Proton exchange membrane electrolyzed water test clamp structure
By designing the multi-cell structure and snap-up fastening mechanism, the problem of component misalignment during the disassembly of the proton exchange membrane electrolytic test fixture is solved, and a more stable fixture structure and better interface contact is achieved, ensuring the electrolytic equipment Normal operation and stable performance.
Patent Information
- Application Number
- CN202420707511.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-08
AI Technical Summary
During the disassembly of the proton exchange membrane electrolytic test fixture, the membrane electrode, porous transport layer and gas diffusion layer are prone to misalignment, resulting in abnormal voltage rise and leakage, affecting the normal operation and performance durability of the equipment.
Design a proton exchange membrane electrolytic water test fixture structure, including at least two sets of single cells, each group consisting of an anode plate, a cathode plate, a membrane electrode, a sealing gasket and a gas diffusion layer, and it is fastened by snapping and fastening to form multiple batteries and anode plate. The back of the cathode plate is designed to prevent components from being misaligned and to achieve a sealing effect by compressing and thinning the gasket.
It effectively prevents components from being misaligned during disassembly of the electrolytic water fixture, ensures the interface contact between the membrane electrode and the gas diffusion layer, avoids performance changes caused by loose misalignment, and ensures the effectiveness of the test data.
Smart Images
Figure CN222318847U_ABST
Abstract
Description
[Technical field]
[0001] The utility model belongs to the technical field of hydrogen energy, in particular to a proton exchange membrane water electrolysis test fixture structure. [Background Technology]
[0002] Proton exchange membrane water electrolysis is a technology that decomposes water into oxygen and hydrogen. It can provide electrolytic hydrogen for energy storage, industry and transportation industries, and become a key component in future energy scenarios based on renewable energy. The electrolyzer that drives water electrolysis is usually composed of end plates, power-on plates, anode plates, porous transmission layers, membrane electrodes, gas diffusion layers, cathode plates and sealing gaskets, which are squeezed and tightly fitted by the end plates to play a sealing role and reduce the voltage loss caused by interface impedance. Among them, the structure composed of porous diffusion layer, membrane electrode and plate is the core area where water-gas mass transfer and electrochemical reaction occur. In order to improve the efficiency of water electrolysis testing and reduce equipment costs, in the process of proton exchange membrane water electrolysis testing, multiple bipolar plates are usually connected in series to form a water electrolysis test fixture. However, during the operation of the test fixture, a membrane electrode in the fixture may be improperly assembled or aging components, resulting in abnormal voltage rise or even leakage.
[0003] In order to ensure the normal operation of the water electrolysis fixture, when the voltage of a certain membrane electrode is found to be abnormal, the operation is usually stopped and one of the membrane electrodes is removed or replaced. However, during the disassembly of the water electrolysis fixture, other normal membrane electrodes, porous diffusion layers and bipolar plates will inevitably become loose and the reaction position will shift due to the lack of compression from the end plates. In addition, due to the swelling characteristics of the proton membrane, during the reassembly process, the swollen part of the proton membrane is squeezed and wrinkled, making reassembly difficult, which ultimately affects the performance and durability of the membrane electrode. [Contents of the utility model]
[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a proton exchange membrane water electrolysis test fixture structure, which can ensure that the membrane electrode, porous transmission layer, gas diffusion layer and electrode plate will not be seriously misaligned during the disassembly of the electrolytic cell.
[0005] In order to achieve the above purpose, a proton exchange membrane water electrolysis test fixture structure is designed, including at least two groups of single cells, each group of single cells is composed of an anode plate 1, a cathode plate 2, a membrane electrode 3, a sealing gasket 4, a porous transmission layer 5 and a gas diffusion layer 6. The membrane electrode 3 is arranged between the anode plate 1 and the cathode plate 2, the porous transmission layer 5 is arranged between the anode plate 1 and the membrane electrode 3, and the gas diffusion layer 6 is arranged between the cathode plate 2 and the membrane electrode 3. The porous transmission layer 5 and the gas diffusion layer 6 are respectively arranged in the flow channel area 1 in the center of the anode plate 1 and the cathode plate 2. 5, and a sealing gasket 4 is arranged on the periphery of the porous transport layer 5 and the gas diffusion layer 6, and a water inlet 12, a water outlet 13 and a hydrogen outlet 14 are arranged at the four corners of the flow channel area 15 on the anode plate 1; each group of single cells is fastened together by a buckle 10, and at least two groups of single cells are connected in series in sequence to form a multi-battery, and an anode power-on plate 8-1 and a cathode power-on plate 8-2 are respectively arranged on the outside of the anode plate 1 and the cathode plate 2 on the outside of the multi-battery, and the anode power-on plate 8-1 and the cathode power-on plate 8-2 are connected to the multi-battery as a whole to form an electrolyzed water test fixture.
