A carbon paper compression drainage test tool for hydrogen fuel cells
By designing a carbon paper compression drainage test tool including upper and lower modules, the problem of difficult testing of the drainage of carbon paper in the membrane electrode in the prior art is solved, and direct observation of carbon paper at different compression rates is achieved, reducing the The cost and cycle of hydrogen fuel cell design.
Patent Information
- Application Number
- CN202110131186.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-01-30
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2041-01-30
AI Technical Summary
The prior art lacks a device to directly test the drainage of membrane electrode carbon paper at different compression rates, resulting in high design cost and long cycles of hydrogen fuel cells.
Design a carbon paper compression drainage test tool including upper and lower modules. The upper and lower modules are fixed by fastening bolts and nuts, and the runner structure, water inlet, water outlet, ventilation port and pressure test port are set to form a test The observation window is convenient for observing the drainage of carbon paper at different compression rates.
Direct observation of carbon paper at different compression rates is achieved, the cost and R&D cycle of hydrogen fuel cell design is reduced, and the stability and operation convenience of the test structure are improved.
Smart Images
Figure CN114839115B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of hydrogen fuel cells, and in particular to a carbon paper compression drainage test tool for hydrogen fuel cells. Background Art
[0002] When designing hydrogen fuel cells, different membrane electrode carbon papers need to be selected according to different hydrophobic properties, and the same membrane electrode carbon paper has different drainage conditions at different compression rates. Currently, the selection of membrane electrode carbon paper is usually based on experience, and then actual performance tests are performed on samples, resulting in higher design costs and longer cycles. As a result, the market lacks a device that can directly test the drainage conditions of membrane electrode carbon paper at different compression rates. Summary of the invention
[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a carbon paper compression drainage test tool for a hydrogen fuel cell, which is convenient for directly observing the drainage conditions under the flow channel ridges of the carbon paper at different compression rates and judging the differences in the hydrophobic properties of the carbon paper.
[0004] The purpose of the present invention can be achieved by the following technical solutions:
[0005] A carbon paper compression drainage test fixture for a hydrogen fuel cell comprises an upper module, a lower module, fastening bolts and nuts. The upper module and the lower module are provided with guide holes at four corners. The fastening bolts pass through the guide holes of the lower module and the upper module in turn and are connected with nuts to fix the upper module and the lower module to each other.
[0006] The lower surface of the upper module is provided with a flow channel structure, and the top surface or side surface of the upper module is provided with a water inlet, a water outlet, a vent and a pressure test port connected to the flow channel structure. The flow channel structure is close to one end of the upper module, and the end is the first observation end.
[0007] The upper surface of the lower module is provided with a placement groove corresponding to the position of the flow channel structure, and one side of the placement groove extends to one side end of the lower module, which end is the second observation end. The first observation end and the second observation end together constitute a test observation window, and a transparent protective plate is provided on the outside of the observation window to seal the test observation window. The carbon paper to be tested is clamped between the flow channel structure and the placement groove.
[0008] Furthermore, the upper module and the lower module are both "concave" shaped parts, and the first observation end and the second observation end are both located at the concave bottom edge of the "concave" shaped part.
[0009] Furthermore, the upper module is transparent as a whole.
[0010] Furthermore, the upper module includes a water inlet, a water outlet, two air vents and two pressure test ports, the water inlet is located on the top surface of the upper module, the water outlet is located on the opposite end surface of the first observation end, and the two air vents and two pressure test ports are symmetrically distributed on the two sides of the upper module.
[0011] Furthermore, a protruding block is provided on the first observation end, and the water inlet is arranged on the protruding block.
[0012] Furthermore, the protruding block is semicircular or trapezoidal.
[0013] Furthermore, at least two positioning pins are provided on the lower surface of the upper module, and positioning holes corresponding to the positions of the positioning pins are provided on the upper surface of the lower module.
[0014] Furthermore, a washer sleeved on the fastening bolt is provided between the upper module and the lower module.
[0015] Furthermore, the lower module is made of a metal block.
[0016] Furthermore, the transparent protective plate is a plexiglass plate or a transparent plastic plate.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. The present invention performs direct compression test on carbon paper through the upper module and the lower module, and provides a test observation window, so as to realize direct observation of the drainage of carbon paper at different compression rates, which is convenient for the design and selection of subsequent hydrogen fuel cells, effectively reduces the design cost, and shortens the research and development cycle.
[0019] 2. Both the upper module and the lower module are "concave" shaped parts, which makes it easy to place the microscope lens against the concave part to improve the structural stability during testing.
[0020] 3. A protruding block is provided on the first observation end of the upper module, and the water inlet is arranged on the protruding block, so that the channel connecting the water inlet to the flow channel structure can be as close as possible to the outermost edge of the flow channel structure, thereby making it easier to observe the reaction of the carbon paper.
[0021] 4. The upper module is transparent as a whole, which makes it easy to directly observe the gas and water flow conditions, making the tooling easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of the present invention.
[0023] Figure 2 It is a structural schematic diagram of the present invention from another angle.
[0024] Figure 3 This is a structural diagram of the upper module.
[0025] Figure 4 This is a structural diagram of the upper module from another angle.
[0026] Figure 5 This is a schematic diagram of the structure of the following module.
[0027] Figure 6 It is a schematic diagram of the explosion structure of the present invention.
[0028] Figure numerals: 1. upper module, 11. flow channel structure, 12. water inlet, 13. water outlet, 14. vent, 15. pressure test port, 16. first observation end, 17. positioning pin, 2. lower module, 21. placement groove, 22. second observation end, 23. positioning hole, 3. fastening bolt, 4. nut, 5. protrusion, 6. transparent protective plate. DETAILED DESCRIPTION
[0029] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0030] like Figure 1 , Figure 2 and Figure 6 As shown, this embodiment discloses a carbon paper compression drainage test fixture for a hydrogen fuel cell, comprising an upper module 1, a lower module 2, fastening bolts 3 and nuts 4. Guide holes are provided at the four corners of the upper module 1 and the lower module 2. Four fastening bolts 3 pass through the guide holes of the lower module 2 and the upper module 1 from bottom to top in sequence and then connect with nuts 4 to fix the upper module 1 and the lower module 2 to each other. A washer is provided between the upper module 1 and the lower module 2 and is sleeved on the fastening bolts 3.
[0031] like Figure 3 and Figure 4As shown, a flow channel structure 11 is provided on the lower surface of the upper module 1, and a water inlet 12, a water outlet 13, a vent 14 and a pressure test port 15 connected to the flow channel structure 11 are provided on the top surface or side surface of the upper module 1. The flow channel structure 11 is close to one side end of the upper module 1, and the end is the first observation end 16. Specifically, the upper module 1 includes a water inlet 12, a water outlet 13, two vents and two pressure test ports 15. The water inlet 12 is located on the top surface of the upper module 1, the water outlet 13 is located on the opposite end surface of the first observation end 16, and the two vents 14 and the two pressure test ports 15 are symmetrically distributed on the two sides of the upper module 1. The upper module 1 is a "concave" shaped part, and the first observation end 16 is the "concave" concave bottom edge part. A semicircular or trapezoidal protrusion block 15 is also provided on the concave end, and the water inlet 12 is arranged on the protrusion block 15. The raised block 15 is to make the channel connecting the water inlet 12 to the flow channel structure 11 as close as possible to the edge of the flow channel structure 11, that is, close to the first observation end 16, so as to make it easier to observe the drainage reaction of the carbon paper. The upper module 1 is made of transparent materials such as acrylic or transparent plastic, which is convenient for directly observing the gas and water flow in the internal flow channel, making the tooling easier to operate.
[0032] like Figure 5 and Figure 6 As shown, the lower module 2 is a "concave" shaped part that matches the overall shape of the upper module 1. The upper surface of the lower module 2 is provided with a placement groove 21 corresponding to the position of the flow channel structure 11. One side of the placement groove 21 extends to the concave bottom edge of the "concave" shaped part, which is the second observation end 22 on the lower module 2. The lower module 2 is made of a metal block, such as stainless steel, aluminum alloy, titanium alloy, etc., to ensure the mechanical strength of the entire tooling. The first observation end 16 and the second observation end 22 of the upper module 1 together constitute a test observation window, and a transparent protective plate 6 is provided on the outside of the test observation window to form a seal for the test observation window. The transparent protective plate 6 is generally a plexiglass plate or a transparent plastic plate, preferably plexiglass. The sealing form can be a dispensing seal, a silicone sealing ring, a transparent film gasket, etc., and the specific form is not limited. As a result, the carbon paper to be tested is clamped between the flow channel structure 11 and the placement groove 21, and the carbon paper can be observed in real time through the test observation window.
