全钒液流电池在充电结束搁置阶段的开路电压变化

doi:10.19799/j.cnki.2095-4239.2021.0717

储能科学与技术 ›› 2022, Vol. 11 ›› Issue (7): 2046-2050.doi: 10.19799/j.cnki.2095-4239.2021.0717

全钒液流电池在充电结束搁置阶段的开路电压变化

鲁志颖¹(), 江杉¹, 李全龙¹, 马可心², 傅腾³, 郑志刚³, 刘志成⁴, 李淼⁴, 梁永胜⁴, 董知非⁴

^1.大连融科储能技术发展有限公司，辽宁大连 116025
^2.国家电投东北电力有限公司
^3.中电投东北能源科技有限公司
^4.中电投东北新能源发展有限公司，辽宁沈阳 110000

收稿日期:2021-12-30 修回日期:2022-01-20 出版日期:2022-07-05 发布日期:2022-06-29
通讯作者: 鲁志颖 E-mail:zhiying.lu@rongkepower.com
作者简介:鲁志颖（1993—），男，硕士，主要研究方向为液流电池储能，E-mail：zhiying.lu@rongkepower.com。
基金资助:
大连市高层次人才创新支持计划—青年科技之星(2019RQ006)

Open-circuit voltage variation during charge and shelf phases of an all-vanadium liquid flow battery

Zhiying LU¹(), Shan JIANG¹, Quanlong LI¹, Kexin MA², Teng FU³, Zhigang ZHENG³, Zhicheng LIU⁴, Miao LI⁴, Yongsheng LIANG⁴, Zhifei DONG⁴

^1.Dalian Rongke Power Co. , Ltd. , Dalian 116025, Liaoning, China
^2.SPIC Northeast Electric Power Co. , Ltd.
^3.China Power Investment Corporation Northeast Energy Technology Co. , Ltd.
^4.China Power Investment Northeast New Energy Development Co. , Ltd. , Shenyang 110000, Liaoning, China

Received:2021-12-30 Revised:2022-01-20 Online:2022-07-05 Published:2022-06-29
Contact: Zhiying LU E-mail:zhiying.lu@rongkepower.com

摘要/Abstract

摘要：

本工作通过对全钒液流电池的充电-搁置实验，对电池搁置阶段的开路电压变化进行探索。实验发现，全钒液流电池的开路电压变化与非液流储能电池有所不同，主要由跃降、缓慢下降、缓慢上升和趋于稳定四个过程组成。本工作首先对全钒液流电池开路电压的四个过程逐步进行分析，然后重点针对开路电压出现缓慢上升的原因及影响因素进行探索。实验结果表明全钒液流电池开路电压缓慢上升的过程与电池内电解液体积占比和流量有关，是全钒液流电池在充电结束搁置阶段的重要特征。电池内电解液体积占比越小，开路电压缓慢上升过程越长，上升幅度越小。电解液流量越大，开路电压缓慢上升过程越短，上升幅度越小。

关键词: 全钒液流电池, 开路电压, 非液流储能电池

Abstract:

Charge and shelf tests on an all-vanadium liquid flow battery are used to investigate the open-circuit voltage change during the shelving phase. It is discovered that the open-circuit voltage variation of an all-vanadium liquid flow battery is different from that of a nonliquid flow energy storage battery, which primarily consists of four processes: jumping down, slowly falling, slowly rising, and stabilizing. The four stages of an all-vanadium liquid flow battery's open-circuit voltage are first evaluated step by step in this study, and then, the causes and influencing elements for the gradual growth of the open-circuit voltage are investigated. The experimental results demonstrated that the slow rise of the open-circuit voltage of the all-vanadium liquid flow battery is related to the volume share of the electrolyte in the battery and flow rate, which is an important feature of the all-vanadium liquid flow battery during the end of charge and shelf phases. The slower the open-circuit voltage rises, the less the volume proportion of electrolyte in the battery. The steady rising of the open-circuit voltage becomes shorter and smaller as the electrolyte flow rate increases.

Key words: all-vanadium liquid flow battery, open-circuit voltage, nonliquid flow energy storage battery

中图分类号:

TM 911

鲁志颖, 江杉, 李全龙, 马可心, 傅腾, 郑志刚, 刘志成, 李淼, 梁永胜, 董知非. 全钒液流电池在充电结束搁置阶段的开路电压变化[J]. 储能科学与技术, 2022, 11(7): 2046-2050.

Zhiying LU, Shan JIANG, Quanlong LI, Kexin MA, Teng FU, Zhigang ZHENG, Zhicheng LIU, Miao LI, Yongsheng LIANG, Zhifei DONG. Open-circuit voltage variation during charge and shelf phases of an all-vanadium liquid flow battery[J]. Energy Storage Science and Technology, 2022, 11(7): 2046-2050.

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Volume/mL	B点		C点		D点
Volume/mL	Time/s	Voltage/V	Time/s	Voltage/V	Time/s	Voltage/V
100	1	1.5102	53	1.4753	148	1.4806
175	1	1.5113	57	1.4769	213	1.4801
250	1	1.5125	67	1.4775	345	1.4803

Flow rate/mL	B点		C点		D点
Flow rate/mL	Time/s	Voltage/V	Time/s	Voltage/V	Time/s	Voltage/V
22	1	1.5102	53	1.4753	148	1.4806
35	1	1.5091	29	1.4842	100	1.4889

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全钒液流电池在充电结束搁置阶段的开路电压变化

Open-circuit voltage variation during charge and shelf phases of an all-vanadium liquid flow battery

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