MEA cutting mechanism

Abstract

The utility model provides an MEA cutting mechanism. The MEA cutting mechanism comprises a cutting punch press, a cutting conveying mechanism and a protective film conveying mechanism, the cutting punch press comprises a lower plate and an upper plate which moves up and down relative to the lower plate to execute cutting action, and the cutting conveying mechanism is arranged on the upper surface of the lower plate and sequentially forms a feeding station, a cutting station and a discharging station. The cutting and conveying mechanism is provided with a cutting die which moves back and forth among the stations; the cutting die is located below the upper plate when walking to the cutting station. The protective film conveying mechanism is arranged on the side of the cutting punch press and adjacent to the cutting station, and the protective film conveying mechanism conveys the protective film to the position between an upper plate and a cutting die in a protective film winding and unwinding mode. The MEA cutting machine is additionally provided with the protective film conveying mechanism, so that the MEA is covered by a protective film when being cut, effective isolation is formed, contact pollution is avoided, the cleanliness of materials is ensured, the durability of the MEA is improved, and the service life of the MEA is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to an MEA cutting mechanism. Background Technology

[0002] The membrane electrode assembly (MEA), also known as a membrane electrode, is widely used in lithium-ion and hydrogen fuel cell industries and is a key component in fuel cell power generation. The MEA and its two bipolar plates form the basic unit of a fuel cell, namely a single fuel cell. The manufacturing process of a semi-finished MEA is as follows: Figure 1 As shown, a proton exchange membrane is provided, with catalyst layers on both sides of the proton exchange membrane to form 3CCM10. The 3CCM10 is fixed on both sides by a frame membrane 20 to form 5CCM. A carbon paper 40 (diffusion layer) is added to each side of the 5CCM to form a MEA semi-finished product. Finally, hydrogen, oxygen, water, and other pores 201 are cut into the frame membrane 20 by a cutting process.

[0003] In existing methods, MEA is placed directly on a die during cutting, and the holes 201 are punched out by pressing down on the upper plate of the cutting press. This method makes it difficult to ensure the cleanliness of the material. If the MEA semi-finished product is contaminated during cutting, it will affect its durability and reduce its service life.

[0004] The membrane electrode assembly (MEA) is a core component of hydrogen fuel cells. The manufacturing process and product quality of the MEA determine the upper limit of the stack's performance, lifespan, and cost. High-performance, low-cost, and long-life MEAs are of great significance for accelerating the commercialization of hydrogen fuel cells. Utility Model Content

[0005] The purpose of this invention is to provide a MEA cutting mechanism that solves the problem of contamination during MEA cutting and can extend its durability and lifespan.

[0006] The technical solution of this utility model is: an MEA cutting mechanism, including a cutting punch, a cutting conveying mechanism, and a protective film conveying mechanism. The cutting punch includes a lower plate and an upper plate that moves up and down relative to the lower plate to perform cutting actions. The cutting conveying mechanism is disposed on the upper surface of the lower plate and has a loading station, a cutting station, and an unloading station formed sequentially. The cutting conveying mechanism is provided with a die that travels back and forth between the above-mentioned stations. When the die travels to the cutting station, it is located below the upper plate.

[0007] The protective film conveying mechanism is located beside the cutting punch and adjacent to the cutting station. The protective film conveying mechanism conveys the protective film between the upper plate and the die by taking in and releasing the protective film.

[0008] In the above solution, a protective film conveying mechanism is added so that the MEA is covered with a protective film during cutting, forming an effective isolation, avoiding contact contamination, ensuring the cleanliness of the material, improving the durability of the MEA and extending its service life.

[0009] Preferably, the protective film conveying mechanism includes a vertical plate connected to the side of the cutting punch and a feeding roller, a receiving roller, a first rotating column, a second rotating column, a first feeding mechanism, and a second feeding mechanism rotatably mounted on the vertical plate.

[0010] The protective film is sequentially connected to the feeding roller, the first rotating column, the first feeding mechanism, the second feeding mechanism, the second rotating column, and the receiving roller. The protective film between the first feeding mechanism and the second feeding mechanism is located between the upper plate and the die.

