A membrane electrode preparation device

Abstract

The present invention discloses a membrane electrode preparation device, which relates to the technical fields of fuel cells and hydrogen production by electrolyzing water. The device includes a housing and an intermediate membrane conveying mechanism, a first pressing roller assembly, and a second pressing roller assembly arranged inside the housing. The intermediate membrane conveying mechanism is used for conveying a proton exchange membrane. The first pressing roller assembly and the second pressing roller assembly are respectively disposed on both sides of the intermediate membrane conveying mechanism. The central axes of the first pressing roller assembly and the second pressing roller assembly are slidably connected to the inside of the housing, and can approach or move away from the proton exchange membrane along a direction perpendicular to the conveying direction of the proton exchange membrane, and can rotate around their own axes. The two ends of a first telescopic rod are respectively connected to the side part of a catalytic layer laminate and the central axis, and the two ends of a second telescopic rod are respectively connected to the side part of a frame pressing plate and the central axis. Among them, the central axes of the first pressing roller assembly and the second pressing roller assembly can rotate in opposite directions. The present invention can prepare membrane electrodes of different specifications and sizes.

Description

Technical Field

[0001] The present invention relates to the technical fields of fuel cells and hydrogen production by electrolyzing water, and particularly relates to a membrane electrode preparation device. Background Art

[0002] A membrane electrode (Membrane Electrode Assemblies, MEA) is a site for multiphase mass transfer and electrochemical reactions in fuel cells and electrolyzers, and its performance determines the working performance, lifespan, and cost of fuel cells or electrolyzers. Currently, the membrane electrodes that are widely used mainly consist of an anode side frame, a cathode side frame, a proton exchange membrane, an anode catalyst layer, and a cathode catalyst layer. The anode catalyst layer and the cathode catalyst layer are attached to both sides of the proton exchange membrane, and the anode side frame and the cathode side frame are attached to both sides of the proton exchange membrane that has already adhered to the anode catalyst layer and the cathode catalyst layer. Currently, the preparation method that is widely used for membrane electrodes is an integrated molding method. The use effect of the integrated molding membrane electrode preparation device is good, but there are few mature technologies. Moreover, the current integrated molding membrane electrode preparation device generally includes multiple pressing rollers, and every two adjacent pressing rollers press one layer structure of the membrane electrode. Due to the determined structure of the pressing rollers, each type of integrated molding membrane electrode preparation device can only be adapted to the preparation of membrane electrodes of one specification form. However, the models and sizes of fuel cells and electrolyzer stacks of current manufacturers are different, and membrane electrodes of multiple different sizes are required. The applicability of the existing integrated molding membrane electrode preparation device to membrane electrodes of multiple different sizes is very limited. Therefore, there is an urgent need for a membrane electrode preparation device to solve the existence of the above technical problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a membrane electrode preparation device to solve the problems existing in the above prior art and be able to prepare membrane electrodes of different specification sizes.

[0004] To achieve the above purpose, the present invention provides the following solution:

[0005] The present invention provides a membrane electrode preparation device, which includes a housing and an intermediate membrane conveying mechanism, a first pressing roller assembly, and a second pressing roller assembly arranged inside the housing. The intermediate membrane conveying mechanism is used to convey a proton exchange membrane. The first pressing roller assembly and the second pressing roller assembly are respectively disposed on both sides of the intermediate membrane conveying mechanism. The first pressing roller assembly and the second pressing roller assembly both include a central shaft, at least two catalyst laminate plates, and at least two frame pressing plates. A catalyst can be sprayed on the catalyst laminate plates, and a frame forming agent can be sprayed on the frame pressing plates. The central shaft can move closer to or away from the proton exchange membrane in a direction perpendicular to the conveying direction of the proton exchange membrane and can rotate around its own axis. The side of the catalyst laminate plate is connected to the central shaft through a first telescopic rod, and the first telescopic rod is detachably connected to the catalyst laminate plate. The side of the frame pressing plate is connected to the central shaft through a second telescopic rod, and the second telescopic rod is detachably connected to the frame pressing plate. The central shaft of the first pressing roller assembly and the central shaft of the second pressing roller assembly can rotate in opposite directions.

[0006] In some embodiments, it further includes a frame pressing roller assembly. The frame pressing roller assembly is disposed outside the intermediate membrane conveying mechanism and extends into the intermediate membrane conveying mechanism. The frame pressing roller assembly can press the left and right frames of the membrane electrode onto the proton exchange membrane.

