Runner plate structure for testing membrane electrode

Abstract

The utility model discloses a runner plate structure for testing a membrane electrode, which is simple in structure and easy to operate, and reduces the equipment cost and the labor cost of an enterprise. The device is suitable for testing the monocell membrane electrode, positioning holes are formed in the two end edges of a CCM frame of the monocell membrane electrode, and the device is characterized by comprising an anode runner plate, the anode runner plate comprises an anode runner plate body, the surface, attached to the monocell membrane electrode, of the anode runner plate body is a first working surface, and the first working surface is a second working surface; corresponding first insertion positioning holes are formed in the positions, corresponding to the positioning holes, of the first working surface; the cathode runner plate comprises a cathode runner plate body, the surface, attached to the monocell membrane electrode, of the cathode runner plate body is a second working surface, and a second insertion positioning hole is formed in the position, corresponding to the positioning hole, of the second working surface; and a group of positioning pins.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane battery testing, and specifically relates to a flow channel plate structure for membrane electrode testing. Background Art

[0002] The membrane electrode is composed of an anode gas diffusion layer, an anode catalyst layer, an electrolyte membrane (proton exchange membrane), a cathode catalyst, and a cathode gas diffusion layer stacked. After the membrane electrode is manufactured, it needs to be tested for power generation performance. During the power generation performance test, hydrogen needs to be continuously introduced into the positive electrode to cause oxidation at the positive electrode, and oxygen or air needs to be continuously introduced into the negative electrode to cause reduction at the negative electrode, thereby generating electricity. The existing structures for introducing gas into the positive or negative electrode are complex, and the air flow is unstable and unreliable, resulting in unstable power generation efficiency. Moreover, due to the complex existing gas ventilation structure, the testing tools are expensive and not easy to operate. Therefore, there is an urgent need to develop a gas ventilation structure with a simple structure and easy operation. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a flow channel plate structure for membrane electrode testing, which has a simple structure and is easy to operate, reducing the equipment cost and labor cost of enterprises.

[0004] A flow channel plate structure for membrane electrode testing is applicable to the testing of single-cell membrane electrodes. Positioning holes are provided at both ends of the CCM border of the single-cell membrane electrode. Its characteristics include:

[0005] An anode flow channel plate, which includes an anode flow channel plate body. The surface of the anode flow channel plate body that fits the single-cell membrane electrode is the first working surface. Corresponding first insertion positioning holes are provided at the positions of the first working surface corresponding to the positioning holes. A first serpentine concave flow channel is arranged within the area range of the anode catalyst layer of the single-cell membrane electrode on the first working surface of the anode flow channel plate body. A first air inlet hole is provided at the starting end of the first serpentine concave flow channel, and a first air outlet hole is provided at the end of the first serpentine concave flow channel. Both the first air inlet hole and the first air outlet hole penetrate through the thickness of the anode flow channel plate body and are through holes.

[0006] A cathode flow channel plate, which includes a cathode flow channel plate body. The surface of the cathode flow channel plate body that fits the single-cell membrane electrode is the second working surface. Corresponding second insertion positioning holes are provided at the positions of the second working surface corresponding to the positioning holes. A second serpentine concave flow channel is arranged within the area range of the cathode catalyst layer of the single-cell membrane electrode on the second working surface of the cathode flow channel plate body. A second air inlet hole is provided at the starting end of the second serpentine concave flow channel, and a second air outlet hole is provided at the end of the second serpentine concave flow channel. Both the second air inlet hole and the second air outlet hole penetrate through the thickness of the cathode flow channel plate body and are through holes.

[0007] and a set of positioning pins, the number of the positioning pins being the same as the number of the positioning holes;

[0008] Each of the positioning pins is arranged vertically. In the working state, both ends of each positioning pin are respectively inserted into the first insertion positioning hole, the positioning hole, and the second insertion positioning hole at corresponding positions. The single-cell membrane electrode is clamped between the anode flow channel plate and the cathode flow channel plate, and the first serpentine concave flow channel on the first working surface covers the area of the anode catalyst layer of the single-cell membrane electrode, and the second serpentine concave flow channel on the second working surface covers the area of the cathode catalyst layer of the single-cell membrane electrode.

