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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.

Carlos Ghosn appears in court: 'I am wrongly accused'

TOKYO — Former Nissan Chairman Carlos Ghosn told a Tokyo court on Tuesday that he was innocent, defending his honor in his first public appearance since he was arrested on Nov. 19 and charged with false financial reporting. "Your honor, I am innocent of the accusations against me," Ghosn told the judge, speaking firmly and calmly as he read from a statement. "I am wrongfully accused." Prosecutors have charged Ghosn, who led a dramatic turnaround at the Japanese automaker over the past two decades, with falsifying financial reports in underreporting his income by about 5 billion yen ($44 million) over five years through 2015. They also say he is suspected of having Nissan temporarily take on his investment losses from the financial crisis. Seen for the first time since his November arrest, Ghosn was wearing a dark suit without a tie, and plastic slippers, and looked thinner and with gray hair. He rebutted the allegations against him point-by-point and said he had the option to leave Nissan but had decided to stay on. "A captain doesn't jump ship during a storm," he told the court in a strong voice. The veteran auto executive, a familiar face at the World Economic Forum and other elite gatherings, was handcuffed and led into the courtroom with a rope around his waist as the hearing began. Officers uncuffed him and seated him on a bench. Presiding judge Yuichi Tada then read out the charges and said Ghosn, a Brazilian-born Frenchman of Lebanese ancestry, was considered a flight risk — he was arrested on his arrival in Tokyo by private jet — and might try to hide evidence. In Japan, suspects are routinely held without bail, often due to fears about evidence tampering. During Tuesday's hearing, Go Kondo, one of Ghosn's lawyers, argued he was not a flight risk. "He's widely known so it's difficult for him to escape. There is no risk that the suspect will destroy evidence," he said. Facing the courtroom, Ghosn spoke proudly of the automaker's — and his own — achievements, such as reviving iconic models like the GT-R and the Z, expanding operations in China, Russia, Brazil and India and pioneering electric cars and autonomous driving. "I have a genuine love and appreciation for Nissan," he said. Ghosn has been held in spartan conditions at a Tokyo detention facility since he was taken into custody. In keeping with Japanese regulations, he has been allowed visits only from his lawyers and consular officials.

Recharge Wrap-up: first Chevy Volt hits 200K miles, DriveNow launches in London with BMW i3 on deck

The first Chevrolet Volt has driven over 200,000 miles. According to the owner, Erick Belmer, the car, which he purchased on March 28, 2012, is "holding up flawlessly" with "no noticeable battery capacity loss." Belmer has a commute of about 220 miles per day, rotates his tires every 10,000 miles, and gets an oil change every 38,000 miles. Belmer still loves driving his "dream car" every day, and says it is "wonderfully engineered." Read more at Inside EVs. DriveNow has launched in London, and will include the BMW i3 as part of its carsharing fleet. Daimler shut down its Car2go operations there just six months ago. Currently, DriveNow members have access to the BMW 1 Series and Mini Countryman, but come spring of 2015, DriveNow, which is a joint venture between BMW and Sixt SE, will add 30 all-electric i3 EVs to its London service. DriveNow's rates for London are set at 39 pence per minute, with an hourly maximum cost of GBP20 (about 61 US cents and $31, respectively). The service currently operates in the boroughs of Islington, Haringey and Hackney, with hopes of expanded service in the near future. Read more at Hybrid Cars or at Reuters. FIA's Formula E electric racing championship series received the Autosport award for Pioneering and Innovation. The award ceremony was a black-tie event at the Grosvenor House Hotel in London. Formula E CEO Alejandro Agag accepted the award. "Many people in motorsport, when we started Formula E, didn't think we would make the first race," says Agag. "To announce we were doing a championship with cars that didn't then exist was a real challenge. But after that first race in Beijing, everything worked." Read more at Formula E's website. The Nissan Leaf has driven over a billion collective kilometers. That's more than 621.3 million miles. Nissan said in August that it expected to reach that mark by January, and it has done just that. To celebrate, Nissan Europe has created a video to thank its 147,000 Leaf drivers to bring the car to that substantial milestone in less than four years. Check out the video below. Featured Gallery 2014 Chevrolet Volt View 11 Photos Related Gallery 2014 BMW i3: First Drive View 33 Photos Related Gallery 2013 Nissan Leaf: First Drive View 15 Photos News Source: Inside EVs, Hybrid Cars, Reuters, Formula E, YouTube: Nissan EuropeImage Credit: Chevrolet Green BMW Nissan Transportation Alternatives Electric Racing Vehicles recharge wrapup