Clamp for testing fuel cell or electrolyzed water membrane electrode

Abstract

The utility model relates to the technical field of proton exchange membrane fuel cells, PEM electrolytic cells and AEM electrolytic cells, and discloses a clamp for fuel cell or electrolytic water membrane electrode testing, which comprises a first polar plate sleeve shell fixedly mounted at the top of a frame, and a first magnetic positioning pin is arranged on the first polar plate sleeve shell; the second polar plate sleeve shell is positioned below the first polar plate sleeve shell, and a second magnetic positioning pin is arranged on the second polar plate sleeve shell; the test pool is arranged between the first polar plate sleeve shell and the second polar plate sleeve shell, and is positioned through the first magnetic positioning pin and the second magnetic positioning pin; and the air cylinder is arranged in the shell, is positioned at the bottom of the second polar plate sleeve shell, and is controlled by a first button and a second button. Jacking is conducted through the air cylinder top, pressure can be evenly applied to the testing pool, starting of the air cylinder is controlled through the first button and the second button at the same time, and mistaken touch is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to proton exchange membrane fuel cell, PEM electrolytic tank, AEM electrolytic tank technical field, more specifically, especially, it is a kind of clamp for fuel cell or electrolytic water membrane electrode test. BACKGROUND

[0002] To test the performance of membrane electrode, the conventional test fixture adopts the mode of fastening by multiple bolts, however, the mode of fastening by bolt has the problem of inconsistent locking force of each bolt, which leads to uneven stress of membrane electrode and the phenomenon of excessive contact resistance and inaccurate test performance;And it is difficult to ensure the consistency of bolt locking force in each test when repeated testing, which leads to poor repeatability of test results. The patent with publication number CN216595223U discloses a fuel cell test fixture, which contains a cylinder, a fixture base and an end plate, and uses a cylinder instead of a bolt for clamping and fixing. And the design adopts a lever-type cylinder switch design, which can switch between cylinder locking and opening.

[0003] In this design, the pressure of the cylinder cannot be observed in real time, and the pressure regulation has insufficient precision, and the lever-type switch design is easy to be accidentally touched, which may cause the fixture to be opened during testing or closed during assembly, posing a safety risk.

[0004] Therefore, a test fixture that can evenly stress the membrane electrode and prevent accidental touch is needed for the performance testing of membrane electrode single cell or short stack of proton exchange membrane fuel cell, PEM electrolytic tank and AEM electrolytic tank. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of clamp for fuel cell or electrolytic water membrane electrode test, to solve the problems existing in prior art, by setting first magnetic positioning pin and second magnetic positioning pin can be fixed and positioned to test pool, it is convenient to disassemble test pool simultaneously, using cylinder top jacking, it is convenient to apply pressure to test pool evenly, using first button and second button simultaneously control the start of cylinder, avoid accidental touch.

[0006] To achieve the above object, the utility model provides the following scheme: the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, first polar plate sleeve shell, the first polar plate sleeve shell is fixed in frame top, first magnetic positioning pin is provided on the first polar plate sleeve shell;Second polar plate sleeve shell, the second polar plate sleeve shell is located below the first polar plate sleeve shell, second magnetic positioning pin is provided on the second polar plate sleeve shell;Test pool, the test pool is installed between the first polar plate sleeve shell and the second polar plate sleeve shell, and is positioned by the first magnetic positioning pin and the second magnetic positioning pin;Cylinder, the cylinder is located at the bottom of the second polar plate sleeve shell, and the cylinder is controlled by first button and second button.

[0007] According to the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, the test pool includes first single polar plate and second single polar plate, the first single polar plate is installed in the first polar plate sleeve shell, the second single polar plate is installed in the second polar plate sleeve shell, membrane electrode assembly is clamped between the first single polar plate and second single polar plate.

[0008] According to the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, the first single polar plate is fixed in the first polar plate housing by the first magnetic positioning pin, and the second single polar plate is fixed in the second polar plate housing by the second magnetic positioning pin.

[0009] According to the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, the cylinder is located in the shell, the shell is fixedly connected on base, the first button and the second button are installed on the shell, and the first button and the second button simultaneously control the start or close of the cylinder.

