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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.

California to stop buying GM, Toyota and Fiat Chrysler vehicles over emissions fight

WASHINGTON — California said on Monday it will halt all purchases of new vehicles for state government fleets from GM, Toyota and Fiat Chrysler and other automakers backing President Donald Trump in a battle to strip the state of authority to regulate tailpipe emissions. Between 2016 and 2018, California purchased $58.6 million in vehicles from General Motors, $55.8 million from Fiat Chrysler Automobiles, $10.6 million from Toyota Motor and $9 million from Nissan. Last month, GM, Toyota, Fiat Chrysler and members of the Global Automakers trade association backed the Trump administration's effort to bar California from setting tailpipe standards, which are more rigid than Washington's proposed national standards. The automakers declined or did not immediately comment on California's announced ban on purchases of their vehicles. Starting in January, the state will only buy from automakers that recognize California's legal authority to set emissions standards. Those automakers include Ford, Honda, BMW AG and Volkswagen AG, which struck a deal with California in July to follow revised state vehicle emissions standards. "Car makers that have chosen to be on the wrong side of history will be on the losing end of CaliforniaÂ’s buying power," California Governor Gavin Newsom said in a statement. California purchased $69.2 million in vehicles from Ford over the three-year-period, $565,000 from Honda and none from the German automakers. The state also disclosed it will immediately no longer allow state agencies to buy sedans powered by an internal combustion engine, with exemptions for certain public safety vehicles. California's vehicle rules have been adopted by 13 other states. On Friday, California and 22 other U.S. states challenged the Trump administration's decision to revoke California's legal authority to set vehicle tailpipe emissions rules and require a rising number of zero emission vehicles (ZEV). The move follows a separate lawsuit filed in September by the states against the National Highway Traffic Safety Administration seeking to undo a parallel determination. In August 2018, the Trump administration proposed freezing fuel efficiency requirements at 2020 levels through 2026, reversing planned 5% annual increases. The Trump administrationÂ’s final requirements are expected in the coming months and are set to modestly boost fuel efficiency versus the initial proposal, with several automakers anticipating annual increases of about 1.5%.

Ghosn: Low oil prices won't hurt EVs much

Carlos Ghosn might be the most unflappable automotive CEO around. Despite lower gas prices and signs that these prices do impact green vehicle sales, the CEO of the Renault-Nissan Alliance was at the World Economic Forum in Davos, Switzerland this weekend saying that people will continue to buy electric vehicles. "I don't think it is going to be slowing down," he said. "The people who are buying mainly for economic reasons may be deterred from it, but you have plenty of consumers buying EV for other reasons. On top of this, even though the price of oil is unpredictable – nobody has predicted last year that we would be at this level of oil price today and nobody knows where oil price will be next year or two years down the road – but what is predictable is that the regulation on emissions is going to get tougher in the various markets where we are present. So, our EV strategy is here not only to face too much dependence on oil or the cost of oil, but also to allow us to meet the very stringent regulations on emissions that are happening and will be happening in the future. So I can bet you that more and more car makers are coming to EVs and they're going to continue to build and sell EVs, even though the price of oil is coming down." The bit about oil prices and electric vehicles starts at 1:35 into the video. News Source: Nissan via YouTube Green Nissan Renault Emissions Gas Prices Electric Videos oil prices