No.6（2003）8.New power supply circuit developed by using electrical double-layer-capacitors

Kazumasa MIKAMI, Takeshi KOBAYASHI and Shoichi HIRATSUKA

We developed new power supply circuits using electrical double layer capacitors (EDLC). To achieve this, we devised parallel monitoring measurement system of electrical properties. Charging and emitting characteristics of EDLC were measured using this system. The characteristics were compared with conventional batteries and we confirmed that the internal resistance of the EDLC was relatively low. Based on these results, new power supply circuits using EDLC were designed and evaluated by applying them to an electric bicycle and a solar cell system. In this way, the transient properties of the motor were improved. This indicates that future work will significantly improve the life of the batteries.

Keywords
Electrical double-layer-capacitors(EDLC), Battery, Electric bicycle

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