[0010] According to the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, the cylinder top is connected with cylinder top head, and the cylinder top head is connected to the bottom of the second polar plate sleeve shell.

[0011] According to the utility model provides a kind of clamp for fuel cell or water electrolysis membrane electrode test, the shell is provided with throttle valve and pressure regulating valve, the throttle valve is used to adjust the speed of the cylinder, and the pressure regulating valve is connected with digital pressure gauge.

[0012] The utility model discloses the following technical effects:

[0013] In this device, the first and second electrode shells are magnetically engaged by a first and a second magnetic locating pin to fix and position the test cell. This makes the test cell more stable in the fixture and facilitates its replacement and repeated testing. Magnetic engagement replaces conventional pipe fixing, making operation more convenient. A cylinder lifts and moves the second electrode shell up and down, compressing the test cell and providing more uniform force. This effectively avoids uneven force on the membrane electrode within the test cell and allows for precise pressure adjustment. The cylinder is controlled by both a first and a second button to start or stop, preventing accidental opening of the test cell during testing, which could lead to test interruption and hydrogen leakage. It also prevents accidental closing of the test cell during installation, reducing the risk of personnel injury from the cylinder and minimizing the risk of misoperation during testing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is the front view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure after the hidden frame is installed in this utility model;

[0019] Figure 5 This is an exploded view of the present invention;

[0020] The components are as follows: 1. Frame; 2. Battery; 3. First button; 4. Charging port; 5. Main switch; 6. Digital pressure gauge; 7. Second button; 8. Pressure regulating valve; 9. Base; 10. First single plate; 11. Second single plate; 12. First plate housing; 13. Second plate housing; 14. First magnetic positioning pin; 15. Second magnetic positioning pin; 16. First interface; 17. Second interface; 18. First current collector; 19. Second current collector; 20. Throttle valve; 21. Cylinder top; 22. Pad; 23. Cylinder. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-5 As shown, this utility model provides a fixture for testing electrodes of fuel cells or water electrolysis membranes, comprising: a first electrode shell 12, which is fixed to the top of a frame 1 and has a first magnetic positioning pin 14; a second electrode shell 13, which is located below the first electrode shell 12 and has a second magnetic positioning pin 15; a test cell, which is installed between the first electrode shell 12 and the second electrode shell 13 and positioned by the first magnetic positioning pin 14 and the second magnetic positioning pin 15; and a cylinder 23, which is located at the bottom of the second electrode shell 13 and is controlled by a first button 3 and a second button 7.

[0024] This device employs magnetic attraction clamping, magnetic positioning pin positioning, and a multi-layer nesting design. Without disassembling accessories, pipelines, circuits, or moving the fixture, the test cell of the fixture can be easily removed directly, and the sample to be tested can be quickly loaded and clamped. At the same time, the clamped test cell can be placed into the fixture by its own attraction positioning, enabling quick replacement of test samples and direct execution of subsequent testing steps.

[0025] By changing the test cell material, this fixture can perform membrane electrode testing for proton exchange membrane fuel cells, membrane electrode performance testing for PEM electrolyzers, and membrane electrode performance testing for AEM electrolyzers.

[0026] The test cell includes a first monopolar plate 10 and a second monopolar plate 11. The first monopolar plate 10 is installed in a first monopolar plate housing 12 and fixed by a first magnetic positioning pin 14. The second monopolar plate 11 is installed in a second monopolar plate housing 13 and fixed by a second magnetic positioning pin 15. The membrane electrode assembly is located between the first monopolar plate 10 and the second monopolar plate 11. The membrane electrode assembly is the sample in this embodiment, and it is clamped and pressed by the first monopolar plate 10 and the second monopolar plate 11. The first magnetic positioning pin 14 is disposed through the four corners of the first monopolar plate housing 12, and the second magnetic positioning pin 15 is disposed through the four corners of the second monopolar plate housing 13. The first magnetic positioning pin 14 and the second magnetic positioning pin 15 are symmetrically distributed. The first magnetic positioning pin 14 and the second magnetic positioning pin 15 can also position the first monopolar plate 10 and the second monopolar plate 11, preventing the membrane electrode from sliding and causing misalignment during assembly, thus improving the assembly efficiency of the test cell.

