Journal ArticleDOI
Power and life extension of battery-ultracapacitor hybrids
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TLDR
In this article, the performance of a battery-ultracapacitor hybrid power source under pulsed load conditions is analyzed using simplified models, and the authors show that peak power can be greatly enhanced, internal losses can be considerably reduced, and that discharge life of the battery is extended.Abstract:
The performance of a battery-ultracapacitor hybrid power source under pulsed load conditions is analytically described using simplified models. We show that peak power can be greatly enhanced, internal losses can be considerably reduced, and that discharge life of the battery is extended. Greatest benefits are seen when the load pulse rate is higher than the system eigenfrequency and when the pulse duty is small. Actual benefits are substantial; adding a 23 F ultracapacitor bank (3 /spl times/ 7 PC10 ultracapacitors) in parallel with a typical Li-ion battery of 7.2 V and 1.35 A hr capacity can boost the peak power capacity by 5 times and reduce the power loss by 74%, while minimally impacting system volume and weight, for pulsed loads of 5 A, 1 Hz repetition rate, and 10% duty.read more
Citations
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Journal ArticleDOI
Passive Hybrid Storage Systems: Influence of Circuit and System Design on Performance and Lifetime
TL;DR: In this article, different lithium ion technologies are connected with different supercapacitor technologies directly in parallel, and model-based investigations show how the energy and power density characteristics of such systems differ from each other and which advantages can be achieved in comparison to commercial systems.
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A self-reliant avian bio-logger: energy storage considerations
TL;DR: In this paper, the authors present an analysis of a self-reliant avian bio-logger for long-term migration studies, which is capable of wirelessly transmitting its saved data to a base station.
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Thermochemistry and Equilibration Time Scales for a Rechargeable Lithium Ion Battery
TL;DR: In this article, the open terminal voltage of a lithium ion battery is measured at temperatures ranging from 0 to 50°C in increments of 10°C, and the entropy of the battery reaction is estimated using the established thermochemical relationship between the open terminals voltage and the Gibbs free energy, ΔG.
Proceedings ArticleDOI
An on-line active energy flow split strategy for battery-ultracapacitor energized PMSM driving system
Ruixiang Zheng,Runze Cai,Mian Li +2 more
TL;DR: An on-line energy flow split strategy (EFSS) is proposed to timely tune the amount of energy supplements from battery and ultracapacitor respectively to improve the power supply quality of hybrid energy storage system.
References
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Book
Electrochemical Supercapacitors : Scientific Fundamentals and Technological Applications
TL;DR: In this paper, the double-layer and surface functionalities at Carbon were investigated and the double layer at Capacitor Electrode Interfaces: its structure and Capacitance.
Journal ArticleDOI
Principles and applications of electrochemical capacitors
Rüdiger Kötz,M. Carlen +1 more
TL;DR: In this article, the fundamental principles, performance, characteristics, present and future applications of electrochemical capacitors are presented in this communication, and different applications demanding large ECs with high voltage and improved energy and power density are under discussion.
Journal ArticleDOI
Characterization of double-layer capacitors (DLCs) for power electronics applications
L. Zubieta,R. Bonert +1 more
TL;DR: In this article, the double-layer capacitor (DLC) for power applications is presented, and an equivalent circuit model consisting of three RC branches, one of them with a voltage-dependent capacitance is presented.
Journal ArticleDOI
Measurement and modelling of the high-power performance of carbon-based supercapacitors
TL;DR: In this article, four different testing methods including Impedance Spectroscopy, Constant Current Charging, Cyclic Voltammetry and Power Cycling were applied to each supercapacitor and the results are reviewed.
Journal ArticleDOI
Man portable power needs of the 21st century: I. Applications for the dismounted soldier. II. Enhanced capabilities through the use of hybrid power sources
TL;DR: In this paper, the authors proposed a power source with enough energy to meet the Army's preference for a 72-h mission life before the need for resupply, based on the Single Channel Ground and Airborne Radio System.
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