A device and method for reshaping and repairing a membrane electrode of a pem electrolyzer

Abstract

This invention relates to the field of PEM electrolytic cell membrane electrode repair technology, and discloses a shaping and repair device and method for PEM electrolytic cell membrane electrodes. The device includes a base, a repair mechanism on the top of the base, a constant temperature circulation machine and a control device fixedly installed on the top of the base, and a water tank on the top of the base. The water tank is equipped with an air supply component, a water supply component, and a moisture output component. The repair mechanism is used to apply pressure to shape the membrane electrode. This invention uses a constant temperature circulation machine to control the temperature of the first and second clamping plates, enabling uniform heating or cooling of the membrane electrode. This results in high heat transfer efficiency, ensuring thermal field uniformity and shaping stability. By using an electric linear module and a pressure sensor to control the downward pressure of the first clamping plate, replacing traditional screw tightening, the clamping force can be monitored and adjusted in real time, completely avoiding local stress concentration and significantly improving stress relief efficiency and shaping accuracy.

Description

Technical Field

[0001] This invention relates to the field of PEM electrolytic cell membrane electrode repair technology, specifically to a device and method for reshaping and repairing PEM electrolytic cell membrane electrodes. Background Technology

[0002] The membrane electrode assembly (MEA) of a proton exchange membrane electrolyzer is a core component, and its flatness directly affects the electrolyzer's assembly sealing and operational efficiency. During production, transportation, and assembly / disassembly, the MEA is prone to plastic deformation such as warping and wrinkling due to thermal stress, humidity changes, and mechanical extrusion. Deformed MEAs cannot meet high-precision assembly requirements and are often discarded, resulting in wasted costs.

[0003] Currently, the industry lacks dedicated equipment for repairing deformed film electrodes. Common methods include simply clamping the electrode in a flat fixture and then heating it in an oven, or subjecting it to environmental humidification. These methods have significant drawbacks:

[0004] Poor repair results: The use of an external oven for heating results in low heat transfer efficiency, uneven temperature, and the inability to achieve rapid cooling and shaping, leading to incomplete stress relief.

[0005] Rough pressure application: Using ordinary screws for tightening makes it impossible to quantify the clamping force, and the force is unevenly distributed, which can easily lead to local stress concentration or improper clamping, affecting the shaping accuracy. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for shaping and repairing PEM electrolytic cell membrane electrodes, which solves the problems of poor repair effect and rough pressure application in the prior art due to the lack of dedicated equipment for repairing deformed membrane electrodes.

[0007] The present invention provides the following technical solution: a shaping and repair device for a PEM electrolytic cell membrane electrode, comprising a base, a repair mechanism disposed on the top of the base, a constant temperature circulation machine and a control device fixedly installed on the top of the base, a water tank disposed on the top of the base, and an air supply component, a water supply component and a moisture output component disposed on the water tank, the repair mechanism being used to apply pressure to shape the membrane electrode, the constant temperature circulation machine being used to control the temperature of the pressing end of the repair mechanism, and the water tank, air supply component, water supply component and moisture output component being used to humidify the membrane electrode;

[0008] The repair mechanism includes a frame, which is fixedly installed on the top of the base. An electric linear module is fixedly installed on the outer wall of the frame. A lifting arm is fixedly installed on the lifting end of the electric linear module. A pressure sensor is fixedly installed at the bottom of the lifting arm. A first clamping plate is fixedly installed at the bottom of the pressure sensor. A second clamping plate is fixedly installed on the top of the frame. The first and second clamping plates are directly opposite each other. Fluid interfaces are fixedly connected to both sides of the first and second clamping plates. Internal flow channels are opened inside the first and second clamping plates. The fluid interfaces and the inner cavities of the internal flow channels are connected.

[0009] As a preferred embodiment of the above technical solution, the bottom of the first clamping plate is provided with a frame-shaped groove, and a frame-shaped component is fixedly installed on the bottom of the inner wall of the frame-shaped groove. A humidification interface is fixedly connected to the side of the first clamping plate. The bottom of the first clamping plate is provided with a membrane electrode mating groove, and a micro humidification hole is provided on the inner wall of the membrane electrode mating groove. The inner cavities of the humidification interface, the frame-shaped groove, and the micro humidification hole are connected. The diameter of the micro humidification hole is 0.1 mm, and the spacing between the micro humidification holes is 5 mm.

