Membrane electrode packaging jig
Through the use of membrane electrode packaging fixtures, the problems of uneven stress and thin brittle film packaging in water electrolytic cell separator packaging are solved, and efficient and low-cost membrane electrode packaging is achieved, which is suitable for thin brittle film electrodes.
Patent Information
- Application Number
- CN202323334830.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-07
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-07
AI Technical Summary
In the existing water electrolytic cell diaphragm packaging process, uneven stress is prone to occur, resulting in air leakage, especially for the packaging of thin and brittle proton exchange membranes and anion exchange membranes, with high packaging threshold and high cost.
The membrane electrode encapsulation tool is adopted to adsorb the first frame film through the first adsorption mechanism, the second frame film is adsorbed, and the third adsorption mechanism is adsorbed the catalyst coating film, and an adhesive layer is provided on both sides of the frame film. Achieve simple bonding packaging of membrane electrodes, avoid bending, and reduce packaging thresholds and costs.
It improves the efficiency and accuracy of membrane electrode packaging, reduces packaging costs, and avoids the complexity of hot pressing treatment. It is suitable for packaging of thin brittle membrane electrodes.
Smart Images
Figure CN222160379U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogen production by water electrolysis cell, in particular to a membrane electrode packaging jig. Background Art
[0002] Hydrogen production by water electrolysis is a key energy conversion technology that can produce hydrogen and oxygen by electrolyzing water. It is currently widely used in the production of clean energy. In a water electrolysis cell, the diaphragm plays a key role. It can effectively isolate the anode and cathode, allowing the hydrogen and oxygen produced by the electrolysis of water to be collected separately, thereby improving the electrolysis efficiency and gas purity.
[0003] At present, water electrolyzers mainly include alkaline water electrolyzers, PEMWE (proton exchange membrane water electrolyzers) and AEMWE (anion exchange membrane water electrolyzers). The diaphragm used in alkaline electrolysis water electrolyzers is a permeable diaphragm, which has the characteristics of alkali corrosion resistance, small pore size, large porosity and good hydrophilicity. The diaphragms of PEMWE and AEMWE are generally used in the structure of membrane electrode assembly (MEA), and the structure of MEA mainly includes gas diffusion layer (GDL), catalyst layer (CL), proton exchange membrane (PEM) or anion exchange membrane (AEM) and sealing frame. The catalyst slurry is directly coated on both sides of PEM / AEM, and the three-in-one formed after drying is called catalyst-coated membrane (CCM). Then, a sealing frame film is set on both sides of the CCM. The sealing frame film has four functions: one is to seal the MEA to prevent leakage of the reaction gas; the second is to act as an insulator, which separates the bipolar plates through the non-conductivity of its own material to prevent short circuit between the positive and negative electrodes of the battery; the third is to protect the PEM / AEM to prevent the PEM from being torn due to direct pressure; the fourth is to adjust the compression rate of the GDL by changing the thickness of the frame to prevent overpressure during the assembly of the battery stack.
[0004] In the prior art, the packaging of water electrolyzer diaphragms usually adopts a dispensing process and hot pressing treatment to seal the diaphragms. However, uneven force is prone to occur during the hot pressing process, and leakage may occur at the edge of the electrolyzer diaphragm. This packaging process not only has a high threshold, but also is difficult to apply to membrane electrode packaging of PEMWE or AEMWE, because diaphragms such as AEM (anion exchange membrane) and PEM (proton exchange membrane) are usually very thin and fragile, which brings certain challenges to packaging.
[0005] Therefore, a membrane electrode packaging fixture or a new packaging process is urgently needed to solve the above problems. Utility Model Content
[0006] The purpose of the utility model is to provide a membrane electrode packaging jig, which does not require a dispensing machine and a hydraulic press for hot pressing, lowers the threshold of membrane electrode packaging technology, and also reduces packaging costs. In addition, the packaging jig of the present invention is simple to use and easy to operate, and improves the packaging efficiency of the membrane electrode and the frame film.
[0007] In order to achieve the above objectives, the following technical solutions are provided:
[0008] A membrane electrode packaging fixture comprises a first adsorption mechanism, a second adsorption mechanism and a third adsorption mechanism, wherein the first adsorption mechanism is configured to adsorb a first frame film, the second adsorption mechanism is configured to adsorb a second frame film, and the third adsorption mechanism is configured to adsorb a catalyst coating film, wherein the first frame film and the second frame film are arranged on both sides of the catalyst coating film, and an adhesive layer is arranged on one side of the first frame film and the second frame film facing the catalyst coating film to bond the catalyst coating film, the first frame film and the second frame film.
