Galvanic pile airtightness detection equipment

Abstract

The utility model relates to the related technical field of galvanic pile detection, in particular to galvanic pile airtightness detection equipment which comprises a placing plate, a placing box is fixedly connected to the upper surface of the placing plate, and a positioning mechanism is arranged on the inner side surface of the placing box. According to the electric pile airtightness detection equipment, through the arrangement of the clamping mechanism, when a to-be-detected electric pile needs to be clamped, a motor is started to drive a threaded rod to rotate, under the rotation action of the threaded rod, a connecting plate moves in the axial direction of the threaded rod, a connecting block and a limiting block also move along with the threaded rod, the connecting plate drives a clamping block to get close to the to-be-detected electric pile, and the clamping block clamps the to-be-detected electric pile; when the to-be-detected galvanic pile needs to be loosened, the motor rotates reversely and drives the threaded rod to rotate reversely, so that the connecting plate moves in the opposite direction, the clamping block loosens the to-be-detected galvanic pile, the to-be-detected galvanic pile can be stably fixed through the arrangement of the clamping mechanism, the position of the to-be-detected galvanic pile is stable in the detection process, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stack detection, in particular to a stack airtightness detection device. Background Technique

[0002] A stack is one of the core components in a fuel cell system. A stack is usually composed of multiple single cells stacked in series. Each single cell generally includes a membrane electrode assembly (composed of a proton exchange membrane, a catalyst layer, and a gas diffusion layer), bipolar plates and other main components. With the continuous development of new energy technologies, as an important energy conversion device, the performance and reliability of the stack are crucial. Among them, the airtightness of the stack is one of the key factors affecting its performance and safety. Therefore, there is a particular need for a stack airtightness detection device.

[0003] However, the existing stack airtightness detection devices are complex to operate. During detection, the placement of the stack is not stable enough, which easily leads to low detection accuracy and is difficult to meet the high requirements for stack airtightness detection in modern industrial production. Content of the Utility Model

[0004] The purpose of the utility model is to provide a stack airtightness detection device to solve the problems in the above background technique that the existing stack airtightness detection devices are complex to operate, the placement of the stack is not stable enough during detection, which easily leads to low detection accuracy and is difficult to meet the high requirements for stack airtightness detection in modern industrial production.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A stack airtightness detection device includes a placement plate. The lower surface of the placement plate is fixedly connected with a control panel. The lower surface of the placement plate is fixedly connected with a bracket. The upper surface of the placement plate is fixedly connected with a placement box. A positioning mechanism is arranged on the inner surface of the placement box. A clamping mechanism is arranged on the upper surface of the placement box. A lifting mechanism is arranged on the upper surface of the placement plate.

[0006] The clamping mechanism includes a fixed block, a motor, a threaded rod, a connecting plate, a connecting block, a limiting block, a limiting plate, a limiting groove, a fixing plate, a clamping block and an anti-slip block. The upper surface of the placement box is fixedly connected with a fixed block. One end surface of the fixed block is fixedly connected with a motor. One end surface of the motor is fixedly connected with a threaded rod. The outer surface of the threaded rod is threadedly connected with a connecting plate. One side surface of the connecting plate is fixedly connected with a connecting block. One side surface of the connecting block is fixedly connected with a limiting block. The outer surface of the limiting block is slidably connected with a limiting plate. A limiting groove is opened on the inner surface of the limiting plate. One side surface of the limiting plate is fixedly connected with a fixing plate. One side surface of the connecting plate is fixedly connected with a clamping block. One side surface of the clamping block is fixedly connected with an anti-slip block.

[0007] Preferably, the connecting plate is slidably structured by a motor and a threaded rod, and two sets of connecting blocks are symmetrically arranged with respect to the central axis of the connecting plate.

[0008] Preferably, two sets of limiting blocks are symmetrically arranged with respect to the central axis of the connecting block, and the outer wall dimensions of the limiting blocks match the inner wall dimensions of the limiting grooves.

[0009] Preferably, two sets of limiting plates are provided, and multiple sets of anti-sliding blocks are arranged at equal intervals on one side surface of the clamping block.