[0010] As a preferred embodiment of the above technical solution, a support leg is fixedly installed at the bottom of the water tank, the support leg is fixedly installed at the top of the base, an ultrasonic atomizer is fixedly installed at the bottom of the inner wall of the water tank, an air inlet is provided on one side of the water tank, and an exhaust port is provided on the other side of the water tank.

[0011] As a preferred embodiment of the above technical solution, the air supply assembly includes a support, which is fixedly installed on the side of the water tank. A rubber shock-absorbing pad is fixedly installed on the top of the support, and a miniature air pump is fixedly installed on the top of the rubber shock-absorbing pad. The output end of the miniature air pump is fixedly connected to the side of the water tank, and a flange seat is fixedly connected to the input end of the miniature air pump. An air filter cartridge is detachably connected to the side of the flange seat away from the miniature air pump.

[0012] As a preferred embodiment of the above technical solution, the water supply assembly includes a water supply pipe, which is fixedly installed on the top of the water tank and extends to the inner cavity of the water tank at its bottom. A water supply valve is fixedly connected to the top of the water supply pipe, and a plug is movably inserted into the top of the water supply valve. A water storage tank is fixedly connected to the top of the plug, and a top cover is threadedly connected to the top of the water storage tank. A raised frame is fixedly installed on the top of the top cover, and a dustproof net is fixedly installed on the inner wall of the top cover.

[0013] As a preferred embodiment of the above technical solution, a collar is fixedly sleeved on the outer wall of the water supply pipe, a sliding rod is slidably connected to the inner wall of the collar, a plug is fixedly installed at the bottom of the sliding rod, the plug is movably inserted into the bottom of the water supply pipe, and a float is fixedly installed at the bottom of the plug.

[0014] As a preferred embodiment of the above technical solution, the moisture output component includes an L-shaped tube, which is fixedly connected to the side of the water tank. An output hose is threadedly connected to the top of the L-shaped tube. An inner partition is fixedly installed on the inner wall of the L-shaped tube. A rubber cylinder is fixedly connected to the bottom of the inner partition. An alloy cylinder is fixedly connected to the bottom of the rubber cylinder. A cylindrical filter screen is fixedly connected to the bottom of the alloy cylinder. An elastic element is fixedly installed at the bottom of the inner wall of the L-shaped tube, and the top of the elastic element is fixedly connected to the bottom of the cylindrical filter screen.

[0015] As a preferred embodiment of the above technical solution, a flow-guiding inner plate is fixedly installed on the inner wall of the L-shaped tube, a circular through groove is provided on the flow-guiding inner plate, a bracket is fixedly installed on the inner wall of the circular through groove, a rotating shaft is rotatably connected to the inner wall of the bracket, a blade located in the inner cavity of the circular through groove is fixedly installed on the outer wall of the rotating shaft, a rotating arm is fixedly installed on the top of the rotating shaft, and a rotating wheel is rotatably connected to the end of the rotating arm.

[0016] As a preferred embodiment of the above technical solution, a valve is fixedly connected to the bottom of the L-shaped tube, a water storage tank is fixedly connected to the bottom of the valve, a valve is fixedly connected to the bottom of the water storage tank, and a threaded cap is threadedly connected to the bottom of the L-shaped tube.

[0017] This invention provides the following technical solution: a method for reshaping and repairing a PEM electrolytic cell membrane electrode, comprising the following steps:

[0018] S1. Clamping: The membrane electrode to be repaired is placed on top of the second clamping plate. The program is started, and the electric linear module drives the first clamping plate to descend. When the pressure sensor detects that the pressure reaches 100N, it stops, and the membrane electrode is gently clamped.

[0019] S2. Coordinated humidification and preheating: The micro air pump and ultrasonic atomizer are started, and the atomized water vapor is evenly sprayed out from the micro humidification hole of the first clamping plate to wet the membrane electrode below. At the same time, the constant temperature circulation machine works to pump 40°C hot water into the internal flow channel of the first and second clamping plates, so that the temperature rises and stabilizes at 40°C for 2 minutes.

[0020] S3. Heating and Pressurizing Shaping: After 2 minutes, the control device shuts off the micro air pump and ultrasonic atomizer, switches the constant temperature circulation machine to a high temperature medium of 85°C, and the temperature of the first clamping plate and the second clamping plate rises rapidly to 85°C. At the same time, the control device instructs the electric linear module to continue to apply thrust until the pressure sensor reading reaches the corresponding 0.8MPa, and maintains this state precisely for 20 minutes.