[0007] In some embodiments, it further includes a catalyst spraying device and a frame forming agent spraying device. The catalyst spraying device and the frame forming agent spraying device are fixedly arranged inside the housing. The catalyst spraying device is used to spray a catalyst onto the surface of the catalyst laminate plate, and the frame forming agent spraying device is used to spray a frame forming agent onto the surface of the frame pressing plate.

[0008] In some embodiments, the nozzle of the catalyst spraying device can be arranged in contact with the catalyst laminate plate, and a position induction sensor is arranged at the end of the nozzle close to the catalyst laminate plate. The position induction sensor is used to sense whether the catalyst laminate plate reaches below the nozzle.

[0009] In some embodiments, the intermediate membrane conveying mechanism includes a first clamping plate and a second clamping plate arranged opposite to each other. At least a pair of first running wheels and second running wheels are arranged between the first clamping plate and the second clamping plate. The first running wheels and the second running wheels can rotate around their own axes, and the rotation directions of the first running wheels and the second running wheels are opposite. The proton exchange membrane is placed between the first running wheels and the second running wheels.

[0010] In some embodiments, a plurality of the first traveling wheels and the second traveling wheels are correspondingly arranged between the first clamping plate and the second clamping plate, and the first traveling wheels and the second traveling wheels are arranged at both ends of the clamping space between the first clamping plate and the second clamping plate.

[0011] In some embodiments, the frame pressing roller assembly includes a first frame pressing roller and a second frame pressing roller respectively arranged outside the first clamping plate and outside the second clamping plate. Two inlet openings are formed at the positions of the first clamping plate and the second clamping plate facing each other. The first inlet opening is for the frame to enter, and the second inlet opening is for the frame pressing roller assembly to enter. The frame pressing roller assembly is slidably connected to the inside of the housing, and can move closer to or away from the proton exchange membrane along a direction perpendicular to the proton exchange membrane conveying direction, and can rotate around its own axis, and the rotation directions of the first frame pressing roller and the second frame pressing roller are opposite.

[0012] In some embodiments, a frame guiding plate assembly is further included. The frame guiding plate assembly includes a first guiding plate and a second guiding plate. The first guiding plate and the second guiding plate are respectively inclined and arranged outside the first clamping plate and outside the second clamping plate. The first guiding plate gradually approaches the first clamping plate from the direction away from the frame pressing roller assembly to the direction close to the first frame pressing roller assembly, and the first guiding plate is attached to one end of the first inlet opening on the first clamping plate close to the first frame pressing roller. The second guiding plate gradually approaches the second clamping plate from the direction away from the frame pressing roller assembly to the direction close to the second frame pressing roller assembly, and the second guiding plate is attached to one end of the first inlet opening on the second clamping plate close to the second frame pressing roller.

[0013] In some embodiments, the ends of the first clamping plate and the second clamping plate are deflected from the inside to the outside.

