Membrane electrode spraying jig

Abstract

The utility model relates to the technical field of membrane electrode preparation, in particular to a membrane electrode spraying jig which comprises an upper cover plate, a partition plate frame, a supporting plate and a heating carbon plate, the upper cover plate is hinged to the supporting plate, the heating carbon plate is embedded into the supporting plate, a PEM membrane is flatly laid on the surface of the supporting plate, the partition plate frame is movably inserted into the upper cover plate, a groove is formed in the partition plate frame, and the partition plate frame is movably inserted into the upper cover plate. And a glass sheet is placed in the groove. The glass sheets are placed in the grooves in the partition plate frame, catalyst slurry can be sprayed to the glass sheets in the spraying process, the loading capacity of the catalyst on the PEM film is replaced with the loading capacity of the glass sheets, and the effect that the spraying loading capacity and uniformity of the catalyst can be rapidly and accurately recognized is achieved.

Description

Technical Field

[0001] The present application relates to the field of membrane electrode preparation technology, and in particular to a membrane electrode spraying tool. Background Art

[0002] The membrane electrode assembly (MEA) is a core component of water electrolysis and fuel cells, responsible for converting chemical energy into electrical energy. It typically consists of a proton exchange membrane (PEM), a catalyst layer (CL), and a gas diffusion layer (GDL). MEA fabrication technology is crucial for improving fuel cell efficiency, reducing costs, and achieving commercialization.

[0003] Currently, the main method for preparing membrane electrodes is the CCM method. By depositing a catalyst layer directly on the proton exchange membrane, the CCM method can effectively improve catalyst utilization and significantly reduce the proton transfer resistance between the PEM and the CL. Commonly used CCM methods include direct spraying, in which a slurry containing catalyst and proton conductive material is sprayed directly onto the proton exchange membrane. The catalyst loading on the PEM is a quantitative indicator of the active material content in the catalyst. The size of the loading determines the effective performance of the catalyst. The catalyst spraying uniformity and loading must be clearly controlled. Especially when spraying over large areas, edge effects are prone to occur, resulting in uneven spray thickness and affecting the overall performance of the membrane electrode.

[0004] Therefore, it is particularly important to design a membrane electrode spraying fixture that can quickly and accurately identify the catalyst spray loading and uniformity. Utility Model Content

[0005] In order to be able to quickly and accurately identify the catalyst spray loading and uniformity, the present application provides a membrane electrode spraying tool.

[0006] The membrane electrode spraying tool provided in this application adopts the following technical solution:

[0007] A membrane electrode spraying jig includes an upper cover plate, a partition frame, a support plate and a heating carbon plate. The upper cover plate and the support plate are hinged, the heating carbon plate is embedded in the support plate, the PEM membrane is laid flat on the surface of the support plate, the partition frame is movably inserted into the upper cover plate, and a groove is opened on the partition frame, in which a glass piece is placed.

[0008] Optionally, the partition frame is configured as a cross shape formed by integrating two vertical rods, and a plurality of slots are provided on the surface of the upper cover away from the support plate, and the four ends of the partition frame are respectively inserted into the slots of the support plate.

[0009] Optionally, the bottom wall of the groove is close to the side of the partition frame close to the support plate, and both sides of the groove are provided with taking grooves for convenient insertion of fingers.

[0010] Optionally, both side edges of the partition frame are processed into chamfers, and the side surface of the partition frame close to the support plate is flush with the side surface of the upper cover plate close to the support plate.

[0011] Optionally, the partition frame is composed of multiple vertical rods, and any two mutually perpendicular rods can be detachably plugged into each other. Multiple slots are opened on the surface of the upper cover plate away from the support plate, and the four ends of the partition frame are respectively inserted into the slots of the support plate.

[0012] Optionally, the partition frame is composed of multiple vertical rods, and any two mutually perpendicular rods can be detachably plugged into each other. Multiple slots are opened on the surface of the upper cover plate away from the support plate, and the four ends of the partition frame are respectively inserted into the slots of the support plate.

[0013] Optionally, the four side walls of the hollowed-out portion of the upper cover plate are provided with strip-shaped slide grooves, the slide grooves pass through the bottom wall of the slot, the end of the partition frame passes through the slot and enters the slide groove, and the partition frame is slidably connected to the slide groove.

[0014] Optionally, both ends of each rod on the partition frame are provided with fastening components for fixing the position of each rod on the partition frame at the upper cover plate.

[0015] Optionally, electromagnets are provided inside the upper cover plate and the support plate, and when power is turned on, the upper cover plate and the support plate are attracted magnetically.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. By placing a glass sheet in the groove on the partition frame, the catalyst slurry will be sprayed onto the glass sheet during the spraying process, replacing the catalyst loading on the PEM membrane with the loading on the glass sheet, thereby achieving the purpose of quickly and accurately identifying the catalyst spray loading and uniformity;

[0018] 2. Electromagnets are installed inside the upper cover and the support plate to clamp the PEM film, ensuring that the PEM is flat and preventing it from shifting during the spraying process.

