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March 04, 2019 01:00 AM

Volkswagen recycling project targets spent batteries

Larry P. Vellequette
Automotive News
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    MEB platform: Will underpin most VW EVs.

    The auto industry's big push into electric vehicles will lead to a big problem down the road: What to do with all those lithium ion batteries once they've lost their oomph?

    It's the central question behind a pilot recycling project that Volkswagen Group plans to launch at a factory in Salzgitter, Germany, about 30 miles from its global headquarters in Wolfsburg. Beginning in 2020, the plant will accept about 1,200 tons of used automotive lithium ion battery packs a year—the equivalent of what's in about 3,000 EVs today.

    The battery packs will be analyzed and sorted; those with some life left will be given a second use, such as mobile vehicle charging stations similar to the way a power pack can be used to recharge a cellphone. Batteries that are spent will be shredded and ground to a fine powder, Volkswagen says, so their valuable and rare raw materials—including lithium, cobalt, manganese and nickel—can be extracted and sorted for use in new battery packs.

    Volkswagen believes that, within 10 years, it will be able to recycle up to 97 percent of all the raw materials used in the battery packs driving its upcoming EVs. It expects the pilot project to help it reach 72 percent, up from 53 percent today.

    Thomas Tiedje, Volkswagen's head of technical planning, said the auto maker has spent 10 years researching how best to recapture the valuable minerals used to make modern batteries.

    "We already have sustainable battery expertise in the Group and are developing this further," Tiedje said in a statement.

    One more spin: Volkswagen's pilot EV battery recycling plant in Germany will test whether cells are still useful or should be recycled.

    While the pilot plant is ramping up in Germany, the company has not determined plans for battery recycling in North America after it begins selling EVs here this year with the Audi e-tron and in 2020 with the Volkswagen I.D. Crozz. "We are in regular contact with our colleagues in (North America) about recycling," a spokesman said.

    Today's lithium ion battery packs have an estimated useful first life of about 150,000 miles, or roughly 10 years, given average driving cycles. In Europe and in China, auto makers are required to pursue end-of-life strategies for their products, especially those containing materials that are hazardous to the environment. In the U.S., however, similar recycling research efforts are in their infancy, though the nation's largest EV maker, Tesla, last year said it is working toward a closed-loop battery recycling process at its Gigafactory battery-production locations.

    Playing catch-up

    In February, the U.S. Department of Energy launched a three-year, $15 million effort to industrialize the recycling of lithium ion EV batteries. The ReCell Center, at Argonne National Laboratory in suburban Chicago, will coordinate research with auto makers, material and battery suppliers, and several universities with the aim of using recycled materials to drive down the cost of EV batteries by 10 to 30 percent, to a goal of $80 per kilowatt-hour.

    "We're trailing the other countries," Jeffrey Spangenberger, the center's director said. "There aren't many lithium ion battery recyclers in the U.S., so work needs to be done to catch up."

    Spangenberger said ReCell's efforts will be focused on "trying to increase the value of the materials coming out of the (battery recycling) stream. A lot of the processes that are used currently recover low-value materials. We're trying to find ways to get the materials back that can make more money," including cobalt, nickel and lithium.

    Reusing the good stuff: Once a battery is no longer useful, it is shredded and dried, with most of the expensive minerals recovered so that they can be reused to make future cells.

    In addition to guiding battery recycling efforts, the research will focus on three areas:

    1. Direct cathode recycling to develop processes that generate products to go back into new batteries without the need for reprocessing.
    2. Recovery and recycling of other battery materials that can be resold for a second use, providing an additional source of revenue.
    3. Design for future batteries to optimize the recapture and recycling of raw materials.

    A big problem fast

    The scope of global automotive lithium ion battery recycling is expected to grow fairly quickly into a huge issue. The International Energy Agency predicts that the number of EVs on the world's roads could grow from about 2 million today to as many as 140 million by 2030. Volkswagen believes it will sell as many as 15 million battery-electric vehicles globally by 2025.

    In addition to all those extra EVs, higher-powered fast-charging increases the battery degradation rate by as much as 400 percent, Asad Farid, an analyst at Berenberg Thematics, told the Advanced Automotive Battery Conference in Strasbourg, France, in January. That means all those quick-charging EVs will need new battery packs sooner than 10 years. Berenberg estimates that by just 2022, as many as 262,000 metric tons of automotive lithium ion batteries will need to be recycled.

    "The car manufacturers have an upcoming problem, and one that we are already starting to see—this massive volume of batteries," Johan Stjernberg, CEO of Box of Energy, a Swedish company working with Porsche and Volvo Cars, told Bloomberg last year.

    "The market will be enormous for second-life applications with storage."

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