全钒液流电池系统温度应力的响应特性研究

Study on response characteristics of temperature stresses in all vanadium redox flow battery system

掌握全钒液流电池在运行工况温度应力作用下的特性响应能力,对提高全钒液流电池储能系统的性能、可靠性和经济性有着重要的作用。开展了温度应力对全钒液流电池容量、效率和内阻等特性影响的实验研究,分析了全钒液流电池性能随温度应力变化的规律。实验结果表明,在0~30℃,全钒液流电池系统的容量和效率随温度的降低显著降低,内阻随温度的上升而呈现二次函数的下降规律。在20~30℃,与功率需求相应的容量响应能力逐渐降低,但能提供50%可用容量,在0~10℃,功率需求增加对系统的库仑效率影响显著。研究结果为优化全钒液流电池的设计方案和运行管理策略提供了实验依据。

It is very important for improving the performance,reliability and economy to master the characteristic response ability of all vanadium liquid flow battery under temperature stresses.In this paper,an experimental study on the effects of temperature stresses on capacity,efficiency and internal resistance is carried out for the all-vanadium flow battery system.The variation of the performance of all vanadium redox flow battery system with ambient temperature stresses is analyzed.The experimental analysis shows that the capacity and efficiency of the all-vanadium redox flow battery system decrease with the decrease of temperature in the range of 0~30℃,and the internal resistance increases with the decrease of temperature.In the range of 20~30℃,corresponding to the power demand,the energy response capability is gradually reduced,but it can provide 50%of the available energy demand.In the range of 0~10℃,the power increase has a significant influence on the coulombic efficiency of the system.The results provide the experimental basis for optimizing the design and operation management strategy of all vanadium liquid flow battery.