[0021] S4. Cooling and Shaping: After 20 minutes, the constant temperature circulation machine switches to a 15°C cooling medium, and the first and second clamping plates begin to cool down. During this process, the control system maintains a constant pressure of 0.8MPa. After about 5 minutes, the temperature drops to 15°C and continues to maintain this low temperature and low pressure state for 5 minutes. The total cooling time is 10 minutes.

[0022] S5. Unloading: The program ends, the electric linear module drives the first clamping plate to rise, and the repaired membrane electrode is taken out.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This invention employs a constant-temperature circulating machine to control the temperature of the first and second clamping plates, enabling uniform heating or cooling of the membrane electrode. This results in high heat transfer efficiency, ensuring thermal uniformity and shaping stability. By using an electric linear module and pressure sensor to control the downward pressing of the first clamping plate, replacing traditional screw locking, the clamping force can be monitored and adjusted in real time, completely avoiding local stress concentration. This allows warpage and wrinkles to achieve reversible plastic recovery under the synergistic effect of heat and force, significantly improving stress relief efficiency and shaping accuracy. This increases the pass rate of deformed membrane electrode repair and greatly reduces the scrap cost of core components. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a schematic diagram of the repair mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the separation structure of the first clamping plate of the present invention;

[0028] Figure 4 This is a schematic diagram of the bottom structure of the first clamping plate of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the water tank of the present invention;

[0030] Figure 6 This is a schematic diagram of the gas supply component of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the water tank of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the water storage tank of the present invention;

[0033] Figure 9 This is a schematic diagram of the bottom component structure of the water supply pipe of the present invention;

[0034] Figure 10 This is a schematic diagram of the structure of the moisture output component of the present invention;

[0035] Figure 11 This is a schematic diagram of the internal structure of the L-shaped tube of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the inner drainage plate of the present invention.

[0037] In the diagram: 1. Base; 2. Repair mechanism; 21. Frame; 22. Electric linear module; 23. Lifting arm; 24. Pressure sensor; 25. First clamping plate; 251. Fluid interface; 252. Internal flow channel; 253. Humidification interface; 254. Frame groove; 255. Frame component; 256. Miniature humidification hole; 257. Membrane electrode mating groove; 26. Second clamping plate; 3. Constant temperature circulation machine; 4. Control device; 5. Water tank; 51. Support leg; 52. Ultrasonic atomizer; 53. Air inlet; 54. Exhaust port; 6. Air supply assembly; 61. Support; 62. Rubber shock-absorbing pad; 63. Miniature air pump; 64. Flange seat; 65. Air filter cartridge; 7. 71. Water supply assembly; 71. Water supply pipe; 711. Collar; 712. Slide rod; 713. Plug; 714. Float; 72. Water supply valve; 73. Plug; 74. Water storage tank; 75. Top cover; 76. Raised frame; 77. Dustproof net; 8. Moisture output assembly; 81. L-shaped pipe; 82. Output hose; 83. Valve one; 84. Water storage tank; 85. Valve two; 86. Threaded cover; 87. Inner partition; 871. Rubber cylinder; 872. Alloy cylinder; 873. Cylindrical filter screen; 874. Elastic element; 88. Drainage inner plate; 881. Circular through groove; 882. Bracket; 883. Rotating shaft; 884. Blade; 885. Rotating arm; 886. Rotating wheel. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] Example 1

[0040] like Figures 1-4 As shown, the present invention provides a technical solution: a shaping and repair device for a PEM electrolytic cell membrane electrode, comprising a base 1, a repair mechanism 2 disposed on the top of the base 1, a constant temperature circulation machine 3 and a control device 4 fixedly installed on the top of the base 1, a water tank 5 disposed on the top of the base 1, and an air supply component 6, a water supply component 7 and a moisture output component 8 disposed on the water tank 5. The repair mechanism 2 is used to apply pressure to shape the membrane electrode, the constant temperature circulation machine 3 is used to control the temperature of the pressing end of the repair mechanism 2, and the water tank 5, the air supply component 6, the water supply component 7 and the moisture output component 8 are used to humidify the membrane electrode.

