Sealing test device for bipolar plate of fuel cell

Abstract

The utility model relates to the technical field of fuel cell detection, in particular to a fuel cell bipolar plate sealing test device which comprises a base, a rotating motor, a telescopic motor, a buffer assembly, a sliding rail, a rotating disc, a bipolar plate, an air injection device and a positioning piece. The rotating motor and the telescopic motor are arranged on the two opposite sides of the base correspondingly, the output end of the telescopic motor is connected with the buffering assembly, the other side of the buffering assembly is rotationally connected with a rotating disc, the buffering assembly is slidably installed on the sliding rail, and the bipolar plate is clamped between the rotating disc and the rotating motor. The bipolar plate is of a rectangular structure, and test holes are formed in the four side faces of the bipolar plate. And the positioning piece is used for enabling the air injection pipe of the air injection device in a fixed direction to be aligned with the test hole formed in the current surface and enabling the air injection pipe to be accurately inserted into the test hole every time the rotating motor rotates the bipolar plate by 90 degrees in the test process, so that the sealing detection of the test hole in each side surface of the bipolar plate is realized.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell testing technology, and in particular to a fuel cell bipolar plate sealing test device. Background Technology

[0002] Bipolar plates are a crucial component of fuel cells. Their primary function is to create gas flow channels within the fuel cell and to provide electrical conductivity, support, and sealing. Bipolar plates typically have multiple test holes, and the sealing performance of these holes directly affects the fuel cell's performance and lifespan. Therefore, during the manufacturing process, the test holes of the bipolar plates must be tested for sealing to ensure they meet usage requirements.

[0003] Traditional methods of sealing testing rely primarily on manual operation, typically requiring operators to manually align each test hole, insert the testing device sequentially, and perform the sealing test. This method is not only inefficient but also susceptible to human error, leading to unstable test results. Furthermore, manual testing demands a high level of operator skill, and prolonged repetitive work can easily cause fatigue, further increasing the likelihood of errors. Utility Model Content

[0004] The purpose of this invention is to provide a fuel cell bipolar plate sealing test device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fuel cell bipolar plate sealing test device, comprising a base, a rotating motor, a telescopic motor, a buffer assembly, a sliding rail, a rotating disk, a bipolar plate, an injection device, and a positioning component; the rotating motor and the telescopic motor are respectively disposed on opposite sides of the base, the output end of the telescopic motor is connected to the buffer assembly, the other side of the buffer assembly is rotatably connected to the rotating disk, the buffer assembly is slidably mounted on the sliding rail, the bipolar plate is clamped between the rotating disk and the rotating motor, the bipolar plate has a rectangular structure and each of its four sides is provided with a test hole; the positioning component is used to, during the test, align the injection pipe of the injection device in a fixed direction with the test hole on the current side after the rotating motor rotates the bipolar plate by 90°, and accurately insert the injection pipe into the test hole, thereby realizing the sealing test of the test holes on each side of the bipolar plate.

[0006] Preferably, the positioning element includes a slide rail fixedly disposed on the base; a sliding block slidably disposed on the slide rail, the sliding block having a V-shaped sliding through hole; and a C-shaped sliding through hole on the slide rail; the sliding block is driven to slide along the slide rail by a lifting device, which can simultaneously drive the support rod passing through the C-shaped sliding through hole and the V-shaped sliding through hole to move.

[0007] Preferably, the inner surface of the slide is an inclined surface; one side of the sliding block is an inclined surface and abuts against the inner surface of the slide; when the sliding block moves up and down, the two inclined surfaces slide against each other, causing the sliding block to move laterally.

[0008] Preferably, the support rod includes: a limiting plate fixedly mounted on the support rod, a spring block disposed at one end of the support rod, a pad sleeved on the support rod, and a compression spring disposed between the pad and the spring block; the limiting plate and the pad clamp a sliding block and a slide rail, so that while the support rod and the sliding block move laterally in coordination, the inclined surface of the sliding block and the inclined surface inside the slide rail always remain in contact.

[0009] Preferably, one end of the support rod has a rectangular structure, which prevents the support rod from rotating as it moves with the sliding block.

[0010] Preferably, the base is also provided with a horizontal placement platform, which is used to ensure that the bipolar plate is held horizontally by the rotating motor and the telescopic motor, and can be replaced or adjusted according to different specifications of bipolar plates.

[0011] Preferably, the jetting device further includes an air supply valve and a pressure detection component. The jetting pipe is connected to the air supply valve, and the pressure detection component is used to detect the sealing performance of the test hole and output the test result after the test is completed.

