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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's new GT-R boss says next car will go for more volume

Since its introduction in 2008, the Nissan GT-R has seen a steady increase of power and price almost every year, but the big news for the next-gen supercar might be an increase in production. Automotive News recently spoke with newly appointed GT-R chief engineer Kinishi Tanuma who said Nissan needs "more of a volume car." Nissan has sold a little more than 2,000 GT-Rs in the US since 2012 - 1,188 last year and 952 so far this year.
Of course, a key limiting factor in the GT-R's production is its hand-built engine. Currently, only four people are qualified to build the GT-R's twin-turbo V6, but Tanuma says a fifth is in training. Even if production numbers are raised, Nissan also wants to add more quality and value into the GT-R. There is still no word as to what kind of timeframe Nissan is looking to start pumping out more GT-Rs, but with a new Nismo model rumored to be bringing a two-second 0-60 time, demand is sure to be on the rise.

Intel-Mobileye tech in 2M BMWs, VWs, Nissans will crowdsource maps for autonomy

Intel Chief Executive Brian Krzanich said on Monday 2 million vehicles from BMW, Nissan and Volkswagen would use its unit Mobileye's technology to crowdsource data for building maps that enable autonomous driving. The world's largest chipmaker bought Israeli firm Mobileye last year to compete with peers such as Qualcomm and Nvidia Corp and tap the fast-growing market of driverless cars, filled with a complex tangle of alliances. (VW, for example, is also working with Nvidia.) Krzanich was the keynote speaker at the Consumer Electronics Show. He said data from Mobileye's Road Experience Management software would gather data to build and update scalable high-definition maps. He also announced that Intel would be working with Ferrari on AI drones to cover Ferrari Challenge North America Series racing. The drones would provide video of the races, but ultimately they would provide drivers with data — video that would let them see their racing performance from overhead, but also telemetry information about, say, how they enter and exit a turn. Intel will also tie up with SAIC Motor Corp, which will use Mobileye technology to develop Level 3, 4 and 5 autonomous cars in China, the chipmaker said. Krzanich also said Intel had not received any information of customer data being compromised so far after the company confirmed last week that security issues reported by researchers in its widely used microprocessors could allow hackers to steal sensitive information from computers, phones and other devices. Security researchers had disclosed two security flaws exposing vulnerability of nearly every modern computing device containing chips from Intel, Advanced Micro Devices and ARM Holdings. Reporting by Philip GeorgeRelated Video: Image Credit: Intel Auto News Green CES BMW Ferrari Nissan Volkswagen Technology Autonomous Vehicles CES 2018 nvidia intel mobileye