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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 says talks with Renault focused on better competing in electric cars

TOKYO — Nissan's talks with Renault on revamping their alliance are focused on strengthening competitiveness as equal partners and getting the most from their investment in electric cars, the Japanese automaker's CEO told Reuters. The negotiations with Renault, Nissan's top shareholder, have less than two weeks remaining to meet a Nov. 15 target the companies had set to reach a deal, according to people with knowledge of the talks. Nissan Chief Executive Makoto Uchida declined to comment on whether an agreement could be reached this month. But he said he was talking with Renault CEO Luca de Meo every weekend and the talks would be "ongoing for the future." People familiar with the negotiations have said the sharing of technology had emerged as one sticking point. Uchida, who has spent much of his Nissan career in positions related to the Franco-Japanese alliance, emphasised that the talks were based on mutual trust. Each company had valuable technology and discussions of technology transfers were to be expected, he added. He said the goal was to improve the automakers' ability to compete at a time of economic uncertainty and as the industry pushes toward what he described as its biggest transformation in a century with the shift to electric vehicles. "The discussion we are having is about how to make our competitiveness even stronger," Uchida said in an interview with Reuters on Friday. "That's number one." His comments were his first to media since the automakers last month said they were discussing the future of their alliance. The partnership, which began with a 1999 investment from Renault and was long overseen by former executive-turned-fugitive Carlos Ghosn, was critical to turning around the Japanese automaker. But Nissan executives have over the years bristled over the unequal ownership structure, with Renault owning 43% of Nissan and the Japanese automaker holding only a 15% non-voting stake in Renault. People with knowledge of the talks have said the two sides have been discussing a reduction in Renault's stake, potentially to 15%, and the terms under which that could happen. "We want it to be an equal partnership," Uchida said, adding that an "equal partnership would make sense and that would speed up the collaboration even more." He did not comment on potential stake levels.

Recharge Wrap-up: Rimac Concept One vs. Bugatti Veyron, Tesla Autpoilot in the snow

Watch the Rimac Concept_One and the Bugatti Veyron drive head-to-head along the Croatian coast. Rimac Automobili founder Mate Rimac invited the Earl of Pembroke to drive his 1,088-horsepower EV, while he'd drive Lord Pembroke's Bugatti for comparison. Besides the scenic coastal roads shown in this first film, the pair also drove on a racetrack and an airfield. More episodes – and a drag race – are to come. Watch the video above, and read more at Teslarati. Watch how Tesla Autosteer operates in the snow at night, with no lane markings and no lead vehicle. While Tesla doesn't recommend using Autopilot in these conditions, it seems to manage rather well. Even thought the system shows that it doesn't always recognize the curb, the car doesn't instruct the driver to take control. It's possible that data plays a key role when there aren't other guiding factors on the road, and Tesla's high resolution mapping and the car's GPS could help navigate when there is little sensor input. See the video and read more at Electrek. Andromeda Power shows how a Nissan Leaf rescue car can charge a Tesla Model S. Andromeda Power uses its V2V Orca Inceptive onboard charger, which is meant for CHAdeMO to CHAdeMO charging. It requires a lot of equipment, including a CHAdeMO Tesla adapter, but it's definitely one way to feed a Tesla enough juice to get to the nearest charging station. Read more at Inside EVs. Hyundai increase the range of its Tucson Fuel Cell by 30 percent. The next generation of the hydrogen powered Hyundai is expected in early 2018, and range will jump from 265 miles on a full tank to 348 miles. That surpasses the Toyota Mirai's 312-mile range, but not the 366 miles of the Honda Clarity Fuel Cell. Read more at Green Car Reports, or from the Nikkei Asian Review. Related Gallery Rimac Automobili Concept_One View 35 Photos News Source: Electrek, YouTube: KmanAuto, Teslarati, YouTube: Wilton Classic & Supercar, Inside EVs, Green Car Reports, Nikkei Asian Review Green Bugatti Hyundai Automakers Nissan Tesla Green Automakers Autonomous Vehicles Electric Supercars Videos recharge wrapup