The purpose of this study is to provide a comprehensive evaluation of the aligned and staggered cell structures of air-cooled battery thermal management systems (BTMS). The goal is to ascertain how cell structure affects maximum temperature rise, temperature uniformity, and energy demand of battery packs. Computational fluid dynamics (CFD) method is employed to determine the BTMS flow field and temperature field, for various test cases with ambient temperatures of 290, 300, and 308 K and inlet airflow velocities of 1.5, 1.0, and 0.5 m/s, respectively. In every case, it was observed that the temperature increased as the longitudinal distance increased. The numerical analysis shows that the maximum air velocity and the standard deviation of air velocity within the battery pack are directly related to the maximum temperature difference and the extreme temperature. More so than with an aligned battery cells arrangement, the staggered battery cells configuration results in a lower maximum temperature and better temperature uniformity across the battery pack. Furthermore, in comparison with an aligned cell arrangement, a staggered pack is more energy efficient.