Leakage testing device

Abstract

The application relates to a sealing test device, comprising a supporting assembly, a clamping assembly and a fluid joint. The supporting assembly is used for supporting the clamping assembly and a bipolar plate; the clamping assembly is arranged between the supporting assembly and the bipolar plate and is used for clamping the end of a fluid channel on the bipolar plate; and the fluid joint is connected with the clamping assembly and abuts on the bipolar plate and is used for ventilating the fluid channel. Through cooperation of the supporting assembly and the clamping assembly, accurate positioning of the bipolar plate is realized, the planarity of a test assembly is guaranteed, the test device can be applied to bipolar plates of various sizes, and the applicability of the test device is improved; the clamping assembly provides a sealed space for the fluid joint and the bipolar plate, leakage of a test fluid is avoided, and the accuracy of a test result and the convenience of a test process are improved.

Description

Technical Field

[0001] This application relates to the field of fuel cell technology, and in particular to a sealing test apparatus. Background Technology

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

[0003] Currently, most existing airtightness testing methods rely on customized testing equipment, using complex positioning devices and sealing strips to detect gas. Examples include using airtightness testing devices that form a sealed cavity or combining a positioning cavity with a sealing strip.

[0004] However, the aforementioned detection methods or related devices require customized molds and sealing strips, increasing costs and making them difficult to adapt to bipolar plates of different sizes or shapes. Furthermore, the detection results typically only show the overall leakage situation, failing to quickly and accurately pinpoint the specific leak location. This results in time-consuming and inefficient troubleshooting, making it difficult to meet the rapid detection needs of fuel cells during development and maintenance. Summary of the Invention

[0005] Based on this, this application provides a sealing test device to solve the problems of not being able to test the sealing performance of bipolar plates of fuel cells with different shapes and the high testing cost.

[0006] In a first aspect, this application provides a sealing performance testing device, the device comprising:

[0007] Support assembly for supporting the clamping assembly and bipolar plate;

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

[0009] A fluid connector, which connects to the clamping assembly and abuts against the bipolar plate, is used to supply air to the fluid channel.

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

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

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

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

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

[0015] The connecting part is connected to the first support member;

[0016] The extension section connects to the connecting section and extends toward the center of the bipolar plate.

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

[0018] The first clamping member has its first surface in contact with the bipolar plate.

[0019] The second clamping member has a first surface that abuts against the second surface of the first clamping member, and the second surface of the second clamping member abuts against the extension.

[0020] In one embodiment, the second support, 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 to insert the fluid connector, allowing the fluid connector to come into contact with the bipolar plate.

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

[0023] In one embodiment, the clamping assembly further includes a third clamping member that is inserted into the mounting hole through a plug-in hole; the third clamping member is used to define the positions of the first support member and the second support member.

[0024] In one embodiment, it further includes:

[0025] Fasteners, extending through the second support and clamping assembly, are used to define the position of the second support and clamping assembly.

[0026] The aforementioned sealing test device defines the position of the fuel cell bipolar plate through the support and clamping components, providing stable support and enabling movement of the bipolar plate during testing, or preventing deformation of the bipolar plate, thereby ensuring the accuracy of the test results. The fluid connector abuts against the end of the fluid channel of the bipolar plate, supplying test fluid into the fluid channel to observe and test the sealing performance of the fluid channel. The clamping components fit tightly against the end of the fluid channel of the bipolar plate, preventing fluid from flowing out of the end of the fluid channel during operation, which would reduce the pressure inside the fluid channel and make it impossible to accurately test the sealing performance of the bipolar plate. On the other hand, the support and clamping components 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. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the sealing test device in some embodiments of this application.

[0029] Figure 2 This is a structural schematic diagram illustrating the connection relationship between the first support member, the second support member, and the third support member in some embodiments of this application.

[0030] Figure 3 This is a schematic diagram of the structure of the first support member in some embodiments of this application.

[0031] Figure 4 This is a schematic diagram of the structure of the second support member in some embodiments of this application.

[0032] Figure 5 This is an exploded view of the clamping assembly and bipolar plate in some embodiments of this application.

[0033] Figure 6 Side view of a sealing test apparatus in some embodiments of this application

[0034] Figure 7 This is a structural schematic diagram illustrating the connection relationship between the support assembly, the clamping assembly, and the bipolar plate in some embodiments of this application.

