电位测量误差对液流电池SOC误差的影响  

Influence of potential measurement error on SOC error of redox flow battery

作　　者：张胜寒[1] 张秀丽[2] 

机构地区：[1]华北电力大学环境科学与工程学院,河北保定071003 [2]华北电力科学研究院有限责任公司,北京100045

出　　处：《电源技术》2016年第6期1239-1241,共3页Chinese Journal of Power Sources

基　　金：国家"863"计划(2011AA05A113)

摘　　要：通过理论分析和计算研究了电极电位法测量全钒液流电池正极电解液荷电状态(SOC)技术中,电极电位测量误差对电解液荷电状态测量误差的影响。理论分析结果表明,正极电解液荷电状态的绝对误差分别与电位测量误差、"SOC(1-SOC)"成正比,并在SOC=0.5时达到极大值。电解液荷电状态的相对测量误差与电位测量误差成正比,且与(1-SOC)成正比;在电解液荷电状态值较小时,电极电位测量误差会对电解液荷电状态的相对测量误差带来显著的影响;与大小相等的负误差相比,电极电位的正误差引起的电解液荷电状态误差更大。根据实际测量数据所进行的计算结果,与理论分析结果一致。The effect of the potential measurement error in electrode on the measurement error of state of charge（SOC） of the electrolyte of the all vanadium redox flow battery was investigated by theoretical analysis and error calculation.The results show that the absolute error of SOC is in proportion to the measurement error of electrode potential,and to the value of＂SOC（1-SOC）＂.The absolute error of SOC reaches its peak value at a SOC value of0.5.Moreover,the relative error of SOC is in proportion to the measurement error of electrode potential,and to the value of＂（1-SOC）＂.For the small value of SOC,the measurement error of electrode potential has significant effect on the relative measurement error of SOC.Furthermore,a positive error in the measured electrode potential results in a larger relative measurement error in SOC than a negative error with the same magnitude.

关 键 词：液流电池 荷电状态 测量误差 

分 类 号：TM91[电气工程—电力电子与电力传动]