What are the factors that affect the service life of lead-acid batteries and UPS lithium battery packs?

Factors affecting the service life of lead-acid batteries: ⒈Temperature temperature has a greater impact on lead-acid batteries, too high or too low will cause the battery life to decline, especially high temperature, the impact on battery life is particularly clear. Generally speaking, the ambient temperature should be controlled at about 25°C. ⒉Depth of discharge The depth of discharge has a great influence on the service life of lead-acid batteries. The greater the depth of battery discharge, the less the number of cycles, so you should try to beware of deep discharge when using it. Small current discharge can easily cause deep discharge. ⒊Float charging voltage Since the UPS battery is a standby mode of operation, the mains is in a charging state under normal conditions, and it will only be discharged when the power fails. In order to prolong the service life of lead-acid batteries, the float voltage must be set reasonably. If the float voltage is too low, it will lead to insufficient charging and irreversible sulfation of the negative electrode of the battery; if the float voltage is too high, it will accelerate the loss of water and the corrosion of the positive plate. 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 continuously complete the lithium insertion and removal. On the other hand, it may be that the active material and the corresponding electrolyte cannot form a dense and average 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. Decomposing theoretically, the greater the compaction, the greater the damage to the structure of 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 excessive, the UPS lithium battery pack may not release 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 three main reasons for the impact on the cycle life of lithium battery packs. 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 over compacted. The resulting immersion liquid is insufficient, and the third is that the electrolyte inside the battery 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 article: Why are drone batteries expensive?