[0027] Sealing rings are installed on both the first monopole plate 10 and the second monopole plate 11, and sealing rings are installed on the first magnetic positioning pin 14 and the second magnetic positioning pin 15 to ensure the airtightness of the test cell.

[0028] The first electrode housing 12 is provided with a first interface 16, and the second electrode housing 13 is provided with a second interface 17. The first interface 16 and the second interface 17 are connected to hydrogen, air, and refrigerant interfaces, which facilitates the supply of hydrogen, air, or refrigerant to the test cell. This device can replace the first single electrode 10 and the second single electrode 11 with different flow field designs. The first interface 16 and the second interface 17 are for different hydrogen and air interfaces when using different flow field designs. The first interface 16 can be used with U-shaped flow field electrode plates, and the second interface 17 can be used with Z-shaped flow field electrode plates.

[0029] The first current collector 18 is connected to the top of the first electrode housing 12. An insulating head is bolted to the top of the first current collector 18, and a pad 22 is bolted to the top of the insulating head. The pad 22 is fixed to the top of the frame 1. The first current collector 18 is sealed to the first single electrode 10 through a sealing ring. A second current collector 19 is installed on the second electrode housing 13. The second electrode housing 13 is located at the bottom of the frame 1. An outer shell is fixed below the frame 1 and is fixedly installed on the base 9. A cylinder 23 is installed inside the outer shell.

[0030] The top of the cylinder 23 is connected to the second collector block 19 via the cylinder head 21. The second collector block 19 is connected to the second electrode shell 13. The cylinder 23 pushes the second collector block 19 out, causing the second electrode shell 13 to rise and apply pressure to the test cell.

[0031] In this device, pressure is applied to the test cell by lifting it with cylinder 23. This improves the consistency of the clamping force and prevents uneven pressure distribution from causing inconsistent contact resistance and damaging the membrane electrode. It also solves the problems of low assembly efficiency of currently used fixtures, which easily lead to uneven force on the membrane electrode and make it impossible to accurately and repeatedly test the membrane electrode performance. Therefore, it effectively improves the airtightness of the test cell and increases testing efficiency.

[0032] The outer casing is equipped with a first button 3 and a second button 7, which are forward or backward buttons and serve as the switch for cylinder 23. Pressing the first button 3 and the second button 7 simultaneously with both hands can control the opening or closing of cylinder 23. This can prevent accidental operation, prevent the test cell from being accidentally opened during testing, causing test interruption and hydrogen leakage, and prevent the risk of the installer's hand being pinched by cylinder 23 due to accidental closing during installation. This also reduces the risk of accidental operation during testing.

[0033] The first current collector 18 is provided with a first interface 16, and the second current collector 19 is provided with a second interface 17. The first interface 16 and the second interface 17 are connected to hydrogen, air, and refrigerant interfaces, which facilitates the supply of hydrogen, air, or refrigerant to the test cell. This device can replace the first monopolar plate 10 and the second monopolar plate 11 with different flow field designs. The first interface 16 and the second interface 17 are for different hydrogen and air interfaces when using different flow field designs. The first interface 16 can be used with a U-shaped flow field plate, and the second interface 17 can be used with a Z-shaped flow field plate.

[0034] The outer casing is equipped with a solenoid valve and an air inlet. In this embodiment, the solenoid valve is a five-way solenoid valve. The solenoid valve works in conjunction with the cylinder 23 to facilitate precise clamping and release of the test cell. The air inlet is connected to the gas distribution system to ensure that the gas is evenly distributed to the catalyst layer of the membrane electrode.

[0035] A throttle valve 20 is installed on the outer casing. In this embodiment, the throttle valve 20 is a forward speed regulating throttle valve 20, which is used to adjust the jacking speed of the cylinder 23 to avoid damage to the test cell caused by the cylinder 23 jacking rod moving too fast or with too much force.

[0036] The outer casing is equipped with a pressure regulating valve 8 and a digital pressure gauge 6. The assembly pressure of the test chamber can be set via the pressure regulating valve 8, and the assembly pressure can be visually observed via the digital pressure gauge 6. The power supply for the digital pressure gauge 6 is a battery 2 installed inside the casing, which is periodically charged via a single charging port 4. This device uses a digital pressure sensor to monitor the pressure of cylinder 23, and displays the pressure data in real time via the digital pressure gauge 6, ensuring the consistency of pressure in each test and the stability of pressure during the test.

