The investigation of battery thermal management via effects of using phase change materials in the oval packages around the lithium-ion battery cells with an airflow

Abstract

Due to the ability of phase change materials (PCM) in heat storage and thermal management system (TMS) of various devices, in this paper, the numerical study of the effect of using these materials on TMS of lithium-ion batteries was studied. There is also airflow in the battery pack (BAP) to control the battery temperature (T-B). Around the batteries, CaCl2.6H2O phase change agent was used in oval packages to control the T-B. A transient study performed for the time after melting, 100 %. PCM, which cools the airflow and CaCl2.6H2O at the same time as the battery is running, so that the amount of molten PCM is reduced so that the PCM can control the T-Bs again. The T-Bs was also monitored by establishing a space between the rows of batteries. The numerical analysis was carried out using the finite element technique and the COMSOL program. The findings revealed that the volume fraction (VLF) of PCM melt surrounding the batteries reduced with time. The decrease in melt PCM was significant in the first column but had little effect in the third column. Changing the vertical distance of the batteries from each other in the third column of batteries is very effective, while in the first column has little effect on the temperature and VLF of PCM. At a distance of 7 mm from the battery rows, there is the highest amount of T-B and molten PCM. The lowest T-B pack and molten PCM occurs at a distance of 9 mm from the battery rows.