Energy-saving vanadium cell capable of improving cell stability

Abstract

The invention discloses an energy-saving vanadium cell capable of improving cell stability. The energy-saving vanadium cell comprises a positive pole half cell, a negative pole half cell and a cell stack, wherein the positive pole half cell and the negative pole half cell are connected with the cell stack respectively; the positive pole half cell comprises a positive pole liquid storage tank, a first air outlet pipe, a first delivery pipe, a second delivery pipe, a positive pole pump, a third delivery pipe and a fourth delivery pipe; and the negative pole half cell comprises a negative pole liquid storage tank, a third air outlet pipe, a fifth delivery pipe, a sixth delivery pipe, a negative pole pump, a seventh delivery pipe and an eighth delivery pipe. Through the switching control of avalve, the delivery of an electrolyte under the effect of gravity can be realized, the delivery flow of the electrolyte can be improved by using gas thrust, the output of the pump is reduced, an energy-saving effect is reached, and the air outlet pipes enable gas to be in a safe state all the time inside the liquid storage tanks. Gas inside the liquid storage tanks is used for isolating the electrolyte and external gas, divalent vanadium ions inside the electrolyte are unlikely to oxidize, the stability of the electrolyte is facilitated, the performance of the vanadium cell is improved, and the charge and discharge efficiency of the vanadium cell is improved.

Description

technical field [0001] The invention relates to the field of vanadium battery electrolyte storage equipment, and further relates to a vanadium battery electrolyte storage tank which utilizes the self-gravity of gas and electrolyte as thrust and increases the output flow of the electrolyte, and finally realizes energy saving and stability of the vanadium battery . Background technique [0002] With the depletion of traditional energy and the corresponding environmental problems, the utilization of renewable energy such as wind energy and solar energy has attracted widespread attention and developed rapidly. At the same time, in order to ensure the stable power supply of renewable energy and overcome its inherent problems, more and more Many energy storage technologies have been developed and used, among which flow batteries are a solution for large-scale energy storage technologies. Due to the advantages of vanadium battery with long service life, high energy conversion rate...

AI Technical Summary

Problems solved by technology

[0007] In addition, the positive electrode pump in the vanadium battery is placed in an acidic environment for a long time, if it is operated for a long time, it is easy to affect the service life

[0008] During the use of the vanadium battery, because the gas in the liquid storage tank needs to be released to the outside world, it will be in contact with the outside world, and its divalent vanadium ions are easily oxidized in the air, resulting in the instability of the electrolyte and seriously affecting the vanadium electrolyte. performance, reducing the charge and discharge efficiency of vanadium batteries

[0009] During the delivery of the electrolyte, the vanadium battery only uses the positive electrode pump as the power generation device for delivery, and the gravity potential energy of the electrolyte of the vanadium battery is not utilized, resulting in a waste of energy

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