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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

You'll soon be able to buy an EV in China for just $8,000 after incentives

Renault is eventually looking to sell an electric vehicle in China that will cost as little as $8,000 after government incentives kick in. According to Reuters, Renault-Nissan chief Carlos Ghosn offered the prediction at the New York Times Energy for Tomorrow conference in Paris this week. Granted, China government incentives are approaching $20,000 per vehicle, as China looks to address its cities' notorious pollution problem, so there's some wiggle room with that price. And of course, the devil is in the details, and Ghosn didn't provide any. Still, such a low-priced EV would likely challenge the dominance of China-based EV makers BYD and Kandi. And the effort would likely be lucrative, given that it has been predicted that China will become the world's largest EV market by the end of the decade. In fact, the publication EV Sales said earlier this year that as many as 300,000 EVs will be sold in China in 2016 (by comparison, Americans bought about 100,000 EVs and plug-in hybrids combined through the first 10 months of the year). BYD is expected to sell 75,000 Tang SUV units this year. With such growth expectations in mind, automakers are focusing on China for potential EV development. Earlier this year, Volkswagen Group said it signed a memorandum of understanding with China's Jianghuai Automobile (JAC) for plug-in vehicle production. Mercedes-Benz parent Daimler also stated its goal to broaden plug-in vehicle sales in China. Renault appears to be trying to make an early mark in China. Dongfeng Renault Automobile Co., the Chinese joint venture between Renault and Donfeng, is looking to start testing a self-driving electric vehicle this month. Dongfeng Renault will use a 1.5-mile stretch of road in Beijing's Caidian district for testing purposes. Related Video: