Water permeability testing device for membrane electrode and proton exchange membrane

Abstract

The utility model discloses a water permeability testing device for a membrane electrode and a proton exchange membrane, which comprises a left clamping plate and a right clamping plate which are used for clamping the membrane electrode or the proton exchange membrane, the left clamping plate and the right clamping plate are provided with grooves for forming a test cavity, and a convex part is arranged in the groove of the right clamping plate. The other parts in the groove form a drainage flow channel, the convex part comprises a middle convex rib arranged in the vertical direction, at least one fold line type convex rib is arranged on the two sides of the middle convex rib, and an outlet of the drainage flow channel is connected with a water collecting area below the drainage flow channel. By adopting the mode, the water permeability testing device for the membrane electrode and the proton exchange membrane has the advantages that the testing and mounting processes of the membrane electrode and the proton exchange membrane are simplified, a detection structure can be quickly obtained, and the membrane electrode and the proton exchange membrane can still be stacked for use after being tested.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to a water permeability testing device for membrane electrodes and proton exchange membranes. Background Art

[0002] Existing hydrogen fuel cell testing methods cannot test the water management of MEA in the fuel based on the test conditions. They can only analyze the internal water management based on the polarization curve, and cannot intuitively understand the actual water permeability of PEM. Therefore, in membrane electrode production, we can only repeatedly explore the selection of PEM, process improvement of MEA, and adjustment of operating conditions. In addition, some equipment for testing the water permeability of polymer membrane materials is expensive and cannot actually simulate the actual environment of hydrogen fuel cells in the operating system. Therefore, errors and omissions in experimental data and repeated testing are inevitable. Summary of the invention

[0003] The main technical problem solved by the utility model is to provide a water permeability testing device for membrane electrode and proton exchange membrane, which simplifies the testing and installation process of membrane electrode and proton exchange membrane, can quickly obtain the detection structure, and the membrane electrode and proton exchange membrane can still be stacked and used after the test.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a water permeability testing device for membrane electrode and proton exchange membrane, including a left clamping plate and a right clamping plate for clamping the membrane electrode or the proton exchange membrane, the left clamping plate and the right clamping plate have a groove forming a test cavity, the groove of the right clamping plate is provided with a raised portion, and the remaining portion in the groove constitutes a hydrophobic flow channel, the raised portion includes a middle convex rib arranged in the vertical direction, at least one folded line convex rib is arranged on both sides of the middle convex rib, and the outlet of the hydrophobic flow channel is connected to the water collection area below it.

[0005] In a preferred embodiment of the utility model, the left clamping plate is provided with an inlet A and an outlet B, and the right clamping plate is provided with an outlet C. The water vapor entering through the inlet A enters the right electrode plate and flows from the outlet C to the water collection area.

[0006] In a preferred embodiment of the present invention, a water collection channel is provided between the water collection area and the outlet C.

[0007] In a preferred embodiment of the present invention, a water outlet D communicating with the water collection channel is further provided on the inner side of the right clamping plate.

[0008] In a preferred embodiment of the present invention, the air outlet E is covered with a water-blocking and breathable membrane.

[0009] In a preferred embodiment of the present invention, the water collection area has scales.

[0010] In a preferred embodiment of the present invention, the folded-line convex rib is L-shaped, and the middle convex rib is straight-line.

[0011] In a preferred embodiment of the present invention, the number of the fold-line convex ribs on a single side is 1 or 2.

[0012] In a preferred embodiment of the present invention, the left clamping plate and the right clamping plate are detachably connected by bolts.

[0013] In a preferred embodiment of the present invention, the groove is a square groove.

[0014] The beneficial effects of the utility model are as follows: the water permeability testing device for membrane electrode and proton exchange membrane of the utility model only needs to directly clamp and install the membrane electrode or proton exchange membrane to perform the test, the water permeability test result can be directly observed from the water collection area, and the test is quick and convenient.

