Fixing assembly for fuel cell membrane electrode coating and coating device
By using a fixing component with stainless steel plates and silicone coating, the problems of spraying range control and contamination were solved, enabling efficient and clean spraying of fuel cell membrane electrode assembly (MEA), thus improving the application efficiency of catalyst and MEA performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-03-24
AI Technical Summary
Existing fuel cell spraying technology faces challenges in controlling the spraying range, and conventional fixing tools increase operational complexity and may introduce organic pollution, affecting catalyst layer performance.
The fixtures are made of stainless steel plates and have a silicone coating. The carefully designed spray nozzle structure ensures precise control of the spray area and the purity of the catalyst, avoiding contamination.
It improves the precision and safety of the spraying process, reduces catalyst waste and the risk of impurity introduction, and enhances the application efficiency of the catalyst and the performance of the membrane electrode.
Smart Images
Figure CN224025345U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fuel cell technical field especially relates to a kind of fixed assembly and coating device of fuel cell membrane electrode coating. BACKGROUND
[0002] Fuel cells are considered one of the most promising devices in future energy conversion technologies due to their potential in environmental protection and carbon neutrality. Developing efficient membrane electrode assemblies is crucial for the widespread application of fuel cells, as they are directly related to the energy conversion efficiency, power performance and overall stability of the cell. In the preparation technology of membrane electrode, the uniformity of catalyst coating is a key factor, which largely determines the performance of membrane electrode, the utilization rate of catalyst and its durability.
[0003] Currently, in the preparation of membrane electrode by traditional spraying method, high-pressure spray gun is usually used to atomize liquid catalyst slurry and spray it on proton exchange membrane. However, this method has challenges in controlling the spraying range, and existing equipment does not have special accessories to optimize this process.
[0004] In addition, in the conventional spraying process, in order to assist in fixing the proton exchange membrane, adhesive tape and other tools are often used, which not only increases the complexity of operation, but also may introduce organic contamination. These contaminations may have a negative impact on the performance of the catalyst layer, thereby affecting the overall performance of the fuel cell. Therefore, improving the spraying process, reducing contamination, and improving the uniformity and efficiency of catalyst coating are of great significance to improve the performance of fuel cells. SUMMARY
[0005] The utility model aims at providing a kind of fixed assembly and coating device of fuel cell membrane electrode coating, using fixed assembly can ensure the purity of membrane electrode spraying process, while effectively controlling the amount of catalyst used, and then realize the goal of cost saving.
[0006] In the first aspect, the utility model provides a kind of fixed assembly of fuel cell membrane electrode coating, comprising:
[0007] Stainless steel plate is provided with first spraying hole;
[0008] Silica gel coating is sprayed on one side of the stainless steel plate, the silica gel coating is used to abut with proton exchange membrane, the silica gel coating is provided with second spraying hole around the first spraying hole, and the first spraying hole and the second spraying hole are concentrically arranged.
[0009] The fixing assembly for fuel cell membrane electrode coating provided by the utility model realizes perfect combination of the thickness of the silica gel coating and the rigid support of the stainless steel plate, effectively avoids common problems such as misalignment and wrinkling of the coating. The silica gel coating not only effectively prevents scratches on the proton exchange membrane, but also provides additional anti-skid and stability performance, thereby enhancing the safety and accuracy of operation in the spraying process. The plate body made of stainless steel material will not pollute the catalyst, and the excellent corrosion resistance of stainless steel significantly reduces the risk of impurity introduction compared with materials such as aluminum material which is prone to rust and may cause chemical reaction. In addition, the first spraying hole and the second spraying hole designed carefully ensure accurate control of the spraying area, which not only avoids waste of the catalyst due to excessive spraying area, but also prevents adverse effects on the performance of the membrane electrode due to small area. These comprehensive design elements jointly ensure the repeatability and accuracy of the spraying process, greatly improving the application efficiency and effect of the catalyst.
[0010] Further, the transverse size of the first spraying hole is smaller than the transverse size of the second spraying hole.
