锂离子电池冷板仿生散热结构拓扑优化研究  

Research on optimization of lithium-ion battery bionic heat dissipation structure topology

作　　者：张琳[1] 程晓军 ZHANG Lin;CHENG Xiaojun(Mechanical and Electrical Engineering College,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学机电工程学院,哈尔滨150040

出　　处：《重庆理工大学学报(自然科学)》2025年第1期132-139,共8页Journal of Chongqing University of Technology:Natural Science

基　　金：国家自然科学基金项目(51306030)。

摘　　要：采用拓扑优化方法设计了一种仿肺状结构的新型冷板结构,利用双目标优化函数得到了拓扑优化后的模型,分析了不同体积分数和加权系数对其散热性能的影响。结果表明:在流体体积分数为0.6时,冷板结构的散热效果最好;当热目标占主导时(a∶b=0.9∶0.1),流道分支较多,散热效果较好。通过与传统七通道直流冷板的对比实验发现,基于拓扑优化的仿肺状结构冷板具有更好的散热效果和较低的压降。With the implementation of“carbon neutrality”strategy,new energy vehicles have been maintaining a fast growing momentum.Lithium-ion batteries,as the heart of new energy vehicles,hold the key to their power capabilities,service longevity,and operational stability.When working,lithium-ion batteries produce a substantial amount of heat,which exerts a detrimental impact on the electric vehicles’(EVs’)overall performance.The accumulation of heat on EVs may cause hazards such as fire or explosions.Therefore,battery thermal management has garnered keen academic interest.Condenser plates represent one of the most efficient cooling methods.By leveraging the variable density method and the principles of bionics,we design a cold plate model.Proper design variables are selected and corresponding constraint conditions are established.The RAMP interpolation model is employed to conduct inverse permeability interpolation and convex function interpolation,thereby accurately interpolating the physical attributes of the materials within the cold plate model.The SNOPT optimization algorithm is adopted as the optimization approach,with the minimization of the average temperature and the flow dissipation serving as the multi-objective optimization functions to execute topological optimization on the cold plate design area.Meanwhile,an investigation is made to analyze the impacts of diverse fluid volume fractions and weighting coefficients on the heat dissipation of the topologically optimized model.Our findings demonstrate under identical conditions,a fluid volume fraction of 0.6 aligns more closely with the practical design prerequisites,and when the weighting coefficient ratio stands at 0.9∶0.1,the heat dissipation efficacy reaches its peak.To thoroughly assess the heat dissipation of the lung-like cold plate,a three-dimensional cold plate model is built and a conventional direct current channel model with identical conditions is developed.To enhance the precision of computational results,a structured grid is utilized to

关 键 词：锂离子电池热管理系统 冷板 拓扑优化 压降 

分 类 号：TM912[电气工程—电力电子与电力传动]