新式交流阻抗法用以改善電池充電狀態; AC Impedance Method for Improving Battery Charging Status

NCUIR > College of Electrical Engineering & Computer Science > Graduate Institute of Electrical Engineering > Electronic Thesis & Dissertation > Item 987654321/10380

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/10380

Title:	新式交流阻抗法用以改善電池充電狀態;AC Impedance Method for Improving Battery Charging Status
Authors:	蕭晴文;Ching-Wen Hsiao
Contributors:	電機工程研究所
Keywords:	充電;阻抗量測;Charge;Impedance measurement
Date:	2009-07-20
Issue Date:	2009-09-22 12:14:39 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本論文使用新式交流阻抗充電法對電池充電，藉由電化學分析儀(IM6-ex)，量測電池的阻抗圖，找尋電池最低阻抗值的頻率，再使用此頻率對電池充電，在同樣初始的電池狀態下，使用交流阻抗充電法和一般直流充電法對電池充電，經過放電實驗，交流阻抗充電法增加了近4~5%的放電時間，意味著交流阻抗充電法能夠提高充電效率，更透過電池等效電路的建立與分析，在充電時能夠抑制電池內阻的上升，降低內阻能量損失所造成的溫升效應，進而增加電池的使用壽命。 This study used a new DC-plus-AC charging method to improve the charging efficiency of NiMH batteries. An electrochemical impedance analyzer scanned the impedance of the battery under study in order to find the frequency of the lowest impedance. The battery was then charged with a DC current plus an AC current of that frequency. The impedance scanning process and the charging process repeated for three times. A subsequent discharging process showed that the DC-plus-AC charging method increased the charged energy by 4-5%. The impedance spectroscopy accompanying the charging process demonstrated the new method’s ability in prohibiting impedance increasing of the battery due to the charging process. A new circuit model was developed to represent the electric property of NiMH batteries with a model error of only 0.2%.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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