Research on air‐cooled thermal management of energy storage lithium battery

Abstract

AbstractBattery energy storage system occupies most of the energy storage market due to its superior overall performance and engineering maturity, but its stability and efficiency are easily affected by heat generation problems, so it is important to design a suitable thermal management system. Due to the huge scale, complex composition, and high cost of stationary energy storage systems, it is difficult to optimize its parameters and structures by direct experimental research. In order to explore the cooling performance of air‐cooled thermal management of energy storage lithium batteries, a microscopic experimental bench was built based on the similarity criterion, and the charge and discharge experiments of single battery and battery pack were carried out under different current, and their temperature changes were analyzed. The numerical simulation study of the thermal management system of the battery pack is carried out by using ANSYS Fluent software, and the numerical simulation results are compared with the experimental results to verify its feasibility. And the influence of structural and parametric factors such as inlet and outlet position, battery spacing, and inlet air volume on the performance of the air‐cooled thermal management system is explored by means of numerical simulation. The results show that the heat generation of the battery in the discharge process is higher than that of the charging process, and the air from the top of the battery pack can achieve a better cooling effect, and there is an optimal battery spacing to achieve the best cooling effect, and the research conclusion provides some reference for the optimal design of the actual stationary energy storage system.