[0006] Furthermore, grooves are provided on the upper and lower sides of the back of the anode plate 1 and the cathode plate 2, and the grooves are extended in the horizontal direction. Buckle reserved holes 11 are provided on both sides of the grooves, and the buckle strips of the buckle 10 fasten the anode plate 1 and the cathode plate 2 together through the buckle reserved holes 11, thereby further solving the problem of misalignment of various components of the electrolysis water fixture during disassembly.
[0007] Furthermore, the grooves located on the upper and lower sides of the anode plate 1 and the cathode plate 2 have gaps from the top and bottom of the plates respectively, and the buckle reserved holes 11 on both sides of the grooves are arranged in pairs, and the thickness of the two ends of the buckle 10 is less than the depth of the groove, thereby effectively preventing the occurrence of misalignment of other internal components of the single battery.
[0008] Furthermore, end plates 7 are provided on the outer sides of the anode power-on plate 8-1 and the cathode power-on plate 8-2, and positioning pins are connected to the end plates 7. The anode power-on plate 8-1, the cathode power-on plate 8-2 and the multiple batteries are pressurized and bonded together through the end plates 7 and the positioning pins to form an electrolyzed water test fixture, thereby pressurizing, bonding and reinforcing the power-on plates and the multiple battery pack more firmly.
[0009] Furthermore, the middle of the sealing gasket 4 is hollow relative to the flow channel area 15 of the electrode plate, and the thickness of the porous transport layer 5 and the gas diffusion layer 6 are thinner than the sealing gasket 4. Therefore, under the clamping force, the sealing gasket is compressed and thinned to achieve a sealing effect, while ensuring good interface contact between the porous transport layer and the gas diffusion layer and the electrode plate and the membrane electrode.
[0010] Compared with the prior art, the utility model has the following advantages:
[0011] (1) The utility model splits the traditional bipolar plate into a cathode plate and an anode plate, and arranges a porous diffusion layer and a membrane electrode between the plates to form a group of single cells. Multiple single cells are connected in series to form a multi-cell water electrolysis test fixture, so that when a damaged single cell is removed, the internal components of other single cells are effectively prevented from being dislocated;
[0012] (2) The utility model designs two grooves on the upper and lower sides of the back of the electrode plate, and leaves two holes on both sides of the groove. The buckle strip of the buckle completes the fastening of the two electrode plates through the holes, thereby further solving the problem of misalignment of various components of the electrolytic water fixture during disassembly;
[0013] (3) The thickness of the porous transport layer and the gas diffusion layer of the utility model is thinner than that of the sealing gasket. Under the clamping force, the sealing gasket is compressed and thinned to achieve a sealing effect, while ensuring a good interface contact between the porous transport layer and the gas diffusion layer and the electrode plate and the membrane electrode;
[0014] (4) The utility model can ensure that the membrane electrode, porous transport layer, gas diffusion layer and electrode plate will not be seriously misaligned during the disassembly of the electrolytic cell, effectively avoiding the performance changes of other single cells before and after disassembly due to loose internal structure misalignment, and ensuring the validity of the data of other membrane electrodes before and after disassembly. [Drawings]
[0015] Figure 1 This is a schematic diagram of the structure of the proton exchange membrane water electrolysis test fixture before the improvement of the utility model;
[0016] Figure 2 It is a structural schematic diagram of the proton exchange membrane water electrolysis test fixture of the utility model;
[0017] Figure 3 It is a structural schematic diagram of the anode plate in the test fixture of the utility model;
[0018] Figure 4 It is a schematic diagram of the structure of the cathode plate in the test fixture of the utility model;
[0019] Figure 5 It is a schematic diagram of the buckle used to fix the electrode plate in the test fixture of the utility model;
[0020] Figure 6 It is a schematic diagram of the assembly process of the test fixture of the utility model;
[0021] In the figure: 1. anode plate; 2. cathode plate; 3. membrane electrode; 4. sealing gasket; 5. porous transport layer; 6. gas diffusion layer; 7. end plate; 8-1. anode power plate; 8-2. cathode power plate; 9. bipolar plate; 10. buckle; 11. buckle reserved hole; 12. water inlet; 13. water outlet; 14. hydrogen outlet; 15. flow channel area 16. anode plate two; 17. cathode plate two. [Specific implementation method]
[0022] The utility model provides a proton exchange membrane water electrolysis test fixture structure, including at least two groups of single cells, each group of single cells is composed of an anode plate 1, a cathode plate 2, a membrane electrode 3, a sealing gasket 4, a porous transmission layer 5 and a gas diffusion layer 6, a membrane electrode 3 is arranged between the anode plate 1 and the cathode plate 2, a porous transmission layer 5 is arranged between the anode plate 1 and the membrane electrode 3, a gas diffusion layer 6 is arranged between the cathode plate 2 and the membrane electrode 3, and the porous transmission layer 5 and the gas diffusion layer 6 are respectively arranged at the flow channel area 15 in the center of the anode plate 1 and the cathode plate 2 , and a sealing gasket 4 is arranged on the periphery of the porous transport layer 5 and the gas diffusion layer 6, and a water inlet 12, a water outlet 13 and a hydrogen outlet 14 are arranged at the four corners of the flow channel area 15 on the anode plate 1; each group of single cells is fastened together by a buckle 10, and at least two groups of single cells are connected in series in sequence to form a multi-battery, and an anode power-on plate 8-1 and a cathode power-on plate 8-2 are respectively arranged on the outside of the anode plate 1 and the cathode plate 2 on the outside of the multi-battery, and the anode power-on plate 8-1, the cathode power-on plate 8-2 are connected to the multi-battery as a whole to form an electrolytic water test fixture.