[0010] Preferably, the positioning mechanism includes a positioning block, a positioning groove, a sealing ring, a fuel cell stack to be tested, an intake pipe, and an exhaust pipe. The inner surface of the placement box is fixedly connected with a positioning block, the inner surface of the positioning block is provided with a positioning groove, a sealing ring is fixedly connected to the upper surface of the positioning groove, the fuel cell stack to be tested is snap-fitted to the surface of the sealing ring, an intake pipe is fixedly connected to one side surface of the positioning block, and an exhaust pipe is fixedly connected to one side surface of the positioning block.

[0011] Preferably, the lifting mechanism includes a fixed rod, a stabilizing plate, a cylinder, a telescopic rod, a lifting plate, a stabilizing rod, and an induction pressing plate. The upper surface of the placement plate is fixedly connected with a fixed rod, one end surface of the fixed rod is fixedly connected with a stabilizing plate, the upper surface of the stabilizing plate is fixedly connected with a cylinder, one end surface of the cylinder is fixedly connected with a telescopic rod, one end surface of the telescopic rod is fixedly connected with a lifting plate, the lower surface of the lifting plate is fixedly connected with a stabilizing rod, and one end surface of the stabilizing rod is fixedly connected with an induction pressing plate.

[0012] Preferably, multiple sets of fixed rods are arranged at the four corners of the stabilizing plate, and the lifting plate is structured to be lifted by the cylinder and the telescopic rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this fuel cell stack airtight detection device, through the setting of the clamping mechanism, when it is necessary to clamp the fuel cell stack to be tested, the motor is started to drive the threaded rod to rotate. Since the threaded rod is threadedly connected to the connecting plate, under the rotation of the threaded rod, the connecting plate starts to move along the axial direction of the threaded rod. As the connecting plate moves, the connecting block and the limiting block fixed thereto also move accordingly. The limiting block slides in the limiting groove of the limiting plate, making the moving direction of the connecting plate stable without deviation or rotation. The movement of the connecting plate drives the clamping block to approach the fuel cell stack to be tested, and finally the clamping block clamps the fuel cell stack to be tested. The anti-sliding blocks on one side surface of the clamping block increase the friction force with the fuel cell stack to be tested, preventing the fuel cell stack to be tested from sliding during the clamping process. When it is necessary to release the fuel cell stack to be tested, the motor rotates in the reverse direction to drive the threaded rod to rotate in the reverse direction, so that the connecting plate moves in the opposite direction and the clamping block releases the fuel cell stack to be tested. Through the setting of the clamping mechanism, the fuel cell stack to be tested can be stably fixed, so that the position of the fuel cell stack to be tested is stable during the detection process, thereby improving the detection accuracy. Brief Description of the Drawings

[0014] Figure 1 This is a schematic side view of the external structure of the present utility model;

[0015] Figure 2 This is a schematic diagram of the cooperating structure of the air outlet pipe and the air inlet pipe of the present utility model;

[0016] Figure 3 This is a schematic diagram of the cooperating structure of the limiting groove and the limiting block of the present utility model;

[0017] Figure 4 This is a schematic diagram of the cooperating structure of the induction pressing plate and the stabilizing rod of the present utility model.

[0018] In the figures: 1, placing plate; 2, control panel; 3, bracket; 4, placing box; 5, positioning mechanism; 501, positioning block; 502, positioning groove; 503, sealing ring; 504, fuel cell stack to be measured; 505, air inlet pipe; 506, air outlet pipe; 6, clamping mechanism; 601, fixing block; 602, motor; 603, threaded rod; 604, connecting plate; 605, connecting block; 606, limiting block; 607, limiting plate; 608, limiting groove; 609, fixing plate; 610, clamping block; 611, anti-slip block; 7, lifting mechanism; 701, fixing rod; 702, stabilizing plate; 703, cylinder; 704, telescopic rod; 705, lifting plate; 706, stabilizing rod; 707, induction pressing plate. Detailed Description of the Preferred Embodiment

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution: a fuel cell stack airtight detection device, including a placing plate 1, a control panel 2 is fixedly connected to the lower surface of the placing plate 1, a bracket 3 is fixedly connected to the lower surface of the placing plate 1, a placing box 4 is fixedly connected to the upper surface of the placing plate 1, a positioning mechanism 5 is arranged on the inner surface of the placing box 4, a clamping mechanism 6 is arranged on the upper surface of the placing box 4, and a lifting mechanism 7 is arranged on the upper surface of the placing plate 1;

