Membrane electrode preparation device
By introducing a cleaning and drying mechanism into the membrane electrode preparation device, the problem of difficulty in reusing the base membrane is solved, the reuse of the electrode catalyst layer base membrane is achieved, the preparation cost of the membrane electrode is reduced and the production efficiency is improved.
Patent Information
- Application Number
- CN202422506872.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-16
AI Technical Summary
In the existing transfer method for preparing membrane electrode equipment, the base membrane is difficult to reuse, resulting in increased membrane electrode processing costs.
A membrane electrode preparation device is designed, which includes a hot pressing component, a cleaning mechanism, a drying mechanism and multiple receiving rollers. The cleaning mechanism is used to clean and recover the electrode catalyst layer base membrane, which is reused by the drying mechanism, and the cleaning liquid is recycled by the conveying mechanism to reduce the preparation cost.
The reuse of the substrate membrane of the electrode catalyst layer is achieved, the preparation cost of the membrane electrode is reduced, and the production efficiency and the degree of automation of the equipment are improved.
Smart Images
Figure CN223427510U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of membrane electrode processing, in particular to a membrane electrode preparation device. Background Art
[0002] The membrane electrode (MEA) is the core component of a proton exchange membrane fuel cell (PEMFC). It consists of a proton exchange membrane (PEM), anode and cathode catalyst layers, and cathode and cathode gas diffusion layers (GDLs). The cathode and cathode catalyst layers, along with the PEM, form the catalyst coating membrane (CCM), which is directly related to the electrochemical catalytic performance of the MEA.
[0003] CCM preparation processes include direct coating and transfer printing. Although the direct coating method does not require a substrate membrane, since the catalyst slurry is directly applied to the surface of the proton exchange membrane, the solvent in the slurry causes the proton exchange membrane to swell, requiring the development of a special coating process. Compared with the transfer printing method, the direct coating method is more difficult and has higher development costs.
[0004] The transfer method requires a base membrane. This method involves coating the catalyst slurry onto the surface of a base membrane and then transferring it to both sides of the proton exchange membrane by hot pressing. This method increases the cost compared to the direct coating method due to the use of a base membrane, but this method is easy to use, has low development costs, and has strong equipment adaptability, without the need to add additional functions.
[0005] The transfer printing method is generally used to prepare CCMs due to its low process difficulty and good equipment compatibility. However, since a portion of the catalytic layer remains on the surface of the substrate membrane after transfer, it is generally used once, which increases the cost of the substrate membrane.
[0006] However, with the development of fuel cell technology, while pursuing performance and durability, people have increasingly higher requirements for cost. In existing transfer printing production equipment, there is a problem that the base membrane is difficult to reuse, which will lead to an increase in the processing cost of the membrane electrode. Utility Model Content
[0007] In view of this, the present invention aims to provide a membrane electrode manufacturing device to help reduce the processing cost of the membrane electrode.
[0008] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:
[0009] A membrane electrode preparation device comprises a frame, a hot pressing assembly arranged on the frame, a first unwinding roller, a first receiving roller, a second unwinding roller, a second receiving roller, a third receiving roller and a cleaning mechanism;
[0010] The hot pressing assembly includes at least one pair of hot pressing rollers;
[0011] The first unwinding roller is used for unwinding a proton exchange membrane protective film assembly, the first winding roller is used for winding the proton exchange membrane protective film in the proton exchange membrane protective film assembly, the second unwinding roller is used for unwinding an electrode catalyst layer substrate film assembly, the second winding roller is used for winding the proton exchange membrane in the proton exchange membrane protective film assembly and the electrode catalyst layer in the electrode catalyst layer substrate film assembly which are hot-pressed together by the at least one pair of hot-pressing rollers, and the third winding roller is used for winding the electrode catalyst layer substrate film in the electrode catalyst layer substrate film assembly.
[0012] The cleaning mechanism is arranged between the hot-pressing assembly and the third winding roller along a conveying path of the electrode catalyst layer substrate film and is used for cleaning the electrode catalyst layer substrate film before winding.
[0013] Further, the second unwinding roller and the third winding roller are both two.
