Sealing performance testing device

Abstract

The invention relates to a sealing performance testing device. The sealing performance testing device comprises a supporting assembly, a clamping assembly and a fluid connector. The supporting assembly is used for supporting the clamping assembly and the bipolar plate; the clamping assembly is arranged between the supporting assembly and the bipolar plate and is used for clamping the end part of a fluid channel on the bipolar plate; the fluid connector is connected with the clamping assembly, abuts against the bipolar plate and is used for ventilating the fluid channel. Through cooperation of the supporting assembly and the clamping assembly, precise positioning of the bipolar plate is achieved, the planarity of test assembly is guaranteed, the test device can be suitable for bipolar plates of multiple sizes, and the applicability of the test device is improved; the clamping assembly provides a closed space for the fluid connector and the bipolar plate, leakage of the test fluid is avoided, and the accuracy of the test result and the convenience of the test process are improved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cells, and in particular to a sealing test device. Background Art

[0002] With the development of fuel cell technology, the airtightness detection technology of fuel cell bipolar plates has gradually become the focus of attention. Its characteristics are to ensure that fluids such as hydrogen, air and coolant inside the fuel cell flow safely in their respective working chambers to prevent leakage, thereby ensuring the stability and efficient operation of the fuel cell.

[0003] At present, most of the existing air tightness detection methods rely on customized test fixtures and equipment, and use complex positioning devices and sealing strips to perform gas detection. For example, an air tightness detection device that forms a closed cavity or a combination of a positioning cavity and a sealing strip is used for detection.

[0004] However, the above detection methods or related devices require the customization of special molds and sealing strips, which increases costs and is not easy to adapt to bipolar plates of different sizes or shapes. In addition, the detection results can usually only show the overall leakage situation, and cannot quickly and accurately locate the specific leakage site, resulting in time-consuming troubleshooting and low efficiency, which makes it difficult to meet the needs of rapid detection of fuel cells during the development and maintenance stages. Summary of the invention

[0005] Based on this, the present application provides a sealing test device for solving the problems of being unable to perform sealing tests on bipolar plates of fuel cells of different shapes and high testing costs.

[0006] In a first aspect, the present application provides a sealing test device, the device comprising:

[0007] A support assembly, used to support the clamping assembly and the bipolar plate;

[0008] A clamping assembly disposed between the support assembly and the bipolar plate and configured to clamp ends of the fluid channels on the bipolar plate; and

[0009] The fluid connector is connected to the clamping assembly and abuts against the bipolar plate and is used for ventilating the fluid channel.

[0010] In one embodiment, the support assembly includes two support units disposed opposite to each other at two ends of the bipolar plate, and the support units include:

[0011] A first support member, a second support member and a third support member, wherein the second support member and the third support member are adjustably connected to the first support member.

[0012] In one embodiment, the first support member is arranged along the vertical direction of the bipolar plate, and the outer side wall of the first support member is provided with grooves and bosses at intervals adjacent to each other.

[0013] In one embodiment, the second support member and the third support member are arranged parallel to the bipolar plate and are arranged opposite to each other on two opposite sides of the bipolar plate.

[0014] In one embodiment, the second support member comprises:

[0015] A connecting portion connected to the first supporting member;

[0016] The extending portion is connected to the connecting portion and extends toward the center of the bipolar plate.

[0017] In one embodiment, the clamping assembly includes:

[0018] a first clamping member, wherein a first surface of the first clamping member abuts against the bipolar plate;

[0019] The second clamping member has a first surface abutting against a second surface of the first clamping member, and the second surface of the second clamping member abutting against the extending portion.

[0020] In one embodiment, the second support member, the first clamping member, and the second clamping member are provided with through holes relative to the fluid connector;

[0021] The through hole is used for inserting the fluid connector so that the fluid connector abuts against the bipolar plate.

[0022] In one embodiment, the second support member is provided with an inserting hole, and the boss is provided with a mounting hole relative to the inserting hole.

[0023] In one of the embodiments, the clamping assembly further includes a third clamping member, which is inserted into the mounting hole through the insertion hole; the third clamping member is used to limit the positions of the first support member and the second support member.

