Elucidation of the reasons for the deterioration of lithium-ion batteries

Simply put, the deterioration of lithium-ion batteries in electric vehicles can be attributed to changes in their internal chemical identity. Someone once suspected that a part of the deterioration of the battery was caused by the physical damage of the battery, such as the loosening of the pole. However, these extreme physical damages generally cause damage to the battery rather than deterioration of the battery. Deteriorating lithium-ion batteries are generally experienced in long-term cycles, high temperature storage, and other extreme conditions. The electrolyte in the battery will produce side effects during the process and the electrode material is unpredictable, showing various gases; battery experience The difference in the process of the gas production, the difference in the reverberation system, and the difference in the paradigm of the side reverberations lead to differences in the final gas production paradigm and other ratios. The degradation level of lithium-ion batteries is affected by many factors such as the situation, charging and discharging characteristics, and often cannot reach the cyclic life value claimed by the supplier. Changing too early will cause huge economic losses, and too late will affect the reliability of the system. The charging and discharging processes of electric vehicle lithium-ion batteries correspond to specific oxidation and reduction reverberations, and such reverberations are reversible during the charging and discharging processes. The so-called secondary reverberation refers to the reverberation in the battery other than the above normal oxidation and reduction reverberation. Such reverberation is generally irreversible, and it is also undesirable for us. The deterioration of lithium-ion batteries in electric vehicles can be attributed to changes in their internal chemical identity. Someone once suspected that a part of the deterioration of the battery was caused by the physical damage of the battery, such as the loosening of the pole. However, these extreme physical damages generally cause damage to the battery rather than deterioration of the battery. With the deterioration of lithium-ion batteries for electric vehicles, SEI will continue to thicken. In the process of deterioration, the divergence of battery internal resistance will increase, and the divergent internal resistance will cause the difference between the battery and the battery. The unevenness of the internal fever between the two causes the unevenness of the secondary reverberations and further aggravates the ambiguity of the internal resistance. 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: What are the correct charging methods for lead-acid batteries?