[0009] As a preferred embodiment, the third adsorption mechanism comprises:
[0010] An adsorption boss and a suction cup body, wherein the adsorption boss is arranged on a side of the suction cup body close to the catalyst coating membrane, the surface of the adsorption boss is an adsorption surface, and the area of the adsorption surface is the same as the area of the catalyst coating membrane.
[0011] As a preferred solution, a protective layer is provided on a side of the adsorption boss close to the catalyst coating membrane.
[0012] As a preferred solution, the membrane electrode packaging fixture further includes:
[0013] A positioning mechanism, wherein the positioning mechanism can pass through the first adsorption mechanism, the first frame film, the second frame film, the second adsorption mechanism and the third adsorption mechanism.
[0014] As a preferred solution, the positioning mechanism includes:
[0015] A base and a positioning member, wherein the length of the positioning member is greater than the sum of the thicknesses of any two of the first adsorption mechanism, the second adsorption mechanism and the third adsorption mechanism.
[0016] As a preferred solution, the adsorption surfaces of the first adsorption mechanism, the second adsorption mechanism and the third adsorption mechanism all have a plurality of adsorption holes, and the adsorption holes are microporous structures.
[0017] As a preferred solution, the diameter of the adsorption holes is 1 mm-4 mm.
[0018] As a preferred solution, the first adsorption mechanism and the second adsorption mechanism have the same structure and are arranged relative to each other.
[0019] As a preferred solution, the second frame film is a ring structure, and the first adsorption mechanism, the first frame film, the catalyst coating film, the second frame film, the second adsorption mechanism and the third adsorption mechanism are coaxially arranged. As a preferred solution, the adhesive layer is a pressure-sensitive adhesive or a hot-melt adhesive.
[0020] Compared with the prior art, the beneficial effects of the utility model are:
[0021] The membrane electrode packaging fixture provided by the utility model realizes support of the first frame film by the first adsorption mechanism, support of the second frame film by the second adsorption mechanism, and support of the catalyst coating film by the third adsorption mechanism by the catalyst coating film, by arranging the first adsorption mechanism to adsorb the first frame film, the second adsorption mechanism to adsorb the second frame film, and the third adsorption mechanism to adsorb the catalyst coating film, thereby preventing the first frame film, the second frame film, and the catalyst coating film from bending during the packaging process, which helps to improve the packaging effect; by arranging an adhesive layer on the side of the first frame film and the second frame film facing the catalyst coating film, the catalyst coating film, the first frame film, and the second frame film are bonded, the operation is simple, and no dispensing machine and hydraulic press are required for hot pressing treatment, which lowers the threshold of packaging membrane electrode technology, reduces packaging costs, and improves packaging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.
[0023] Figure 1 A schematic structural diagram of a membrane electrode packaging fixture provided in an embodiment of the utility model.
[0024] Reference numerals:
[0025] 100. Membrane electrode packaging fixture;
[0026] 10. The first adsorption mechanism;
[0027] 20. Second adsorption mechanism; 21. Positioning hole;
[0028] 30. third adsorption mechanism; 31. suction cup body; 32. adsorption boss;
[0029] 40. Positioning mechanism; 41. Base; 42. Positioning member;
[0030] 200, membrane electrode; 210, first frame film; 220, second frame film; 2201, adhesive layer; 230, catalyst coating membrane. DETAILED DESCRIPTION
[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0037] In the prior art, the packaging of the catalyst coating membrane and the sealing frame membrane usually adopts a dispensing process and a hot pressing process to seal the membrane electrode. However, uneven force is prone to occur during the hot pressing process, and air leakage may occur at the edge of the electrolyzer diaphragm. In addition, this process is difficult to apply to AEM / PEM thin film electrodes, resulting in low efficiency of membrane electrode packaging.
[0038] In order to solve the above problems, Figure 1 As shown, the present embodiment provides a membrane electrode packaging jig 100, which includes a first adsorption mechanism 10, a second adsorption mechanism 20 and a third adsorption mechanism 30. The first adsorption mechanism 10 is used to adsorb the first frame film 210, the second adsorption mechanism 20 is used to adsorb the second frame film 220, and the third adsorption mechanism 30 is used to adsorb the catalyst coating film 230. The first frame film 210 and the second frame film 220 are arranged on both sides of the catalyst coating film 230, and an adhesive layer 2201 is arranged on the side of the first frame film 210 and the second frame film 220 facing the catalyst coating film 230 to bond the catalyst coating film 230, the first frame film 210 and the second frame film 220.
