Design And Development Of Intelligent Mobile Phone Client Based On Android For Electric Vehicle Monitoring System

With the rapid development of China's electric vehicle industry,people's awareness of environmental protection continue to awaken,China's electric car users also increased.The traditional electric vehicle monitoring system has been gradually unable to meet the needs of users,users want to use more intelligent system to manage electric vehicles.Car network provides a "smart mobile device + vehicle terminal" of the electric vehicle monitoring mode as a smart management of the development direction of the car,which not only allows users to more easily access the internal parameters of electric vehicles,but also to ensure the safe driving of electric vehicles.This paper designs and develops the intelligent mobile phone client of electric vehicle monitoring system based on Android platform.The electric vehicle monitoring system needs to obtain the running data and some system parameters of each system inside the electric vehicle.Battery system is the power source of electric vehicles,real-time access to the internal parameters of the battery system is an important part of electric vehicle monitoring.Based on the Thevenin model,this paper deals with the battery data.The recursive least squares method is used to identify the parameters including open circuit voltage OCV,polarization internal resistance,ohmic internal resistance and time constant.Based on the Rint model to describe the characteristics of the battery,based on this model to identify the parameters of the negative capacity,negative initial SOC,negative termination SOC and internal resistance R.On this basis,finish the algorithm with java language on the Android platform.According to user needs analysis,this paper completed the client other related functions,including Wi-Fi-based data transmission function,the data received from the electric car data analysis,data processing,and data storage.At the same time,in order to facilitate the user control the vehicle,designed the remote control function module.With the Baidu SDK,finished the vehicle navigation,positioning,near the point of interest search and other functions.Finally,on the basis of various functional modules designed and finished,begin to joint debugging with the virtual machine and the real machine.Test results show that the system is stable,safe and reliable,simple and beautiful interface,the functional modules to achieve the desired results.