What factors affect the cycle life of UPS lithium battery packs?

Factors affecting the cycle life of UPS lithium battery packs: 1. Material types The choice of materials is the first element that affects the performance of lithium battery packs. The cycle performance of the material is poor. On the one hand, it may be that the crystal structure changes too fast during the cycle to continue lithium insertion and removal. On the other hand, it may be that the active material and the corresponding electrolyte cannot form a dense and uniform SEI film, which causes the active material. Premature side reactions with the electrolyte will cause the electrolyte to be consumed too quickly and affect the circulation. 2. Positive and negative electrode compaction The positive and negative electrode compaction is too high, although it can increase the energy density of the lithium battery UPS, it will also reduce the cycle performance of the material to a certain extent. From a theoretical analysis, the greater the compaction, the greater the structural damage to the material. 3. Excessive moisture Excessive moisture will cause side reactions between the UPS lithium battery pack and the positive and negative active materials, destroy its structure and affect circulation. At the same time, excessive moisture is not conducive to the formation of SEI film. 4. Coating film density. The inconsistency of film density will either bring about a difference in capacity, or a difference in the number of battery core windings or laminated layers. For lithium battery packs of the same model, capacity, and material, reducing the film density is equivalent to adding one or more layers of winding or lamination. The new diaphragm can absorb more electrolyte to ensure circulation. ⒌Excessive negative electrode If the negative electrode is excessively insufficient, the UPS lithium battery pack may not precipitate lithium before cycling, but the structure of the positive electrode changes little after hundreds of cycles, but the negative electrode structure is seriously damaged and cannot completely receive the lithium ions supplied by the positive electrode. Lithium causes the capacity to drop prematurely. 6. Electrolyte amount Insufficient amount of electrolyte has an important impact on the cycle life of lithium battery packs for three reasons. One is insufficient injection volume, and the other is that although the injection volume is sufficient, the aging time is not enough or the positive and negative electrodes are too high due to compaction. Insufficient immersion is caused, and the third is that the electrolyte inside the cell is consumed with the circulation. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the classifications of lithium air batteries?