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Factors affecting the life of 18650 lithium battery

Time:2021-01-12 Views:105

  18650 lithium battery customization generally contains too many elements of lithium battery customization. The analysis of cylindrical lithium battery customization technical solutions belongs to the general scope of lithium battery customization. So, is it true to analyze the reasons that affect the life of 18650 lithium battery? Look at the following reasons that affect the life of the 18650 lithium battery.

Factors affecting the life of 18650 lithium battery

  Analysis of the impact of 18650 lithium battery on life when customized

  1. Many factors

  The 18650 lithium battery charge-discharge cycle process is a complex physical and chemical reaction process, and its cycle life influence factors are various. On the one hand, it is related to the characteristics of the battery itself, such as the design, manufacturing process, and material performance degradation; on the other hand, it is related to the external influence of the battery during use, such as the use environment and the charging and discharging system.

  2. Application scenarios

  2. With the development of science and technology and the maturity of technology, the customized applications of 18650 lithium batteries are becoming more and more extensive. The faster the battery capacity decays under the same conditions, the relatively poorer battery quality. 18650 lithium battery has the advantages of high cell voltage, relatively light weight, and environmental friendliness, but after multiple cycles of charge and discharge cycles, performance such as battery capacity will decrease. The cycle performance of 18650 lithium battery is an important indicator to measure its quality, and many standards for 18650 lithium battery have cycle life.

  3. Introduction to the customized structure and principle of 18650 lithium battery

  Before the 18650 lithium battery was customized, it was first understood that a passivation film can be formed on the interface between the negative electrode and the electrolyte during the charging and discharging process of the battery. It acts as a diaphragm between the electrode and the electrolyte. It is an electronic insulator but an excellent conductor of lithium ions. Lithium ions can be freely inserted and extracted through the passivation layer. It has the characteristics of a solid electrolyte, so this passivation film It is called "solid electrolyte interface membrane", or SEI for short. The 18650 lithium battery customization is mainly composed of positive and negative materials, electrolyte, separator, current collector and battery shell. The positive and negative materials are composed of two different lithium ion intercalation compounds. When charging, lithium ions are extracted from the positive electrode and inserted into the negative electrode through the separator through the electrolyte. The opposite is true when discharging.

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