[0021] The clamping mechanism 6 includes a fixed block 601, a motor 602, a threaded rod 603, a connecting plate 604, a connecting block 605, a limiting block 606, a limiting plate 607, a limiting groove 608, a fixing plate 609, a clamping block 610 and an anti-slip block 611. The upper surface of the placement box 4 is fixedly connected with the fixed block 601. One end surface of the fixed block 601 is fixedly connected with the motor 602. One end surface of the motor 602 is fixedly connected with the threaded rod 603. The outer surface of the threaded rod 603 is threadedly connected with the connecting plate 604. One side surface of the connecting plate 604 is fixedly connected with the connecting block 605. One side surface of the connecting block 605 is fixedly connected with the limiting block 606. The outer surface of the limiting block 606 is slidably connected with the limiting plate 607. The inner surface of the limiting plate 607 is provided with the limiting groove 608. One side surface of the limiting plate 607 is fixedly connected with the fixing plate 609. One side surface of the connecting plate 604 is fixedly connected with the clamping block 610. One side surface of the clamping block 610 is fixedly connected with the anti-slip block 611. Through the settings of the fixed block 601, the motor 602, the threaded rod 603, the connecting plate 604, the connecting block 605, the limiting block 606, the limiting plate 607, the limiting groove 608, the fixing plate 609, the clamping block 610 and the anti-slip block 611, when in use, when it is necessary to clamp the battery stack 504 to be measured, the motor 602 is started to drive the threaded rod 603 to rotate. Since the threaded rod 603 is threadedly connected with the connecting plate 604, under the rotational action of the threaded rod 603, the connecting plate 604 starts to move along the axial direction of the threaded rod 603. As the connecting plate 604 moves, the connecting block 605 and the limiting block 606 fixed thereon also move accordingly. The limiting block 606 slides in the limiting groove 608 of the limiting plate 607, making the moving direction of the connecting plate 604 stable without deviation or rotation. The movement of the connecting plate 604 drives the clamping block 610 to approach the battery stack 504 to be measured. Finally, the clamping block 610 clamps the battery stack 504 to be measured. The anti-slip block 611 on one side surface of the clamping block 610 increases the friction force with the battery stack 504 to be measured, preventing the battery stack 504 to be measured from sliding during the clamping process. When it is necessary to release the battery stack 504 to be measured, the motor 602 rotates in the reverse direction to drive the threaded rod 603 to rotate in the reverse direction, so that the connecting plate 604 moves in the opposite direction, and the clamping block 610 releases the battery stack 504 to be measured. Through the setting of the clamping mechanism 6, the battery stack 504 to be measured can be stably fixed, so that the position of the battery stack 504 to be measured is stable during the detection process, thereby improving the detection accuracy.

[0022] Furthermore, the connecting plate 604 and the threaded rod 603 form a sliding structure through the motor 602. Two sets of connecting blocks 605 are symmetrically arranged with respect to the central axis of the connecting plate 604. With the arrangement of the connecting blocks 605, during use, two sets of connecting blocks 605 are symmetrically arranged with respect to the central axis of the connecting plate 604. Such a design can make the force on the connecting plate 604 more uniform during the sliding process. When the connecting plate 604 moves under the action of the threaded rod 603, the symmetrically arranged connecting blocks 605 can share this force together, making the movement of the connecting plate 604 more stable.

[0023] Furthermore, two sets of limiting blocks 606 are symmetrically arranged with respect to the central axis of the connecting block 605. The outer wall size of the limiting block 606 matches the inner wall size of the limiting groove 608. With the arrangement of the limiting block 606 and the limiting groove 608, during use, the outer wall size of the limiting block 606 matches the inner wall size of the limiting groove 608, enabling the limiting block 606 to slide tightly within the limiting groove 608 without loosening or shaking. This tight fit provides precise guidance for the movement of the connecting block 605, making the connecting block 605 only able to move along the direction of the limiting groove 608, further improving the movement accuracy and stability of the clamping mechanism 6.

[0024] Furthermore, two sets of limiting plates 607 are provided. A plurality of anti-sliding blocks 611 are arranged at equal intervals on one side surface of the clamping block 610. With the arrangement of the anti-sliding blocks 611, during use, a plurality of anti-sliding blocks 611 are arranged at equal intervals on one side surface of the clamping block 610, increasing the friction between the clamping block 610 and the battery stack 504 to be measured. When the clamping block 610 clamps the battery stack 504 to be measured, the anti-sliding blocks 611 can effectively prevent the battery stack 504 to be measured from sliding between the clamping blocks 610, ensuring the firmness of the clamping.

