Integrated film pad structure, pole frame assembly and assembling method

Abstract

The invention belongs to the technical field of fuel cells, and discloses an integrated membrane pad structure, a pole frame assembly and an assembling method.The integrated membrane pad structure comprises a proton exchange membrane, rubber is arranged on the edge of the periphery of the proton exchange membrane, an adjusting assembly is arranged in the rubber, and the adjusting assembly comprises a baffle arranged in the rubber; the outer wall of the baffle is fixedly connected with a second sliding block, the second sliding block is slidably installed on the inner wall of the rubber, during installation, the proton exchange membrane is placed between the two bipolar plates, the moving shaft in one frame is rotated, the moving shaft rotates to drive the fixed shaft to rotate, and the proton exchange membrane is fixed through the fixed shaft; and the threaded rod in one frame is embedded into the other frame and is in threaded connection with the frame, so that the assembly process of the fuel cell is simplified, the manufacturing cost is reduced, the number of assembly parts and interfaces is reduced, the risk of system failure is reduced, and the overall reliability is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells, and specifically relates to an integrated membrane pad structure, a pole frame assembly and an assembly method. Background Art

[0002] A fuel cell is a chemical power source that directly converts the chemical energy of a fuel (such as hydrogen, methanol, etc.) into electrical energy. Its working principle is to cause an electrochemical reaction between the fuel and the oxidant (such as oxygen) through an electrolyte, thereby generating a potential difference, thereby forming a low-voltage direct current output; Fuel cells are mainly composed of proton exchange membranes (PEM) and bipolar plates (anode plates and cathode plates). The proton exchange membrane is the core of the fuel cell. It is not only an electrolyte, but also the substrate of the electrode active material. The bipolar plate is used to support and separate the gas electrodes and provide channels for the reaction gas. The gas diffusion electrode is responsible for transporting the reaction gas to the catalyst layer for electrochemical reaction. In current technical applications, the proton exchange membrane must be accurately installed between the bipolar plates and connected by seals and fasteners. Their coordination and precise installation are the key to ensuring the performance of the fuel cell. The entire installation process is not only cumbersome, but also requires high installation accuracy, resulting in low installation efficiency. Summary of the invention

[0003] The object of the present invention is to provide an integrated membrane pad structure, a pole frame assembly and an assembly method to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solution: an integrated membrane pad structure, comprising a proton exchange membrane, wherein rubber is arranged around the edges of the proton exchange membrane, and an adjustment component is arranged inside the rubber; Among them, the adjustment component includes a baffle plate arranged inside the rubber, the outer wall of the baffle plate is fixedly connected to a second slider, the second slider is slidably installed on the inner wall of the rubber, the inner wall of the second slider is slidably connected to a fixing rod, the fixing rod is fixedly installed on the inner wall of the rubber, and the outer wall of the fixing rod is provided with a spring.

[0005] As a further technical solution of the present invention, a connecting pipe is fixedly connected to the side wall of the rubber.

[0006] A pole frame assembly, the pole frame assembly is based on an integrated membrane pad structure, the pole frame assembly includes a bipolar plate, two bipolar plates are provided, the outsides of the two bipolar plates are both installed with a frame, and the two frames are connected by a mounting mechanism; Wherein, the mounting mechanism includes a threaded rod arranged between the two frame frames, and there are multiple threaded rods. One end of each threaded rod is fixedly connected to a connecting shaft, and one end of each connecting shaft is fixedly connected to a movable shaft via a fixed shaft, and each movable shaft is installed inside the frame via a rotating mechanism.

[0007] As a further technical solution of the present invention, the outer wall of each connecting shaft is fixedly connected with a connecting block, and every two connecting shafts are connected through a pulley group.

[0008] As a further technical solution of the present invention, the rotating mechanism includes a first slider fixedly installed inside the frame, the first slider is embedded in the inner wall of the slide groove, the first slider is slidably connected to the slide groove, and the slide groove is opened on the outer wall of the movable shaft.

