Defect detection equipment for sealing strip on bipolar plate of fuel cell

Abstract

The utility model relates to the technical field of equipment detection, and discloses a defect detection device for a sealing strip on a bipolar plate of a fuel cell, which comprises a table body, a frame body, a product placing platform, a light illumination tool and a visual detection system, the table body is horizontally placed on the ground, the frame body is fixedly connected above the table body, one side of the frame body is provided with an opening, and the visual detection system is arranged on the frame body. The product containing platform is fixedly connected to the upper portion of the platform body and located in the frame body, the lamplight illumination tool is arranged above the product containing platform and located in the frame body, the lamplight illumination tool comprises a plurality of illumination lamps with different brightness, and all the illumination lamps are arranged on the side, facing the product containing platform, of the lamplight illumination tool. The visual detection system is arranged above the lamplight illumination tool and located in the frame body, and an image processing module is arranged in the visual detection system. According to the equipment, high-precision detection of micro bubbles and defects in the fuel cell is realized, so that the qualified rate of products is improved, and the service life of the products is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of equipment detection, and in particular to a sealing strip defect detection device on a bipolar plate of a fuel cell. Background Art

[0002] With the rise of the new energy industry, fuel cells that use hydrogen and oxygen to generate electricity through chemical reactions have become popular. The hydrogen-oxygen reaction process in fuel cells not only has extremely high energy utilization efficiency, but also only emits water, without any pollution to the environment. However, the characteristics of hydrogen itself, such as leakage, diffusion, and explosion, make fuel cells have certain safety hazards. The safety of this new energy power system has become the first concern of people. Therefore, as the core part of the fuel cell, the product is usually used to seal the anode and cathode cavities on the stack, so testing the product becomes a critical step.

[0003] In the prior art, product testing usually uses airtightness testing equipment, that is, the airtightness of the sealed bipolar plate or membrane electrode is tested by the pressure difference method or the flow method, which is specifically described as follows: the pressure difference method is to make the bipolar plate after the anode and cathode are sealed, and the tooling, switch valve, etc. form a closed space, and then introduce a gas with a certain air pressure into the cavity, and then close the switch valve to seal it. After waiting for a certain period of time, if the pressure on the pressure gauge decreases, it indicates that there is a leakage phenomenon; the flow method is to make the bipolar plate or membrane electrode after the anode and cathode are sealed, and the tooling, switch valve, etc. form a closed space, and then close the switch valve at the outlet of the cavity to be tested, keep the inlet switch valve in an open state, observe whether the flow meter has a reading, if there is a reading, it indicates that there is a leakage phenomenon, and finally identify whether the sealing strip is defective by human eyes.

[0004] However, the above-mentioned prior art has the following disadvantages: when some extremely small defects on the product, such as extremely tiny bubbles, compressible foreign matter, etc., are difficult to be identified by the airtightness detection equipment, they flow into the subsequent stacking process, resulting in the stacking of hundreds of single cells, and the tiny bubbles and compressible foreign matter are also superimposed, resulting in a large leakage in the stack; when using airtightness detection, it is difficult to detect small bubbles on the surface of some thin cathode products and foreign matter on the surface of the product, so that unqualified sealed bipolar plates or membrane electrodes flow into the stacking process, which can easily cause leakage of the stack and reduce the service life of the product; identifying product defects by human eyes is unreliable and unstable, and the product qualification rate cannot be guaranteed. Utility Model Content

[0005] The present application provides a sealing strip defect detection device on a fuel cell bipolar plate, which is used to solve the problems of short service life and low pass rate of the sealing strip in the prior art.

[0006] The present application provides a sealing strip defect detection device on a fuel cell bipolar plate, comprising a platform, a frame, a product placement platform, a lighting fixture and a visual inspection system, wherein the platform is horizontally placed on the ground, the frame is fixedly connected to the top of the platform, and an opening is provided on one side of the frame, the product placement platform is fixedly connected to the top of the platform, and the product placement platform is located inside the frame, the lighting fixture is provided above the product placement platform, and the lighting fixture is located inside the frame, the lighting fixture comprises a plurality of lighting lamps of different brightness, and each lighting lamp is provided on a side of the lighting fixture facing the product placement platform, the visual inspection system is provided above the lighting fixture, and the visual inspection system is located inside the frame, and an image processing module is provided in the visual inspection system.