[0014] In some embodiments, a temperature regulating device is further included, and the temperature regulating device is arranged inside the catalytic laminate, the frame pressing plate and the frame pressing roller assembly.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The membrane electrode preparation device provided by the present invention includes a housing and an intermediate membrane conveying mechanism, a first pressing roller assembly, and a second pressing roller assembly disposed inside the housing. The intermediate membrane conveying mechanism is used to convey a proton exchange membrane. The first pressing roller assembly and the second pressing roller assembly are respectively disposed on both sides of the intermediate membrane conveying mechanism. The first pressing roller assembly and the second pressing roller assembly are respectively used to press an anode catalyst layer and a cathode catalyst layer. The first pressing roller assembly and the second pressing roller assembly each include at least two first telescopic rods circumferentially distributed along the central axis, at least two second telescopic rods circumferentially distributed along the central axis, at least two catalyst layer pressing plates, and at least two frame pressing plates. The central axis is slidably connected to the inside of the housing and can move closer to or away from the proton exchange membrane perpendicular to the conveying direction of the proton exchange membrane and can rotate around its own axis. Both ends of the first telescopic rod are respectively connected to the side of the catalyst layer pressing plate and the central axis, and both ends of the second telescopic rod are respectively connected to the side of the frame pressing plate and the central axis. Among them, the rotation directions of the central axes of the first pressing roller assembly and the second pressing roller assembly are opposite, and the rotation directions of the first pressing roller assembly and the second pressing roller assembly are opposite, so that membrane electrodes of different specifications can be prepared. The first telescopic rod and the second telescopic rod can be telescoped, thereby driving the movement of the catalyst layer pressing plate and the frame pressing plate. Moreover, the first telescopic rod can apply a certain pressure to the catalyst layer pressing plate, and the second telescopic rod can apply a certain pressure to the frame pressing plate. In addition, the first telescopic rod is detachably connected to the catalyst layer pressing plate, and the second telescopic rod is detachably connected to the frame pressing plate. When it is necessary to change the specification of the membrane electrode, it is only necessary to control the first telescopic rod and the second telescopic rod to extend or retract a certain distance and change the specifications of the frame pressing plate and the catalyst layer pressing plate. When a membrane electrode with a shorter frame is required, the first telescopic rod can be controlled to retract a certain distance, and the second telescopic rod also retracts. And the frame pressing plate and the catalyst layer pressing plate with the required width are replaced according to the need. At the same time, the central axis slides closer to the proton exchange membrane. When a membrane electrode with a longer catalyst layer is required, there are two feasible methods. The first method is that the first telescopic rod can be controlled to retract a certain distance, and the second telescopic rod also retracts. The catalyst layer pressing plate with a longer length and a suitable arc is replaced. At the same time, a shorter frame pressing plate is used, and the central axis is controlled to move closer to the proton exchange membrane. And the number of the first telescopic rods and the second telescopic rods used can be increased or decreased according to the need. The second method is that the first telescopic rod and the second telescopic rod can be controlled to extend a certain distance. At the same time, the appropriate catalyst layer pressing plate and the frame pressing plate are replaced, and the central axis is moved in the direction away from the proton exchange membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the membrane electrode preparation device in the first embodiment of the present invention;

[0019] Figure 2 It is a front view of the membrane electrode preparation device in the first embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the first pressing roller assembly and the second pressing roller assembly in the first embodiment of the present invention;

[0021] Figure 4 It is a top view of the first pressing roller assembly and the second pressing roller assembly in the first embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the intermediate film conveying mechanism in the first embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the membrane electrode preparation device in the second embodiment of the present invention;

[0024] Figure 7 It is a front view of the membrane electrode preparation device in the second embodiment of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the first pressing roller assembly and the second pressing roller assembly in the second embodiment of the present invention;

[0026] Figure 9 It is a top view of the first pressing roller assembly and the second pressing roller assembly in the second embodiment of the present invention;

[0027] Figure 10 It is a schematic structural diagram of the intermediate film conveying mechanism in the second embodiment of the present invention;

[0028] Figure 11 It is a schematic structural diagram of the membrane electrode preparation device in the third embodiment of the present invention;

[0029] Figure 12 It is a front view of the membrane electrode preparation device in the third embodiment of the present invention;

[0030] Figure 13 It is a schematic structural diagram of the connection of multiple membrane electrode preparation devices in the fourth embodiment of the present invention.

[0031] In the figure: 1 - central axis; 2 - catalytic laminate; 3 - frame pressing plate; 4 - catalyst spraying device; 5 - intermediate film conveying mechanism; 51 - first clamping plate; 52 - second clamping plate; 53 - first traveling wheel; 54 - second traveling wheel; 55 - first guiding plate; 56 - second guiding plate; 57 - first frame pressing roller; 58 - second frame pressing roller; 6 - second telescopic rod; 7 - first telescopic rod. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] The purpose of the present invention is to provide a membrane electrode preparation device to solve the problems existing in the prior art and be able to prepare membrane electrodes of different specifications and sizes.

