A device for detecting internal leakage in a vanadium redox flow battery stack

Abstract

The utility model discloses a kind of all-vanadium redox battery stack internal leakage detection devices, including nitrogen gas supply module that nitrogen gas is imported to the positive pole cavity and negative pole cavity of stack, liquid supply module that deionized water is transported to stack positive pole cavity, gas supply module that dry HCl gas is transported to stack negative pole cavity, monitoring module that detects the pressure change in negative pole cavity, safety processing module that gas is discharged in negative pole cavity is handled;The utility model simple structure, convenient operation can be adapted to different specifications all-vanadium redox battery stack, simultaneously meet production batch quality inspection and on-site operation and maintenance diagnosis demand;By transporting deionized water to stack positive pole cavity, dry HCl gas is transported to stack negative pole cavity, so that stack positive pole cavity and negative pole cavity form gas-liquid pressure difference, then based on gas-liquid pressure difference design and HCl gas dissolution amplification effect, the trace water volume change generated by tiny leakage is converted into the significant pressure drop of negative pole cavity, realize 0.1mL / min level tiny internal leakage accurate, fast detection.

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