[0007] Optionally, the visual inspection system includes a high-definition surface camera and an industrial computer, wherein the high-definition surface camera is arranged above the lighting fixture, and the high-definition surface camera is located inside the frame, and the industrial computer is arranged above the lighting fixture, and the industrial computer is located inside the frame and is connected to the high-definition surface camera through a data signal line, and an image processing module is provided in the industrial computer.

[0008] Optionally, the lighting fixture is connected to the platform body via a supporting frame, and there are four supporting frames.

[0009] Optionally, the sealing strip defect detection device also includes a first suspension bracket, which is arranged on the top of the frame, and the first suspension bracket connects the frame and the high-definition orthographic camera.

[0010] Optionally, the sealing strip defect detection device further includes a second suspension bracket, which is disposed on the top of the frame and connects the frame and the industrial computer.

[0011] Optionally, the sealing strip defect detection device further includes two safety gratings, and the two safety gratings are respectively arranged on both sides of the opening of the frame.

[0012] Optionally, a ground locking roller is provided at the bottom of the platform.

[0013] A sealing strip defect detection device on a fuel cell bipolar plate in the present application has the following advantages:

[0014] The device uses lighting fixtures to supplement the product, thereby ensuring that the product is within a reasonable exposure range; the device sets an image processing module in the visual inspection system to efficiently search and capture all defects of the product, thereby achieving high-precision detection of microscopic bubbles and defects in fuel cells, which can greatly reduce the occurrence of stack leakage incidents, thereby improving the product's qualification rate and extending the product's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a sealing strip defect detection device on a fuel cell bipolar plate provided in an embodiment of the present application.

[0017] In the figure: 1. table body; 2. frame; 3. product placement platform; 4. lighting fixtures; 5. visual inspection system; 51. high-definition orthographic camera; 52. industrial computer; 6. data signal line; 7. support frame; 8. first suspension frame; 9. second suspension frame; 10. safety grating; 11. ground lock roller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Figure 1 A schematic diagram of the structure of a sealing strip defect detection device on a fuel cell bipolar plate provided in an embodiment of the present application. The embodiment of the present application provides a sealing strip defect detection device on a fuel cell bipolar plate, including a platform 1, a frame 2, a product placement platform 3, a lighting fixture 4 and a visual inspection system 5, wherein the platform 1 is horizontally placed on the ground, the frame 2 is fixedly connected to the top of the platform 1, and one side of the frame 2 is provided with an opening, the product placement platform 3 is fixedly connected to the top of the platform 1, and the product placement platform 3 is located inside the frame 2, the lighting fixture 4 is arranged above the product placement platform 3, and the lighting fixture 4 is located inside the frame 2, the lighting fixture 4 includes a plurality of lighting lamps of different brightness, and each lighting lamp is arranged on the side of the lighting fixture 4 facing the product placement platform 3, the visual inspection system 5 is arranged above the lighting fixture 4, and the visual inspection system 5 is located inside the frame 2, and an image processing module is arranged in the visual inspection system 5.

[0020] The platform 1 is a solid body, fixedly connected to the frame 2, and the front of the frame 2 is open, so that the staff can take the product easily.

[0021] When the product needs to be tested, the product to be tested (i.e. the bipolar plate with the sealing strip) is placed on the product placement platform 3, ensuring that the sealing strip faces upward, and then the brightness of the lighting fixture 4 is adjusted by adjusting the number of lighting lamps.

[0022] In a possible embodiment, the visual inspection system 5 includes a high-definition surface camera 51 and an industrial computer 52, wherein the high-definition surface camera 51 is arranged above the lighting fixture 4, and the high-definition surface camera 51 is located inside the frame 2, and the industrial computer 52 is arranged above the lighting fixture 4, and the industrial computer 52 is located inside the frame 2, and is connected to the high-definition surface camera 51 through a data signal line 6, and an image processing module is provided in the industrial computer 52.

[0023] Specifically, the high-definition orthographic camera 51 is a ten-million-pixel orthographic camera, which can take pictures of the area that needs to be inspected in the product (ie, the bipolar plate with the sealing strip).

[0024] In a possible embodiment, the lighting fixture 4 is connected to the platform 1 via a support frame 7 , and there are four support frames 7 .

[0025] A support frame 7 is provided above the platform 1 to facilitate fixing of the light fixture 4, and the provision of four support frames 7 makes the fixing of the light fixture 4 more stable and will not shift during photographing, thereby ensuring the exposure effect.