[0009] As a further technical solution of the present invention, a push block is provided at one end of the movable shaft, and a push plate is fixedly connected to the side wall of the push block.

[0010] As a further technical solution of the present invention, the push block and the moving shaft are rotationally connected.

[0011] As a further technical solution of the present invention, a second magnetic block is fixedly connected to one side of the push plate, a first magnetic block is arranged on one side of the second magnetic block, and the first magnetic block is fixedly mounted on the side wall of the frame.

[0012] As a further technical solution of the present invention, a piston is slidably connected to the inside of the frame, a connecting rod is fixedly connected to one side of the piston, a connecting plate is fixedly installed at one end of the connecting rod, a movable plate is fixedly connected to one end of the connecting plate, and the movable plate is rotatably installed on the outer wall of the fixed shaft.

[0013] The assembly method of the integrated membrane pad structure and the pole frame assembly comprises the following steps: S1: When installing the pole frame assembly, first place the proton exchange membrane between the two bipolar plates so that the connecting tube is embedded in the frame; S2: Then push the push block inside one of the frames inward, the movement of the push block drives the movement of the moving shaft, the movement of the moving shaft drives the slide groove to slide on the outer wall of the first sliding block, so that the moving shaft rotates, the rotation of the moving shaft drives the rotation of the fixed shaft, the rotation of the fixed shaft drives the rotation of the connecting shaft, the rotation of the connecting shaft drives the rotation of the connecting block, the rotation of the connecting block drives the other connecting shafts to rotate synchronously through the pulley group, the rotation of the connecting shaft drives the rotation of the threaded rod, so that the threaded rod inside one of the frames is embedded in the inside of the other frame, and the two are threadedly connected; S3: When the moving axis moves in the frame, it drives the moving plate to move, the movement of the moving plate drives the movement of the connecting plate, the movement of the connecting plate drives the movement of the connecting rod, the movement of the connecting rod drives the movement of the piston, and the piston squeezes the gas on one side to be discharged outward into the rubber; S4: When the piston moves to squeeze the gas into the rubber, the air pressure drives the baffle to move to one side, and the movement of the baffle drives the second slider to slide on the outer wall of the fixed rod. At the same time, the spring deforms to store elastic potential energy. After the baffle opens the gas channel, the gas enters the rubber, and the gas pressure inside the rubber is adjusted to make the rubber expand, so that it fits tightly between the bipolar plate and the proton exchange membrane to seal. S5: When the push block moves to one side of the frame, the movement of the push block drives the movement of the push plate, and the movement of the push plate drives the second magnetic block to move to one side of the first magnetic block. Finally, the second magnetic block and the first magnetic block are connected by the suction force between them.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention integrates the proton exchange membrane and the rubber into one. During installation, the proton exchange membrane is placed between two bipolar plates, and the movable shaft inside one of the frames is rotated. The rotation of the movable shaft drives the rotation of the fixed shaft, and the rotation of the fixed shaft drives the rotation of the connecting shaft. The rotation of the connecting shaft drives the rotation of the threaded rod, so that the threaded rod inside one of the frames is embedded in the inside of the other frame, and the two are threadedly connected, which simplifies the assembly process of the fuel cell, reduces the manufacturing cost, reduces the number of assembly parts and interfaces, reduces the risk of system failure, and improves the overall reliability.

[0015] 2. The present invention sets a rotating mechanism. When installing two frames, the movable shaft is pushed into the frame. The movement of the movable shaft drives the slide groove to slide on the outer wall of the first sliding block, causing the movable shaft to rotate, thereby driving the threaded rod to rotate through the connection between the fixed shaft and the connecting shaft. Compared with driving the threaded rod to rotate and connect by rotating the movable shaft, the method of directly pushing the movable shaft in is simpler and more convenient.

