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
Model Predictive Control for Multi-Port Modular Multilevel Converters in Electric Vehicles Enabling HESDs
TL;DR: In this paper , a model predictive control (MPC) algorithm for multi-port modular multilevel converters (MP-MMCs) is proposed to enable the use of hybrid energy storage devices (HESDs) in a scalable energy management system (EMS) for electric vehicle (EV) applications.
Proceedings ArticleDOI
Research on Ultracapacitor-Battery Hybrid Power System
TL;DR: In this paper, a hybrid power system composited by ultracapacitor, battery, and Bi-directional DC/DC converter is studied, where the battery pack current has been controlled in reasonable limit which will be helpful to optimize battery pack's working performance to get a longer cycling life, high efficiency and high economy.
Journal ArticleDOI
Optimal control strategy of ultra-capacitors in hybrid energy storage system for electric vehicles
TL;DR: Simulation results have confirmed the good performance of the above strategy in reducing the battery peak charging/discharging current through the proper management of the hybrid energy storage system.
Proceedings ArticleDOI
Cost optimization of a hybrid energy storage system using GAMS
Bhaskarjyoti Das,Ashwani Kumar +1 more
TL;DR: Nonlinear programming (NLP) is used in General Algebraic Modelling Software (GAMS) to solve the optimization problem of the battery and supercapacitor hybrid energy storage system and the results obtained are optimized, better and showed lesser computation time.
Journal ArticleDOI
Development and analysis of a lithium carbon monofluoride battery-lithium ion capacitor hybrid system for high pulse-power applications
TL;DR: In this article, a Li/CF x MnO 2 battery (BA-5790) was hybridized with a 1000-F lithium ion capacitor to allow its use for portable electronic devices requiring 100W 1-min pulses.
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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