[0041] The repair mechanism 2 includes a frame 21, which is fixedly mounted on the top of the base 1. An electric linear module 22 is fixedly mounted on the outer wall of the frame 21. A lifting arm 23 is fixedly mounted on the lifting end of the electric linear module 22. A pressure sensor 24 is fixedly mounted on the bottom of the lifting arm 23. A first clamping plate 25 is fixedly mounted on the bottom of the pressure sensor 24. A second clamping plate 26 is fixedly mounted on the top of the frame 21. The first clamping plate 25 and the second clamping plate 26 are vertically aligned. Fluid interfaces 251 are fixedly connected to both sides of the first clamping plate 25 and the second clamping plate 26. Both the first clamping plate 25 and the second clamping plate 26 have internal flow channels 252. The fluid interface 251 is connected to the inner cavity of the internal flow channel 252. By using a constant temperature circulation machine 3 to control the temperature of the first clamping plate 25 and the second clamping plate 26, the membrane electrode can be uniformly heated or cooled, resulting in high heat transfer efficiency and ensuring thermal field uniformity and shaping stability. By using an electric linear module 22 and a pressure sensor 24 to control the downward pressing of the first clamping plate 25, replacing the traditional screw locking, the clamping force can be monitored and adjusted in real time, completely avoiding local stress concentration. Warpage and wrinkles achieve reversible plastic recovery under the synergistic effect of heat and force, significantly improving stress relief efficiency and shaping accuracy, thereby increasing the pass rate of deformed membrane electrode repair and greatly reducing the scrap cost of core components. The constant temperature circulation machine 3 is an existing device with heating and cooling functions. The medium in its storage tank can be heated to a maximum of 120°C or cooled to a minimum of -20°C inside the machine. It also has a pumping function. The working end of the constant temperature circulation machine 3 is connected to the fluid interface 251 through a hose. When the constant temperature circulation machine 3 is running, the liquid can flow through the internal flow channel 252 to treat the first... The temperature of the first clamping plate 25 and the second clamping plate 26 is controlled. The control system of the control device 4 adopts a PLC. Its touch screen can be used to set and display process parameters such as temperature, pressure, and time, and execute preset repair programs. For example, the membrane electrode to be repaired is placed on the second clamping plate 26. The operator selects a preset repair program such as "standard repair mode" on the touch screen. The program parameters are: initial clamping force 100N, preheating temperature 40℃ / 2 minutes, shaping temperature 85℃ / pressure 0.8MPa / 20 minutes, cooling temperature 15℃ / 10 minutes.

[0042] As one implementation method in this embodiment, such as Figure 1 , Figure 4As shown, a frame-shaped groove 254 is provided at the bottom of the first clamping plate 25, and a frame-shaped component 255 is fixedly installed at the bottom of the inner wall of the frame-shaped groove 254. A humidification interface 253 is fixedly connected to the side of the first clamping plate 25. A membrane electrode mating groove 257 is provided at the bottom of the first clamping plate 25, and a micro humidification hole 256 is provided on the inner wall of the membrane electrode mating groove 257. The inner cavities of the humidification interface 253, the frame-shaped groove 254 and the micro humidification hole 256 are connected. The diameter of the micro humidification hole 256 is 0.1 mm, and the spacing of the micro humidification holes 256 is 5 mm. When the water tank 5, the air supply component 6, the water supply component 7 and the moisture output component 8 are running as a whole, moisture can be output. The moisture will enter from the humidification interface 253, then enter the inner cavity of the frame-shaped groove 254, and then pass through the micro humidification hole 256 and be sprayed onto the membrane electrode to realize the function of humidifying the membrane electrode.

[0043] As one implementation method in this embodiment, such as Figure 7 As shown, a support leg 51 is fixedly installed at the bottom of the water tank 5, and the support leg 51 is fixedly installed at the top of the base 1. An ultrasonic atomizer 52 is fixedly installed at the bottom of the inner wall of the water tank 5. An air inlet 53 is opened on one side of the water tank 5, and an exhaust vent 54 is opened on the other side of the water tank 5. Deionized water is reserved inside the water tank 5. The ultrasonic atomizer 52 is immersed in the deionized water. By controlling the ultrasonic atomizer 52 to work, water mist can be generated in the inner cavity of the water tank 5. Gas can enter from the air inlet 53 and then exit from the exhaust vent 54, carrying away the water mist and implementing the humidification function.

