Proceedings ArticleDOI
On the Combination of Double-Layer Capacitors and Switching Converters
K. Harada,E. Sakai,K. Murata,S. Muta,K. Yamasaki +4 more
- pp 119-126
TLDR
In this paper, the characteristics of electric doubie-layer capacitors (EDLCs) controlled by switching converters are analyzed and the maximum operating time, the energy availability versus the average output power of the system are analyzed.Abstract:
The characteristics of electric doubie-layer capacitors (EDLCs) controlled by switching converters are in& clear. The maximum operating time, the energy availability versus the average output power of the system are analyzed. The selection policies of the series and/or parallel combination of EDLCs and the type of switching converter, that is, buck, boost and buck-boost, are discussed. As a result, the inforination to make a practical design easy has been obtained.read more
Citations
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Proceedings ArticleDOI
Switching converters using double-layer capacitors as power backup
TL;DR: In this article, a switching power converters using electric double-layer capacitors (EDLCs) as power backup are presented, where the configurations of these circuits are very simple and the number of components in each converter is very small.
Journal Article
Wireless Rapid Charger of Super Capacitor
Eiji Sakai,Hiroshi Sakamoto +1 more
TL;DR: In this paper, the fundamental characteristics of the wireless rapid charger of super capacitor were investigated by experiments and simulation, and the frequency control method that can do the rapid charge regardless of the relative position of the windings of the noncontact transformer was proposed.
References
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Journal ArticleDOI
A basic study on power storage capacitor systems
Abstract: Storage batteries or pumped hydraulic power stations have been used to store electric energy. However, there are problems with storage batteries, e.g., long charging time, limited cycle life, low Coulomb efficiency, and inaccurate residual power meters. Because of these problems, practical power applications have not been achieved.
To solve these problems, a complex system of capacitors and electronic circuits called the ECS (Energy Capacitor System) is proposed. The capacitor part of the ECS is a group of electric double-layer capacitors of increased energy density. The circuits part is built around switching regulators. Although the capacitors alone are not capable of delivering stable output, the accompanying circuits compensate for various characteristics throughout the charge and discharge cycle.
This combination of capacitors and electronic circuits increases the energy density by about 16 times that of the conventional electric double-layer capacitors, close to the level of lead-acid batteries but with lower output resistance and better voltage stability. The ECS inherently features short charging time, very long cycle life, and good Coulomb efficiency. The cells are completely sealed and made from materials which are not harmful to the environment.
Proceedings ArticleDOI
Basic characteristics of electric double-layer capacitors controlled by switching converters
TL;DR: In this article, the basic characteristics of electric double-layer capacitors controlled by switching converters are analyzed and confirmed by experiments and a practical design is easier by the information obtained in the analysis.
Proceedings ArticleDOI
Improvement on Self-Discharge Characteristic of an Electric Double Layer Capacitor
TL;DR: In this paper, an electric double layer capacitance (EDLC) was developed to provide up to one million microfarads capacitance in less than one cubic inches, which made the EDLC useful as a non-battery, on-board backup power source.
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