[0034] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Embodiment 1

[0035] As Figures 1 - 5As shown in the figure, the present invention provides a membrane electrode preparation device, which includes a housing and an intermediate membrane conveying mechanism 5, a first pressing roller assembly and a second pressing roller assembly arranged inside the housing. The intermediate membrane conveying mechanism 5 is used for conveying a proton exchange membrane. The first pressing roller assembly and the second pressing roller assembly are respectively arranged on both sides of the intermediate membrane conveying mechanism 5. The first pressing roller assembly and the second pressing roller assembly are respectively used for pressing an anode catalyst layer and a cathode catalyst layer. The first pressing roller assembly and the second pressing roller assembly are arranged on both sides of the intermediate membrane conveying mechanism 5. The first pressing roller assembly and the second pressing roller assembly both include at least two first telescopic rods 7 circumferentially distributed along the central axis 1, at least two second telescopic rods 6 circumferentially distributed along the central axis 1, at least two catalyst layer pressing plates 2 and at least two frame pressing plates 3. The central axis 1 is slidably connected inside the housing and can move closer to or away from the proton exchange membrane along a direction perpendicular to the conveying direction of the proton exchange membrane and can rotate around its own axis. A catalyst can be sprayed on the catalyst layer pressing plate, and a frame forming agent can be sprayed on the frame pressing plate. Both ends of the first telescopic rod 7 are respectively connected to the side part of the catalyst layer pressing plate 2 and the central axis 1, and the first telescopic rod 7 is detachably connected to the catalyst layer pressing plate 2, specifically, it can be a plug-in connection. Both ends of the second telescopic rod 6 are respectively connected to the side part of the frame pressing plate 3 and the central axis 1, and the second telescopic rod 6 is detachably connected to the frame pressing plate, specifically, it can be a plug-in connection. The central axis 1 of the first pressing roller assembly and the central axis 1 of the second pressing roller assembly can rotate in opposite directions. The rotation directions of the first pressing roller assembly and the second pressing roller assembly are opposite. The first telescopic rod 7 and the second telescopic rod 6 can be telescopic, thereby driving the movement of the catalyst layer pressing plate 2 and the frame pressing plate 3. Moreover, the first telescopic rod 7 can apply a certain pressure to the catalyst layer pressing plate 2, and the second telescopic rod 6 can apply a certain pressure to the frame pressing plate 3. And both the first telescopic rod 7 and the catalyst layer pressing plate 2 and the second telescopic rod 6 and the frame pressing plate 3 are detachably connected. When it is necessary to change the specifications of the membrane electrode, only need to control the first telescopic rod 7 and the second telescopic rod 6 to extend or retract a certain distance and change the specifications of the frame pressing plate 3 and the catalyst layer pressing plate 2. When a membrane electrode with a shorter frame is needed, the first telescopic rod 7 can be controlled to retract a certain distance, and the second telescopic rod 6 also retracts, and the frame pressing plate 3 and the catalyst layer pressing plate 2 with the required width are replaced according to the need. At the same time, the central axis 1 slides closer to the proton exchange membrane. When a membrane electrode with a longer catalyst layer is needed, there are two feasible methods. The first method is that the first telescopic rod 7 can be controlled to retract a certain distance, and the second telescopic rod 6 also retracts, replace the catalyst layer pressing plate 2 with a longer length and a suitable arc, and at the same time use a shorter frame pressing plate 3, and control the central axis 1 to move closer to the proton exchange membrane, and the number of the first telescopic rod 7 and the second telescopic rod 6 used can be increased or decreased according to the need. The second method is that the first telescopic rod 7 and the second telescopic rod 6 can be controlled to extend a certain distance at the same time, and at the same time replace the appropriate catalyst layer pressing plate 2 and frame pressing plate 3, and make the central axis 1 move in a direction away from the proton exchange membrane.

[0036] It should be noted that the central shaft 1 can slide relative to the housing and can also rotate relative to the housing, which can be achieved in the following way: a bearing and a connecting rod are provided. A slider is arranged inside the housing, and the slider is slidably connected to the housing. The outer ring of the bearing is fixedly connected to the slider, the inner ring of the bearing sleeved with the connecting rod is fixedly connected, and the end of the connecting rod away from the bearing is fixedly connected to the end face of the central shaft 1. Moreover, the first telescopic rod 7 is detachably connected to the catalytic laminate 2, and the second telescopic rod 6 is detachably connected to the frame laminate. The detachable connection here can be a plug-in connection or a threaded connection. However, in terms of installation space and convenience, the plug-in connection may be more applicable.

