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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.

Jay Leno checks out Nissan IDx Nismo, spiritual successor to classic Datsun 510

Jay Leno may not be spending his night behind the Tonight Show desk anymore, but he's clearly not done rolling precious metal into his garage, intent on putting it through its paces after a thorough investigation. The latest machine to meet Jay on his home turf is the Nissan IDx Nismo Concept that we first saw at the Tokyo Motor Show late last year.
Leno already has love for the classic Datsun 510, which plays a cameo in the video that you'll see below, and he refers to the IDx as the spiritual successor to that car's ethos - driving fun in an affordable package. Fortunately for us, while the IDx is a showcar first and foremost, it is indeed driveable, and Leno, naturally, takes his turn behind the wheel.
Scroll down to watch the complete video below.

Tesla about to sell 50,000th Model S

Nissan sold its 50,000th Leaf a total of two years and two months after introducing the EV to dealerships. Tesla isn't as established as Nissan, and its Model S - with its higher levels of luxury and performance - costs multiple times more than the Leaf. Consider the Tesla's starting price of $70,000-plus (and easily much more with a bigger battery and a few upgrades), and compare that to the Leaf's base MSRP of just a bit over $30,000 before its 2013 price cut. It would make sense, then, that it would take the Model S longer to hit 50,000 unit sales. But, no. The Model S could meet the 50,000 sales milestone before the end of October (in fact, it may already have done so). This is just two years and three months after it launched in late June 2012. The Model S could meet the 50,000 sales milestone before the end of October. Tesla hasn't released its sales report for the third quarter, but the Palo Alto-based automaker sold 39,128 units of the Model S through June. Previously, Tesla estimated it would have 7,800 third quarter sales (putting it at 46,928 through September), other independent estimates put Tesla at 50,000 sales in late October. The Model S may not have beat the Nissan Leaf to 50K, but it's not hard to see how this is a win for the California automaker. Arguably, this is a case where we all win. Anytime some buys an EV instead of a traditionally powered vehicle - regardless of marque - that's less energy consumed while driving, fewer emissions and an example set to others who have yet to make the switch. It's hard not to be impressed by Tesla's relative success. Furthermore, Tesla coming so close to Nissan in selling 50,000 EVs is, above all, a testament to the desirability of the Model S, despite the Leaf's clear advantage in terms of attainability.