Bubble circulating device of flow battery

Abstract

The utility model creatively provides a bubble circulating device of a flow battery, which comprises an inflow pipe and an outflow pipe, the bubble circulating device is arranged between the inflow pipe and the outflow pipe, the bubble circulating device comprises an upper circulating pipe, a lower circulating pipe and a gas-liquid separation module, the upper circulating pipe is communicated with the outflow pipe, and the lower circulating pipe is communicated with the gas-liquid separation module. The lower circulating pipe is communicated with the inflow pipe, the lower circulating pipe is inserted into the upper circulating pipe, the lower circulating pipe and the upper circulating pipe are communicated, and the gas-liquid separation module is arranged in the lower circulating pipe; in the using process, the electrolyte enters the galvanic pile after bubbles are eliminated through the bubble separation module, the bubbles are prevented from entering the galvanic pile to generate bypass current, and meanwhile, the bubbles enter the output pipe through the gas-liquid separation module to be collected.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, and more specifically to a bubble circulation device of a liquid flow battery. Background Art

[0002] The flow battery stack is assembled from many single-chip batteries, and the flow battery system often requires a combination of multiple stacks to achieve the required power, and the electrolyte needs to be distributed through a common flow channel. The potential difference inside the stack will cause the directional movement of electrolyte ions in the common flow channel, thereby generating a bypass current. The presence of bypass current will increase the charge loss during the charging and discharging process, reduce the efficiency of the battery, and produce some side reactions. Therefore, it is particularly important to solve the loss caused by the bypass current; Patent CN213340450U discloses a liquid flow battery bubble breaker, and a gas-liquid separator is connected to the gas-liquid separator interface. Before the electrolyte enters the stack, the bubbles are removed to prevent the bubbles from entering the stack and affecting the performance of the stack. The bubbles in this solution cannot be recycled, and bubbles need to be continuously generated and eliminated. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a bubble circulation device for a liquid flow battery, so as to overcome the above-mentioned defects in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A bubble circulation device for a liquid flow battery comprises an inflow pipe and an outflow pipe, wherein the bubble circulation device is arranged between the inflow pipe and the outflow pipe, and the bubble circulation device comprises an upper circulation pipe, a lower circulation pipe and a gas-liquid separation module, wherein the upper circulation pipe is communicated with the outflow pipe, the lower circulation pipe is communicated with the inflow pipe, the lower circulation pipe is inserted into the upper circulation pipe, and the two are communicated, and the gas-liquid separation module is arranged in the lower circulation pipe.

[0006] Preferably, the gas-liquid separation module includes a regulating valve, a bubble collection hood and a bubble generation hood, and the regulating valve is controlled to open or close the lower circulation pipe. The bubble collection hood is arranged at one end of the lower circulation pipe close to the inlet pipe, the bubble generation hood is arranged at one end of the lower circulation pipe close to the upper circulation pipe, and the bubble generation hood is arranged in the upper circulation pipe.

[0007] Preferably, the regulating valve is provided with an air nozzle, the bubble generating cover covers the air nozzle, and one end of the bubble generating cover is hinged to the regulating valve.

[0008] Preferably, one end of the bubble collecting hood is arranged on the inlet pipe, and the inner diameter of the bubble collecting hood gradually decreases from the inlet pipe to the upper circulation pipe.

[0009] Preferably, an air cavity is provided between the regulating valve and the bubble collecting cover.

[0010] The beneficial effects of the utility model are as follows: during use, the electrolyte passes through the bubble separation module to eliminate bubbles and then enters the battery stack, thereby preventing bubbles from entering the battery stack and generating bypass current. At the same time, the bubbles pass through the gas-liquid separation module and enter the output pipe to collect the bubbles. The bubble separation and collection cover is used to collect the bubbles while preventing them from entering the battery stack and affecting the normal reaction of the battery stack. At the same time, the bubble generation cover is used to gather small bubbles into large bubbles and enter the outflow pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the overall structure diagram of the utility model;

[0012] Figure 2 It is the internal structure diagram of the utility model.

[0013] Figure numerals: 1. inflow pipe; 2. outflow pipe; 3. fuel cell stack; 4. liquid storage tank; 5. bubble circulation device; 51. upper circulation pipe; 52. lower circulation pipe; 53. gas-liquid separation module; 531. regulating valve; 532. bubble collection cover; 533. bubble generation cover; 534. air cavity. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0018] like Figure 1-Figure 2 As shown, the utility model provides a bubble circulation device 5 of a liquid flow battery, including an inflow pipe 1 and an outflow pipe 2, wherein the bubble circulation device 5 is arranged between the inflow pipe 1 and the outflow pipe 2, and the bubble circulation device 5 includes an upper circulation pipe 51, a lower circulation pipe 52 and a gas-liquid separation module 53, wherein the upper circulation pipe 51 is communicated with the outflow pipe 2, the lower circulation pipe 52 is communicated with the inflow pipe 1, and the lower circulation pipe 52 is inserted in the upper circulation pipe 51, and the two are communicated, and the gas-liquid separation module 53 is arranged in the lower circulation pipe 52; during the use of the liquid flow battery, bubbles are used to isolate the electrolyte to ensure that there is always air in the liquid storage tank 4 to keep the system balanced, but during operation, it is necessary to prevent bubbles from entering the battery stack 3 to generate bypass current and affect the system efficiency; A bubble circulation device 5 is provided on the liquid flow battery, and the bubble circulation device 5 includes an inflow pipe 1 and an outflow pipe 2. Both the inflow pipe 1 and the outflow pipe 2 are connected to the battery stack 3, and the electrolyte flows in through the inflow pipe 1 and flows out through the outflow pipe 2; a bubble circulation device 5 is provided between the inflow pipe 1 and the outflow pipe 2, and the bubble circulation device 5 includes an upper circulation pipe 51, a lower circulation pipe 52 and a gas-liquid separation module 53. The upper circulation pipe 51 is connected to the outflow pipe 2, and the lower circulation pipe 52 is connected to the inflow pipe 1. During use, the electrolyte enters the battery stack 3 after the bubbles are eliminated by the bubble separation module, so as to prevent the bubbles from entering the battery stack 3 and generating a bypass current. At the same time, the bubbles enter the output pipe through the gas-liquid separation module 53, and the bubbles are collected.