[0014] The two second unwinding rollers are arranged on two sides of the first winding roller, and the two third winding rollers are arranged on two sides of the second winding roller.
[0015] Further, the cleaning mechanism comprises a housing and a liquid suction part arranged at a lower part of the housing.
[0016] A liquid supply part for supplying cleaning liquid to the liquid suction part is arranged in the housing, the lower part of the liquid suction part protrudes out of the housing, and the cleaning mechanism abuts against the electrode catalyst layer substrate film through the liquid suction part.
[0017] Further, a recovery mechanism is arranged below the cleaning mechanism, and the recovery mechanism is used for recovering the cleaning liquid falling from the liquid suction part.
[0018] Further, a conveying mechanism and a filter part arranged at an outlet of the recovery mechanism are further included, the conveying mechanism is located between the recovery mechanism and the liquid supply part, and the conveying mechanism is used for conveying the cleaning liquid recovered by the recovery mechanism into the liquid supply part.
[0019] Further, a drying mechanism is further included.
[0020] The drying mechanism is arranged downstream of the cleaning mechanism along the conveying path of the electrode catalyst layer substrate film, and the drying mechanism is used for drying the cleaned electrode catalyst layer substrate film.
[0021] Further, the cleaning mechanism and the drying mechanism are arranged adjacently.
[0022] Furthermore, it also includes a third unwinding roller, which is used to unwind the catalyst coating proton membrane protective membrane. The catalyst coating proton membrane protective membrane is rolled up on the second unwinding roller together with the proton exchange membrane and the electrode catalyst layer that are hot-pressed together.
[0023] Furthermore, it also includes a fourth unwinding roller and a fourth receiving roller;
[0024] The fourth unwinding roller is used to unwind the outer hot-pressed protective film, and the fourth winding roller is used to wind up the outer hot-pressed protective film. The outer hot-pressed protective film is located on the outside of the proton exchange membrane and the electrode catalyst layer base membrane assembly, and passes through the at least one pair of hot-pressed rollers together with the proton exchange membrane and the electrode catalyst layer base membrane assembly.
[0025] Furthermore, there are two of the fourth unwinding roller and the fourth receiving roller, the two fourth unwinding rollers are respectively placed on both sides of the first unwinding roller, and the two fourth receiving rollers are respectively placed on both sides of the second receiving roller.
[0026] Compared with the prior art, the present invention has the following advantages:
[0027] The membrane electrode preparation device described in the present invention has a simple structure. By adding a cleaning mechanism and a third material collection roller, the electrode catalyst layer base membrane can be cleaned and recovered during the membrane electrode preparation process, so that the electrode catalyst layer base membrane can be reused, which is beneficial to reducing the preparation cost of the membrane electrode.
[0028] Furthermore, the provision of two second unwinding rollers and two third winding rollers facilitates simultaneous transfer of the electrode catalyst layer onto both sides of the proton exchange membrane. The cleaning mechanism, comprising a housing, a liquid suction unit, and a liquid supply unit, facilitates the cleansing of the electrode catalyst layer substrate membrane, facilitating direct reuse of the wound electrode catalyst layer substrate membrane.
[0029] In addition, a recovery mechanism is provided to recycle the cleaning liquid, facilitating its reuse and further reducing the cost of membrane electrode production. A filtration unit and a delivery mechanism are provided. The filtration unit filters the cleaning liquid, while the delivery mechanism delivers the filtered cleaning liquid directly to the liquid supply unit, facilitating its direct reuse. The high degree of automation allows the filter unit to be cleaned or replaced regularly during use, making it simple and convenient to use.
[0030] Furthermore, a drying mechanism is provided to dry the cleaned electrode catalyst layer base membrane, allowing the rolled electrode catalyst layer base membrane to be directly reused, making it convenient to use. A third unwinding roller is provided to better protect the rolled proton exchange membrane and electrode catalyst layer, thereby conveniently protecting the rolled catalyst-coated proton membrane.
[0031] The provision of the fourth unwinding roller and the fourth receiving roller can better protect the proton exchange membrane and the electrode catalyst layer during the CCM processing, thereby improving the quality of the prepared CCM roll. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:
[0033] Figure 1 This is a schematic structural diagram of the membrane electrode preparation device described in an embodiment of the present utility model.
