A sheet film electrode frame bonding device

Abstract

This utility model discloses a sheet membrane electrode frame bonding device in the field of fuel cell membrane electrode technology. It is characterized by comprising an upper vacuum adsorption platform and a lower vacuum adsorption screen rotatably connected. The upper vacuum adsorption platform is configured to adsorb and fix at least one layer of anode frame film during anode frame bonding and at least one layer of cathode frame film during cathode frame bonding. The lower vacuum adsorption screen is configured to adsorb and fix the release film during anode frame bonding and to adsorb and fix the CCM (catalyst coating film) bonded to the anode frame during cathode frame bonding. The CCM is a catalyst coating film. The lower vacuum adsorption screen is equipped with a lower screen roller for performing the frame bonding action. This utility model can solve the problems of adhesive residue on the frame at room temperature and air bubbles during the bonding process in traditional planar bonding, thus improving the airtightness of the membrane electrode.

Description

Technical Field

[0001] This utility model relates to a sheet membrane electrode frame bonding device, belonging to the field of fuel cell membrane electrode technology. Background Technology

[0002] The membrane electrode assembly (MEA) mainly consists of seven layers: a proton exchange membrane, anode and cathode catalyst layers, anode and cathode frames, and anode and cathode gas diffusion layers. The frames provide support for the MEA, keeping it flat and compact, ensuring the stability and consistency of the internal components. Simultaneously, the frames effectively seal and isolate the media, separating hydrogen, oxygen, and other media from each other, preventing performance degradation or safety issues caused by mixing, and ensuring the efficient conduct of electrochemical reactions. Therefore, the MEA frame plays a crucial role in fuel cells, significantly impacting the overall performance, safety, and lifespan of the fuel cell.

[0003] However, some problems arise during the membrane electrode assembly (MEA) frame bonding process. First, air bubbles can easily form between the upper and lower frame layers, affecting the sealing effect and consequently the fuel cell's performance. Second, bonding precision is low: traditional bonding equipment struggles to maintain consistent MEA bonding precision, leading to inaccurate positioning between the frame and the proton exchange membrane, thus impacting the sealing effect.

[0004] Chinese patent application CN111009668A discloses a method and apparatus for bonding membrane electrode frames. It includes transferring a lower frame membrane to a loading station; transferring a membrane electrode to the loading station and stacking it on the lower frame membrane, aligning the membrane electrode with the lower frame membrane; transferring an upper frame membrane to the loading station and stacking it on the membrane electrode, aligning the upper frame membrane with the membrane electrode; vacuum adsorption of the lower frame membrane and the side of the membrane electrode away from the upper frame membrane, and vacuum adsorption of the side of the upper frame membrane away from the upper frame membrane; and bonding the stacked lower frame membrane, membrane electrode, and upper frame membrane together. Although this patent uses vacuum adsorption for the upper and lower frames, planar hot pressing still generates some air bubbles for large-area bonding, and this bonding method is not suitable for pressure-sensitive adhesives or frames that are sticky at room temperature. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a sheet film electrode frame bonding assembly.

[0006] To solve the above-mentioned technical problems, this utility model provides a sheet film electrode frame bonding device, including an upper vacuum adsorption platform and a lower vacuum adsorption screen that are rotatably connected. The upper vacuum adsorption platform is configured to adsorb and fix at least one layer of anode frame film when the anode frame is bonded, and to adsorb and fix at least one layer of cathode frame film when the cathode frame is bonded. The lower vacuum adsorption screen is configured to adsorb and fix the release film when the anode frame is bonded, and to adsorb and fix the CCM bonded to the anode frame when the cathode frame is bonded. The CCM is a catalyst coating film. The lower vacuum adsorption screen is equipped with a lower screen roller for edge bonding.

[0007] Furthermore, both the upper vacuum adsorption platform and the lower vacuum adsorption screen are provided with frame positioning areas according to the size of the membrane electrode.

[0008] Furthermore, the anode frame film and the cathode frame film have a hollow area at their center that is the same size as the active area of ​​the membrane electrode.

[0009] Furthermore, the release film has a hollow area at its center that is the same size as the CCM, but larger than the active area of ​​the membrane electrode.

[0010] Furthermore, the outer dimensions of the anode frame film, cathode frame film, and release film are the same.

[0011] Furthermore, the upper vacuum adsorption platform is provided with several rows of vacuum holes, and each vacuum hole is equipped with a removable sealing plug.

[0012] Furthermore, the upper vacuum adsorption platform is provided with several heating rods arranged laterally or longitudinally, avoiding the vacuum holes.

[0013] Furthermore, a lower screen printing plate heating rod or heating plate is provided inside the lower screen printing plate roller.

