Reasons for the deterioration of lithium batteries for electric vehicles

The aging of lithium batteries for electric vehicles can be attributed to changes in their chemical composition. It is also suspected that part of the reason for battery degradation is physically damaged batteries, such as loose rods. However, these extreme physical injuries usually result in battery damage rather than battery degradation. For the specific situation, the author of the subcontinent battery shell will discuss with you: the aging of lithium batteries for electric vehicles. The charging and discharging process of lithium batteries for electric vehicles corresponds to specific redox reactions, which are reversible during the charging and discharging process. The so-called side reactions refer to the reactions that occur in the battery other than the above-mentioned normal oxidation and reduction reactions. Such reactions are generally irreversible and undesirable. In addition, safety protection is an important function of the electric vehicle battery management system. In the working process of electric vehicle batteries, some working parameters are often set to ensure that the current is not too large or overcharged or overdischarged. However, these security parameters are not static. The state of charge (SoC), operating temperature, and deterioration of lithium batteries of electric vehicle batteries will all have an impact on battery performance. Whether lithium sticks to the electrode depends on the battery itself. It can be seen that in the process of deterioration, the inconsistency of the internal resistance of the battery will be aggravated, and the inconsistency of the internal resistance will lead to inconsistent internal heat between the battery and the battery, which will lead to inconsistent reactions and further aggravate the inconsistency of internal resistance. Finally, what the author wants to say is: the universality and particularity of the degradation mechanism of lithium batteries for electric vehicles. Different types of batteries have the same and different degradation mechanisms in different application environments. Some mechanisms are general and some are specific. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.