"The world's largest-ever electric vehicle winter test just concluded in China, and the results show just how extreme cold punishes driving range. Chinese EVs dominated the rankings, but one American and one Japanese model still cracked the top ten. The test was conducted by Autohome, China's largest automotive media outlet, which drove roughly 67 new EVs and hybrids to Yakeshi, Inner Mongolia. There, about 100 car experts subjected the vehicles through rigorous tests to examine their range, charging performance, driveability on icy surfaces, acceleration."
"The thing is, EV batteries are simply not at their happiest when the mercury drops. Batteries do not like to be cold. Modern EVs are still engineered to survive extreme cold, with sophisticated thermal management systems and broad operating temperature windows, but today's lithium-ion chemistry still has inherent limitations. Those limits showed up most clearly in reduced driving rangeas the car has to expend a large portion of its energy just heating up its own battery."
Chinese automotive experts drove 67 cars, mostly EVs and hybrids, to Yakeshi, Inner Mongolia, for winter evaluations in temperatures between 14°F and −22°F. About 100 car experts subjected the vehicles to rigorous assessments of range, charging performance, driveability on icy surfaces, acceleration and safety. Chinese EVs largely outperformed several Tesla models, though a Tesla sedan still placed in the top ten for range retention. Cold substantially reduced battery efficiency because lithium-ion chemistry loses performance at low temperatures and vehicles must expend energy to heat batteries. Nearly every vehicle lost a large portion of manufacturer-rated range, with most losing more than half.
Read at insideevs.com
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