Bipolar plate airtightness detection equipment of system for producing hydrogen by electrolyzing water

Abstract

The invention relates to the field of hydrogen production through water electrolysis, and discloses bipolar plate airtightness detection equipment for a hydrogen production system through water electrolysis, which comprises a test tool supporting rack, a test fixture tool cylinder is fixedly arranged at the top of the test tool supporting rack, a test upper fixture tool is fixedly arranged at the output end of the test fixture tool cylinder, and a test lower fixture tool is fixedly arranged at the output end of the test upper fixture tool. A first bipolar plate feeding and discharging sliding table is installed on one side of the testing tool supporting rack, a bipolar plate A face testing sliding table tool is installed on the top of the first bipolar plate feeding and discharging sliding table, and a second bipolar plate feeding and discharging sliding table is installed on the side, away from the first bipolar plate feeding and discharging sliding table, of the testing tool supporting rack. A first bipolar plate feeding and discharging sliding table and a second bipolar plate feeding and discharging sliding table are arranged, a bipolar plate feeding and discharging sliding table sliding servo driving structure is connected with a bipolar plate A face testing sliding table tool and a bipolar plate B face testing sliding table tool, and a testing jig tool air cylinder drives a testing upper jig tool to operate.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production by electrolysis of water, and in particular to a bipolar plate air tightness detection device for a hydrogen production system by electrolysis of water. Background Art

[0002] The low-pressure, high-density alkaline water electrolysis hydrogen production system first uses an alkaline aqueous solution as an electrolyte, and uses direct current to decompose water into hydrogen and oxygen. "Low pressure" refers to a relatively low operating pressure, a few MPa or even lower, which reduces equipment costs and safety risks; "high density" means a large current density, exceeding 1A / cm², which increases the hydrogen production rate; "alkaline" is conducive to ion conduction and has low corrosion to electrodes. In the low-pressure, high-density alkaline water electrolysis hydrogen production system, the bipolar plate is a key component of the electrolyzer. It is mostly made of graphite, metal or composite materials, with specific flow channels on the surface, which can separate the oxygen produced by the anode and the hydrogen produced by the cathode to ensure safety; it can conduct current to allow the electrolysis reaction to proceed evenly and improve efficiency; it can also distribute reactants, discharge products, and provide mechanical support for electrodes and diaphragms to ensure system stability.

[0003] High-quality bipolar plates can reduce resistance, reduce energy consumption, and extend life. Reasonable flow channel design can improve hydrogen production performance. Bipolar plates play an important role in separating hydrogen and oxygen and conducting current. If the airtightness of the bipolar plate is not good, hydrogen and oxygen will leak and mix with each other to form an explosive mixture, which will bring serious safety hazards. At the same time, gas leakage will also reduce electrolysis efficiency, increase energy consumption, and affect the performance and economy of the system. Therefore, it is necessary to conduct airtightness testing on the bipolar plate.

[0004] Most of the traditional bipolar plate air tightness detection equipment is manually operated, resulting in low detection efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a bipolar plate air tightness detection device for a water electrolysis hydrogen production system, which solves the problem that most traditional bipolar plate air tightness detection devices are manually operated, resulting in low detection efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bipolar plate airtightness detection device for a water electrolysis hydrogen production system, comprising a test fixture support frame, a test fixture tooling cylinder is fixedly arranged on the top of the test fixture support frame, a test upper fixture tooling is fixedly arranged on the output end of the test fixture tooling cylinder, a first bipolar plate loading and unloading slide is installed on one side of the test fixture support frame, a bipolar plate A-side test slide tooling is installed on the top of the first bipolar plate loading and unloading slide, and the test fixture support frame is away from the first A second bipolar plate loading and unloading slide is installed on one side of the bipolar plate loading and unloading slide, and a bipolar plate B-side test slide tooling is installed on the top of the second bipolar plate loading and unloading slide, and a bipolar plate loading and unloading slide sliding servo drive structure is symmetrically fixed on one side of the test tooling support frame, wherein one output end of the bipolar plate loading and unloading slide sliding servo drive structure is fixedly set on one side of the bipolar plate A-side test slide tooling, and the other output end of the bipolar plate loading and unloading slide sliding servo drive structure is fixedly set on one side of the bipolar plate B-side test slide tooling.

