Abstract
In this paper, a cooling chamber of a 9 Li-ion battery pack is numerically investigated. The effect of the outlet location is studied when the inlet is fixed and changing the outlet location varies. The battery has a cylindrical shape, and the air is used as the working fluid. This study is performed for three different Richardson numbers (Ri) in the presence of forced, natural, and mixed convection flow using six different models of the air outlet. The COMSOL commercial software is employed. Changes in the outlet and inlet location of the flow have a significant effect on the rate of heat transfer and pressure drop. The results show that model 5 has the lowest and model 1 has the highest amount of pressure drop (DP). Enhancing the Ri increases DP in models 1 to 4 and decreases DP in models 5 and 6. The highest temperature of the battery pack cooling chamber corresponds to model 2, and the lowest one is related to model 6. In the Richardson 100, the Model 2 has a 41.8% higher pressure drop than the Model 5. Increasing Ri also reduces air outlet temperature for all models except model 5. Models 6 and 1 have minimum and maximum T-Ave, respectively. They have TBPMax. Models 6 and 1 have maximum and minimum Nu(Ave) of the battery pack, respectively. Increasing the Ri reduces the maximum and T-Ave of the battery pack for all models except model 2.