[0033] like Figure 4 and Figure 5 As shown, at least two positioning pins 17 are provided on the lower surface of the upper module 1, preferably two in this embodiment. The upper surface of the lower module 2 is provided with positioning holes 23 corresponding to the positions of the positioning pins 17, so as to facilitate the quick matching and positioning of the upper module 1 and the lower module 2.
[0034] In this embodiment, the upper module 1 and the lower module 2 together form a concave-shaped part after being assembled, and the concave part can be used to fit an external microscope to improve the structural stability during testing.
[0035] The use process of this embodiment is as follows: the carbon paper to be tested is placed in the placement groove 21 of the lower module 2, and after the upper module 1 is covered on the lower module 2, the flow channel structure 11 of the upper module 1 presses the upper surface of the carbon paper. The flow channel structure 11 and the outer ring of the placement groove 21 have a conventional mutually interlocking sealing structure, which will not be described in detail here. At this time, the gasket between the upper module 1 and the lower module 2 plays a preliminary supporting role. Then the external microscope is embedded in the recessed test observation window, and the microscope fits the transparent protective plate 6. When testing, by tightening the nut 4, the upper module 1 and the lower module 2 are brought together to compress the gasket, and the carbon paper is compressed at the same time. Then, ventilation, water flow and pressure monitoring are performed in the upper module 1 to simulate the gas supply of the fuel cell reaction, so as to effectively observe and understand the drainage of the carbon paper to be tested under different compression rates, which is convenient for the subsequent design and selection of hydrogen fuel cells, effectively reducing design costs and shortening the research and development cycle.
[0036] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.
Claims
1. A carbon paper compression drainage test tool for a hydrogen fuel cell, characterized in that: The invention comprises an upper module (1), a lower module (2), a fastening bolt (3) and a nut (4), wherein the four corners of the upper module (1) and the lower module (2) are provided with guide holes, and the fastening bolt (3) passes through the guide holes of the lower module (2) and the upper module (1) in sequence and then connects with the nut (4), thereby fixing the upper module (1) and the lower module (2) to each other. The lower surface of the upper module (1) is provided with a flow channel structure (11); a water inlet (12), a water outlet (13), a vent (14) and a pressure test port (15) communicating with the flow channel structure (11) are provided on the top surface or the side surface of the upper module (1); the flow channel structure (11) is close to one end of the upper module (1), and the end is a first observation end (16). The upper surface of the lower module (2) is provided with a placement groove (21) corresponding to the position of the flow channel structure (11); one side of the placement groove (21) extends to one end of the lower module (2), which end is a second observation end (22); the first observation end (16) and the second observation end (22) together form a test observation window; and a transparent protective plate (6) is provided on the outside of the observation window to form a seal for the test observation window; the carbon paper to be tested is clamped between the flow channel structure (11) and the placement groove (21).
2. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The upper module (1) and the lower module (2) are both "concave" shaped parts, and the first observation end (16) and the second observation end (22) are both located at the concave bottom edge of the "concave" shaped part.
3. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The upper module (1) is transparent as a whole.
4. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The upper module (1) comprises a water inlet (12), a water outlet (13), two vents (14) and two pressure test ports (15); the water inlet (12) is located on the top surface of the upper module (1); the water outlet (13) is located on the end surface opposite to the first observation end (16); the two vents (14) and the two pressure test ports (15) are symmetrically distributed on two side surfaces of the upper module (1).
5. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 4, characterized in that: A protruding block (5) is provided on the first observation end (16), and the water inlet (12) is arranged on the protruding block (5).
6. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 5, characterized in that: The protruding block (5) is semicircular or trapezoidal.
7. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The lower surface of the upper module (1) is provided with at least two positioning pins (17), and the upper surface of the lower module (2) is provided with positioning holes (23) corresponding to the positions of the positioning pins (17).
8. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: A washer sleeved on the fastening bolt (3) is provided between the upper module (1) and the lower module (2).
9. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The lower module (2) is made of a metal block.
10. The carbon paper compression drainage test tool for a hydrogen fuel cell according to claim 1, characterized in that: The transparent protective plate (6) is a plexiglass plate or a transparent plastic plate.