[0009] It is further characterized in that:

[0010] The positioning holes on both ends of the CCM border of the single-cell membrane electrode are asymmetrically arranged, so that the corresponding positioning pins can ensure that the single-cell membrane electrode is not reversely installed during the test through a dislocation method;

[0011] The anode flow channel plate is arranged at the lower layer, the cathode flow channel plate is arranged at the upper layer, the upper surface of the anode flow channel plate body is the first working surface, and the lower surface of the cathode flow channel plate body is the second working surface;

[0012] Two of the positioning pins are respectively pre-inserted into the first insertion positioning holes and partially protrude upward. The corresponding positioning holes of the single-cell membrane electrode are sleeved and pre-installed on the upper surface of the anode flow channel plate body. After the second insertion positioning holes of the cathode flow channel plate are aligned with the protruding areas of the positioning pins, the cathode flow channel plate moves downward until the downward position is limited, so as to complete the stacking arrangement of the cathode flow channel plate, the single-cell membrane electrode, and the anode flow channel plate from top to bottom;

[0013] The first air inlet hole, the first air outlet hole, the second air inlet hole, and the second air outlet hole all include a small-diameter hole and a large-diameter hole. In the working state, one end of each air hole facing the single-cell membrane electrode is a small-diameter hole, and one end of each air hole away from the single-cell membrane electrode is a large-diameter hole;

[0014] The anode flow channel plate and the cathode flow channel plate have the same thickness and the same shape;

[0015] Hydrogen is introduced into the first air inlet hole, and gas flows out from the first air outlet hole. The first air inlet hole and the first air outlet hole are the same air holes;

[0016] Air is introduced into the second air inlet hole, and gas flows out from the second air outlet hole. The second air inlet hole and the second air outlet hole are the same air holes;

[0017] The first serpentine concave flow channel is a single-channel serpentine flow channel, and there is a set distance between adjacent transverse flow channels, such that the distances between all the remaining transverse flow channels except the first starting section flow channel are the same;

[0018] The first starting section flow channel is located outside the planar area of the anode catalyst layer of the single-cell membrane electrode. Since the first starting section flow channel needs to buffer the gas flow rate and thus the gas flow is not stable, it is arranged as a buffer flow channel outside the planar area of the anode catalyst layer of the single-cell membrane electrode to ensure that the gas flow in the flow channels corresponding to the planar area of the anode catalyst layer of the single-cell membrane electrode is uniform and reliable;

[0019] The second serpentine concave flow channel is a single-channel serpentine flow channel, and there is a set distance between adjacent transverse flow channels, such that the distances between all the remaining transverse flow channels except the second starting section flow channel are the same;

[0020] The second starting section flow channel is located outside the planar area of the cathode catalyst layer of the single-cell membrane electrode. Since the second starting section flow channel needs to buffer the gas flow rate and thus the gas flow is not stable, it is arranged as a buffer flow channel outside the planar area of the cathode catalyst layer of the single-cell membrane electrode to ensure that the gas flow in the flow channels corresponding to the planar area of the cathode catalyst layer of the single-cell membrane electrode is uniform and reliable.

[0021] After adopting the above technical solution, the position of the single-cell membrane electrode is fixed by the positioning pins aligning with the positioning holes and the first insertion positioning hole and the second insertion positioning hole, so that the active area and the flow channel area of the single-cell membrane electrode are arranged correspondingly. Hydrogen is introduced into the first air inlet, and the hydrogen flows along the first serpentine concave flow channel and undergoes an oxidation reaction under the action of the anode catalyst layer of the membrane electrode. Air is introduced into the second air inlet, and the oxygen in the air flows along the second serpentine concave flow channel and undergoes a reduction reaction under the action of the cathode catalyst layer of the membrane electrode; the first serpentine concave flow channel and the second serpentine concave flow channel uniformly distribute the gas to each part, enabling it to react fully and effectively; its structure is simple and the operation is simple, reducing the equipment cost and labor cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded perspective view of the present utility model (with a single-cell membrane electrode provided);

[0023] Figure 2 is a perspective view of the present utility model in the mold-closed state;

[0024] Figure 3 is a top view of the present utility model in the mold-closed state;

[0025] Figure 4 is Figure 3 the A-A cross-sectional view of

[0026] Figure 5 Schematic three-dimensional view of the anode flow field plate of the present utility model;

[0027] Figure 6 Schematic three-dimensional view of the cathode flow field plate of the present utility model;

[0028] The names corresponding to the serial numbers in the figure are as follows:

[0029] Positioning hole 1, small-diameter hole 2, large-diameter hole 3;

[0030] Single-cell membrane electrode 10, anode flow field plate 20, anode flow field plate body 21, first insertion positioning hole 22, first serpentine concave flow channel 23, first transverse flow channel 231, first starting section flow channel 232, first air inlet hole 24, first air outlet hole 25, cathode flow field plate 30, cathode flow field plate body 31, second insertion positioning hole 32, second serpentine concave flow channel 33, second transverse flow channel 331, second starting section flow channel 332, second air inlet hole 34, second air outlet hole 35, positioning pin 40. Specific embodiments

[0031] A flow field plate structure for testing membrane electrodes, as shown in Figures 1-6 , which is applicable to the test of the single-cell membrane electrode 10. Positioning holes 1 are provided at both ends of the CCM border of the single-cell membrane electrode 10, and the positioning holes 1 at both ends of the CCM border of the single-cell membrane electrode 10 are asymmetrically arranged. A flow field plate structure for testing membrane electrodes includes: an anode flow field plate 20, a cathode flow field plate 30, and a set of positioning pins 40. The number of positioning pins 40 corresponds to the number of positioning holes 1 and is two.

