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Influencing Factors And Optimization Of Storage Battery Dispersion

Influencing Factors and Optimization of Storage Battery Dispersion
Storage Battery in the group process, due to the lithium battery itself constitutes a slight difference between the material and the level of different groups of processes, lithium batteries will be used and placed in the process of performance inconsistencies, which is Storage Battery discrete phenomenon, The quantization index describing this discrete phenomenon is the dispersion, which is obtained from the function of several parameters. The main factors that cause the change of the dispersion are: resistance, voltage, capacity, temperature and so on.
1, the battery resistance, especially the internal resistance of the inconsistency, making the individual battery charge and discharge process voltage changes violently, resulting in dramatic changes in the entire battery pack; 2, the battery voltage is inconsistent, will affect the battery 3, due to the battery work in the heat and endothermic process, the battery temperature will continue to change, when the overheating, will bring performance degradation and security risks, it turns out that in recent years, the battery has been able to reduce the energy consumption of the battery, The occurrence of electric vehicle operation and test fire fuse is because the over-temperature protection is not in place cause the battery fever, the battery type not only lithium manganese oxide, iron phosphate Storage Battery is also true; 4, the capacity is the most serious dispersion Of the factors, the capacity of the main differences caused by two aspects of the performance problem, one part of the battery will be in the overcharge and over discharge state, resulting in burning, explosion and other unsafe factors, and second, low-capacity single battery because of the early end of the work, affecting the whole The energy of other single cells in the battery pack can not be completely released, causing the battery pack to degrade the life of the entire battery pack.
In order to reduce the negative impact of Storage Battery dispersion, it is necessary to meet the requirements of battery pack uniformity and to improve from the following production and use.
1, the production process, Storage Battery design to ensure that meet the requirements of large-scale mechanized production, to find ways to control the quality of the product process to ensure that the single cell in the material and internal structure of the uniformity.
2, the use of the first to optimize the sorting matching technology, making the Storage Battery group in the initial consistency to be satisfied; followed by weakening the internal temperature of the battery imbalance, so that the current density as uniform as possible to reduce the battery contact resistance connection The
3, test the battery surface temperature and flow rate, select a reasonable and scientific ventilation structure, so that the entire battery surface temperature uniformity, to ensure that the battery pack when using each battery in the same temperature environment.
Poor battery consistency is difficult to grasp the process of manufacturing the battery pack, the current control methods are not perfect, but the Storage Battery dispersion to enhance understanding to improve the consistency of Storage Battery is necessary, but also do the basis of this matter The
Storage Battery security is always an important issue that caters to the industrialization of Storage Battery. In recent years, battery explosion accidents have been caused by the use of Storage Battery, compared with other types of batteries, which are made up of Storage Battery materials and processes The special nature of the decision. All of the Storage Battery explosion is caused by short-circuit caused by the battery heat, and cause short-circuit reasons there are overcharge, over discharge, positive and negative direct docking, electrolyte leakage. The best way is of course to have a battery-protected circuit board design. Although this will increase the manufacturing cost of Storage Battery, but for the safe use of Storage Battery is necessary, all the regular Storage Battery manufacturer's products are inevitably the design.

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