摘要地球上石油资源趋于枯竭状态，环境问题在一天天恶化，从而迫切需要一种新能源技术的创新与发展来改变现状。近几年来，电动汽车技术的不断创新与发展让人们看到了问题解决的希望。与传统燃油汽车相比，电动汽车在环保、节能上面占了很大的优势，因此越来越受到人们的欢迎与关注。电动汽车的核心技术在于其能源装置，即动力电池。作为动力电池的材料有很多，目前市场上应用比较广泛的是锂离子电池。动力电池性能的好坏直接影响电动汽车的整体性能，因此使电池能够长时间稳定工作成为目前国内外研究的重点。86280

锂离子动力电池受温度的影响比较大，温度过高会严重影响电池的工作性能及使用寿命。本文通过对锂离子动力电池进行发热仿真模拟分析，得到其发热特点及其温度分布，通过详细的讨论对电池箱的功能进行定位；根据这些特性设计一种针对锂离子电池散热冷却的电池箱散热系统，使用Solidworks软件进行三维建模设计出一种散热性能较佳的风冷散热系统，并对整个散热系统做仿真流体分析，针对分析的结果进行优化改进结构使电池箱的风冷系统能够更好地满足要求。意在对锂离子动力电池的散热结构研究做出一点贡献，为电动汽车技术的发展做出自己的一份努力。

毕业论文关键词：电动汽车；电池箱体；散热结构设计；仿真分析

Abstract Oil resources has dried up on the earth, environmental problem is deteriorating,it urgently need a kind of new energy technology innovation and development to change the status。 In recent years,the constant innovation and development of the electric vehicle technology let people see the hope of problem solving。Compared with traditional fuel cars, electric cars have a great advantage on environmental protection and energy saving,so more and more people pay attention to it。The core of the electric car technology lies in its energy device, namely, power battery。There are a lot of materials s the material of power battery ,it is widely used on the market at present is lithium ion battery。The stand or fall of power battery performance directly affects the performance of electric vehicles ,so that the battery can work stably for a long time to become the focus of the research at home and abroad。

 Lithium ion power battery is affected by temperature is large, high temperature will seriously affect the working performanc。Based on lithium ion power battery heat simulation analysis, we can get the fever characteristics and the temperature distribution, through detailed discussion on the function of the battery box to locate;According to these characteristics to design a battery box of lithium ion battery cooling cooling heat dissipation system, using Solidworks software for 3 d modeling design a better heat dissipation performance of cooling system, and analysis on the cooling system for the simulation of fluid on the results of the analysis by improving structure of battery box air-cooled system can better meet the requirements。 To make a little contribution on research on lithium ion power battery cooling structure ,for the development of electric vehicle technology to make my efforts。

Keywords: The electric car ; Battery box ; Cooling structure design ;Simulation analysis

目录

第一章   绪论 1

1。1  研究背景 1

1。2 纯电动汽车及锂电的发展 2

1。2。1  纯电动汽车国内外发展现状 2

1。2。2  纯电动汽车对动力电池的技术要求 3

1。3  车用锂电池及电池组散热的研究现状