[0012] Preferably, the pressure detection component includes a pressure sensor and a data processing module. The pressure sensor is used to detect changes in air pressure within the test hole, and the data processing module is used to analyze the detection data to determine whether the sealing performance is qualified.

[0013] Preferably, the rotating shaft of the rotating motor is equipped with an encoder, which is used to detect the rotation angle of the bipolar plate and feed the angle data back to the control system to ensure that the bipolar plate reaches the set angle each time it rotates.

[0014] The beneficial effects of this utility model are:

[0015] This device achieves automatic inspection of all four sides of a bipolar plate through automatic clamping, rotation, precise positioning, and sealing testing. Compared to the traditional method of aligning and inspecting one side at a time, this device can quickly complete the alignment and inspection of multiple test holes, avoiding alignment errors and repeated adjustments that may occur during manual operation, thus improving the accuracy of the inspection. Simultaneously, the device's automatic rotation and lifting adjustment functions allow the jetting device to accurately align with the test holes, reducing inspection time and significantly improving overall inspection efficiency.

[0016] This device reduces manual intervention through an automated testing process. Operators only need to perform initial settings to complete the sealing test of the entire bipolar plate, thereby reducing reliance on manpower and labor intensity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the fuel cell bipolar plate sealing test device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the positioning component structure of the fuel cell bipolar plate sealing test device according to an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the sliding groove structure of the fuel cell bipolar plate sealing test device according to an embodiment of this utility model;

[0021] Figure 4 This invention relates to a fuel cell bipolar plate sealing test device. Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0022] The components are marked as follows: base (100), rotating motor (101), telescopic motor (102), buffer assembly (103), sliding rail (104), rotating disk (105), bipolar plate (106), test hole (107), jet device (108), positioning component (109), jet pipe (110), horizontal placement platform (111), slide (109a), sliding block (109b), C-type sliding through hole (109c), V-type sliding through hole (109d), lifting device (109e), support rod (109f), limit plate (109f-1), spring block (109f-2), pad (109f-3), compression spring (109f-4). Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 4 As shown in the specific embodiment of this utility model, a fuel cell bipolar plate sealing test device is provided, comprising:

[0026] Base 100 and horizontal placement platform 111: A horizontal placement platform 111 is provided on the base 100 to place the bipolar plate 106 in a horizontal state, thereby ensuring that the bipolar plate 106 can be stably clamped by the rotating motor 101 and the telescopic motor 102.

[0027] Drive mechanism: Rotary motor 101 and telescopic motor 102 are respectively installed on opposite sides of the base 100;

[0028] Buffer and rotation mechanism: The output end of the telescopic motor 102 is connected to the buffer assembly 103, which is slidably mounted on the sliding rail 104, and the other side of the buffer assembly 103 is rotatably connected to the rotating disk 105.

[0029] Test object: Bipolar plate 106 is clamped between rotating disk 105 and rotating motor 101. Bipolar plate 106 has a rectangular structure and test holes 107 are provided on each of the four sides. The test holes 107 on opposite sides are in the same relative position.

[0030] Testing apparatus: A jetting device 108 with a fixed-direction jetting pipe 110 for introducing gas into the test port 107;

[0031] Positioning mechanism: During the test, the jet nozzle 110 of the fixed-direction jet device 108 is precisely aligned with the test hole 107 in front and accurately inserted into the test hole 107 after the bipolar plate 106 is rotated 90° by the rotating motor 101. Specifically, the telescopic motor 102 drives the buffer assembly 103 to move along the sliding rail 104, pushing the bipolar plate 106 closer to the rotating motor 101 and clamping it in place. After the horizontal placement platform 111 is removed, the rotating motor 101 drives the rotating disk 105 to rotate, causing the bipolar plate 106 to rotate 90° around its central axis, thereby sequentially performing a sealing test on the test holes 107 on each side of the bipolar plate 106.

[0032] Positioning mechanisms include:

[0033] Guide slide 109a is fixedly mounted on base 100;

[0034] A sliding block 109b is slidably installed on the guide slide 109a, and the sliding block 109b is provided with a V-shaped sliding through hole 109d;

[0035] A C-shaped sliding through hole 109c is provided on the guide slide 109a;

[0036] When the sliding block 109b slides along the guide slide 109a to both ends of the C-shaped sliding through hole 109c, the support rod 109f, carrying the jet pipe 110 of the jet device 108, enters the guide grooves on both sides of the C-shaped sliding through hole 109c via the inclined surface of the V-shaped sliding through hole 109d, thereby causing the movement trajectory of the support rod 109f to deviate towards the direction of the openings at both ends of the C-shaped sliding through hole 109c. This positioning action ensures that after each 90° rotation of the bipolar plate 106, the jet pipe 110 of the jet device 108, with its fixed direction, can accurately align with the test hole 107 on the current surface and be accurately inserted to complete the sealing test.

