Application Analysis of Pultrusion Composite Material in Battery Pack Expansion Beam
Pultrusion composite material is a material made through the pultrusion process,which is a continuous manufacturing process with high specific strength and stiffness,a weight reduction of(25~30)%compared to conventional metal structures,and can significantly improve vehicle performance.This article compares the performance of polyurethane resin+60%glass fiber through pultrusion process and aluminum alloy material.Taking the expansion beam inside the battery pack as an example,under the same load,the maximum stress of the metal joint is 130 MPa.Calculated based on the tensile strength of cast aluminum material of 330 MPa,the safety factor of the metal joint is 2.54,and its maximum bearing capacity is about 9 144 N;The maximum stress of the composite joint foam is 0.1 MPa,and the maximum failure factor of the laminated plate skin is only 0.011.Therefore,when subjected to tensile and compressive loads,composite joints have higher strength,providing technical reference for the subsequent research and application of pultruded composite materials.