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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's current Rogue renamed Rogue Select, will live alongside next gen

Despite the fact that an all-new generation of its Rogue crossover goes on sale in November, Nissan will continue to sell the current model alongside its replacement. The existing C-platform-based Rogue, which will be renamed Rogue Select, will start at less than $20,000 when it goes on sale in January 2014. At present, a base 2013 Rogue S prices out slightly higher, from $20,310, but we wouldn't be surprised to see the 2014 Rogue Select come to market with more standard equipment and simplified trim options. It will continue to be built in Kyushu, Japan.
According to Nissan, the unusual move is "to satisfy demand for the popular compact sports utility vehicle, currently second-highest seller in Nissan's lineup, as well as provide customers an additional choice in the segment." It's hard to hard to argue with the numbers: Nissan cites 2012 calendar-year sales of 142,349 Rogue units in the US, with 2013 sales increasing 16 percent through August despite the vehicle's age.
The strategy may also give Nissan the chance to ask for more money for the second-generation model (which is based on a new Common Module Family platform shared with partner Renault) while keeping it clear of residual-value-damaging fleet sales. The new Rogue looks to be both larger and more luxurious, with an available third-row seat, and it should be more economical to produce, as it will be built in Nissan's Smyrna, TN plant.

UK electric motor maker YASA expands production 50-fold for EVs

LONDON — British electric motor manufacturer YASA said on Thursday it was increasing its production capacity from 2,000 to 100,000 units with a new factory to tap into growing demand from carmakers for greener technologies. Automakers are racing to build greener vehicles and improve charge times in a bid to meet rising customer demand and air quality targets but Britain lacks sufficient manufacturing capacity, an area the government is building up. Last year, the government picked a site in central England to house a new automotive battery development facility, which will develop the processes required to manufacture the latest battery advancements. On Thursday, YASA, based near the English city of Oxford, said it had raised another 15 million pounds ($21 million) as part of its expansion. "Our customers are looking to adopt innovative new technologies such as YASA's axial-flux electric motors and controllers in order to meet the needs of the rapidly expanding hybrid and pure electric automotive market," said Chief Executive Chris Harris. The firm exports 80 percent of production and has worked with companies including Britain's two biggest carmakers Jaguar Land Rover and Nissan as well as Aston Martin. JLR will decide this year whether to build electric cars in its home market, previously citing factors such as pilot testing and support from science and government as pre-requisites. Reporting by Costas PitasRelated Video: