Research on Self-discharge Characteristics of a Vanadium Redox-flow Battery System

Abstract

On the basis of the actual request of renewable energy power generation to energy storage battery, this paper has carried out self-discharge characteristic researches of the vanadium redox-flow battery System (VRFB) at hundreds of kilowatts level. With two testing methods and two management mode of VRFB, the experimental results demonstrate that, the characteristics of self-discharge of the VRFB associate with rated power of the system. Reaction areas of cell is main influencing factors of self-discharge characteristics. Self-defined self-discharge rate can carry out effectively evaluation of self-discharge characteristics of VRFB which possesses different power and capacity. Under hot standby, the auxiliary loss of VRFB is greater than that of self-discharge factors of VRFB stack.