A recent study published in the journal NatureMaterials showed that the damage caused by fast charging to the battery pack was much lower than we expected. In terms of battery pack protection, it should be more concerned with the distribution of current between the electrodes, rather than the fast charging itself. Research teams from Stanford University and the Stanford Materials Science Center focused their research on the performance of lithium iron phosphate cathode materials.
The researchers first made a batch of coin-type batteries, then charged them with different current sizes and different charging time lengths, and finally disassembled them, and then observed the chemical reaction by X-ray. If a higher proportion of nanoscale particles on the cathode can absorb and release ions during charging and discharging, the battery has a longer service life; if only a small number of particles function, it means that the battery performance is greatly attenuated.
After testing the battery, the researchers found that only a small percentage of nanoscale particles can absorb and release ions, whether or not they use fast charging technology. However, above a certain threshold, the distribution of ions becomes more balanced. Scientists will be able to use this feature to create a more durable battery pack.
The next phase of the research will process the battery for hundreds of charge and discharge cycles to simulate how the battery will be used under real conditions to further test its performance characteristics. The researchers also plan to perform X-ray inspection during battery charging to better understand the performance of the electrode material.
The number of DC fast charging stations is increasing, and electric vehicle users are inevitably continuing to use these devices, but now they may be more comfortable when using them, without worrying too much about the damage to the battery pack.
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