[0007] Preferably, the upper test fixture is located inside a test fixture support frame, and an observation tester is provided on one side of the upper test fixture.

[0008] Preferably, the bipolar plate A side test slide fixture and the bipolar plate B side test slide fixture are both located below the test upper fixture fixture.

[0009] Preferably, a bipolar plate is arranged on the top of the bipolar plate A-side test slide tooling, and the test upper fixture tooling is used to perform airtightness detection on the bipolar plate.

[0010] Preferably, a control panel is installed on one side of the top of the test tool support frame.

[0011] Preferably, a fault alarm is installed on the other side of the top of the test tool support frame.

[0012] A method for detecting the air tightness of a bipolar plate of a water electrolysis hydrogen production system comprises the following steps: S1, placing the bipolar plate on the bipolar plate A-side test slide fixture on the top of the first bipolar plate loading and unloading slide, and then driving the bipolar plate A-side test slide fixture to slide to the test position through one of the bipolar plate loading and unloading slide sliding servo drive structures; S2, then the upper test fixture is driven by the cylinder of the test fixture to press down the bipolar plate on the test slide fixture of the bipolar plate A surface, and the upper test fixture is used to perform an airtightness test on the bipolar plate, and at the same time, the leakage value of the bipolar plate is detected by observing the tester; S3. After the test is completed, the upper test fixture is driven to rise back to its position by the test fixture cylinder, and then the bipolar plate A-side test slide fixture is driven to move out of the test position to the top of the first bipolar plate loading and unloading slide by one of the bipolar plate loading and unloading slide servo drive structures, and then the bipolar plate is taken out from the bipolar plate A-side test slide fixture and turned over; S4, then placing the flipped bipolar plate on the bipolar plate B-side test slide fixture, and driving the bipolar plate B-side test slide fixture to slide to the test position through another bipolar plate loading and unloading slide sliding servo drive structure; S5, then the upper test fixture is driven by the cylinder of the test fixture to press down the bipolar plate on the test slide fixture of the B side of the bipolar plate, and the air tightness test of the bipolar plate is performed by the upper test fixture, and the leakage value of the bipolar plate is detected by observing the tester; S6. After the test is completed, the test fixture cylinder drives the test upper fixture to rise back to its position, and then another bipolar plate loading and unloading slide sliding servo drive structure drives the bipolar plate B side test slide fixture to move out of the test position to the top of the second bipolar plate loading and unloading slide, and then the bipolar plate is taken out from the bipolar plate B side test slide fixture to complete the airtightness test of the bipolar plate.

[0013] Preferably, the airtightness test is performed by passing compressed gas to 1.2-1.5 times of the working pressure of the bipolar plate through a test fixture, and maintaining the pressure for 3-10 minutes.

[0014] The present invention provides a bipolar plate air tightness detection device for a water electrolysis hydrogen production system. It has the following beneficial effects: 1. The present invention sets a first bipolar plate loading and unloading slide and a second bipolar plate loading and unloading slide, and respectively connects with a bipolar plate A-side test slide tooling and a bipolar plate B-side test slide tooling through a bipolar plate loading and unloading slide sliding servo drive structure, and drives the test jig tooling to operate through a test jig tooling cylinder, so that the test jig tooling performs airtightness detection on the bipolar plate, thereby reducing the time of manual intervention, and can quickly and continuously perform airtightness detection on the bipolar plate, thereby achieving a significant improvement in detection efficiency and solving the problem of low detection efficiency due to manual operation.

[0015] 2. The present invention adopts high-precision sensor technology through the observation tester to collect various data in real time and accurately during the bipolar plate airtightness detection process, so as to accurately capture the slight pressure changes and gas leakage of the bipolar plate, and judge whether the airtightness of the bipolar plate is qualified according to the preset standards. At the same time, the automated detection process avoids the interference of human factors on the detection results, ensures the consistency and stability of the detection process, thereby achieving a significant improvement in the detection accuracy, and can meet the strict requirements of the low-voltage and high-electricity alkaline water electrolysis hydrogen production system on the airtightness of the bipolar plate.