[0037] As a preferred embodiment, a plurality of jacks are arranged on the side of the central shaft 1 along the circumferential direction. A plurality of the first telescopic rods 7 and the second telescopic rods 6 are arranged along the circumferential direction of the central shaft 1. The plurality of first telescopic rods 7 and the second telescopic rods 6 can be inserted into the jacks, and a second telescopic rod 6 is arranged between any two of the first telescopic rods 7. The plurality of jacks provide various options for the layout of the telescopic rods. According to actual production requirements, the number of the first telescopic rods 7 and the second telescopic rods 6 and their distribution positions in the circumferential direction of the central shaft 1 can be flexibly changed to adapt to the preparation of membrane electrodes with different sizes, shapes or process requirements. When a membrane electrode with a longer length needs to be produced, the second telescopic rod 6 between two of the first telescopic rods 7 can be removed, and the first telescopic rods 7 are controlled to retract until two adjacent catalytic laminates 2 are in contact. Moreover, for membrane electrodes of different sizes, catalytic laminates 2 and frame laminates 3 with different widths are used. The convenient installation and disassembly of the first telescopic rods 7 and the second telescopic rods 6 make the replacement of the catalytic laminates 2 and the frame laminates 3 more convenient.

[0038] In some embodiments, the membrane electrode preparation device further includes a catalyst spraying device 4. The catalyst spraying device 4 is fixedly arranged inside the housing and is used for spraying catalyst onto the surface of the catalytic laminate 2. One catalyst spraying device 4 is arranged on each side of the intermediate film conveying mechanism 5. One is used for spraying anode catalyst, and the other is used for spraying cathode catalyst.

[0039] In some embodiments, the nozzle of the catalyst spraying device can be arranged in contact with the catalytic laminate, and a position sensing sensor is arranged at the end of the nozzle close to the catalytic laminate. The contact sensor is used to sense whether the catalytic laminate reaches below the nozzle. Preferably, the nozzle of the catalyst spraying device 4 can be arranged in contact with the catalytic laminate 2, and a contact sensor is arranged at the end of the nozzle close to the catalytic laminate 2. The contact sensor is used to sense whether the nozzle contacts the catalytic laminate 2. The contact sensor and the controller of the nozzle are commonly connected to a control system. The contact sensor transmits the electrical signal of sensing whether the nozzle contacts the catalytic laminate 2 to the control system. The control system controls the opening and closing of the nozzle according to this signal. When the nozzle contacts the catalytic laminate 2, the nozzle starts to spray the catalyst. When the nozzle does not contact the catalytic laminate 2, the spraying of the catalyst stops, which can ensure the accurate spraying of the catalyst, good spraying effect, and reduce waste.

[0040] It should be noted that there can be various settings and selections for the nozzle and the sensor. For example, the nozzle does not contact the catalytic laminate 2 but is at a certain distance from the catalytic laminate 2. At this time, a laser sensor or an ultrasonic sensor is selected as the sensor. The laser sensor or the ultrasonic sensor is used to sense whether the catalytic laminate 2 reaches the spraying position. When it is sensed that the catalytic laminate 2 has reached the spraying position, the nozzle starts to spray the catalyst.

[0041] In some embodiments, the intermediate film conveying mechanism 5 includes a first clamping plate 51 and a second clamping plate 52 arranged opposite to each other. At least a first traveling wheel 53 and a second traveling wheel 54 are arranged opposite to each other between the first clamping plate 51 and the second clamping plate 52. The first traveling wheel 53 and the second traveling wheel 54 can rotate around their own axes, and the first traveling wheel 53 and the second traveling wheel 54 can rotate in opposite directions. The proton exchange membrane is arranged between the first traveling wheel 53 and the second traveling wheel 54. The relatively arranged first clamping plate 51 and second clamping plate 52 can provide a certain clamping force on the proton exchange membrane from both sides, ensuring that the proton exchange membrane does not sway or shift left and right during the conveying process and maintaining its accurate position on the conveying path, which is beneficial to the accurate lamination with the catalytic layer subsequently and improves the precision of membrane electrode preparation. The first traveling wheel 53 and the second traveling wheel 54 are arranged opposite to each other and rotate in opposite directions, forming an opposing driving force, which can uniformly drive the proton exchange membrane forward, effectively avoiding problems such as distortion and wrinkles of the proton exchange membrane that may be caused by single-sided driving, ensuring the flatness of the proton exchange membrane during the conveying process, and providing a guarantee for the preparation of high-quality membrane electrodes.

[0042] In some embodiments, a plurality of first traveling wheels 53 and second traveling wheels 54 are correspondingly arranged between the first clamping plate 51 and the second clamping plate 52, and first traveling wheels 53 and second traveling wheels 54 are arranged at both ends of the clamping space between the first clamping plate 51 and the second clamping plate 52. The plurality of correspondingly arranged traveling wheels form a multi-point support for the proton exchange membrane, reducing the sagging or shaking of the membrane during transportation. Especially for proton exchange membranes with larger sizes or softer textures, the multi-point support can effectively disperse their own weight and the external forces received, ensuring that the proton exchange membrane always remains flat, preventing wrinkles or twists, and improving the quality stability of membrane electrode preparation. Arranging the first traveling wheels 53 and the second traveling wheels 54 at the ends of the clamping space enhances the transportation stability of the starting end and the ending end of the proton exchange membrane, helping to prevent the proton exchange membrane from shifting due to uneven force at the beginning and end of transportation, and ensuring the smoothness and accuracy of the entire transportation process.

[0043] In some embodiments, the intermediate membrane conveying mechanism 5 further includes a frame pressing roller assembly. Two inlet openings are provided at the opposite positions of the first clamping plate 51 and the second clamping plate 52. The first inlet opening is for the frame to enter, and the second inlet opening is for the frame pressing roller assembly to enter. The frame pressing roller assembly includes a first frame pressing roller 57 and a second frame pressing roller 58 respectively arranged outside the first clamping plate 51 and outside the second clamping plate 52. The frame pressing roller assembly is slidably connected to the inside of the housing and can approach or move away from the proton exchange membrane along a direction perpendicular to the transportation direction of the proton exchange membrane, and can rotate around its own axis, and the rotation directions of the first frame pressing roller 57 and the second frame pressing roller 58 are opposite. Providing the inlet openings at the opposite positions of the first clamping plate 51 and the second clamping plate 52 enables the frame to enter through a dedicated inlet opening and be precisely corresponding to the frame pressing roller assembly, ensuring the accurate position of the frame during the pressing process, enabling it to be precisely combined with the proton exchange membrane, improving the precision of frame pressing of the membrane electrode, and avoiding problems such as poor combination of the frame and the membrane body caused by position deviation. The first frame pressing roller 57 and the second frame pressing roller 58 respectively arranged outside the first clamping plate 51 and outside the second clamping plate 52, and with opposite rotation directions, can press the frame from both sides simultaneously. The bilateral synchronous pressing method ensures uniform force on the frame, tight pressing, effectively improves the fitting degree between the frame and the proton exchange membrane, and enhances the stability of the overall structure of the membrane electrode. The frame pressing roller assembly can approach or move away from the proton exchange membrane along a direction perpendicular to the transportation direction of the proton exchange membrane, enabling the device to flexibly adjust the pressing distance according to the specifications such as the thickness and width of the frames of different membrane electrode products. Whether it is a thicker frame that requires a larger pressure and distance, or a thinner frame that requires precise control of the pressing force, it can be satisfied by adjusting the position of the frame pressing roller assembly, improving the versatility of the device. The specific method for setting the rotation and sliding of the frame pressing roller assembly can be similar to the setting method of the central shaft 1.

[0044] In some embodiments, the intermediate film conveying mechanism 5 further includes a frame guiding plate assembly. The frame guiding plate assembly includes a first guiding plate 55 and a second guiding plate 56. The first guiding plate 55 and the second guiding plate 56 are respectively inclined and arranged outside the first clamping plate 51 and the second clamping plate 52. The first guiding plate gradually approaches the first clamping plate from the direction away from the frame pressing roller assembly to the direction close to the first frame pressing roller, and the first guiding plate is attached to one end of the first inlet on the first clamping plate close to the first frame pressing roller. The second guiding plate gradually approaches the second clamping plate from the direction away from the frame pressing roller assembly to the direction close to the second frame pressing roller, and the second guiding plate is attached to one end of the first inlet on the second clamping plate close to the second frame pressing roller. Preferably, the first guiding plate 55 and the second guiding plate 56 are joined together to form a flared shape, and the open end is in the same direction as the conveying direction of the proton exchange membrane. The first guiding plate 55 and the second guiding plate 56 are joined together to form a flared shape, and the open end is in the same direction as the conveying direction of the proton exchange membrane, providing a clear and definite guiding path for the frame to enter the intermediate film conveying mechanism 5. The frame can accurately enter the first inlet along the guidance of the flared opening, corresponding precisely to the position of the proton exchange membrane, effectively avoiding the deviation or misalignment of the frame during the conveying process, improving the accuracy of the assembly of the frame and the proton exchange membrane, and further enhancing the production quality of the membrane electrode. The guiding plate in the shape of a flared opening has a relatively large opening range and has a certain tolerance for minor deviations in the initial position of the frame. Even if the position of the frame is slightly inaccurate during the initial placement, it can smoothly enter the first inlet under the action of the guiding plate, reducing production failures caused by the deviation of the frame position and improving the stability and reliability of the production process.

