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

One is to make the electrolyte infiltration better, which is conducive to the stability of the performance of the lithium-ion battery pack; the other is that the active materials in the positive and negative materials can accelerate the progress of some side-uses, such as gas production, electrolyte decomposition, etc., after aging. Let the electrochemical performance of the lithium-ion battery pack quickly reach stability; the third is to screen the consistency of the lithium-ion battery pack after a period of aging. 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-ion battery manufacturers adopt high temperature aging operation mode during the production process. The temperature is 45~50 degrees Celsius for 1~3 days, and then it is left 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 this batch of batteries. Temperature has a great influence on the cycle aging rate of lithium-ion battery packs. Lower temperature reduces cycle life due to enhanced lithium elemental electroplating; excessively high temperature shortens battery life due to Arrhenius-driven aging reaction; therefore, lithium ion battery packs can only obtain the best cycle life under appropriate temperature . If you have a multimeter, you can check the quality of the lithium-ion battery pack in one minute. The method is: find 3 to 5 1 ohm, 10W power resistors in series. After connecting, string on the battery to measure the battery flow. How much is it, generally adjusted to 500 mA. 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 the load is connected. The smaller the difference between the two voltage values, the larger the battery capacity and the stronger the load capacity. 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: Analysis of the difference between aluminum-case lithium-ion batteries and soft-pack lithium-ion batteries