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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.

2014 Nissan Versa Note priced from $13,990*

With the 2014 Nissan Versa Note going on sale this month, Nissan has announced the official pricing for its redesigned subcompact hatchback. Commanding a $2,000 premium over the Versa sedan, the new Versa Note will have a starting price of $13,990 (*not including $790 for destination), which is $680 less than the 2012 Versa Hatchback.
The base model is the Versa Note S, but trim levels also include S Plus and SV starting at $15,240 and $15,990, respectively. The S Plus trim will deliver the highest fuel economy - best in class according to Nissan - for the Versa Note thanks to a CVT and active grille shutters, and the SV brings more convenience features like power windows and door locks (that's right, the base models will still get crank windows and manual door locks). Stepping up even further, the SL Package will add push-button starter, backup camera and heated seats for $17,690 while the SL Tech Package tops out at $18,490 with navigation, Nissan's Around View Monitor and Bluetooth. More pricing details for the 2014 Versa Note are posted below in the official press release.

Carlos Ghosn brings Nissan Leaf EV to happy nation of Bhutan

The Nissan Leaf has been declared the cleanest car in the US, and it's going to have a good case to claim the same title in Bhutan. Yes, Bhutan, the country famous for measuring Gross National Happiness is about to get serious about the EV Grin. Last December, we learned that Bhutan's capital city, Thimphu, wanted to build up a Leaf taxi fleet. That's when Renault-Nissan CEO Carlos Ghosn went to Bhutan to talk about the project and he has recently returned to deliver some vehicles to the Prime Minister of Bhutan, Tshering Tobgay, who has been advocating for EVs since taking office in July and has set a preliminary target of 2,000 EVs on the streets of Thimphu. Tobgay said his country, "will commit to a program to achieve zero emissions as a nation by a certain target date." It's not an outrageous goal for the Himalayan country, since it generates a lot of hydro-electric power, way more than it can use. There are only around 750,000 citizens of Bhutan and they only use five percent of the clean power made within its borders. Most of the rest goes to neighbor India. The problem, as expressed in Nissan's press release (available below), is that Bhutan takes "almost all of the revenue earned from selling electricity" to buy fossil fuel from India and power its national vehicle fleet. You can probably see how making the switch to EVs can simplify and clean things all around. There's a video of Ghosn's Bhutan trip below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Nissan Partners with Bhutan on National EV Strategy Feb. 21 – Thimphu, Bhutan – An electric revolution has begun in Bhutan. The remote Himalayan country, renowned for championing "Gross National Happiness," has taken first steps towards becoming a leading global electric-vehicle nation. Prime Ministers of Bhutan, Tshering Tobgay and Nissan CEO, Carlos Ghosn Prime Minister Tshering Tobgay and Nissan CEO Carlos Ghosn announced a partnership in Thimphu Friday, which will see both parties work toward achieving Bhutan's ambitious clean-energy goals. "We will develop a program, we will commit to a program to achieve zero emissions as a nation by a certain target date," said Tobgay who has backed the EV project since taking office in July last year.