Equivalent Circuit Model Considering Self-discharge for SOC Estimation of Vanadium Redox Flow Battery

Han, Dong‐Ho; Yoo, Kisoo; Lee, Pyeong-Yeon; Kim, Sanguk; Kim, SeungWoo; Kim, Jong-Hoon

doi:10.23919/icems.2018.8549343

Cited by 18 publications

(15 citation statements)

References 7 publications

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“…Table 6 contains a classification of most relevant RFB models. Equivalent circuit [118][119][120] A VRFB system, can be mainly separated in three different physical models, which are the electrochemical, the thermal and the hydraulic. All of them are interconnected.…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…Finally, there are some studies which use equivalent circuit models, to describe the behaviour of the electrochemical part. An electric circuit model is used in [118,119] to model the state of charge. Another study that uses this type of model to monitor the capacity decay of the VRFB is [120].…”

Section: Electrochemical Modelmentioning

confidence: 99%

“…In this way, measuring both cell voltage and temperature is possible to obtain the SOC estimation. Another electrical model is proposed in [119], which consists on a basic resistor-capacitor (RC) ladder. The capacity of a RFB represents the amount of energy that can be extracted under certain specified conditions [135].…”

Section: State Observers To Estimate the Socmentioning

confidence: 99%

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Redox Flow Batteries: A Literature Review Oriented to Automatic Control

Clemente

Costa‐Castelló

2020

Energies

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This paper presents a literature review about the concept of redox flow batteries and its automation and monitoring. Specifically, it is focused on the presentation of all-vanadium redox flow batteries which have several benefits, compared with other existing technologies and methods for energy stored purposes. The main aspects that are reviewed in this work correspond to the characterization, modeling, supervision and control of the vanadium redox flow batteries. A research is presented where redox flow batteries are contextualized in the current energy situation, compared with other types of energy storage systems. Furthermore, a presentation about the current challenges on research, and the main existing installations is view. A discussion about the main dynamic models that have been proposed during last years, as well as the different control strategies and observers, is presented.

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Section: Mathematical Modelsmentioning

confidence: 99%

Section: Electrochemical Modelmentioning

confidence: 99%

Section: State Observers To Estimate the Socmentioning

confidence: 99%

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Redox Flow Batteries: A Literature Review Oriented to Automatic Control

Clemente

Costa‐Castelló

2020

Energies

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“…In order to overcome the limitations of equivalent circuit based observers such as [26], in this work an electrochemical model combined with a SMO is proposed. Although the basic model is taken from the literature [27], it has been improved to take into account the different over-potentials existing in VRFB.…”

Section: Introductionmentioning

confidence: 99%

Vanadium Redox Flow Battery State of Charge Estimation Using a Concentration Model and a Sliding Mode Observer

et al. 2021

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Vanadium redox flow batteries are very promising technologies for large-scale, inter-seasonal energy storage. Tuning models from experimental data and estimating the state of charge is an important challenge for this type of devices. This work proposes a non-linear lumped parameter concentration model to describe the state of charge that differentiates the species concentrations in the different system components and allows to compute the effect of the most relevant over-potentials. Additionally, a scheme, based on the particle swarm global optimization methodology, to tune the model taking into account real experiments is proposed and validated. Finally, a novel state of charge estimation algorithm is proposed and validated. This algorithm uses a simplified version of previous models and a sliding mode control feedback law. All developments are analytically formulated and formally validated. Additionally, they have been experimentally validated in a home-made single vanadium redox flow battery cell. Proposed methods offer a constructive methodology to improve previous results in this field.

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“…Furthermore, there are studies that propose equivalent models that are based on electric circuits, composed by resistors and capacitors that allow for describing the capacity of the battery, which is transduced in the energy stored on it. This last approach is presented in [19,20].…”

Section: Introductionmentioning

confidence: 99%

Voltage H∞ Control of a Vanadium Redox Flow Battery

2020

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Redox flow batteries are one of the most relevant emerging large-scale energy storage technologies. Developing control methods for them is an open research topic; optimizing their operation is the main objective to be achieved. In this paper, a strategy that is based on regulating the output voltage is proposed. The proposed architecture reduces the number of required sensors. A rigorous design methodology that is based on linear H∞ synthesis is introduced. Finally, some simulations are presented in order to analyse the performance of the proposed control system. The results show that the obtained controller guaranties robust stability and performance, thus allowing the battery to operate over a wide range of operating conditions. Attending to the design specifications, the controlled voltage follows the reference with great accuracy and it quickly rejects the effect of sudden current changes.

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Equivalent Circuit Model Considering Self-discharge for SOC Estimation of Vanadium Redox Flow Battery

Cited by 18 publications

References 7 publications

Redox Flow Batteries: A Literature Review Oriented to Automatic Control

Redox Flow Batteries: A Literature Review Oriented to Automatic Control

Vanadium Redox Flow Battery State of Charge Estimation Using a Concentration Model and a Sliding Mode Observer

Voltage H∞ Control of a Vanadium Redox Flow Battery

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