[0011] Preferably, the first rotating column is located below the feeding roller, the second rotating column is located below the receiving roller, the first spreading mechanism is located outside the first rotating column, and the second spreading mechanism is located outside the second rotating column.

[0012] Preferably, the feeding roller, the first rotating column, and the first spreading mechanism are located on one side of the upright plate, and the receiving roller, the second rotating column, and the second spreading mechanism are located on the other side of the upright plate. The feeding roller, the first rotating column, and the first spreading mechanism on one side are symmetrically arranged with the receiving roller, the second rotating column, and the second spreading mechanism on the other side.

[0013] Preferably, both the first and second fabric-making mechanisms include a connecting plate, a third rotating column, and a drive source. The connecting plate is slidably connected to the upright plate in a vertical direction. The connecting plate is provided with at least one third rotating column. The drive source is connected to the connecting plate, and the protective film rotates around the third rotating column.

[0014] Preferably, the second rotating column is equipped with a meter counter.

[0015] Preferably, the cutting and conveying mechanism includes a drive mechanism and a frame connected to the lower plate. The frame sequentially forms the loading station, the cutting station, and the unloading station. The die is slidably connected to the frame via a slide rail, and the drive mechanism is driven by the die.

[0016] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0017] I. This utility model, by adding a protective film conveying mechanism, ensures that the MEA is covered with a protective film during cutting, forming an effective isolation, avoiding contact contamination, ensuring the cleanliness of the material, improving the durability of the MEA, and extending its service life.

[0018] Second, the protective film conveying mechanism added to this utility model conveys the protective film in a winding manner, which can be consistent with the MEA conveying and cutting process, and realizes continuous cutting operation;

[0019] Third, the cloth-laying mechanism in the protective film conveying mechanism can move the protective film up and down. When it moves down, the protective film can better adhere to the MEA semi-finished product. When it moves up, it will not interfere with the exit of the MEA semi-finished product to the unloading station.

[0020] Fourth, the protective film conveying mechanism is equipped with a meter counter, which can sense the quantity of protective film on the feeding roller through tension sensing, so as to provide early warning of whether there is a shortage of material. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the decomposed structure of MEA semi-finished product;

[0022] Figure 2 A three-dimensional structural diagram of the MEA cutting mechanism provided by this utility model;

[0023] Figure 3 This is a front view structural diagram of the MEA cutting mechanism provided by this utility model;

[0024] Figure 4 This is a schematic diagram of the cutting and conveying mechanism;

[0025] Figure 5 This is a schematic diagram of the protective membrane delivery mechanism.

[0026] In the attached diagram: 1. Cutting punch; 11. Lower plate; 12. Stamping cylinder; 13. Upper plate; 2. Cutting conveying mechanism; 21. Frame; 22. Slide rail; 23. Die; 24. Drive mechanism; 25. Loading station; 26. Cutting station; 27. Unloading station; 3. Protective film conveying mechanism; 30. Vertical plate; 31. Feeding roller; 32. Receiving roller; 33. First rotating column; 34. Second rotating column; 35. First cloth feeder; 351. Connecting plate; 352. Third rotating column; 353. Drive source; 36. Second cloth feeder; 37. Protective film; 38. Meter counter; 10. 3CCM; 20. Frame film; 201. Hole; 40. Carbon paper. Detailed Implementation

[0027] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0028] like Figure 2 , Figure 3 As shown, the MEA cutting mechanism provided in this embodiment includes a cutting punch 1, a cutting conveying mechanism 2, and a protective film conveying mechanism 3.

[0029] The upper end of the cutting and punching press 1 is provided with a lower plate 11 and an upper plate 13 mounted on the lower plate 11 via a stamping cylinder 12. The stamping cylinder 12 drives the upper plate 13 up and down to realize the stamping and cutting of MEA semi-finished products.