[0024] In one embodiment, it also includes:

[0025] The fastener runs through the second support member and the clamping assembly and is used to limit the positions of the second support member and the clamping assembly.

[0026] The above-mentioned sealing test device limits the position state of the fuel cell bipolar plate through the support assembly and the clamping assembly, provides stable support, can move the bipolar plate during testing, or avoid deformation of the bipolar plate, thereby ensuring the accuracy of the test results; the fluid connector abuts the end of the bipolar plate fluid channel, and provides test fluid into the fluid channel to observe and detect the sealing of the fluid channel; the clamping assembly fits tightly with the end of the bipolar plate fluid channel to prevent the fluid from flowing out of the end of the fluid channel during operation of the fluid connector, thereby reducing the pressure in the fluid channel and making it impossible to accurately test the sealing of the bipolar plate; on the other hand, the support assembly and the clamping assembly can be adjusted in multiple dimensions according to the size of the bipolar plate, are easy to install, and are suitable for bipolar plates of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] FIG. 1 is a schematic structural diagram of a sealing test device in some embodiments of the present application.

[0029] FIG. 2 is a schematic structural diagram for illustrating the connection relationship among the first support member, the second support member, and the third support member in some embodiments of the present application.

[0030] FIG. 3 is a schematic structural diagram of a first supporting member in some embodiments of the present application.

[0031] FIG. 4 is a schematic diagram of the structure of a second support member in some embodiments of the present application.

[0032] FIG. 5 is an exploded view of a clamping assembly and a bipolar plate in some embodiments of the present application.

[0033] FIG. 6 is a side view of a sealing test device in some embodiments of the present application.

[0034] FIG. 7 is a schematic diagram of a structure for illustrating the connection relationship between the support assembly, the clamping assembly and the bipolar plate in some embodiments of the present application.

[0035] Description of Figure Numbers:

[0036] 10. bipolar plate; 20. support assembly; 202. first support member; 2022. groove; 2024. boss; 2026. mounting hole; 204. second support member; 2042. connection portion; 2044. extension portion; 2046. plug-in hole; 206. third support member; 208. fastener; 30. clamping assembly; 302. first clamping member; 304. second clamping member; 306. third clamping member; 308. fourth clamping member; 310. fifth clamping member; 40. fluid connector. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] Referring to FIG. 1 , an embodiment of the present application provides a sealing test device, comprising a support assembly 20, a clamping assembly 30 and a fluid connector 40. The support assembly 20 is used to support the clamping assembly 30 and the bipolar plate 10; the clamping assembly 30 is disposed between the support assembly 20 and the bipolar plate 10, and is used to clamp the end of the fluid channel on the bipolar plate 10; the fluid connector 40 is connected to the clamping assembly 30 and abuts against the bipolar plate 10, and is used to ventilate the fluid channel.

[0044] Among them, the bipolar plate 10 is one of the key components in the fuel cell. It is located between each fuel cell unit of the stack. Its main function is to guide hydrogen and air (oxygen) to the electrode reaction area of ​​the fuel cell, and at the same time, it plays the role of separating different units, conducting electricity, transferring heat, draining water and sealing. The fluid channels on the bipolar plate 10 are used to guide and distribute the gas and coolant involved in the electrochemical reaction; the bipolar plate 10 usually contains two main fluid channels: one type is used to transport reaction gases (such as hydrogen and oxygen / air), and the other type is used to conduct coolant to keep the temperature of the fuel cell within an appropriate working range.

[0045] Specifically, the clamping assembly 30 is respectively connected to the support assembly 20 and the bipolar plate 10, and the clamping assembly 30 forms a closed cavity space between the fluid connector 40 and the bipolar plate 10; the fluid connector 40 delivers the test fluid to the fluid channel of the bipolar plate 10 and maintains the fluid pressure in the test channel to test the airtightness of the fluid channel. Optionally, the test fluid is a test gas or a test liquid, and fluid channels with different functions are tested respectively.