[0037] In one embodiment of this utility model, the inner surface of the guide slide 109a is set as an inclined surface, and one side of the sliding block 109b is also set as an inclined surface, with the two abutting against each other. When the sliding block 109b moves up and down through the lifting device 109e, the contact action between the inclined surfaces causes the sliding block 109b to make a slight lateral movement. After the bipolar plate 106 rotates 90°, the horizontal position of the test hole 107 will also shift. The lateral movement of the sliding block 109b can ensure that the jet pipe 110 of the jet device 108 is accurately aligned with the test hole 107 set on the current surface; it can realize the test hole 107 on all four surfaces to be tested one by one, thereby completing the entire sealing test process.

[0038] The support rod 109f includes: a limiting plate 109f-1 fixedly mounted on the support rod 109f; a spring block 109f-2 disposed at one end of the support rod 109f; a pad 109f-3 sleeved on the support rod 109f; and a compression spring 109f-4 disposed between the pad 109f-3 and the spring block 109f-2. In this embodiment, the limiting plate 109f-1 and the pad 109f-3 clamp the sliding block 109b and the guide slide 109a, ensuring that the two inclined surfaces remain in close contact when the sliding block 109b and the guide slide 109a move laterally in tandem. To prevent the support rod 109f from rotating during lateral movement, one end of the support rod 109f adopts a rectangular structure, thereby ensuring its stable posture during movement and further ensuring the precise positioning of the jet pipe 110 of the jet device 108.

[0039] The jet device 108 also includes an air supply valve and a pressure detection component. The jet pipe 110 is connected to the air supply valve. The pressure detection component is used to detect the sealing performance of the test hole 107 and outputs the test results after the test is completed.

[0040] The pressure detection component includes a pressure sensor and a data processing module. The pressure sensor is used to detect changes in air pressure within the test hole 107, and the data processing module is used to analyze the detection data to determine whether the sealing performance is up to standard.

[0041] An encoder is installed on the shaft of the rotating motor 101. The encoder is used to detect the rotation angle of the bipolar plate 106 and feed the angle data back to the control system to ensure that the bipolar plate 106 reaches the set angle every time it rotates.

[0042] Working principle: The bipolar plate 106 is first placed on the detachable horizontal placement platform 111 set on the base 100 to ensure that the bipolar plate 106 always remains horizontal, thereby making the subsequent clamping and rotation process stable and reliable.

[0043] The telescopic motor 102 drives the buffer assembly 103 connected to its output end to move along the sliding track 104, so that the bipolar plate 106 is clamped and fixed by the rotating motor 101 and the telescopic motor 102 at the same time. Then the horizontal placement platform 111 is removed. The bipolar plate 106 is a rectangular structure with a test hole 107 on each of its four sides. The test holes 107 on opposite sides are in the same position, which provides a structural guarantee for subsequent testing.

[0044] The rotating motor 101 is started, driving the rotating disk 105 to rotate, causing the bipolar plate 106 to rotate 90° around the central axis. After each rotation, the sliding block 109b moves up or down in the slide rail 109a via the lifting device 109e, so that the jet pipe 110 of the jet device 108 is aligned with the current test hole 107 in the vertical direction, thereby creating conditions for sealing test.

[0045] After the bipolar plate 106 rotates 90°, the position of the test hole 107 changes in the vertical direction, and a slight offset also occurs in the horizontal direction. To solve this problem, the positioning component 109 is designed with a guide slide 109a, the inner surface of which is provided with an inclined surface; one side of the sliding block 109b is also set as an inclined surface, which abuts against the inclined surface inside the guide slide 109a. When the sliding block 109b moves up or down through the lifting device 109e, the contact action between the inclined surfaces causes the sliding block 109b to produce a slight lateral movement, thereby compensating for the offset of the horizontal position of the test hole 107 and ensuring that the jet pipe 110 of the jet device 108 can always be accurately aligned with the test hole 107 currently provided.

[0046] The positioning component 109 also includes a sliding block 109b with a V-shaped sliding through hole 109d and a C-shaped sliding through hole 109c. When the sliding block 109b slides along the guide slide 109a to both ends of the C-shaped sliding through hole 109c, the support rod 109f enters the guide grooves on both sides of the C-shaped sliding through hole 109c with the help of the inclined surface of the V-shaped sliding through hole 109d, causing the movement trajectory of the support rod 109f to deviate towards the opening direction at both ends of the C-shaped sliding through hole 109c. This achieves precise docking with the current test hole 107.