[0034] Description of reference numerals:
[0035] 1. Hot pressing assembly; 2. First unwinding roller; 3. First receiving roller; 4. Second unwinding roller; 5. Second receiving roller; 6. Third receiving roller; 7. Third unwinding roller; 8. Fourth unwinding roller; 9. Fourth receiving roller; 10. Cleaning mechanism; 11. Drying mechanism; 12. Recovering mechanism; 13. Conveying mechanism; 14. Guide roller;
[0036] 101. Hot pressing roller;
[0037] 1001, housing; 1002, liquid suction unit; 1003, liquid supply unit;
[0038] 1201. Filtration unit. DETAILED DESCRIPTION
[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.
[0040] In the description of this utility model, it should be noted that the orientations or positional relationships shown in the accompanying drawings are solely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0041] Additionally, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.
[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0043] This embodiment relates to a membrane electrode preparation device, which is mainly used to prepare CCM during the membrane electrode processing process. When processing CCM, the membrane electrode preparation device can clean and recycle the electrode catalyst layer base membrane, which is beneficial to reducing the preparation cost of CCM.
[0044] Based on the above design concept, an exemplary structure of the membrane electrode preparation device of this embodiment is as follows: Figure 1 As shown, in terms of overall structure, the membrane electrode preparation device of this embodiment mainly includes a frame, a hot pressing component 1 arranged on the frame, a first unloading roller 2, a first receiving roller 3, a second unloading roller 4, a second receiving roller 5, a third receiving roller 6 and a cleaning mechanism 10.
[0045] The frame is the installation base for the other components and is made of sheet metal, profiles, etc., which is convenient for arranging the other components. The hot pressing assembly 1 includes at least one pair of hot pressing rollers 101. Specifically, there are two hot pressing rollers 101, both of which are rotatably mounted on the frame. The axes of the two hot pressing rollers 101 are parallel, so that a certain gap is provided between the two hot pressing rollers 101. The specific structure of the hot pressing rollers 101 can refer to the existing structure.
[0046] In order to facilitate understanding of the membrane electrode preparation device of this embodiment, it is first necessary to explain that the axes of the above-mentioned hot pressing roller 101, the first unloading roller 2, the first receiving roller 3, the second unloading roller 4, the second receiving roller 5, the third receiving roller 6, the third unloading roller 7, the fourth unloading roller 8, the fourth receiving roller 9 and each guide roller 14 are all arranged in parallel, and the first unloading roller 2, the first receiving roller 3, the second unloading roller 4, the second receiving roller 5, the third receiving roller 6, the third unloading roller 7, the fourth unloading roller 8 and the fourth receiving roller 9 are all rotatably arranged on the frame.
[0047] The first unwinding roller 2 is used to unwind the proton exchange membrane protective membrane assembly. The proton exchange membrane protective membrane assembly includes a proton exchange membrane and a proton exchange membrane protective membrane adhered to one side of the proton exchange membrane. The proton exchange membrane protective membrane assembly is rolled into a roll and unwound by the first unwinding roller 2. Preferably, the first unwinding roller 3 and the first unwinding roller 2 are located on the same side of the hot pressing assembly 1. The first unwinding roller 3 is used to unwind the proton exchange membrane protective membrane in the proton exchange membrane protective membrane assembly.
[0048] The second unloading roller 4 is used to unwind the electrode catalyst layer base membrane assembly, which includes an electrode catalyst layer and an electrode catalyst layer base membrane assembly arranged on one side of the electrode catalyst layer. The electrode catalyst layer base membrane assembly is wound onto the second unloading roller 4 and unloaded by the second unloading roller 4.
[0049] It should be noted that the electrode catalyst layer herein includes a cathode catalyst layer and an anode catalyst layer. For example, in this embodiment, one of the two second unwinding rollers 4 is used to place the anode catalyst layer substrate membrane assembly, and the other of the two second unwinding rollers 4 is used to place the cathode catalyst layer substrate membrane assembly. The electrode catalyst layer substrate membrane is generally made of PTFE (polytetrafluoroethylene) or ePTFE (expanded polytetrafluoroethylene).