[0046] In this embodiment, the position state of the fuel cell bipolar plate 10 is limited by the support assembly 20 and the clamping assembly 30, providing stable support, being able to move the bipolar plate 10 during testing, or avoiding deformation of the bipolar plate 10, thereby ensuring the accuracy of the test results; the fluid connector 40 abuts against the end of the fluid channel of the bipolar plate 10, providing a test fluid into the fluid channel, so as to observe and detect the sealing of the fluid channel; the clamping assembly 30 fits tightly with the end of the fluid channel of the bipolar plate 10, avoiding the fluid from flowing out of the end of the fluid channel during operation of the fluid connector 40, thereby reducing the pressure in the fluid channel and making it impossible to accurately test the sealing of the bipolar plate 10; on the other hand, the support assembly 20 and the clamping assembly can be adjusted in multiple dimensions according to the size of the bipolar plate 10, are easy to install, and are suitable for bipolar plates 10 of various sizes.

[0047] Please continue to refer to Figure 1 and Figure 2. The support assembly 20 includes two support units relatively arranged at both ends of the bipolar plate 10. The support unit includes a first support member 202, a second support member 204 and a third support member 206. The second support member 204 and the third support member 206 are adjustably connected to the first support member 202.

[0048] Specifically, the two support units at both ends of the bipolar plate 10 have the same structure, and the distance between the two support units can be adjusted according to the size of the bipolar plate 10; taking any one of the support units as an example, the distance between the first support member 202 and the other support unit is adjustable, the second support member 204 and the third support member 206 are sleeved on the first support member 202, the second support member 204 and the third support member 206 are arranged in parallel with the bipolar plate 10 and are relatively arranged on the two opposite sides of the bipolar plate 10, and the distance between the second support member 204 and the third support member 206 is adjustable to adapt to bipolar plates 10 of different sizes. The bipolar plate 10 is located between the second support member 204 and the third support member 206, a clamping assembly 30 is arranged between the second support member 204 and the bipolar plate 10, and a clamping assembly 30 is arranged between the third support member 206 and the bipolar plate 10, the distance between the second support member 204 and the third support member 206 is adjusted according to the size of the bipolar plate 10, and the bipolar plate 10 is supported and clamped by the clamping assembly 30. Optionally, the first support member 202 is made of a metal material, such as aluminum alloy or stainless steel, which has good corrosion resistance.

[0049] In this embodiment, the stability and rigidity of the structure are enhanced by two support units arranged opposite to each other, ensuring that the bipolar plate 10 will not be displaced during the airtightness test. By adjusting the spacing between the second support member 204 and the third support member 206 and the spacing between the two support units, it is possible to flexibly adapt to bipolar plates 10 of different sizes, effectively improving the scope of application of the test device. At the same time, the clamping assembly 30 is arranged between the second support member 204 and the bipolar plate 10 and between the third support member 206 and the bipolar plate 10, which can reliably carry and clamp the bipolar plate 10 to ensure its fixity during the test.

[0050] Referring to FIG. 2 and FIG. 3 , in some embodiments, the first support member 202 is disposed along a vertical direction of the bipolar plate 10 , and grooves 2022 and bosses 2024 are disposed adjacently and spaced apart on the outer sidewall of the first support member 202 .

[0051] The second support member 204 is provided with a plug hole 2046, and the boss 2024 is provided with a mounting hole 2026 relative to the plug hole 2046; the first support member 202 is extended along the vertical direction of the bipolar plate 10, and the outer wall of the first support member 202 is periodically provided with grooves 2022 and bosses 2024, and the grooves 2022 and bosses 2024 are uniformly arranged in sequence on the opposite outer walls of the first support member 202, and the second support member 204 and the third support member 206 are sleeved on the bosses 2024. Optionally, the cross section of the first support member 202 along the placement direction of the bipolar plate 10 can be circular or rectangular.

[0052] In this embodiment, the outer wall of the first support member 202 is periodically provided with evenly arranged grooves 2022 and bosses 2024, forming a plurality of stepped structures, which prevents the bipolar plate 10 from tilting, bending and other faults, improves the stability of the support assembly 20, and enhances the functionality of the support assembly 20; the stepped structure enables the second support member 204 and the third support member 206 and the first support member 202 to adapt to the bipolar plate 10 to achieve fastening support at a specific position. In addition, the groove 2022 can effectively reduce the weight of the first support member 202, improve the convenience of the device movement, and provide a reliable positioning and fixing fulcrum for the sleeve of the second support member 204 and the third support member 206, ensuring its stability and consistency during the test process.