[0015] The utility model is a water permeability testing device for membrane electrodes and proton exchange membranes. The test chambers inside the left clamping plate and the right clamping plate have a large space, which ensures that the membrane electrodes or proton exchange membranes will not be compressed by pressure, thereby ensuring electrical performance. The tested membrane electrodes or proton exchange membranes can still be stacked and used later. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of a water permeability testing device for membrane electrode and proton exchange membrane of the utility model;

[0018] Figure 2 It is a structural diagram of the left splint;

[0019] Figure 3 It is a structural diagram of the right splint;

[0020] Figure 4 is the rear view of the right splint;

[0021] The markings of the components in the accompanying drawings are as follows: 1. left clamping plate, 2. right clamping plate, 3. groove, 4. raised part, 5. water collection channel, 6. water collection area, 7. installation hole. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiment of the utility model will be described clearly and completely below. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the scope of the technical content disclosed in the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of narration, and are not used to limit the scope that can be implemented. The change or adjustment of its relative relationship should also be regarded as the scope that can be implemented in the utility model without substantially changing the technical content.

[0023] See also Figures 1 to 4 , a water permeability testing device for membrane electrode and proton exchange membrane, comprising a left clamping plate 1 and a right clamping plate 2 for clamping the membrane electrode or the proton exchange membrane. The left clamping plate 1 and the right clamping plate 2 are provided with mounting holes 7, and the left clamping plate 1 and the right clamping plate 2 are connected and disassembled by bolts. The mounting structure is simple and easy to disassemble and assemble, which can improve the test efficiency. The left clamping plate 1 and the right clamping plate 2 are both made of highly transparent acrylic plates, and the right clamping plate 2 is hydrophobic. The highly transparent acrylic plates are convenient for directly observing the membrane electrode and the proton exchange membrane in the test state, and understanding the test situation in real time.

[0024] The left clamping plate 1 and the right clamping plate 2 have grooves 3 forming a test cavity, and the outer side of the groove 3 is sealed by a sealing ring. A raised portion 4 is provided in the groove 3 of the right clamping plate 2, and the remaining portion in the groove 3 constitutes a hydrophobic flow channel. The raised portion 4 includes a middle rib arranged in the vertical direction, and at least one folded rib is arranged on both sides of the middle rib, and the outlet of the hydrophobic flow channel is connected to the water collection area 6 below it. The test strong formed between the grooves 3 has a large space, which reserves enough space for the membrane electrode to prevent the membrane electrode from being compressed by the pressing force of the left clamping plate 1 and the right clamping plate 2, and ensure that the membrane electrode can continue to be used after the test. The folded rib is L-shaped, and the middle rib is straight. The number of the folded ribs on one side is 1 or 2. The middle rib and the folded rib support the membrane electrode and the proton exchange membrane, and the hydrophobic flow channel allows liquid and gas to pass through.

[0025] The left clamping plate 1 is provided with an inlet A and an outlet B, and the right clamping plate 2 is provided with an outlet C. The water vapor entering the inlet A enters the right clamping plate and flows from the outlet C to the water collection area 6. There is a water collection channel 5 between the water collection area 6 and the outlet C. The inner side of the right clamping plate 2 is also provided with a water outlet D and an air outlet E connected to the water collection channel 5. The air outlet E is covered with a water-blocking and breathable membrane. There is a scale on the water collection area 6, and the test results can be read directly from the scale. The groove 3 is a square groove. The gas / liquid enters from the inlet A above the left clamping plate 1, and then flows out from the outlet B below, and then enters the right clamping plate 2 through the permeation proton exchange membrane or membrane electrode. Since the outlet C is covered with a water-blocking and breathable membrane, the gas can flow out from the outlet C, and the water flows from the outlet C to the water collection channel 5 and then enters the water collection area 6 below. The test results are obtained through the scale on the water collection area 6. The outlet D is in a normally closed state, and the residual water in the device is discharged from the outlet D only after the test is completed.

