【正文】 系 別 電氣工程與自動化 專 業(yè) 電氣工程與自動化 年 級 2021級電氣一班 學 號 20210801012 姓 名 指導老師 武漢大學珞珈學院 2021 年 5 月 16 日 I 摘 要 隨著全世界汽車數(shù)量的增加 ,人類對能源的需求越來越大。電動汽車作為未來汽車的發(fā)展方向 ,越來越受到人們的重視。就目前使用的動力電池來說 ,怎樣建立對電池有利的充放電控制模型、實時監(jiān)控電池荷電狀態(tài)、防止電池過充與過放來延長電池的使用壽命 ,怎樣對電池進行實時或定 期的自動故障診斷和維護 ,最大層度地保證電池的可靠運行 ,這些問題都需要通過開發(fā)有效合理的基于實時總線的電池管理系統(tǒng)來加以解決。提高管理系統(tǒng)通信可靠性的技術可分為硬件和軟件兩個方面 ,僅采用硬件技術 ,如電磁隔離、去禍濾波、噪聲補償?shù)?,仍有一些頻段的干擾侵入系統(tǒng) ,不能完全滿足應用系統(tǒng)的要求。硬件技術和軟件技術的巧妙結(jié)合 ,是提高系統(tǒng)可靠性的有力手段 。采用了優(yōu)先級提升算法對系統(tǒng)進行了改進設計 ,該算法不但可以提高系統(tǒng)實時通信的性能和帶寬利用率 ,還在一定程度上避免了消息死鎖的出現(xiàn)。經(jīng)過試驗驗證 ,改進后的通信系統(tǒng)可以安全可靠的運行 ,從而保證電池管理系統(tǒng)可靠運行完成預定功能。s demands for energy is growing. Electric cars are the future direction of vehicles. More and more attention has been paid. In order to let a variety of electric vehicles pete with conventional internal bustion engine cars , the performance of power battery must be improve. Recently, the problem of power battery is, how to establish an suitable battery charge and discharge model, realtime monitoring of battery state of charge to prevent overcharge and overdischarge of the battery to extend battery life , and how to carry out realtime or regular battery automatic fault diagnostics and maintenance , the greatest degree of assurance that the battery level reliability. All these problems can be resolved through the development of effective and reasonable battery management system (BMS). Battery management system due to the unusual circumstances surrounding the poor work place in strong external power noise and other interference improvement in reliability of munication system has bee the key to success of battery management system. The improvement in the reliability of munications systems can be divided into aspects. It includes hardware and software technology. Just using the hardware technologies such as magic separation coupling filtering noise pensation there are still some band interference invading systems and can not fully meet the III application system requirements. Software anti jamming technology is also needed. Hardware and software ingenious bination is the way to improve the reliability of embedded systems. This paper provides CAN bus munication reliability analysis and battery management system design based on hybrid power driving Bus EQ6110 test platform and CAN bus design for the BMS. Author also studies of various factors which impact system reliability. A CAN bus information scheduling model and Synchronous and asynchronous conception has been presented in the text. Different types of messages can be transmitted separately. Finally author presents the priority promoting scheduling algorithm. Living test confirm that the improved battery management system can be safely and reliably operated as we intended. The algorithm not only can improve the system performance of realtime munication and bandwidth utilization, also to a certain extent to avoid the appearance of the message deadlock. Finally, the author of this topic summarized the research work in the project and pointed out that further research on the subject of the future direction. Keywords: battery management system CAN bus information model scheduling algorithm 目 錄 第 1 章 緒論 ............................................................1 課題研究的背景 .....................................................1 電池管理系統(tǒng)及其通信網(wǎng)絡技術發(fā)展現(xiàn)狀 ...............................2 國外的發(fā)展狀況 .................................................2 國內(nèi)的發(fā)展狀況 .................................................3 CAN 總線在電池管理系統(tǒng)應用中的優(yōu)勢與存在的問題 .....................4 汽車網(wǎng)絡環(huán)境采用 CAN 總線通信的優(yōu)勢 .............................4 CAN 總線運用在電池管理系統(tǒng)通信節(jié)點上中存在的問題 ................5 第 2章 電池管理系統(tǒng)設計方案 ..........................................6 電池管理器工作原理 .................................................6 智能管理模塊設計思路 ...............................................8 CAN 總線通信模塊 ...............................................8 充放電保護模塊 .................................................9 電池管理系統(tǒng)的通信節(jié)點網(wǎng)絡模型 .....................................9 電池管理系統(tǒng)的拓撲結(jié)構 .........................................9 電池控制模塊中的消息系統(tǒng) ......................................10 本章小結(jié) ..........................................................11 第 3 章 CAN總線技術分析 ..............................................12 CAN 總線網(wǎng)絡協(xié)議分析 ...............................................12 CAN 總線的特點 .................................................12 CAN 總線的分層結(jié)構 ............................................12 CAN 總線多址接入 /沖突避免 (CSMA/CA)機制 .........................13 CAN 總線的報文傳輸 .............................................14 CAN 總線調(diào)度算法研究 ...............................................19 固定優(yōu)先級調(diào)度算法 ............................................19 固定優(yōu)先級調(diào)度算法中的消息分類 ................................20 固定優(yōu)先級調(diào)度算法的優(yōu)先級分配 ................................21 CAN 總線的錯誤檢測與處理機制 ......................................21 總線中的錯誤類型 ..............................................21 故障界定 ......................................................22 本章小節(jié) ..........................................................23 第 4章 系統(tǒng)硬件設計 .................................................. 24 數(shù)字信號處理器的選擇 .............................................. 24 DSP 外圍電路的設計 ................................................ 25 DSP 電源及復位電路設計 ........................................ 25 DSP 仿真器及 JTAG 接口 ........................................ 26 采 集 電 路 .....................................................26 電 壓 采 集 ...................................................26 電流采集 ......................................................27