[0053] Please refer to FIG. 2 in conjunction with FIG. 4 . In some embodiments, the second support member 204 includes a connecting portion 2042 and an extending portion 2044 . The connecting portion 2042 is connected to the first support member 202 . The extending portion 2044 is connected to the connecting portion 2042 and extends toward the center of the bipolar plate 10 .

[0054] Specifically, the connecting portion 2042 is arranged corresponding to the first supporting portion, the through hole shape of the connecting portion 2042 is the same as the cross-sectional shape and size of the first supporting member 202 along the placement direction of the bipolar plate 10, and the connecting portion 2042 is sleeved on the first supporting member 202. The extension portion 2044 and the connecting portion 2042 are located in the same plane, and the extension portion 2044 is composed of a plurality of extension arms, and the extension arms extend from the end of the bipolar plate 10 to the center of the bipolar plate 10, and the spacing between adjacent extension arms is set according to the size of the fluid channel of the bipolar plate 10. Exemplarily, there are two extension arms, which are arranged on both sides of the hydrogen channel, and the distance between the extension arms is the same as or greater than the size of the hydrogen channel. The extension arms are combined with the clamping assembly 30 to clamp the end of the hydrogen channel on the bipolar plate 10, and the hydrogen channel on the bipolar plate 10 is supplied with gas through the fluid connector 40 to test the air tightness of the hydrogen channel. Furthermore, the hydrogen channel and the oxygen channel on the bipolar plate 10 are arranged adjacent to each other, and the extension portion 2044 includes three extension arms, which are respectively arranged on both sides of the hydrogen channel and the oxygen channel, and clamp the hydrogen channel and the oxygen channel on the bipolar plate 10 at the same time. The fluid connector 40 supplies gas to the hydrogen channel and the oxygen channel at the same time to test the air tightness of the hydrogen channel and the oxygen channel.

[0055] Optionally, the second support member 204 is made of a metal material, such as aluminum alloy or stainless steel, and has good corrosion resistance; the second support member 204 and the third support member 206 have the same or different structures.

[0056] In this embodiment, the second support member 204 can be firmly fixed on the first support member 202 through the connecting portion 2042 and the extending portion 2044, so that the second support member 204 and the third support member 206 can firmly clamp the bipolar plate 10 and maintain the airtightness between the clamping assembly 30, the fluid connector 40 and the bipolar plate 10, thereby effectively improving the accuracy of the test results and the stability of the overall structure.

[0057] Please refer to Figures 5 and 6. In some embodiments, the clamping assembly 30 includes a first clamping member 302 and a second clamping member 304. The first surface of the first clamping member 302 abuts against the bipolar plate 10, the first surface of the second clamping member 304 abuts against the second surface of the first clamping member 302, and the second surface of the second clamping member 304 abuts against the extension portion 2044.

[0058] Specifically, a through hole is provided on the first clamping member 302 and the second clamping member 304, and the through hole size is the same as the size of the fluid connector 40, which is used to provide a channel for the test fluid output by the fluid connector 40; the first clamping member 302 is tightly fitted with the portion in contact with the bipolar plate 10 to ensure the sealing of the end of the fluid channel. The first surface of the second clamping member 304 is pressed onto the second surface of the first clamping member 302 to provide uniform downward pressure.

[0059] Furthermore, the testing device further includes a third clamping member 306, which is inserted into the mounting hole 2026 through the plug hole 2046 on the second support member 204, and the third clamping member 306 is used to define the positional relationship between the first support member 202 and the second support member 204. The third clamping member 306 is made of a metal material, such as an aluminum alloy or stainless steel, and its cross section generally has the same shape as the mounting hole 2026 of the first support member 202, such as a circle, a rectangle, or a diamond.

