Design And Service Performance Analysis Of CFRP Battery Shell For Electric Vehicle

ince the twenty-first Century,with the rapid improvement of people's quality of life andthe rapid development of the automobile industry,the automobile has become an indispensable means of transportation for people's daily travel.The number of automobile has increased dramatically and the problem of exhaust emissions has become one of the important factors of environmental pollution.Therefore,the electric vehicle(EV)has been rapidly applied and developed by the government and automobile manufacturers.Battery shell,as the main load-bearing component of EV's battery pack,will directly affect the operation of battery pack.Limited by technology of the battery technology,the volume and quality of the battery shell are very large,which increases the quality of the vehicle and limits its application in small cars.The carbon fiber battery shell can not only improve the capability of the battery shell,but also greatly reduce the quality of the battery shell and improve the economy of the whole vehicle by choosing the appropriate layer angle and order.Therefore,the carbon fiber battery shell has important significance of development and extensive application space.So far the experimental and simulation research on the static and vibration of the traditional material battery shell has been extensively studied.However,there are still few studies on carbon fiber composite battery shell.Therefore,based on ABAQUS software,the Finite Element Analysis and research of the composite battery shell under different working conditions were carried out in this paper.Firstly,according to the design requirements of battery shell,the geometric model of battery shell was established and its reinforcement design was carried out.Considering the forming process,the cost and mass production of composite battery shell,the forming method of composite battery shell was provide.According to the design method of fiber ply,four different laying schemes were designed.Secondly,based on the Hashin failure criterion and the maximum stress criterion,the simulation analysis of the battery shell under the different working conditions and different layers was carried out on through the ABAQUS software.According to the static analysis and modal analysis results,four different lay-up schemes were compared,and two better laying schemes were selected for subsequent analysis.According to the mechanical impact analysis results,there was no failure of each fiber layer,and an ideal layer plan was obtained.The results of random vibration analysis showed that the carbon fiber battery shell has better anti-vibration effect and lower vibration sensitivity.According to the limit temperature analysis results,the natural frequency scarcely decreased and met the scope specified in the vibration test standard.The lateral bending stiffness and the load carrying capacity of the battery shell were obtained from the impact analysis.According to the analysis of the service performance of the battery shell,the carbon fiber laying method was more ideal for [0°,90°,45°,-45°].The battery shell had good mechanicalimpact resistance and high anti-vibration performance.The mass of the carbon fiber battery shell reached 44.2kg,and the weight reduction effect reached 50%.The load carrying capacity of the battery shell reached 33.73 KN.