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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Proceedings ArticleDOI
Runtime Extension of Autonomous Sensors Using Battery-Capacitor Storage
TL;DR: Batteries are an important part in autonomous sensors power supply chain, so extracting all available energy is a determinant runtime affair and battery-capacitor hybrids are proposed to reduce voltage drops in autonomous sensor.
Proceedings ArticleDOI
An approach to provide ride-through for ASD systems with supercapacitors
TL;DR: In this article, the use of super-capacitors to provide ride-through for voltage sags and short-term voltage interruptions is explored, and a compensator topology is evaluated analytically and experimentally.
Journal ArticleDOI
Control strategy to improve EV range by exploiting hybrid storage units
TL;DR: A real-time implementation of the control strategy on which the optimal sizing procedure was based is proposed and analysed using the results of simulation tests.
Journal ArticleDOI
Combination of Supercapacitor and AC Power Source in Storing and Supplying Energy for Computer Backup Power
Abstract: This paper presents the charge and discharge combination of the supercapacitors and the AC power source in storing and supplying energy for computer backup power. According to the behavior of storing and supplying energy, the SC can be charged with high currents. Whereas the battery cannot. The supercapacitors efficiency in storing and supplying power at high voltage and low current is 95.20%. An analysis also revealed that the charging time of the supercapacitors is less than 199 s. The combination of the supercapacitors and the battery required 604 s for charging time. The battery alone is the longest at 1080 s. Moreover, the study showed that the discharging time of the supercapacitors and the battery combination was more than 610 s. The discharging time of the battery and the supercapacitors were 285 and 579 s, respectively. Therefore, the combination of the supercapacitors and an AC power source can replace battery in the design of computer backup.
Proceedings ArticleDOI
Optimal Sizing and Cost Analysis of Battery/Supercapacitor Alone and in Combination for E-Rickshaw Application
TL;DR: A case study has been carried out in order to perform a cost analysis of best possible Energy Storage System (ESS/HESS) in an E-rickshaw on a known route and active topology based lithium-ion battery and supercapacitor prove to be the best choices in 5 and 10 years of vehicle lifetime respectively.
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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