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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 should kill the Quest and bring the Mitsubishi Delica D:5 to America

Enthusiasts don't have much reason to get excited about minivans. But if there were something cool to revitalize interest in the segment, I think American consumers would take notice. A quick browse through Mitsubishi's current catalog of global offerings turned up something interesting, and, now that Nissan has brought the diamond-star into its multi-headed global alliance, the Japanese automaker has a unique opportunity to throw caution to the wind and give America something fun. First, let's acknowledge that the Nissan Quest is a completely reasonable and current minivan entry. But it's not exactly a hot seller. The Quest was the seventh-best-selling minivan in the United States last month. The people-hauler's 209 sales in September of 2016 represent a 68-percent decline over the previous year. Granted, the Quest was trending upward for the year prior to last month's drop, but even the Quest's best full year of sales would just manage to match the number of Toyota Siennas or Chrysler Pacificas sold in a decent month. Put simply, the American market wouldn't miss the Nissan Quest if it were to disappear from dealership lots altogether. I don't think the Nissan Quest is a bad vehicle. The problem is that it's just like every other minivan sold in America. Nothing about the Quest stands out against its competitors, which basically makes it a redundant vehicle with no solid reason to exist. What Nissan really needs, in my humble opinion, is a minivan that stands out from the crowd. I offer the following solution: Bring the Mitsubishi Delica D:5 to the United States. Badge it as a Nissan to take advantage of that brand's larger dealer network; even call it the Quest Q:5 if you must. But don't change much else. I have a feeling Americans would show some interest in an eight-passenger, all-wheel-drive, multi-purpose vehicle like the Delica that's about the same overall length as the Nissan Rogue. As an added incentive to capture as many buyers as possible, offer both the 2.4-liter gasoline engine and the 2.2-liter four-cylinder turbodiesel that are available in other markets. Since the Delica D:5 is based on the same GS platform as the Dodge Journey, it could probably accommodate a Pentastar V6, too, but that doesn't really seem necessary. Instead of being a powerhouse, the Delica should be about fun and efficiency, with an adventurous off-road streak.

Nissan alters all CVTs to act less like a stretched rubberband

Among automotive enthusiasts, no one seems to hold a neutral opinion when it comes to continuously variable transmissions. CVTs are either praised for their ability to boost fuel economy or chided for their occasionally poor driving dynamics. Nissan is among the masters of these un-shifting gearboxes in the US, and it uses them in many vehicles in its lineup. However, for the 2015 model year, several models are getting a software update to make their CVTs a bit more like a conventional automatic.
To give drivers the option of feeling gearshifts while on the road, Nissan is adding its D-Step Shift Logic feature to the CVTs in multiple vehicles. Steve Powers, Nissan's senior manager of powertrain performance, told Autoblog the system forces the transmission to "hold a ratio and then shift" to simulate the way that a traditional automatic would. It's simply a change in software, but the company "can't do it to older CVTs," he said, because it would require changes to transmission logic, as well. According to Automotive News, the upgrade is coming to the 2015 Versa, Versa Note (pictured above), Sentra, V6-equipped Altima, Pathfinder and Quest. "We're rolling it out to all programs," said Powers.
Interestingly, buyer perception appears to be pushing the upgrade. John Curl, a Nissan North America regional product manager, told Automotive News that the decision to add the tech partially comes because some owners are bothered that the CVTs aren't changing gears. According to Powers, D-Step "avoids the rubber band feel," that many drivers didn't like. The different sensation of these transmissions seems like something consumers would notice during the test drive, or that the salesperson would inform them about. The same issue cropped up last year when the company was facing customer satisfaction problems among new buyers customers' unfamiliarity with the gearboxes.