Akademik Veri Yönetim Sistemi
7th International Eurasian Conference on Biological and Chemical Sciences, Ankara, Türkiye, 2 - 04 Ekim 2024, ss.48
Lithium-ion batteries are of great importance for electric vehicles owing to their high energy density, power density, and long cycle life. However, the thermal behavior of lithium-ion batteries restricts their use in electric vehicles. Therefore, investigation of the thermal behavior of lithium-ion batteries is necessary to achieve robust battery thermal management systems. In this study, the thermal behavior of a 26650 cylindrical lithium-ion battery was numerically examined to determine the effect of the convective heat transfer coefficient (CHTC) on maximum battery temperature, minimum battery temperature, and temperature homogeneity. The thermal behavior of the lithium-ion battery discharged at 3C-rate and 300 K free stream temperature was obtained by applying the NTGK model. The highest maximum and minimum battery temperatures were 342.651 K and 340.172 K respectively when the CHTC was 10 W/m K. The lowest maximum and minimum battery temperatures were 324.602 K and 319.739 K respectively when the CHTC was 40 W/m K. As expected, both maximum and minimum battery temperatures decreased with increasing the CHTC. Similarly, the temperature homogeneity decreased with increasing the CHTC. A linear change was observed for the maximum battery temperature while an exponential change was determined for the minimum battery temperature. Applying the CHTC at 40 W/m K was recommended for a lower maximum battery temperature and to achieve temperature homogeneity in limit values.