[0014] The beneficial effects achieved by this utility model are: This invention can solve the problems of adhesive stickiness of the frame at room temperature and air bubbles in the traditional planar bonding process, thereby improving the airtightness of the membrane electrode. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sheet film electrode anode frame bonding device; Figure 2 This is a schematic diagram of the sheet film electrode anode frame bonding device; Figure 3 This is a schematic diagram of the border positioning area structure; Figure 4 This is a schematic diagram of the vacuum pore distribution structure of the upper vacuum adsorption platform; Figure 5 This is a schematic diagram of the CCM (Content Management System) with the anode frame properly attached; Figure 6 This is a schematic diagram of the sheet film electrode cathode frame bonding device; Figure 7 This is a schematic diagram of the sheet film electrode cathode frame bonding device; Figure 8 This is a schematic diagram of the CCM (Content Management System) that fits the anode and cathode edges.

[0016] In the diagram: 1. Lower vacuum adsorption screen; 11. Positioning position of the lower vacuum adsorption screen frame; 12. Heating rod of the lower screen; 2. Upper vacuum adsorption platform; 21. Vacuum hole; 22. Positioning position of the upper vacuum adsorption platform frame; 23. Heating rod of the upper platform; 3. Release film; 4. CCM; 5. Anode frame; 6. Rotating shaft; 7. Lower screen roller; 8. Cathode frame. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example 1, as Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, one embodiment of this utility model provides a sheet film electrode frame bonding device, including an upper vacuum adsorption platform 2 and a lower vacuum adsorption screen 1 that are rotatably connected by a rotating shaft 6; The upper vacuum adsorption platform 2 is configured to adsorb and fix at least one layer of anode frame film when the anode frame 5 is attached, and to adsorb and fix at least one layer of cathode frame film when the cathode frame 8 is attached. The lower vacuum adsorption screen 1 is configured to adsorb and fix the release film 3 when the anode frame 5 is bonded, and to adsorb and fix the CCM (such as) of the bonded anode frame 5 when the cathode frame 8 is bonded. Figure 5 In A), CCM (Catalyst Coated Membrane) is the catalyst coating film; The lower vacuum adsorption screen 1 is equipped with a lower screen roller 7 for performing the edge bonding action.

[0021] like Figure 2 As shown in one embodiment of the present invention, both the upper vacuum adsorption platform 2 and the lower vacuum adsorption screen 1 are provided with frame positioning areas according to the size of the membrane electrode, namely the upper vacuum adsorption platform frame positioning position 22 and the lower vacuum adsorption screen frame positioning position 11. The upper vacuum adsorption platform frame positioning position 22 and the lower vacuum adsorption screen frame positioning position 11 are provided to ensure accurate fitting of the cathode frame and the anode frame.

[0022] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown in one embodiment of this utility model, the anode frame film and cathode frame film have a hollow area in their center that is the same size as the active area of ​​the membrane electrode; the release film 3 has a hollow area in its center that is the same size as the CCM4, but larger than the active area of ​​the membrane electrode; the anode frame film, cathode frame film, and release film 3 have the same outer dimensions. The same outer dimensions of the anode frame film, cathode frame film, and release film 3 facilitate positioning, and are the same size as the areas of the upper vacuum adsorption platform frame positioning position 22 and the lower vacuum adsorption screen frame positioning position 11. The release film 3 has a hollow area in its center that is the same size as the CCM4. The release film 3 is used because it is easy to peel off from the frame, and the hollow area in the center of the release film 3, being the same size as the CCM4, can vacuum-adsorb the CCM.

[0023] like Figure 2 and Figure 3 As shown in one embodiment of the present invention, the upper vacuum adsorption platform is provided with several rows of vacuum holes 21, and a detachable sealing element is provided in the vacuum hole 21 for sealing the vacuum hole. The sealing can be done by attaching an adhesive material to the vacuum platform, or by using high-temperature tape, or by using PET, PI or PEN frame material coated with pressure-sensitive adhesive.

[0024] like Figure 3As shown in one embodiment of the present invention, the upper vacuum adsorption platform is provided with upper platform heating rods 23 arranged laterally or longitudinally to avoid the vacuum hole 11. The spacing between the upper platform heating rods is 3-6cm, which can improve the edge fitting effect.

[0025] like Figure 3 As shown in one embodiment of the present invention, a lower screen printing plate heating rod 12 or a heating plate is provided inside the lower screen printing plate roller. The lower screen printing plate heating rod 12 or the heating plate is heated so that the hot melt adhesive frame is adhered.

[0026] Example 2: A method for bonding the frame of a sheet film electrode, using pressure-sensitive adhesive, such as... Figures 1-8 As shown, the specific implementation method is as follows: 1) Frame cutting: Before the frame is attached, the anode frame 5, cathode frame 8, release film 3 and CCM4 are cut according to the drawing requirements. The center of the anode frame film 5 and the cathode frame film 8 is cut out with a hollow area of ​​the same size as the active area of ​​the membrane electrode. The hollow area cut out in the center of the release film 3 is the same size as the CCM4, but larger than the active area of ​​the membrane electrode. The outer dimensions of the anode frame, the cathode frame and the release film are the same.

[0027] 2) Positioning of the lower vacuum adsorption screen: Remove the protective film from the adhesive side of the anode frame, place it with the adhesive side facing up on the lower vacuum adsorption screen, and seal the area outside the outer edge of the frame with tape or other adhesive material, leaving only the position of the frame open. Position the frame of the lower vacuum adsorption screen accordingly.