[0044] As one implementation method in this embodiment, such as Figure 6 As shown, the air supply assembly 6 includes a support 61, which is fixedly installed on the side of the water tank 5. A rubber shock-absorbing pad 62 is fixedly installed on the top of the support 61, and a miniature air pump 63 is fixedly installed on the top of the rubber shock-absorbing pad 62. The output end of the miniature air pump 63 is fixedly connected to the side of the water tank 5, and the input end of the miniature air pump 63 is fixedly connected to a flange seat 64. An air filter cartridge 65 is detachably connected to the side of the flange seat 64 away from the miniature air pump 63. By controlling the operation of the miniature air pump 63, it can absorb outside air and then deliver it to the inner cavity of the water tank 5 to remove water mist for humidification. The air filter cartridge 65 is designed to filter the air absorbed by the miniature air pump 63, ensuring the unobstructed flow of subsequent channels. The air filter cartridge 65 is bolted to the flange seat 64, allowing users to disassemble and clean it. The support 61 is designed to support the miniature air pump 63 on the side of the water tank 5. The rubber shock-absorbing pad 62 is designed to isolate the vibration generated by the operation of the miniature air pump 63, preventing the vibration from being transmitted to the water tank 5 and thus affecting the operation of the ultrasonic atomizer 52, thereby ensuring the stability of the ultrasonic atomizer 52.

[0045] As one implementation method in this embodiment, such as Figure 8 As shown, the water supply assembly 7 includes a water supply pipe 71, which is fixedly installed on the top of the water tank 5 and extends to the inner cavity of the water tank 5. A water supply valve 72 is fixedly connected to the top of the water supply pipe 71. A plug 73 is movably inserted into the top of the water supply valve 72. A water storage tank 74 is fixedly connected to the top of the plug 73. A top cover 75 is threadedly connected to the top of the water storage tank 74. A raised frame 76 is fixedly installed on the top of the top cover 75. A dustproof net 77 is fixedly installed on the inner wall of the top cover 75. In use, the plug 73 is inserted into the top of the water supply valve 72, and the top cover 75 is removed from the top of the water storage tank 74. Deionized water can be pre-stored in the inner cavity of the water storage tank 74. Then, the water supply valve 72 is adjusted to the open state, and water can be supplied to the inner cavity of the water tank 5 through the water supply pipe 71. When water is supplied, outside air can enter through the dustproof net 77. The design of the dustproof net 77 avoids the problem of outside air carrying dust into the interior of the water storage tank 74. The design of the raised frame 76 can wrap and protect the dustproof net 77, while blocking vertically falling dust. The air entering the interior of the water tank 5 can be divided into two streams by the obstruction of the water supply pipe 71, so that the air can fully carry water mist and carry out humidification.

[0046] As one implementation method in this embodiment, such as Figure 9 As shown, a collar 711 is fixedly sleeved on the outer wall of the water supply pipe 71, and a slide rod 712 is slidably connected to the inner wall of the collar 711. A stopper 713 is fixedly installed at the bottom of the slide rod 712. The stopper 713 is movably inserted into the bottom of the water supply pipe 71, and a float 714 is fixedly installed at the bottom of the stopper 713. Both the float 714 and the stopper 713 have buoyancy. When the water level inside the water tank 5 rises, the stopper 713 and the float 714 will slide upwards by means of the connection between the slide rod 712 and the collar 711, sealing the bottom of the water supply pipe 71 and pausing the water supply. When deionized water is gradually used, the water level drops, and the stopper 713 will move down, releasing the sealing state of the bottom of the water supply pipe 71 and continuing the water supply. This can maintain the water level inside the water tank 5 in a suitable range, so that the ultrasonic atomizer 52 can operate stably.

