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Nissan Leaf battery cells put through torture test, live to charge again

One minor chink in the armor of the Tesla Model S is that a small number have caught fire, once their battery packs were penetrated. Nissan Leaf drivers, however, might just be able to weather such an event without an ensuing CarBQ. Our evidence for such a claim? A video that has surfaced of cells from a Leaf pack undergoing a battery of torture tests (pun somewhat-ashamedly intended). Shared by folks at the Hybrid Auto Center in Las Vegas – who offer for sale, among other things, used Leaf lithium battery modules – the footage shows salvaged cells being brutally assaulted with a screwdriver, and later, a propane torch. Granted, these tests are not the same thing as flinging a piece of metal into a working pack at 70 miles per hour, but they do claim to show that a puncture does not always equal a fire. Oh, and don't try this at home. When pierced through by the flat head tool, there is no explosion or eruption of flame. Instead, a rather modest wisp of smoke shyly emerges as the electrolyte next to the shorted area of the fully-charged foil pouch reacts with the influx of oxygen. Again and again, the blade descends, until the cell is riddled with holes. No fire. Amazingly, when connected with a voltmeter afterward there are still plenty of signs of life, and when it is charged and discharged (off-camera), it reportedly suffers only a slight loss of charge capacity. The video goes on to show another cell attacked with open flame with similar results. While the demonstration is, perhaps, somewhat crude, the message it sends is loud and clear: lithium batteries can be safe and rather robust, despite some freak accidents. Scroll below to watch the short presentation for yourself. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Cadillac tops Tesla in Consumer Reports semi-automated driving test

General Motors' Cadillac outscored Tesla in a new ranking of partially automated driving systems tested by Consumer Reports and released on Thursday. The highly influential nonprofit organization, which tests and rates a variety of consumer products from appliances to vehicles, said it compared Cadillac's Super Cruise and Tesla's Autopilot with similar systems from Nissan and Volvo. Nissan's ProPilot Assist was ranked third and Volvo's Pilot Assist fourth. Consumer Reports said it has been testing partially automated driving systems for several years but elected to conduct a formal study intended for publication, because "we are at a tipping point where they are now going mainstream," according to Jake Fisher, director of auto testing. The organization said its tests, conducted on a private track and on public roads in Connecticut, were designed to measure the systems' ability to automatically control steering and speed in certain situations, while helping drivers pay attention and regain manual control of the vehicle when required. CR noted that any of these systems can increase driving risk if used in inappropriate situations, or if drivers become inattentive or over-reliant on them. While they can help relieve driver stress and fatigue, Consumer Reports said, the partially automated systems are "not intended to be self-driving features." The systems typically use cameras, radar and other sensors, as well as mapping data, to monitor location and traffic conditions and help keep a vehicle centered in the lane at a safe distance behind other cars. Each system has limitations. Cadillac's Super Cruise, for instance, only functions on divided highways that have been mapped by GM. In contrast, Tesla's Autopilot can be used even on small, curvy roads with poor lane markings, but "operates erratically in those situations," Consumer Reports said.The organization tested Super Cruise on the Cadillac CT6; Autopilot on the Tesla Model 3, Model X and Model S; ProPilot Assist on the Nissan Leaf and Infiniti QX50; and Pilot Assist on the Volvo XC40 and XC60. Consumer Reports said Cadillac's Super Cruise did "the best job of balancing high-tech capabilities with ensuring the car is operated safely and the driver is paying attention." Tesla's Autopilot was cited for its capability and ease of use, while Nissan's ProPilot Assist did a better job than Autopilot or Volvo's Pilot Assist in keeping drivers engaged.

Nissan says Leaf battery packs are nearly bulletproof

Like the old 1970s Schoolhouse Rock song (and an early-90s remake from hip-hop artists De La Soul), three, indeed, is the magic number. That's how many Nissan Leaf batteries have conked out in Europe during the past four-plus years. Out of about 35,000. I'd hate to be a member of that unlucky trio. The Japanese automaker says it has shut up the naysayers who once crowed that electric motors may be less reliable than gas- or diesel-powered engines. Nissan has done so by maintaining a 99.99 percent "battery success rate" in Europe. With only an on-board charger, inverter and motor, the Leaf's electric motor costs 40 percent less to maintain that gas- or diesel-powered engines. Nissan does seem to be getting more converts across the Pond. Nissan boosted European sales of the Leaf by about 33 percent last year to more than 15,000 units. Meanwhile, here in the States, sales jumped 34 percent last year to more than 30,000 vehicles, though early 2015 sales appear to be down as lower gas prices are leading American car shoppers to larger, more gas-swilling vehicles. Still, Nissan recently said it surpassed sales of 75,000 units in the US and we expect the March sales numbers to show that the Leaf has become the top-selling plug-in vehicle in US history. Take a look at Nissan Europe's press release below. Related Videos: Nissan LEAF battery reliably outperforms cynics, critics and alternatives Five years on, Nissan reports 99.99% battery success rate across Europe More reliable than a petrol or diesel engine, according to industry averages Nissan LEAF is the world's best-selling all-electric car, with over 165,000 sold globally Rolle, Switzerland, 23 March 2015: Five years and more than 35,000 European sales since the launch of its all-electric LEAF, proprietary data released by Nissan for the first time shows that 99.99 percent of its battery units remain entirely fit for purpose. The failure rate of the battery power unit is less than 0.01 percent - or just three units in total - a fraction of the equivalent industry-wide? figure for defects affecting traditional combustion engines. To prove the long-term reliability of the battery technology, Nissan tracked down a rather infamous early model, whose owner is still enjoying fault-free motoring in her LEAF three years on: http://youtu.be/6V1bJJwJhEg Electric vehicle advocate and presenter of online TV channel Fully Charged, Robert Llewellyn commented: "This comes as no surprise.