Insulation sealing drainage structure for AEM hydrogen production electrolytic cell

Abstract

The utility model relates to an insulating and sealing drainage structure for an AEM hydrogen production electrolytic cell, which is characterized in that the insulating and sealing drainage structure comprises a plate body, and a rectangular hole matched with a gas-liquid two-phase diffusion layer in size is formed in the middle of the plate body; a liquid inlet square hole and a gas and liquid outlet square hole are respectively formed in the plate body on the outer sides of the two ends of the rectangular hole; according to the utility model, the diversion trench structure is arranged on the insulated sealing drainage structure, so that the diversion trench can be prevented from being processed on the polar plate, and the processing efficiency of the polar plate is improved; a converging area is arranged on the diversion trench, and the rectangular hole is communicated with the liquid inlet square hole and the gas-liquid outlet square hole by adopting diversion trench units which are arranged in parallel; the parallel diversion trench units can more effectively ensure the rigid stability of the connecting part, and the phenomenon of damage is not easy to occur; the collecting groove is connected with the flow guide groove unit, so that the gas-liquid flow guide efficiency can be effectively improved, and meanwhile, the gas-liquid mixed flow phenomenon can be effectively avoided by increasing the groove depth of the collecting groove.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy technology, and in particular to an insulating and sealed flow-guiding structure for an AEM hydrogen electrolyzer. Background Technology

[0002] An electrolytic hydrogen production unit is a device that decomposes water into oxygen and hydrogen at the anode and cathode of an electrolytic cell. After electrolysis, the gases need to be separated for use. In actual production, a common method is to install a flow-guiding structure plate in the electrolytic hydrogen production unit, and to achieve the separation and utilization of water, hydrogen, and oxygen by opening flow-guiding channels in the structure.

[0003] Common insulating and sealing current-draining structures employ a surface-mounted ridge design. This structure mates with grooves on the electrode plate, requiring the design of specialized grooves during electrode plate production to accommodate the current-draining structure. Furthermore, these grooves require additional machining, increasing the production process. In addition, the use of divergent flow-guiding groove units in insulating and sealing current-draining structures results in inconsistent flow path lengths, which can easily disrupt the original structure, leading to weak rigidity, susceptibility to damage, and poor sealing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an insulating and sealed flow guiding structure for an AEM hydrogen production electrolyzer, which can solve the problems of inconsistent lengths of the flow guiding unit, unbalanced overall rigidity, and easy mixing of gas and liquid in the traditional hydrogen production electrolyzer with a divergent structure.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an insulating and sealed flow-guiding structure for an AEM hydrogen production electrolyzer, wherein the AEM hydrogen production electrolyzer includes several single-chamber electrolyzers, and each single-chamber electrolyzer includes a membrane electrode and electrode plates disposed on both sides of the membrane electrode; a gas-liquid two-phase diffusion layer is also provided in the middle between the membrane electrode and the electrode plates, and the membrane electrode and the electrode plates are connected by an insulating and sealed flow-guiding structure. Its innovation lies in:

[0006] The insulating and sealing drainage structure includes a plate, and a rectangular hole of a size adapted to the gas-liquid two-phase diffusion layer is provided in the middle of the plate. A liquid inlet square hole and a gas-liquid outlet square hole are respectively provided on the outer sides of the rectangular hole on the plate.

[0007] The rectangular hole and the liquid inlet square hole form a first connecting part, and the rectangular hole and the gas outlet square hole form a second connecting part. The first connecting part and the second connecting part are symmetrically arranged about the center line of the rectangular hole.

[0008] Both the first connecting part and the second connecting part are provided with guide grooves, and the guide grooves are used to connect the rectangular hole and the liquid inlet square hole and to connect the rectangular hole and the gas outlet liquid square hole.

[0009] The guide channel includes a guide channel unit and a collection channel; the collection channel is disposed at one end of the guide channel unit, and the collection channel is used to connect one end of the rectangular hole with the liquid inlet hole, and to connect the other end of the rectangular hole with the gas-liquid outlet hole; there are several guide channel units, which are arranged in parallel to each other.

[0010] The depth of the collecting trough is greater than the depth of the guiding trough unit, and the overall width of the collecting trough does not exceed 1 / 2 of the length of the guiding trough unit.

[0011] Furthermore, the collecting trough is in the shape of an isosceles trapezoid.

[0012] Furthermore, the thickness of the plate is 15-20mm; the depth of the collecting groove does not exceed 2 / 3 of the plate thickness, and the depth of the guiding groove unit does not exceed 1 / 2 of the plate thickness.

[0013] The advantages of this utility model are:

[0014] 1) In this utility model, the structure of setting a guide groove on the insulating and sealing flow guiding structure can avoid processing the guide groove on the electrode plate and improve the processing efficiency of the electrode plate. In addition, a collection area is set on the guide groove, and parallel guide groove units are used to connect the rectangular hole, the liquid inlet square hole, and the gas-liquid outlet square hole. The parallel guide groove units can more effectively ensure the rigidity and stability of the connection part and are not prone to damage. In addition, the use of a collection groove to connect with the guide groove unit can effectively improve the efficiency of gas-liquid flow, and the increased depth of the collection groove can effectively avoid gas-liquid mixing. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of an insulating and sealed flow-guiding structure for an AEM hydrogen production electrolyzer according to this utility model.