[0047] As one implementation method in this embodiment, such as Figure 11As shown, the moisture output assembly 8 includes an L-shaped tube 81, which is fixedly connected to the side of the water tank 5. An output hose 82 is threadedly connected to the top of the L-shaped tube 81. An inner partition 87 is fixedly installed on the inner wall of the L-shaped tube 81. A rubber cylinder 871 is fixedly connected to the bottom of the inner partition 87. An alloy cylinder 872 is fixedly connected to the bottom of the rubber cylinder 871. A cylindrical filter screen 873 is fixedly connected to the bottom of the alloy cylinder 872. An elastic element 874 is fixedly installed at the bottom of the inner wall of the L-shaped tube 81, and the top of the elastic element 874 is fixedly connected to the bottom of the cylindrical filter screen 873. Large-diameter water mist easily accumulates in the flow channel, forming liquid water blockage and easily generating local overhydration. Local overhydration causes uneven expansion of the proton exchange membrane, generating internal stress, accelerating membrane cracking, pinhole formation and chemical degradation, and shortening service life. The moisture inside the water tank 5 will pass through the L-shaped tube 81, the output hose 82 and the humidification interface 253 into the interior of the first clamping plate 25. The moisture will move through the cylindrical filter screen 873. The cylindrical filter screen 873 can filter out the large-diameter water mist inside the moisture, ensuring the smoothness of the subsequent flow channel, and at the same time increasing the safety of the membrane electrode.

[0048] As one implementation method in this embodiment, such as Figure 11 , Figure 12 As shown, an inner guide plate 88 is fixedly installed on the inner wall of the L-shaped tube 81. A circular through-slot 881 is provided on the inner guide plate 88. A bracket 882 is fixedly installed on the inner wall of the circular through-slot 881. A rotating shaft 883 is rotatably connected to the inner wall of the bracket 882. A blade 884 located in the inner cavity of the circular through-slot 881 is fixedly installed on the outer wall of the rotating shaft 883. A rotating arm 885 is fixedly installed on the top of the rotating shaft 883. A rotating wheel 886 is rotatably connected to the end of the rotating arm 885. A cylindrical filter screen 873 is elastically connected to the inner partition 87 via a rubber sleeve 871. At the bottom, the elastic element 874 provides elastic support for the cylindrical filter screen 873 at the bottom of the inner wall of the L-shaped tube 81. When the moisture flows through the inner cavity of the L-shaped tube 81, it will flow through the inner cavity of the circular groove 881. The axial thrust of the gas will drive the blade 884 to rotate, and drive the rotating arm 885 to rotate through the rotating shaft 883. During the rotation of the rotating arm 885, its end can intermittently knock the cylindrical filter screen 873, causing the large-diameter water mist intercepted by the cylindrical filter screen 873 to fall to the bottom of the inner cavity of the L-shaped tube 81, ensuring the unobstructed flow of the cylindrical filter screen 873.

[0049] As one implementation method in this embodiment, such as Figure 10 , Figure 11As shown, valve 1 83 is fixedly connected to the bottom of L-shaped tube 81, water tank 84 is fixedly connected to the bottom of valve 1 83, valve 2 85 is fixedly connected to the bottom of water tank 84, and threaded cap 86 is threadedly connected to the bottom of L-shaped tube 81. In the initial state, valve 1 83 is open, and water shaken off from the cylindrical filter screen 873 will pass through valve 1 83 and enter the interior of water tank 84 for storage. During maintenance, valve 1 83 is closed, and then valve 2 85 is opened, which allows this part of the water to be discharged. Inside L-shaped tube 81, water may also accumulate on the other side of the inner drain plate 88. During maintenance, threaded cap 86 can be rotated off from the bottom of L-shaped tube 81 to discharge this part of the accumulated water.

[0050] Example 2

[0051] Please see Figures 1-12 This invention provides a technical solution: a method for reshaping and repairing a PEM electrolytic cell membrane electrode, comprising the following steps:

[0052] S1. Clamping: The membrane electrode to be repaired is placed on top of the second clamping plate 26. The program is started, and the electric linear module 22 drives the first clamping plate 25 to descend. When the pressure sensor 24 detects that the pressure reaches 100N, it stops and the membrane electrode is gently clamped.

[0053] S2. Coordinated humidification and preheating: The micro air pump 63 and ultrasonic atomizer 52 are started, and the atomized water vapor is evenly sprayed out from the micro humidification hole 256 of the first clamping plate 25 to wet the membrane electrode below. At the same time, the constant temperature circulation machine 3 works to pump 40°C hot water into the internal flow channel 252 of the first clamping plate 25 and the second clamping plate 26 to raise the temperature and stabilize it at 40°C for 2 minutes.

