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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.

US-built Infiniti Q50 engines to go into Euro-only cars

Back in March, Infiniti announced that it would be adding a 2.0-liter, turbocharged four-cylinder to its Q50 line for European and Chinese buyers. Now, we know where that engine will be built.
Nissan's Decherd, TN facility will receive the $319-million investment, which will see a separate, dedicated line for the Infiniti engines. According to Automotive News, this is more than a line running alongside the Nissan operations - the Infiniti facility will sport its own unique architecture and interior lighting, in a bid to distinguish the premium line from its mass-market parent company.
The logistics of all this do seem, on the surface, quite screwy. Building a new engine on one continent for a car built on another that will eventually go on sale on a third doesn't seem too bright, although there is a catch here. The new engine will also find its way into the Mercedes-Benz C-Class, which will kick off production in Vance, AL later this year.

Court rejects Carlos Ghosn's request to attend Nissan board meeting

TOKYO — A Japanese court has rejected a request by former Nissan chairman Carlos Ghosn, released on bail last week, to attend the Japanese automaker's board meeting on Tuesday. Nissan dismissed Ghosn as chairman after his Nov. 19 arrest, but he remains on the board. The Tokyo District Court said it rejected Ghosn's request on Monday but did not elaborate on the reasons. It had been unclear whether Ghosn could attend the board meeting. The court's approval was needed based on restrictions imposed for his release on bail. The restrictions say he cannot tamper with evidence, and attending the board meeting could be seen as putting pressure on Nissan employees. Prosecutors had been expected to argue against his attendance. They were not available for immediate comment. Ghosn has been charged with falsifying financial reports in underreporting his compensation and breach of trust in making payments to a Saudi businessman and having Nissan shoulder investment losses. He insists he is innocent, saying the compensation was never decided or paid, the payments were for legitimate services and Nissan never suffered the losses. Since his release on March 6 from Tokyo Detention Center on 1 billion yen ($9 million) bail, he has been spotted taking walks in Tokyo with his family, but he has not made any comments. His attempt to exercise what his lawyer, Junichiro Hironaka, called his "duty" by attending the board meeting signals one way he may be fighting back. Hironaka has said Ghosn will speak to reporters soon. A date for a news conference has not been announced. Nissan said Monday that Renault Chairman Jean-Dominique Senard, Renault Chief Executive Thierry Bollore, Nissan Motor Co. CEO Hiroto Saikawa, and Osamu Masuko, the chairman and CEO of Mitsubishi Motors Corp., will hold a joint news conference Tuesday after the board meeting. Nissan appears determined to highlight new leadership without Ghosn. It is part of an alliance with Renault SA of France, and more recently with Japan's Mitsubishi Motors, that was largely cobbled together by Ghosn, who led Nissan for two decades. Nissan, which makes the March subcompact, Leaf electric car and Infiniti luxury models, has denounced Ghosn for alleged misconduct. A decision at a shareholders' meeting is needed to remove Ghosn from the board. A shareholders' meeting is scheduled for next month.