Preparation device of flat-coated membrane electrode for producing hydrogen by electrolyzing water
By introducing a leveling device and a hot roller system into the membrane electrode preparation device for hydrogen production by water electrolysis, the problems of membrane electrode edge collapse and catalyst drop were solved, and the flatness and quality of the membrane electrode were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2026-04-14
AI Technical Summary
Membrane electrodes used in water electrolysis for hydrogen production are prone to edge collapse and catalyst detachment during the preparation process, which affects product quality.
A leveling device is introduced into the membrane electrode preparation apparatus, which uses multiple hot rollers to soften and shape the diaphragm at different temperatures, combined with cooling rollers for shaping, to eliminate edge collapse and reduce catalyst drop.
This enabled the production of flat membrane electrodes, reduced catalyst shedding, improved coating yield, and avoided quality defects caused by increased tension.
Smart Images
Figure CN224119128U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of membrane electrode preparation technology for hydrogen production by water electrolysis, and more specifically to a membrane electrode preparation device for hydrogen production by water electrolysis. Background Technology
[0002] In the process of preparing membrane electrodes for hydrogen production by water electrolysis, a catalyst needs to be coated on the membrane to attach the catalyst to the membrane and form a membrane electrode. The equipment used is the membrane electrode preparation device for hydrogen production by water electrolysis.
[0003] The membrane electrode assembly (MEA) for hydrogen production via water electrolysis includes a frame on which, from back to front, an unwinding device, a coating device, a drying device, and a winding device are sequentially mounted. The unwinding device releases the membrane and includes a roller for releasing the membrane. The coating device coats the membrane with a catalyst and includes a spray head that sprays the catalyst onto the membrane. The drying device fixes the catalyst onto the membrane in a high-temperature environment and includes a high-temperature chamber with an inlet for the product to be dried and an outlet for the product. During use, the membrane to be cured enters the high-temperature chamber through the inlet, and the cured MEA exits through the outlet. The winding device coils the cured MEA and includes a winding roller for winding the MEA.
[0004] The membrane electrode produced often suffers from edge collapse, affecting product quality. In the existing technology, the solution is to increase the unwinding tension during coating to forcibly flatten the diaphragm. However, this results in quality defects such as severe diaphragm shrinkage and catalyst falling off after coating. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a membrane electrode preparation device for water electrolysis hydrogen production that produces a flat membrane electrode with minimal or no catalyst shedding and other quality defects—a flattened membrane electrode preparation device for water electrolysis hydrogen production.
[0006] The technical solution of this utility model is implemented as follows: A membrane electrode preparation device for electrolytic water production of hydrogen includes a frame. From back to front, an unwinding device, a coating device, a drying device, and a rewinding device are sequentially installed on the frame. The unwinding device is used to release the membrane and includes a roller for releasing the membrane. The coating device is used to coat the catalyst onto the membrane and includes a spray head that can spray the catalyst onto the membrane. The drying device is used to fix the catalyst onto the membrane in a high-temperature environment and includes a high-temperature chamber with an inlet for drying the product and an outlet for curing the product during use. The diaphragm enters the high-temperature chamber from the inlet, and the cured membrane electrode flows out from the product outlet. The winding device is a device that winds up the cured membrane electrode, which includes a winding roller that can wind the membrane electrode. The diaphragm travels from the unwinding device, through the coating device, through the drying device, to the winding device to form a running path. The device is characterized by: a leveling device is also installed on the device frame. The leveling device includes a hot ironing roller connected to a hot ironing motor. The hot ironing roller has a space for placing heating components inside, and the heating components are installed in this space. The hot ironing roller is installed on the side of the running path between the drying device and the winding device and is in contact with the side of the running path.
[0007] Furthermore, there are multiple hot ironing rollers, which are arranged on the device frame in sequence from back to front to contact the running path.
[0008] Furthermore, the hot ironing roller also has a Teflon material layer on the outside.
[0009] Furthermore, the multiple hot ironing rollers on the device frame are, from back to front, a rear hot ironing roller, a middle hot ironing roller, and a front hot ironing roller, wherein the middle hot ironing roller has a higher temperature than the rear hot ironing roller and the front hot ironing roller.
[0010] Furthermore, the device also includes a refrigeration device, which has a cold air output pipe. In front of the hot ironing roller, there is a cooling roller, which has a cold air inlet and a gas outlet. The cold air output pipe is connected to the cold air inlet by a cold air delivery pipe. The running path also passes through the side of the cooling roller and contacts the side of the cooling roller.
[0011] The beneficial effects of this invention are: the membrane electrode preparation device for hydrogen production by water electrolysis has the advantages of producing membrane electrodes that are flat and have no or reduced quality defects such as catalyst falling off. Attached Figure Description
[0012] Figure 1 This is a side view of the structure of this utility model.
[0013] Figure 2This is a schematic diagram of the internal structure of a hot ironing roller according to this utility model.
[0014] Figure 3 This is a schematic diagram showing the connection relationship between the cooling roller and the refrigeration device of this utility model.
[0015] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along the A-A direction.
[0016] The components include: 1. Frame; 2. Unwinding device; 21. Unwinding roller; 3. Coating device; 31. Spray head; 4. Drying device; 41. High temperature chamber; 5. Rewinding device; 51. Rewinding roller; 6. Running route; 7. Leveling device; 71. Hot stamping roller; 72. Heating component; 73. Teflon material layer; 713. Rear hot stamping roller; 714. Middle hot stamping roller; 715. Front hot stamping roller; 8. Cooling device; 81. Cold air conveying pipe; 82. Rotary joint; 9. Cooling roller; 91. Cold air inlet; 92. Gas outlet; 93. Cooling pipe. Detailed Implementation
[0017] The technical solution of this utility model will be further described below with reference to the embodiments.
[0018] like Figure 1 As shown, the membrane electrode assembly for hydrogen production via water electrolysis includes a frame 1. From back to front, an unwinding device 2, a coating device 3, a drying device 4, and a winding device 5 are sequentially mounted on the frame. The unwinding device releases the membrane and includes an unwinding roller 21. The coating device coats the catalyst onto the membrane and includes a spray head 31 for spraying the catalyst onto the membrane. The drying device fixes the catalyst onto the membrane in a high-temperature environment and includes a high-temperature chamber 41 with an inlet for drying the product and an outlet for drying the product. During use, the membrane to be cured is... The imported material enters the high-temperature chamber, and the cured membrane electrode flows out from the product outlet. The winding device is a device that coils the cured membrane electrode, which includes a winding roller 51 that can wind the membrane electrode. The diaphragm travels from the unwinding device, through the coating device, through the drying device, to the winding device to form a running route 6. The device is characterized by a flattening device 7 installed on the frame. The flattening device includes a hot ironing roller 71 connected to a hot ironing motor. The hot ironing roller has a space for placing a heating component 72, and the heating component is installed in this space. The hot ironing roller is installed on the side of the running route between the drying device and the winding device and is in contact with the side of the running route.
[0019] The above-mentioned features of this utility model enable the membrane electrode to be flattened by a hot roller after the membrane electrode is generated in the water electrolysis hydrogen production process. That is, the hot roller is used to soften and deform the diaphragm at a certain temperature to make the product flat, thereby eliminating the phenomenon of edge collapse. No additional tension is required, thus achieving the purpose of this utility model.
[0020] The heating component can be, for example, an electric heating element, as long as it can bring the hot ironing roller to a certain temperature.
[0021] The above-mentioned features of this utility model allow the flattening device to flatten the diaphragm with edge collapse defects, thereby eliminating the edge collapse phenomenon in the product. Furthermore, the diaphragm can be sprayed under low tension, improving the coating yield and achieving the purpose of this utility model.
[0022] Furthermore, there are multiple hot ironing rollers, which are arranged on the device frame in sequence from back to front to contact the running path.
[0023] The above-mentioned features of this utility model can achieve the advantage of better leveling effect.
[0024] Furthermore, the hot ironing roller is also covered with a Teflon material layer 73.
[0025] The above-mentioned features of this utility model reduce the phenomenon of adhesion.
[0026] Furthermore, the multiple hot ironing rollers on the device frame are, from back to front, a rear hot ironing roller 713, a middle hot ironing roller 714, and a front hot ironing roller 715, wherein the middle hot ironing roller has a higher temperature than the rear hot ironing roller and the front hot ironing roller.
[0027] The above-mentioned features of this utility model can achieve a better leveling effect.
[0028] The intermediate heating roller has a higher temperature than the rear heating roller and the front heating roller, for example, by installing a heating component with higher power in the intermediate heating roller.
[0029] In one embodiment, the temperature ranges of the rear hot ironing roller 713, the middle hot ironing roller 714, and the front hot ironing roller 715 are 78-82°C, 83-85°C, and 78-82°C, respectively.
[0030] To elaborate further, such as Figure 1 , 3 As shown in Figure 4, this device also includes a refrigeration device 8, which has a cold air output pipe. In front of the hot ironing roller, there is a cooling roller 9. The cooling roller has a cold air inlet 91 and a gas outlet 92. The cold air output pipe is connected to the cold air inlet by a cold air delivery pipe 81. The running path also passes through the side of the cooling roller and contacts the side of the cooling roller.
[0031] For example, the cold air inlet is located on the axis of the cooling roller and is connected to the cold air delivery pipe by a rotating joint 82; there are multiple cooling pipes 93 around the cooling roller, which connect the cold air inlet 91 and the gas outlet 92.
[0032] The refrigeration device is a component in the prior art; it is acceptable as long as it can generate low temperatures, such as an air conditioner.
[0033] This design also has the advantage of providing a better shaping effect for the membrane electrode by the cooling roller.
[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A membrane electrode assembly (MEA) for hydrogen production via water electrolysis, comprising a frame on which an unwinding device, a coating device, a drying device, and a winding device are sequentially mounted from back to front. The unwinding device releases the membrane and includes a roller for releasing the membrane. The coating device coats a catalyst onto the membrane and includes a spray head for spraying the catalyst onto the membrane. The drying device fixes the catalyst onto the membrane in a high-temperature environment and includes a high-temperature chamber with an inlet for drying the product and an outlet for the product. During use, the membrane to be cured enters the high-temperature chamber through the inlet, and the cured MEA exits from the outlet. The winding device coils the cured MEA and includes a winding roller for winding the MEA. The membrane travels from the unwinding device, through the coating device, through the drying device, to the winding device, forming a path. Its characteristic is: A flattening device is also installed on the device frame. The flattening device includes a hot ironing roller connected to a hot ironing motor. The hot ironing roller has a space for placing heating components inside, and the heating components are installed in this space. The hot ironing roller is installed on the side of the running path between the drying device and the winding device and is in contact with the side of the running path.
2. The membrane electrode preparation apparatus for electrolytic water production of hydrogen according to claim 1, characterized in that: The hot ironing rollers are multiple, and the multiple hot ironing rollers are arranged on the device frame from back to front to contact the running route.
3. The apparatus for preparing a flattened membrane electrode for hydrogen production by water electrolysis according to claim 1 or 2, characterized in that: The hot ironing roller also has a Teflon material layer on the outside.
4. The apparatus for preparing a flattened membrane electrode for hydrogen production by water electrolysis according to claim 1 or 2, characterized in that: Multiple hot ironing rollers are mounted on the device frame, arranged from back to front as a rear hot ironing roller, a middle hot ironing roller, and a front hot ironing roller, with the middle hot ironing roller having a higher temperature than the rear and front hot ironing rollers.
5. The apparatus for preparing a flattened membrane electrode for hydrogen production by water electrolysis according to claim 1 or 2, characterized in that: The device also includes a refrigeration device with a cold air output pipe. In front of the hot ironing roller, there is a cooling roller with a cold air inlet and a gas outlet. The cold air output pipe is connected to the cold air inlet by a cold air delivery pipe. The running path also passes through the side of the cooling roller and contacts the side of the cooling roller.