3.8-liter V6, 542 horsepower and 465 pound-feet of torque. The Alpina's got two turbos attached to its 4.4-liter V8, 532 hp and 528 lb-ft. But one's brief is to be a monster on the track, the other on the boulevard, and if there's anything the video demonstrates, it's each car's focus.