[0045] In some embodiments, the ends of the first clamping plate 51 and the second clamping plate 52 are deflected from the inside out, that is, from the side close to the proton exchange membrane to the side away from the proton exchange membrane. The outward deflection of the ends forms a shape similar to a flared opening, providing a guiding inlet for the proton exchange membrane. When placing the proton exchange membrane on the conveying mechanism, it is easier for the operator to align the membrane with the position between the first traveling wheel 53 and the second traveling wheel 54, reducing the placement difficulty, improving the positioning accuracy, and reducing the conveying failures caused by placement deviations.

[0046] In some embodiments, the membrane electrode preparation device further includes a temperature regulation device, which is disposed inside the catalyst laminate 2, the border pressing plate 3, and the border pressing roller assembly. By arranging the temperature regulation device in the catalyst laminate 2, the temperature during the lamination of the catalyst layer and the proton exchange membrane can be precisely controlled. An appropriate temperature can improve the activity and fluidity of the catalyst, enabling the catalyst layer and the proton exchange membrane to better fuse, enhancing the adhesion between the two, and thus improving the performance and stability of the membrane electrode. For example, for some catalysts that are sensitive to temperature, precise temperature control can ensure their combination with the proton exchange membrane at the optimal active temperature, improving the electrochemical reaction efficiency. The temperature regulation devices in the border pressing plate 3 and the border pressing roller assembly can keep the border material at an appropriate temperature during lamination. Some border materials have better plasticity and adhesiveness at specific temperatures. Through temperature regulation, the border can be closely attached to the proton exchange membrane, ensuring the overall airtightness and structural stability of the membrane electrode, and preventing problems such as gas leakage caused by loose bonding between the border and the membrane. Embodiment Two

[0047] As Figures 6 - 10 shown, different from the square catalyst laminate 2 in Embodiment One, the catalyst laminate 2 in this embodiment is circular. At the same time, the border pressing plate 3 also makes certain changes, and the cross-section corresponding to the catalyst laminate 2 also adopts a circular cross-section. The adjustment method is similar to that in Embodiment One. This embodiment can adapt to the case where the effective cross-section of the membrane electrode is circular. It should be noted that the membrane electrode preparation devices in Embodiment One and Embodiment Two are more suitable for preparing membrane electrodes with a changed catalyst layer length. Embodiment Three

[0048] As Figures 11 - 12 shown, different from the arc-shaped catalyst laminate 2 in Embodiment One and Embodiment Two, the catalyst laminate 2 in this embodiment is a flat plate. The border pressing plate 3 can adopt a flat plate or an arc-shaped plate. The adjustment method is similar to that in Embodiment One. This embodiment is more suitable for preparing membrane electrodes with a changed border length. Embodiment Four

[0049] As Figure 13As shown in the figure, a first pressing roller assembly and a second pressing roller assembly are respectively arranged on both sides of the intermediate film conveying mechanism 5 of this embodiment. Another intermediate film conveying mechanism 5 can also be arranged on the side of the second pressing roller assembly different from the intermediate film conveying mechanism 5. At the same time, a third pressing roller assembly can also be arranged on the side of this intermediate film conveying mechanism 5 different from the second pressing roller assembly. The rotation direction of the third pressing roller assembly is the same as that of the first pressing roller assembly. Such a similar setting can make full use of each pressing roller assembly and improve production efficiency. It should be noted that multiple such repeating mechanisms can be set according to production needs and space conditions. Specific examples are used in the present invention to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A membrane electrode preparation device, characterized in that: It includes a shell and an intermediate membrane conveying mechanism, a first pressing roller assembly and a second pressing roller assembly arranged in the shell. The intermediate membrane conveying mechanism is used to convey a proton exchange membrane. The first pressing roller assembly and the second pressing roller assembly are respectively arranged on both sides of the intermediate membrane conveying mechanism. The first pressing roller assembly and the second pressing roller assembly both include a central axis, at least two catalytic laminates and at least two frame pressing plates. The catalytic laminates can be sprayed with a catalyst, and the frame pressing plates can be sprayed with a frame forming agent. The central axis can approach or move away from the proton exchange membrane along a direction perpendicular to the proton exchange membrane conveying direction and can rotate around its own axis. The catalytic laminates and the side of the central axis are connected by a first telescopic rod, and the first telescopic rod is detachably connected to the catalytic laminates. The frame pressing plates and the side of the central axis are connected by a second telescopic rod, and the second telescopic rod is detachably connected to the frame pressing plates. The central axis of the first pressing roller assembly and the central axis of the second pressing roller assembly can rotate in opposite directions.

2. The membrane electrode preparation device according to claim 1, characterized in that: It also includes a frame pressing roller assembly, which is arranged on the outside of the intermediate membrane conveying mechanism and extends into the intermediate membrane conveying mechanism. The frame pressing roller assembly can press the left frame and the right frame of the membrane electrode onto the proton exchange membrane.

3. The membrane electrode preparation device according to claim 1, characterized in that: It also includes a catalyst injection device and a frame forming agent injection device, which are fixedly arranged inside the shell. The catalyst injection device is used to inject catalyst onto the surface of the catalytic laminate, and the frame forming agent injection device is used to inject frame forming agent onto the surface of the frame pressure plate.

4. The membrane electrode preparation device according to claim 3, characterized in that: The nozzle of the catalyst injection device can be arranged in close contact with the catalytic laminate, and a position sensing sensor is arranged at the end of the nozzle close to the catalytic laminate, and the position sensing sensor is used to sense whether the catalytic laminate reaches below the nozzle.

5. The membrane electrode preparation device according to claim 2, characterized in that: The intermediate membrane conveying mechanism includes a first clamping plate and a second clamping plate arranged opposite to each other, and at least a first traveling wheel and a second traveling wheel are arranged opposite to each other between the first clamping plate and the second clamping plate. The first traveling wheel and the second traveling wheel can rotate around their own axes, and the rotation directions of the first traveling wheel and the second traveling wheel are opposite, and the proton exchange membrane is used to be placed between the first traveling wheel and the second traveling wheel.

6. The membrane electrode preparation device according to claim 5, characterized in that: A plurality of the first traveling wheels and the second traveling wheels are correspondingly arranged between the first clamping plate and the second clamping plate, and the first traveling wheels and the second traveling wheels are arranged at the ends of the clamping space of the first clamping plate and the second clamping plate.

7. The membrane electrode preparation device according to claim 5, characterized in that: The frame laminating roller assembly includes a first frame laminating roller and a second frame laminating roller respectively arranged on the outer side of the first clamping plate and the outer side of the second clamping plate. Two entrances are provided at relative positions of the first clamping plate and the second clamping plate. The first entrance is used for allowing the frame to enter, and the second entrance is used for allowing the frame laminating roller assembly to enter. The frame laminating roller assembly is slidably connected to the interior of the shell, and can approach or move away from the proton exchange membrane in a direction perpendicular to the transport direction of the proton exchange membrane, and can rotate around its own axis, and the rotation directions of the first frame laminating roller and the second frame laminating roller are opposite.

8. The membrane electrode manufacturing device according to claim 7, characterized in that: It also includes a frame guide plate assembly, which includes a first guide plate and a second guide plate, wherein the first guide plate and the second guide plate are respectively inclinedly arranged on the outer sides of the first clamping plate and the second clamping plate, and the first guide plate gradually approaches the first clamping plate from a direction away from the frame laminating roller assembly to a direction close to the first frame laminating roller, and the first guide plate is in contact with the first entrance on the first clamping plate near one end of the first frame laminating roller, and the second guide plate gradually approaches the second clamping plate from a direction away from the frame laminating roller assembly to a direction close to the second frame laminating roller, and the second guide plate is in contact with the first entrance on the second clamping plate near one end of the second frame laminating roller.

9. The membrane electrode manufacturing device according to claim 5, characterized in that: The ends of the first clamping plate and the second clamping plate are both deflected from inside to outside.

10. The membrane electrode manufacturing device according to claim 7, characterized in that: It also includes a temperature regulating device, which is arranged inside the catalytic laminate, the frame pressing plate and the frame pressing roller assembly.

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