纯电动汽车电池箱体结构轻量化设计(含CAD零件装配图)(任务书,开题报告,文献摘要,论文说明书13000字,CAD图5张)
摘要
近年来，电动汽车发展迅速，已成为汽车未来发展的一个主要方向。在当前电池技术难以取得突破的前提下，当前电动车存在动力电池过重的问题，极大地影响了电动汽车的驾驶性能和续航里程。电池箱作为动力电池的载体，对动力电池的安全性、密封性具有十分重要的作用，针对目前电动汽车动力电池箱体存在型材结构复杂，重量过重等问题，本文基于吉利某款纯电动汽车的动力电池箱，通过运用有限元分析软件对电池箱体进行静力学分析和模态分析，根据分析结果对电池箱进行尺寸优化和材料更换，并对比了优化前后的性能的变化，提出一种确实可行的轻量化方案。优化后的电池箱总重386.4kg,减重29.7%，箱体由原来的199.3kg减为现在的36.4kg,减重达82%，轻量化效果十分明显。
关键词：电池箱；静动态特性；有限元仿真；轻量化
Abstract
In recent years, electric vehicles have developed rapidly and become a major direction of future development of automobiles. Under the precondition that the current battery technology is difficult to break through, the current electric vehicle has the problem of overweight power battery, which greatly affects the driving performance and endurance mileage of the electric vehicle. Battery box, as the carrier of power battery, plays an important role in the safety and sealing of power battery. Aiming at the problems of complex profile structure and heavy weight existing in power battery box of electric vehicle at present, based on the power battery box of a pure electric vehicle in Geely, this paper carries out static analysis and modal analysis of battery box by using finite element analysis software. According to the analysis results, the size optimization and material replacement of battery box are carried out, and the performance changes before and after optimization are compared, and a feasible lightweight scheme is proposed. After optimization, the total weight of the battery box is 386.4 kg, and the weight loss is 29.7%. The weight of the battery box is reduced from 199.3 kg to 36.4 kg, and the weight loss is 82%. The lightweight effect is very obvious.
Key words:battery box; static and dynamic characteristics; finite element simulation; lightweight
目录
第一章绪论 1
1.1选题研究背景 1
1.2研究意义 2
1.3国内外研究现状 2
1.3.1电动汽车发展现状概述 2
1.3.2电池箱轻量化设计研究现状 3
1.4本文主要研究内容 4
第二章电池箱的结构设计 5
2.1 引言 5
2.2电池箱的结构设计 5
2.2.1 电池箱的相关设计要求 5
2.2.2 电池箱的布置形式 5
2.2.3 电池箱的结构设计 6
2.3本章小结 7
第三章电池箱有限元模型的建立 8
3.1 引言 8
3.2 有限元方法的基本理论 8
3.3有限元应用软件介绍 9
3.4有限元模型的建立 9
3.4.1模型简化 9
3.4.2模型的几何清理 10
3.4.3网格划分和质量检查 10
3.4.4连接关系的模拟 11
3.4.5材料属性和厚度的赋予 11
3.5本章小结 12
第四章电池箱的静动态性能分析 13
4.1引言 13
4.2 电池箱的静态特性分析 13
4.2.1 电池箱的加载 13
4.2.2 静力分析结果 13
4.3 电池箱的模态分析 14
4.3 本章小结 15
第五章电池箱轻量化设计 16
5.1引言 16
5.2 轻量化设计优化 16
5.2.1 静力学分析 16
5.2.2 模态分析 17
5.2.3 轻量化优化评价 18
5.3 本章小结 18
第六章总结和展望 19
6.1全文总结 19
6.2展望 19
参考文献 20
致谢 21
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