本文選題：電動汽車 + 不一致性��； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：電動汽車在節(jié)約能源和改善環(huán)境方面已受到大眾充分的認(rèn)可。電動汽車的動力源即動力電池組,是決定電動汽車性能的關(guān)鍵要素。電池組由多節(jié)電力電池串聯(lián)而成,為電動汽車提供能量。由于制造和工藝的缺陷,即使同一類型的電池也會存在差異性。此外,在行駛過程中,動力電池會進(jìn)行多次循環(huán)充放電,此過程會導(dǎo)致電池組不一致性的擴大,從而造成個別電池的過充放電。這不僅降低了電池組的壽命,還可能引起安全事故。所以,保證電動汽車電池組的一致性成為了當(dāng)前電池管理的重中之重。本論文對上述現(xiàn)象展開了一系列的研究和分析。1、從國內(nèi)外熱點、市場導(dǎo)向等方向闡述了新能源電動汽車在環(huán)保和能源方面對汽車產(chǎn)業(yè)的變革做出的貢獻(xiàn)以及未來發(fā)展的趨勢,分析了動力電池組均衡技術(shù)研究的目的和意義。通過比較各種車用電池的優(yōu)缺點分析了鋰動力電池在電動汽車的優(yōu)越性。通過比較分析國內(nèi)外均衡拓?fù)浣Y(jié)構(gòu)和均衡策略的優(yōu)缺點,重點介紹了非能量耗散型均衡技術(shù)的重要性和發(fā)展,它不僅提高了電池組的壽命和工作效率,而且在節(jié)約能源方面有很大優(yōu)勢。2、通過研究電池的不一致性,分析了鋰電池的工作機理和鋰電池的重要指標(biāo)參數(shù),以及這些參數(shù)在動力電池外特性上的表現(xiàn)。研究分析了鋰動力電池的充放電特性,并根據(jù)PNGV電池模型進(jìn)行了HPPC以及標(biāo)準(zhǔn)充放電實驗,通過實驗和數(shù)據(jù)來分析鋰動力電池組不一致性的機理和外在參數(shù)表現(xiàn),最終確定了以工作電壓作為均衡變量來體現(xiàn)電池組的不一致性。3、根據(jù)DC-DC變換型拓?fù)浣Y(jié)構(gòu),設(shè)計了能量非耗散型儲能電感對稱均衡拓?fù)浣Y(jié)構(gòu)。通過分析了該均衡電路的工作原理,設(shè)計的結(jié)構(gòu)參數(shù),并對電路和參數(shù)進(jìn)行了仿真驗證。在此拓?fù)浣Y(jié)構(gòu)進(jìn)行均衡策略的設(shè)計,提出充電和駐停兩種工況下的均衡策略設(shè)計,并對其進(jìn)行仿真驗證。4、在均衡電路理論和仿真的平臺上,本文確立了均衡系統(tǒng)的整體方案,完成了個均衡系統(tǒng)的軟硬件設(shè)計。整個系統(tǒng)分為檢測部分、均衡控制部分、均衡執(zhí)行部分。硬件采用模塊化結(jié)構(gòu)設(shè)計電路,并在處理器中實現(xiàn)了兩種不同工況的均衡策略,其中放電均衡用駐停均衡來模擬。5、搭建實驗平臺,實現(xiàn)了實驗結(jié)果與理論要求的匹配。驗證了能量非耗散型儲能電感對稱均衡系統(tǒng)的正確性。
[Abstract]:Electric vehicles are well recognized by the public for saving energy and improving the environment. The power source of electric vehicle, power battery pack, is the key factor to determine the performance of electric vehicle. The battery pack consists of several electric cells in series to provide energy for electric vehicles. Because of manufacturing and process defects, even the same type of battery will be different. In addition, in the driving process, the power cell will carry out several cycles of charge and discharge, which will lead to the expansion of the inconsistency of the battery pack, resulting in the overcharge and discharge of individual cells. This not only reduces the battery life, but also may cause safety accidents. Therefore, to ensure the consistency of electric vehicle batteries has become the top priority of current battery management. In this paper, a series of research and analysis on the above phenomena are carried out, and the contribution of new energy electric vehicles to the change of automobile industry in environmental protection and energy resources and the future development trend are expounded from the hot spots at home and abroad, market orientation, and so on. The purpose and significance of power battery equalization technology are analyzed. By comparing the advantages and disadvantages of various vehicle batteries, the advantages of lithium-powered batteries in electric vehicles are analyzed. By comparing and analyzing the advantages and disadvantages of equilibrium topology and equalization strategy at home and abroad, the importance and development of non-energy dissipative equalization technology are introduced, which not only improves the battery life and working efficiency, but also improves the efficiency of battery pack. Moreover, it has a great advantage in saving energy. By studying the inconsistency of battery, the working mechanism of lithium battery and the important parameters of lithium battery are analyzed, and the performance of these parameters in the external characteristics of power battery is analyzed. The charge-discharge characteristics of lithium-powered battery are analyzed, and HPPC and standard charge-discharge experiments are carried out according to the PNGV model. The mechanism of the inconsistency and the performance of external parameters are analyzed through the experiments and data. Finally, the working voltage as the equalization variable is determined to reflect the battery pack inconsistency. According to the DC-DC transform topology, the non-dissipative energy storage inductance symmetric equalization topology is designed. The working principle and structural parameters of the equalization circuit are analyzed, and the circuit and parameters are simulated and verified. In this topology, the equilibrium strategy is designed, and the equilibrium strategy is designed under the two working conditions of charging and standing stop, and it is verified by simulation. On the platform of the equalization circuit theory and simulation, the whole scheme of the equalization system is established in this paper. The software and hardware design of an equalization system is completed. The whole system is divided into detection part, balanced control part and balanced executive part. The circuit is designed with modularized structure, and two kinds of equalization strategies are implemented in the processor. The discharge equalization is simulated by standing stop equalization. The experimental platform is built and the experimental results are matched with the theoretical requirements. The correctness of the non-dissipative energy storage inductive symmetric equalization system is verified.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM912

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本文編號：1814822