What are the reasons for the aging test for lithium battery packs?

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 the connection is completed, measure the battery flow on the battery in series. How much, generally adjusted to 500 mA, if you want to buy a battery, then you can connect this load to the positive and negative electrodes 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 more good, 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 are aged, which can promote the acceleration of some side-uses, 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 the formation, the voltage of the cell is unstable, and the measured value will deviate from the actual value. The voltage and internal resistance of the 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 the processing process, and the temperature is 45~50 degrees Celsius for 1~3 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 directly test the comprehensive indicators of the safety and electrochemical performance of this batch of 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 post: How to distinguish the advantages and disadvantages of dry batteries?