Mthematical Modeling Of Litihum Cobalt Oxide battery

Abstract

A two dimensional LiCoO₂ electrode model has been developed to simulate discharge of Lithium/Lithium Cobalt Oxide rechargeable battery. In order to analyze the internal electrochemical reactions of LiCoO₂ electrode, we used commercially available Computational Fluid Dynamics software, Fluent and used defined functions (UDF) code based C language. The model explains the transport of species and charge and variation of diffusion coefficient. The results for the discharge profile of species concentration and potential coincide with the previously developed LiCoO₂ model [1]. In order to understand the thermal run away of lithium battery, this model has been extended to three dimensional thermal abuse model. Different possible chemical reactions are counted for all Battery components. This three dimensional model has been used to explore the phenomenon that occurs inside of the lithium ion battery model under different temperature conditions. The three dimensional oven test simulation results have been described to study the effects of temperature, non uniformity and material distribution through a cell. The results show that thermal run away of battery heavily depends upon the behavior of electrochemical reactions which are taking place at different components of the battery. With the development of this model, we can save time and labor used for actual development of the battery.