請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21386
標題: | 脈衝充放電對蓄電池的老化影響 Effect of Pulse Charge and Discharge on Battery Life Cycle |
作者: | Chang-Han Xie 謝昌翰 |
指導教授: | 李坤彥(Kung-Yen LEE) |
關鍵字: | 脈衝充放電, Pulse activation, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 本研究旨在探討脈衝充放電對提升蓄電池循環壽命影響,利用脈衝充電和脈衝放電對蓄電池充放電,並和定電流充放電的蓄電池進行比對測試,分析差異和結果。
在脈衝充電研究中,將出廠前的蓄電池放電至低電位,以500Hz、平均0.3C電流將電池充飽,此過程稱為脈衝活化。將活化後的蓄電池放置50oC高溫環境中進行深循環定電流連續充放電。每20次循環後,做一次標準充放電曲線量測。並將活化一次、活化三次的蓄電池與對照組(定電流充放電)進行比較。 在脈衝放電研究中,利用自製的脈衝放電控制器,在常溫下進行深循環充放電,每20次循環後,做一次標準充放電曲線量測,探討脈衝放電頻率500Hz、2000Hz,平均放電電流為0.2C對蓄電池的影響,並分析瞬間電流值1C、與3C對蓄電池的老化影響。 脈衝充電活化研究中,針對兩種鉛酸電池:鉛碳電池(TNC-65P)與膠體電池(TNG-12P)。鉛碳電池的研究結果顯示:活化一次和活化三次的鉛碳電池之性能(SOH)在高溫循環初期(約20次)較未活化的鉛碳電池之性能(SOH)來的優異,儲電量高出約10%左右;膠體電池的研究結果顯示:在20~40次循環後,活化三次的電池之性能(SOH)較未活化的電池之儲電量高出約10~15%,但三者的性能差距逐漸縮小。60次循環下,性能差異不大。證明在此條件測試下,出廠前用脈衝充電活化蓄電池的可行性,因本研究採用加速老化測試循環充放電(0.3C),遠高於額定值(0.1C),壽命至少縮短兩倍以上。電池老化過程的電化學反應為不可逆,採加速老化測試時,一旦進入急速老化區(40次循環以上),就無法分辨活化的影響,但由初期的成果已可分辨出出廠活化的可行性。實際上的情形仍進行0.1C的充放電循環測試,才能準確判定。 在脈衝放電的實驗中,研究結果顯示定電流放電與脈衝放電對TNG-12P電池老化的影響不同,在500Hz的電池性能狀況最佳,隨著深循環次數增加,儲電量較定電流高。又經由比對測試,不同的瞬間電流峰值,對電池老化的影響亦不同,在瞬間3C放電下,其性能比瞬間1C放電來的優異,其中又以500Hz-3C儲電量最多,可以得知TNG-12P常溫環境下採500Hz-3C脈衝放電,可以提升壽命。 The objective of this study was to increase the cycle life of rechargeable batteries. The result of pulse charge and discharge and that of constant-current charge and discharge were analyzed and compared. In the pulse charge experiment, a new rechargeable battery with a low electric potential charged at 500 Hz and 0.3C to reach a full charge. This process was defined as pulse activation. The activated rechargeable battery was placed at a high-temperature environment (50°C) to undergo deep-cycle constant-current discharge. Standard measurement of charge-discharge curve was conducted every 20 cycles, and the rechargeable batteries that were activated one time and three times were compared with the control group (batteries undergoing constant-current charge and discharge). In the pulse discharge experiment, a self-made pulse discharge control board was used for the deep-cycle charge and discharge at room temperature. Standard measurement of charge-discharge curve was conducted every 20 cycles to investigate the influence of using discharge frequencies of 500 Hz and 2000 Hz and an average current of 0.2C on the rechargeable battery and explore the difference in aging between rechargeable batteries with instantaneous current values of 1C and 3C. In the activation experiment with pulse charge, two types of rechargeable batteries were used: lead carbon batteries and GEL batteries. The results of the lead carbon batteries showed that the state of health (SOH) of the batteries that were activated one time and three times was approximately 10% higher than that of the inactivated batteries at high temperature early in the cycle life (the first 20 cycles). After 20 cycles, the three batteries did not show distinct difference. The results of the GEL batteries revealed that the SOH of the battery activated three times was higher than that of the inactivated batteries by approximately 15% after 20 cycles. In addition, after 40 cycles, the SOH of the activated batteries was higher than that of the inactivated battery by approximately 10%. However, the SOH difference between the three batteries decreased gradually. After 60 cycles, the three batteries did not have noticeable difference in SOH. The results verified that using pulse charge to activate rechargeable batteries under this experiment condition can improve the SOH of batteries at high temperature in the early stage of deep cycle. In the pulse discharge experiment, research results showed that constant-current discharge and pulse discharge had different effects on battery aging. The batteries exhibited the optimal SOH at 500 Hz. As the number of deep cycles increased, the SOH of the pulse discharge battery surpassed that of the constant-current discharge battery. A comparison testing indicated that the instantaneous peak value of current also had different effects on battery aging. The pulse discharge battery undergoing instantaneous 3C discharge had a SOH superior to that undergoing instantaneous 1C discharge, and the amount of discharge was the highest at a discharge frequency of 500 Hz and an instantaneous current value of 3C. This indicated that 500 Hz-3C was the optimal pulse discharge frequency at room temperature. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21386 |
DOI: | 10.6342/NTU201902877 |
全文授權: | 未授權 |
顯示於系所單位: | 工程科學及海洋工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-108-1.pdf 目前未授權公開取用 | 3.11 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。