Ressel, S.; Bill, F.; Holtz, L.; Janshen, N.; Chica, A.; Flower, T.; Weidlich, C.... (2018). State of charge monitoring of vanadium redox flow batteries using half cell potentials and electrolyte density. Journal of Power Sources. 378:776-783. https://doi.org/10.1016/j.jpowsour.2018.01.006
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/141422
Title:
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State of charge monitoring of vanadium redox flow batteries using half cell potentials and electrolyte density
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Author:
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Ressel, Simon-Philipp
Bill, Florian
Holtz, Lucas
Janshen, Niklas
Chica, Antonio
Flower, Thomas
Weidlich, Claudia
Struckmann, Thorsten
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UPV Unit:
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Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
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Issued date:
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Abstract:
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[EN] The operation of vanadium redox flow batteries requires reliable in situ state of charge (SOC) monitoring. In this study, two SOC estimation approaches for the negative half cell are investigated. First, in situ open ...[+]
[EN] The operation of vanadium redox flow batteries requires reliable in situ state of charge (SOC) monitoring. In this study, two SOC estimation approaches for the negative half cell are investigated. First, in situ open circuit potential measurements are combined with Coulomb counting in a one-step calibration of SOC and Nernst potential which doesn't need additional reference SOCs. In-sample and out-of-sample SOCs are estimated and analyzed, estimation errors ¿ 0.04 are obtained. In the second approach, temperature corrected in situ electrolyte density measurements are used for the first time in vanadium redox flow batteries for SOC estimation. Insample
and out-of-sample SOC estimation errors ¿ 0.04 demonstrate the feasibility of this approach. Both methods allow recalibration during battery operation. The actual capacity obtained from SOC calibration can be used in a state of health model.
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Subjects:
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Redox flow battery
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Vanadium redox flow battery
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State of charge
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State of health
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Half cell potential
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Electrolyte density
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Copyrigths:
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Cerrado |
Source:
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Journal of Power Sources. (issn:
0378-7753
)
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DOI:
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10.1016/j.jpowsour.2018.01.006
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Publisher:
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Elsevier
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Publisher version:
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https://doi.org/10.1016/j.jpowsour.2018.01.006
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Project ID:
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BMBF/FKZ:03FS0436A
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Thanks:
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This work was done within the research project tubulAir +/- and was supported by the German Federal Ministry of Education and Research (BMBF FKZ: 03FS0436A). The authors thank Alexander von Stryk (HAW, implementation of ...[+]
This work was done within the research project tubulAir +/- and was supported by the German Federal Ministry of Education and Research (BMBF FKZ: 03FS0436A). The authors thank Alexander von Stryk (HAW, implementation of test rig), SGL Carbon (providing electrode material) and FUMATECH BWT GntbH (providing membrane material).
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Type:
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Artículo
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