Current cutouts used by flow battery and flow battery adopting same

Abstract

The invention discloses current cutouts used by a flow battery. Each current cutout comprises a shell, an electrolyte inlet pipe, an electrolyte outlet pipe and a current cutoff part, wherein the electrolyte inlet pipe provides a channel for electrolyte to flow into the shell; the electrolyte outlet pipe provides a channel for the electrolyte to flow out of the shell; the current cutoff part is used for intermittently outputting the electrolyte flowing into the shell in a rotary manner. The current cutouts used by the flow battery have the beneficial effects that the integral structure is concise; the current cutoff parts enable the liquid flow to intermittently flow in a rotary manner, so that the electrolyte in electrolyte pipelines is intermittently disconnected, thus being capable of eliminating the shunt leakage current. The invention also discloses the flow battery. By additionally arranging the current cutouts used by the flow battery on outlet pipelines of electric pumps, closed circuits can be disconnected to intermittently input the electrolyte to each electric pile section by section and the electrolyte in the electrolyte pipelines is intermittently disconnected, so that the shunt current caused because the flow battery shares the electrolyte can be prevented.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a current breaker for a flow battery and a flow battery using the current breaker. Background technique [0002] The principle of the all-vanadium redox flow battery is: use the flowing vanadium electrolyte aqueous solution as the energy storage medium, convert the electrical energy into chemical energy and store it in the vanadium ion pairs of different valence states, and convert the chemical energy into electrical energy output when needed. It has technical characteristics such as large capacity, long life, low cost, high efficiency, safety and reliability, and is expected to play an important role in the field of large-scale energy storage. [0003] Generally speaking, large-scale energy storage flow batteries often contain dozens of stacks. In order to provide electrolyte for each stack, the electrolyte is generally transported and distributed through public flow channels ...

AI Technical Summary

Problems solved by technology

The disadvantages of this structure are: it is difficult to process and install through the liquid storage tank; the weight is too large, and the liquid storage tank is easily deformed; the liquid must flow into the upper cavity, and it is required to be well aligned, otherwise it will directly fall into the liquid storage tank, which will not It will play the role of cut-off; at the same time, the whole cut-off device is placed in the liquid storage tank, which is not convenient for manual adjustment and maintenance

This kind of structural defect is: 1, because it has only one lever cut-off tank, when the electrolyte flows out from the lever cut-off tank, the electrolyte is actually in a continuous flow state, and the liquid will not be completely disconnected; 2, the lever The breaker tank is placed in the liquid storage tank, which is not convenient for manual adjustment and maintenance

[0010] None of the existing technologies can well solve the problem of increasing the branch resistance. Therefore, it is of great significance to invent a device that has a simple structure and can effectively increase the branch resistance so as to eliminate the leakage current of the bypass.

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