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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 Patrol modified for backseat drivers

The McLaren F1 is most famous for holding the production-car top-speed record for over a decade, but it also made a name for itself by being one of the only production cars with a central driving position, a feature that's extremely rare. But in the world of custom cars, anything can happen. We're not sure if Dubai-based shop King of Customs was inspired by McLaren or is poking fun at backseat drivers (perhaps the builder or the commissioner just has quite the imagination), but its custom fifth-generation Nissan Patrol (the foundation of the Infiniti QX80 in the US) sports utility vehicle takes the term "central-driving position" to the next level. In the Patrol's case, "central" means that the driver's seat and controls are located in the second-row seating area.
It's a pretty clean conversion - if pointless - and we have to wonder how safe it is to drive such a vehicle. The front seats are now passenger seats, and the front airbags have been taken out and replaced with screens, according to King of Customs' Facebook page. So if the driver's view outside is impaired and the SUV is involved in a crash, you'd better hope nobody is up front. The screens on the backs of the front-seat headrests at least provide views from the side-view mirrors via cameras, the shop claims.
Watch the video below, marvel at the extreme impracticality of it all and see the thing drive.

'Charge lock' on Nissan Leaf doesn't actually prevent cable theft

Is it a feature or a bug? According to AutoblogGreen reader Francois Viau, the locking mechanism that holds the 110V trickle charge cable to his Nissan Leaf is too weak, and that's a problem. That's because while he thought the cable was locked to his car during a charge session at work, someone stole the cable, and it cost him $2,200 to replace it (in Canadian dollars, from the Nissan dealer). To see just how easy it is to unlock the mechanism, Viau had a "small assistant" jimmy it open with a plastic comb on video (watch it below). "The charge lock feature on Nissan Leaf is not intended to prevent theft of the charging cordset." – Brian Brockman We wondered if this was a common problem and, through the magic of Facebook, we had AutoblogGreen reader Phil Tipper try it out on his 2013 SL Leaf. He said he used an insulated handle flat screwdriver and was not able to defeat the lock. "I admit that I didn't want to force the mechanism for fear of breaking it, it didn't look like that kid used much force at all," he said. "Maybe this guy's mechanism was damaged in the theft and now it's very easy to trip the lock out of the way." Fifty percent of a sample size of two isn't a reliable metric, but if you're worried about locking your cable in place, you can see some of Viau's anti-theft solutions here (in French, with pictures). Turns out, though, that the white plastic bit that prevents the cable handle from working during a charge isn't really an anti-theft device. Brian Brockman, senior manager of corporate communications for Nissan North America, told AutoblogGreen that, "The charge lock feature on Nissan Leaf is not intended to prevent theft of the charging cordset. It is designed to discourage someone from unplugging the vehicle while a charging session is in progress. The trickle charge cable features a small hole in the release button to allow the owner to insert a lock to reduce the chance of theft." So, now you know. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.