[0016] 3. The present invention uses a human-machine interactive interface on the control panel. The operator only needs to input simple detection parameters through the touch screen on the control panel, and the equipment can automatically complete the entire detection process according to the preset program, thereby eliminating the need for the operator to have complex professional knowledge and skills. The automatic operation of the equipment reduces the steps and difficulty of manual operation. The operator only needs to perform basic loading and unloading operations, which reduces the complexity of the operation and labor intensity. Ordinary staff can operate the equipment proficiently after simple training, thereby simplifying the operation of the equipment and improving the usability and popularity of the equipment.

[0017] 4. The present invention monitors the operating status of the equipment and the detection results of the bipolar plate in real time through a fault alarm. When the equipment fails, or an airtight problem is detected in the bipolar plate, and the leakage exceeds the safety threshold, the fault alarm sends out an audible and visual alarm signal, thereby promptly reminding the operator to take corresponding measures. At the same time, the automated operation of the equipment reduces the direct contact between the operator and the detection process, and reduces the risk of the operator being injured in dangerous situations such as high pressure and gas leakage, so that potential safety hazards can be discovered and dealt with in a timely manner, thereby improving the safety of equipment operation and personnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural schematic diagram of the upper and lower material slides of the bipolar plate of the present invention; Figure 2 It is a partial structural schematic diagram of the bipolar plate B-side test slide tooling of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the present invention; Figure 4 It is a front view structural schematic diagram of the present invention; Figure 5 It is a partial structural schematic diagram of the bipolar plate upper and lower material slide table sliding servo drive structure of the present invention; Figure 6 It is a partial structural schematic diagram of the bipolar plate A-side test slide tooling of the present invention; Figure 7 It is a schematic diagram of the partial structure of the bipolar plate of the present invention; Figure 8 This is a method flow chart of a method for detecting air tightness of bipolar plates in a water electrolysis hydrogen production system proposed by the present invention.

[0019] Among them, 1. Bipolar plate A side test slide tooling; 2. Bipolar plate B side test slide tooling; 3. Test fixture tooling cylinder; 4. Test tooling support frame; 5. First bipolar plate loading and unloading slide; 6. Bipolar plate loading and unloading slide sliding servo drive structure; 7. Test upper fixture tooling; 8. Bipolar plate; 9. Control panel; 10. Fault alarm; 11. Second bipolar plate loading and unloading slide. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 1 -Attached Figure 6 The embodiment of the present invention provides a bipolar plate air tightness detection device for a water electrolysis hydrogen production system, comprising a test fixture support frame 4, a test fixture cylinder 3 is fixedly arranged on the top of the test fixture support frame 4, a test upper fixture 7 is fixedly arranged on the output end of the test fixture cylinder 3, a first bipolar plate loading and unloading slide 5 is installed on one side of the test fixture support frame 4, a bipolar plate A-side test slide 1 is installed on the top of the first bipolar plate loading and unloading slide 5, and the test fixture support frame 4 is away from the first bipolar plate loading and unloading slide 5. A second bipolar plate loading and unloading slide 11 is installed on one side, and a bipolar plate B-side test slide tooling 2 is installed on the top of the second bipolar plate loading and unloading slide 11. A bipolar plate loading and unloading slide sliding servo drive structure 6 is symmetrically fixed on one side of the test tooling support frame 4, and the output end of one bipolar plate loading and unloading slide sliding servo drive structure 6 is fixedly set on one side of the bipolar plate A-side test slide tooling 1, and the output end of the other bipolar plate loading and unloading slide sliding servo drive structure 6 is fixedly set on one side of the bipolar plate B-side test slide tooling 2.

