Research On Software Development And Simulation Test Platform Of Charging Pile Based On Component Technology

The energy crisis and environmental pollution caused by the rapid development of the traditional automobile industry have become a huge pressure restricting China's economic development.For this reason,the Chinese government and major automobile manufacturers have begun to promote new energy vehicles based on electric vehicles.A fully functional,safe and stable electric vehicle charging pile is a necessary condition to ensure the widespread promotion of electric vehicles.With the continuous increase and change of functional requirements,the charging pile control software has become complicated,unstable and difficult to maintain;At the same time,due to the lack of testing methods,a large number of charging pile manufacturers have not performed a systematic test on their charging piles before leaving the factory.These defects make the real availability of charging piles put into operation in the market very low,it is difficult to meet the charging needs of a large number of charged cars,and severely hindered the industrialization of electric cars and charging piles.In order to improve this situation,this study has sought to solve the problem from the perspective of charging pile development and testing.First,from the perspective of charging pile development,this research chooses to develop a set of charging pile control software based on component technology.The main work done is to establish the charging pile software architecture based on the MVC layered structure,and then analyze the functional requirements of the charging pile according to the domain engineering and divide the functional modules according to the analysis results.After that,a set of component models applicable to the field of charging piles was designed and developed based on this.Finally,in order to evaluate the software module code quality,a component evaluation model is proposed based on cohesion and coupling and further optimized by using fuzzy theory.From the perspective of charging pile test,this research chooses to develop a charging pile control system simulation test platform based on semi-physical simulation technology.The main work done is: Analyze the working principle of different types of charging piles and the composition of hardware peripherals,and formulate an overall design scheme combining the upper and lower computers.Later,in order to realize the flexibility of test configuration,the micro-kernel architecture was used as the overall structure of the upper computer,and the core system and plug-in module design were completed on this basis.Finally,the software and hardware design of the lower computer(that is,the data acquisition board)is completed.The hardware design mainly includes simulation of the control guide circuit,contactor and communication interface of the actual AC and DC piles;The software design uses a double buffer queue and ISR(interrupt service routine)communication structure.This project originated from a development project in cooperation with enterprises.Two sets of charging pile software based on component technology were quickly put into practical use.Finally,taking Henan Jiyuan Charging Station as an example,the simulation test platform was used to perform unit testing and integration test experiments on the charging pile software in turn.The experiments show that the testing platform can efficiently and quickly test the charging pile software.Then,the component evaluation model was used to compare the old and new charging pile software.The test and evaluation results showed that the maintainability and reusability of the charging pile software developed based on component technology were significantly improved.In summary,it is of great significance to develop a set of low-coupling,high-cohesion,and easy-to-function extension charging pile control software and a high-efficiency and lowcost charging pile control software test system.