Membrane electrode airtightness test fixture

Abstract

The utility model discloses a membrane electrode airtightness test fixture, which is simple in structure, low in manufacturing cost and simple to operate, and reduces the equipment cost and the labor cost of enterprises. The device comprises an upper jig plate, the upper jig plate comprises an upper jig plate body, the central area of the lower surface of the upper jig plate body is used for pressing and attaching the upper surface of a membrane electrode to be detected, and a first sealing ring is embedded in the central area of the lower surface of the upper jig plate body; the lower jig plate comprises a lower jig plate body, a plurality of positioning blocks protruding upwards are annularly distributed on the periphery of a central area of the lower jig plate body, a positioning area formed by enclosing all the positioning blocks is arranged in a shape of a membrane electrode to be detected, and the positioning area is used for supporting the lower surface of the membrane electrode to be detected; a second sealing ring is embedded in the center of the positioning area of the lower jig plate body.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane battery testing, in particular to a membrane electrode airtightness testing fixture. Background Art

[0002] The membrane electrode is composed of an anode gas diffusion layer, an anode catalyst layer, an electrolyte membrane (proton exchange membrane), a cathode catalyst, and a cathode gas diffusion layer. After the membrane electrode is manufactured, it needs to be tested for air tightness. The existing air tightness test structure is complex and its production cost is high. Moreover, since different types of membrane electrodes require different types of air tightness test devices, the cost of membrane electrode testing is too high, which is not conducive to cost reduction and efficiency improvement of enterprises. Utility Model Content

[0003] In response to the above problems, the present invention provides a membrane electrode airtightness test fixture, which has a simple structure, low production cost, and simple operation, thereby reducing the equipment cost and labor cost of the enterprise.

[0004] A membrane electrode airtightness test fixture, characterized in that it comprises:

[0005] An upper jig plate, comprising an upper jig plate body, wherein the center area of the lower surface of the upper jig plate body is used for pressing the upper surface of the membrane electrode to be tested, and the center area of the lower surface of the upper jig plate body is also embedded with a first sealing ring;

[0006] and a lower fixture plate, comprising a lower fixture plate body, wherein a plurality of upwardly convex positioning blocks are arranged around the periphery of a central area of the lower fixture plate body, wherein a positioning area formed by all the positioning blocks is arranged in the shape of the membrane electrode to be tested, wherein the positioning area is used to support the lower surface of the membrane electrode to be tested, and a second sealing ring is embedded in the central portion of the positioning area of the lower fixture plate body;

[0007] The upper jig plate is lifted and lowered relative to the lower jig plate to perform mold opening and closing operations. In the mold closing state, the upper surface of the sealing detection area of the membrane electrode to be inspected is in contact with the lower surface of the first sealing ring. In the mold closing state, the lower surface of the sealing detection area of the membrane electrode to be inspected is in contact with the lower surface of the second sealing ring.

[0008] A first hole is formed in the upper jig plate body in the area corresponding to the first sealing ring and passes through the upper jig plate body in the thickness direction;

[0009] A second hole penetrating in the thickness direction is opened in the surface area of the lower fixture plate body corresponding to the second sealing ring.

[0010] It is further characterized by:

[0011] It also includes a test inflation device and a gas flow meter. In the mold closing state, the first sealing ring is attached to the upper surface of the sealing detection area of the membrane electrode to be tested, and the second sealing ring is attached to the lower surface of the sealing detection area of the membrane electrode to be tested;

[0012] The first hole is externally connected to the gas outlet pipe of the test inflation device, and the second hole is externally connected to the gas flow meter through a pipe;

[0013] Or the second hole is externally connected to the gas outlet pipeline of the test inflation device, and the first hole is externally connected to the gas flow meter through the pipeline;

[0014] Spring pins are respectively embedded in the four corners of the central area of the lower surface of the upper jig plate body. The spring pins are respectively arranged in the peripheral area of the first sealing ring. The lower ends of the spring pins are concave in the guide holes in the mold closing state, and the lower ends of the spring pins are convex on the lower surface of the upper jig plate body in the mold opening state.