[0060] Optionally, the first clamping member 302 is made of non-metallic material, such as EPDM rubber, silicone rubber, fluororubber, nitrile rubber, etc., with a Shore hardness of 25-70, preferably a Shore hardness of 35-50; its thickness is 0.5-5mm, and it can be cut into different thicknesses as needed to match the fluid channel size of the bipolar plate 10. The cross-section of the first clamping member 302 can be slightly larger than a single fluid channel, and can also be cut into parts with the same width as the bipolar plate 10, or cover all fluid channels on the bipolar plate 10 at the same time, so as to simultaneously test the sealing of multiple fluid channels on the bipolar plate 10. The second clamping member 304 is made of metal material, such as aluminum alloy, etc., which can withstand a certain pressure; the second clamping member 304 generally has the same cross-sectional size as the first clamping member 302, and its thickness is 5-20mm.

[0061] In this embodiment, the bipolar plate 10 is clamped between the support assembly 20 by the first clamping member 302 and the second clamping member 304, and a closed space is formed between the fluid connector 40, the bipolar plate 10, and the first clamping member to allow the test fluid to enter the fluid channel of the bipolar plate 10 and ensure that the test fluid will not leak at the contact point between the fluid connector 40 and the bipolar plate 10, thereby improving the accuracy of the test results and the test efficiency, enabling the fluid connector 40 to be applicable to bipolar plates 10 with various test channel types, and expanding the scope of application of the test device.

[0062] Please continue to refer to Figures 5 and 6. In some embodiments, the second support member 204, the first clamping member 302 and the second clamping member 304 are provided with through holes relative to the fluid connector 40. The through holes are used to insert the fluid connector 40 so that the fluid connector 40 abuts against the bipolar plate 10.

[0063] Specifically, the through hole of the second support member 204 is located between the adjacent extension arms of the extension portion 2044, and the fluid connector 40 is sequentially arranged through the adjacent extension arms, the through hole of the second clamping member 304, and the through hole of the first clamping member 302, and finally abuts against the bipolar plate 10 to form a complete closed space. When the fluid connector 40 inputs the test fluid, the test fluid is always located between the fluid connector 40, the bipolar plate 10, and the first clamping member 302, and further enters the fluid port; when the fluid channel of the bipolar plate 10 is in a qualified state of airtightness, the air pressure in the fluid channel should be kept constant.

[0064] Further, the third support member 206 is arranged on a side away from the second support member 204, and a fourth clamping member 308 and a fifth clamping member 310 are arranged between the third support member 206 and the bipolar plate 10. The first side of the fourth clamping member 308 abuts against the bipolar plate 10, the first side of the fifth clamping member 310 abuts against the second side of the fourth clamping member 308, and the second side of the fifth clamping member 310 abuts against the third support member 206. The fourth clamping member 308 and the fifth clamping member 310 are not provided with through holes in the corresponding parts of the fluid connector 40, and the fourth clamping member 308 abuts against the bipolar plate 10 to support and clamp the bipolar plate 10.

[0065] The structure of another support unit opposite to the unit where the first support member 202 is located is similar to that of the first support unit, but the structure of the clamping assembly 30 therein is the same as the fourth clamping member 308 and the fifth clamping member 310, which seals the fluid port at the other end of the fluid channel of the bipolar plate 10 to prevent the test fluid from leaking from the fluid port at the other end and affecting the test results.

[0066] Optionally, the fourth clamping piece 308 is made of non-metallic material, such as EPDM rubber, silicone rubber, fluororubber, nitrile rubber, etc., with a Shore hardness of 25-70, preferably a Shore hardness of 35-50; its thickness is 0.5-5mm, and it can be cut into different thicknesses as needed to match the fluid channel size of the bipolar plate 10. The cross-section of the fourth clamping piece 308 can be slightly larger than a single fluid channel, and can also be cut into a part with the same width as the bipolar plate 10, or cover all the fluid channels on the bipolar plate 10 at the same time. The fifth clamping piece 310 is made of a metal material, such as aluminum alloy, which can withstand a certain pressure; the fifth clamping piece 310 has the same cross-sectional size as the fourth clamping piece 308, and its thickness is 5-20mm.

[0067] Please refer to FIG. 7 . In some embodiments, the testing device further includes a fastener 208 . The fastener 208 passes through the second support member 204 and the clamping assembly 30 to define the positions of the second support member 204 and the clamping assembly 30 .