[0011] By setting the transverse size of the first spraying hole to be smaller than the transverse size of the second spraying hole, the spraying gap is reserved at the spraying hole between the stainless steel plate and the silica gel coating, which helps to maintain the consistency and accuracy of spraying.
[0012] Further, the transverse interval distance between the edge of the first spraying hole and the edge of the second spraying hole is h1, wherein 0.01cm≤h1≤0.2cm.
[0013] Further, the stainless steel plate is a rectangular plate, and the first spraying hole and the second spraying hole are both rectangular holes.
[0014] Further, the edge length of the four edges of the first spraying hole is 5cm.
[0015] Further, the stainless steel plate is a circular plate, and the first spraying hole and the second spraying hole are both circular holes.
[0016] Further, the diameter of the first spraying hole is 5cm.
[0017] Further, the thickness of the stainless steel plate is h2, wherein 0.1mm≤h2≤0.5mm.
[0018] By adopting the above technical solution, the thickness of the stainless steel plate is designed to be 0.1mm-0.5mm, which can not only ensure that the stainless steel plate has appropriate rigidity and maintains structural strength, but also will not affect the temperature conduction of the heating plate due to excessive thickness.
[0019] Further, the thickness of the silica gel coating is h3, 10um≤h3≤100um.
[0020] By adopting the technical scheme, the thickness of the silica gel coating is designed as 10um-100um, and the silica gel coating directly abuts against the proton exchange membrane, which helps to ensure the flatness of the proton exchange membrane in the spraying process.
[0021] In a second aspect, the utility model provides a kind of fuel cell membrane electrode coating device, including the fixed assembly of any one of above fuel cell membrane electrode coating.
[0022] As can be known from the above, the fixed assembly for fuel cell membrane electrode coating provided by the utility model realizes the perfect combination of the thickness of silica gel coating and the rigid support of stainless steel plate, effectively avoids common problems such as misalignment and wrinkling of coating.The silica gel coating not only effectively prevents scratches on the proton exchange membrane, but also provides additional anti-slip and stability performance, thereby enhancing the safety and accuracy of operation during the spraying process.The plate body made of stainless steel does not pollute the catalyst, and compared with materials such as aluminum that are prone to rust and may cause chemical reactions, the excellent corrosion resistance of stainless steel significantly reduces the risk of introducing impurities.In addition, the first spraying hole and the second spraying hole are carefully designed to ensure accurate control of the spraying area, which not only avoids waste of catalyst due to excessive spraying area, but also prevents adverse effects on the performance of membrane electrode due to small area.These comprehensive design elements collectively ensure the repeatability and accuracy of the spraying process, greatly improving the application efficiency and effect of the catalyst.
[0023] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 A structure schematic view of the fixed assembly for fuel cell membrane electrode coating is provided in the utility model.
[0025] Figure 2 A structure schematic view of the fixed assembly for fuel cell membrane electrode coating is provided in the utility model. Figure 1 A structure schematic view of the fixed assembly for fuel cell membrane electrode coating is provided in the utility model.
[0026] Figure 3 A structure schematic view of another embodiment of the fixed assembly for fuel cell membrane electrode coating is provided in the utility model.
[0027] Figure 4 A structure schematic view of another embodiment of the fixed assembly for fuel cell membrane electrode coating is provided in the utility model. Figure 1A sectional enlarged structure schematic view of a fixed assembly for fuel cell membrane electrode coating.
[0028] In the drawings: 10, proton exchange membrane; 100, stainless steel plate; 110, first spraying hole; 200, silica gel coating; 210, second spraying hole. DETAILED DESCRIPTION
[0029] The embodiments of the present application will be described in detail below with reference to the drawings, wherein the same or similar components are denoted by the same reference numerals throughout the drawings. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.
[0030] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.
[0031] The fixed assembly for fuel cell membrane electrode coating disclosed by the present application is mainly applied to the process of spraying the proton exchange membrane. The use of the fixed assembly can ensure the purity of the membrane electrode spraying process, effectively control the amount of catalyst used, and thus achieve the goal of cost saving.
