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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.

Automakers Renault, Nissan will become equals, with equal stakes in each other

TOKYO — Nissan and Renault have agreed to equalize the stakes they hold in each other, both sides said Monday, ironing out a source of conflict in the Japan-French auto alliance. Up to now, Renault Group has held a 43.4% stake in Nissan Motor Co., potentially giving it a larger say in how the Japanese automaker is run. It will transfer shares equivalent to a 28.4% stake to a French trust so each side will hold the same 15% stake in the other, according to the companies. The disparity between the holdings was a cause of friction, especially after Nissan became far more profitable than Renault. The agreement on the change is still being finalized and needs board approval from both companies. The companies said the shares in the French trust can eventually be sold but did not say to whom or how. They said the sale will be carried out in a “coordinated and orderly process” if a deal makes commercial sense to Renault Group, and that there is no time deadline. Until then, the voting rights would be “neutralized” for most managerial decisions, but the economic rights, such as dividends, will continue to go to Renault, the companies said. The top shareholder in Renault is the French government. Japanese Prime Minister Fumio Kishida met with French President Emmanuel Macron earlier this month. The alliance has had its ups and downs since it began in 1999, when Renault sent one of its executives, Carlos Ghosn, to then-struggling Nissan to lead a turnaround. Ghosn first served as Nissan's chief executive and later its chairman before he was arrested in late 2018 on various financial misconduct charges. The alliance, which also includes smaller Japanese automaker Mitsubishi Motor Corp. and remains one of the world's top auto groups, has been eager to put the Ghosn scandal behind it. Allegations against Ghosn include underreporting income, using investment funds for personal gain and illicit use of company expenses, including overseas homes and a yacht. Ghosn said he is innocent of all charges. He jumped bail in late 2019 and is now in Lebanon, which has no extradition treaty with Japan. The equalization of the crossholdings has been speculated about for some time. The companies called the move “an important milestone.” “The ambition is to strengthen the ties of the alliance and maximize value creation for all stakeholders,” said Nissan, based in the port city of Yokohama.

Nissan reveals updated 2015 370Z Nismo among the faithful

Well before quick Honda Si models of the '80s or the performance juggernaut that the Toyota Supra and Mazda RX-7 became in the 90s, the Datsun 240Z was an early stake in the ground for Japanese sports cars. It was affordable, but the original Z-car was also a capable coupe that could show its tail to European and American rivals. Today, Nissan celebrates the car each year with fellow enthusiasts at its ZDAYZ event, and this year in North Carolina, it's surprising fans by launching the 2015 370Z Nismo there with some significant upgrades.
The biggest change is that the 370Z Nismo is available with a seven-speed automatic transmission for the first time. The six-speed manual is still standard, of course. But for those who don't want to use a clutch, Nissan is offering the new automatic with Downshift Rev Matching and a manual mode via paddle shifters. Power is still provided by the same 3.7-liter V6 as last year, producing 350 horsepower and 276 pound-feet of torque with a limited-slip differential at the back for added traction.
This hottest 370Z model also receives a brand-new GT-R-inspired bodykit that features a deeper front fascia, LED running lights and blacked-out headlight bezels. It also sports a new chin spoiler bearing the Nismo emblem and red accents that flow from the front, down the side sills and all the way to the rear bumper. At the back, there is also a smaller ducktail spoiler for a more mature look. The 2015 also wears cool 19-inch forged aluminum wheels by Rays with a new twin-spoke design and charcoal finish. Compared to last year's model, it's a much more mature-looking coupe.