储能科学与技术 ›› 2022, Vol. 11 ›› Issue (2): 609-614.doi: 10.19799/j.cnki.2095-4239.2021.0378

• 储能系统与工程 • 上一篇    下一篇

液流电池封装压力计算

李昂(), 李晓蒙, 杨林, 王含, 项俊帆, 刘雨涵   

  1. 国家电投集团科学技术研究院有限公司，北京 102209
  • 收稿日期:2021-07-26 修回日期:2021-08-13 出版日期:2022-02-05 发布日期:2022-02-08
  • 通讯作者: 李昂 E-mail:liang@spic.com.cn

Compression force calculation of redox flow battery

Ang LI(), Xiaomeng LI, Lin YANG, Han WANG, Junfan XIANG, Yuhan LIU   

  1. State Power Investment Corporation Research Institute, Beijing 102209, China
  • Received:2021-07-26 Revised:2021-08-13 Online:2022-02-05 Published:2022-02-08
  • Contact: Ang LI E-mail:liang@spic.com.cn

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摘要：

液流电池可用于大规模电力储存，辅助新能源电力并入电网，也可作为备用电源，进行小时级稳定的电力输送。其工程优势是系统的功率与储存容量自由匹配，是有效提高电能质量、保障电力输送稳定性的手段之一。本工作建立了一种基于胡克定律的力学模型，用于求解电池堆的密封压力。经数值仿真发现，电池堆刚度系数与单电池数量的增长呈对数减函数关系。装配中，堆体自重下压量与电池节数的增加呈现二次增函数。一个全尺寸的含有100节电池的电堆，理论计算结果与装配过程中记录的数据相符，电池堆通过了气密性检测，证明此数学模型有指导意义。

关键词: 储能, 液流电池, 压力, 密封, 数值仿真

Abstract:

The application scenario for redox flow battery (RFB) systems is large-scale energy storage, which aims at integrating renewable energy into national grids. RFBs are also used as a backup power source to provide energy on an hourly basis. The engineering advantages of this technical route are a flexible arrangement of system-rated power and storage capacity, as well as an effective method of improving electricity quality and transmission stability. Hook's Law was used to establish a force analysis model to determine the stack compression load. Since the application of this numerical simulation, a decrement logarithmic trendline of the model stiffness with an increased number of cells was discovered. During the battery assembly process, an increasing quadratic curve demonstrated self-weight-induced height decline. This mathematical approach was validated due to computational outputs of a full-scale stack consisting of 100 cells matched with recorded values in real assembly. Meanwhile, this battery stack passed tests evaluating its sealing properties.

Key words: energy storage, redox flow batteries, compression force, seal, numerical simulation

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