The different applications of drones have expanded considerably in recent years. Advances in various technologies have made it possible to design drones with better functionalities, at a lower cost. However, it is still necessary to improve the efficiency of these aircrafts, which may be related to an improvement in the thermal efficiency of their electronic components. In this sense, the battery is found as the most critical element since the heat that it generates during high discharge rates, increases its temperature considerably. This condition usually compromises the capacity and long lifespan of the battery and can affect the safety of the flight. Faced with this problem arises the need to come up with a system that would be able to dissipate the heat generated. In this document, a quadcopter has been used as a study model, and a passive cooling system based on the principles of heat transfer has been proposed. The benefit of the proposed cooling system is that it would mean avoiding designing a system that consumes even more the battery capacity or increases the mass of the system. The proposal presented is based on building a thermal path to conduct the heat generated in the core of the battery to the environment by partially wrapping the battery with a thin flake of a good conductor material, such as graphite, so that the heat can be transferred to a heat pipe that is in contact with upper part of the fuselage. The upper fuselage of the drone stores the heat and transfers it to the environment through the convection of the air that surrounds the drone. The results obtained from simulations carried out in SOLIDWORKS, showed that the cooling system designed would effectively be capable of decreasing the battery temperature in 13 ºC at the cost of an increase in weight of 11.22 g. The fact that the weight gain would not present a relevant issue to the flight efficiency, would allow to state that this proposal has potential to answer to several problems related to the overheating of the battery.
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