Why Should the Battery Pack Have the Aging Test

First, in order to make the electrolyte soak better, which is conducive to the stability of the lithium-ion battery pack’s performance.

Second, after aging, the active substances in the positive and negative materials can promote the acceleration of some side uses, such as gas production and electrolyte decomposition, so that the electrochemical performance of lithium-ion battery pack can quickly reach stability;

The third is to screen the consistency of lithium-ion battery pack after aging for a period of time. After formation, the voltage of the cell is unstable, and its measured value will deviate from the actual value. After aging, the cell voltage and internal resistance are more stable, which is convenient to screen batteries with high consistency.

The battery performance after high-temperature aging is more stable. Most lithium-ion battery manufacturers adopt the high-temperature aging operation mode in the production process, aging at 45 ~ 50 ℃ for 1 ~ 3 days, and then put it aside at room temperature. After high-temperature aging, potential adverse phenomena of batteries will be exposed: for example, voltage change, thickness change and internal resistance change are comprehensive indicators that directly test the safety and electrochemical performance of these batteries.

Temperature has a great influence on the cycle aging rate of lithium-ion battery pack. At lower temperature, the cycle life is reduced due to strengthened lithium elemental electroplating. Too high temperature shortens the battery life due to the aging reaction of the driver. Therefore, the best cycle life of lithium-ion battery pack can be obtained only at an appropriate temperature.

Acey new energy is a professional supplier of lithium battery aging test machine.