[0016] 3. The present invention sets an adjustment component. When the piston moves to squeeze the gas into the rubber, the air pressure drives the baffle to move to one side. The movement of the baffle drives the second slider to slide on the outer wall of the fixed rod. At the same time, the spring deforms to store elastic potential energy. After the baffle opens the gas channel, the gas enters the rubber. The gas pressure inside the rubber is adjusted to cause the rubber to expand and fit tightly between the bipolar plate and the proton exchange membrane for sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the integrated membrane pad structure of the present invention; Figure 2 It is a schematic diagram of the cross-section structure of the proton exchange membrane of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 It is a structural schematic diagram of the pole frame assembly of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the frame of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle; Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 8 It is a schematic cross-sectional view of the rubber structure of the present invention; Fig. 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point D in the middle.

[0018] In the figure: 1, proton exchange membrane; 2, rubber; 3, bipolar plate; 4, frame; 5, push block; 6, movable shaft; 7, slide groove; 8, first slider; 9, fixed shaft; 10, connecting shaft; 11, connecting block; 12, threaded rod; 13, pulley set; 14, push plate; 15, first magnetic block; 16, movable plate; 17, connecting plate; 18, connecting rod; 19, piston; 20, baffle; 21, second slider; 22, fixed rod; 23, spring; 24, second magnetic block; 25, connecting pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 9 As shown, in the embodiment of the present invention, the integrated membrane pad structure includes a proton exchange membrane 1, a rubber 2 is arranged around the edge of the proton exchange membrane 1, and an adjustment component is arranged inside the rubber 2; Among them, the adjustment component includes a baffle 20 arranged inside the rubber 2, the outer wall of the baffle 20 is fixedly connected to the second slider 21, the second slider 21 is slidably installed on the inner wall of the rubber 2, the inner wall of the second slider 21 is slidably connected to the fixing rod 22, the fixing rod 22 is fixedly installed on the inner wall of the rubber 2, and the outer wall of the fixing rod 22 is provided with a spring 23.

[0021] The rubber 2 has good elasticity and sealing properties. Compounding it on the edge of the proton exchange membrane 1 can effectively prevent gas and liquid leakage, ensure the stable operation of the fuel cell, and the rubber 2 structure can increase the overall mechanical strength of the membrane pad to prevent damage or deformation caused by mechanical stress during use; The integrated membrane pad structure integrates the proton exchange membrane 1 and the rubber 2 into one, which simplifies the assembly process of the fuel cell, reduces the manufacturing cost, reduces the number of assembly parts and interfaces, reduces the risk of system failure, and improves overall reliability.

[0022] When the integrated membrane pad structure is installed inside the pole frame assembly, when the gas enters the rubber 2, the air pressure drives the baffle 20 to move to one side, and the movement of the baffle 20 drives the second slider 21 to slide on the outer wall of the fixed rod 22. At the same time, the spring 23 deforms to store elastic potential energy. After the baffle 20 opens the gas channel, the gas enters the rubber 2, and the gas pressure inside the rubber 2 is adjusted to make the rubber 2 expand, tightly fit between the bipolar plate 3 and the proton exchange membrane 1, and seal.

[0023] like Figure 3 , Figure 8 and Fig. 9 As shown, a connecting pipe 25 is fixedly connected to the side wall of the rubber 2 .

[0024] When installing the two frames 4 , the proton exchange membrane 1 and the rubber 2 are located between the bipolar plate 3 and the frame 4 , and the connecting pipe 25 is embedded in the frame 4 to limit its position, ensuring that the piston 19 can push the gas into the rubber 2 .

[0025] like Figures 4 to 9 As shown, a pole frame assembly is based on an integrated membrane pad structure, and the pole frame assembly includes a bipolar plate 3, two bipolar plates 3 are provided, and a frame 4 is installed outside the two bipolar plates 3, and the two frames 4 are connected by a mounting mechanism; Among them, the installation mechanism includes a threaded rod 12 arranged between the two frame frames 4, and there are multiple threaded rods 12. One end of each threaded rod 12 is fixedly connected to a connecting shaft 10, and one end of each connecting shaft 10 is fixedly connected to a movable shaft 6 through a fixed shaft 9. Each movable shaft 6 is installed inside the frame 4 through a rotating mechanism.

