How to distinguish the consistency of lithium battery pack monomers?

How to judge the consistency of lithium battery packs? First of all, we need to know what the consistency of lithium battery packs refers to. The consistency of a lithium battery pack refers to the convergence of a group of important characteristic parameters of lithium batteries. The consistency of a battery refers to the consistency of the weight and voltage of the battery. There are multiple strings of cells in the same battery pack. Each parameter is best. All are in a smaller range, which is good for consistency. How to quickly judge the consistency of lithium battery pack monomers? The consistency of lithium battery pack monomers should be judged by using special tools to measure capacity, internal resistance, and charge and discharge curves. This requires a single measurement of the capacity, internal resistance and discharge platform of a single battery, as well as the process level of lithium battery packaging, and the battery performance requirements of specific products. How to control the consistency of lithium battery packs? At present, the industry generally uses battery management systems to control the consistency and safety of the batteries in the lithium battery packs, thereby protecting the battery packs and prolonging the service life of the products. The use of a battery management system (BMS) can realize the control of the relative consistency of the battery, thereby preventing the overcharge and overdischarge that may be caused during use due to the inconsistent battery, and relatively prolong the service life of the battery pack. The battery management system with equalization function addresses the inconsistency of battery packs to a certain extent, and maximizes battery pack capacity and energy utilization. What are the problems of inconsistency of lithium battery packs? If inconsistent batteries are used in series and used together, the following problems will occur: 1. Capacity loss, the battery cells form a lithium battery pack, and the capacity conforms to the barrel principle, the worst one The capacity of the battery cell determines the capacity of the entire battery pack; 2. Life loss, a small-capacity battery cell is fully charged and discharged every time, and the output is too strong, which is likely to reach the focus of life first. When the battery cell's life ends all the time, a group of battery cells welded together will die. 3. The internal resistance increases, the same current flows through different internal resistances, and the cells with large internal resistance generate more heat. The battery temperature is too high, causing the deterioration rate to accelerate, and the internal resistance will further increase. Internal resistance and temperature rise form a pair of negative feedback, which accelerates the deterioration of high internal resistance cells. 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: What are the important repair methods and common faults of the lithium battery protection board?