Lithium-ion batteries are one the significant energy storage devices today as their capacity is more than NiCd and Lead-acid batteries. These batteries are utilized to storage electrical energy and it can contribute to decreasing air pollution since it can be used in vehicles instead of fossil fuels and as a result, there would be no CO2, NOx, SOx, or other pollutants released from vehicles. Numerous studies have been done to improve the performance of Li-ion batteries. However, there are several factors that can affect these batteries' efficiency. Studying the effect of each parameter’s effect on the performance of the battery is costly and time-consuming experimentally. Computational modeling and simulation can help researchers to investigate the influence of each of these parameters in various situations. COMSOL Multiphysics is software that makes this process easier as it is user-friendly software with some useful features like containing different physics equations, designing the geometry of batteries in 1D, 2D, or 3D environment, and demonstrating results in understandable plots and attractive shapes. In this work, we investigated the discharge time of the battery in different temperatures with 2D simulated model of a Li-ion battery with 50 A/m2 as discharge Current density. The material of the positive electrode is LiMn2O4 and the electrolyte is LiPF6. The pores in electrodes are considered to be spherical. The results showed that the discharge time declines as the temperature of the battery increases but the distribution of lithium ion’s concentration in the battery is the same for different temperatures. For instance, the discharge time is 2100 S when the temperature is 273 ᵒK while it is 3400 S for T=350 ᵒK. This increase in discharge time maybe is related to the enhancement of the reactions inside the battery which are responsible for the movement of Li ions and the battery’s performance.
Anahtar Kelimeler: Lithium-ion batteries, Modeling, Simulation, COMSOL
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