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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.

Japan calls Ghosn's escape inexcusable and vows tighter immigration checks

TOKYO — Japan's justice minister on Sunday called the flight of former Nissan Chairman Carlos Ghosn as he awaited trial on financial misconduct charges inexcusable and vowed to beef up immigration checks. Justice Minister Masako Mori said she had ordered an investigation after Ghosn issued a statement a few days ago saying he was in Lebanon. She said there were no records of Ghosn's departure from Tokyo. She said his bail has been revoked, and Interpol had issued a wanted notice. Departure checks needed to be strengthened to prevent a recurrence, Mori said. While expressing deep regret over what had happened, Mori stopped short of outlining any specific action Japan might take to get Ghosn back. Japan does not have an extradition treaty with Lebanon. “Our nationÂ’s criminal justice system protects the basic human rights of an individual and properly carries out appropriate procedures to disclose the truth of various cases, and the flight of a suspect while out on bail is never justified,” she said in a statement. MoriÂ’s statement was the first public comment by a Japanese government official after the stunning escape of Ghosn, once a superstar of the auto industry. Tokyo prosecutors issued a similar statement Sunday. They had opposed Ghosn's release on bail, arguing he was a flight risk. First arrested in November 2018, Ghosn was out on bail over the last several months, and more recently had moved into a home in an upscale part of Tokyo. He has repeatedly said he was innocent. His statement from Beirut said he was escaping injustice. Japan's justice system has come under fire from human rights advocates for its long detentions, the reliance on confessions and prolonged trials. The conviction rate is higher than 99%. Even if Ghosn had been found innocent, the prosecutors could have appealed, and the appeals process could have lasted years. Ghosn's trial was not expected to start until April at the earliest. During that time, he had been prohibited from seeing his wife, and was only allowed a couple of video calls in the presence of a lawyer. Ghosn had been charged with underreporting his future compensation and breach of trust in diverting Nissan money for his personal gain. Although the details of his escape are not yet clear, Turkish airline company MNG Jet has said two of its planes were used illegally, first flying him from Osaka, Japan, to Istanbul, and then on to Beirut, where he arrived Monday and has not been seen since.

Nissan's autonomous cars could drive in US first, maybe by 2020

Future shock could be just six short years away, and coming first to the US. Nissan says it might start making autonomous versions of its cars available in the US by 2020, before the tech hits the road in other countries. The Japanese automaker is in extensive discussions with regulators from California, the best-selling state for the Leaf battery-electric vehicle, for allowing self-driving vehicles to be on its roads, Hybrid Cars says, citing a conversation with Nissan executive Andy Christensen at the recent Detroit Auto Show. Many decisions need to be made between now and then, given the hurdles related to issues such as regulations, liability, safety and technology - and Christensen said the first wave of self-driving vehicles would be able to do their thing only on the highway. The vehicle of choice is most likely to be the Leaf because it's completely battery operated, making the conversion to autonomy that much easier. Last summer, Nissan chief Carlos Ghosn first promised production autonomous cars by 2020. The automaker has teamed up with MIT, Stanford, Oxford and others to extensively test its "Autonomous Drive" concepts since then. Late last year, Nissan tested a self-driving Leaf on Japanese public roads. Nissan is not alone promoting autonomous driving as a way to increase safety, fuel economy and traffic flow, just some of the reasons why the idea may be the wave of the nearer-than-we-thought-future. For example, the company says 93 percent of accidents are caused by driver error.