[0015] The upper jig plate body is configured to imitate the shape of the lower jig plate body in a plan view;

[0016] The upper jig plate body is provided with a through guide hole corresponding to the position of each positioning block. The shape of the through guide hole is similar to the top view shape of the positioning block, ensuring that the positioning block is reliably inserted into the corresponding through guide hole in the mold closing state;

[0017] The number of the first holes is M, where M is a natural number greater than or equal to 2, and the number of the second holes is 1;

[0018] The outer peripheral portions of the outer facing surfaces of the lower jig plate body and the upper jig plate body are respectively provided with a plurality of guide through holes, and corresponding guide columns or linear bearings are inserted into the guide through holes at corresponding positions to facilitate reliable lifting and lowering movement of the upper jig plate relative to the lower jig plate;

[0019] One of the corners of the upper surface of the lower jig plate body is provided with positioning bosses, and the lower surface of the upper jig plate is provided with positioning holes corresponding to the positions of the positioning bosses. The positioning bosses are inserted into the positioning holes in the mold closing state, so that the upper jig plate and the lower jig plate can be quickly and reliably aligned.

[0020] After adopting the above technical solution, the jig is fixed on the airtight testing machine, and the membrane electrode to be tested is placed in the positioning area formed by the positioning block. Then the upper jig plate and the lower jig plate are pressed together, and the first sealing ring and the second sealing ring form a fitting seal on the sealing detection area of the membrane electrode to be tested to prevent gas from leaking from the edge. Nitrogen is introduced from the first hole or the second hole, and the other set of holes is connected to the flow meter to determine whether the product is leaking by calculating the flow value. The material of the upper jig plate and the lower jig plate is aluminum alloy, which is light in weight and easy to take. It adopts double-layer sealing rings of the upper and lower plates for sealing, and has good sealing performance. In addition, the surface of the upper jig plate and the lower jig plate is anodized to make it wear-resistant and corrosion-resistant. It has a simple structure, low production cost, and simple operation, which reduces the equipment cost and labor cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a perspective exploded schematic diagram of the present utility model;

[0022] Figure 2 This is a three-dimensional diagram of the utility model in the mold opening state;

[0023] Figure 3 This is a side view of the utility model in the mold opening state;

[0024] Figure 4 for Figure 3 AA cross-sectional view;

[0025] Figure 5 for Figure 3 BB cross-sectional view;

[0026] Figure 6 This is a three-dimensional schematic diagram of the membrane electrode to be tested placed on the lower fixture plate;

[0027] The names corresponding to the serial numbers in the figure are as follows:

[0028] Guide through hole 1;

[0029] Upper jig plate 10, upper jig plate body 11, first sealing ring 12, first hole 13, spring pin 14, upper locking bolt 141, middle linear spring 142, lower telescopic end 143, upper locking bolt 141, guide hole 15, upper threaded hole 151, lower small hole 152, through guide hole 16, positioning hole 17, lower jig plate 20, lower jig plate body 21, positioning block 22, positioning area 23, second sealing ring 24, second hole 25, positioning boss 26, membrane electrode 30. DETAILED DESCRIPTION

[0030] A membrane electrode airtight test fixture, see Figures 1-6 , which includes an upper jig plate 10 and a lower jig plate 20;

[0031] The upper fixture plate 10 includes an upper fixture plate body 11. The center area of the lower surface of the upper fixture plate body 11 is used to press the upper surface of the membrane electrode 30 to be tested. The center area of the lower surface of the upper fixture plate body 10 is also embedded with a first sealing ring 12.

[0032] The lower fixture plate 20 includes a lower fixture plate body 21. A plurality of upwardly protruding positioning blocks 22 are arranged around the periphery of the central area of the lower fixture plate body 21. The positioning area 23 formed by all the positioning blocks 22 is arranged according to the shape of the membrane electrode 30 to be tested, ensuring that the membrane electrode 30 to be tested is quickly, accurately and reliably arranged within the positioning area 23. The positioning area 23 is used to support the lower surface of the membrane electrode 30 to be tested. A second sealing ring 24 is embedded in the central part of the positioning area 23 of the lower fixture plate body 21.

