Transient Thermal Analysis on Li-ion Battery Pack used for Evs using Comsol

Lithium-ion (Li-ion) batteries stand out as a promising power source for electric and hybrid vehicles due to their high energy capacity, minimal self-discharge, lightweight nature, durability and absence of certain drawbacks. However, the substantial heat they generate can obstruct the performance and pose safety risks. Therefore the prediction of temperature developed on the cell surface is most important. The objective of the research is to predict the temperature developed on each cell of Lithium-ion battery pack using COMSOL multi physics software. The battery pack is designed and developed to produce 0.384 kW power during the discharge. The acquired experimental data from the tests is employed to create a graph illustrating the relationship between voltage and temperature. Three dimensional model of the battery pack was created and tetrahedral mesh was created for computational analysis. The battery pack is anticipated to reach a peak temperature of 62°C, and a rapid decline in voltage during discharge is observed between the 0.1 to 0.15-hour timeframe. It was noticed that The temperature is supposed to rise by 13.6 degrees Celsius as the battery voltage decreases from 23.7 V to 10.7 V.