Simulation Analysis And Optimization Dsesign Of Air-cooled Thermal Managemen System For Lithium-ion Battery Energy Storage Container

In the current era of global advocacy of strengthening environmental protection and sustainable use of resources,the application demand for energy storage systems is gradually increasing.Lithium-ion batteries are widely used in energy storage systems due to their environmental friendliness,high specific energy,and good cycle performance.in.The use performance and safety performance of the energy storage system are affected by the temperature of the lithium-ion battery and the uniformity of the system’s heat distribution.Therefore,it is very important to design a lithium-ion battery thermal management system with excellent cooling performance.The forced air cooling and heat management system is favored in the practical engineering application of energy storage system due to its advantages of low cost,easy realization and easy maintenance.However,the structure of the energy storage system is complex and bulky,and it is difficult to directly optimize the design of its structure through experiments.Therefore,it is of great significance to conduct thermal simulation research on the lithium-ion battery energy storage system by establishing a high-precision thermal simulation model.The traditional finite element simulation method has a huge amount of calculation and time-consuming,so a fast numerical solution method is needed to solve this problem.In this paper,a highprecision electrochemical-thermal coupling simulation model is established to simulate and analyze the lithium-ion battery energy storage container,and the structure is optimized,and the temperature field is reduced based on the principle of intrinsic orthogonal decomposition to realize the energy storage container Fast numerical calculation of the temperature field of the thermal management system.Firstly,study the electrochemical model and thermal characteristics of lithium-ion batteries,identify related parameters,establish an electrochemical-thermal coupling simulation model,and use ANSYS Fluent simulation software to simulate single cells and Z-slot battery packs based on the thermal simulation model Research;At the same time,an experimental platform is built to obtain the surface temperature data of lithium-ion battery cells,and the results are compared with the simulation results to verify the feasibility and accuracy of the established thermal simulation model and the simulation method.Secondly,carry out modeling and simulation analysis on the energy storage container unit-energy storage lithium-ion battery pack to obtain its temperature field distribution and flow field distribution,by changing the shape and position of the baffle,the number and layout of vents,and the position of the fan.In this way,the structure optimization design of the energy storage lithium ion battery pack is carried out to obtain the energy storage lithium ion battery pack structure with the best cooling effect.And use the principle of intrinsic orthogonal decomposition to reduce the dimensionality of the temperature field of the energy storage lithium-ion battery pack,and realize the rapid numerical calculation of the temperature field.Finally,based on the structure of the energy storage lithium-ion battery pack with the best cooling effect,the energy storage container is modeled and simulated,and the structural parameters of the energy storage container thermal management system are discussed in terms of the length of the air inlet,the distance between the battery packs,and the angle of the deflector.The cooling effect is affected by the structural optimization design of the structure,and the cooling performance of the thermal management system is improved;and the temperature field of the energy storage container is reduced by using the principle of intrinsic orthogonal decomposition to realize the rapid numerical calculation of the temperature field.On this basis,the structure of the lithium-ion battery energy storage container is further optimized.