[0068] For example, before the airtightness test of the bipolar plate 10 is performed, the distance between the two support units is adjusted according to the size of the bipolar plate 10, so that the bipolar plate 10 can be placed between the two support units. The second support member 204 and the third support member 206 are sleeved on the boss 2024 of the first support member 202, and the distance between the second support member 204 and the third support member 206 is adjusted according to the size of the bipolar plate 10. After the adjustment is completed, the two third clamping members 306 pass through the plug-in hole 2046 and are plugged into the mounting hole 2026 to fix the positional relationship between the second support member 204, the third support member 206 and the first support member 202. Place the first clamp 302 and the second clamp 304 between the second support 204 and the bipolar plate 10 in sequence, place the fourth clamp 308 and the fifth clamp 310 between the third support 206 and the bipolar plate 10 in sequence, take a number of fasteners 208, pre-install them on the extension 2044 of the second support 204, and tighten them with a torque of 90% of the final torque. Place the bipolar plate 10 between the first clamp 302 and the fourth clamp 308, adjust the distance between the two support units again, and align the fluid channel of the tested component with the first clamp 302; repeat the above steps to install the components of another support unit, and after all the installations are completed, tighten the fasteners 208 with the final fastener 208 torque. The fluid connector 40 is connected to the test pipeline, and the specific leakage value evaluation of the test component can be realized through the peripheral connection pipeline.

[0069] Optionally, the fully assembled test device can be placed in a pre-prepared water tank and after the test fluid is introduced, bubbles can be clearly observed at the leakage site, and the severity of the leakage can be evaluated based on the size and position of the bubbles; or the test fluid can be provided with colored gas, and when there is a leak in the fluid channel, gas of the color of the test fluid can be observed overflowing from the leakage site.

[0070] In this embodiment, the bipolar plate 10 is precisely positioned by the cooperation of the support assembly 20 and the clamping assembly 30, the planarity of the test assembly is ensured, the test device can be applied to bipolar plates 10 of various sizes, and the applicability of the test device is improved; the clamping assembly 30 provides a closed space for the fluid connector 40 and the bipolar plate 10, avoiding leakage of the test fluid, thereby improving the accuracy of the test results and the convenience of the test process.

[0071] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0072] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A sealing test device, characterized in that: The device comprises: A support assembly, used to support the clamping assembly and the bipolar plate; A clamping assembly, disposed between the support assembly and the bipolar plate, for clamping ends of the fluid channels on the bipolar plate; and A fluid connector is connected to the clamping assembly and abuts against the bipolar plate, and is used for ventilating the fluid channel.

2. The device according to claim 1, characterized in that The support assembly includes two support units arranged opposite to each other at two ends of the bipolar plate, and the support units include: A first support member, a second support member and a third support member, wherein the second support member and the third support member are adjustably connected to the first support member.

3. The device according to claim 2, characterized in that The first support member is arranged along the vertical direction of the bipolar plate, and grooves and bosses are arranged adjacently and spaced apart on the outer side wall of the first support member.

4. The device according to claim 3, characterized in that The second support member and the third support member are arranged in parallel with the bipolar plate and are arranged opposite to each other on two opposite sides of the bipolar plate.

5. The device according to claim 2, characterized in that The second support member comprises: A connecting portion connected to the first supporting member; The extension portion is connected to the connection portion and extends toward the center of the bipolar plate.

6. The device according to claim 5, characterized in that The clamping assembly comprises: a first clamping member, wherein a first surface of the first clamping member abuts against the bipolar plate; A second clamping member, wherein a first surface of the second clamping member abuts against a second surface of the first clamping member, and a second surface of the second clamping member abuts against the extending portion.

7. The device according to claim 6, characterized in that The second supporting member, the first clamping member and the second clamping member are provided with through holes relative to the fluid connector; The through hole is used for inserting the fluid connector so that the fluid connector abuts against the bipolar plate.

8. The device according to claim 3, characterized in that The second supporting member is provided with an inserting hole, and the boss is provided with a mounting hole relative to the inserting hole.

9. The device according to claim 8, characterized in that The clamping assembly also includes a third clamping member, which passes through the insertion hole and is inserted into the mounting hole; the third clamping member is used to limit the positions of the first support member and the second support member.

10. The device according to claim 2, characterized in that Also includes: A fastener runs through the second support member and the clamping assembly and is used to limit the positions of the second support member and the clamping assembly.

Images