[0039] By setting the first adsorption mechanism 10 to adsorb the first frame film 210, the second adsorption mechanism 20 to adsorb the second frame film 220, and the third adsorption mechanism 30 to adsorb the catalyst coating film 230, the first adsorption mechanism 10 supports the first frame film 210, the second adsorption mechanism 20 supports the second frame film 220, and the third adsorption mechanism 30 supports the catalyst coating film 230, thereby preventing the first frame film 210, the second frame film 220 and the catalyst coating film 230 from bending during the packaging process, which helps to improve the packaging effect; by setting the adhesive layer 2201 on the side of the first frame film 210 and the second frame film 220 facing the catalyst coating film 230, the catalyst coating film 230, the first frame film 210 and the second frame film 220 are bonded, the operation is simple, and no dispensing machine and hydraulic press are required for hot pressing treatment, which lowers the threshold of the packaging membrane electrode 200 technology, also reduces the packaging cost, and improves the packaging efficiency.
[0040] It should be noted that the first frame film 210 and the second frame film 220 are respectively packaged on both sides of the catalyst coating membrane 230 to assemble the membrane electrode 200. The catalyst coating membrane 230 is formed by directly coating the catalyst slurry on both sides of the PEM / AEM.
[0041] It is understandable that the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30 are all provided with suction holes, which are connected to the negative pressure component to adsorb the first frame film 210, the second frame film 220 and the catalyst coating film 230. The negative pressure component can be a vacuum pump or a negative pressure generator.
[0042] Specifically, the adhesive layer 2201 is a pressure-sensitive adhesive or a hot-melt adhesive, which facilitates quick bonding of the first frame film 210 , the second frame film 220 and the catalyst coating film 230 , and is easy to operate.
[0043] Furthermore, if Figure 1 As shown, the membrane electrode packaging fixture 100 also includes a positioning mechanism 40, which can pass through the first adsorption mechanism 10, the first frame film 210, the second frame film 220, the second adsorption mechanism 20 and the third adsorption mechanism 30, so as to facilitate the precise positioning of the first frame film 210, the second frame film 220 and the catalyst coating film 230.
[0044] Specifically, if Figure 1As shown, the positioning mechanism 40 includes a base 41 and a positioning member 42, and the positioning member 42 is arranged on the base 41. The positioning member 42 is located on the side of the first adsorption mechanism 10 away from the second adsorption mechanism 20, and the positioning member 42 passes through the first adsorption mechanism 10, the first frame film 210, the second frame film 220, the second adsorption mechanism 20 and the third adsorption mechanism 30 to achieve accurate positioning of the first frame film 210, the second frame film 220 and the catalyst coating film 230. Among them, the positioning member 42 can be a screw, which passes through the first adsorption mechanism 10, the first frame film 210, the second frame film 220, the second adsorption mechanism 20 and the third adsorption mechanism 30 and can be disassembled.
[0045] The length of the positioning member 42 is greater than the sum of the thicknesses of any two of the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30. To ensure that the positioning member 42 has sufficient length, the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30 are positioned and assembled.
[0046] Furthermore, there are multiple positioning members 42, which are spaced apart around the base 41 to improve the positioning effect of the positioning members 42 on the first adsorption mechanism 10, the first frame film 210, the second frame film 220, the second adsorption mechanism 20 and the third adsorption mechanism 30.
[0047] Combination Figure 1 The specific structure of the second adsorption mechanism 20 is described as follows. Figure 1 As shown, a plurality of positioning holes 21 are provided on the circumference of the second adsorption mechanism 20, and the positioning members 42 are inserted into the positioning holes 21 to achieve accurate positioning of the second adsorption mechanism 20. The positioning holes 21 and the positioning members 42 are arranged one by one.
[0048] It should be noted that the first adsorption mechanism 10 and the second adsorption mechanism 20 have the same structure and are disposed opposite to each other to attach the first frame film 210 and the second frame film 220 to both sides of the catalyst coating film 230 .
[0049] Combination Figure 1 The structure of the third adsorption mechanism 30 is described as follows. Figure 1 As shown, the third adsorption mechanism 30 includes an adsorption boss 32 and a suction cup body 31. The adsorption boss 32 is arranged on a side of the suction cup body 31 close to the catalyst coating film 230. The surface of the adsorption boss 32 is the adsorption surface. The area of the adsorption surface is the same as the area of the catalyst coating film 230, which facilitates the pasting and assembly of the catalyst coating film 230 and the first frame film 210.
[0050] Preferably, the second frame film 220 is a circular ring structure, and the first adsorption mechanism 10, the first frame film 210, the catalyst coated film 230, the second frame film 220, the second adsorption mechanism 20 and the third adsorption mechanism 30 are coaxially arranged to facilitate precise positioning between the first frame film 210, the catalyst coated film 230 and the second frame film 220.
[0051] Furthermore, a protective layer is provided on one side of the adsorption boss 32 close to the catalyst coating membrane 230 to achieve the effect of protecting the catalyst coating membrane 230. Preferably, the material thereof is filter paper or the like.