[0019] 3. The partition frame is composed of multiple vertical rods, and any two mutually perpendicular rods can be detachably plugged in and fitted together. Any mutually perpendicular rods can also slide relative to each other to adjust the position of the rods to form spraying areas of different specifications, making the spraying area of ​​the entire membrane electrode spraying jig more flexible and more applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the membrane electrode spraying jig when it is opened in Example 1 of the present application;

[0021] Figure 2This is a schematic diagram of the structure of placing a glass sheet in the upper cover plate in Example 1 of the present application;

[0022] Figure 3 This is a schematic structural diagram of the chamfered corners of the partition frame in Example 1 of the present application;

[0023] Figure 4 This is a structural diagram of the position of the groove on a single rod of the partition frame in Example 2 of the present application;

[0024] Figure 5 This is a structural diagram of the partition frame assembled and plugged into the upper cover plate in the second embodiment of the present application;

[0025] Figure 6 This is a structural diagram of the installation of fasteners at the side wall of the upper cover plate in the second embodiment of the present application;

[0026] Figure 7 It is a cross-sectional view of a frame in the upper cover plate in the second embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. Upper cover; 11. Slot; 12. Slide; 2. Partition frame; 21. Groove; 211. Pick-up slot; 22. Strip slot; 3. Support plate; 31. Hinge; 4. Heating carbon plate; 41. Air vent; 5. Glass sheet; 6. Fastening assembly; 61. Fastening screw; 62. Adjustment slot. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0029] Example 1

[0030] The embodiment of the present application discloses a membrane electrode spraying tool. Figure 1 and Figure 2 A membrane electrode spraying tool includes an upper cover plate 1, a partition frame 2, a support plate 3 and a heated carbon plate 4. The upper cover plate 1 and the support plate are hinged, the heated carbon plate 4 is embedded in the support plate, and the partition frame 2 is movably inserted into the upper cover plate 1. The partition frame 2 is provided with a groove 21, and a glass sheet 5 is placed in the groove 21. When spraying the catalyst on the PEM membrane, the partition frame 2 is assembled on the upper cover plate 1, and then the PEM membrane is laid flat on the support plate 3. At the same time, the PEM membrane is covered with the heated carbon plate 4. The upper cover plate 1 is rotated until it fits with the support plate 3. At this time, the glass sheet 5 is placed in the groove 21, and then spraying is started. During the spraying process, the catalyst slurry will be sprayed onto the glass sheet 5, and the catalyst loading on the PEM membrane is replaced by the loading on the glass sheet 5, thereby achieving the purpose of being able to quickly and accurately identify the catalyst spray loading and uniformity.

[0031] Reference Figure 1The support plate 3 is horizontally placed on the operating table. The support plate 3 can be made of a material that does not deform when heated, such as steel or aluminum. An electromagnet is installed inside the support plate 3 to generate magnetism when energized. The electromagnet is embedded in the support plate 3 and does not protrude from the surface of the support plate 3. The heating carbon plate 4 is fixedly embedded horizontally in the center of the top surface of the support plate 3. The top surface of the heating carbon plate 4 is flush with the top surface of the support plate 3. The support plate 3 and the heating carbon plate 4 are installed as a whole. There is a heating resistor inside the heating carbon plate 4. The heat provided by the heating carbon plate 4 can help the solvent evaporate quickly, thereby making the catalyst layer dry and solidify faster.

[0032] In order to enhance the fit between the PEM membrane and the support plate 3, multiple rows of circular air holes 41 are evenly opened on the top surface of the heating carbon plate 4. An exhaust device is provided under the heating plate. The exhaust device is connected to the multiple rows of circular air holes 41, allowing vacuum operation to be performed during the spraying process, reducing the air gap between the PEM membrane and the support plate 3, making the surface of the PEM membrane smooth, and improving the uniformity of the PEM membrane spraying.

[0033] The support plate 3 and the heating carbon plate 4 are the membrane electrode placement areas. Size reference lines are set on the top surfaces of the support plate 3 and the heating carbon plate 4 to ensure that the PEM membrane can be placed in the center of the support plate 3 every time, reducing the impact of placement errors on the spraying quality. The size reference lines can be laser engraved or printed.

