Next Article in Journal
Dependence of Total Production Costs on Production and Infrastructure Parameters in the Polish Hard Coal Mining Industry
Previous Article in Journal
Modeling and Static Analysis of Primary Consequent-Pole Tubular Transverse-Flux Flux-Reversal Linear Machine
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Energies 2017, 10(10), 1482; https://doi.org/10.3390/en10101482

Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits

1
Intelligent Manufacturing Institute, Hefei University of Technology, 193 Tunxi Road, Hefei 230000, China
2
School of Electrical and Data Engineering, University of Technology Sydney, 81 Broadway, Sydney, NSW 2007, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Hai-Wen Li
Received: 5 August 2017 / Revised: 14 September 2017 / Accepted: 20 September 2017 / Published: 25 September 2017
(This article belongs to the Section Electrical Power and Energy System)
Full-Text   |   PDF [4340 KB, uploaded 25 September 2017]   |  

Abstract

Battery equalization can increase batteries’ life cycle, utilization, and reliability. Compared with battery equalization topologies based on resistance or energy storage components, the topologies based on transformers have the advantages of high balancing current and efficiency. However, the existence of switching losses will reduce the reliability and service life span of the equalization circuit. Aiming at resolving this problem, a new battery equalization topology by fly-back transformer with an absorbing circuit is proposed in this paper. Compared with other transformer-based topologies, it can decrease switching losses because the voltage/current spike is solved by the absorbing circuit which is composed of inductance, capacitance and diode (LCD), and it can also maintain a high balancing current of about 1.8 A and high efficiency of about 89%, while the balancing current and efficiency of other topologies were usually 1.725 A/1.5 A and 80%/80.4%. The working principle of the balancing topology and the process of soft switching are analyzed and calculated in the frequency domain. Due to the addition of the LCD absorbing circuit, soft switching can be realized to reduce the switching losses while the high equalization speed and efficiency are still maintained. The corresponding control strategy of the balancing topology is also proposed and the timely balancing is achieved. The theoretical analysis is verified by simulation and experimental results. View Full-Text
Keywords: battery equalization; fly-back transformer; absorbing circuit; soft switching; frequency domain battery equalization; fly-back transformer; absorbing circuit; soft switching; frequency domain
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Liu, X.; Sun, Y.; He, Y.; Zheng, X.; Zeng, G.; Zhang, J. Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits. Energies 2017, 10, 1482.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top