Lithium-ion batteries for electric cars may last far longer than we've been led to believe, a battery expert told the American Chemical Society in a speech this week.
Mikael Cugnet of the French Atomic Energy Commission said current estimates of an eight-year lithium-ion life have been based on accelerated tests that don’t necessarily provide an accurate picture of how long the batteries will really last in electric cars and hybrids. He believes that if managed properly, EV battery packs could operate reliably for 15 years, and possibly as long as 20 years.
"The accelerated testing that’s performed in labs is not exactly representative of what will happen during real road use," Cugnet told Design News. "Accelerated testing is usually performed at much higher temperatures and in a much shorter time period than you’d see in real-life use. That’s why people are getting such low values."
Phoenix weather has always been hard on car batteries. That statement could be ammended to say "EV battery packs could operate reliably for 15 to 20 years except where it really hot like Phoenix, Arizona".
Well that depends on if there is an active battery thermal management system, like the one on the volt which can heat or cool the battery pack... Active thermal management will definitely extend the life if you live in either extreme heat or cold climates.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.