[0033] The upper fixture plate 10 is raised and lowered relative to the lower fixture plate 20 to perform mold opening and closing operations. In the mold closing state, the upper surface of the sealing detection area of the membrane electrode 30 to be inspected is in contact with the lower surface of the first sealing ring 12. In the mold closing state, the lower surface of the sealing detection area of the membrane electrode 30 to be inspected is in contact with the lower surface of the second sealing ring 24.

[0034] A plurality of first holes 13 are formed in the area of the upper fixture plate body 11 corresponding to the first sealing ring 12 and extending through the upper fixture plate body 11 in the thickness direction.

[0035] A plurality of second holes 25 penetrating in the thickness direction are formed in the surface area of the lower fixture plate body 21 corresponding to the second sealing ring 24 .

[0036] In a specific implementation, a test inflation device (not shown in the figure, belonging to mature technology) and a gas flow meter (not shown in the figure, belonging to mature technology) are also included. In the mold closing state, the first sealing ring 12 is attached to the upper surface of the sealing detection area of the membrane electrode 30 to be tested, and the second sealing ring 24 is attached to the lower surface of the sealing detection area of the membrane electrode 30 to be tested;

[0037] The number of the first holes is three, and the three first holes 13 are arranged in a straight line and spaced apart. The number of the second hole 25 is one, ensuring that the air tightness can be reliably tested.

[0038] The first sealing ring 12 and the second sealing ring 24 are identical sealing rings, and are both embedded in corresponding sealing ring installation grooves to ensure convenient and reliable installation of the sealing rings;

[0039] All first holes 13 are externally connected to the gas outlet pipeline of the test inflation device, and all second holes 25 are externally connected to the gas flow meter through the pipeline.

[0040] During specific implementation, spring pins 14 are respectively embedded in the four corners of the central area of the lower surface of the upper jig plate body 11. The spring pins 14 are respectively arranged in the outer area of the first sealing ring 12. The spring pin 14 includes an upper locking bolt 141, a middle linear spring 142, and a lower telescopic end 143. The upper locking bolt 141 locks the upper threaded hole 151 of the guide hole 15, and the lower telescopic end 143 passes through the lower small hole 152 of the guide hole 15. The lower telescopic end 143 of the spring pin 14 protrudes downward from the lower surface of the upper jig plate body 11 in the open mold state, and the lower telescopic end 143 of the spring pin 14 is retracted into the guide hole 15 in the closed mold state.

[0041] In a specific embodiment, the upper jig plate body 11 is configured to imitate the top view shape of the lower jig plate body 21;

[0042] The upper jig plate body 11 is provided with a through guide hole 16 corresponding to the position of each positioning block 22. The shape of the through guide hole 16 is set to imitate the top view shape of the positioning block 22 to ensure that the positioning block 22 is reliably inserted into the corresponding through guide hole 16 in the mold closing state.

[0043] In a specific implementation, the outer peripheral portions of the outer facing surfaces of the lower jig plate body 21 and the upper jig plate body 11 are respectively provided with a plurality of guide through holes 1, and corresponding guide pins or linear bearings (not shown in the figure, belonging to the conventional structure of the mold) are inserted into the guide through holes 1 at the corresponding positions, so as to facilitate the reliable lifting and lowering movement of the upper jig plate 10 relative to the lower jig plate 20;

[0044] Positioning bosses 26 are provided at one of the corners of the upper surface of the lower jig plate body 21, and positioning holes 17 are provided on the lower surface of the upper jig plate body 11 corresponding to the positions of the positioning bosses 26. In the mold closing state, the positioning bosses 26 are inserted into the positioning holes 17, so that the upper jig plate 10 and the lower jig plate 20 can be quickly and reliably aligned.

[0045] In specific implementation, the material of the upper jig plate 10 and the lower jig plate 20 is aluminum alloy, which is lightweight; the surfaces of the upper jig plate 10 and the lower jig plate 20 are anodized to make them highly wear-resistant and corrosion-resistant.