[0017] Figure 2 This is a cross-sectional view of an insulating and sealed flow-guiding structure for an AEM hydrogen production electrolyzer according to this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figure 1 Figure 2 The diagram shows an insulating and sealed flow-guiding structure for an AEM hydrogen production electrolyzer. The AEM hydrogen production electrolyzer includes several single-chamber electrolyzers, and each single-chamber electrolyzer includes a membrane electrode and electrode plates located on both sides of the membrane electrode. A gas-liquid two-phase diffusion layer is also provided in the middle between the membrane electrode and the electrode plates. The membrane electrode and the electrode plates are connected by the insulating and sealed flow-guiding structure.

[0021] The insulating and sealing drainage structure includes a plate body 1, and a rectangular hole 11 with a size adapted to the gas-liquid two-phase diffusion layer is provided in the middle of the plate body 1. A liquid inlet square hole 12 and a gas-liquid outlet square hole 13 are respectively provided on the outer sides of the two ends of the rectangular hole 11 on the plate body.

[0022] The rectangular hole 11 and the liquid inlet square hole 12 form a first connecting part 14, and the rectangular hole 11 and the gas outlet liquid square hole 13 form a second connecting part 15. The first connecting part 14 and the second connecting part 15 are symmetrically arranged about the center line of the rectangular hole.

[0023] Both the first connecting part 14 and the second connecting part 15 are provided with guide grooves, and the guide grooves are used to connect the rectangular hole and the liquid inlet square hole 12 and to connect the rectangular hole 11 and the gas outlet liquid square hole 13.

[0024] The guide channel includes a guide channel unit 2 and a collection channel 3; the collection channel 3 is disposed at one end of the guide channel unit 2, and the collection channel 3 is used to connect one end of the rectangular hole 11 with the liquid inlet square hole 12, and to connect the other end of the rectangular hole 11 with the gas outlet square hole 13; there are several guide channel units 2, which are arranged in parallel to each other.

[0025] The depth of the collecting trough 3 is greater than the depth of the guiding trough unit 2, and the overall width of the collecting trough 3 does not exceed 1 / 2 of the length of the guiding trough unit 2.

[0026] The collecting trough 3 is in the shape of an isosceles trapezoid.

[0027] The thickness of plate 1 is 15-20mm; the depth of the collecting groove 3 does not exceed 2 / 3 of the plate thickness, and the depth of the guiding groove unit 2 does not exceed 1 / 2 of the plate thickness.

[0028] The working principle of this utility model is as follows: First, a guide groove structure is set on the insulating and sealed flow guiding structure, which can avoid processing the guide groove on the electrode plate and improve the processing efficiency of the electrode plate; In addition, a collection area is set on the guide groove, and parallel guide groove units are used to connect the rectangular hole, the liquid inlet square hole, and the gas-liquid outlet square hole; the parallel guide groove units can more effectively ensure the rigidity and stability of the connection part and are not prone to damage; In addition, the use of a collection groove to connect with the guide groove unit can effectively improve the efficiency of gas-liquid flow, and the increased depth of the collection groove can effectively avoid gas-liquid mixing.

[0029] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. An insulating and sealed flow-guiding structure for an AEM hydrogen production electrolyzer, wherein the AEM hydrogen production electrolyzer includes several single-chamber electrolyzers, and each single-chamber electrolyzer includes a membrane electrode and electrode plates disposed on both sides of the membrane electrode; a gas-liquid two-phase diffusion layer is further provided in the middle between the membrane electrode and the electrode plates, and the membrane electrode and the electrode plates are connected by an insulating and sealed flow-guiding structure, characterized in that: The insulating and sealing drainage structure includes a plate, and a rectangular hole of a size adapted to the gas-liquid two-phase diffusion layer is provided in the middle of the plate. A liquid inlet square hole and a gas-liquid outlet square hole are respectively provided on the outer sides of the rectangular hole on the plate. The rectangular hole and the liquid inlet square hole form a first connecting part, and the rectangular hole and the gas outlet square hole form a second connecting part. The first connecting part and the second connecting part are symmetrically arranged about the center line of the rectangular hole. Both the first connecting part and the second connecting part are provided with guide grooves, and the guide grooves are used to connect the rectangular hole and the liquid inlet square hole and to connect the rectangular hole and the gas outlet liquid square hole. The guide channel includes a guide channel unit and a collection channel; the collection channel is disposed at one end of the guide channel unit, and the collection channel is used to connect one end of the rectangular hole with the liquid inlet hole, and to connect the other end of the rectangular hole with the gas-liquid outlet hole; there are several guide channel units, which are arranged in parallel to each other. The depth of the collecting trough is greater than the depth of the guiding trough unit, and the overall width of the collecting trough does not exceed 1 / 2 of the length of the guiding trough unit.

2. The insulating and sealed current-draining structure for an AEM hydrogen production electrolyzer according to claim 1, characterized in that: The collecting trough is in the shape of an isosceles trapezoid.

3. The insulating and sealed current-guiding structure for an AEM hydrogen electrolyzer according to claim 1, characterized in that: The thickness of the plate is 15-20mm; the depth of the collecting groove does not exceed 2 / 3 of the plate thickness, and the depth of the guiding groove unit does not exceed 1 / 2 of the plate thickness.

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