Study of 10 kW Vanadium Flow Battery Discharge Characteristics at Different Load Powers

IF 5.5 3区材料科学 Q2 CHEMISTRY, PHYSICAL ACS Applied Energy Materials Pub Date : 2024-05-24 DOI:10.3390/batteries10060175

Ilia Rashitov, Aleksandr Voropay, Grigoriy Tsepilov, Ivan Kuzmin, Alexey Loskutov, Evgeny Osetrov, A. Kurkin, I. Lipuzhin

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Abstract

Vanadium redox flow batteries are promising energy storage devices and are already ahead of lead–acid batteries in terms of installed capacity in energy systems due to their long service life and possibility of recycling. One of the crucial tasks today is the development of models for assessing battery performance and its residual resource based on the battery’s present state. A promising method for estimating battery capacity is based on analyzing present voltage and current values under various load conditions. This paper analyzes the discharge characteristics of a 10 kW all-vanadium redox flow battery at fixed load powers from 6 to 12 kW. A linear dependence of operating voltage and initial discharge voltage on load power is established. It is also determined that the slope of the discharge curve linear section does not increase linearly in absolute value, and the Box–Lucas model can be used to describe it. Models for predicting current VRFB capacity based on different curve fitting functions are proposed. These models can be used to roughly estimate battery capacity at different load powers.

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不同负载功率下 10 kW 钒液流电池放电特性研究

钒氧化还原液流电池是一种前景广阔的储能设备，由于其使用寿命长且可回收利用，其在能源系统中的装机容量已经超过了铅酸电池。目前的关键任务之一是根据电池的当前状态开发评估电池性能及其剩余资源的模型。估算电池容量的一种可行方法是分析各种负载条件下的当前电压和电流值。本文分析了 10 kW 全钒氧化还原液流电池在 6 至 12 kW 固定负载功率下的放电特性。确定了工作电压和初始放电电压与负载功率的线性关系。同时还确定了放电曲线线性部分的斜率在绝对值上并不是线性增加的，可以使用 Box-Lucas 模型对其进行描述。根据不同的曲线拟合函数，提出了预测当前 VRFB 容量的模型。这些模型可用于粗略估算不同负载功率下的电池容量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.