[0034] Reference Figure 1 and Figure 2 The upper cover plate 1 is a square frame with a hollow center. The upper cover plate 1 can also be made of a material that does not deform when heated, such as steel plate or aluminum plate. The upper cover plate 1 and the support plate 3 have the same length and width in the horizontal direction. A hinge 31 is provided between the side ends of the upper cover plate 1 and the side ends of the support plate 3. The side walls of the hinge 31 are fixedly connected to the upper cover plate 1. The two ends of the hinge 31 are designed as columns and are both inserted into the grooves at the ends of the support plate 3. The hinge 31 is rotatably connected to the support plate 3, and the upper cover plate 1 is opened and closed relative to the support plate 3 by the hinge. An electromagnet is also added to the interior of the upper cover plate 1. When power is applied, the electromagnet of the upper cover plate 1 is attracted to the electromagnet of the support plate 3. When the upper cover plate 1 is closed, the lower surface of the upper cover plate 1 is in contact with the top surface of the support plate 3 and the heated carbon plate 4, and the PEM membrane is clamped under the action of the electromagnet to ensure the flatness of the PEM and prevent the PEM from shifting during the spraying process.

[0035] Reference Figure 2 and Figure 3The partition frame 2 is configured as a cross shaped structure formed by integrating two vertical rods. The partition frame 2 is arranged parallel to the upper cover 1. The partition frame 2 is made of a material that does not deform under heat, such as a steel plate or an aluminum plate. To facilitate the installation of the partition frame 2, a plurality of slots 11 are provided on the surface of the upper cover 1 away from the support plate 3. The side walls of the slots 11 penetrate the side walls of the hollowed-out portion of the upper cover 1. The four ends of the partition frame 2 are thinned and then inserted into the slots 11 of the support plate 3. The side surface of the partition frame 2 close to the support plate 3 is flush with the side surface of the upper cover 1 close to the support plate 3. The edges on both sides of the partition frame 2 are chamfered to reduce sharp edges and corners, improve convenience and safety during assembly, and reduce slurry splashing and rebound during spraying.

[0036] Reference Figure 1 and Figure 2 The groove 21 on the partition frame 2 is located on the side of the partition frame 2 away from the support plate 3. There are multiple grooves 21, and four are used in this embodiment. The bottom wall of the groove 21 is close to the side of the partition frame 2 close to the support plate 3, so that the spraying surface of the glass sheet 5 in the groove 21 is closer to the PEM membrane, reducing the spraying error on the glass sheet 5 and the PEM membrane, so that the catalyst loading value detected on the glass sheet 5 is closer to the PEM membrane catalyst situation, thereby improving the measurement accuracy.

[0037] In order to facilitate the removal of the glass sheet 5 from the partition frame 2 for testing, refer to Figure 4 On either side of the groove 21 are finger-access slots 211, extending through the side of the separator frame 2 facing away from the support plate 3. The entire spray jig can spray a full, large PEM membrane, which can then be cut into four smaller membranes as needed. A glass sheet 5 can be placed freely within the spraying area, allowing for multiple evaluations of the spray load, verifying its actual value and uniformity without damaging the membrane electrode.

[0038] The implementation principle of a membrane electrode spraying jig in an embodiment of the present application is as follows: when spraying the catalyst, move the partition frame 2 close to the upper cover plate 1, and insert each end of the partition frame 2 into the slot 11 of the upper cover plate 1, use friction to limit the upper cover plate 1, and then lay the PEM membrane flat on the heated carbon plate 4, the four sides of the PEM membrane contact the support plate 3, rotate the upper cover plate 1, turn on the power, so that the electromagnets in the upper cover plate 1 and the support plate 3 work to form a magnetic field, and the upper cover plate 1 and the support plate 3 fit tightly together; place a glass sheet 5 in the groove 21 on the partition frame 2, turn on the power of the heated carbon plate 4, turn on the vacuum exhaust device, and then you can spray. After spraying, remove the glass sheet 5 for testing, turn off the heating carbon plate 4 and vacuum, turn off the electromagnet power of the upper cover plate 1 and the support plate 3, open the upper cover plate 1, and remove the membrane electrode. The membrane electrode can be cut according to use; at the same time, the spray load can be calculated based on the mass difference of the glass sheet 5 before and after spraying divided by the actual spray area of ​​the glass sheet 5, thereby achieving the purpose of quickly and accurately identifying the catalyst spray load and uniformity.

[0039] Example 2

[0040] The present embodiment discloses a membrane electrode spraying tool, the structure of which is basically the same as that of the first embodiment, except that: Figure 5 The partition frame 2 is composed of multiple vertical rods, and any two mutually perpendicular rods can be detachably plugged in. Any two mutually perpendicular rods close to each other are provided with strip grooves 22 on their sides. The strip grooves 22 run through the two side walls of the partition frame 2 rods. The thickness of the strip grooves 22 accounts for half of the thickness of the partition frame 2 rods. The thickness of any two mutually perpendicular rods after plugging is equal to the thickness of one rod. Any mutually perpendicular rods can also slide relative to each other to adjust the rod position to form spraying areas of different specifications, making the spraying area of ​​the entire membrane electrode spraying tool more flexible and more applicable.