[0026] Membrane electrode test steps:

[0027] 1. Place the right splint flat on the table.

[0028] 2. Take a 52×52mm MEA with a reaction area and lay it flat, press on the left clamping plate, and fix it with a screw assembly (30Kgf·cm).

[0029] 3. Connect the anode / cathode air inlet and outlet of the fuel cell test bench to the air inlet and outlet / water inlet of the device respectively, and connect the anode / cathode air outlet to the air outlet of the device for testing and observation.

[0030] 4. You can run any MEA test conditions, start the test and end the test, and calculate the water permeability per minute or hour.

[0031] Proton exchange membrane test steps:

[0032] 1. Place the right side of the splint flat on the table with the water collection channel facing upward.

[0033] 2. Take carbon paper with an area of ​​52×52mm and lay it flat, then take PEM with an area of ​​≥60×60mm and lay it flat, press the left clamping plate, and fix it with a screw group (30Kgf·cm).

[0034] 3. Connect the anode / cathode air inlet and outlet of the fuel cell test bench to the air inlet and outlet / water inlet of the device respectively, and connect the anode / cathode air outlet to the air outlet of the device for testing and observation.

[0035] 4. You can run any MEA test conditions, or use the water storage test method, start the test and end the test, and calculate the water penetration per minute or hour.

[0036] Water storage test method:

[0037] 1. Place the right side of the splint flat on the table with the water collection channel facing upward.

[0038] 2. Take carbon paper with an area of ​​52×52mm and lay it flat on the right plywood flow channel to place the support layer. Then take PEM with an area of ​​≥60×60mm and lay it flat, press it on the left plywood, and fix it with a screw assembly (no water leakage).

[0039] 3. Install the matching funnel-type water injection accessories, directly inject ultrapure water or other solutions required for testing, and start timing after filling. (If the test time is long or the water permeability is too large, the liquid level is lower than the water injection hole, and the liquid should be replenished in time.)

[0040] 4. Calculate the water penetration per minute or hour.

[0041] Different from the prior art, the utility model is a water permeability testing device for membrane electrode and proton exchange membrane, which simplifies the testing and installation process of membrane electrode and proton exchange membrane, can quickly obtain the detection structure, and the membrane electrode and proton exchange membrane can still be stacked and used after the test.

[0042] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A water permeability testing device for membrane electrode and proton exchange membrane, comprising a left clamping plate and a right clamping plate for clamping the membrane electrode or the proton exchange membrane, wherein the left clamping plate and the right clamping plate have grooves forming a test cavity, characterized in that: A raised portion is provided in the groove of the right splint, and the remaining portion of the groove constitutes a hydrophobic flow channel, the raised portion includes a middle convex rib arranged in the vertical direction, at least one fold line convex rib is arranged on both sides of the middle convex rib, and the outlet of the hydrophobic flow channel is connected to the water collection area below it.

2. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 1, characterized in that: The left clamping plate is provided with an inlet A and an outlet B, and the right clamping plate is provided with an outlet C. The water vapor entering the inlet A enters the right electrode plate and flows from the outlet C to the water collection area.

3. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 2, characterized in that: A water collection channel is provided between the water collection area and the outlet C.

4. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 3, characterized in that: The inner side of the right clamping plate is also provided with a water outlet D and an air outlet E which are connected with the water collecting channel.

5. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 4, characterized in that: The air outlet E is covered with a water-blocking and breathable membrane.

6. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 5, characterized in that: The water collection area has scales thereon.

7. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 1, characterized in that: The fold line convex rib is L-shaped, and the middle convex rib is straight line-shaped.

8. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 7, characterized in that: The number of the fold line convex ribs on one side is 1 or 2.

9. The water permeability testing device for membrane electrode and proton exchange membrane according to any one of claims 1 to 8, characterized in that: The left clamping plate and the right clamping plate are detachably connected by bolts.

10. The water permeability testing device for membrane electrode and proton exchange membrane according to claim 9, characterized in that: The groove is a square groove.

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