[0026] During installation, the proton exchange membrane 1 is placed between two bipolar plates 3, and the movable shaft 6 inside one of the frames 4 is rotated. The rotation of the movable shaft 6 drives the rotation of the fixed shaft 9, and the rotation of the fixed shaft 9 drives the rotation of the connecting shaft 10. The rotation of the connecting shaft 10 drives the rotation of the threaded rod 12, so that the threaded rod 12 inside one of the frames 4 is embedded in the inside of the other frame 4, and the two are threadedly connected.

[0027] like Figure 5 , Figure 6 and Figure 7 As shown, a connecting block 11 is fixedly connected to the outer wall of each connecting shaft 10 , and every two connecting shafts 10 are connected through a pulley set 13 .

[0028] When installing two frames 4, the rotation of the connecting shaft 10 drives the rotation of the connecting block 11, and the rotation of the connecting block 11 drives the other connecting shafts 10 to rotate synchronously through the pulley group 13, so that when installing the frame 4, one of the connecting shafts 10 is rotated, and the other connecting shafts 10 are also rotated together, so that all the threaded rods 12 are rotated synchronously for connection, which improves the efficiency during installation; And the synchronous transmission can apply force evenly to prevent the PEM from being damaged by excessive pressure.

[0029] like Figure 5 , Figure 6 and Figure 7 As shown, the rotating mechanism includes a first slider 8 fixedly mounted inside the frame 4 , the first slider 8 is embedded in the inner wall of the slide groove 7 , the first slider 8 is slidably connected to the slide groove 7 , and the slide groove 7 is opened on the outer wall of the movable shaft 6 .

[0030] When installing the two frames 4, the movable shaft 6 is pushed into the frame 4. The movement of the movable shaft 6 drives the slide groove 7 to slide on the outer wall of the first sliding block 8, causing the movable shaft 6 to rotate, thereby driving the threaded rod 12 to rotate through the connection between the fixed shaft 9 and the connecting shaft 10. Compared with driving the threaded rod 12 to rotate and connect by rotating the movable shaft 6, directly pushing the movable shaft 6 in is simpler and more convenient.

[0031] like Figure 5 and Figure 6 As shown, a push block 5 is provided at one end of the movable shaft 6 , and a push plate 14 is fixedly connected to the side wall of the push block 5 .

[0032] like Figure 6 As shown, the push block 5 and the moving shaft 6 are rotationally connected.

[0033] like Figure 6 As shown, a second magnetic block 24 is fixedly connected to one side of the push plate 14 , a first magnetic block 15 is disposed on one side of the second magnetic block 24 , and the first magnetic block 15 is fixedly mounted on the side wall of the frame 4 .

[0034] When installing the two frames 4, the push block 5 moves to one side of the frame 4, and the movement of the push block 5 drives the movement of the push plate 14. The movement of the push plate 14 drives the second magnetic block 24 to move to one side of the first magnetic block 15. The second magnetic block 24 and the first magnetic block 15 are connected by the suction force between them to prevent vibration or shaking during the use or transportation of the fuel cell, which affects the stability of the connection between the two frames 4.

[0035] like Figure 5 , Figure 6 and Fig. 9 As shown, a piston 19 is slidably connected inside the frame 4, a connecting rod 18 is fixedly connected to one side of the piston 19, a connecting plate 17 is fixedly installed at one end of the connecting rod 18, a movable plate 16 is fixedly connected to one end of the connecting plate 17, and the movable plate 16 is rotatably installed on the outer wall of the fixed shaft 9.

[0036] When installing the two frames 4, the movable shaft 6 moves into the frame 4 to drive the movement of the movable plate 16, the movement of the movable plate 16 drives the movement of the connecting plate 17, the movement of the connecting plate 17 drives the movement of the connecting rod 18, and the movement of the connecting rod 18 drives the movement of the piston 19, squeezing the gas on one side of the piston 19 to be discharged outward into the rubber 2.

