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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.

Renault-Nissan promises 10 autonomous models through 2020

Renault-Nissan boss Carlos Ghosn promised back in 2013 to have autonomous technology on the road by 2020, and now the automaker has pledged to have more than 10 models ready in that time with varying levels of autonomous capabilities. The company claims it will offer these systems to customers around the world at affordable prices in major markets like the US, Europe, Japan, and China. Renault-Nissan will introduce driverless tech in multiple phases over the next four years. The first step will come later this year with the introduction of a single-lane autonomous system that will be able to go down the highway and manage stop-and-go traffic automatically. The next innovation in 2018 will offer multi-lane capability, and the ability to automatically pass other vehicles on the road. Another big jump will come in 2020 with the ability for models to navigate intersections and urban areas without a driver's control. Renault and Nissan engineers will develop all of this together, and the results will be available in both of the company's brands. Ghosn explained this roadmap towards an autonomous future last year but cautioned that Renault-Nissan didn't plan to take complete control away from owners. Instead, the company sees these systems as a way to make people even safer behind the wheel by reducing the chance for driver error. The automaker's deliberate introduction strategy is prudent because it can potentially adapt to proposed regulations that could mandate rules on how piloted vehicles operate. RENAULT-NISSAN TO LAUNCH MORE THAN 10 VEHICLES WITH AUTONOMOUS DRIVE TECHNOLOGY OVER THE NEXT FOUR YEARS World's fourth largest car group confirms autonomous drive and connectivity timeline through 2020 Fatal and serious injuries have been significantly reduced; new technologies will help make cars even safer Car group hires new executive to oversee connectivity and connected car services globally SUNNYVALE, Calif. – The Renault-Nissan Alliance will launch more than 10 vehicles with autonomous drive technology in the next four years. The global car group confirmed today that it will launch a range of vehicles with autonomous capabilities in the United States, Europe, Japan and China through 2020. The technology will be installed on mainstream, mass-market cars at affordable prices. In addition, Renault-Nissan will launch a suite of new connectivity applications that will make it easier for people to stay connected to work, entertainment and social networks.

Nissan posts $6.2 billion annual loss and unveils plan to cut costs

TOKYO — Nissan outlined a new plan on Thursday to become a smaller, more cost-efficient carmaker after the coronavirus pandemic exacerbated a slide in profitability that culminated in its first annual loss in 11 years. Under a new four-year plan, the Japanese manufacturer will slash its production capacity and model range by about a fifth to help cut 300 billion yen from fixed costs. It will shut plants in Spain and Indonesia, leave the South Korean market and pull its Datsun brand from Russia as part of a strategy unveiled on Wednesday to share production globally with its partners Renault and Mitsubishi. "I will make every effort to return Nissan to a growth path," Nissan Chief Executive Makoto Uchida said, adding that the company had learned from its past mistakes of chasing global market share at all costs. "We must admit failures and take corrective actions," he said, adding that starting with top-level managers, the company had to break its inward-looking culture which in the past has stymied efforts to deepen cooperation with France's Renault. Uchida said improving the company's cash flow was its biggest challenge. He reiterated that Nissan's cash liquidity was good even though it had negative free cash flow of 641 billion yen in the year ended in March. Nissan declined to give any forecasts for its current financial year which started in April due to the uncertainty created by the coronavirus pandemic. It also declined to give details on how many jobs it was cutting. In what is Nissan's second recovery plan in less than a year, Uchida pledged a return to profitability with a core operating profit margin above 5% and a sustainable global market share of 6%. Nissan posted an annual operating loss of 40.5 billion yen for the year to March 31, its worst performance since 2008/09. Its operating profit margin was -0.4%. The automaker said on Thursday that it sold 4.9 million vehicles last year, up from an earlier estimate of 4.8 million. That was still the second decline in a row and a fall of 11% from the previous period but meant Nissan clung on to its position as Japan's second biggest carmaker, just ahead of Honda and a long way behind Toyota. Pandemic pressure Even before the spread of the novel coronavirus, Nissan's slumping profits had forced it to row back on an aggressive expansion plan pursued by ousted leader Carlos Ghosn. The pandemic has only piled on the urgency to downsize.