本文選題：均衡　切入點：Simulink仿真　出處：《武漢紡織大學(xué)》2017年碩士論文

【摘要】：能源危機與環(huán)境惡化是中國新能源汽車發(fā)展的必然選擇,已成為國家重點發(fā)展的新型戰(zhàn)略產(chǎn)業(yè)。電池技術(shù)、電機控制、電池管理系統(tǒng)是新能源汽車的三大關(guān)鍵,電池技術(shù)是基礎(chǔ)。電池管理系統(tǒng)對電池組的安全性能起制約要素,成為該領(lǐng)域的關(guān)鍵技術(shù)問題,研究意義重大。源于鋰離子動力電池材料本身的特性、生產(chǎn)工藝導(dǎo)致的動力電池不一致性以及實際運行工況的復(fù)雜性,精確估算電池荷電狀態(tài),并實時動態(tài)對電池或電池組間能量進行無損調(diào)度,是解決新能源汽車動力電池安全問題最重要的途徑,因此電池荷電狀態(tài)估算和均衡技術(shù)成為電池管理系統(tǒng)的兩大核心技術(shù)。針對特定應(yīng)用開發(fā)高性能和高性價比的均衡電路以及優(yōu)化均衡策略是鋰離子電池均衡技術(shù)的重要研究問題。在研究過程中,結(jié)合項目組的需要和安排,開展了以下四個工作:(1)電池材料的制備和半電池的研制檢測,以及動力電池性能充放電性能檢測。開展了鋰離子電池正極三元材料制備、安裝和充放電性能檢測,掌握了鋰離子電池制備工藝;同時運用大電流充放電柜,對不同規(guī)格動力電池,如磷酸鐵鋰、錳酸鋰、三元等電池進行充放電性能檢測,并進行電池荷電狀態(tài)估算;(2)開展了均衡電路仿真與均衡策略研究。針對新能源汽車面臨的電池管理技術(shù)難題,通過查閱大量國內(nèi)外文獻資料和著作,在分析總結(jié)相關(guān)均衡技術(shù)的基礎(chǔ)上,結(jié)合廣泛使用的開關(guān)電源技術(shù),對buck-boost變換器和雙向反激式DC-DC結(jié)構(gòu)的均衡電路進行了細致的仿真研究。研究表明基于buck-boost結(jié)構(gòu)的均衡電路具有易模塊化、可并行處理、可實現(xiàn)動態(tài)均衡等優(yōu)勢。同時,利用基于LTC3300芯片架構(gòu)的均衡控制方案,用LTspice仿真軟件對該芯片進行仿真研究,獲取均衡參數(shù);(3)研究設(shè)計了一種基于繼電器網(wǎng)絡(luò)控制的均衡電路。為實現(xiàn)有效的均衡,研究設(shè)計了一種基于繼電器網(wǎng)絡(luò)控制的均衡電路,該電路可以通過MCU實時控制和實現(xiàn)各種均衡,并具備高效、安全等特點;(4)研究設(shè)計了適用于均衡控制電路的中的充電模塊。基于LT3741芯片,開發(fā)了恒壓恒流電源輸出,從而實現(xiàn)對電池和電池組的充電均衡。由于電池管理系統(tǒng)屬于復(fù)合交叉,并且整個系統(tǒng)過于龐大,均衡控制電路和均衡充電模塊,仍需要更多的軟件層面的策略研發(fā)和實驗驗證。通過參加電池管理系統(tǒng)研發(fā)項目,參與了涵蓋電池技術(shù)和電池管理系統(tǒng)開發(fā)的全過程,并在均衡技術(shù)方面開展了大量工作,相關(guān)更深層次的技術(shù)問題和基礎(chǔ)問題,仍有待通過今后工作實踐加深認識并解決。
[Abstract]:Energy crisis and environmental deterioration are the inevitable choice for the development of new energy vehicles in China, and have become a new type of strategic industry of national key development. Battery technology, motor control and battery management system are the three key points of new energy vehicles. Battery technology is the foundation. Battery management system has become the key technical problem in this field, which is the key technical problem of battery pack safety performance, which is derived from the characteristics of Li-ion power battery materials. Because of the inconsistency of power cell caused by production process and the complexity of actual operating conditions, the charged state of the cell is estimated accurately, and the energy between the cells or the battery pack is dynamically and dynamically adjusted in real time. Is the most important way to solve the problem of power battery safety in new energy vehicles. Therefore, battery charge state estimation and equalization technology are the two core technologies of battery management system. To develop high performance and high performance price ratio equalization circuit for specific applications and optimize equalization strategy is lithium ion battery equalization technology. In the course of research, In accordance with the needs and arrangements of the project team, the following four tasks were carried out: preparation of battery materials, development and testing of semi-batteries, performance tests of power batteries, and preparation of cathode ternary materials for lithium-ion batteries. Installation and charge-discharge performance test, master the preparation process of lithium ion battery, and use high current charging and discharging cabinet to test the charge-discharge performance of power battery of different specifications, such as lithium ferric phosphate, lithium manganese oxide, ternary battery, etc. The equalization circuit simulation and equalization strategy research are carried out. In view of the technical problems of battery management faced by new energy vehicles, a large number of domestic and foreign literature and works are consulted. On the basis of analyzing and summarizing the relevant equalization technology, combined with the widely used switching power supply technology, The detailed simulation of buck-boost converter and bi-directional flyback DC-DC equalization circuit is carried out. The results show that the equalization circuit based on buck-boost structure is easy to modularize, can be processed in parallel, and can realize dynamic equalization. Using the equalization control scheme based on the LTC3300 chip architecture, the simulation research on the chip is carried out by using the LTspice simulation software, and the equalization parameters are obtained. A kind of equalization circuit based on relay network control is designed. A kind of equalization circuit based on relay network control is studied and designed. The circuit can control and realize all kinds of equalization in real time through MCU, and has high efficiency. Based on LT3741 chip, the output of constant voltage and constant current power supply is developed. Because the battery management system belongs to the compound cross, and the whole system is too large, the equalization control circuit and the equalization charging module are realized. More software level strategy development and experimental verification are still needed. By participating in the battery management system research and development project, we are involved in the whole process of battery technology and battery management system development, and have done a lot of work in balancing technology. Related deeper technical problems and basic problems still need to be further understood and solved through future work practice.
【學(xué)位授予單位】：武漢紡織大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM912

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