Heat Dissipation Performance Analysis of Liquid-Cooled Plate in Battery Package System 2024-01-2674
A liquid-cooled plate is an important component for cooling batteries inside a battery package system. The structure of the liquid-cooling plate significantly affects the temperature conditions of power batteries and the energy consumption of the liquid-cooling system. However, there is a lack of precise knowledge regarding the specific factors that contribute to these impacts. In this study, the influence of structural parameters of flow channel on the heat dissipation performance is studied to solve above problems. A test bench for measuring battery pack cooling performances was built, and pressure drop of liquid-cooled plate and maximum temperature of battery were measured. A CFD model for liquid-cooled plate performance calculations was developed. Using the established model, pressure drop, and maximum temperature were calculated. The measured data are compared with the calculated date, which validate the proposed model. Using DOE with 3-factors 3-levels and using Analysis of Variance, the factors for influencing ‘S’-shaped liquid-cooled plate heat dissipation performance were analyzed. Prioritize the temperature characteristics of the liquid-cooled plate to get the best parameter combinations. Using the best parameter combinations of A3B1C3, a new liquid-cooled plate is designed. Under different discharge rates and inlet flow rates, the heat dissipation performance of initial liquid-cooled plate and the new designed liquid-cooled plate is compared. The calculation results show that the volume of channel and the length of channel have a great influence on the flow resistance. The length of the channel has a great influence on temperature uniformity. The length and the aspect ratio of channel have a great influence on the heat dissipation capacity. Compared with the initial liquid-cooled plate, although the flow resistance of the new liquid-cooled plate is greater resulting in more energy consumption, the temperature uniformity and heat dissipation capacity are improved, under different discharge rates and inlet flow rates. This study serves as a valuable reference for designing liquid-cooled plates.
