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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.

Chrysler, Nissan minivans earn 'dire' crash test results, says IIHS [w/video]

First introduced in 2012, the Insurance Institute for Highway Safety's small-overlap frontal crash test has become the bane of many auto engineers' existence. It's a particularly steep design challenge because it forces just 25 percent of a vehicle's front end to take the brunt of a 40-mile-per-hour impact. The newly released results of four family-minded minivans underscore just how difficult the crash test is: only one scored an Acceptable rating, and the other three did very poorly. The 2008-2015 Chrysler Town & Country and Dodge Grand Caravan, plus the 2011-2015 Nissan Quest, all received Poor ratings in the test, the IIHS' lowest possible score. The three of them showed significant crash intrusion into the driver's area. The dummy in the Nissan actually had to be cut out of the vehicle, with an IIHS spokesperson remarking, "the structure collapsed like a house of cards." In the Fiat Chrysler Automobile vans, the steering wheels moved out of the way, making the airbag less effective and letting the driver's head hit the dashboard. While it was not actually crashed, the agency is also giving the 2009-12 Volkswagen Routan a Poor score because it shares a structure with the FCA models. The newly released results of four minivans underscore just how difficult the small-offset crash test is. The refreshed 2015 Toyota Sienna (shown), conversely, earned an Acceptable rating and is also a Top Safety Pick+ because of its optional forward collision warning and automatic braking system. While the crash test dummy moved around during the impact more than the agency would have liked, sensors showed a low risk of injuries. The IIHS tested the Honda Odyssey last year, and it earned a Good overall score, the agency's best ranking. It's also a Top Safety Pick+ vehicle. The only member of the minivan segment left to test is the latest Kia Sedona, and the Institute is reportedly waiting a little longer for Kia to make changes to improve the model's performance. When reached for comment, Nissan spokesperson Steve Yaeger provided Autoblog with the following statement: "Nissan is committed to vehicle safety and believes that consumers should have information about crash protection so they can make educated buying decisions. Nissan is proud of the 2014 Quest's "good" rating in the IIHS front moderate overlap and side impact tests as well as a "good" head restraint rating.

Nissan installs 1,000th CHAdeMO fast charger in Europe

While the European Union hasn't been very supportive of CHAdeMO stations, the fast chargers are seeing significant growth in the European electric vehicle (EV) infrastructure, with Nissan installing number 1,000 at the Roadchef Clacket Lane Services in Surrey, UK recently. In the past year, the number of CHAdeMO fast chargers nearly doubled in Europe, starting from about 600 stations in early 2013, and that's helping make EVs more useful. Nissan says that installation of a CHAdeMO station along Norway's E18 highway increased EV use eightfold there in the 18-month period after that station was installed. The new CHAdeMO station in the UK is available to use for free and, like other CHAdeMO stations, can charge a Nissan Leaf or other compatible EV up to an 80-percent charge in just under 30 minutes. Japanese automakers like Nissan and Mitsubishi are dedicated to the CHAdeMO but German and US automakers continue to support a competing technology in Europe and abroad, the SAE Combo DC fast charger. Tesla Motors has covered all the bases as it rolls out its $1,000 CHAdeMO adapter for its Supercharger stations. Nissan worked with Ecotricity, a UK green energy firm considered to be a pioneer in EV charging, for the Surrey installation. Nissan says that installing it on the M25 highway south of London helps EV drivers gain easy access to Kent and onward into Europe on one of the busiest roads in Europe. That will help drivers of the Leaf and the upcoming Nissan e-NV200 electric van to quickly extend their journeys, said Jean Pierre Diernaz, Nissan's director of electric vehicles, in the press release available below. 1,000th CHAdeMO standard quick charger installed in the UK UK has 18% of Europe's electric vehicle quick chargers Charger provides free, zero carbon electricity from Ecotricity Chargers recharge electric cars from 0-80% in 30 minutes Nissan has announced 1,000 CHAdeMO quick chargers have now been installed in Europe with the commissioning of the charger at the Roadchef Clacket Lane Services in Surrey, UK. The fast charging unit can recharge the batteries of compatible* electric vehicles - including the 100% electric Nissan LEAF - from zero to 80 percent charge in just 30 minutes, and at zero cost. The installation of the fastest type of chargers dramatically increases the uptake and usage of electric vehicles.