[0032] Referring to the drawings Figure 1 , the drawings Figure 2 In one embodiment, the fixed assembly for fuel cell membrane electrode coating includes a stainless steel plate 100 and a silica gel coating 200. The stainless steel plate 100 is provided with a first spraying hole 110; the silica gel coating 200 is sprayed on one side of the stainless steel plate 100, and the silica gel coating 200 is in abutment with the proton exchange membrane 10. The silica gel coating 200 is provided with a second spraying hole 210 around the first spraying hole 110, and the first spraying hole 110 and the second spraying hole 210 are concentrically arranged.
[0033] Specifically, the use process of the fixed assembly for fuel cell membrane electrode coating is as follows: after starting the ultrasonic spraying machine, first confirm the parameters, including the spraying track, the starting position and the liquid supply rate, etc. The proton exchange membrane (PEM membrane) is fixed in place by vacuum suction, and the silicone coating 200 is abutted against the proton exchange membrane to complete the pre-setting of the active area. Then, the catalyst slurry is sucked by a syringe and fixed on the spraying machine. After completing all the preparations before spraying, switch to the automatic mode, start the spraying operation, and the catalyst spray sprayed by the spraying machine passes through the first spraying hole 110 and the second spraying hole 210 in turn. In this process, it is necessary to observe whether the spraying is running normally in real time to ensure that the spraying effect meets the expected standard. After the spraying is completed, the stainless steel plate 100 is lifted to avoid any damage to the sprayed membrane electrode. The sprayed membrane electrode (MEA) is taken off from the heating plate, and the subsequent hot pressing transfer work is prepared. This step needs to ensure the integrity and surface cleanliness of the membrane electrode to ensure the quality and performance of the subsequent assembly. Then, the stainless steel plate 100 and the silicone coating 200 are cleaned to remove the residual catalyst slurry, ensuring the cleanliness of the equipment and the accuracy of the subsequent experiment.
[0034] As can be seen from the above, the fixed assembly for fuel cell membrane electrode coating provided by the utility model realizes the perfect combination of the thin thickness of the silicone coating 200 and the rigid support of the stainless steel plate 100, effectively avoids common problems such as misalignment and wrinkles of the coating. This silicone coating 200 not only effectively prevents scratches on the proton exchange membrane 10, but also provides additional anti-skid and stability performance, thereby enhancing the safety and accuracy of the operation during the spraying process. The plate body made of stainless steel material will not pollute the catalyst, and compared with materials such as aluminum material which is easy to rust and may cause chemical reaction, the excellent corrosion resistance of stainless steel significantly reduces the risk of introducing impurities. In addition, the first spraying hole 110 and the second spraying hole 210 are carefully designed to ensure the accurate control of the spraying area, which not only avoids the waste of catalyst caused by too large spraying area, but also prevents the adverse effects on the performance of the membrane electrode caused by too small area. These comprehensive design elements together ensure the repeatability and accuracy of the spraying process, greatly improving the application efficiency and effect of the catalyst.
[0035] In one of the embodiments, the transverse size of the first spraying hole 110 is smaller than the transverse size of the second spraying hole 210.
[0036] By setting the transverse size of the first spraying hole 110 to be smaller than the transverse size of the second spraying hole 210, the spraying gap is reserved at the spraying hole between the stainless steel plate 100 and the silicone coating 200, which helps to maintain the consistency and accuracy of the spraying.
[0037] In one of the embodiments, the lateral interval distance between the edge of the first spraying hole 110 and the edge of the second spraying hole 210 is h1, wherein 0.01cm≤h1≤0.2cm.
[0038] In one of the embodiments, the stainless steel plate 100 is a rectangular plate, and the first spraying hole 110 and the second spraying hole 210 are both rectangular holes.
[0039] Specifically, the rectangular plate can be a square plate or a rectangular plate.
[0040] In one of the embodiments, the length of the four edges of the first spraying hole 110 is 5cm. In other embodiments, the length of the four edges of the first spraying hole 110 can also be set to other sizes as needed.
