Lithium-ion battery packs are preferred in Electrical and Hybrid Vehicles (EVs and HEVs) due to their efficient and stable energy storage characteristics. Battery Thermal Management Systems (BTMS) have vital importance in EVs and HEVs to keep the batteries in desired temperature range to maximize performance and lifetime. Air cooling is a well-known method with the advantages of being simple and light but main concern for air cooling is effectiveness and pressure drops due to low heat capacity and thermal conductivity of air. This work compared various cooling designs for battery modules based on the surface temperature of batteries and the parasitic power consumption. Modules were built with COMSOL Multiphysics 5.5, and their accuracy was validated by experiments. Each module involves an equal number of batteries whose thermal characteristics were simulated by the electrochemical-thermal battery model, the P3D multiscale model. As a result, the maximum temperature was reduced by 5% (1.8°C) for inline alignment with baffles and 7.2% (2.8°C) for staggered modules, and the temperature gradient was reduced by 40% (1.7°C) for inline and 35% (1.5°C) for staggered alignments. While fan power consumption of inline alignment with triangle baffles (0.98W) was 3.5 times higher than the base design (0.27W), it was 0.23W for staggered design. Moreover, the cooling performance of different winglet parameters was compared and documented. Keywords: Battery Thermal Management Systems; P3D Model; Temperature Uniformity; Forced Air Convection; Cylindrical Lithium-ion Battery; Cooling Optimization; Winglets; Baffles; Cooling Efficiency.