[0035] Explanation of icon numbers:

[0036] 10. Bipolar plate; 20. Support assembly; 202. First support member; 2022. Groove; 2024. Boss; 2026. Mounting hole; 204. Second support member; 2042. Connecting part; 2044. Extension part; 2046. Insertion 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 Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] Please see Figure 1 One embodiment of this application provides a sealing performance testing device, including a support assembly 20, a clamping assembly 30, and a fluid connector 40. The support assembly 20 supports 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 for venting the fluid channel.

[0044] The bipolar plate 10 is one of the key components in a fuel cell, located between each fuel cell unit in the stack. Its main function is to guide hydrogen and air (oxygen) to the electrode reaction zone of the fuel cell, while also serving to separate different units, conduct electricity, transfer heat, drain water, and seal the fuel cell. The fluid channels on the bipolar plate 10 are used to guide and distribute the gases and coolant involved in the electrochemical reaction. The bipolar plate 10 typically contains two main types of fluid channels: one for transporting reactant gases (such as hydrogen and oxygen / air), and the other for conducting coolant to maintain the fuel cell temperature within the appropriate operating range.

[0045] Specifically, the clamping assembly 30 is connected to both the support assembly 20 and the bipolar plate 10, forming a sealed cavity between the fluid connector 40 and the bipolar plate 10. The fluid connector 40 delivers 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 can be a test gas or a test liquid, respectively, to test fluid channels with different functions.

[0046] In this embodiment, the position of the fuel cell bipolar plate 10 is defined by the support component 20 and the clamping component 30, providing stable support. This allows the bipolar plate 10 to be moved during testing or prevents 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 test fluid into the fluid channel to observe and test the sealing performance of the fluid channel. The clamping component 30 fits tightly against the end of the fluid channel of the bipolar plate 10, preventing fluid from flowing out of the end of the fluid channel during operation, which would reduce the pressure in the fluid channel and make it impossible to accurately test the sealing performance of the bipolar plate 10. On the other hand, the support component 20 and the clamping component 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 reading. Figure 1 and combined Figure 2 The support assembly 20 includes two support units disposed opposite to each other at both ends of the bipolar plate 10. Each 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 adjustablely connected to the first support member 202.

[0048] Specifically, the two support units located at both ends of the bipolar plate 10 have identical structures, 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 parallel to the bipolar plate 10 and opposite to each other on two sides of the bipolar plate 10. The distance between the second support member 204 and the third support member 206 is adjustable to accommodate 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 provided between the second support member 204 and the bipolar plate 10, and a clamping assembly 30 is provided 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 metal, 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 opposing support units, ensuring that the bipolar plate 10 will not shift during the airtightness test. By adjusting the distance between the second support member 204 and the third support member 206, as well as the distance between the two support units, different sizes of bipolar plates 10 can be flexibly accommodated, effectively improving the applicability of the testing device. Simultaneously, the clamping assembly 30 is positioned between the second support member 204 and the bipolar plate 10, and between the third support member 206 and the bipolar plate 10, reliably supporting and clamping the bipolar plate 10, ensuring its fixation during the test.

[0050] Please see Figure 2 and combined Figure 3 In some embodiments, the first support member 202 is arranged vertically along the bipolar plate 10, and the outer side wall of the first support member 202 is provided with grooves 2022 and bosses 2024 at intervals.

[0051] The second support member 204 is provided with a insertion hole 2046, and the boss 2024 is provided with a mounting hole 2026 relative to the insertion hole 2046. The first support member 202 extends vertically along the bipolar plate 10, and the outer side wall of the first support member 202 is periodically provided with grooves 2022 and bosses 2024. The grooves 2022 and bosses 2024 are arranged evenly on opposite outer side walls of the first support member 202. 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 uniformly arranged grooves 2022 and bosses 2024, forming multiple stepped structures. This avoids tilting, bending, and other malfunctions of the bipolar plate 10, improves the stability of the support assembly 20, and enhances its functionality. The stepped structure allows the second support member 204 and the third support member 206 to be securely supported to the first support member 202 at specific positions of the bipolar plate 10. Furthermore, the grooves 2022 effectively reduce the weight of the first support member 202, improving the ease of movement of the device. At the same time, they provide reliable positioning and fixing points for the installation of the second support member 204 and the third support member 206, ensuring their stability and consistency during the testing process.

[0053] Please see Figure 2 and combined Figure 4 In some embodiments, the second support member 204 includes a connecting portion 2042 and an extension portion 2044. The connecting portion 2042 is connected to the first support member 202, and the extension portion 2044 is connected to the connecting portion 2042 and extends toward the center of the bipolar plate 10.

