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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.

Driving the Toyota Supra, Honda Passport and BMW 3 Series | Autoblog Podcast #582

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Green Editor John Beltz Snyder and West Coast Editor James Riswick. First, they talk about the cars they've been driving, including the Honda Passport, BMW 330i and Audi RS5. They follow up with notes about driving the Toyota Supra and 86, and whether Toyota's new sports car strategy makes sense. Then they discuss the news, including the Ferrari SF90 Stradale plug-in hybrid, a possible Renault-FCA merger, death rumors for the Jaguar XJ and thoughts on the upcoming Chevy Trailblazer. Autoblog Podcast #582 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving: 2019 Honda Passport 2019 BMW 330i 2019 Audi RS5 Sportback Toyota Supra, 86 and the company's sports car strategy In the news: Ferrari SF90 Stradale FCA and Renault Jaguar XJ going away? Chevy Trailblazer Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

Carlos Ghosn's son predicts surprises at ex-Nissan chief's day in court

PARIS — The son of former Nissan chairman Carlos Ghosn said in an interview published Sunday that people will be surprised when his father, detained since Nov. 19 for allegedly falsifying financial reports, recounts his version of events to a Tokyo court on Tuesday. Anthony Ghosn, 24, told France's Journal du Dimanche that his father — who will remain detained until at least Jan. 11 — will get 10 minutes to talk at the hearing, being held at his own request. "For the first time, he can talk about his version of the allegations against him," Anthony Ghosn said in the interview with the weekly paper Journal du Dimanche. "I think everyone will be rather surprised hearing his version of the story. Until now, we've only heard the accusers." The son has no direct contact with his father, and gets information via lawyers. He said his father, who for decades was a revered figure in the global auto industry, has lost about 10 kilograms (22 pounds) eating three bowls of rice daily, but he reads books and "he resists." Ghosn refuses to cave in, said his son, contending that he would be freed from detention if he admitted guilt to the prosecutor. "But for seven weeks, his decision has been quite clear ... He won't give in," Anthony Ghosn said, adding that he would be wearing prison clothes and handcuffs in court. Countering media portrayals, he insisted his father, a Brazilian-born Frenchman of Lebanese ancestry, is "not obsessed by money." "He always told us that money is but a means to help those you love, but not an end unto itself." Ghosn is charged with underreporting his pay by about 5 billion yen ($44 million) in 2011-2015, and faces a breach of trust allegation. He led Nissan Motor Co. for two decades and helped save the Japanese automaker from near bankruptcy. He remains head of France's Renault car company, which owns 43 percent of Nissan. Another Nissan executive, Greg Kelly, was arrested on suspicion of collaborating with Ghosn on the underreporting of income and was freed Dec. 25 on 70 million yen ($635,600) bail after more than a month in detention.Related Video: