Membrane electrode preparation device

Abstract

The invention discloses a membrane electrode preparation device, and relates to the technical field of fuel cells and water electrolysis hydrogen production, the membrane electrode preparation device comprises a shell, and an intermediate membrane conveying mechanism, a first pressing roller assembly and a second pressing roller assembly which are arranged in the shell, the intermediate membrane conveying mechanism is used for conveying a proton exchange membrane; the first press-fit roller assembly and the second press-fit roller assembly are arranged on the two sides of the middle membrane conveying mechanism in an attached mode respectively, center shafts of the first press-fit roller assembly and the second press-fit roller assembly are slidably connected to the interior of the shell, and the first press-fit roller assembly and the second press-fit roller assembly can be close to or away from the proton exchange membrane in the direction perpendicular to the proton exchange membrane conveying direction and can rotate around the axes of the first press-fit roller assembly and the second press-fit roller assembly. The two ends of the first telescopic rod are connected with the catalytic pressing plate and the side portion of the center shaft respectively, the two ends of the second telescopic rod are connected with the frame pressing plate and the side portion of the center shaft respectively, and the center shaft of the first pressing roller assembly and the center shaft of the second pressing roller assembly can rotate in the opposite directions. The method can be used for preparing membrane electrodes with different specifications and sizes.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells and hydrogen production by electrolysis of water, and in particular to a membrane electrode preparation device. Background Art

[0002] Membrane Electrode Assemblies (MEA) are the sites for multiphase material transfer and electrochemical reactions in fuel cells and electrolyzers. Their performance determines the working performance, life and cost of fuel cells or electrolyzers. The most widely used membrane electrode is mainly composed 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 the two sides of the proton exchange membrane, and the anode side frame and the cathode side frame are attached to the two sides of the proton exchange membrane to which the anode catalyst layer and the cathode catalyst layer are already attached. At present, the most widely used preparation method for membrane electrode is the integrated forming preparation method. The use effect of the integrated forming membrane electrode preparation device is good, but there are few mature technologies. In addition, the current integrated forming membrane electrode preparation device generally includes multiple pressing rollers, and each two adjacent pressing rollers press a layer of the membrane electrode structure. Due to the structure of the pressing rollers, each integrated forming membrane electrode preparation device can only adapt to the preparation of one specification of membrane electrode. However, the current manufacturers' fuel cells and electrolyzer stacks have different models and sizes, requiring membrane electrodes of various sizes. The existing integrated forming membrane electrode preparation device is very limited in its applicability to membrane electrodes of various sizes. Therefore, there is an urgent need for a membrane electrode preparation device to solve 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-mentioned prior art and to be able to prepare membrane electrodes of different specifications and sizes.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a membrane electrode preparation device, comprising a shell and an intermediate membrane conveying mechanism, a first pressing roller assembly and a second pressing roller assembly arranged in the shell, wherein 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 comprise a central axis, at least two catalytic laminates and at least two frame pressing plates, the catalytic laminates can be sprayed with a catalyst, 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 conveying direction of the proton exchange membrane, 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, wherein the central axis of the first pressing roller assembly and the central axis of the second pressing roller assembly can rotate in opposite directions.

[0005] In some embodiments, a frame pressing roller assembly is further included, wherein the frame pressing roller assembly is disposed on the outside of the intermediate membrane conveying mechanism and extends into the intermediate membrane conveying mechanism, and the frame pressing roller assembly can press the left frame and the right frame of the membrane electrode onto the proton exchange membrane.

[0006] In some embodiments, a catalyst injection device and a frame forming agent injection device are further included, and the catalyst injection device and the frame forming agent injection device 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.

[0007] In some embodiments, the nozzle of the catalyst injection device can be arranged in contact with the catalytic laminate, and a position sensing sensor is provided 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.

[0008] In some embodiments, the intermediate membrane conveying mechanism includes a first clamping plate and a second clamping plate that are 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.

[0009] 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 the ends of the clamping space of the first clamping plate and the second clamping plate.

[0010] In some embodiments, 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, and two entrances are opened 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 proton exchange membrane transport direction, 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.

[0011] In some embodiments, it also includes a frame guide plate assembly, which includes a first guide plate and a second guide plate, 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 assembly, 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 assembly, 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.

[0012] In some embodiments, ends of the first clamping plate and the second clamping plate are deflected from inside to outside.

[0013] In some embodiments, a temperature regulating device is further included, and the temperature regulating device is disposed inside the catalytic laminate, the frame pressing plate, and the frame pressing roller assembly.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The membrane electrode preparation device provided by the present invention comprises 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 the 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 are respectively used to press the anode catalyst layer and the cathode catalyst layer. The first pressing roller assembly and the second pressing roller assembly both comprise at least two first telescopic rods distributed circumferentially along the central axis, at least two second telescopic rods distributed circumferentially along the central axis, at least two catalytic laminates and at least two frame pressing plates. The central axis is slidably connected to the inside of the shell and can approach or move away from the proton exchange membrane in a direction perpendicular to the proton exchange membrane conveying direction and can rotate around its own axis. The two ends of the first telescopic rod are respectively connected to the catalytic laminate and the side of the central axis, and the two ends of the second telescopic rod are respectively connected to the side of the frame pressing plate and the side of the central axis. The central axis of the first pressing roller assembly rotates in the opposite direction to the central axis of the second pressing roller assembly, and the first pressing roller assembly and the second pressing roller assembly rotate in the opposite direction, so that different For a membrane electrode of a certain specification, the first telescopic rod and the second telescopic rod can be telescoped, thereby driving the catalytic laminate and the frame pressure plate to move, and the first telescopic rod can apply a certain pressure to the catalytic laminate, and the second telescopic rod can apply a certain pressure to the frame pressure plate, and the first telescopic rod and the catalytic laminate, and the second telescopic rod and the frame pressure plate are all detachably connected. 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 pressure plate and the catalytic laminate. 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 can also be retracted, and the frame pressure plate and the catalytic laminate of the required width can be replaced as needed, and the central axis slides close to the proton exchange membrane; when a membrane electrode with a longer catalytic layer is required, there are two feasible methods. The first is to control the first telescopic rod to retract a certain distance, and the second telescopic rod can also be retracted, and the catalytic laminate with a longer length and suitable curvature can be replaced, and a shorter frame pressure plate can be used at the same time, and the central axis can be controlled to move close to the proton exchange membrane, and the number of the first telescopic rod and the second telescopic rod used can be increased or decreased as needed. The second method is to control the first telescopic rod and the second telescopic rod to extend a certain distance, and at the same time replace a suitable catalyst laminate plate and frame pressing plate, and move the central axis in a direction away from the proton exchange membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a membrane electrode preparation device in Example 1 of the present invention; Figure 2 It is a front view of the membrane electrode preparation device in the first embodiment of the present invention; Figure 3 It is a schematic structural diagram of a first lamination roller assembly and a second lamination roller assembly in Embodiment 1 of the present invention; Figure 4 A top view of the first lamination roller assembly and the second lamination roller assembly in the first embodiment of the present invention; Figure 5 It is a structural schematic diagram of the intermediate film conveying mechanism in the first embodiment of the present invention; Figure 6 It is a structural schematic diagram of a membrane electrode preparation device in Embodiment 2 of the present invention; Figure 7 It is a front view of the membrane electrode preparation device in the second embodiment of the present invention; Figure 8 It is a schematic structural diagram of a first laminating roller assembly and a second laminating roller assembly in Embodiment 2 of the present invention; Fig. 9 A top view of the first laminating roller assembly and the second laminating roller assembly in the second embodiment of the present invention; Fig.10 It is a structural schematic diagram of the intermediate film conveying mechanism in the second embodiment of the present invention; Fig.11 This is a schematic diagram of the structure of a membrane electrode preparation device in Embodiment 3 of the present invention; Fig.12 It is a front view of the membrane electrode preparation device in the third embodiment of the present invention; Fig.13 This is a schematic diagram of the structure of connecting multiple membrane electrode preparation devices in Example 4 of the present invention.

[0017] In the figure: 1-central axis; 2-catalytic laminate; 3-frame pressure plate; 4-catalyst injection device; 5-intermediate film conveying mechanism; 51-first clamping plate; 52-second clamping plate; 53-first traveling wheel; 54-second traveling wheel; 55-first guide plate; 56-second guide plate; 57-first frame pressing roller; 58-second frame pressing roller; 6-second telescopic rod; 7-first telescopic rod. DETAILED DESCRIPTION

[0018] 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.

[0019] The purpose of the present invention is to provide a membrane electrode preparation device to solve the problems existing in the prior art and to be able to prepare membrane electrodes of different specifications and sizes.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment 1 like Figure 1-Figure 5As shown, the present invention provides a membrane electrode preparation device, including a shell and an intermediate membrane conveying mechanism 5, a first pressing roller assembly and a second pressing roller assembly arranged in the shell, the intermediate membrane conveying mechanism 5 is used to convey the 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 to press the anode catalyst layer and the 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 each include at least two first telescopic rods 7 distributed circumferentially along the central axis 1, and at least two first telescopic rods 7 distributed circumferentially along the central axis 1. The second telescopic rod 6, at least two catalytic laminates 2 and at least two frame pressing plates 3, the central axis 1 is slidably connected to the inside of the shell, and can approach or move away from the proton exchange membrane along a direction perpendicular to the proton exchange membrane transport direction, and can rotate around its own axis, the catalyst can be sprayed on the catalytic laminate, and the frame pressing plate can be sprayed with a frame forming agent. The two ends of the first telescopic rod 7 are respectively connected to the catalytic laminate 2 and the side of the central axis 1, and the first telescopic rod 7 is detachably connected to the catalytic laminate 2, which can be specifically a plug-in connection. The two ends of the second telescopic rod 6 are respectively connected to the frame pressing plate 3 and the side of the central axis 1, and the second telescopic rod 6 is detachably connected to the frame pressing plate, which can be specifically a plug-in connection. The central axis 1 of the first laminating roller assembly and the central axis 1 of the second laminating roller assembly can rotate in opposite directions, and the rotation directions of the first laminating roller assembly and the second laminating roller assembly are opposite. The first telescopic rod 7 and the second telescopic rod 6 can be extended and retracted, thereby driving the catalytic laminate 2 and the frame pressing plate 3 to move, and the first telescopic rod 7 can apply a certain pressure to the catalytic laminate 2, and the second telescopic rod 6 can apply a certain pressure to the frame pressing plate 3. Moreover, the first telescopic rod 7 and the catalytic laminate 2 and the second telescopic rod 6 and the frame pressing plate 3 are detachably connected. When the specifications of the membrane electrode need to be changed, it is only necessary to control the first telescopic rod 7 and the second telescopic rod 6 to extend or retract a certain distance, and change the frame The specifications of the pressing plate 3 and the catalytic laminate 2 are such that when a membrane electrode with a shorter frame is required, the first telescopic rod 7 can be controlled to retract a certain distance, the second telescopic rod 6 can also be retracted, and the frame pressing plate 3 and the catalytic laminate 2 with the required width can be replaced as needed, and the central axis 1 can slide close to the proton exchange membrane; when a membrane electrode with a longer catalytic layer is required, there are two feasible methods. The first is to control the first telescopic rod 7 to retract a certain distance, the second telescopic rod 6 can also be retracted, and the catalytic laminate 2 with a longer length and a suitable curvature can be replaced, and a shorter frame pressing plate 3 can be used at the same time, and the central axis 1 can be controlled to move close to the proton exchange membrane, and the number of the first telescopic rod 7 and the second telescopic rod 6 can be increased or decreased as needed. The second method is to control the first telescopic rod 7 and the second telescopic rod 6 to extend a certain distance, and replace the appropriate catalytic laminate 2 and frame pressing plate 3 at the same time, and make the central axis 1 move away from the proton exchange membrane.

[0022] It should be noted that the central axis 1 can slide and rotate relative to the shell in the following manner: a bearing and a connecting rod are provided, a slider is provided inside the shell, the slider is slidably connected to the shell, the outer ring of the bearing is fixedly connected to the slider, the inner ring of the bearing is sleeved with a connecting rod and fixedly connected, and the end of the connecting rod away from the bearing is fixedly connected to the end face of the central axis 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 pressure plate. The detachable connection here can be a plug-in connection or a threaded connection, but in terms of installation space and convenience, the plug-in connection may be more suitable.

[0023] As a preferred embodiment, a plurality of jacks are provided along the circumferential direction on the side of the central axis 1, and a plurality of first telescopic rods 7 and second telescopic rods 6 are arranged along the circumference of the central axis 1, and a plurality of first telescopic rods 7 and second telescopic rods 6 can be inserted into the jacks, wherein a second telescopic rod 6 is provided between any two first telescopic rods 7. The plurality of jacks provide a variety of 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 around the central axis 1 can be flexibly changed to adapt to the preparation of membrane electrodes of different sizes, shapes or process requirements. When a membrane electrode with a longer length needs to be produced, the second telescopic rod 6 between the two first telescopic rods 7 can be removed, and the first telescopic rod 7 can be controlled to retract until two adjacent catalytic laminates 2 are in contact. Moreover, catalytic laminates 2 and frame pressing plates 3 of different widths are used for membrane electrodes of different sizes. The convenient installation and disassembly of the first telescopic rod 7 and the second telescopic rod 6 make the replacement of the catalytic laminates 2 and the frame pressing plates 3 more convenient.

[0024] In some embodiments, the membrane electrode preparation device also includes a catalyst injection device 4, which is fixedly arranged inside the shell and is used to spray catalyst onto the surface of the catalytic laminate 2. The catalyst injection device 4 is arranged on both sides of the intermediate membrane conveying mechanism 5, one for spraying anode catalyst and the other for spraying cathode catalyst.

[0025] In some embodiments, the nozzle of the catalyst injection device can be attached to the catalytic laminate, and a position sensing sensor is provided at the end of the nozzle near the catalytic laminate, and the contact sensor is used to sense whether the catalytic laminate reaches the bottom of the nozzle. Preferably, the nozzle of the catalyst injection device 4 can be attached to the catalytic laminate 2, and a contact sensor is provided at the end of the nozzle near the catalytic laminate 2, and the contact sensor is used to sense whether the nozzle is in contact with the catalytic laminate 2. The contact sensor and the controller of the nozzle are connected to a control system together. The contact sensor transmits an electrical signal sensing whether the nozzle is in contact with the catalytic laminate 2 to the control system, and the control system controls the opening and closing of the nozzle according to the contact signal. When the nozzle is in contact with the catalytic laminate 2, the nozzle starts to spray the catalyst, and when the nozzle is not in contact with the catalytic laminate 2, the spraying of the catalyst stops, which can ensure accurate injection of the catalyst, good injection effect, and reduce waste.

[0026] It should be noted that there are many options for setting the nozzle and the sensor. For example, the nozzle is not in contact with the catalytic laminate 2, but is at a certain distance from the catalytic laminate 2. In this case, the sensor is a laser sensor or an ultrasonic sensor. The laser sensor or the ultrasonic sensor is used to sense whether the catalytic laminate 2 has reached the injection position. When the nozzle senses that the catalytic laminate 2 has reached the injection position, the nozzle starts to spray the catalyst.

[0027] In some embodiments, the intermediate membrane conveying mechanism 5 includes a first clamping plate 51 and a second clamping plate 52 that are arranged opposite to each other, at least a first running wheel 53 and a second running wheel 54 that are arranged opposite to each other are arranged between the first clamping plate 51 and the second clamping plate 52, the first running wheel 53 and the second running wheel 54 can rotate around their own axes, and the first running wheel 53 and the second running wheel 54 can rotate in opposite directions, and the proton exchange membrane is used to be placed between the first running wheel 53 and the second running wheel 54. The first clamping plate 51 and the second clamping plate 52 that are arranged opposite to each other can provide a certain clamping force to the proton exchange membrane from both sides, ensuring that the proton exchange membrane will not shake or deviate left and right during the conveying process, maintaining its accurate position on the conveying path, facilitating the subsequent precise pressing with the catalyst layer, and improving the accuracy 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 a driving force in opposite directions, which can evenly drive the proton exchange membrane forward, and can effectively avoid problems such as distortion and wrinkles of the proton exchange membrane that may be caused by unilateral driving, thereby ensuring the flatness of the proton exchange membrane during transportation and providing guarantee for high-quality membrane electrode preparation.

[0028] In some embodiments, a plurality of first traveling wheels 53 and a plurality of second traveling wheels 54 are correspondingly arranged between the first clamping plate 51 and the second clamping plate 52, and the ends of the clamping space of the first clamping plate 51 and the second clamping plate 52 are provided with the first traveling wheels 53 and the second traveling wheels 54. The plurality of correspondingly arranged traveling wheels form 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 size or softer texture, multi-point support can effectively disperse its own weight and external force, ensure that the proton exchange membrane always remains flat, prevent wrinkles or distortion, and improve the quality stability of membrane electrode preparation. The first traveling wheel 53 and the second traveling wheel 54 are arranged at the ends of the clamping space to enhance the transportation stability of the starting and ending ends of the proton exchange membrane, help prevent the proton exchange membrane from being offset due to uneven force at the beginning and end of transportation, and ensure the smoothness and accuracy of the entire transportation process.

[0029] In some embodiments, the intermediate membrane conveying mechanism 5 further includes a frame pressing roller assembly, and two entrances are provided at the relative positions of the first clamping plate 51 and the second clamping plate 52, the first entrance is used for the frame to enter, and the second entrance is used for the frame pressing roller assembly to enter, and the frame pressing roller assembly includes a first frame pressing roller 57 and a second frame pressing roller 58 respectively arranged on the outside of the first clamping plate 51 and the outside of the second clamping plate 52, and the frame pressing roller assembly is slidably connected to the inside of the shell, and 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, and the rotation direction of the first frame pressing roller 57 and the second frame pressing roller 58 is opposite. The entrance is provided at the relative position of the first clamping plate 51 and the second clamping plate 52, so that the frame can enter through the special entrance, and accurately correspond to the frame pressing roller assembly, ensuring that the position of the frame is accurate during the pressing process, and can be accurately combined with the proton exchange membrane, improving the accuracy of the membrane electrode frame pressing, and avoiding problems such as poor combination of the frame and the membrane body due to position deviation. The first frame pressing roller 57 and the second frame pressing roller 58 are respectively arranged on the outside of the first clamping plate 51 and the outside of the second clamping plate 52, and the rotation directions are opposite, so that the frame can be pressed from both sides at the same time. The double-sided synchronous pressing method ensures that the force on the frame is uniform and the pressing is tight, which effectively improves the fit 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 in a direction perpendicular to the transport direction of the proton exchange membrane, so that the equipment can flexibly adjust the pressing distance according to the frame thickness, width and other specifications of different membrane electrode products. Whether it is a thicker frame that requires greater pressure and distance, or a thinner frame that requires precise control of the pressing force, it can be met by adjusting the position of the frame pressing roller assembly, thereby improving the versatility of the equipment. The specific rotation and sliding setting method of the frame pressing roller assembly can be similar to the setting method of the central axis 1.

[0030] In some embodiments, the intermediate film conveying mechanism 5 further includes a frame guide plate assembly, which includes a first guide plate 55 and a second guide plate 56, which are respectively arranged obliquely on the outer sides of the first clamping plate 51 and the second clamping plate 52, and the first guide plate gradually approaches the first clamping plate from the direction away from the frame laminating roller assembly to the direction close to the first frame laminating roller assembly, and the first guide plate is in contact with one end of the first entrance on the first clamping plate close to the first frame laminating roller, and the second guide plate gradually approaches the second clamping plate from the direction away from the frame laminating roller assembly to the direction close to the second frame laminating roller assembly, and the second guide plate is in contact with one end of the first entrance on the second clamping plate close to the second frame laminating roller, preferably, the first guide plate 55 and the second guide plate 56 are combined into a trumpet shape, and the open end is consistent with the direction of proton exchange membrane transmission. The first guide plate 55 and the second guide plate 56 are combined into a trumpet shape, and the open end is consistent with the direction of proton exchange membrane transmission, providing a clear and definite guide path for the frame to enter the intermediate film conveying mechanism 5. The frame can follow the guidance of the bell mouth and accurately enter the first entrance, precisely corresponding to the position of the proton exchange membrane, effectively avoiding the frame from being offset or misaligned during transportation, improving the accuracy of the assembly of the frame and the proton exchange membrane, and thus improving the production quality of the membrane electrode. The bell-shaped guide plate has a larger opening range and has a certain tolerance for slight deviations in the starting position of the frame. Even if the position of the frame is slightly inaccurate when it is initially placed, it can smoothly enter the first entrance under the action of the guide plate, reducing production failures caused by frame position deviations and improving the stability and reliability of the production process.

[0031] In some embodiments, the ends of the first clamping plate 51 and the second clamping plate 52 are deflected from the inside to the outside, that is, from the side close to the proton exchange membrane to the side away from the proton exchange membrane. The ends are deflected outward to form a shape similar to a trumpet mouth, and a guide entrance is provided for the proton exchange membrane. When the proton exchange membrane is placed 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, thereby reducing the difficulty of placement, improving the accuracy of positioning, and reducing the conveying failure caused by placement deviation.

[0032] In some embodiments, the membrane electrode preparation device also includes a temperature regulating device, which is arranged inside the catalytic laminate 2, the frame pressing plate 3 and the frame pressing roller assembly. The temperature regulating device is arranged in the catalytic laminate 2, and the temperature when the catalytic layer and the proton exchange membrane are pressed can be accurately controlled. The appropriate temperature can improve the activity and fluidity of the catalyst, make the catalytic layer and the proton exchange membrane better integrated, and enhance the adhesion between the two, thereby improving the performance and stability of the membrane electrode. For example, for some temperature-sensitive catalysts, precise temperature control can ensure that it is combined with the proton exchange membrane at the optimal active temperature, thereby improving the efficiency of the electrochemical reaction. The temperature regulating device in the frame pressing plate 3 and the frame pressing roller assembly can make the frame material in a suitable temperature state when pressed. Some frame materials will have better plasticity and viscosity at a specific temperature. The frame can be closely fitted with the proton exchange membrane through temperature regulation, ensuring the overall sealing and structural stability of the membrane electrode, and preventing problems such as gas leakage caused by the loose combination of the frame and the membrane.

[0033] Embodiment 2 like Figure 6-Figure 10 As shown, unlike the square catalytic laminated plate 2 of the first embodiment, this embodiment adopts a circular catalytic laminated plate 2, and the frame plate 3 is also changed to a certain extent, and the cross section corresponding to the catalytic laminated plate 2 is also a circular cross section. The adjustment method is similar to that of the first embodiment, and this embodiment can adapt to the situation where the effective cross section of the membrane electrode is circular. It should be noted that the membrane electrode preparation devices of the first and second embodiments are more suitable for the preparation of membrane electrodes with a changed catalyst layer length.

[0034] Embodiment 3 like Figure 11-12 As shown, unlike the arc-shaped catalytic laminate 2 in Example 1 and Example 2, the catalytic laminate 2 in this embodiment is a flat plate, and the frame pressure plate 3 can be a flat plate or an arc panel. The adjustment method is similar to that of Example 1. This embodiment is more suitable for the preparation of membrane electrodes with changed frame lengths.

[0035] Embodiment 4 like Fig.13As shown, the first lamination roller assembly and the second lamination roller assembly are respectively arranged on both sides of the intermediate film conveying mechanism 5 of this embodiment, and another intermediate film conveying mechanism 5 can be arranged on the side of the second lamination roller assembly different from the intermediate film conveying mechanism 5, and at the same time, a third lamination roller assembly can be arranged on the side of the intermediate film conveying mechanism 5 different from the second lamination roller assembly, and the rotation direction of the third lamination roller assembly is the same as that of the first lamination roller assembly. Such a similar arrangement can make full use of each lamination roller assembly and improve production efficiency. It should be noted that such a repeated mechanism can be arranged in multiples according to production needs and space conditions. The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting 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, 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 assembly, 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 assembly, 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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