[0023] Among them, the outer sides of the anode power plate 8-1 and the cathode power plate 8-2 are both provided with end plates 7, and positioning pins are connected to the end plates 7. The anode power plate 8-1, the cathode power plate 8-2 and the multi-battery are pressed and bonded together through the end plates 7 and the positioning pins to form an electrolytic water test fixture, so that the power plate and the multi-battery group are pressed and bonded more firmly. The middle of the sealing gasket 4 is hollow relative to the flow channel area 15 of the plate, and the thickness of the porous transmission layer 5 and the gas diffusion layer 6 are thinner than the sealing gasket 4, so that under the clamping force, the sealing gasket is compressed and thinned to achieve a sealing effect, while ensuring a good interface contact between the porous transmission layer and the gas diffusion layer and the plate and the membrane electrode.
[0024] In the utility model, grooves are provided on the upper and lower sides of the back of the anode plate 1 and the cathode plate 2, and the grooves are extended in the horizontal direction. Buckle reserved holes 11 are provided on both sides of the grooves. The buckle strips of the buckle 10 fasten the anode plate 1 and the cathode plate 2 as a whole through the buckle reserved holes 11, thereby further solving the problem of misalignment of various components of the electrolysis water fixture during disassembly; the grooves located on the upper and lower sides of the anode plate 1 and the cathode plate 2 have gaps from the top and bottom of the plates respectively, and the buckle reserved holes 11 on both sides of the grooves are arranged in pairs, and the thickness of the two ends of the buckle 10 is less than the depth of the groove, thereby effectively preventing the occurrence of misalignment of other internal components of the single battery.
[0025] The utility model abandons the commonly used bipolar plate design (such as the attached Figure 1 ), the bipolar plate is split into a cathode plate and an anode plate, and a porous diffusion layer and a membrane electrode are between the plates to form a group of single cells, and the stacking of multiple single cells constitutes a multi-cell water electrolysis test fixture; in order to further solve the problem of misalignment of various components of the water electrolysis fixture during disassembly, two grooves are designed on the upper and lower sides of the back of the plate, and two holes are reserved on both sides of the groove. The buckle strip of the buckle completes the fastening of the two plates through the holes, wherein the thickness of the two ends of the buckle is less than the depth of the groove. During assembly, each single cell is reinforced by four buckles, and multiple single cells are connected in series to form a multi-cell water electrolysis test fixture. When a damaged single cell is removed, the misalignment of internal components of other single cells is effectively prevented.
[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] like Figure 3 and Figure 4 As shown in the figure, two grooves are designed on the back of the plate, and the grooves are 10mm away from the top and bottom of the plate, respectively. The depth of the grooves is 2mm and the width is 10mm. Inside the grooves, two circular holes with a diameter of 5mm are designed 10mm away from the side of the plate. A plate has a total of eight holes, and a single battery consists of four buckles (such as Figure 5 ) to reinforce it.
[0028] like Figure 6As shown, a single cell consists of an anode plate, a porous diffusion layer, a sealing gasket, a membrane electrode, a gas diffusion layer and a cathode plate. The two sealing gaskets are respectively attached to the anode plate and the cathode plate, with the membrane electrode in the middle. After clamping, pure water will not leak under the action of the sealing gasket. The plate flow channel area in the middle of the sealing gasket is hollow. The porous transmission layer and the gas diffusion layer are respectively placed in the flow channel area of the plate to manage water and gas. The thickness of the porous transmission layer and the gas diffusion layer is thinner than the sealing gasket. Under the clamping force, the sealing gasket is compressed and thinned to achieve a sealing effect, while ensuring a good interface contact between the porous transmission layer and the gas diffusion layer and the plate and the membrane electrode. After clamping, the single cell is fastened with a buckle at the position of the buckle reserved hole to ensure that the internal components of the single cell do not loosen.