[0025] Further, the positioning mechanism 5 includes a positioning block 501, a positioning groove 502, a sealing ring 503, a fuel cell stack to be tested 504, an intake pipe 505, and an exhaust pipe 506. The inner surface of the placement box 4 is fixedly connected with the positioning block 501. The inner surface of the positioning block 501 is provided with the positioning groove 502. The upper surface of the positioning groove 502 is fixedly connected with the sealing ring 503. The surface of the sealing ring 503 is snap-connected with the fuel cell stack to be tested 504. One side surface of the positioning block 501 is fixedly connected with the intake pipe 505. One side surface of the positioning block 501 is fixedly connected with the exhaust pipe 506. Through the settings of the positioning block 501, the positioning groove 502, the sealing ring 503, the fuel cell stack to be tested 504, the intake pipe 505, and the exhaust pipe 506, during use, when performing the airtightness detection of the fuel cell stack, first place the fuel cell stack to be tested 504 into the positioning groove 502. At this time, the sealing ring 503 is tightly snap-connected with the fuel cell stack to be tested 504 to form a sealed environment. Then, a specific detection gas is filled into the fuel cell stack to be tested 504 through the intake pipe 505. As the detection gas is filled, the internal pressure of the fuel cell stack to be tested 504 gradually increases. If there is an airtightness problem with the fuel cell stack to be tested 504, the detection gas will leak out from the leakage point. If there is no leakage in the fuel cell stack to be tested 504, the gas in the fuel cell stack to be tested 504 can be discharged from the exhaust pipe 506. Through the coordinated action of each component of the positioning mechanism 5, a stable sealed environment is provided for the fuel cell stack to be tested 504, making the accuracy of the detection result and the detection efficiency higher.

[0026] Furthermore, the lifting mechanism 7 includes a fixed rod 701, a stabilizing plate 702, a cylinder 703, a telescopic rod 704, a lifting plate 705, a stabilizing rod 706, and an induction pressing plate 707. The upper surface of the placement plate 1 is fixedly connected to the fixed rod 701. One end surface of the fixed rod 701 is fixedly connected to the stabilizing plate 702. The upper surface of the stabilizing plate 702 is fixedly connected to the cylinder 703. One end surface of the cylinder 703 is fixedly connected to the telescopic rod 704. One end surface of the telescopic rod 704 is fixedly connected to the lifting plate 705. The lower surface of the lifting plate 705 is fixedly connected to the stabilizing rod 706. One end surface of the stabilizing rod 706 is fixedly connected to the induction pressing plate 707. Through the arrangement of the fixed rod 701, the stabilizing plate 702, the cylinder 703, the telescopic rod 704, the lifting plate 705, the stabilizing rod 706, and the induction pressing plate 707, during use, when it is necessary to perform a pressing operation on the battery stack 504 to be tested placed in the positioning mechanism 5, the cylinder 703 starts to work. The thrust generated by the cylinder 703 acts on the telescopic rod 704, causing the telescopic rod 704 to extend outwards. Since one end surface of the telescopic rod 704 is fixedly connected to the lifting plate 705, the extension movement of the telescopic rod 704 drives the lifting plate 705 to move downwards. The stabilizing rod 706 fixedly connected to the lower surface of the lifting plate 705 descends together with the lifting plate 705. And one end surface of the stabilizing rod 706 is fixedly connected to the induction pressing plate 707. Therefore, the induction pressing plate 707 also approaches the battery stack 504 to be tested. Finally, the induction pressing plate 707 presses on the battery stack 504 to be tested, realizing the pressing operation on the battery stack 504 to be tested. When it is necessary to loosen the battery stack 504 to be tested, the cylinder 703 works in the reverse direction, causing the telescopic rod 704 to retract. The retraction of the telescopic rod 704 drives the lifting plate 705 to rise, and then drives the induction pressing plate 707 to leave the battery stack 504 to be tested through the stabilizing rod 706. The induction function on the induction pressing plate 707 can monitor the pressure applied to the battery stack 504 to be tested in real time, avoiding damage to the battery stack 504 to be tested due to excessive pressure. The automated design of the lifting mechanism 7 can quickly fix and press the battery stack 504 to be tested, improving the detection efficiency.

