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The safety of lithium-ion batteries lies in their thermal stability

by:dcfpower     2021-03-23
u003cpu003eIn today's society, the human science and technology level is in a stage of rapid development, but it will be restricted by the energy crisis in the development process, which requires the emergence of new energy sources. At present, lithium-ion batteries have been widely used as an important energy source. Whether in the field of electronic communication or transportation, it plays an extremely important role and has a wide range of application prospects. Lithium-ion batteries have many advantages, such as high specific capacity, long life, green and pollution-free. However, in the course of use, lithium-ion batteries also have some thermal safety issues, which also affects its wider promotion and use in more fields. u003c/pu003eu003cpu003eu003c/pu003eu003cpu003e Research has found that the cause of thermal runaway or even combustion and explosion of lithium-ion batteries is mainly due to the high current charging of the battery, or the severe impact or impact during use. Squeeze etc. Therefore, studying the thermal safety of lithium-ion batteries and analyzing the temperature distribution and changes of the battery during charging and discharging are very meaningful for predicting and evaluating the reliability of lithium-ion batteries and controlling their thermal safety issues. u003c/pu003eu003cpu003eu003c/pu003eu003cpu003e In the study, we need to understand the development trend of lithium-ion batteries and some problems in the application, especially the heating problems and safety caused by the abuse of lithium-ion batteries Make a certain analysis of hidden dangers. Next, we will study and study the classification, characteristics, working principle and composition materials of lithium-ion batteries, analyze the heating mechanism of lithium-ion batteries, and provide a theoretical basis for the temperature field analysis of lithium-ion batteries. Then combined with the classic theory of heat transfer, combined with the relevant knowledge of finite element, select the appropriate thermal analysis method, according to the actual application process, abstract the working process of the physical lithium ion battery and the heat problems encountered, Regularization, formulation, and a preliminary selection of a general, of course, is the thermal mathematical model of the Li-ion battery after proper assumptions and simplified processing. u003c/pu003eu003cpu003eu003c/pu003eu003c/pu003e
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