[0022] Specifically, the test tooling support frame 4 is the basic structure of the entire testing equipment, providing a platform for installation and support of other components. The frame is made of high-strength metal material to ensure that it has sufficient strength and stability to withstand the pressure and impact generated during the test, facilitate the installation and maintenance of various components, and also ensure the safety of the equipment during operation.

[0023] The test fixture cylinder 3 is fixedly mounted on the top of the test fixture support frame 4, and its output end is connected to the test upper fixture 7. The cylinder adopts high-precision pneumatic components, which can accurately control the up and down movement of the test upper fixture 7. The test upper fixture 7 is located inside the test fixture support frame 4. When the cylinder drives it to move downward, it can fit tightly to the bipolar plate 8 placed on the bipolar plate A side test slide fixture 1 or the bipolar plate B side test slide fixture 2 to form a sealed detection space. An observation tester is provided on one side of the test upper fixture 7. The tester adopts sensor technology and can monitor the pressure changes inside the bipolar plate 8 in real time, so as to determine whether there is an airtight problem in the bipolar plate 8. For example, after a certain pressure of gas is filled into the bipolar plate 8, if the observation tester detects that the pressure drops too fast, it means that there is a leakage in the bipolar plate 8.

[0024] The first bipolar plate loading and unloading slide 5 is installed on one side of the test tooling support frame 4, and the bipolar plate A-side test slide tooling 1 on the top is used to place the A-side of the bipolar plate 8 to be tested. The second bipolar plate loading and unloading slide 11 is installed on the other side of the test tooling support frame 4, and the bipolar plate B-side test slide tooling 2 on the top is used to place the B-side of the bipolar plate 8. Both slide toolings adopt high-precision linear guides and slider structures to achieve smooth sliding. The bipolar plate loading and unloading slide sliding servo drive structure 6 is respectively connected to the bipolar plate A-side test slide tooling 1 and the bipolar plate B-side test slide tooling 2. The drive structure adopts a high-performance servo motor and a precision transmission mechanism, which can accurately control the moving position and speed of the slide tooling. When the bipolar plate 8 needs to be tested, the bipolar plate loading and unloading slide servo drive structure 6 moves the bipolar plate A side test slide tooling 1 or the bipolar plate B side test slide tooling 2 to the test position to facilitate the test upper fixture tooling 7 to perform airtight testing.

[0025] By applying automatic control technology to the bipolar plate airtightness detection equipment, a high-performance servo motor is used to drive the sliding of the bipolar plate loading and unloading slide, and high-precision pneumatic components are used to control the lifting and lowering of the test fixture, so that a series of operations such as loading and unloading, positioning and sealing detection of the bipolar plate can be completed accurately and quickly. And with the help of sensors, various parameters in the detection process, such as pressure, time, etc., can be monitored in real time, so that the detection process can be automatically adjusted according to the preset program to ensure the accuracy and stability of the detection. At the same time, a human-computer interaction interface is set on the control panel. The operator only needs to simply input the detection parameters, and the equipment can run automatically, reducing the link of manual intervention, thereby realizing the full automation and intelligence of the bipolar plate airtightness detection. The detection cycle is shortened and the number of detections per unit time is increased, thereby solving the problem that most traditional bipolar plate airtightness detection equipment is manually operated, resulting in low detection efficiency.

[0026] Please see attached Figure 1 -Attached Figure 7 The test upper jig tooling 7 is located inside the test tooling support frame 4, and an observation tester is arranged on one side of the test upper jig tooling 7; the bipolar plate A side test slide tooling 1 and the bipolar plate B side test slide tooling 2 are both located below the test upper jig tooling 7; a bipolar plate 8 is arranged on the top of the bipolar plate A side test slide tooling 1, and the test upper jig tooling 7 is used to perform airtightness detection on the bipolar plate 8; a control panel 9 is installed on one side of the top of the test tooling support frame 4; a fault alarm 10 is installed on the other side of the top of the test tooling support frame 4.

