Research On Lightweight Structure And Optimization Of Photovoltaic Power Generation Efficiency Of Self-developed Solar Test Vehicle

Due to depletion of resources and environmental pollution,it has become more and more important to find and develop new energy sources that used by vehicle.As a pollution-free,zero-emission and inexhaustible energy,solar energy has a huge advantage.Especially for vehicles which work in the field,their working environment is often a field work site with inconvenient transportation,lack of fuel supply,good lighting conditions and sufficient lighting time.Solar engineering vehicles can exert their advantages of energy saving,environmental protection and sustainability.This paper is also a research project of a solar welding engineering test vehicle independently researched by the research group,and analyzes and optimizes its key assemblies.The first part job in this paper is to analyze the body structure of solar car and to build the finite element model of the body frame in ANSYS Workbench.The overall stiffness characteristics and partial openings of the vehicle body under typical working conditions are analyzed,and the light weight potential is evaluated.Then the critical skeletal beam section parameters were selected as design variables by sensitivity analysis method,and a better body weight reduction scheme was calculated by using the response surface method(RSM).Finally,under the premise of satisfying the mechanical properties,the body frame weight loss was 8.01%,achieving the goal of light weight.This paper also studies the power generation efficiency of vehicle-mounted photovoltaic arrays.Through the analysis of the equivalent circuit model of the photovoltaic cell,the Simulink simulation model of the solar vehicle PV module was built in the MATLAB environment,And the effects of irradiance and temperature on output characteristics were analyzed.Furthermore,the local shadows common in vehicle operation lead to the mismatch of vehicle array power.The effects of different connections and different shadows on photovoltaic power generation efficiency are analyzed.The configuration optimization configuration scheme is proposed to improve the power generation efficiency.Finally,This article verify vehicle performance in ADVISOR.According to the lack of solar vehicle modules in mainstream vehicle simulation software,the secondary development of the solar vehicle module(EV_PV)is carried out on the basis of the pure electric vehicle(EV)module.The performance parameters such as cruising range was simulated to verify the positive effect of the optimized design on the performance of the vehicle.