[0037] The assembly method of the integrated membrane pad structure and the pole frame assembly comprises the following steps: S1: When installing the pole frame assembly, first place the proton exchange membrane 1 between the two bipolar plates 3 so that the connecting pipe 25 is embedded in the frame 4; S2: Then push the push block 5 inside one of the frames 4 inward, the movement of the push block 5 drives the movement of the moving shaft 6, the movement of the moving shaft 6 drives the slide groove 7 to slide on the outer wall of the first sliding block 8, so that the moving shaft 6 rotates, the rotation of the moving shaft 6 drives the rotation of the fixed shaft 9, the rotation of the fixed shaft 9 drives the rotation of the connecting shaft 10, the rotation of the connecting shaft 10 drives the rotation of the connecting block 11, the rotation of the connecting block 11 drives the other connecting shafts 10 to rotate synchronously through the pulley group 13, the rotation of the connecting shaft 10 drives the rotation of the threaded rod 12, so that the threaded rod 12 inside one of the frames 4 is embedded in the inside of the other frame 4, and the two are threadedly connected; S3: When the movable shaft 6 moves into the frame 4, the movable plate 16 is driven to move, the movement of the movable plate 16 drives the movement of the connecting plate 17, the movement of the connecting plate 17 drives the movement of the connecting rod 18, the movement of the connecting rod 18 drives the movement of the piston 19, and the piston 19 squeezes the gas on one side and discharges it outward into the rubber 2; S4: When the piston 19 moves to squeeze the gas into the rubber 2, the air pressure drives the baffle 20 to move to one side, and the movement of the baffle 20 drives the second slider 21 to slide on the outer wall of the fixed rod 22. At the same time, the spring 23 deforms to store elastic potential energy. After the baffle 20 opens the gas channel, the gas enters the rubber 2, and the gas pressure inside the rubber 2 is adjusted to make the rubber 2 expand, and fit tightly between the bipolar plate 3 and the proton exchange membrane 1 to perform sealing; S5: When the push block 5 moves toward one side of the frame 4, the movement of the push block 5 drives the movement of the push plate 14, and the movement of the push plate 14 drives the second magnetic block 24 to move toward one side of the first magnetic block 15. Finally, the second magnetic block 24 and the first magnetic block 15 are connected by the suction force between them.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated membrane pad structure, comprising a proton exchange membrane (1), characterized in that: The edges of the proton exchange membrane (1) are provided with rubber (2), and an adjustment component is provided inside the rubber (2); The adjustment assembly comprises a baffle (20) arranged inside the rubber (2); the outer wall of the baffle (20) is fixedly connected to a second slider (21); the second slider (21) is slidably mounted on the inner wall of the rubber (2); the inner wall of the second slider (21) is slidably connected to a fixing rod (22); the fixing rod (22) is fixedly mounted on the inner wall of the rubber (2); and the outer wall of the fixing rod (22) is provided with a spring (23).

2. The integrated membrane pad structure according to claim 1, characterized in that: A connecting tube (25) is fixedly connected to the side wall of the rubber (2).

3. A pole frame assembly, characterized in that: The pole frame assembly is based on the integrated membrane pad structure according to claim 1, and the pole frame assembly comprises a bipolar plate (3), two bipolar plates (3) are provided, and the outsides of the two bipolar plates (3) are both installed with a frame (4), and the two frames (4) are connected by a mounting mechanism; The mounting mechanism comprises a threaded rod (12) arranged between the two frame frames (4), a plurality of threaded rods (12) are provided, one end of each threaded rod (12) is fixedly connected to a connecting shaft (10), one end of each connecting shaft (10) is fixedly connected to a movable shaft (6) via a fixed shaft (9), and each movable shaft (6) is mounted inside the frame frame (4) via a rotating mechanism.