[0037] The outer casing is equipped with a main switch 5, which controls the power supply to the digital pressure gauge 6, the first button 3, the second button 7, and the solenoid valve.

[0038] Working principle: In use, firstly, the first monopolar plate 10 is installed in the first monopolar plate housing 12, and the second monopolar plate 11 is installed in the second monopolar plate housing 13. The membrane electrode sample to be tested is placed on the installed second monopolar plate 11. The first monopolar plate 10 and the second monopolar plate 11 are assembled and magnetically fixed by the first magnetic positioning pin 14 and the second magnetic positioning pin 15 on their respective housings. Then, the test cell assembly is clamped and positioned by the magnetic positioning hole on the back of the housing of the second monopolar plate 11 (the second magnetic positioning pin 15 is embedded in the positioning hole and has a concave hole) and the second magnetic positioning pin 15 nested in the second current collector 19 (the second magnetic positioning pin 15 is embedded in the hole and protrudes). The second manifold 19 and cylinder head 21 are tightened with bolts. When the digital pressure gauge 6 reads 0 bar, the second manifold 19 is in the non-extended state. After the test cell is positioned, the main switch 5 is turned on, and the pressure regulating valve 8 is adjusted to the target pressure. Both hands simultaneously control the first button 3 and the second button 7 to start the cylinder 23. The second manifold 19 moves towards the test cell under the push of the cylinder head 21. The cylinder 23 pushes the second manifold 19 into close contact with the test cell, and the test cell into close contact with the first manifold 18. The pressure regulating valve 8 is adjusted until the pressure is stable. Then the gas path and electrical circuit of the test cell are connected to perform fuel cell testing.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A fixture for testing fuel cell or water electrolysis membrane electrodes, characterized in that, include: A first pole plate housing (12) is fixedly connected to the top of the frame (1), and a first magnetic positioning pin (14) is provided on the first pole plate housing (12); The second electrode shell (13) is located below the first electrode shell (12), and a second magnetic positioning pin (15) is provided on the second electrode shell (13). The test cell is installed between the first electrode shell (12) and the second electrode shell (13) and is positioned by the first magnetic positioning pin (14) and the second magnetic positioning pin (15). A cylinder (23) is installed inside the housing. The cylinder (23) is located at the bottom of the second electrode plate housing (13). The cylinder (23) is controlled by a first button (3) and a second button (7).

2. The fixture for testing fuel cell or water electrolysis membrane electrodes according to claim 1, characterized in that: The test cell includes a first monopolar plate (10) and a second monopolar plate (11). The first monopolar plate (10) is installed in the first plate housing (12), and the second monopolar plate (11) is installed in the second plate housing (13). A membrane electrode assembly is sandwiched between the first monopolar plate (10) and the second monopolar plate (11).

3. The fixture for testing fuel cell or water electrolysis membrane electrodes according to claim 2, characterized in that: The first monopole plate (10) is fixed inside the first electrode plate housing by the first magnetic positioning pin (14), and the second monopole plate (11) is fixed inside the second electrode plate housing by the second magnetic positioning pin (15).

4. The fixture for testing fuel cell or water electrolysis membrane electrodes according to claim 1, characterized in that: The cylinder (23) is located inside the housing, which is fixed to the base (9). The housing is equipped with the first button (3) and the second button (7), which simultaneously control the start or stop of the cylinder (23).

5. The fixture for testing fuel cell or water electrolysis membrane electrodes according to claim 4, characterized in that: The cylinder (23) is connected to a cylinder head (21) at the top, and the cylinder head (21) is connected to the bottom of the second electrode shell (13).

6. The fixture for testing fuel cell or water electrolysis membrane electrodes according to claim 5, characterized in that: The housing is provided with a throttle valve (20) and a pressure regulating valve (8). The throttle valve (20) is used to adjust the speed of the cylinder (23), and the pressure regulating valve (8) is connected to a digital pressure gauge (6).

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