著者

福島 志斗 福間 眞澄 岸田 悟 李 相錫 吉野 勝美

出版者

一般社団法人 電気設備学会

雑誌

電気設備学会 論文誌 (ISSN:24334472)

巻号頁・発行日

vol.38, no.3, pp.17-22, 2018 (Released:2018-09-11)

参考文献数

5

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We develop a power supply that can repeatedly charge and discharge for a renewable energy by using the electric double layer capacitor (EDLC) and a photovoltaic module. We also fabricate the EDLC (charcoal EDLC) for the power supply, which is made of a charcoal and a water-based electrolyte. The charcoal EDLC has a high-safety performance due to the structure of incombustibility and the resistance to the invasion of the water. We fabricate an outdoor lighting system by using the charcoal EDLC and investigate the problems for the long-term operation. The outdoor light system is constructed with the charcoal EDLC (60 Wh), the photovoltaic module (60 W), the LED light device (6 W) and our original control circuit. The results of demonstration experiments show that the developed outdoor light system operates as a power supply for a LED light device in the nighttime in a high efficiency. It is confirmed that the system operates for a long time, but the results also show that there are problems such as incomplete charcoal EDLC sealing and electric resistance rise due to electric terminal corrosion from the test results for 2 years and 4 months after installation.

著者

福間 眞澄 内田 孝幸 福島 志斗 小川 仁一 吉野 勝美

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.134, no.5, pp.299-306, 2014 (Released:2014-05-01)

参考文献数

16

被引用文献数

3 3

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The electric double layer capacitor (EDLC) electrode is made of carbonized and activated materials. The material surface and electrical characteristics of carbon materials produced from low cost organic materials were examined. First, a cotton cloth was carbonized and activated, and its optimal time and temperature of carbonization and activation processing were examined. And, its surface area, pore volume and pore size distributions were analyzed. Second, activated carbons were applied to the electrodes of 1Wh class EDLC cell with water electrolyte solution. The capacitances and internal resistances of the assembled EDLC cell were measured by a charge and discharge circuit using constant voltage source. And, the charge and discharge cycle test was performed on these assembled EDLC cells under practical use condition. As a result, EDLC cells using the activated carbon with large surface area of 1300m2/g showed the high density of capacitance 0.5-1.1F/cm2. The internal resistances of EDLC cells were less than 0.34W. It was also found that the EDLC cells had no deterioration in the charge and discharge cycle test under practical condition. It shows that the activated carbon made of cotton cloth contributes to the low cost and safety electrode of an EDLC.

著者

福間 眞澄

出版者

松江工業高等専門学校

雑誌

基盤研究(C)

巻号頁・発行日

2008

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パルス静電応力(PEA:Pulsed Electro-Acoustic)法は,誘電体中の電荷分布を測定する技術であり絶縁材料の信頼性評価等に広く利用されている。高分子絶縁材料中の空間電荷は三次元に分布し,かつ過渡的に変化するため多次元かつ短時間間隔で測定可能な測定装置の開発も望まれている。これまで複数の圧電素子(センサ)を用いた短時間間隔で測定可能な2次元空間電荷分布装置が開発されている。しかしながら,従来の装置は複数のセンサ信号を同時に測定記録するためにセンサ数のA/D変換器(ADC)が必要で装置コストが掛るなどの問題があった。本研究ではこの問題点を改善するために短時間で複数のセンサ信号を切替え平均化し記録する空間電荷分布測定装置を試作した。