Lu, M, Fan, Y and Chong, B (2021) A Novel Comprehensive SOC-Voltage Control Scheme for Lithium-ion Battery Equalization. In: 2020 International Conference on Power, Instrumentation, Control and Computing (PICC). 2020 International Conference on Power, Instrumentation, Control and Computing (PICC), 17-19 Dec 2020, Thrissur, India. IEEE , pp. 1-6. ISBN 978-1-7281-7591-1
Abstract
This paper proposes a novel comprehensive state of charge (SOC) and voltage control scheme for battery equalization. For the circuit topology, the equalizers contain balancing circuits based on buck-boost converter topology, which can guarantee bi-directional power flow between battery cells, and each cell is corresponding to one balancing circuit. For the control scheme, real time SOC of each cell is measured to determine the switching state of each balancing circuit so that equalization path can be changed accordingly. Real time voltage is also measured to minimize the load voltage ripple. PI controller is then applied to regulate both SOCs and voltages across the battery cells through the adjustment of the switching duty ratios, thus making a trade-off between equalization speed and battery voltage fluctuations. The circuit topology is constructed in SIMULINK while the control algorithm is implemented in MATLAB. Simulation results of SOC, voltage and current are obtained to validate the control design.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Keywords: | buck-boost converter; PI controller; equalizing speed; voltage fluctuation; lithium-ion battery |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Communication & Power Networks (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Mar 2021 12:09 |
Last Modified: | 15 Mar 2021 12:09 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/PICC51425.2020.9362458 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:172062 |