[0050] The proton exchange membrane and the electrode catalyst layer base membrane assembly in the proton exchange membrane protective membrane assembly pass through the gap between the two hot pressing rollers 101 together. After being hot-pressed by the two hot pressing rollers 101, the second receiving roller 5 is used to wind up the proton exchange membrane and the electrode catalyst layer in the electrode catalyst layer base membrane assembly that are hot-pressed together by at least one pair of hot pressing rollers 101, and the third receiving roller 6 is used to wind up the electrode catalyst layer base membrane in the electrode catalyst layer base membrane assembly.
[0051] During hot pressing, the hot pressing temperature is set to 120° C.-140° C., for example, 130° C., and the pressure is preferably 9 KN-11 KN, for example, 10 KN, which can better ensure the processing quality of CCM.
[0052] In order to facilitate the reuse of the electrode catalyst layer base membrane, in this embodiment, the cleaning mechanism 10 is arranged between the hot pressing assembly 1 and the third receiving roller 6 along the conveying path of the electrode catalyst layer base membrane, and the cleaning mechanism 10 is used to clean the electrode catalyst layer base membrane before winding, which is beneficial to reducing the processing cost of CCM.
[0053] As a preferred embodiment, there are two second unloading rollers 4 and two third receiving rollers 6, the two second unloading rollers 4 are placed on both sides of the first receiving roller 3, and the two third receiving rollers 6 are placed on both sides of the second receiving roller 5, so that the proton exchange membrane hot-pressed by the hot pressing assembly 1 is provided with an electrode catalyst layer on both sides.
[0054] As in this embodiment, after the electrode catalyst layer base membrane assembly and the proton exchange membrane pass through the hot pressing assembly 1 together, the electrode catalyst layer in the electrode catalyst layer base membrane assembly will be transferred to the proton exchange membrane. Specifically, the cathode catalyst layer and the anode catalyst layer are printed on both sides of the proton exchange membrane to form a CCM. The CCM is rolled up on the second receiving roller 5 to facilitate the preparation of the final membrane electrode.
[0055] In the above structure, two second unwinding rollers 4 and two third receiving rollers 6 are provided, which can conveniently transfer the electrode catalyst layer on both sides of the proton exchange membrane at the same time, resulting in high production efficiency and helping to reduce CCM processing costs.
[0056] As a preferred embodiment, the cleaning mechanism 10 in this embodiment includes a housing 1001 and a liquid suction portion 1002 provided at the lower portion of the housing 1001 . The housing 1001 is provided with a liquid supply portion 1003 for supplying cleaning liquid to the liquid suction portion 1002 .
[0057] The liquid absorption portion 1002 can be specifically a conventional sponge, the width of which is the same as the width of the electrode catalyst layer substrate membrane. The cleaning liquid can be, for example, a mixed solution of ethanol and water. The liquid supply portion 1003 can be specifically a container containing the mixed solution. The liquid absorption portion 1002 and the liquid supply portion 1003 can be connected by a pipeline. An outlet is provided below the liquid supply portion 1003. A valve can be installed at the outlet or on the pipeline connecting the liquid absorption portion 1002 and the liquid supply portion 1003 to facilitate control of the outflow rate of the cleaning liquid. For example, by adjusting the cleaning liquid to a suitable flow rate, the sponge can be kept moist without dripping the solution.
[0058] Specifically, the lower portion of the liquid suction portion 1002 protrudes from the housing 1001, and the cleaning mechanism 10 contacts the electrode catalyst layer substrate membrane via the liquid suction portion 1002. Specifically, the liquid suction portion 1002 contacts the side of the electrode catalyst layer substrate membrane where the electrode catalyst layer was originally provided. This allows the electrode catalyst layer substrate membrane to be cleaned during the process of being transported to the reel, achieving high cleaning efficiency.
[0059] It should be understood that in the above structure, the cleaning mechanism 10 is configured to include a shell 1001, a liquid suction part 1002 and a liquid supply part 1003, etc., which can conveniently clean the electrode catalyst layer base membrane, and the cleaning is relatively clean, which is conducive to the direct reuse of the electrode catalyst layer base membrane after winding.
