面向小容量電池組的電池管理系統(tǒng)的研究與設(shè)計
[Abstract]:As a kind of clean energy, electric energy can be obtained by conversion of water energy and solar energy to reduce environmental pollution and avoid the energy crisis caused by the shortage of traditional fossil energy. As an independent energy storage system, battery is playing an increasingly important role. In many fields, such as electric vehicles, unmanned aerial vehicles and motion robots, the power lithium battery pack is often used as the energy supply device, in order to improve the efficiency and safety of the battery pack, In order to ensure the normal operation of the battery pack, it is necessary to complete and perfect the reasonable cell management system (BMS) for the relevant management and control of the battery pack. Due to the rapid development of the electric vehicle industry, the current research focus on battery management system is usually focused on the research of the direction of large capacity battery pack, but it is not suitable for low-speed electric vehicles, rickshaws and robots. Based on the ternary power lithium battery, a battery management system (BMS).) for small capacity battery pack is designed in this paper. Based on the study of the characteristics of ternary lithium batteries, a battery model for compensating hysteresis voltage and springback characteristics is established. On the basis of the model, the unscented Kalman filter algorithm is used to estimate the battery residual quantity. The battery management system designed in this paper mainly includes the functions of residual power estimation, balance management, voltage and current detection, data communication, thermal management, security protection and information display. A distributed architecture based on chrysanthemum chain is adopted in this paper, and the whole function is distributed to two parts: the main control unit and the detection unit. In the process of software development, the embedded operating system FreeRTOS, is added to improve the utilization rate of system resources and enhance the real-time performance of the system. The upper computer interface designed based on MFC can display the basic parameters of the system and complete the function of man-machine interaction. Finally, the battery management system for small capacity ternary power lithium-ion battery pack is tested in laboratory environment. By connecting the test battery pack into the battery management system and collecting and comparing the important parameters such as voltage, current and temperature, the sampling accuracy of the system is verified. At the same time, the equilibrium management function and the thermal management function are preliminarily verified. Finally, the main function of the battery management system is realized, and the design requirements and purposes are achieved.
【學(xué)位授予單位】:長安大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM912;TP311.52
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