Publication
Kazantzis-Kravaris/Luenberger observer for the joint estimation of vanadium flow battery concentrations and side-reaction rates
Journal Article (2025)
Journal
Journal of Energy Storage
Pages
118760
Volume
139
Doc link
https://doi.org/10.1016/j.est.2025.118760
File
Authors
Projects associated
Abstract
This paper introduces a novel observer strategy for estimating active species concentrations and parameters associated with detrimental crossover and oxidative phenomena in vanadium flow batteries. The estimation process is driven by half-cell voltage measurements of each electrolyte against a reference electrode. The posed estimation problem does not satisfy the classical instantaneous observability condition, which excludes the use of most conventional observer design techniques. Accordingly, a different type of observer relying on the much less restrictive property of backward distinguishability is developed to tackle this challenge. This approach enables real-time estimation of parameters related to the undesired processes, facilitating early detection of potential system malfunctions and ensuring accurate concentration estimates, even when these side-reactions occur at high rates. In turn, the concentration estimates allow for the online computation of the system’s State of Charge and State of Health.
Categories
control theory.
Author keywords
Vanadium flow batteries, State observer, Parameter estimation, State of Charge, State of Health
Scientific reference
T.P. Puleston, A. Cecilia, A. Clemente, R. Costa and M. Serra. Kazantzis-Kravaris/Luenberger observer for the joint estimation of vanadium flow battery concentrations and side-reaction rates. Journal of Energy Storage, 139: 118760, 2025.
Follow us!