[0054] Specifically, the connecting part 2042 is correspondingly provided with the first support part. The shape and size of the through hole of the connecting part 2042 are the same as the cross-sectional shape of the first support member 202 along the placement direction of the bipolar plate 10. The connecting part 2042 is sleeved on the first support member 202. The extension part 2044 and the connecting part 2042 are located on the same plane. The extension part 2044 is composed of multiple extension arms. The extension arms extend from the end of the bipolar plate 10 to the center of the bipolar plate 10. The spacing between adjacent extension arms is set according to the size of the fluid channel of the bipolar plate 10. For example, there are two extension arms, which are respectively provided on both sides of the hydrogen channel. The distance between the extension arms is the same as or greater than the size of the hydrogen channel. The extension arms, together with the clamping assembly 30, clamp the end of the hydrogen channel on the bipolar plate 10. Gas is supplied to the hydrogen channel on the bipolar plate 10 through the fluid connector 40 to test the airtightness of the hydrogen channel. Furthermore, the hydrogen channel and the oxygen channel on the bipolar plate 10 are arranged adjacent to each other. The extension 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. The fluid connector 40 supplies gas to the hydrogen channel and the oxygen channel at the same time to test the airtightness of the hydrogen channel and the oxygen channel.

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

[0056] In this embodiment, the connecting part 2042 and the extension part 2044 enable the second support member 204 to be firmly fixed on the first support member 202, and enable the second support member 204 and the third support member 206 to 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 mechanism.

[0057] Please refer to Figure 5 and Figure 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 2044.

[0058] Specifically, the first clamping member 302 and the second clamping member 304 have through holes of the same size as the fluid connector 40, which provide a channel for the test fluid output from the fluid connector 40. The part of the first clamping member 302 that contacts the bipolar plate 10 fits tightly to ensure the sealing of the fluid channel end. The first surface of the second clamping member 304 is pressed against the second surface of the first clamping member 302 to provide uniform downward pressure.

[0059] Furthermore, the testing device also includes a third clamping member 306, which passes through the insertion hole 2046 on the second support member 204 and is inserted into the mounting hole 2026. 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 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 circular, rectangular, or rhomboid.

[0060] Optionally, the first clamping member 302 is made of a non-metallic material, such as EPDM rubber, silicone, fluororubber, nitrile rubber, etc., with a Shore hardness of 25-70, preferably 35-50; its thickness is 0.5-5mm, and it can be cut into different thicknesses as needed to match the fluid channel dimensions of the bipolar plate 10. The cross-section of the first clamping member 302 can be slightly larger than a single fluid channel, or it can be cut into a part with the same width as the bipolar plate 10, or it can cover all the fluid channels on the bipolar plate 10 at the same time, so as to simultaneously perform a sealing test on multiple fluid channels on the bipolar plate 10. The second clamping member 304 is made of a metallic material, such as aluminum alloy, and can withstand a certain pressure; the second clamping member 304 generally has the same cross-sectional dimensions 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 components 20 by the first clamping member 302 and the second clamping member 304, forming a sealed space between the fluid connector 40, the bipolar plate 10, and the first clamping member, so that the test fluid can enter the fluid channel of the bipolar plate 10, and ensuring 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 and efficiency of the test results and making the fluid connector 40 applicable to bipolar plates 10 with various test channel types, thus expanding the applicability of the test device.

[0062] Please continue reading. Figure 5 and Figure 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 being 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 adjacent extension arms of the extension 2044. The fluid connector 40 is sequentially inserted through the through holes of the adjacent extension arms, the second clamping member 304, and the first clamping member 302, and finally abuts against the bipolar plate 10 to form a complete sealed space. When the test fluid is input into the fluid connector 40, 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; under the condition that the fluid channel of the bipolar plate 10 is airtight, the air pressure in the fluid channel should remain constant.

[0064] Furthermore, the third support member 206 is disposed on the side of the bipolar plate 10 opposite to the second support member 204. A fourth clamping member 308 and a fifth clamping member 310 are disposed between the third support member 206 and the bipolar plate 10. The first surface of the fourth clamping member 308 abuts against the bipolar plate 10, and the first surface of the fifth clamping member 310 abuts against the second surface of the fourth clamping member 308. The second surface of the fifth clamping member 310 abuts against the third support member 206. The portions of the fourth clamping member 308 and the fifth clamping member 310 corresponding to the fluid connector 40 do not have through holes. The fourth clamping member 308 abuts against the bipolar plate 10 to support and clamp the bipolar plate 10.