[0029] Complete the assembly of other single cells according to the above steps, and then connect multiple single cells in series to form a multi-battery. The left side of the multi-battery group is the anode plate, and the right side is the cathode plate. The anode power plate and the cathode power plate are placed on the left and right sides of the multi-battery group. Under the action of the positioning pins and end plates, the power plate and the multi-battery group are pressurized and fitted, and then reinforced with screws to form an electrolyzed water test fixture.
[0030] During the test, pure water with a certain temperature enters from the top of the left end plate and reaches each anode plate. Under the action of the flow channel of the anode plate, the pure water stays in the flow channel for a short time and ensures the reaction temperature inside the single cell. Under the action of the sealing gasket, the pure water only exists in the flow channel area in the center of the anode plate. Pure water passes through the porous transport layer in the single cell to reach the membrane electrode. After a certain current is applied to the energized plate, the oxidation reaction is stimulated, and the pure water is decomposed into oxygen and protons. Oxygen and the remaining unreacted pure water pass through the porous transport layer and flow out from the water outlet of the anode plate. Under the action of the proton exchange membrane, the protons pass through the cathode to undergo a hydrogen evolution reaction and generate hydrogen. The generated hydrogen passes through the gas diffusion layer, through the flow channel of the cathode plate, and escapes from the hole below the anode plate.
[0031] After a single cell is found to be faulty, the test fixture is disassembled and the target single cell is removed. Because the single cell is fastened by the buckle, the internal structure of other single cells will not loosen during the disassembly process. After the faulty single cell is removed and reassembled, the test can continue, effectively avoiding performance changes of other single cells before and after disassembly due to loose and misaligned internal structures, and ensuring the validity of data of other membrane electrodes before and after disassembly.
[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.
[0033] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.
Claims
1. A proton exchange membrane water electrolysis test fixture structure, characterized in that: The invention comprises at least two groups of single cells, each group of single cells comprises an anode plate (1), a cathode plate (2), a membrane electrode (3), a sealing gasket (4), a porous transmission layer (5) and a gas diffusion layer (6), wherein a membrane electrode (3) is arranged between the anode plate (1) and the cathode plate (2), a porous transmission layer (5) is arranged between the anode plate (1) and the membrane electrode (3), a gas diffusion layer (6) is arranged between the cathode plate (2) and the membrane electrode (3), the porous transmission layer (5) and the gas diffusion layer (6) are arranged at the flow channel area (15) in the center of the anode plate (1) and the cathode plate (2), respectively, and the porous transmission layer (5) and the gas diffusion layer (6) are arranged at the flow channel area (15) in the center of the anode plate (1) and the cathode plate (2), respectively. The outer periphery of the layer (5) and the gas diffusion layer (6) is provided with a sealing gasket (4); the anode plate (1) is provided with a water inlet (12), a water outlet (13) and a hydrogen outlet (14) at the four corners of the flow channel area (15); each group of single cells is fastened together by a buckle (10); at least two groups of single cells are connected in series in sequence to form a multi-cell; the outer sides of the anode plate (1) and the cathode plate (2) on the outer side of the multi-cell are respectively provided with an anode power-on plate (8-1) and a cathode power-on plate (8-2); the anode power-on plate (8-1), the cathode power-on plate (8-2) and the multi-cell are connected together to form a water electrolysis test fixture.
2. The proton exchange membrane water electrolysis test fixture structure according to claim 1, characterized in that: The upper and lower sides of the backs of the anode plate (1) and the cathode plate (2) are both provided with grooves, the grooves extending in the horizontal direction, buckle reserved holes (11) are respectively provided on both sides of the inside of the grooves, and the buckle strips of the buckles (10) fasten the anode plate (1) and the cathode plate (2) into one body via the buckle reserved holes (11).
3. The proton exchange membrane water electrolysis test fixture structure as claimed in claim 2, characterized in that: The grooves located on the upper and lower sides of the anode plate (1) and the cathode plate (2) have gaps from the top and bottom of the plates respectively, the buckle reserved holes (11) on both sides of the inside of the grooves are arranged in pairs, and the thickness of the two ends of the buckle (10) is less than the depth of the groove.
4. The proton exchange membrane water electrolysis test fixture structure as claimed in claim 1, 2 or 3, characterized in that: The outer sides of the anode power-on plate (8-1) and the cathode power-on plate (8-2) are both provided with end plates (7), and the end plates (7) are connected with positioning pins. The anode power-on plate (8-1), the cathode power-on plate (8-2) and the multi-battery are pressed and bonded together through the end plates (7) and the positioning pins to form a water electrolysis test fixture.
5. The proton exchange membrane water electrolysis test fixture structure as claimed in claim 1, 2 or 3, characterized in that: The middle of the sealing gasket (4) is hollow relative to the flow channel region (15) of the electrode plate, and the thicknesses of the porous transmission layer (5) and the gas diffusion layer (6) are both thinner than the sealing gasket (4).