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。
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.
作者
李昂
李晓蒙
杨林
王含
项俊帆
刘雨涵
LI Ang;LI Xiaomeng;YANG Lin;WANG Han;XIANG Junfan;LIU Yuhan(State Power Investment Corporation Research Ilnstitute,Beijing 102209,China)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2022年第2期609-614,共6页
Energy Storage Science and Technology
关键词
储能
液流电池
压力
密封
数值仿真
energy storage
redox flow batteries
compression force
seal
numerical simulation
