Numerical evaluation of cooling heating system management performance in Lithium Ion batteries

Subject Areas : Heat Transfer

mohammad ali farajollahi ¹ ( M.Sc. Student of Mechanical Engineering (Energy Conversion) _Faculty of Mechanics, Electrical and Computer_Islamic Azad University, Science and Research Branch, Tehran, Iran )
Mohammad Hassan Nobakhti ² ( Department of mechanical engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran )
morteza khayat ³ ( Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, )

Received: 2021-04-09 Accepted : 2021-08-09 Published : 2021-11-04

Keywords: heat transfer, Lithium-ion battery, battery thermal management system, battery cell,

Abstract :

The main cause of failure and significant reduction in battery performance is a rise in temperature, so battery thermal control systems (BTMS) are built to monitor and optimize the thermal status of batteries. In this paper, two series and parallel arrangements for placing battery packs in electric vehicles with the same number of 17,280, 18650 battery cells are proposed and compared to select the best position for placing the battery packs. With the help of the Comsol program, the temperature change of the battery pack in the laminar fluid flow regime and the heat flux changes in the first 700 seconds of discharging the battery cells from the full charge mode and selecting the best design of the battery pack placement are compared. The maximum closed surface temperature of batteries is measured from the initial temperature of 27 degrees in series and parallel arrangement, respectively. The maximum temperature difference in the series of batteries is 10% different from the parallel arrangement. Also, by comparing the total heat flux, the better performance of the parallel arrangement compared to the arrangement of the battery series, makes this type of design a practical and more cost-effective priority than other designs.