[0019] The gas-liquid separation module 53 includes a regulating valve 531, a bubble collecting hood 532 and a bubble generating hood 533. The regulating valve 531 is controlled to open or close the lower circulation pipe 52. The bubble collecting hood 532 is arranged at one end of the lower circulation pipe 52 close to the inflow pipe 1, and the bubble generating hood 533 is arranged at one end of the lower circulation pipe 52 close to the upper circulation pipe 51, and the bubble generating hood 533 is arranged in the upper circulation pipe 51; the gas-liquid separation module 53 includes a regulating valve 531, a bubble collecting hood 532 and a bubble generating hood 533. The lower circulation pipe 52 is opened and closed by controlling the regulating valve 531. During the flow of the electrolyte, the bubble collecting hood 532 is used to collect bubbles. The regulating valve 531 is used to adjust the gas flow rate from the lower circulation pipe 52 to the upper circulation pipe 51. At the same time, the bubble generating hood 533 is used to collect bubbles. When the bubbles in the bubble generating hood reach a certain level, the bubble generating hood 533 is opened, and the bubbles enter the output pipe through the upper circulation pipe 51.

[0020] The regulating valve 531 is provided with a gas nozzle, and the bubble generating cover 533 covers the gas nozzle, and one end of the bubble generating cover 533 is hinged on the regulating valve 531. The regulating valve 531 is provided with a gas nozzle, and the gas nozzle adopts a small hole structure, and the gas can pass through the gas nozzle from bottom to top, but the electrolyte will not flow in from top to bottom. The air hole is used to prevent the electrolyte in the output pipe from flowing into the lower circulation pipe 52 through the upper circulation pipe 51; one end of the bubble generating cover 533 is hinged on the regulating valve 531. During use, the bubble generating cover 533 covers the regulating valve 531, and the bubble generating cover 533 covers the regulating valve 531 under the action of gravity. When the gas in the bubble generating cover 533 reaches a certain amount, the bubble generating cover 533 hinged on the regulating valve 531 is used, and the bubble generating cover 533 is opened under the action of gas buoyancy to realize the generation and discharge of large bubbles. In the circulation process, the bubble generation speed and the size of the bubbles can be adjusted by adjusting the opening degree of the valve 531 and the mass of the bubble collecting cover 532.

[0021] One end of the bubble collecting hood 532 is arranged on the inlet pipe 1, and the inner diameter of the bubble collecting hood 532 gradually decreases from the inlet pipe 1 to the upper circulation pipe 51. The bubble collecting hood 532 is arranged on the inlet pipe 1 to collect bubbles from the electrolyte flowing into the battery stack 3, and the inner diameter of the bubble collecting hood 532 gradually decreases from the inlet pipe 1 to the upper circulation pipe 51. The bubbles move upward along the bubble collecting hood 532 to achieve separation of the bubbles and the electrolyte.

[0022] An air cavity 534 is provided between the regulating valve 531 and the bubble collecting cover 532. Air is stored in the air cavity 534. The air cavity 534 is utilized to avoid contact between the electrolyte in the input pipe and the output pipe, and at the same time, to avoid the electrolyte in the input pipe from directly entering the output pipe through the lower circulation pipe 52 and the upper circulation pipe 51.

[0023] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A bubble circulation device for a liquid flow battery, comprising an inflow pipe (1) and an outflow pipe (2), characterized in that: A bubble circulation device (5) is arranged between the inflow pipe (1) and the outflow pipe (2), and the bubble circulation device (5) comprises an upper circulation pipe (51), a lower circulation pipe (52) and a gas-liquid separation module (53); the upper circulation pipe (51) is in communication with the outflow pipe (2), the lower circulation pipe (52) is in communication with the inflow pipe (1), and the lower circulation pipe (52) is inserted into the upper circulation pipe (51), and the two are in communication; the gas-liquid separation module (53) is arranged in the lower circulation pipe (52).

2. The bubble circulation device of a liquid flow battery according to claim 1, characterized in that: The gas-liquid separation module (53) comprises a regulating valve (531), a bubble collecting hood (532) and a bubble generating hood (533); the regulating valve (531) is controlled to open or close the lower circulation pipe (52); the bubble collecting hood (532) is arranged at one end of the lower circulation pipe (52) close to the inflow pipe (1); the bubble generating hood (533) is arranged at one end of the lower circulation pipe (52) close to the upper circulation pipe (51); and the bubble generating hood (533) is arranged in the upper circulation pipe (51).

3. The bubble circulation device of a liquid flow battery according to claim 2, characterized in that: The regulating valve (531) is provided with an air nozzle, the bubble generating cover (533) covers the air nozzle, and one end of the bubble generating cover (533) is hinged to the regulating valve (531).

4. The bubble circulation device of a liquid flow battery according to claim 2, characterized in that: One end of the bubble collecting hood (532) is arranged on the inlet pipe (1), and the inner diameter of the bubble collecting hood (532) gradually decreases from the inlet pipe (1) to the upper circulation pipe (51).

5. The bubble circulation device of a liquid flow battery according to claim 2, characterized in that: An air cavity (534) is provided between the regulating valve (531) and the bubble collecting cover (532).

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