[0032] The anode flow field plate 20 includes an anode flow field plate body 21. The surface of the anode flow field plate body 21 that fits the single-cell membrane electrode is the first working surface. At the position corresponding to the positioning hole 1 on the first working surface, a corresponding first insertion positioning hole 22 is provided. The first serpentine concave flow channel 23 is arranged within the area range of the anode catalyst layer of the single-cell membrane electrode 10 on the first working surface of the anode flow field plate body 21. The starting end of the first serpentine concave flow channel 23 is provided with a first air inlet hole 24, and the end of the first serpentine concave flow channel 23 is provided with a first air outlet hole 25. Both the first air inlet hole 24 and the first air outlet hole 25 penetrate through the thickness of the anode flow field plate body 21 and are through holes;

[0033] The cathode flow channel plate 30 includes a cathode flow channel plate body 31, the surface of the cathode flow channel plate body 31 that is attached to the single cell membrane electrode 10 is the second working surface, and a second insertion positioning hole 32 is arranged at the position of the second working surface corresponding to the positioning hole 1, and a second serpentine concave flow channel 33 is arranged in the surface area of the cathode catalyst layer of the single cell membrane electrode 10 on the second working surface of the cathode flow channel plate body 31, and a second air inlet 34 is arranged at the starting end of the second serpentine concave flow channel 33, and a second air outlet 35 is arranged at the end of the second serpentine concave flow channel 33, and the second air inlet 34 and the second air outlet 35 both penetrate the thickness of the cathode flow channel plate body 31 and are through holes;

[0034] Each positioning pin 40 is arranged vertically, and in the working state, the two ends of each positioning pin 40 are respectively inserted into the first insertion positioning hole 22, the positioning hole 1, and the second insertion positioning hole 32 at the corresponding positions. The single cell membrane electrode 10 is clamped between the anode flow channel plate 20 and the cathode flow channel plate 30, and the first serpentine concave flow channel 23 on the first working surface covers the surface area of the anode catalyst layer of the single cell membrane electrode 10, and the second serpentine concave flow channel 33 on the second working surface covers the surface area of the cathode catalyst layer of the single cell membrane electrode 10.

[0035] In specific implementation, one of the positioning holes of the CCM frame of the single cell membrane electrode is arranged at the length center of the end edge, and the other positioning hole is set at the non-length center of the corresponding end edge. The first plug-in positioning hole 22 is arranged according to the fitting position corresponding to the anode catalyst layer, and the second plug-in positioning hole 32 is arranged according to the fitting position corresponding to the cathode catalyst layer, so that the aligned positioning pins 40 can ensure that the single cell membrane electrode 10 will not be installed upside down during the test process through staggered manner.

[0036] In a specific embodiment, the anode flow channel plate 20 is arranged at the lower layer, the cathode flow channel plate 30 is arranged at the upper layer, the upper surface of the anode flow channel plate body 21 is the first working surface, and the lower surface of the cathode flow channel plate body 31 is the second working surface;

[0037] The two positioning pins 40 are pre-inserted into the first insertion positioning holes 22, and part of them are convex. The corresponding positioning hole 1 of the single cell membrane electrode 10 is inserted into the positioning pin 40 and then pre-installed on the upper surface of the anode flow channel plate body 21. After the second insertion positioning hole 32 of the cathode flow channel plate 30 is aligned with the convex area of the positioning pin 40, the cathode flow channel plate 30 moves downward until the downward position is limited, thereby completing the top-down stacking arrangement of the cathode flow channel plate 30, the single cell membrane electrode 10, and the anode flow channel plate 20;

[0038] The first intake hole 24, the first outlet hole 25, the second intake hole 34, and the second outlet hole 35 each include a small-diameter hole 2 and a large-diameter hole 3. In the working state, the end of each hole facing the single-cell membrane electrode 10 is the small-diameter hole 2, and the end of each hole away from the single-cell membrane electrode is the large-diameter hole 3.