[0047] With the assistance of the positioning element 109, the jet device 108 accurately inserts the jet pipe 110 into the test hole 107 and then introduces gas into the test hole 107 to perform a sealing test. After the test is completed, the device can control rotation, lifting, and other actions to sequentially test the test holes 107 on all four sides of the bipolar plate 106 until the sealing test of the entire bipolar plate 106 is completed.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0049] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fuel cell bipolar plate sealing test device, characterized in that, It includes a base (100), a rotating motor (101), a telescopic motor (102), a buffer assembly (103), a sliding rail (104), a rotating disk (105), a bipolar plate (106), an air jet device (108), and a positioning component (109). The rotary motor (101) and the telescopic motor (102) are respectively disposed on opposite sides of the base (100). The output end of the telescopic motor (102) is connected to the buffer assembly (103). The other side of the buffer assembly (103) is rotatably connected to the rotating disk (105). The buffer assembly (103) is slidably mounted on the sliding rail (104). The bipolar plate (106) is clamped between the rotating disk (105) and the rotary motor (101). The bipolar plate (106) has a rectangular structure and each of its four sides is provided with a test hole (107). The positioning component (109) is used to align the jet pipe (110) of the fixed-direction jet device (108) with the test hole (107) on the current side whenever the rotating motor (101) rotates the bipolar plate (106) by 90° during the test, and to accurately insert the jet pipe (110) into the test hole (107) to realize the sealing test of the test holes (107) on each side of the bipolar plate (106).

2. The fuel cell bipolar plate sealing test device according to claim 1, characterized in that, The positioning component (109) includes a slide rail (109a) fixedly disposed on the base (100); a sliding block (109b) slidably disposed on the slide rail (109a), the sliding block (109b) having a V-shaped sliding through hole (109d); and a C-shaped sliding through hole (109c) opened on the slide rail (109a). The sliding block (109b) is driven to slide along the slide rail (109a) by the lifting device (109e), which can simultaneously drive the support rod (109f) that passes through the C-shaped sliding through hole (109c) and the V-shaped sliding through hole (109d) to move.

3. The fuel cell bipolar plate sealing test device according to claim 2, characterized in that, The inner surface of the slide (109a) is set as an inclined surface; One side of the sliding block (109b) is set as an inclined surface and abuts against the inner surface of the slide (109a); When the sliding block (109b) moves up and down, the two inclined surfaces slide against each other, causing the sliding block (109b) to move laterally.

4. The fuel cell bipolar plate sealing test device according to claim 2, characterized in that, The support rod (109f) includes: a limiting plate (109f-1) fixedly mounted on the support rod (109f), a spring block (109f-2) mounted at one end of the support rod (109f), a pad (109f-3) sleeved on the support rod (109f), and a compression spring (109f-4) mounted between the pad (109f-3) and the spring block (109f-2). The limiting plate (109f-1) and the pad (109f-3) clamp the sliding block (109b) and the slide rail (109a), so that while the support rod (109f) and the sliding block (109b) move laterally in coordination, the inclined surface of the sliding block (109b) and the inclined surface inside the slide rail (109a) always remain in contact.

5. The fuel cell bipolar plate sealing test device according to claim 3, characterized in that, One end of the support rod (109f) adopts a rectangular structure, and the support rod (109f) is prevented from rotating as it moves with the sliding block (109b).

6. The fuel cell bipolar plate sealing test device according to claim 4, characterized in that, The base (100) is also provided with a horizontal placement platform (111), which is used to ensure that the bipolar plate (106) is held horizontally by the rotating motor (101) and the telescopic motor (102), and can be replaced or adjusted according to different specifications of bipolar plates (106).

7. The fuel cell bipolar plate sealing test device according to claim 1, characterized in that, The jet device (108) also includes an air supply valve and a pressure detection component. The jet pipe (110) is connected to the air supply valve. The pressure detection component is used to detect the sealing performance of the test hole (107) and output the test result after the test is completed.

8. The fuel cell bipolar plate sealing test device according to claim 7, characterized in that, The pressure detection component includes a pressure sensor and a data processing module. The pressure sensor is used to detect the air pressure change in the test hole (107), and the data processing module is used to analyze the detection data to determine whether the sealing performance is qualified.

9. The fuel cell bipolar plate sealing test device according to claim 1, characterized in that, The rotating motor (101) is equipped with an encoder on its shaft. The encoder is used to detect the rotation angle of the bipolar plate (106) and feed the angle data back to the control system to ensure that the bipolar plate (106) reaches the set angle each time it rotates.

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