A device and method for quantitatively monitoring hydrogen evolution side reaction of a flow battery on line

Abstract

This invention discloses a quantitative online monitoring device and method for hydrogen evolution side reactions in flow batteries, relating to the field of flow battery technology. It solves the problem of complex and cumbersome processes for obtaining hydrogen volume during hydrogen evolution side reactions in existing technologies, making monitoring and evaluation inconvenient. Positive and negative electrolyte storage bottles are connected to the positive and negative electrodes of the battery stack via a circulation pipeline equipped with a circulation pump. The negative electrolyte storage bottle is connected to a graduated tube, the upper end of which is connected to an inert gas reservoir. A pressure transmitter and a temperature sensor are installed inside the negative electrolyte storage bottle. The battery stack is connected to a Hall current sensor and a voltage transmitter. A graduated tube liquid level detector is installed outside the graduated tube. The graduated tube liquid level detector, pressure sensor, and temperature sensor are electrically connected to a data acquisition card, which is connected to a computer. The quantitative online monitoring device and method for hydrogen evolution side reactions in flow batteries provided by this application allows for intuitive and real-time monitoring of hydrogen evolution volume, facilitating the monitoring and evaluation of hydrogen evolution side reactions in flow batteries.

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