本文關(guān)鍵詞： FPGA 超級電容器 充放電 電壓均衡 VGA顯示　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：超級電容器是一種新型的綠色儲能器件,具有功率密度高,充放電速度快,使用壽命長等優(yōu)點(diǎn),在電動汽車、新能源開發(fā)等領(lǐng)域具有廣闊的發(fā)展空間。在實(shí)際使用中,為了滿足系統(tǒng)對電壓和能量等級的需求,必須通過若干個超級電容器的串并聯(lián)組合構(gòu)成電容組模塊。串聯(lián)電容組在充放電過程中,由于各單體之間參數(shù)的離散性,會出現(xiàn)電壓不均衡現(xiàn)象,這將嚴(yán)重影響超級電容器的使用壽命和儲能效率。因此,電壓均衡技術(shù)的研究對超級電容器發(fā)展具有至關(guān)重要的意義。本文針對超級電容器充放電電壓不均衡的問題,在對現(xiàn)有均衡技術(shù)分析的基礎(chǔ)上,提出了一種新型充放電均衡系統(tǒng),該系統(tǒng)采用FPGA為主控制器,還包括AD模塊,開關(guān)網(wǎng)絡(luò)1和2,電壓轉(zhuǎn)換電路以及VGA顯示模塊等。AD模塊采集超級電容器組中各個單體的電壓數(shù)據(jù),FPGA對采集的數(shù)據(jù)進(jìn)行處理,然后控制開關(guān)網(wǎng)絡(luò)的切換,其中,開關(guān)網(wǎng)絡(luò)1控制中間儲能器件飛渡電容器,實(shí)現(xiàn)能量從高電壓單體到低電壓單體的轉(zhuǎn)移;與此同時,開關(guān)網(wǎng)絡(luò)2控制電壓轉(zhuǎn)換模塊輸出的穩(wěn)定電壓,給電容組中電壓最低單體進(jìn)行充電。與現(xiàn)有均衡技術(shù)相比,由于兩路均衡措施同步運(yùn)行,可以達(dá)到更好的均衡效果。另外,本系統(tǒng)還設(shè)有VGA顯示模塊,便于對系統(tǒng)運(yùn)行狀態(tài)的監(jiān)控,極大地提高了系統(tǒng)的實(shí)用性。最后,對系統(tǒng)的均衡效果進(jìn)行實(shí)驗(yàn)測試,通過數(shù)據(jù)分析可以看出,采用此系統(tǒng)進(jìn)行均衡后,在充電過程中超級電容組單體電壓具有較好的一致性。本系統(tǒng)在充電、放電、同時充放電環(huán)節(jié)都可以應(yīng)用,而且系統(tǒng)體積較小,可用于便攜場合。與現(xiàn)有均衡技術(shù)相比,在單體電壓差較小時,本論文設(shè)計(jì)的方案具有更好的均衡效果,從而達(dá)到延長超級電容器使用壽命的目的。
[Abstract]:Supercapacitor is a new type of green energy storage device, with the advantages of high power density, fast charge and discharge speed, long service life, etc. It has a wide development space in electric vehicles, new energy development and other fields. In order to meet the demand of voltage and energy level of the system, the series and parallel combination of several supercapacitors must be used to form the capacitor group module. Voltage imbalance will occur, which will seriously affect the service life and energy storage efficiency of supercapacitors. The study of voltage equalization technology is of great significance to the development of supercapacitors. In this paper, based on the analysis of existing equalization techniques, the charge and discharge voltage imbalance of supercapacitors is discussed. In this paper, a new charging and discharging equalization system is proposed. The system adopts FPGA as the main controller, and also includes AD module. Switching network 1 and 2, voltage conversion circuit and VGA display module. AD module collects voltage data of each unit in supercapacitor bank and then controls switching of switch network. Switching network 1 controls the intermediate energy storage device to transfer energy from high voltage unit to low voltage unit, while switching network 2 controls the output voltage of voltage conversion module. Compared with the existing equalization technology, the two equalization measures can achieve better equalization effect. In addition, the system also has a VGA display module. It is convenient to monitor the running state of the system, which greatly improves the practicability of the system. Finally, the equilibrium effect of the system is tested experimentally. Through the data analysis, it can be seen that after the system is balanced, This system can be used in charge, discharge, charge and discharge links, and the system is small and can be used for portable applications. Compared with the existing equalization technology, the system can be used in portable applications. When the cell voltage difference is small, the scheme designed in this paper has better equalization effect, thus prolonging the service life of supercapacitor.
【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】：2014
【分類號】：TM53

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本文編號：1506129