Adaptive Observer for Charge-State and Crossover Estimation in Disproportionation Redox Flow Batteries undergoing Self-Discharge
| Autor: | David A. Howey, Charles W. Monroe, Pedro Ascencio, Kirk Smith |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Lyapunov function
020209 energy Crossover Linear matrix inequality 02 engineering and technology 021001 nanoscience & nanotechnology Flow battery symbols.namesake State of charge Optimization and Control (math.OC) Control theory Convex optimization FOS: Mathematics 0202 electrical engineering electronic engineering information engineering symbols 0210 nano-technology Mathematics - Optimization and Control Self-discharge Separator (electricity) |
| Zdroj: | ACC Scopus-Elsevier |
| DOI: | 10.23919/acc.2019.8814764 |
| Popis: | This article considers a model formulation and an adaptive observer design for the simultaneous estimation of the state of charge and crossover flux in disproportionation redox flow batteries. This novel nonaqueous battery chemistry allows a simple isothermal lumped parameter model to be formulated. The transport of vanadium through the porous separator is a key unknown function of battery variables and it is approximated in the space of continuous functions. The state and parameter observer adaptation laws are derived using Lyapunov analysis applied to the estimation error, the stability and convergence of which are proved. Numerical values of observer gains are calculated by solving a polytopic linear matrix inequality and equality problem via convex optimization. The performance of this design is evaluated on a laboratory flow battery prototype, and it is shown that the crossover flux can be considered a linear function of state of charge for this battery configuration during self-discharge. |
| Databáze: | OpenAIRE |
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