[0026] In a possible embodiment, the sealing strip defect detection device further includes a first suspension bracket 8 , which is disposed on the top of the frame 2 , and the first suspension bracket 8 connects the frame 2 and the high-definition orthographic camera 51 .

[0027] Specifically, the first suspension bracket 8 is used to fix the high-definition planar camera 51, so as to facilitate taking pictures of the area that needs to be inspected in the product (ie, the bipolar plate with a sealing strip), thereby ensuring the photographic effect.

[0028] In a possible embodiment, the sealing strip defect detection device further includes a second suspension bracket 9 , which is disposed on the top of the frame 2 , and the second suspension bracket 9 connects the frame 2 and the industrial computer 52 .

[0029] Specifically, the second suspension bracket 9 is used to fix the industrial computer 52 to ensure that the industrial computer 52 works normally.

[0030] In a possible embodiment, the sealing strip defect detection device further includes two safety gratings 10 , and the two safety gratings 10 are respectively arranged on both sides of the opening of the frame 2 .

[0031] For example, when a product needs to be inspected, the safety light barrier is activated to prevent personnel from operating the product incorrectly, thereby ensuring the safety of the product and personnel.

[0032] In a possible embodiment, a ground locking roller 11 is provided at the bottom of the platform 1 to facilitate the movement of the sealing strip defect detection device and improve the applicability of the device.

[0033] The embodiment of the present application proposes a sealing strip defect detection device on a fuel cell bipolar plate, which uses a lighting fixture 4 to supplement the light of the product, thereby ensuring that the product is within a reasonable exposure range; the device sets an image processing module in the visual inspection system 5 to efficiently search and capture all defects of the product, thereby achieving high-precision detection of microscopic bubbles and defects in the fuel cell, which can greatly reduce the occurrence of stack leakage incidents, thereby improving the product's qualification rate and extending the product's service life.

[0034] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A sealing strip defect detection device on a fuel cell bipolar plate, characterized in that: include: The platform (1) is placed horizontally on the ground; A frame (2) is fixedly connected to the top of the platform (1), and one side of the frame (2) is provided with an opening; A product placement platform (3) is fixedly connected to the top of the platform (1), and the product placement platform (3) is located inside the frame (2); A lighting fixture (4) is arranged above the product placement platform (3), and the lighting fixture (4) is located inside the frame (2), the lighting fixture (4) comprises a plurality of lighting lamps of different brightness, and each of the lighting lamps is arranged on a side of the lighting fixture (4) facing the product placement platform (3); The visual inspection system (5) is arranged above the lighting fixture (4), and the visual inspection system (5) is located inside the frame (2). An image processing module is arranged in the visual inspection system (5).

2. A sealing strip defect detection device on a fuel cell bipolar plate according to claim 1, characterized in that: The visual inspection system (5) comprises: A high-definition orthographic camera (51) is arranged above the lighting fixture (4), and the high-definition orthographic camera (51) is located inside the frame (2); An industrial computer (52) is arranged above the lighting fixture (4); the industrial computer (52) is located inside the frame (2) and is connected to the high-definition orthographic camera (51) via a data signal line (6); and an image processing module is arranged in the industrial computer (52).

3. The sealing strip defect detection device on a fuel cell bipolar plate according to claim 1, characterized in that: The lighting fixture (4) is connected to the platform (1) via a support frame (7), and there are four support frames (7).

4. A sealing strip defect detection device on a fuel cell bipolar plate according to claim 2, characterized in that: It also comprises a first suspension frame (8), wherein the first suspension frame (8) is arranged on the top of the frame (2), and the first suspension frame (8) connects the frame (2) and the high-definition orthographic camera (51).

5. The sealing strip defect detection device on a fuel cell bipolar plate according to claim 2, characterized in that: It also comprises a second suspension frame (9), wherein the second suspension frame (9) is arranged on the top of the frame (2), and the second suspension frame (9) connects the frame (2) and the industrial computer (52).

6. The sealing strip defect detection device on a fuel cell bipolar plate according to claim 1, characterized in that: Also includes: Two safety gratings (10) are respectively arranged on two sides of the opening of the frame (2).

7. The sealing strip defect detection device on a fuel cell bipolar plate according to claim 1, characterized in that: A ground locking roller (11) is provided at the bottom of the platform (1).

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