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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.

Nissan is exploring the sale of its 34% stake in Mitsubishi

TOKYO — Nissan is looking to sell some or all of its 34% stake in Mitsubishi Motors, Bloomberg News reported on Monday, citing unidentified sources, a move that would reshape a three-way alliance that includes France's Renault. Nissan shares rose 5% on the news. Mitsubishi Motors was up 3%. "There are no plans to change the capital structure with Mitsubishi," a Nissan company spokeswoman told Reuters in an emailed statement. A Mitsubishi Motors spokesman said the same, adding the company would continue to collaborate within the alliance. Renault did not immediately respond to an email seeking comment. Nissan, struggling to recover from the pandemic-induced downturn, could sell its stake to a Mitsubishi group company such as Mitsubishi Corp, which already owns a fifth of Mitsubishi Motors, Bloomberg said. Such a deal would fundamentally alter a three-way partnership built by Carlos Ghosn, former chairman of the alliance, which plunged into confusion when he was arrested in 2018 on charges of financial misconduct. Ghosn had wanted a full merger of Renault and Nissan, which was shelved, according to Reuters sources, as the companies decided to fix the troubled alliance. The pandemic has, however, compounded problems and made a recovery hard. Nissan, which is 43% owned by Renault, last week cut its operating loss forecast for the year to March by 28%, helped by a rebound in demand, especially in China. Mitsubishi Motors, Japan's No.6 automaker, expects to post an operating loss of 140 billion yen for the business year. Both companies are cutting production levels and costs in a bid to return to profitability. Related Video:

Prince Charles tours Nissan Leaf plant in Sunderland, UK

Environmental sustainability and job training. Those are two of the issues the UK's Prince Charles, the Prince of Wales, has long supported. And that's why the king-to-be paid a visit to Nissan's Sunderland plant earlier this week. As shows in a two-minute video from Broadcast Exchange, Prince Charles took a tour of the plant, checking out the production line while conferring with the young (and slightly star-struck) students there who were learning a thing or two about building a car, electric Nissan style. The Sunderland plant is located about 285 miles north of London. The factory runs an apprenticeship program for budding car-builders and employs about 6,700 people. The Nissan Leaf electric vehicles built there are sold in Europe, where Leaf sales jumped 33 percent last year. Opened in 1986, the Sunderland factory broke ground on its battery-production facilities in 2010 and began producing the Leaf in the spring of 2013 after Nissan invested about $635 million upgrading the plant to handle electric-vehicle and lithium-ion battery production. Even before the EV battery production activity the Sunderland plant burnished its green credentials by installing wind turbines to help with the power supply. Prince Charles already has his credentials (sort of), thanks to a biofuel Jaguar and a wine-powered Aston Martin. Check out the video with Prince Charles below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.