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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 Pathfinder, Infiniti JX in transmission safety probe

Nissan may be forced to recall 110,000 Pathfinder and Infiniti JX35 crossovers, due to a number of customer complaints. Consumers report suddenly losing power, with repair facilities blaming the issue on faulty transmission cooler line connections. Both the Pathfinder and JX35 use a continuously variable transmission. As of right now, the only vehicles being investigated are from model year 2013.
Nissan has been cooperating with the National Highway Traffic Safety Administration, according to a report from Reuters, and it has developed a fix for the affected vehicles. It's not clear whether this will develop into a full-blown recall, as there have been no known cases of injuries or crashes. But with a potential 110,000 vehicles prone to sudden power loss, a recall seems to be a likely outcome.

New world record set with 507 EVs in parade [w/video] *UPDATE

Let's be honest, with more and more electric vehicles out in the world, it's getting easier to bring more and more of them together in one spot. Still, the work that goes into convincing over 500 EV owners to show up at one place at one time should be rewarded. And, in the case of the San Francisco Bay Leafs and Electric Auto Association Silicon Valley Chapter efforts yesterday as part of this year's National Drive Electric Week celebrations in in Cupertino, CA, the reward is a new Guinness World Record for the most electric vehicles in a parade. The number? 507 pure EVs gathered (sorry, plug-in hybrids). Recent similar records were set with now-small-looking events that had 305 cars or 431 EVs. The most recent target that the groups were trying to beat was a record originally set at the WAVE rally in Stuttgart, Germany earlier this year, where organizers also claimed to have 507 EVs. Plug In America (PIA) now says that the Stuttgart number was actually 481, giving California a 26-vehicle lead. The most unusual EV at the event was Stella, the solar-powered EV that is touring the world. PIA says that this four-person EV "can produce twice as much energy as it needs in a day," so it should feel right at home in the Golden State. *UPDATE: A previous version of this article said that the parade was organized directly by PIA. We have corrected the error. We've also added a video from Nissan about the parade below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. NEW GUINNESS WORLD RECORD FOR NUMBER OF EVS IN A PARADE SET TODAY DURING NATIONAL DRIVE ELECTRIC WEEK IN CUPERTINO World Record set with 507 EVs, beating previous record by 26 CUPERTINO, Calif., Sept. 20, 2014-Philip Robertson, a judge with GUINNESS WORLD RECORDS®, today pronounced a new world record for most electric vehicles in a parade: 507. The record-breaking EV procession took place at the National Drive Electric Week event in Cupertino, Calif. Every vehicle was zero-emission, all-electric. No hybrid-electrics were allowed. 399 Panoramic view taken by Bruce Southwick. Stuttgart, Germany held the previous world record for a 481-EV parade in May 2014. "Congratulations on helping to drive the future of automotive technology," Robertson said upon presenting the Guinness certificate to a cheering crowd of thousands.