Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence
Membraneless micro redox flow batteries are an incipient technology that has been shown to extend some properties of traditional redox flow batteries. Due to their microfluidic scale and the absence of membrane, the fluid dynamics operation is critical in the electrical response. In this work, an el...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10121159/ |
| _version_ | 1797805989266718720 |
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| author | Alberto Bernaldo De Quiros Alberto E. Quintero Airan Frances Ange A. Maurice Javier Uceda |
| author_facet | Alberto Bernaldo De Quiros Alberto E. Quintero Airan Frances Ange A. Maurice Javier Uceda |
| author_sort | Alberto Bernaldo De Quiros |
| collection | DOAJ |
| description | Membraneless micro redox flow batteries are an incipient technology that has been shown to extend some properties of traditional redox flow batteries. Due to their microfluidic scale and the absence of membrane, the fluid dynamics operation is critical in the electrical response. In this work, an electrical model is established to evaluate the influence on three battery performance metrics: steady-state power, power transient dynamics, and mixing and self-discharge losses. First, an equivalent electrical circuit, derived from a state-of-the-art regular battery equivalent circuit, is defined by studying the influence of flow changes on its impedances and source, aggregating it as a variable. Then, empirical data are used to demonstrate the proposed equations defining the variation of the electrical response relative to fluid dynamics, and their parameters are identified with grey box methods. The steady-state power model incorporates the interphase position, extending conventionally used redox flow batteries expressions, such as Faraday textasciiacute s Law and Nersnt textasciiacute s equation, for the membraneless analysis. A transient response model is built, which becomes effectively relevant in intermittent power applications (such as many renewable energy storage ones). Finally, mixing and self-discharge losses are evaluated with the variation state of charge at the outputs of the cell, using spectrophotometry measurements, and compared with flowmeter mixing values. This demonstrates that flow-rate values can provide a precise quantification of these losses. The electrical model with dependent parameters from the three fluid dynamics analyses can be used to evaluate the performance of micro membraneless redox flow batteries and their response to fluidic operation. |
| first_indexed | 2024-03-13T06:00:20Z |
| format | Article |
| id | doaj.art-9ba3be03576c4eadabed5325faaf9df8 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-13T06:00:20Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-9ba3be03576c4eadabed5325faaf9df82023-06-12T23:00:56ZengIEEEIEEE Access2169-35362023-01-0111461324614310.1109/ACCESS.2023.327392710121159Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics InfluenceAlberto Bernaldo De Quiros0https://orcid.org/0000-0003-1486-6422Alberto E. Quintero1https://orcid.org/0000-0002-3316-8219Airan Frances2https://orcid.org/0000-0003-3389-0815Ange A. Maurice3Javier Uceda4https://orcid.org/0000-0001-9534-5914Centro de Electrónica Industrial, Universidad Politécnica de Madrid, Madrid, SpainResearch and Development Department, Micro Electrochemical Technologies S.L., Leganés, SpainCentro de Electrónica Industrial, Universidad Politécnica de Madrid, Madrid, SpainDepartamento de Ingeniería Térmica y de Fluidos, Universidad Carlos III de Madrid, Leganés, SpainCentro de Electrónica Industrial, Universidad Politécnica de Madrid, Madrid, SpainMembraneless micro redox flow batteries are an incipient technology that has been shown to extend some properties of traditional redox flow batteries. Due to their microfluidic scale and the absence of membrane, the fluid dynamics operation is critical in the electrical response. In this work, an electrical model is established to evaluate the influence on three battery performance metrics: steady-state power, power transient dynamics, and mixing and self-discharge losses. First, an equivalent electrical circuit, derived from a state-of-the-art regular battery equivalent circuit, is defined by studying the influence of flow changes on its impedances and source, aggregating it as a variable. Then, empirical data are used to demonstrate the proposed equations defining the variation of the electrical response relative to fluid dynamics, and their parameters are identified with grey box methods. The steady-state power model incorporates the interphase position, extending conventionally used redox flow batteries expressions, such as Faraday textasciiacute s Law and Nersnt textasciiacute s equation, for the membraneless analysis. A transient response model is built, which becomes effectively relevant in intermittent power applications (such as many renewable energy storage ones). Finally, mixing and self-discharge losses are evaluated with the variation state of charge at the outputs of the cell, using spectrophotometry measurements, and compared with flowmeter mixing values. This demonstrates that flow-rate values can provide a precise quantification of these losses. The electrical model with dependent parameters from the three fluid dynamics analyses can be used to evaluate the performance of micro membraneless redox flow batteries and their response to fluidic operation.https://ieeexplore.ieee.org/document/10121159/Battery efficiencyelectric equivalent modelgrey box identificationmicrofluidicsredox flow battery |
| spellingShingle | Alberto Bernaldo De Quiros Alberto E. Quintero Airan Frances Ange A. Maurice Javier Uceda Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence IEEE Access Battery efficiency electric equivalent model grey box identification microfluidics redox flow battery |
| title | Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence |
| title_full | Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence |
| title_fullStr | Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence |
| title_full_unstemmed | Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence |
| title_short | Electrical Model of a Membraneless Micro Redox Flow Battery—Fluid Dynamics Influence |
| title_sort | electrical model of a membraneless micro redox flow battery x2014 fluid dynamics influence |
| topic | Battery efficiency electric equivalent model grey box identification microfluidics redox flow battery |
| url | https://ieeexplore.ieee.org/document/10121159/ |
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