[0060] To facilitate recycling of the cleaning liquid, a preferred embodiment includes a recovery mechanism 12 below the cleaning mechanism 10. This mechanism is used to recover cleaning liquid that has fallen from the liquid absorbing section 1002. Specifically, the recovery mechanism 12 is a container having an internal cavity and an upper opening. The presence of the recovery mechanism 12 allows for the recovery of the cleaning liquid, facilitating its reuse and further reducing the cost of membrane electrode production.
[0061] In order to further improve the degree of automation, as a preferred implementation, the membrane electrode preparation apparatus of this embodiment further includes a conveying mechanism 13 and a filtering unit 1201 provided at the outlet of the recovery mechanism 12 .
[0062] In terms of specific structure, the conveying mechanism 13 is located between the recovery mechanism 12 and the liquid supply part 1003. The two interfaces of the conveying mechanism 13 are respectively connected to the outlet of the recovery mechanism 12 and the inlet of the liquid supply part 1003. The outlet of the recovery mechanism 12 is preferably arranged at the lower part of the recovery mechanism 12, and the inlet of the liquid supply part 1003 is preferably arranged at the upper part of the liquid supply part 1003. The conveying mechanism 13 is used to convey the cleaning liquid recovered by the recovery mechanism 12 to the liquid supply part 1003. The conveying mechanism 13 can be, for example, an existing hydraulic pump, and the filter part 1201 can be, for example, an existing filter cotton.
[0063] As shown in the above structure, a filter part 1201 and a conveying mechanism 13 are provided. The filter part 1201 can filter the cleaning liquid, and the conveying mechanism 13 can directly convey the filtered cleaning liquid to the liquid supply part 1003, which is conducive to the direct reuse of the cleaning liquid. The degree of automation is high. The filter part 1201 only needs to be cleaned or replaced regularly during the use of the equipment. It is simple and convenient to use.
[0064] It should be understood that to ensure effective cleaning, the number of cleaning mechanisms 10 can be set to multiple, for example, two or three, depending on the cleaning effect. When there are multiple cleaning mechanisms 10, the multiple cleaning mechanisms 10 can be arranged in sequence and at intervals along the transport path of the electrode catalyst layer substrate membrane. In addition, the length of the liquid suction portion 1002 can be extended to increase the contact area with the electrode catalyst layer substrate membrane to improve the cleaning effect.
[0065] To further enhance ease of use, the membrane electrode preparation apparatus of this embodiment also includes a drying mechanism 11, as a preferred embodiment, so that the recovered electrode catalyst layer substrate membrane can be directly used. Specifically, the drying mechanism 11 is disposed downstream of the cleaning mechanism 10 along the transport path of the electrode catalyst layer substrate membrane, and is used to dry the cleaned electrode catalyst layer substrate membrane.
[0066] It should be noted that the drying mechanism 11 can be, for example, an existing hot air mechanism that blows out hot air. Preferably, the hot air outlet is located directly above or obliquely above the electrode catalyst layer substrate membrane to improve drying efficiency. It should be understood that the drying mechanism 11 can be an electric heating mechanism, such as a heating wire, which heats the air surrounding the electrode catalyst layer substrate membrane and heats and dries the electrode catalyst layer substrate membrane with the hot air.
[0067] It should be understood that the drying mechanism 11 provided in this embodiment can dry the cleaned electrode catalyst layer substrate membrane, allowing the rolled electrode catalyst layer substrate membrane to be directly reused, which is convenient for use. Preferably, the cleaning mechanism 10 and the drying mechanism 11 are arranged adjacent to each other, allowing the cleaned electrode catalyst layer substrate membrane to be directly dried, making the overall structure compact and convenient for overall layout.
[0068] As a preferred embodiment, the membrane electrode preparation apparatus of this embodiment further includes a third unwinding roller 7, which is used to unwind the catalyst-coated proton membrane protective membrane. The catalyst-coated proton membrane protective membrane is preferably made of PET (polyethylene terephthalate). The catalyst-coated proton membrane protective membrane is wound together with the hot-pressed proton exchange membrane and electrode catalyst layer on the second winding roller 5. In this embodiment, the catalyst-coated proton membrane protective membrane is specifically a CCM protective membrane. The provision of the third unwinding roller 7 can better protect the wound proton exchange membrane and electrode catalyst layer. In this embodiment, it can specifically protect the finally wound CCM.
