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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Book ChapterDOI
Preparation and properties of manipulated carbon nanotube composites and applications
TL;DR: An overview of the structure, properties, and applications of carbon nanotubes can be found in this article, where an account of the potential practical use of CNTs and their composites in electrochemical energy storage, hydrogen storage, field emission, and electrochemical sensors is given.
Journal ArticleDOI
Controls of hybrid energy storage systems in microgrids: Critical review, case study and future trends
TL;DR: In this article , the authors analyzed and compared the control methods of the hybrid energy storage system (HESS) in microgrid as well as to identify the shortcomings of the existing control methods.
Journal ArticleDOI
Hybrid Energy Storage Systems: Concepts, Advantages, and Applications
TL;DR: In this paper, a brief overview of the HESS, highlighting its advantages for a wide range of applications, is addressed, and a hybrid ESS (HESS) which involves two or more ESS technologies is presented.
Proceedings ArticleDOI
Battery-supercapacitor hybrid energy storage system with reduced low frequency input current ripple
TL;DR: In this paper, a current-feedback ripple current reduction method is applied to a single-phase battery-supercapacitor HESS in order to alleviate the second-order harmonic supercapACitor current component.
Proceedings ArticleDOI
Design and analysis of a current-mode controlled battery/ultracapacitor hybrid
Shengyi Liu,Roger A. Dougal +1 more
TL;DR: In this article, the design and analysis of a current-mode controlled battery/ultracapacitor hybrid operated with a pulsed power load is presented, and a Ragone-type plot is constructed based on the steady-state analysis for power and efficiency design and optimization.
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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