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Is DC fast charging harmful to your electric vehicle battery?
The ability of electric vehicles to accept higher charging current is affected by the chemical composition of the battery. The accepted view in the industry is that the faster the charging speed is, the faster the battery capacity of electric vehicles will decline. However, a study conducted by the Idaho National Laboratory concluded that although the battery of electric vehicles would deteriorate faster if it was only charged at three levels (almost never), the difference was not particularly significant.
INL tested two pairs of electric vehicles in the 2012 model year, after all four test vehicles had driven 50000 miles, the battery capacity of the second class vehicles decreased by about 23%, while that of the third class vehicles decreased by about 27%. The average endurance of the Leaf in 2012 was 73 miles, which means that there is little difference between these figures.The point here is that although DC charging may affect the battery life of electric vehicles, it should be the smallest.
