What are the necessity of aging test for lithium battery pack?

How to quickly judge the aging degree of lithium battery pack? If you have a multimeter, you can check the quality of the lithium battery pack in one minute. The method is: find 3 to 5 power resistors of 1 ohm and 10W in series. After connecting, string on the battery and measure the battery flow. How much, generally adjusted to 500mA, if you want to buy a battery, you can connect this load to the positive and negative poles of the battery, and then measure the voltage drop of the battery, that is to say, measure the voltage before connecting the resistance. Measure the voltage after connecting the load. The smaller the difference between the two voltage values, the larger the battery capacity and the stronger the load capacity. Why do lithium battery packs need to be tested for aging? One is to make the electrolyte infiltration better, which is conducive to the stability of the performance of the lithium battery; the other is that the active materials in the positive and negative materials can accelerate the progress of some side-uses after aging, such as Gas production, electrolyte decomposition, etc., make the electrochemical performance of lithium battery packs quickly stabilized; the third is to screen the consistency of lithium battery packs after aging for a period of time. After formation, the voltage of the battery cell is unstable, and its measured value will deviate from the actual value. The voltage and internal resistance of the battery cell after aging are more stable, which is convenient for screening batteries with high consistency. The performance of the battery after high temperature aging is more stable. Most lithium battery manufacturers adopt high temperature aging operation mode during processing, and the temperature is 45~50 degrees Celsius for 1 to 3 days, and then put it aside at room temperature. Potential undesirable phenomena of the battery will be exposed after high temperature aging: for example, voltage changes, thickness changes, and internal resistance changes all directly test the comprehensive indicators of the safety and electrochemical performance of these batteries. 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 factors that influence the internal resistance of UPS power batteries?