[0069] In order to improve the processing quality of CCM, as a preferred embodiment, the membrane electrode preparation device of this embodiment also includes a fourth unloading roller 8 and a fourth receiving roller 9, wherein the fourth unloading roller 8 is used to unwind the outer hot-pressed protective membrane, and the outer hot-pressed protective membrane is located on the outside of the proton exchange membrane and the electrode catalyst layer base membrane assembly, and passes through at least a pair of hot-pressing rollers 101 together with the proton exchange membrane and the electrode catalyst layer base membrane assembly.
[0070] Specifically in this embodiment, since the electrode catalyst layer base membrane assembly includes a cathode catalyst layer base membrane assembly and an anode catalyst layer base membrane assembly, in this embodiment, there are two outer hot-pressed protective membranes, and the two outer hot-pressed protective membranes are respectively located on the outside of the electrode catalyst layer base membrane assembly on both sides, that is, located on the outside of the cathode catalyst layer base membrane assembly and the anode catalyst layer base membrane assembly, and the two outer hot-pressed protective membranes are hot-pressed together with the proton exchange membrane and the electrode catalyst layer base membrane assembly through two hot-pressing rollers 101, and the fourth receiving roller 9 is used to wind up the outer hot-pressed protective membrane.
[0071] It should be noted that the outer hot-pressed protective film is preferably made of silicone material, and a fourth unwinding roller 8 and a fourth receiving roller 9 are provided. During the CCM processing, the proton exchange membrane and the electrode catalyst layer can be better protected, which is beneficial to improving the quality of the prepared CCM roll.
[0072] In order to further improve the processing quality of CCM, as a preferred embodiment, there are two fourth unloading rollers 8 and two fourth receiving rollers 9, and the two fourth unloading rollers 8 are placed on both sides of the first unloading roller 2, and the two fourth receiving rollers 9 are placed on both sides of the second receiving roller 5, so that the proton exchange membrane and the electrode catalyst layer base membrane assembly hot-pressed by the hot pressing assembly 1 are provided with an outer hot pressing protective film on both sides, which is beneficial to improving the quality of the prepared CCM.
[0073] Finally, it should be noted that the membrane electrode preparation device of this embodiment further includes a plurality of guide rollers 14, which are still referred to Figure 1As shown, for example, a guide roller 14 is provided between the first unloading roller 2 and the hot pressing assembly 1, a guide roller 14 is provided between the hot pressing assembly 1 and the second receiving roller 5, three guide rollers 14 are provided between the fourth unloading roller 8 and the hot pressing assembly 1, and two or four guide rollers 14 are provided between the hot pressing assembly 1 and the third receiving roller 6.
[0074] It should be noted that each guide roller 14 is preferably rotatably mounted on the frame, but may also be fixedly mounted on the frame as required. The number and position of each guide roller 14 may be adjusted and arranged according to actual needs, and are not specifically limited in this embodiment.
[0075] The membrane electrode fabrication apparatus of this embodiment has a simple structure. By adding a cleaning mechanism 10 and a third take-up roller 6, the electrode catalyst layer substrate membrane can be cleaned and recovered during the membrane electrode fabrication process, making the electrode catalyst layer substrate membrane reusable, thereby reducing the cost of membrane electrode fabrication. If the electrode catalyst layer substrate membrane is reused 10 times, the cost of the substrate membrane per roll of CCM can be reduced to one-tenth of the original cost.