[0027] Furthermore, multiple groups of fixed rods 701 are provided at the four corners of the stabilizing plate 702. The lifting plate 705 and the telescopic rod 704 form a lifting structure through the cylinder 703. Through the arrangement of the fixed rod 701, during use, multiple groups of fixed rods 701 are provided at the four corners of the stabilizing plate 702, which can provide more stable support for the stabilizing plate 702, preventing the stabilizing plate 702 from tilting, shaking, or deforming, thereby improving the stability of the entire lifting mechanism 7.

[0028] Working principle: When performing the airtightness detection of the stack, first place the stack 504 to be tested into the positioning groove 502. At this time, the sealing ring 503 is tightly engaged with the stack 504 to be tested, forming a sealed environment. Then, start the motor 602 to drive the threaded rod 603 to rotate. Since the threaded rod 603 is threadedly connected to the connecting plate 604, under the rotational action of the threaded rod 603, the connecting plate 604 begins to move along the axial direction of the threaded rod 603. As the connecting plate 604 moves, the connecting block 605 and the limiting block 606 fixed thereto also move accordingly. The limiting block 606 slides within the limiting groove 608 of the limiting plate 607, ensuring that the moving direction of the connecting plate 604 is stable without deviation or rotation. The movement of the connecting plate 604 drives the clamping block 610 to approach the stack 504 to be tested. Eventually, the clamping block 610 clamps the stack 504 to be tested. The anti-slip block 611 on one side surface of the clamping block 610 increases the friction force with the stack 504 to be tested, preventing the stack 504 to be tested from sliding during the clamping process. When it is necessary to release the stack 504 to be tested, the motor 602 rotates in the reverse direction, driving the threaded rod 603 to rotate in the opposite direction, thereby causing the connecting plate 604 to move in the opposite direction, and the clamping block 610 releases the stack 504 to be tested. Through the setting of the clamping mechanism 6, the stack 504 to be tested can be stably fixed, so that the position of the stack 504 to be tested is stable during the detection process, thereby improving the detection accuracy. Then, when it is necessary to perform a pressing operation on the stack 504 to be tested placed in the positioning mechanism 5, the cylinder 703 starts to work. The thrust generated by the cylinder 703 acts on the telescopic rod 704, causing the telescopic rod 704 to extend outward. Since one end surface of the telescopic rod 704 is fixedly connected to the lifting plate 705, the extension movement of the telescopic rod 704 drives the lifting plate 705 to move downward. The stabilizing rod 706 fixedly connected to the lower surface of the lifting plate 705 descends together with the lifting plate 705. And one end surface of the stabilizing rod 706 is fixedly connected to the induction pressing plate 707. Therefore, the induction pressing plate 707 also approaches the stack 504 to be tested. Eventually, the induction pressing plate 707 presses on the stack 504 to be tested, realizing the pressing operation on the stack 504 to be tested. When it is necessary to release the stack 504 to be tested, the cylinder 703 works in the reverse direction, causing the telescopic rod 704 to retract. The retraction of the telescopic rod 704 drives the lifting plate 705 to rise, and then drives the induction pressing plate 707 to leave the stack 504 to be tested through the stabilizing rod 706. The induction function on the induction pressing plate 707 can monitor the pressure applied to the stack 504 in real time, avoiding damage to the stack 504 to be tested due to excessive pressure. The automated design of the lifting mechanism 7 can quickly fix and press the stack 504 to be tested, improving the detection efficiency. Finally, a specific detection gas is filled into the stack 504 to be tested through the air inlet pipe 505. As the detection gas is filled, the internal pressure of the stack 504 to be tested gradually increases. If there is an airtightness problem with the stack 504 to be tested, the detection gas will leak out from the leakage point. If there is no leakage in the stack 504 to be tested, the gas in the stack 504 to be tested can be discharged from the air outlet pipe 506.The positioning mechanism 5 provides a stable sealing environment for the fuel cell stack 504 to be measured through the coordinated action of various components, making the accuracy and detection efficiency of the detection results higher. The model of the motor 602 is YE2-132S-4, and the model of the cylinder 703 is CP96SDB63-200C.,

