Optimized design of liquid-cooled plate structure for flying car power battery system

The high-rate discharge during takeoff and landing phases of a flying car poses new challenges for the battery cooling system. Battery overheating can affect the performance and lifespan of the battery and may even lead to fires. This article focuses on the optimization design of liquid cooling plate structures for battery packs in flying cars, specifically addressing the high power heat generation during takeoff and landing phases, and compares the thermal performance of four different structures of liquid-cooled plate BTMS (Battery Thermal Management Systems). Firstly, this article established a thermal model for the power battery module, and proposed a liquidcooled structure of BTMS with flow channels distributed on the battery cores. Under the same conditions, a comparative simulation analysis of the performance of four different BTMS structures was conducted in terms of cooling efficiency, energy consumption, etc., and an optimal liquid cooling plate structure design scheme suitable for flying cars was proposed. The simulation results indicate that compared to other channel structures, the spiral channel structure has the best overall performance, with the maximum temperature difference and maximum temperature controlled within a range of 31.1 degrees C and 4.8 degrees C respectively, and a weight of 163.7 g. Compared to the worst-performing channel structure, the spiral channel structure reduces the highest temperature, maximum temperature difference, and weight by 3.3 degrees C (9.6 %), 2.9 degrees C (37.7 %), and 10.8 g (6.2 %), respectively. It enhances the power density of the cooling plate and is the only optimal solution that meets the requirements for thermal management. Then, a more energy-efficient cooling fluid flow control strategy is proposed based on the cooling requirements at different stages. Compared to a constant flow rate of 0.9 m/s, this strategy reduces energy consumption by 43.4 %. This study provides a reference for future research on BTMS for flying cars.