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Title: Real-time monitoring of capacity loss for vanadium redox flow battery
Authors: Wei, Zhongbao
Bhattarai, Arjun
Zou, Changfu
Meng, Shujuan
Lim, Tuti Mariana
Skyllas-Kazacos, Maria
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Wei, Z., Bhattarai, A., Zou, C., Meng, S., Lim, T. M., & Skyllas-Kazacos, M. (2018). Real-time monitoring of capacity loss for vanadium redox flow battery. Journal of Power Sources, 390, 261-269. doi:10.1016/j.jpowsour.2018.04.063
Journal: Journal of Power Sources
Abstract: The long-term operation of the vanadium redox flow battery is accompanied by ion diffusion across the separator and side reactions, which can lead to electrolyte imbalance and capacity loss. The accurate online monitoring of capacity loss is therefore valuable for the reliable and efficient operation of vanadium redox flow battery system. In this paper, a model-based online monitoring method is proposed to detect capacity loss in the vanadium redox flow battery in real time. A first-order equivalent circuit model is built to capture the dynamics of the vanadium redox flow battery. The model parameters are online identified from the onboard measureable signals with the recursive least squares, in seeking to keep a high modeling accuracy and robustness under a wide range of working scenarios. Based on the online adapted model, an observer is designed with the extended Kalman Filter to keep tracking both the capacity and state of charge of the battery in real time. Experiments are conducted on a lab-scale battery system. Results suggest that the online adapted model is able to simulate the battery behavior with high accuracy. The capacity loss as well as the state of charge can be estimated accurately in a real-time manner.
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2018.04.063
Rights: © 2018 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles


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