[0030] The cutting and conveying mechanism 2 is located on the upper surface of the lower plate 11 and sequentially forms a loading station 25, a cutting station 26, and a unloading station 27. For example... Figure 4 As shown, the cutting and conveying mechanism 2 includes a frame 21, a slide rail 22, a die 23, and a drive mechanism 24. The frame 21 is connected to the lower plate 11, and the loading station 25, the cutting station 26, and the unloading station 27 are sequentially formed on the frame 21. The die 23 is slidably connected to the frame 21 via the slide rail 22, and the drive mechanism 24 is drivenly connected to the die 23. The drive mechanism 24 consists of a servo motor and a lead screw.

[0031] like Figure 3 , Figure 5 As shown, the protective film conveying mechanism 3 includes a protective film 37, a vertical plate 30 connected to the side of the cutting punch 1, a feeding roller 31 rotatably mounted on the vertical plate 30, a receiving roller 32, a first rotating column 33, a second rotating column 34, a first fabric feeding mechanism 35, and a second fabric feeding mechanism 36. The first fabric feeding mechanism 35 and the second fabric feeding mechanism 36 are located above the cutting station 26.

[0032] The first rotating column 33 is located below the feeding roller 31, the second rotating column 34 is located below the receiving roller 32, the first fabric spreading mechanism 35 is located outside the first rotating column 33, and the second fabric spreading mechanism 36 is located outside the second rotating column 34. The feeding roller 31, the first rotating column 33, and the first fabric spreading mechanism 35 are located on one side of the upright plate 30, and the receiving roller 32, the second rotating column 34, and the second fabric spreading mechanism 36 are located on the other side of the upright plate 30. The feeding roller 31, the first rotating column 33, and the first fabric spreading mechanism 35 on one side are symmetrically arranged with the receiving roller 32, the second rotating column 34, and the second fabric spreading mechanism 36 on the other side.

[0033] Both the first fabric-laying mechanism 35 and the second fabric-laying mechanism 36 include a connecting plate 351, a third rotating column 352, and a drive source 353. The connecting plate 351 is slidably connected to the upright plate 30 in a vertical direction. Two third rotating columns 352 are provided on the connecting plate 351, and the two third rotating columns 352 are arranged vertically on the upright plate 30. The drive source 353 is an air pipe, and its telescopic rod is connected to the connecting plate 351.

[0034] The protective film 37 rotates around the feeding roller 31; the protective film 37 is fed downward from the feeding roller 31 into the first rotating column 33; then rotates around the first rotating column 33 and enters the third rotating column 352 at the upper end of the first feeding mechanism 35; then moves downward from the upper third rotating column 352 into the third rotating column 352 at the lower end of the first feeding mechanism 35; then passes through the space between the upper plate 13 and the die 23; then enters the third rotating column 352 at the lower end of the second feeding machine 36; then moves upward into the third rotating column 352 at the upper end of the second feeding machine 36; after rotating around the third rotating column 352, it enters the second rotating column 34; after rotating around the second rotating column 34, it tilts upward into the take-up roller 32, and finally is wound up on the take-up roller 32.

[0035] The working method of the MEA cutting mechanism provided by this utility model includes the following steps:

[0036] S1, Start the cutting and conveying mechanism 2 to transport the die 23 to the loading station 25;

[0037] S2, the MEA semi-finished product is placed on the die 23 via a conveying and transfer platform (not shown), and the MEA is positioned by the positioning pins (not shown) on the die 23;

[0038] S3, start the cutting and conveying mechanism 2 to transport the die 23 to the cutting station 26;

[0039] S4. Confirm whether the protective film 37 between the first fabrication mechanism 35 and the second fabrication mechanism 36 is new material. If not, start the feeding roller 31 and the receiving roller 32 to move the new protective film 37 between the first fabrication mechanism 35 and the second fabrication mechanism 36.