[0041] In order to further facilitate the adjustment of the partition frame 2, refer to Figure 5 , a strip-shaped slide groove 12 is opened on the four side walls of the hollow part of the upper cover 1, and the ends of the four slide grooves 12 are connected. The slide groove 12 passes through the bottom wall of the slot 11, and the end of the partition frame 2 passes through the slot 11 and enters the slide groove 12. The partition frame 2 is slidably connected with the slide groove 12, and then the position of each rod on the partition frame 2 is slidably adjusted according to the requirements of spraying or cutting; refer to Figure 6 and Figure 7, both ends of each rod on the partition frame 2 are provided with a fastening assembly 6 to fix the position of each rod on the partition frame 2 at the upper cover plate 1 to reduce the displacement deviation during spraying. The fastening assembly 6 can adopt the combination of fastening screws 61 and adjusting slots 62. The adjusting slots 62 are opened at the four side walls of the upper cover plate 1. The adjusting slots 62 are parallel to the length direction of the side walls of the upper cover plate 1. The bottom wall of the adjusting slot 62 passes through the slide groove 12. The length of the adjusting slot 62 is consistent with the length of the slide groove 12. One end of the fastening assembly 6 passes through the adjusting slot 62 and is screwed into the threaded hole at the end of the rod of the partition frame 2, and the other end is pressed against the upper cover plate 1. It can be easily re-fixed after each adjustment to meet different spraying or cutting requirements and is easy to operate.

[0042] Dimension reference lines can be set on the surface of the upper cover plate 1 and the surface of the partition frame 2 to ensure that each rod of the partition frame 2 can accurately slide to the required position. The dimension reference lines can be laser engraved or printed.

[0043] When the partition frame 2 needs to be installed, first move the rod end in the partition frame 2 and insert it into the slot 11 of the upper cover 1, then move the rod to the desired position, rotate the fastening assembly 6 to fix the rod, and repeat the above operation for the rods of other partition frames 2 to complete the assembly of the partition frame 2.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A membrane electrode spraying tool, characterized in that: The invention comprises an upper cover plate (1), a partition frame (2), a support plate (3) and a heating carbon plate (4); the upper cover plate (1) and the support plate (3) are hingedly arranged; the heating carbon plate (4) is embedded in the support plate (3); the PEM membrane is laid flat on the surface of the support plate (3); the partition frame (2) is movably inserted into the upper cover plate (1); a groove (21) is provided on the partition frame (2); and a glass sheet (5) is placed in the groove (21).

2. The membrane electrode spraying tool according to claim 1, characterized in that: The partition frame (2) is configured in the shape of a cross formed by integrating two vertical rods. A plurality of slots (11) are provided on the side of the upper cover plate (1) away from the support plate (3). The four ends of the partition frame (2) are respectively inserted into the slots (11) of the support plate (3).

3. The membrane electrode spraying tool according to claim 2, characterized in that: The bottom wall of the groove (21) is close to the side of the partition frame (2) close to the support plate (3), and both sides of the groove (21) are provided with taking grooves (211) for convenient insertion of fingers.

4. The membrane electrode spraying tool according to claim 2, characterized in that: The edges on both sides of the partition frame (2) are processed into chamfers, and the side surface of the partition frame (2) close to the support plate (3) is flush with the side surface of the upper cover plate (1) close to the support plate (3).

5. The membrane electrode spraying tool according to claim 1, characterized in that: The partition frame (2) is composed of a plurality of vertical rods, and any two mutually vertical rods can be detachably plugged in and out of each other. A plurality of slots (11) are provided on the surface of the upper cover (1) away from the support plate (3), and the four ends of the partition frame (2) are respectively inserted into the slots (11) of the support plate (3).

6. The membrane electrode spraying tool according to claim 5, characterized in that: The sides of any two mutually perpendicular rods of the partition frame (2) close to each other are provided with strip grooves (22), the strip grooves (22) pass through the two side walls of the partition frame (2) rod, and the strip grooves (22) of any two mutually perpendicular rods are slidably connected.

7. The membrane electrode spraying tool according to claim 5, characterized in that: The four side walls of the hollowed-out portion of the upper cover (1) are all provided with strip-shaped slide grooves (12), the slide grooves (12) pass through the bottom wall of the slot (11), the end of the partition frame (2) passes through the slot (11) and enters the slide groove (12), and the partition frame (2) is slidably connected to the slide groove (12).

8. The membrane electrode spraying tool according to claim 7, characterized in that: Both ends of each rod on the partition frame (2) are provided with fastening components (6) for fixing the position of each rod on the partition frame (2) at the upper cover plate (1).

9. The membrane electrode spraying tool according to claim 1, characterized in that: Electromagnets are provided inside the upper cover plate (1) and the support plate (3). When power is supplied, the upper cover plate (1) and the support plate (3) are attracted magnetically.

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