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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.

Recharge Wrap-up: Nissan Leaf in Puerto Rico, BMW i3 REx tax-free in NJ, BC2BC cancelled [UPDATE]

*UPDATE: Nissan has released a video of the Leaf in Puerto Rico, so we've embedded it below. Envia Systems will develop battery technology for United States Advanced Battery Consortium (USABC), a subsidiary of the United States Council for Automotive Research (USCAR). The $7.7 million contract, co-funded by the US Department of Energy (DOE), involves a 36-month development program focusing on high-energy cathode and anode material for lithium-ion batteries and pouch cells for electric vehicles. The goal, of course, is to create better energy storage for less money in an effort to make commercial EVs more efficient and affordable. For the DOE, this also equates to energy security, energy independence and national security. Read more in the press release at the bottom of the page. The US and China have agreed to work together more closely on EVs, energy and climate issues. US Secretary of Energy Ernest Moniz went to Beijing for the sixth US-China Strategic and Economic Dialogue to meet with leaders. While there, Moniz and Wu Xinxiong of China's National Energy Administration (NEA) signed a memorandum of understanding allowing the DOE and NEA to share information regarding oil reserves. The groups will meet yearly to learn more about how each other manages petroleum stockpiles and policy. Moniz also met with Minister Miao Wei of the Chinese Ministry of Industry and Information Technology and signed an MOU to cooperate on electric vehicles and "related technologies," including the "inter-operability of electric vehicles." Read more at the Energy Department website. August's BC2BC all-electric vehicle rally, billed as the largest gathering of electric vehicles, has been cancelled. The event, which was to include a drive up the entire coast from Mexico to British Columbia with smaller events along the route, failed to bring in the needed sponsorship to hold the rally for its third year. A Facebook post from organizer Tony Williams also cited loss of venue and lack of support from automakers - "particularly Nissan and Tesla" - as hardships. The event was scheduled to take place August 9 through 17, with only battery electric vehicles invited to take part - no plug-in hybrids or range-extended vehicles. Williams said he'd only try a similar event in the future if sponsorship were provided up front. Read more at Green Car Reports. The Nissan Leaf will finally go on sale in Puerto Rico.

Nissan adds 2013 Titan to gearshift recall

Nissan has added the 2013 Titan to the list of vehicles recalled over potential gearshift issues. Just a few days ago, the automaker recalled nearly 20,000 NV Vans for a problem with the shift lever assembly that could cause the gear selector to read inaccurately. Now Nissan is recalling certain 2013 Titan pickup trucks manufactured between December 17, 2012 and February 20, 2013 and equipped with column-mounted shift levers, though for a different fault. The pickups were built using certain chemicals that could cause the brake-shift interlock mechanism to fail over time. If that happens, the truck could be shifted out of Park without the driver's foot on the brake.
As a result, the truck could roll away and cause an accident or injury. Nissan says it will remedy the fault free of charge. Owners can expect to be notified once the campaign begins on or around April 8. You can read the full National Highway Traffic Safety Administration notice below for more information.