Journal ArticleDOI
Power and life extension of battery-ultracapacitor hybrids
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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
Distributed Active Resonance Suppression in Hybrid DC Power Systems Under Unbalanced Load Conditions
Ehsan Jamshidpour,Babak Nahid-Mobarakeh,Philippe Poure,Serge Pierfederici,Farid Meibody-Tabar,Shahrokh Saadate +5 more
TL;DR: In this paper, a distributed active oscillation suppression approach is presented to overcome the resonance under unbalanced load conditions and allows reducing dc link and LC filter capacitors for weight saving.
Journal ArticleDOI
Charge Allocation in Hybrid Electrical Energy Storage Systems
TL;DR: This paper is the first to formally describe the global charge allocation problem in HEES systems, namely, distributing a specified level of incoming power to a subset of destination EES banks so that maximum charge allocation efficiency is achieved.
Journal ArticleDOI
Electrical Double-Layer Capacitors in Hybrid Topologies —Assessment and Evaluation of Their Performance
Noshin Omar,Mohamed Ali Abdelfattah Hamoda Daowd,Omar Hegazy,Peter Van Den Bossche,Thierry Coosemans,Joeri Van Mierlo +5 more
TL;DR: In this article, the characteristics of these topologies have been analyzed and compared based on a newly developed hybridization simulation tool for association of lithium-ion batteries and EDLCs.
Journal ArticleDOI
A Step-Up Bidirectional Series Resonant DC/DC Converter Using a Continuous Current Mode
TL;DR: In this paper, the authors present the analysis and design of a novel technique that allows the conventional series resonant dc/dc converter (SRC) to work as a step-up and step-down converter.
References
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Book
Electrochemical Supercapacitors : Scientific Fundamentals and Technological Applications
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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.
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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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