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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 CEO Hiroto Saikawa resigns, successor to be named

YOKOHAMA, Japan — Nissan Chief Executive Hiroto Saikawa tendered his resignation Monday after acknowledging that he had received dubious income and vowed to pass the leadership of the Japanese automaker to a new generation. Board member Yasushi Kimura told reporters at an evening news conference at company headquarters in Yokohama that the board has approved Saikawa's resignation, effective Sept. 16, and a successor will be appointed next month. A search is underway, he added. Calls for Saikawa's resignation, which arose after the arrest last year of his predecessor, Carlos Ghosn, on various financial misconduct allegations, have grown louder after Saikawa acknowledged last week that he had received dubious payments. The income was linked to the stock price of Nissan Motor Co., and he has said his pay got inflated by illicitly adjusting the date for cashing in. The automaker's board met to look into the allegations against Saikawa, as well as other issues related to Ghosn's allegations and corporate ethics at the company. Kimura said the income Saikawa had received was confirmed as "not illegal." Ghosn, who is out on bail and awaiting trial, says he's innocent. Kimura and three other board members, who all have backgrounds outside the company, said their investigation of the scandal over Ghosn's arrest found that alleged misconduct by Ghosn and Greg Kelly, a former board member who was also arrested, had caused 35 billion yen ($350 million) in damage to the company. Nissan will seek a repayment of the damages, Kimura said. The board said about 10 candidates are being considered as a replacement for Saikawa. They did not identify them, but said outsiders and non-Japanese are on the list. Until a successor is decided, Chief Operating Officer Yasuhiro Yamauchi will serve as interim chief, the board said. Saikawa has not been charged. "I have been trying to do what needs to be done so that I can pass the baton over as soon as possible," he told reporters earlier in the day, referring to his willingness to leave his job. Saikawa did not appear at the news conference initially, but the four board members who led the event said he would later. Saikawa has said he didn't know about the improprieties, promised to return the money and blamed the system he said Ghosn had created at Nissan for the dubious payments. Japanese media reports said Saikawa had received tens of millions of yen (hundreds of thousands of dollars) in extra compensation.

Renault-Nissan goes for closer cooperation, outsells VW and Toyota

PARIS — Renault-Nissan plans to double cost savings to nearly $12 billion by 2022, partly through closer cooperation with Mitsubishi, but left key questions about the automakers' alliance unresolved. Chairman Carlos Ghosn has pledged to step up the pace of integration after Nissan took a controlling stake in Mitsubishi last year. The 18-year-old Renault-Nissan pairing has only recently begun rolling out cars on common architectures. Combined sales volumes are expected to rise to 14 million vehicles by 2022 from 10.5 million expected this year, with revenue advancing by a third to $240 billion, the alliance said at a news conference in Paris on Friday. However, any investors impatient for a new capital or management structure to speed integration and prepare Ghosn's succession were likely to be disappointed. There was "no answer from Ghosn on the possibility of a merger by 2022," Jeffries analyst Philippe Houchois noted.12 NEW ALL-ELECTRICS Ghosn has been seeking a new second-in-command, sources told Reuters in June. But such plans are linked to thornier questions about the balance of power between the two main carmakers and the French government's outsize clout as Renault's biggest shareholder, supported by double voting rights. Twelve new pure-electric models will be on the road by 2022 as Renault-Nissan seeks to defend the head-start it gained with the current generation of battery cars, spearheaded by the Nissan Leaf and Renault Zoe, as more competitors join the fray. With 5.27 million cars and vans delivered in the first half of the year, Renault-Nissan now claims the mantle of the world's biggest carmaker, ahead of Volkswagen and Toyota, even though Renault has never consolidated the sales of its 43.4 percent-owned Japanese affiliate into its own. Under existing plans, the alliance is seeking to increase synergies — from cutting costs and boosting revenue — to 5.5 billion euros next year from 5 billion recorded in 2016. SHARED PLATFORMS A fourth common vehicle platform will be shared across the alliance by 2022, the companies said on Friday, underpinning a future generation of electric cars which, together with hybrids, are expected to account for 30 percent of group sales. Renault-Nissan will aim to deliver more electric vehicles and also make greater use of shared technology and manufacturing processes.