Design And Implementation Of Battery Management System Based On Online Battery Status Detection And Feedback

With the development of science and technology,the problem of environmental pollution and energy shortage has become more and more serious.In order to deal with these problems,people focus on the study of various new energy vehicles.Among them,as the key study object,electric vehicles have received widespread attention.The study of the power battery and battery management system(BMS)plays a key role in the development of the electric vehicles.The dissertation mainly completes the design and implementation of battery management system based on online battery status detection and feedback.Considering the problem that the traditional battery management system is closed,a more open system is proposed.The work of the whole process from battery making,hardware management,software management to visual display is completed.First of all,the new graphene battery has been prepared,and then tested and compared with the traditional battery,which has a certain significance for the development of the power battery.The performance of various kinds of lithium batteries in various temperature states was investigated by charging and discharging experiments,which provides data basis for the design of BMS.Then,the management system is designed and the overall framework of the system is built according to the battery characteristics.Various research work of the basic hardware platform of BMS is basically realized: The collection circuit of various parameters of the battery is designed and completed,the suitable heat dissipation device is selected for the heat management module through experimental comparison,and the balance circuit between the single cell is also completed.Finally,BMS visualization platform is constructed and the visual effect of each BMS modules is designed by using WPF.In combination with the use of real-time data platform,the system is realized online.On the basis of the real time data,an optimization scheme of state of charge(SOC)estimation based on error feedback is proposed,the user-controllable thermal management system with temperature prediction based on the monitoring of the environment and the temperature of the battery is realized,the error detection system with noise filtering is proposed,the method of battery life prediction based on data support is proposed,and the balanced management scheme based on SOC estimation is proposed.All these designs have some complementary significance to the traditional BMS,which will provide a more optimized development idea for the future development of BMS.