全钒液流电池系统漏电功率影响因素研究

Factors affecting leakage power of all-vanadium redox flow battery system

基于Simulink仿真平台,建立了多电堆串联运行全钒液流电池系统漏电回路等效模型,分析了电堆内串联单电池数量、系统盘管等效电阻、系统串联电堆数量以及系统开路电压等因素对系统整体漏电功率的影响规律及变化情况。仿真结果表明,电堆内串联单电池数量越少、系统盘管等效电阻越大、系统串联电堆数量越少、系统开路电压越小,系统整体漏电功率越小,但漏电功率的变化速率随上述各种因素的变化各有差异。该研究为全钒液流电池的多电堆串联运行系统的优化设计及风险防范提供了参考依据。

The equivalent model of leakage circuit for multi-stack all-vanadium flow battery system was established based on Simulink.The factors were analyzed,such as the number of series cells in the stack,the equivalent resistance of the coiled pipe in the system,the number of series stacks in the system and the open circuit voltage(OCV).The simulation results show that the smaller the number of series cells in the stack,the larger the equivalent resistance of the coiled pipe in the system,the smaller the number of series stacks in the system,and the smaller the OCV of the system,the smaller the overall leakage power of the system.However,the changing rate of leakage power varies with the mentioned factors.It provides a reference for the design optimization and risk prevention of multi-stack all-vanadium flow battery system.