[0039] The anode flow channel plate 20 and the cathode flow channel plate 30 have the same thickness and the same shape, which makes the production convenient and fast.

[0040] Hydrogen is introduced into the first intake hole 24, and gas flows out from the first outlet hole 25. The first intake hole 24 and the first outlet hole 25 are the same hole.

[0041] Air is introduced into the second intake hole 34, and gas flows out from the second outlet hole 35. The second intake hole 34 and the second outlet hole 35 are the same hole.

[0042] The first serpentine concave flow channel 23 is a single-channel serpentine flow channel. There is a set distance between adjacent first transverse flow channels 231, so that the spacing of all the first transverse flow channels 231 except the first starting section flow channel 232 is the same. In a specific embodiment, the flow channel groove width of the first serpentine concave flow channel 23 is 1 mm, the groove spacing is 0.8 mm, and the groove depth is 0.5 mm.

[0043] The first starting section flow channel 232 is located outside the area range of the anode catalyst layer of the single-cell membrane electrode 10. Since the first starting section flow channel 232 needs to buffer the gas flow rate and the gas flow is not stable, it is arranged as a buffer flow channel outside the area range of the anode catalyst layer of the single-cell membrane electrode 10 to ensure that the gas flow in the flow channel corresponding to the area range of the anode catalyst layer of the single-cell membrane electrode 10 is uniform and reliable.

[0044] The second serpentine concave flow channel 33 is a single-channel serpentine flow channel. There is a set distance between adjacent second transverse flow channels 331, so that the spacing of all the second transverse flow channels 331 except the second starting section flow channel 332 is the same. In a specific embodiment, the flow channel groove width of the second serpentine concave flow channel 33 is 1 mm, the groove spacing is 0.8 mm, and the groove depth is 0.5 mm.

[0045] The second starting section flow channel 332 is located outside the area range of the cathode catalyst layer of the single-cell membrane electrode 10. Since the second starting section flow channel 332 needs to buffer the gas flow rate and the gas flow is not stable, it is arranged as a buffer flow channel outside the area range of the cathode catalyst layer of the single-cell membrane electrode 10 to ensure that the gas flow in the flow channel corresponding to the area range of the cathode catalyst layer of the single-cell membrane electrode 10 is uniform and reliable.

[0046] During actual operation, the upper and lower positions of the anode flow field plate 20 and the cathode flow field plate 30 can be interchanged, and thus the positions of the anode and cathode of the single-cell membrane electrode 10 are interchanged. The positioning pins 40 are pre-inserted into the cathode flow field plate 30, and then the stacking operation is carried out.

[0047] During specific implementation, the flow channels of the anode flow field plate 20 and the cathode flow field plate 30 adopt a single-channel serpentine flow channel. The serpentine flow channel helps the full flow and diffusion of the gas inside the battery, and improves the power generation efficiency of the battery at high current density; the anode flow field plate 20 and the cathode flow field plate 30 are made of graphite material, and the graphite material has the characteristics of good high-temperature stability, good conductivity, strong corrosion resistance, etc., and is very suitable for the production of flow field plates; the positioning pins 40 using the left-right dislocation method can effectively avoid the reverse installation of the anode and cathode of the single cell.

[0048] Its working principle is as follows: The position of the single-cell membrane electrode is fixed by the positioning pins aligning with the positioning holes, the first insertion positioning hole and the second insertion positioning hole, so that the active area and the flow channel area of the single-cell membrane electrode are arranged correspondingly. Hydrogen is introduced into the first air inlet hole, and the hydrogen flows along the first serpentine concave flow channel and undergoes an oxidation reaction under the action of the anode catalyst layer of the membrane electrode. Air is introduced into the second air inlet hole, and the oxygen in the air flows along the second serpentine concave flow channel and undergoes a reduction reaction under the action of the cathode catalyst layer of the membrane electrode; the first serpentine concave flow channel and the second serpentine concave flow channel evenly distribute the gas to each part, enabling it to fully and effectively react; the serpentine flow channel helps the full flow and diffusion of the gas inside the battery, improves the power generation efficiency of the battery at high current density, has a simple structure and simple operation, and reduces the equipment cost and labor cost of the enterprise.