4. A pole frame assembly according to claim 3, characterized in that: The outer wall of each connecting shaft (10) is fixedly connected to a connecting block (11), and each two connecting shafts (10) are connected in transmission via a pulley set (13).

5. A pole frame assembly according to claim 3, characterized in that: The rotating mechanism comprises a first sliding block (8) fixedly mounted inside the frame (4); the first sliding block (8) is embedded in the inner wall of the sliding groove (7); the first sliding block (8) is slidably connected to the sliding groove (7); and the sliding groove (7) is provided on the outer wall of the movable shaft (6).

6. A pole frame assembly according to claim 3, characterized in that: A push block (5) is provided at one end of the movable shaft (6), and a push plate (14) is fixedly connected to the side wall of the push block (5).

7. A pole frame assembly according to claim 6, characterized in that: The push block (5) and the moving shaft (6) are rotationally connected.

8. A pole frame assembly according to claim 6, characterized in that: A second magnetic block (24) is fixedly connected to one side of the push plate (14), a first magnetic block (15) is provided on one side of the second magnetic block (24), and the first magnetic block (15) is fixedly mounted on the side wall of the frame (4).

9. A pole frame assembly according to claim 3, characterized in that: A piston (19) is slidably connected to the interior of the frame (4); a connecting rod (18) is fixedly connected to one side of the piston (19); a connecting plate (17) is fixedly mounted to one end of the connecting rod (18); a movable plate (16) is fixedly connected to one end of the connecting plate (17); and the movable plate (16) is rotatably mounted on the outer wall of the fixed shaft (9).

10. An assembly method of an integrated membrane pad structure and a pole frame assembly, the method being applicable to the integrated membrane pad structure and the pole frame assembly as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When installing the pole frame assembly, firstly place the proton exchange membrane (1) between the two bipolar plates (3) so that the connecting pipe (25) is embedded in the frame (4); S2: Then, the push block (5) inside one of the frames (4) is pushed inward, and the movement of the push block (5) drives the movement of the moving shaft (6), and the movement of the moving shaft (6) drives the slide groove (7) to slide on the outer wall of the first sliding block (8), so that the moving shaft (6) rotates, and the rotation of the moving shaft (6) drives the rotation of the fixed shaft (9), and the rotation of the fixed shaft (9) drives the rotation of the connecting shaft (10), and the rotation of the connecting shaft (10) drives the rotation of the connecting block (11), and the rotation of the connecting block (11) drives the other connecting shafts (10) to rotate synchronously through the pulley group (13), and the rotation of the connecting shaft (10) drives the rotation of the threaded rod (12), so that the threaded rod (12) inside one of the frames (4) is embedded in the inside of the other frame (4), and the two are threadedly connected; S3: When the movable shaft (6) moves into the frame (4), the movable plate (16) is driven to move, the movement of the movable plate (16) drives the movement of the connecting plate (17), the movement of the connecting plate (17) drives the movement of the connecting rod (18), the movement of the connecting rod (18) drives the movement of the piston (19), and the piston (19) squeezes the gas on one side and discharges it outward into the rubber (2); S4: When the piston (19) moves to squeeze the gas into the rubber (2), the gas pressure drives the baffle (20) to move to one side. The movement of the baffle (20) drives the second slider (21) to slide on the outer wall of the fixed rod (22). At the same time, the spring (23) deforms to store elastic potential energy. After the baffle (20) opens the gas channel, the gas enters the rubber (2). The gas pressure inside the rubber (2) is adjusted to cause the rubber (2) to expand and fit tightly between the bipolar plate (3) and the proton exchange membrane (1) to achieve sealing. S5: When the push block (5) moves toward one side of the frame (4), the movement of the push block (5) drives the movement of the push plate (14), and the movement of the push plate (14) drives the second magnetic block (24) to move toward one side of the first magnetic block (15), and finally the second magnetic block (24) and the first magnetic block (15) are connected by the suction force between the two.

Images