[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A membrane electrode preparation device, characterized in that: It comprises a frame, a hot pressing assembly (1) arranged on the frame, a first unwinding roller (2), a first receiving roller (3), a second unwinding roller (4), a second receiving roller (5), a third receiving roller (6) and a cleaning mechanism (10); The hot pressing assembly (1) comprises at least one pair of hot pressing rollers (101); The first unwinding roller (2) is used for unwinding the proton exchange membrane protective membrane assembly, the first receiving roller (3) is used for receiving the proton exchange membrane protective membrane in the proton exchange membrane protective membrane assembly, the second unwinding roller (4) is used for unwinding the electrode catalyst layer base membrane assembly, the second receiving roller (5) is used for receiving the proton exchange membrane in the proton exchange membrane protective membrane assembly and the electrode catalyst layer in the electrode catalyst layer base membrane assembly that are heat-pressed together by the at least one pair of hot pressing rollers (101), and the third receiving roller (6) is used for receiving the electrode catalyst layer base membrane in the electrode catalyst layer base membrane assembly; The cleaning mechanism (10) is arranged between the hot pressing assembly (1) and the third receiving roller (6) along the conveying path of the electrode catalyst layer base membrane, and the cleaning mechanism (10) is used to clean the electrode catalyst layer base membrane before winding.
2. The membrane electrode preparation device according to claim 1, characterized in that: There are two of each of the second unwinding roller (4) and the third receiving roller (6); The two second unwinding rollers (4) are respectively placed on both sides of the first receiving roller (3), and the two third receiving rollers (6) are respectively placed on both sides of the second receiving roller (5).
3. The membrane electrode manufacturing device according to claim 1, characterized in that: The cleaning mechanism (10) comprises a shell (1001) and a liquid absorbing portion (1002) provided at the lower portion of the shell (1001); A liquid supply portion (1003) for supplying cleaning liquid to the liquid suction portion (1002) is provided in the shell (1001), the lower portion of the liquid suction portion (1002) protrudes from the shell (1001), and the cleaning mechanism (10) abuts against the electrode catalyst layer base membrane through the liquid suction portion (1002).
4. The membrane electrode manufacturing device according to claim 3, characterized in that: A recovery mechanism (12) is provided below the cleaning mechanism (10), and the recovery mechanism (12) is used to recover the cleaning liquid dropped from the liquid absorbing part (1002).
5. The membrane electrode manufacturing device according to claim 4, characterized in that: It also includes a conveying mechanism (13) and a filtering unit (1201) provided at the outlet of the recovery mechanism (12); The conveying mechanism (13) is located between the recovery mechanism (12) and the liquid supply part (1003), and the conveying mechanism (13) is used to convey the cleaning liquid recovered by the recovery mechanism (12) into the liquid supply part (1003).
6. The membrane electrode manufacturing device according to claim 3, characterized in that: Also includes a drying mechanism (11); The drying mechanism (11) is arranged downstream of the cleaning mechanism (10) along the conveying path of the electrode catalyst layer substrate membrane, and the drying mechanism (11) is used to dry the cleaned electrode catalyst layer substrate membrane.
7. The membrane electrode manufacturing device according to claim 6, characterized in that: The cleaning mechanism (10) and the drying mechanism (11) are arranged adjacent to each other.
8. The membrane electrode manufacturing device according to any one of claims 1 to 7, characterized in that: The invention also comprises a third unwinding roller (7), which is used for unwinding the catalyst coating proton membrane protection membrane, and the catalyst coating proton membrane protection membrane is rolled up on the second unwinding roller (5) together with the proton exchange membrane and the electrode catalyst layer that are hot-pressed together.
9. The membrane electrode manufacturing device according to claim 8, characterized in that: It also includes a fourth unwinding roller (8) and a fourth receiving roller (9); The fourth unwinding roller (8) is used to unwind the outer hot-pressed protective film, and the fourth receiving roller (9) is used to receive the outer hot-pressed protective film. The outer hot-pressed protective film is located outside the proton exchange membrane and the electrode catalyst layer base membrane assembly, and passes through the at least one pair of hot-pressed rollers (101) together with the proton exchange membrane and the electrode catalyst layer base membrane assembly.
10. The membrane electrode manufacturing device according to claim 9, characterized in that: There are two of each of the fourth unwinding roller (8) and the fourth receiving roller (9); The two fourth unwinding rollers (8) are respectively placed on both sides of the first unwinding roller (2), and the two fourth receiving rollers (9) are respectively placed on both sides of the second receiving roller (5).