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 donít 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 thatís 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 youíd see in real-life use. Thatís why people are getting such low values."
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