全钒液流电池电堆的均一性.pdf

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2017年第36卷第2期
CHEMIICAL INDUSTRY AND ENGIINEERING PROGRRESS
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全钆液流电池电堆的均一性
刘纳,李爱魁
(国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074)
摘要:全钡液流电池电堆的均一性直接影响到其寿命。本文从流道结构、运行参数等方面,系统探讨了影响全
钒液流电池电堆均一性的各种因素。通过优化管路结构和液流框结构,提高了电堆的均一性,随支管管径不断
减小,当主管与支管管径由4:3减小到4:1时,电堆进液流量标准偏差由0.039ms降到0.001m/s,电堆进液
流速均一性得到改善;通过优化液流框结枸,使电堆单体电池电解液流量标准偏差由0.142m/s降到(0.032m/s,
改吾了电堆单体电池均一性。电解液流量、充放电电流密度等运行参数影响全钒液流电池电堆均一性,对其进
行了实验与分析,结果表明:电堆电压标准偏美随充放电电流増大而线性増大,其斜辛与載距均与电解液性质、
电极材料性质及表面结构等因素有关;电堆电压标准偏姜随电解液流速的増大而减小,且在超过一定流量后不
再变化,为全钒液流电池材料选型优化、结构优化及运行提供技术支撑。
关键词:巳池;全钡液流电池储能系统;均一性;多孔介质;扩散;优化设计
中图分类号:TM911文献标志码:A文章编号:1000-6613(2017)02-0519-06
DOI:10.16085/jiS.1000-6613.2017.02.017
Research on uniformity of vanadium redox-flow battery
LU Na. L/Aikui
( Wuhan NARI Limited Company of State Grid Electric Power Research Institute, Wuhan 430074, Hubei, China
Abstract: The uniformity of the vanadium redox flow battery (VRB directly affect its life span. The
flow channel structure and the operating parameters of the battery had been measured and analyzed. By
optimizing the pipeline structure and flow frame structure, the uniformity of the stack was improved
When the ratio of executive diameter to branch pipe diameter was reduced from 4:3 to 4. 1, the
standard deviation of the liquid flow velocity was reduced from the 0.039m/s to 0.001m/s. The standard
deviation of the stack liquid flow had been decreased from the 0.142m/s to 0.032m/s by optimizing the
flow frame structure. The standard deviation of VRB increased linearly with the increase of the current
The slope and intercept of the linear equation related to the properties of electrolyte, electrode materia
and surface structure. The standard deviation of VRB decreased with the increase of the fow rate. but
stayed the same after a certain flow was reached. The experimental results can provide technical
support for the material selection and the operation of VRB
Key words battery: all vanadium redox flow battery system(VRB); uniformity; porous media
diffusion; optimal design
大容量储能技术可以有效缓解用电供需矛盾,
目前,针对全钒液流电池储能系统集成设计
平抑大规模清沾能源发电接入电网带米的波动性,能效优化设计、系统监控管理、平抑风电波动仿真
提高电网运行的安全性、经济性、灵活性,积极促模拟、材料选型优化、充放电模拟、电解液流场分
进可再生能源的利用和发展?。而全钒液流电池具
有选址灵活、环境适应性强、便于安装、运行安全、收稿日期:20160815:修改稿日期:2060621
司科技
寿命长等优点,共相关技术取得显著进展,产W业イ化第一作者及联系人:刘(195)、"女.士,研究方向为电化学
应用条件日趋成熟6
储能。E-mail:L.iuna8Q163.com
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