Method for sealing liquid reservoir for liquid flow battery

Abstract

The invention relates to a method for sealing a liquid reservoir for a liquid flow battery, which comprises the following steps of: installing a seal cover on the liquid reservoir, filling the liquid reservoir with electrolyte, and sealing the liquid reservoir; indirectly sealing the sealed liquid reservoir with liquid or gas. The pressure in the liquid reservoir indirectly sealed by the liquid or gas always stays at one standard atmospheric pressure. The liquid or gas used for indirect sealing is sealing liquid or sealing gas. The sealing liquid or sealing gas and the liquid reservoir are connected through a conduit. One end of the conduit is outside the liquid reservoir. The invention has the advantages that the sealing method is simple, convenient and efficient; the problem of inconsistent charging states of battery anode and cathode caused by oxidation of low-valence ions and the problems of ion permeation, water permeation, membrane aging and the like caused by the problem of pressure unbalance are solved; the service life of the membrane can be effectively prolonged; and the coulomb efficiency of the liquid flow battery is improved and the service life of the liquid flow battery can be effectively prolonged.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to a sealing method for a liquid storage tank of the flow battery. Background technique [0002] As an energy storage system with excellent performance, flow batteries have broad application prospects in photovoltaic / wind energy systems, power grid peak shaving systems, industrial batteries, and emergency uninterrupted power supply equipment. Its advantages mainly include the following aspects: the output power and energy storage capacity are independent of each other, the output power depends on the performance of the stack, and the capacity depends on the concentration and volume of the electrolyte. Therefore, in use, when the output power is constant, the capacity The size can be realized only by adjusting the concentration and volume of the electrolyte; the chemical reaction during charging and discharging is simple and rapid, there is no solid phase change, the reaction is only ca...

AI Technical Summary

Problems solved by technology

During the research, the applicant found that the above-mentioned patent literature proposes that the design concept of "solving the pressure imbalance between the positive and negative electrodes by connecting the positive and negative electrode liquid storage tanks" is not suitable for the system of oxidizing electrolyte ions with oxygen energy.

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