[0041] Referring to the accompanying drawings Figure 3 In one of the embodiments, the stainless steel plate 100 is a circular plate, and the first spraying hole 110 and the second spraying hole 210 are both circular holes.
[0042] In one of the embodiments, the diameter of the first spraying hole 110 is 5cm. In other embodiments, the diameter of the first spraying hole 110 can also be set to other sizes as needed.
[0043] Referring to the accompanying drawings Figure 4 In one of the embodiments, the thickness of the stainless steel plate 100 is h2, wherein 0.1mm≤h2≤0.5mm.
[0044] With the above technical solution, the thickness of the stainless steel plate 100 is designed to be 0.1mm-0.5mm, which can not only ensure that the stainless steel plate 100 has appropriate rigidity and maintains structural strength, but also will not affect the temperature conduction of the heating plate due to excessive thickness.
[0045] In one of the embodiments, the thickness of the silica gel coating 200 is h3, wherein 10μm≤h3≤100μm.
[0046] With the above technical solution, the thickness of the silica gel coating 200 is designed to be 10μm-100μm, and the silica gel coating 200 directly abuts against the proton exchange membrane 10, which helps to ensure the flatness of the proton exchange membrane 10 during the spraying process.
[0047] The utility model also provides a fuel cell membrane electrode coating device comprising the fixed assembly of any one of the above embodiments.
[0048] Specifically, the fuel cell membrane electrode coating device comprises a vacuum suction machine and a spraying machine, the vacuum suction machine is used for sucking and fixing the proton exchange membrane 10, and the spraying machine is used for spraying the catalyst to the proton exchange membrane 10 falling through the first spraying hole 110 and the second spraying hole 210 in sequence.
[0049] In the description of the present specification, the description referring to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the described embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0050] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.
Claims
1. A fixing assembly for coating a fuel cell membrane electrode, characterized in that, include: Stainless steel plate (100) is provided with a first spray hole (110); A silicone coating (200) is sprayed onto one side of the stainless steel plate (100). The silicone coating (200) is used to abut against the proton exchange membrane (10). The silicone coating (200) has a second spray hole (210) around the first spray hole (110). The first spray hole (110) and the second spray hole (210) are concentrically arranged.
2. The fixing assembly for coating a fuel cell membrane electrode according to claim 1, characterized in that, The lateral dimension of the first spray hole (110) is smaller than the lateral dimension of the second spray hole (210).
3. The fixing assembly for coating a fuel cell membrane electrode according to claim 2, characterized in that, The lateral distance between the edge of the first spray hole (110) and the edge of the second spray hole (210) is h1, wherein 0.01cm≤h1≤0.2cm.
4. The fixing assembly for coating a fuel cell membrane electrode according to claim 1, characterized in that, The stainless steel plate (100) is a rectangular plate, and both the first spray hole (110) and the second spray hole (210) are rectangular holes.
5. The fixing assembly for coating a fuel cell membrane electrode according to claim 4, characterized in that, The four sides of the first spray hole (110) are all 5cm long.
6. The fixing assembly for coating a fuel cell membrane electrode according to claim 1, characterized in that, The stainless steel plate (100) is a circular plate, and the first spray hole (110) and the second spray hole (210) are both circular holes.
7. The fixing assembly for coating a fuel cell membrane electrode according to claim 6, characterized in that, The diameter of the first spray hole (110) is 5 cm.
8. The fixing assembly for coating a fuel cell membrane electrode according to claim 1, characterized in that, The thickness of the stainless steel plate (100) is h2, wherein 0.1mm≤h2≤0.5mm.
9. A fixing assembly for coating a fuel cell membrane electrode according to claim 1 or 8, characterized in that, The thickness of the silicone coating (200) is h3, where 10μm≤h3≤100μm.
10. A fuel cell membrane electrode coating apparatus, characterized in that, The fixed assembly for coating the fuel cell membrane electrode as described in any one of claims 1-9.