Why does the battery require more temperature for charging than discharging?

Many companies’ battery products can complete normal discharge at low temperatures, but at the same temperature, it is more difficult to complete normal charging, or even unable to charge. When Li+ is embedded in graphite materials, the first thing to do is to desolvate. This process will consume a certain amount of energy. It prevents Li+ from dispersing into the graphite; on the contrary, when Li+ is released from the graphite material into the solution, there will be a solvation process, and solvation does not consume energy, and Li+ can quickly release the graphite. Therefore, the charge acceptance capability of graphite materials is clearly inferior to the discharge acceptance capability. In a low temperature environment, there is a certain risk of battery charging. As the temperature drops, the kinetic characteristics of the graphite negative electrode become worse. During the charging process, the electrochemical polarization of the negative electrode is clearly intensified. The separated metal lithium simply forms lithium dendrites, breaking the barrier and leading to the positive and negative electrodes. Short circuit. Try to be wary of lithium batteries charging at low temperatures. When the battery has to be charged at low temperature, it is necessary to choose a small current (ie slow charge) to charge the lithium battery as much as possible, and place the lithium battery adequately after charging, and then ensure that the metal lithium separated from the negative electrode can react with the graphite. Re-embedded inside the graphite anode. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Introduction to the lithium battery processing process