[0049] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0050] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flow channel plate structure for membrane electrode testing, which is applicable to the testing of single-cell membrane electrodes. Positioning holes are provided at both ends of the CCM border of the single-cell membrane electrode. It is characterized in that, It includes: An anodic flow field plate, which includes an anodic flow field plate body. The surface of the anodic flow field plate body that fits the single-cell membrane electrode is the first working surface. At the position corresponding to the positioning hole on the first working surface, a corresponding first insertion positioning hole is provided. Within the area range corresponding to the anodic catalytic layer of the single-cell membrane electrode on the first working surface of the anodic flow field plate body, a first serpentine concave flow channel is arranged. A first air inlet hole is provided at the starting end of the first serpentine concave flow channel, and a first air outlet hole is provided at the end of the first serpentine concave flow channel. Both the first air inlet hole and the first air outlet hole penetrate through the thickness of the anodic flow field plate body and are through holes. A cathodic flow field plate, which includes a cathodic flow field plate body. The surface of the cathodic flow field plate body that fits the single-cell membrane electrode is the second working surface. At the position corresponding to the positioning hole on the second working surface, a second insertion positioning hole is provided. Within the area range corresponding to the cathodic catalytic layer of the single-cell membrane electrode on the second working surface of the cathodic flow field plate body, a second serpentine concave flow channel is arranged. A second air inlet hole is provided at the starting end of the second serpentine concave flow channel, and a second air outlet hole is provided at the end of the second serpentine concave flow channel. Both the second air inlet hole and the second air outlet hole penetrate through the thickness of the cathodic flow field plate body and are through holes. And a set of positioning pins, the number of the positioning pins being the same as the number of the positioning holes. Each of the positioning pins is vertically arranged. In the working state, both ends of each positioning pin are respectively inserted into the first insertion positioning holes and the positioning holes at the corresponding positions, and the second insertion positioning holes. The single-cell membrane electrode is clamped between the anodic flow field plate and the cathodic flow field plate. Moreover, the first serpentine concave flow channel on the first working surface covers the area range of the anodic catalytic layer of the single-cell membrane electrode, and the second serpentine concave flow channel on the second working surface covers the area range of the cathodic catalytic layer of the single-cell membrane electrode.

2. The flow channel plate structure for membrane electrode testing according to claim 1, wherein: The positioning holes at both ends of the CCM border of the single-cell membrane electrode are asymmetrically arranged.

3. The flow channel plate structure for membrane electrode testing according to claim 2, characterized in that: The anodic flow field plate is arranged at the lower layer, and the cathodic flow field plate is arranged at the upper layer. The upper surface of the anodic flow field plate body is the first working surface, and the lower surface of the cathodic flow field plate body is the second working surface.

4. A flow channel plate structure for membrane electrode testing according to claim 3, characterized in that: Two of the positioning pins are respectively pre-inserted into the first insertion positioning holes and partially protrude upwards. The corresponding positioning holes of the single-cell membrane electrode are sleeved and pre-installed on the upper surface of the anodic flow field plate body. After the second insertion positioning holes of the cathodic flow field plate are aligned with the protruding areas of the positioning pins, the cathodic flow field plate moves downward until the downward position is limited, thereby completing the stacking arrangement of the cathodic flow field plate, the single-cell membrane electrode, and the anodic flow field plate from top to bottom.

5. A flow channel plate structure for membrane electrode testing according to claim 1, characterized in that: The first air inlet hole, the first air outlet hole, the second air inlet hole, and the second air outlet hole all include a small-diameter hole and a large-diameter hole. In the working state, the end of each air hole facing the single-cell membrane electrode is a small-diameter hole, and the end of each air hole away from the single-cell membrane electrode is a large-diameter hole.

6. The flow channel plate structure for membrane electrode testing according to claim 1, characterized in that: The anodic flow field plate and the cathodic flow field plate have the same thickness and the same shape.

7. A flow channel plate structure for membrane electrode testing according to claim 3, characterized in that: Hydrogen is introduced into the first intake hole, and gas flows out of the first outlet hole. The first intake hole and the first outlet hole are the same hole.

8. A flow channel plate structure for membrane electrode testing according to claim 3, characterized in that: Air is introduced into the second intake hole, and gas flows out of the second outlet hole. The second intake hole and the second outlet hole are the same hole.

9. A flow channel plate structure for membrane electrode testing according to claim 1, characterized in that: The first serpentine concave flow channel is a single-channel serpentine flow channel, and a set distance is provided between adjacent transverse flow channels, such that the distances between all the remaining transverse flow channels except the first starting section flow channel are the same; the first starting section flow channel is located outside the area range of the anode catalyst layer of the single cell membrane electrode.

10. A flow channel plate structure for membrane electrode testing according to claim 1, characterized in that: The second serpentine concave flow channel is a single-channel serpentine flow channel, and a set distance is provided between adjacent transverse flow channels, such that the distances between all the remaining transverse flow channels except the second starting section flow channel are the same; the second starting section flow channel is located outside the area range of the cathode catalyst layer of the single cell membrane electrode.

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