[0065] Another support unit opposite to the unit where the first support member 202 is located has a similar structure to the first support unit, but the clamping component 30 in it has the same structure 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 out from the fluid port at the other end and affecting the test results.

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

[0067] Please see Figure 7 In some embodiments, the testing apparatus further includes a fastener 208 that extends through the second support 204 and the clamping assembly 30 to define the positions of the second support 204 and the clamping assembly 30.

[0068] For example, before performing a sealing test on the bipolar plate 10, the spacing 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. The spacing 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, two third clamping members 306 are inserted into the mounting hole 2026 through the insertion hole 2046 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 clamping member 302 and the second clamping member 304 sequentially between the second support member 204 and the bipolar plate 10. Place the fourth clamping member 308 and the fifth clamping member 310 sequentially between the third support member 206 and the bipolar plate 10. Take several fasteners 208 and pre-install them on the extension 2044 of the second support member 204, tightening them to 90% of the final torque. Place the bipolar plate 10 between the first clamping member 302 and the fourth clamping member 308, and readjust the distance between the two support units to align the fluid channel of the tested component with the first clamping member 302. Repeat the above steps to install the components of the other support unit. After all components are installed, tighten the fasteners 208 to the final torque. Connect the fluid connector 40 to the test pipeline. Through the external connection pipeline, the specific leakage value of the tested component can be evaluated.

[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 leak site. The severity of the leak can be assessed based on the size and location of the bubbles. Alternatively, the test fluid can be set with a colored gas. When there is a leak in the fluid channel, the gas of the test fluid color can be observed to overflow from the leak site.

[0070] In this embodiment, the bipolar plate 10 is precisely positioned by the cooperation of the support component 20 and the clamping component 30, ensuring the planarity of the test assembly and enabling the test device to be applicable to bipolar plates 10 of various sizes, thus improving the applicability of the test device. The clamping component 30 provides a sealed space between the fluid connector 40 and the bipolar plate 10, preventing leakage of the test fluid and improving the accuracy of the test results and the convenience of the test process.

[0071] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A leak test device, characterized by, The device comprises: a support assembly for supporting a clamping assembly and a bipolar plate; a clamping assembly arranged between the support assembly and the bipolar plate for clamping an end of a fluid channel on the bipolar plate; and a fluid connector connected to the clamping assembly and abutting on the bipolar plate for venting the fluid channel; the support assembly comprises two support units arranged opposite to both ends of the bipolar plate, and the support units comprise: a first support, a second support and a third support, the second support and the third support being adjustably connected to the first support, the first support being arranged in a vertical direction of the bipolar plate, and a recess and a boss being arranged adjacent and spaced apart on an outer side wall of the first support.

2. The apparatus of claim 1, wherein, The second support and the third support are arranged parallel to the bipolar plate and opposite to two sides of the bipolar plate facing away from each other.

3. The apparatus of claim 2, wherein, The third support and the bipolar plate are provided with a fourth clamping member and a fifth clamping member, a first surface of the fourth clamping member abutting the bipolar plate, a first surface of the fifth clamping member abutting a second surface of the fourth clamping member, and a second surface of the fifth clamping member abutting the third support.

4. The apparatus of claim 3, wherein, The fourth clamping member is made of non-metallic material, and the Shore hardness of the fourth clamping member is 25-70.

5. The apparatus of claim 1, wherein, The second support comprises: a connecting portion connected to the first support; an extension portion connected to the connecting portion and extending towards the center of the bipolar plate.

6. The apparatus of claim 5, wherein, The clamping assembly comprises: a first clamping member, a first surface of the first clamping member abutting the bipolar plate; a second clamping member, a first surface of the second clamping member abutting a second surface of the first clamping member, and a second surface of the second clamping member abutting the extension portion.

7. The apparatus of claim 6, wherein, The second support, the first clamping member and the second clamping member are provided with through holes relative to the fluid connector; The through holes are used for inserting the fluid connector so that the fluid connector abuts the bipolar plate.

8. The apparatus of claim 1, wherein, The second support is provided with an insertion hole, and the boss is provided with a mounting hole relative to the insertion hole.

9. The apparatus of claim 8, wherein, The clamping assembly further comprises a third clamping member inserted into the mounting hole through the insertion hole; the third clamping member is used to define the positions of the first support and the second support.

10. The apparatus of claim 1, wherein, Further comprising: a fastener penetrating through the second support and the clamping assembly for defining the positions of the second support and the clamping assembly.

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