[0027] Specifically, the control panel 9 is installed on one side of the top of the test fixture support frame 4. The control panel 9 adopts a human-computer interaction interface, and the operator can input various test parameters, such as test pressure, pressure holding time, etc., through the touch screen. At the same time, the control panel 9 can also display the operating status and test results of the equipment in real time, which is convenient for the operator to monitor and manage. For example, the operator can set the test pressure to 0.8MPa and the pressure holding time to 5 minutes on the control panel 9. The equipment will perform airtightness detection according to the set parameters and display the test results on the screen.

[0028] The fault alarm 10 is installed on the other side of the top of the test tool support frame 4. When the equipment fails during operation or detects that the bipolar plate 8 has a serious airtight problem, the fault alarm 10 will send out an audible and visual alarm signal to remind the operator to deal with it in time. For example, when the observation tester detects that the leakage of the bipolar plate 8 exceeds the set safety threshold, the fault alarm 10 will immediately sound an alarm, and the control panel 9 will also display the corresponding fault information.

[0029] Please see attached Figure 8 A method for detecting the air tightness of a bipolar plate in a water electrolysis hydrogen production system comprises the following steps: S1, placing the bipolar plate 8 on the bipolar plate A-side test slide fixture 1 on the top of the first bipolar plate loading and unloading slide 5, and then driving the bipolar plate A-side test slide fixture 1 to slide to the test position through one of the bipolar plate loading and unloading slide servo drive structures 6; S2, then drive the upper test fixture 7 to press down the bipolar plate 8 on the bipolar plate A surface test slide 1 through the test fixture cylinder 3, and perform airtightness detection on the bipolar plate 8 through the test upper fixture 7, and detect the leakage value of the bipolar plate 8 by observing the tester; S3, after the test is completed, the upper test fixture 7 is driven to rise back to its position by the test fixture cylinder 3, and then the bipolar plate A-side test slide fixture 1 is driven to move out of the test position to the top of the first bipolar plate loading and unloading slide 5 by one of the bipolar plate loading and unloading slide servo drive structures 6, and then the bipolar plate 8 is taken out from the bipolar plate A-side test slide fixture 1 and turned over; S4, then placing the flipped bipolar plate 8 on the bipolar plate B-side test slide fixture 2, and driving the bipolar plate B-side test slide fixture 2 to slide to the test position through another bipolar plate loading and unloading slide servo drive structure 6; S5, then drive the upper test fixture 7 to press down the bipolar plate 8 on the test slide 2 on the B side of the bipolar plate through the test fixture cylinder 3, and perform airtightness detection on the bipolar plate 8 through the upper test fixture 7, and detect the leakage value of the bipolar plate 8 by observing the tester; S6. After the test is completed, the test fixture cylinder 3 drives the test upper fixture 7 to rise back to its position, and then the other bipolar plate loading and unloading slide servo drive structure 6 drives the bipolar plate B side test slide fixture 2 to move out of the test position to the top of the second bipolar plate loading and unloading slide 11, and then the bipolar plate 8 is taken out from the bipolar plate B side test slide fixture 2 to complete the airtightness detection of the bipolar plate 8.

[0030] The airtightness test is performed by passing compressed gas to 1.2-1.5 times of its working pressure through the test fixture 7 to the bipolar plate 8, and maintaining the pressure for 3-10 minutes.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate air tightness detection device for a water electrolysis hydrogen production system, comprising a test tool support frame (4), characterized in that: A test fixture cylinder (3) is fixedly arranged on the top of the test fixture support frame (4); a test upper fixture (7) is fixedly arranged on the output end of the test fixture cylinder (3); a first bipolar plate loading and unloading slide (5) is installed on one side of the test fixture support frame (4); a bipolar plate A-side test slide fixture (1) is installed on the top of the first bipolar plate loading and unloading slide (5); and a second bipolar plate loading and unloading slide (11) is installed on the side of the test fixture support frame (4) away from the first bipolar plate loading and unloading slide (5). A bipolar plate B-side test slide fixture (2) is installed on the top of the second bipolar plate loading and unloading slide (11), and a bipolar plate loading and unloading slide sliding servo drive structure (6) is symmetrically fixedly arranged on one side of the test fixture support frame (4), wherein one output end of the bipolar plate loading and unloading slide sliding servo drive structure (6) is fixedly arranged on one side of the bipolar plate A-side test slide fixture (1), and the other output end of the bipolar plate loading and unloading slide sliding servo drive structure (6) is fixedly arranged on one side of the bipolar plate B-side test slide fixture (2).

