Design Of BMS Host Computer System Based On LabVIEW

With the aggravation of environmental pollution and energy exhaustion,the development of electric vehicles has gradually become the focus of social attention.In order to monitor and manage the battery packs of electric vehicles and enhance the operator's understanding and control of the battery management system(BMS),with LabVIEW as a tool,this paper designs a BMS upper computer system for master-slave battery management system.The specific work is as follows:Firstly,the communication module is designed.Different communication schemes are compared.and the following communication module design schemes are proposed with combining the structure of BMS and the functions of the upper computer.In order to realize the communication between upper computer and BMS master control module,RS-485 serial interface communication module is selected and designed.In order to debug BMS slave control module directly by upper computer,CAN bus communication module is selected and designed.After confirming the design scheme,by choosing the controller,transceiver and converter chip,the hardware circuit is built,and communication protocols are specified and the communication program is designed.Finally,the design of communication module is completed.Secondly,the upper computer software is designed.According to the functional requirements and design principles of upper computer,the upper computer system is designed separately from master control module and slave control module by using modular design idea,virtual instrument technology and LabVIEW and is divided into four functional modules: instruction sending,data receiving,data checking and data storage,which can control the master-slave control module of BMS,receive and display battery pack information,alarm for abnormal battery parameters,store battery pack history information and so on.After the successful debugging of the program,the human-computer interaction interface is optimized,and the application program and installation program are generated,which is easy to transplant software between different devices.Finally,the upper computer system is tested.The laboratory equipment and the corresponding hardware system of the lower computer are used to build the experimental platform,and the communication module and the upper computer system is tested.The test results show that the communication module can realize the communication between the upper computer and the main control module and the slave control module,and the software of the upper computer can run steadily,the information of the battery pack is displayed normally,and the functions of setting and inquiring the alarm threshold,alarming the abnormal parameters and storing the important parameters can be realized,which meets the design requirements.