[0054] S3, Heating and Pressurizing Shaping: After 2 minutes, the control device 4 turns off the micro air pump 63 and the ultrasonic atomizer 52, and switches the constant temperature circulation machine 3 to a high temperature medium of 85°C. The temperature of the first clamping plate 25 and the second clamping plate 26 rises rapidly to 85°C. At the same time, the control device 4 instructs the electric linear module 22 to continue to apply thrust until the pressure sensor 24 reading reaches the corresponding 0.8MPa, and maintains this state precisely for 20 minutes.

[0055] S4. Cooling and Shaping: After 20 minutes, the constant temperature circulation machine 3 switches to a cooling medium of 15°C. The first clamping plate 25 and the second clamping plate 26 begin to cool down. During this process, the control system maintains a constant pressure of 0.8MPa (calculated based on the area of ​​the membrane electrode frame). After about 5 minutes, the temperature drops to 15°C and continues to maintain this low temperature and low pressure state for 5 minutes. The total cooling time is 10 minutes.

[0056] S5. Unloading: The program ends and the electric linear module 22 drives the first clamping plate 25 to rise, removing the repaired membrane electrode.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A device for shaping and repairing membrane electrodes in a PEM electrolytic cell, characterized in that: The device includes a base (1), a repair mechanism (2) is provided on the top of the base (1), a constant temperature circulation machine (3) and a control device (4) are fixedly installed on the top of the base (1), a water tank (5) is provided on the top of the base (1), and an air supply component (6), a water supply component (7) and a moisture output component (8) are provided on the water tank (5). The repair mechanism (2) is used to apply pressure to shape the membrane electrode, the constant temperature circulation machine (3) is used to control the temperature of the pressing end of the repair mechanism (2), and the water tank (5), air supply component (6), water supply component (7) and moisture output component (8) are used to humidify the membrane electrode. The repair mechanism (2) includes a frame (21), which is fixedly installed on the top of the base (1). An electric linear module (22) is fixedly installed on the outer wall of the frame (21). A lifting arm (23) is fixedly installed on the lifting end of the electric linear module (22). A pressure sensor (24) is fixedly installed at the bottom of the lifting arm (23). A first clamping plate (25) is fixedly installed at the bottom of the pressure sensor (24). A second clamping plate (26) is fixedly installed on the top of the frame (21). The first clamping plate (25) and the second clamping plate (26) are directly opposite each other. Fluid interfaces (251) are fixedly connected to both sides of the first clamping plate (25) and the second clamping plate (26). An internal flow channel (252) is opened inside the first clamping plate (25) and the second clamping plate (26). The fluid interface (251) and the inner cavity of the internal flow channel (252) are connected.

2. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 1, characterized in that: The bottom of the first clamping plate (25) is provided with a frame-shaped groove (254), and a frame-shaped component (255) is fixedly installed on the bottom of the inner wall of the frame-shaped groove (254). A humidification interface (253) is fixedly connected to the side of the first clamping plate (25). A membrane electrode mating groove (257) is provided at the bottom of the first clamping plate (25). A micro humidification hole (256) is provided on the inner wall of the membrane electrode mating groove (257). The inner cavity of the humidification interface (253), the frame-shaped groove (254) and the micro humidification hole (256) are connected. The diameter of the micro humidification hole (256) is 0.1 mm, and the spacing of the micro humidification holes (256) is 5 mm.

3. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 1, characterized in that: The bottom of the water tank (5) is fixedly installed with a support leg (51), the support leg (51) is fixedly installed on the top of the base (1), the bottom of the inner wall of the water tank (5) is fixedly installed with an ultrasonic atomizer (52), an air inlet (53) is opened on one side of the water tank (5), and an exhaust hole (54) is opened on the other side of the water tank (5).

4. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 3, characterized in that: The air supply assembly (6) includes a support (61), which is fixedly installed on the side of the water tank (5). A rubber shock-absorbing pad (62) is fixedly installed on the top of the support (61). A miniature air pump (63) is fixedly installed on the top of the rubber shock-absorbing pad (62). The output end of the miniature air pump (63) is fixedly connected to the side of the water tank (5). A flange seat (64) is fixedly connected to the input end of the miniature air pump (63). An air filter cartridge (65) is detachably connected to the side of the flange seat (64) away from the miniature air pump (63).

5. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 3, characterized in that: The water supply assembly (7) includes a water supply pipe (71), which is fixedly installed on the top of the water tank (5) and extends to the inner cavity of the water tank (5). A water supply valve (72) is fixedly connected to the top of the water supply pipe (71). A plug (73) is movably inserted into the top of the water supply valve (72). A water storage tank (74) is fixedly connected to the top of the plug (73). A top cover (75) is threadedly connected to the top of the water storage tank (74). A raised frame (76) is fixedly installed on the top of the top cover (75). A dustproof net (77) is fixedly installed on the inner wall of the top cover (75).

6. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 5, characterized in that: A collar (711) is fixedly sleeved on the outer wall of the water supply pipe (71), and a slide rod (712) is slidably connected on the inner wall of the collar (711). A plug (713) is fixedly installed at the bottom of the slide rod (712), and the plug (713) is movably inserted into the bottom of the water supply pipe (71). A float (714) is fixedly installed at the bottom of the plug (713).

7. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 3, characterized in that: The moisture output assembly (8) includes an L-shaped tube (81) which is fixedly connected to the side of the water tank (5). The top of the L-shaped tube (81) is threaded with an output hose (82). An inner partition (87) is fixedly installed on the inner wall of the L-shaped tube (81). A rubber cylinder (871) is fixedly connected to the bottom of the inner partition (87). An alloy cylinder (872) is fixedly connected to the bottom of the rubber cylinder (871). A cylindrical filter screen (873) is fixedly connected to the bottom of the alloy cylinder (872). An elastic element (874) is fixedly installed at the bottom of the inner wall of the L-shaped tube (81). The top of the elastic element (874) is fixedly connected to the bottom of the cylindrical filter screen (873).

8. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 7, characterized in that: A drainage inner plate (88) is fixedly installed on the inner wall of the L-shaped tube (81). A circular through groove (881) is provided on the drainage inner plate (88). A bracket (882) is fixedly installed on the inner wall of the circular through groove (881). A rotating shaft (883) is rotatably connected to the inner wall of the bracket (882). A blade (884) located in the inner cavity of the circular through groove (881) is fixedly installed on the outer wall of the rotating shaft (883). A rotating arm (885) is fixedly installed on the top of the rotating shaft (883). A rotating wheel (886) is rotatably connected to the end of the rotating arm (885).

9. The device for shaping and repairing PEM electrolytic cell membrane electrodes according to claim 8, characterized in that: The bottom of the L-shaped tube (81) is fixedly connected to a valve one (83), the bottom of the valve one (83) is fixedly connected to a water storage tank (84), the bottom of the water storage tank (84) is fixedly connected to a valve two (85), and the bottom of the L-shaped tube (81) is threadedly connected to a threaded cap (86).

10. A method for reshaping and repairing a PEM electrolytic cell membrane electrode according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Clamping: The membrane electrode to be repaired is placed on top of the second clamping plate (26). The program is started and the electric linear module (22) drives the first clamping plate (25) to descend. When the pressure sensor (24) detects that the pressure reaches 100N, it stops and the membrane electrode is gently clamped. S2, Coordinated humidification and preheating: The micro air pump (63) and ultrasonic atomizer (52) are started, and the atomized water vapor is evenly sprayed out from the micro humidification hole (256) of the first clamping plate (25) to wet the membrane electrode below. At the same time, the constant temperature circulation machine (3) works to pump 40°C hot water into the internal flow channel (252) of the first clamping plate (25) and the second clamping plate (26) to raise the temperature and stabilize it at 40°C for 2 minutes. S3, Heating and Pressurizing Shaping: After 2 minutes, the control device (4) turns off the micro air pump (63) and ultrasonic atomizer (52), and switches the constant temperature circulation machine (3) to a high temperature medium of 85°C. The temperature of the first clamping plate (25) and the second clamping plate (26) rises rapidly to 85°C. At the same time, the control device (4) instructs the electric linear module (22) to continue to apply thrust until the pressure sensor (24) reading reaches the corresponding 0.8MPa, and maintains this state precisely for 20 minutes. S4. Cooling and shaping: After 20 minutes, the constant temperature circulation machine (3) switches to a cooling medium of 15°C. The first clamping plate (25) and the second clamping plate (26) begin to cool down. During this process, the control system maintains a pressure of 0.8MPa. After about 5 minutes, the temperature drops to 15°C and continues to maintain this low temperature and low pressure state for 5 minutes. The total cooling time is 10 minutes. S5. Unloading: The program ends and the electric linear module (22) drives the first clamping plate (25) to rise and remove the repaired membrane electrode.

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