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According to Fast Technology on August 26, lithium iron phosphate (LFP) batteries are currently very popular and are widely used in electric vehicles ranging from tens of thousands to millions. They have also spawned a large number of categories, and their charging speed has even surpassed that of ternary lithium.

Friends who pay attention to the industry may notice thatMany car manufacturers recommend charging LFP batteries to 100% regularly.For example, Tesla recommends once a week, while Ford recommends once a month.Helps maintain battery health and avoid performance degradation。

However, new research in the Journal of the Electrochemical Society suggests otherwise, showing that repeated charging cycles at higher states of charge could damage LFP batteries over time.

The researchers found that fully charging LFP batteries produces harmful compounds in the battery pack from the high voltage and temperature.Frequent cycling of the battery pack (i.e., fully discharging and recharging) causes these harmful compounds to deposit on the negative electrode, consuming the lithium, which leads to aging,“At higher states of charge, the voltage is higher and the cathode reaction inside the electrolyte accelerates, consuming the lithium stock.”

In addition, the study also stated that 0-25% charging cycles can extend battery life. Of course, no one would actually do this in actual use. After all, 25% of the battery is probably not enough to travel far, especially without a home charging station.

In fact, this study only considers the battery life, not the actual application, soElectric car owners don't have to worry about this issue in daily life., just use it correctly according to the manufacturer's instructions.