[0046] Its working principle is as follows: the jig is fixed on the airtight testing machine, and the membrane electrode to be tested is placed in the positioning area formed by the positioning block. Then the upper jig plate and the lower jig plate are pressed together, and the first sealing ring and the second sealing ring form a fitting seal on the sealing detection area of the membrane electrode to be tested to prevent gas from leaking from the edge. Nitrogen is introduced from the first hole and the second hole. The second hole is connected to the gas flow meter, and the flow value is calculated to determine whether the product is leaking. The material of the upper jig plate and the lower jig plate is aluminum alloy, which is light and easy to take. It adopts double-layer sealing rings of the upper and lower plates for sealing, and its sealing performance is good. In addition, the surface of the upper jig plate and the lower jig plate is anodized to make it wear-resistant and corrosion-resistant. It has a simple structure, low production cost, and simple operation, which reduces the equipment cost and labor cost of the enterprise.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A membrane electrode airtightness test fixture, characterized in that: It includes: An upper jig plate, comprising an upper jig plate body, wherein the center area of the lower surface of the upper jig plate body is used for pressing the upper surface of the membrane electrode to be tested, and the center area of the lower surface of the upper jig plate body is also embedded with a first sealing ring; and a lower fixture plate, comprising a lower fixture plate body, wherein a plurality of upwardly convex positioning blocks are arranged around the periphery of a central area of the lower fixture plate body, wherein a positioning area formed by all the positioning blocks is arranged in the shape of the membrane electrode to be tested, wherein the positioning area is used to support the lower surface of the membrane electrode to be tested, and a second sealing ring is embedded in the central portion of the positioning area of the lower fixture plate body; The upper jig plate is lifted and lowered relative to the lower jig plate to perform mold opening and closing operations. In the mold closing state, the upper surface of the sealing detection area of the membrane electrode to be inspected is in contact with the lower surface of the first sealing ring. In the mold closing state, the lower surface of the sealing detection area of the membrane electrode to be inspected is in contact with the lower surface of the second sealing ring. A first hole is formed in the upper jig plate body in the area corresponding to the first sealing ring and passes through the upper jig plate body in the thickness direction; A second hole penetrating in the thickness direction is opened in the surface area of the lower fixture plate body corresponding to the second sealing ring.

2. The membrane electrode airtightness test fixture according to claim 1, characterized in that: It also includes a test inflation device and a gas flow meter. In the mold closing state, the first sealing ring is attached to the upper surface of the sealing detection area of the membrane electrode to be tested, and the second sealing ring is attached to the lower surface of the sealing detection area of the membrane electrode to be tested.

3. The membrane electrode airtightness test fixture according to claim 2, characterized in that: The first hole is externally connected to the gas outlet pipeline of the test inflation device, and the second hole is externally connected to the gas flow meter through the pipeline.

4. The membrane electrode airtightness test fixture according to claim 2, characterized in that: The second hole is externally connected to the gas outlet pipeline of the test inflation device, and the first hole is externally connected to the gas flow meter through the pipeline.

5. The membrane electrode airtightness test fixture according to claim 1, characterized in that: Spring pins are respectively embedded in the four corners of the central area of the lower surface of the upper jig plate body, and the spring pins are respectively arranged in the outer area of the first sealing ring. The lower ends of the spring pins are recessed in the guide holes in the mold closing state, and the lower ends of the spring pins are convex on the lower surface of the upper jig plate body in the mold opening state.

6. The membrane electrode airtightness test fixture according to claim 1, characterized in that: The upper jig plate body is configured to imitate the shape of the lower jig plate body in a plan view.

7. The membrane electrode airtightness test fixture according to claim 1, characterized in that: The upper jig plate body is provided with a through guide hole corresponding to the position of each positioning block, and the shape of the through guide hole is arranged to imitate the top view shape of the positioning block.

8. The membrane electrode airtightness test fixture according to claim 1, characterized in that: The number of the first holes is M, where M is a natural number greater than or equal to 2, and the number of the second holes is 1.

9. The membrane electrode airtightness test fixture according to claim 1, characterized in that: The outer peripheral portions of the outer facing surfaces of the lower jig plate body and the upper jig plate body are respectively provided with a plurality of guide through holes, and corresponding guide columns or linear bearings are inserted into the guide through holes at corresponding positions.

10. The membrane electrode airtightness test fixture according to claim 1, characterized in that: One of the corners of the upper surface of the lower jig plate body is provided with positioning bosses, and the lower surface of the upper jig plate is provided with positioning holes corresponding to the positions of the positioning bosses. The positioning bosses are inserted into the positioning holes in the mold closing state.

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