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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: We lose money on each Leaf replacement battery

Nissan has been playing its cards pretty close to its chest when it comes to the production costs for Leaf battery packs. The company recently put a price on replacement batteries for customers at $5,500 plus the requirement to return the old battery. If the decommissioned battery is worth $1,000 to Nissan, as they have stated, that means the battery costs about $6,500 to make, right? Maybe even less if Nissan wants to turn a profit, as automakers are wont to do? Wrong.
Green Car Reports spoke to Nissan about these battery costs, and found that the automaker actually loses money on selling the replacement battery for the Leaf at the current price. Jeff Kuhlman, Nissan's vice president of global communications said, "Nissan makes zero margin on the replacement program. In fact, we subvent every exchange." All you English majors will know that "subvent" is a fancy way to say "subsidize." Kuhlman added, though, "We have yet to sell one battery as part of the program."
The fact that Nissan offers its replacement batteries for less than it costs to manufacture them is telling of a company both cares about what its customer needs and is dedicated to the success of its product. In this case, both of those things encourage people to give up fossil fuels and adopt electric mobility, which is heartening. As more people switch to battery-powered driving, though, battery technology should become better and cheaper, and the scale of production should cause manufacturing costs to decrease. Eventually, Nissan could easily see itself breaking even selling the Leaf battery replacements.

Nissan slashes profit forecast as Ghosn arrest hurts brand appeal

TOKYO — Nissan cut its profit forecast for the fiscal year through March on Wednesday to reflect slowing sales, higher costs and the fallout from a criminal investigation of its former chairman, Carlos Ghosn. Nissan Motor Co. expects to post a 319 billion yen ($2.9 billion) profit for the fiscal year, marking a 22% drop from its earlier 410 billion yen ($3.7 billion) forecast. Nissan said the downgrade reflects higher costs in the U.S. from a warranty extension campaign for some vehicles and falling sales due to "corporate issues," alluding to the Ghosn scandal. Ghosn was arrested in November and is facing charges of underreporting his income and breach of trust. He says he is innocent. He was released on bail in March and is awaiting another court decision on bail after his re-arrest on April 4. Nissan, which is allied with Renault SA of France, has seen sales lag in France and Japan, where Ghosn is widely known. In the U.S. and China, buyers aren't as affected by the scandal, but the markets there overall have slowed. Other factors contributed to the revision, such as production not keeping up with demand for the Note, an extremely popular model in Japan. But the high-profile scandal has weakened the brand appeal of the maker of the Leaf electric car, Infiniti luxury model and X-trail sports utility vehicle. Nissan said it expects to sell 5.5 million vehicles in this fiscal year. Earlier it predicted it would sell 5.6 million. The company sold nearly 5.8 million vehicles in the fiscal year that ended in March 2018. The automaker reduced its sales outlook by 0.2% for the fiscal year through March 2019 to 11.5 trillion yen ($103 billion), compared to its previous forecast. It was Nissan's second downgrade for its outlook following one in February that cited faltering sales in China and the U.S. At that time, Nissan also logged costs about 9.2 billion yen ($83 million) related to the alleged underreporting of Ghosn's compensation. Nissan has promised to strengthen its corporate governance to prevent a recurrence of what it says is serious wrongdoing by Ghosn. Ghosn was sent by Nissan's French alliance partner, Renault SA, to help turn the Japanese automaker around when it was near bankruptcy 20 years ago. The future of the alliance is one of many questions clouding Nissan's future following Ghosn's ouster since he was the main liaison for the alliance, which includes smaller Japanese automaker Mitsubishi Motors.