2. The bipolar plate air tightness detection device of the water electrolysis hydrogen production system according to claim 1, characterized in that: The upper test fixture (7) is located inside the test fixture support frame (4), and an observation tester is provided on one side of the upper test fixture (7).

3. The bipolar plate air tightness detection device of the water electrolysis hydrogen production system according to claim 1, characterized in that: The bipolar plate A side test slide fixture (1) and the bipolar plate B side test slide fixture (2) are both located below the test upper fixture fixture (7).

4. The bipolar plate air tightness detection device of the water electrolysis hydrogen production system according to claim 1, characterized in that: A bipolar plate (8) is arranged on the top of the bipolar plate A-side test slide fixture (1), and the test upper fixture fixture (7) is used to perform airtightness detection on the bipolar plate (8).

5. The bipolar plate air tightness detection device of the water electrolysis hydrogen production system according to claim 1, characterized in that: A control panel (9) is installed on one side of the top of the test tool support frame (4).

6. The bipolar plate air tightness detection device of the water electrolysis hydrogen production system according to claim 1, characterized in that: A fault alarm (10) is installed on the other side of the top of the test tool support frame (4).

7. A method for detecting the air tightness of bipolar plates in a water electrolysis hydrogen production system, characterized in that: A bipolar plate air tightness detection device applied to a water electrolysis hydrogen production system according to any one of claims 1 to 6 comprises the following steps: S1, placing the bipolar plate (8) on the bipolar plate A-side test slide fixture (1) on the top of the first bipolar plate loading and unloading slide (5), and then driving the bipolar plate A-side test slide fixture (1) to slide to a test position through one of the bipolar plate loading and unloading slide servo drive structures (6); S2, then driving the upper test fixture (7) to press the bipolar plate (8) on the bipolar plate A surface test slide fixture (1) downwards by using the test fixture cylinder (3), and performing an airtightness test on the bipolar plate (8) by using the upper test fixture (7), and at the same time detecting the leakage value of the bipolar plate (8) by observing the tester; S3, after the test is completed, the upper test fixture (7) is driven to rise back to its original position by the test fixture cylinder (3), and then the bipolar plate A-side test slide fixture (1) is driven to move out of the test position to the top of the first bipolar plate loading and unloading slide (5) by one of the bipolar plate loading and unloading slide servo drive structures (6), and then the bipolar plate (8) is taken out from the bipolar plate A-side test slide fixture (1) and turned over; S4, then placing the flipped bipolar plate (8) onto the bipolar plate B-side test slide fixture (2), and driving the bipolar plate B-side test slide fixture (2) to slide to a test position through another bipolar plate loading and unloading slide servo drive structure (6); S5, then driving the upper test fixture (7) to press downward the bipolar plate (8) on the B-side test slide fixture (2) of the bipolar plate by means of the test fixture cylinder (3), and performing an airtightness test on the bipolar plate (8) by means of the test fixture upper fixture (7), while detecting the leakage value of the bipolar plate (8) by means of an observation tester; S6. After the test is completed, the upper test fixture (7) is driven to rise back to its original position by the test fixture cylinder (3), and then the bipolar plate B-side test slide fixture (2) is driven to move out of the test position to the top of the second bipolar plate loading and unloading slide (11) by another bipolar plate loading and unloading slide servo drive structure (6), and then the bipolar plate (8) is taken out from the bipolar plate B-side test slide fixture (2), completing the airtightness test of the bipolar plate (8).

8. The method for detecting air tightness of bipolar plates in a water electrolysis hydrogen production system according to claim 7, characterized in that: The airtightness test is performed by passing compressed gas to 1.2-1.5 times the working pressure of the bipolar plate (8) through the test upper fixture (7), and maintaining the pressure for 3-10 minutes.

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