Several Key Factors Affect The Cycle Characteristics Of Lithium Ion Batteries

First, environmental humidity.

Too much water will cause adverse reactions of positive and negative active substances, destroy their structures, and then endanger the circulation system. In addition, too much water is also bad for SEI membrane. However, although trace elements in water are difficult to be removed, trace element water can ensure the characteristics of lithium battery cells to a certain extent.

Second, positive and negative compaction.

High positive and negative compactness can improve the specific energy of lithium battery cells, but also reduce the circulating system characteristics of raw materials to a certain extent. According to the basic theory analysis, the higher the compactness, the greater the damage to the structure of raw materials, and the structure of raw materials is also the basic guarantee for the application of lithium battery recyclable system.

Third, objective cause test.

External factors such as battery charging rate, cut-off voltage, battery charging cut-off current, overcharge and power loss during detection, temperature of detection room, sudden termination during detection, contact internal resistance between test case and lithium battery cell, etc. will more or less endanger the functional test results of the circulating system,

Fourth, there are too many negative stages.

In addition to the first (secondary) irreversible volume and the high relative density of the coating due to too many negative levels, considering the harm of the characteristics of the circulating system, it is common that the negative high-purity graphite becomes a "weak point" in the whole process of the circulating system for the lithium cobalt battery plus the high-purity graphite system software. If the negative levels are too many and insufficient, it is very likely that the lithium battery has not carried out lithium precipitation in front of the circulating system, but after countless times of the circulating system, The positive optical structure has undergone a great change, so it is impossible to completely accept the lithium iron phosphate produced by the positive stage, and then carry out lithium precipitation, resulting in the volume reduction too early.