[0052] Optionally, the adsorption surfaces of the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30 all have a plurality of adsorption holes, and the adsorption holes are microporous structures, so that the first frame film 210, the second frame film 220 and the catalyst coating film 230 can be more evenly adsorbed on the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30. Further, the pore size of the adsorption hole is 1mm-4mm.
[0053] It should be noted that a small amount of bubbles will appear after the membrane electrode 200 is packaged in the membrane electrode packaging fixture 100. In order to solve the above problem, this embodiment uses a roller press to remove the bubbles in the membrane electrode 200. Further, the specific rolling parameters of the roller press are: rolling pressure of 20Kg-50Kg, pressure of 0.4MPa-0.8MPa, and rolling speed of 0.1m / min-2m / min.
[0054] After the membrane electrode 200 is rolled, the membrane electrode 200 may be cut for a second time according to the structure of the electrolytic cell.
[0055] For ease of understanding, combined Figure 1 The working process of the membrane electrode packaging fixture 100 is described as follows:
[0056] 1) The cut first frame film 210, the second frame film 220 and the catalyst coating film 230 are respectively adsorbed on the first adsorption mechanism 10, the second adsorption mechanism 20 and the third adsorption mechanism 30, and the release films on the first frame film 210 and the second frame film 220 are torn off;
[0057] 2) stacking the first adsorption mechanism 10 and the third adsorption mechanism 30 on the base 41, attaching the catalyst coating film 230 to the first frame film 210, turning off the negative pressure assembly connected to the third adsorption mechanism 30, removing the third adsorption mechanism 30, stacking the second adsorption mechanism 20 to the first adsorption mechanism 10, and attaching the second frame film 220 to the catalyst coating film 230;
[0058] 3) Cut the packaged membrane electrode 200 according to the structure of the electrolytic cell.
[0059] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0060] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A membrane electrode packaging fixture, characterized in that: The invention comprises a first adsorption mechanism (10), a second adsorption mechanism (20) and a third adsorption mechanism (30), wherein the first adsorption mechanism (10) is configured to adsorb a first frame film (210), the second adsorption mechanism (20) is configured to adsorb a second frame film (220), and the third adsorption mechanism (30) is configured to adsorb a catalyst coating film (230). The first frame film (210) and the second frame film (220) are arranged on both sides of the catalyst coating film (230), and an adhesive layer (2201) is arranged on one side of the first frame film (210) and the second frame film (220) facing the catalyst coating film (230) so as to bond the catalyst coating film (230), the first frame film (210) and the second frame film (220).
2. The membrane electrode packaging jig according to claim 1, characterized in that: The third adsorption mechanism (30) comprises: An adsorption boss (32) and a suction cup body (31), wherein the adsorption boss (32) is arranged on a side of the suction cup body (31) close to the catalyst coating membrane (230), and the surface of the adsorption boss (32) is an adsorption surface, and the area of the adsorption surface is the same as the area of the catalyst coating membrane (230).
3. The membrane electrode packaging jig according to claim 2, characterized in that: A protective layer is provided on a side of the adsorption boss (32) close to the catalyst coating membrane (230).
4. The membrane electrode packaging jig according to claim 1, characterized in that: The membrane electrode packaging fixture also includes: A positioning mechanism (40), wherein the positioning mechanism (40) can pass through the first adsorption mechanism (10), the first frame film (210), the second frame film (220), the second adsorption mechanism (20) and the third adsorption mechanism (30).
5. The membrane electrode packaging jig according to claim 4, characterized in that: The positioning mechanism (40) comprises: A base (41) and a positioning member (42), wherein the length of the positioning member (42) is greater than the sum of the thicknesses of any two of the first adsorption mechanism (10), the second adsorption mechanism (20) and the third adsorption mechanism (30).
6. The membrane electrode packaging jig according to claim 1, characterized in that: The adsorption surfaces of the first adsorption mechanism (10), the second adsorption mechanism (20) and the third adsorption mechanism (30) all have a plurality of adsorption holes, and the adsorption holes are microporous structures.
7. The membrane electrode packaging jig according to claim 6, characterized in that: The adsorption holes have a pore size of 1 mm to 4 mm.
8. The membrane electrode packaging jig according to claim 1, characterized in that: The second frame film (220) is a circular ring structure, and the first adsorption mechanism (10), the first frame film (210), the catalyst coating film (230), the second frame film (220), the second adsorption mechanism (20) and the third adsorption mechanism (30) are coaxially arranged.
9. The membrane electrode packaging jig according to any one of claims 1 to 8, characterized in that: The first adsorption mechanism (10) and the second adsorption mechanism (20) have the same structure and are arranged opposite to each other.
10. The membrane electrode packaging jig according to any one of claims 1 to 8, characterized in that: The adhesive layer (2201) is a pressure-sensitive adhesive or a hot-melt adhesive.