Development Of Main Dimension Strategy For Pure Electric Vehicle Architecture

With the implementation of national policies and the development of ’ motorbattery-control’ technology,the new energy vehicle market has entered a new stage.Pure electric vehicle architecture has the advantages of larger space,longer endurance and better experience than the previous oil-to-electricity architecture or the vehicle architecture compatible with various types of power.Therefore,various automobile manufacturers have begun to develop pure electric vehicle architecture.During the process of architecture development,the main dimension strategy is an important method to realize the generalization of architecture.Through the main dimension strategy,the architecture can be compatible with different types of models,different levels of models and different product configurations.Based on the experience of the main dimension strategy development from OEM L,and the study of the relationship between vehicle structure and performance,a main dimension strategy development method based on steering trapezoid mechanism and power battery,is proposed.This research is in accordance with the forward development methodology.On the one hand,it can maximize the advantages of pure electric vehicle,and greatly enhance the development efficiency.On the other hand,it is helpful for enterprises to establish the technical ability of the forward integration of the main dimension strategy of the pure electric architecture,and provides guarantee for the subsequent architecture upgrade iterations.The main dimension strategy method discussed in this research is as follows.(1)Firstly,the inputs of architecture development are obtained from product definition,and the development targets of main dimension bandwidth of architecture are extracted,as well as the goal of architecture performance and function realization.Thus,the steering trapezoid and power battery boundary are preliminarily defined.(2)Then,through the layout topology of the key components of the vehicle,the dimensional chain correlation of the key components of the vehicle with the steering trapezoidal mechanism and the power battery in each dimension direction of the vehicle is constructed.The dimensional bandwidth boundary values of each dimension direction of the architecture are derived with the help of the dimensional chain.The performances and function objectives of the components involved in each dimension are verified in the derivation process.(3)The derived architecture size bandwidth results are matched with the above decomposed architecture size bandwidth targets.If it cannot match,the boundary of parts in the corresponding size direction or the selection of parts will be adjusted,the dimensional chain in each direction will be recalculated until the targets are achieved.According to the main size expansion strategy,the size of each vehicle covered by the distribution architecture can be allocated.(4)Finally,through a series of simulation experiments and real vehicle experiments,the design results are validated,and the main size strategy of the architecture is obtained.The main-dimension-strategy development method of pure electric architecture proposed in this paper has been successfully applied in pure electric S architecture development of OEM L.With the expected results achieved,it may have a wide application prospect.