[0040] S5, the first fabrication mechanism 35 and the second fabrication mechanism 36 are activated to push the protective film 37 down until it is attached to the upper surface of the MEA semi-finished product;

[0041] S6, start the punching cylinder 12 of the cutting punch press 1, lower the upper plate 13 onto the die 23 to achieve punching; then remove the upper plate 13;

[0042] S7. After stamping is completed, the cutting and conveying mechanism 2 is started to transport the die 23 to the unloading station 27; the feeding roller 31 and the receiving roller 32 are started to move the new protective film 37 between the first feeding mechanism 35 and the second feeding mechanism 36, and the cut protective film 37 is rolled up in the receiving roller 32.

[0043] S8, the MEA at unloading station 27 is then conveyed to the next station. Repeat the above steps until all cutting is completed.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A MEA cutting mechanism, comprising a cutting punch (1), the cutting punch (1) including a lower plate (11) and an upper plate (13) that moves vertically relative to the lower plate (11) to perform a cutting action, characterized in that, It also includes a cutting and conveying mechanism (2) and a protective film conveying mechanism (3); The cutting and conveying mechanism (2) is located on the upper surface of the lower plate (11) and has a loading station (25), a cutting station (26) and a unloading station (27) in sequence. The cutting and conveying mechanism (2) is provided with a cutting die (23) that travels back and forth between the above stations. When the cutting die (23) travels to the cutting station (26), it is located below the upper plate (13). The protective film conveying mechanism (3) is located on the side of the cutting punch (1) and adjacent to the cutting station (26). The protective film conveying mechanism (3) conveys the protective film (37) between the upper plate (13) and the die (23) by means of taking in and releasing the protective film (37).

2. The MEA cutting mechanism according to claim 1, characterized in that, The protective film conveying mechanism (3) includes a vertical plate (30) connected to the side of the cutting punch (1) and a feeding roller (31), a receiving roller (32), a first rotating column (33), a second rotating column (34), a first fabric feeding mechanism (35), and a second fabric feeding mechanism (36) rotatably mounted on the vertical plate (30). The protective film (37) is connected in sequence to the feeding roller (31), the first rotating column (33), the first feeding mechanism (35), the second feeding mechanism (36), the second rotating column (34) and the receiving roller (32). The protective film (37) between the first feeding mechanism (35) and the second feeding mechanism (36) is located between the upper plate (13) and the die (23).

3. The MEA cutting mechanism according to claim 2, characterized in that, The first rotating column (33) is located below the feeding roller (31), the second rotating column (34) is located below the receiving roller (32), the first feeding mechanism (35) is located outside the first rotating column (33), and the second feeding mechanism (36) is located outside the second rotating column (34).

4. The MEA cutting mechanism according to claim 2, characterized in that, The feeding roller (31), the first rotating column (33) and the first spreading mechanism (35) are located on one side of the vertical plate (30), and the receiving roller (32), the second rotating column (34) and the second spreading mechanism (36) are located on the other side of the vertical plate (30). The feeding roller (31), the first rotating column (33) and the first spreading mechanism (35) on one side are symmetrically arranged with the receiving roller (32), the second rotating column (34) and the second spreading mechanism (36) on the other side.

5. The MEA cutting mechanism according to claim 2, characterized in that, The first fabric-making mechanism (35) and the second fabric-making mechanism (36) both include a connecting plate (351), a third rotating column (352) and a driving source (353). The connecting plate (351) is slidably connected to the upright plate (30) in the vertical direction. At least one third rotating column (352) is provided on the connecting plate (351). The driving source (353) is connected to the connecting plate (351). The protective film (37) rotates around the third rotating column (352).

6. The MEA cutting mechanism according to claim 2, characterized in that, The second rotating column (34) is equipped with a meter counter (38).

7. The MEA cutting mechanism according to any one of claims 1-6, characterized in that, The cutting and conveying mechanism (2) includes a drive mechanism (24) and a frame (21) connected to the lower plate (11). The loading station (25), the cutting station (26) and the unloading station (27) are sequentially formed on the frame (21). The die (23) is slidably connected to the frame (21) through a slide rail (22). The drive mechanism (24) is driven to connect with the die (23).

Images