Why does the capacity of lithium iron phosphate batteries decline?

Reasons for the capacity degradation of lithium iron phosphate batteries 1. The internal resistance of lithium batteries, especially the inconsistency of the internal resistance of polarization, causes the voltage of individual batteries to change drastically during the charging and discharging process, resulting in drastic changes in the entire battery pack. 2. The inconsistency of the voltage of the single ultra-thin battery will affect the peak shaving ability of the battery and reduce the energy released by the overall lithium iron phosphate battery. 3. Due to the heat release and heat absorption process of the ultra-thin battery, the battery temperature will continue to change. When overheated, it will bring performance degradation and safety hazards. Facts have proved that the electric vehicle operation and test fires that have occurred in recent years have led to fire The cables are all caused by the inadequate over-temperature protection to cause the battery to heat up and fire. The battery types include not only lithium manganate, but also lithium iron phosphate batteries. 4. Capacity is the most serious factor in discreteness. Inconsistent capacity can cause performance problems in two aspects. One is that some lithium iron phosphate batteries will be overcharged and overdischarged, leading to unsafe factors such as combustion and explosion, and the other is low. Because the capacity single battery ends work early, the energy of other single batteries in the entire ultra-thin battery pack cannot be fully released, which causes the life of the entire lithium iron phosphate battery to decay. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.