Experimental Research On Road Reliability Enhancement Of Electric Vehicle

With productions and sales of the blade electric vehicle(BEV)increased year by year,the quality of BEV gradually attracts the attentions of automobile manufacturers and consumers,and the reliability which is the important indicator of the products quality,has been highly valued by the enterprise.The proving ground enhancement test has been an important way used by domestic and foreign automobile manufacturers to improve the reliability of automobile products,and to accelerate product development speed.At present,"reliability test specification" used by China’s automotive industry,is mainly programmed for the traditional fuel vehicles,but not applicable for the BEV.Therefore,in the BEV reliability verification area,a new system needs to be formulated.This thesis can provide a BEV reliability verification method for the enterprise to solve the above problems.This study which is based on the BEV production EV,,chooses one year driving distance of randomly selected 200 cars from the Beijing area private users as the research sample.The result of this study can provide the basis for electric vehicle road reliability test.First,this thesis explains the purpose and significance,introduces the history and present reliability research situation of domestic and foreign automobile industry,analyzes the automobile reliability test method,concludes problems of automotive reliability enhancement test;Secondly,the fatigue damage theory is studied for the whole vehicle damage,including the cyclic load theory,fatigue performance curve,cycle counting method and Miner linear damage theory;Third,based on the data from electric vehicle management information center,this thesis carries out the BEV road driving conditions data collection of Beijing area,and analysis patterns and characteristics of the user travel;Fourth,the load spectrum of the user typical road and the Ministry of communications test road is collected by using related test equipment.Fifth,by using nCode software to edit collected load spectrum data,this thesis concludes vehicle fatigue cumulative damage equivalent ratio of users 200 km road and test field enhancement roads10,000.Thus this thesis arrived at the strengthen road mileage equal to 160,000 kilometers of user road,and the result is verified in the actual process.