High power performance of battery modules requires maintaining lower operating temperature and dissipating large amount of heat generated from the chemical reaction inside the battery. The high heat generated causes increase the battery temperature which leads reduce the battery performance and life cycle. Therefore, an efficient cooling system in battery modules is needed to ensure the safe and long-lasting operation conditions. In this work, thermal management cooling system using heat sink, perforated heat sink and series configurations of dimples which are circular, elliptic, and cylindrical were performed. The single battery made for Li-ion that provide constant power while the positive and negative tabs made from lead lithium respectively. The working fluid is air where the flow was analyzed at low Reynolds number to ensure the laminar flow regime. The perforated sink is conducted using circular hole along the fins where the air enters the perforation at same Reynolds number entering the channel. To investigate the effect of dimple's shape, the dimples assumed to have same volume. The results show that, the battery temperature reduced significantly using air conventional heat sink. Using perforated heat sink slightly decreased the battery temperature and small increase in Nusselt number obtained compared to conventional heat sink. In addition, the influence of dimple shape on thermal performance of heat sink and battery temperature investigated. The cylindrical dimples reduce the battery temperature by 1.5 °C compared with conventional heat sink without dimples. Including perforated heat sink with dimples leads to decrease the battery temperature by 3 °C at same conditions. The shape of dimples has a slight effect on thermal performance of heat sink and battery temperature.