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-tightness detection device for a fuel cell stack, comprising a placement plate (1), characterized in that: The lower surface of the placement plate (1) is fixedly connected to a control panel (2), the lower surface of the placement plate (1) is fixedly connected to a bracket (3), the upper surface of the placement plate (1) is fixedly connected to a placement box (4), the inner surface of the placement box (4) is provided with a positioning mechanism (5), the upper surface of the placement box (4) is provided with a clamping mechanism (6), and the upper surface of the placement plate (1) is provided with a lifting mechanism (7); The clamping mechanism (6) comprises a fixed block (601), a motor (602), a threaded rod (603), a connecting plate (604), a connecting block (605), a limiting block (606), a limiting plate (607), a limiting groove (608), a fixed plate (609), a clamping block (610) and an anti-sliding block (611); the upper surface of the placement box (4) is fixedly connected to the fixed block (601); one end surface of the fixed block (601) is fixedly connected to the motor (602); one end surface of the motor (602) is fixedly connected to the threaded rod (603); the outer surface of the threaded rod (603) is threadedly connected to the A connecting plate (604) is provided, one side surface of the connecting plate (604) is fixedly connected to a connecting block (605), one side surface of the connecting block (605) is fixedly connected to a limiting block (606), the outer side surface of the limiting block (606) is slidably connected to a limiting plate (607), a limiting groove (608) is provided on the inner side surface of the limiting plate (607), one side surface of the limiting plate (607) is fixedly connected to a fixing plate (609), one side surface of the connecting plate (604) is fixedly connected to a clamping block (610), and one side surface of the clamping block (610) is fixedly connected to an anti-sliding block (611).

2. The gas tightness detection device for a fuel cell stack according to claim 1, characterized in that: The connecting plate (604) forms a sliding structure through the motor (602) and the threaded rod (603), and two groups of connecting blocks (605) are symmetrically arranged around the central axis of the connecting plate (604).

3. The gas tightness detection device for a fuel cell stack according to claim 1, characterized in that: The limiting blocks (606) are arranged in two groups symmetrically about the central axis of the connecting block (605), and the outer wall dimensions of the limiting blocks (606) are consistent with the inner wall dimensions of the limiting grooves (608).

4. The gas tightness detection device for a fuel cell stack according to claim 1, characterized in that: Two groups of the limiting plates (607) are provided, and a plurality of groups of the anti-sliding blocks (611) are provided at equal intervals on a surface of one side of the clamping block (610).

5. The gas tightness detection device for a fuel cell stack according to claim 1, characterized in that: The positioning mechanism (5) comprises a positioning block (501), a positioning groove (502), a sealing ring (503), a battery stack to be tested (504), an air inlet pipe (505) and an air outlet pipe (506); the inner surface of the placement box (4) is fixedly connected to the positioning block (501); the inner surface of the positioning block (501) is provided with a positioning groove (502); the upper surface of the positioning groove (502) is fixedly connected to the sealing ring (503); the surface of the sealing ring (503) is snap-connected to the battery stack to be tested (504); one side surface of the positioning block (501) is fixedly connected to the air inlet pipe (505); and one side surface of the positioning block (501) is fixedly connected to the air outlet pipe (506).

6. The gas tightness detection device for a fuel cell stack according to claim 1, characterized in that: The lifting mechanism (7) comprises a fixed rod (701), a stabilizing plate (702), a cylinder (703), a telescopic rod (704), a lifting plate (705), a stabilizing rod (706) and an induction pressure plate (707); the upper surface of the placement plate (1) is fixedly connected to the fixed rod (701); one end surface of the fixed rod (701) is fixedly connected to the stabilizing plate (702); the upper surface of the stabilizing plate (702) is fixedly connected to the cylinder (703); one end surface of the cylinder (703) is fixedly connected to the telescopic rod (704); one end surface of the telescopic rod (704) is fixedly connected to the lifting plate (705); the lower surface of the lifting plate (705) is fixedly connected to the stabilizing rod (706); and one end surface of the stabilizing rod (706) is fixedly connected to the induction pressure plate (707).

7. A fuel cell stack gas tightness detection device according to claim 6, characterized in that: The fixing rods (701) are arranged in multiple groups at the four corners of the stabilizing plate (702), and the lifting plate (705) forms a lifting structure through the cylinder (703) and the telescopic rod (704).

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