摘要
Abstract
The quality of new energy vehicle battery boxes is closely related to their range.In order to achieve lightweight of new energy vehicle battery boxes while maintaining the safety performance of the original battery box,and further increase the range of pure electric vehicles,the battery box is modeled in Solidworks and imported into Hypermesh and Abaqus to establish a finite element simulation model.Static strength analysis and modal analysis are carried out on the battery box.According to the simulation results,carbon fiber composite material T300/5222 with lower density,higher specific strength and stiffness is used to replace the original metal material and design bottom support brackets for the battery box.Complex working conditions and extrusion simulation analysis are conducted on the new material battery box.The simulation results show that the static strength of the battery box has been improved,with the first order modal frequency increased to 31.79 Hz,which is higher than the external excitation frequency of 27.78 Hz.This solves the resonance problem caused by the low first order modal prequency of the original battery box,reducing the overall weight of the battery box by 29.1 kg and 52.8%.On the basis of enhancing the strength,stiffness,and safety performance of the battery box,the weight of the battery box has been reduced,achieving the goal of lightweight.The improvement of battery box structure and lightweight research have reference significance.关键词
电池箱/碳纤维复合材料/有限元分析/轻量化设计/结构安全性Key words
battery box/carbon fiber composite materials/finite element analysis/lightweight design/structural safety分类
机械制造