[0028] 3) Positioning the Upper Vacuum Adsorption Platform: Seal the vacuum holes of the upper vacuum adsorption platform, start the bonding device, and flip the upper vacuum adsorption platform onto the lower vacuum adsorption screen for bonding. Flip the upper vacuum adsorption platform open; the anode frame should now be attached to it. Position the anode frame of the upper vacuum adsorption platform, leaving the vacuum holes under the anode frame exposed, and seal the remaining vacuum holes. The bonding position of the upper vacuum adsorption platform is now complete.

[0029] 4) Anode frame bonding: Place the release film 3 at the position of the lower vacuum adsorption screen 1, place the CCM4 on the hollow area in the center of the release film, and perform vacuum adsorption; remove the protective film from the adhesive side of the anode frame 5, place it with the adhesive side facing up at the position of the upper vacuum adsorption platform 2, and perform vacuum adsorption.

[0030] 5) Start the bonding device. The upper vacuum adsorption platform 2 flips onto the lower vacuum adsorption screen 1. The release film, CCM and anode frame are bonded by the roller 7 under the lower vacuum adsorption screen. The pressure of the roller can be adjusted.

[0031] 6) Cathode Frame Bonding: After the anode frame bonding is completed, remove the release film 3. Place the CCM(A) with the anode frame adhesive side up on the lower vacuum adsorption screen and perform vacuum adsorption. Remove the protective film from the adhesive side of the cathode frame 8, place it adhesive side up at the position positioned on the upper vacuum adsorption platform 2, and perform vacuum adsorption. 7) Start the bonding device. The upper vacuum adsorption platform 2 flips onto the lower vacuum adsorption screen 1. The cathode frame 8 and the CCM (A) with the anode frame are bonded together by the roller 7 under the lower vacuum adsorption screen. The pressure of the roller can be adjusted.

[0032] 8) Open the upper vacuum adsorption platform; the CCM frame is now properly attached.

[0033] Example 3: This example provides a method for bonding the edge of a sheet electrode, using a hot melt adhesive with initial tack. The specific implementation is as follows: 1) The border trimming is the same as in Example 2.

[0034] 2) The positioning of the vacuum adsorption screen is the same as in Example 2.

[0035] 3) The positioning of the upper vacuum adsorption platform is the same as in Example 2.

[0036] 4) Heating of the bonding device: The upper vacuum adsorption platform is equipped with a heating device, and the heating temperature is set to 50-55℃. The rollers under the lower vacuum adsorption screen are heated to 50-80℃.

[0037] 5) Anodized frame bonding, as in Example 2.

[0038] 6) Cathode frame bonding, same as in Example 2.

[0039] 7) After the anode and cathode frames are rolled together, they are placed in a flatbed hot press for heating and pressurization and kept warm and pressurized for a certain period of time to ensure that the anode frame, the frame and the CCM are completely bonded together.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sheet membrane electrode border fitting device characterized by, It includes an upper vacuum adsorption platform (2) and a lower vacuum adsorption screen (1) that are rotatably connected. The upper vacuum adsorption platform (2) is configured to adsorb and fix at least one layer of anode frame film when the anode frame (5) is attached, and to adsorb and fix at least one layer of cathode frame film when the cathode frame (8) is attached. The lower vacuum adsorption screen (1) is configured to adsorb and fix the release film when the anode frame (5) is attached, and to adsorb and fix the CCM of the attached anode frame (5) when the cathode frame (8) is attached. The CCM is a catalyst coating film. The lower vacuum adsorption screen (1) is equipped with a lower screen roller (7) for performing the edge bonding action.

2. The sheet-membrane-electrode-frame lamination device according to claim 1, wherein Both the upper vacuum adsorption platform (2) and the lower vacuum adsorption screen (1) are provided with a frame positioning area according to the size of the membrane electrode.

3. The sheet-membrane-electrode-frame lamination device according to claim 1, wherein The anode frame membrane and cathode frame membrane have a hollow area at their center that is the same size as the active area of ​​the membrane electrode.

4. The sheet-membrane-electrode-frame lamination device according to claim 1, wherein The release film has a hollow area at its center that is the same size as the CCM but larger than the active area of ​​the membrane electrode.

5. The sheet-membrane-electrode-frame lamination device according to claim 1, wherein The anode frame film, cathode frame film, and release film have the same external dimensions.

6. The sheet-membrane-electrode-frame lamination device according to claim 1, wherein The upper vacuum adsorption platform (2) has several rows of vacuum holes (21) distributed in it, and the vacuum holes (21) are provided with detachable seals.

7. The sheet-to-membrane electrode borderfitting device according to claim 6, wherein The upper vacuum adsorption platform (2) is provided with several heating rods (23) arranged in a horizontal or vertical manner, avoiding the vacuum hole (21).

8. The sheet-to-membrane electrode borderfitting device according to claim 1, characterized by The lower screen printing roller (7) is equipped with a lower screen printing heating rod or heating plate inside.

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