Clamping structure and clamping device

Abstract

The invention provides a clamping structure and a clamping device.The clamping structure is used for being pressed on a bipolar plate, the clamping structure comprises a clamping body, and the clamping body is used for being arranged on one side of the bipolar plate and is adjustably arranged in the direction close to or away from the bipolar plate; the pressing assembly is telescopically arranged on the clamping body, so that in the process that the clamping body presses the bipolar plate, the pressing assembly gradually retracts until the clamping body is in pressing contact with the bipolar plate, and after the pressing force on the clamping body gradually disappears, the pressing assembly gradually stretches out to push the clamping body to be separated from the bipolar plate; the problem that a sealing gasket on a bipolar plate is adhered to an upper clamping plate in the airtight test process of the bipolar plate in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell air tightness detection, and in particular to a clamping structure and a clamping device. Background Art

[0002] Fuel cells can efficiently convert the electrochemical potential of fuel into electrical energy. Among many fuel cells, hydrogen fuel cells are unique for their use of hydrogen fuel, which is not only clean and environmentally friendly, but also has excellent performance. However, to achieve the perfect operation of this technology, the airtightness of the stack is crucial. Among them, the airtightness of the bipolar plate is a key factor affecting the airtightness of the entire stack.

[0003] In the existing fuel cell bipolar plate air tightness detection technology, two methods are usually used to ensure air tightness: one is to use upper and lower clamps and sealing rings that match the shape of the bipolar plate to seal the bipolar plate; the other is to directly use upper and lower horizontal clamps to seal.

[0004] However, both methods face a common challenge: when conducting airtightness tests, the press machine will apply a pressure of up to 10kN, which will cause the sealing gasket on the bipolar plate to adhere to the upper clamping plate during the test and be difficult to separate in time, thus affecting subsequent processes. Summary of the invention

[0005] The main purpose of the present invention is to provide a clamping structure and a clamping device to solve the problem in the prior art that the sealing gasket on the bipolar plate will adhere to the upper clamping plate during the air tightness test of the bipolar plate.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a clamping structure for being pressed onto a bipolar plate, the clamping structure comprising a clamping body, the clamping body being used to be arranged on one side of the bipolar plate and being adjustably arranged in a direction close to or away from the bipolar plate; a clamping assembly, the clamping assembly being retractably arranged on the clamping body, so that in the process of the clamping body being pressed onto the bipolar plate, the clamping assembly gradually retracts until the clamping body is in pressing contact with the bipolar plate, and after the pressing force on the clamping body gradually disappears, the clamping assembly gradually extends to push the clamping body to separate from the bipolar plate.

[0007] Furthermore, the clamping assembly includes a clamping component, an adjustment cavity is arranged in the clamping body, the adjustment cavity extends to the surface of the clamping body, and the clamping component is telescopically arranged in the adjustment cavity to extend out of the adjustment cavity or retract into the adjustment cavity.

[0008] Furthermore, the clamping assembly also includes an elastic component, which is telescopically arranged in the adjusting cavity, and one end of the elastic component is connected to the clamping component to push the clamping component out of the adjusting cavity.

[0009] Furthermore, a limiting recessed hole is arranged at one end of the pressing component close to the elastic component, and one end of the elastic component is arranged in the limiting recessed hole.

[0010] Furthermore, the pressing component is a columnar body with a step structure, and the adjusting cavity is a step hole matching the step structure.

[0011] Furthermore, the clamping component includes a connecting portion and a clamping portion that are connected to each other, the connecting portion is located on the side of the clamping portion away from the bipolar plate, and the outer peripheral surface of the connecting portion protrudes from the outer peripheral surface of the clamping portion to form a first limit step between the connecting portion and the clamping portion, and a second limit step that cooperates with the limit step is provided on the regulating cavity.

[0012] Further, at least a part of the pressing portion is made of a flexible material or a metal material; or a flexible gasket is provided on the end surface of the pressing portion for pressing the bipolar plate.

[0013] Furthermore, the clamping body comprises a clamping plate, on which the clamping assembly is mounted; and a fixing plate, which is arranged on a side of the clamping plate away from the bipolar plate.

[0014] Furthermore, there are multiple pressing components, which are arranged at intervals along the circumference of the clamping body to avoid the sealing gasket on the bipolar plate and are located on the outer periphery of the sealing gasket.

[0015] According to another aspect of the present invention, a clamping device is provided, comprising a clamping structure pressed on a bipolar plate and a supporting structure supported below the bipolar plate, wherein the clamping structure is the above-mentioned clamping structure.

[0016] The technical solution of the present invention is applied. The clamping structure of the present invention is used to be pressed on the bipolar plate. The clamping structure includes a clamping body, which is used to be set on one side of the bipolar plate and can be adjusted in position along the direction close to or away from the bipolar plate; a clamping assembly, which is telescopically set on the clamping body, so that in the process of the clamping body being pressed on the bipolar plate, the clamping assembly gradually retracts until the clamping body and the bipolar plate are in press contact, and after the pressing force on the clamping body disappears, the clamping assembly gradually extends to push the clamping body to separate from the bipolar plate. In this way, the present invention is provided with a clamping body, and a retractable clamping assembly is provided in the clamping body. In the process of the clamping body pressing the bipolar plate, the clamping assembly can be gradually retracted to ensure stable contact between the bipolar plate and the clamping structure under high pressure. After the test is completed, the clamping force disappears, and the clamping assembly gradually extends out, effectively pushing the clamping body and the bipolar plate to separate, avoiding adhesion between the bipolar plate and the clamping body, and realizing automatic peeling, which effectively solves the problem in the prior art that the sealing gasket on the bipolar plate will adhere to the upper clamping plate during the air tightness test of the bipolar plate, and significantly improves production efficiency and automation level. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view showing an embodiment of a clamping structure and a clamping device according to the present invention;

[0019] Figure 2 A schematic diagram showing the overall structure of the clamping structure and the clamping device of the present invention; and

[0020] Figure 3 Shows Figure 1 A front view of the clamping structure and clamping device shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Clamping body; 20. Pressing assembly; 30. Adjusting chamber;

[0023] 210, pressing member;

[0024] 220, elastic component;

[0025] 211, connecting part;

[0026] 212, pressing part;

[0027] 110, pressing plate;

[0028] 120, fixed plate;

[0029] 310, first cavity;

[0030] 320. Second cavity. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] like Figures 1 to 3As shown, the clamping structure of the present invention is used to be pressed on the bipolar plate, and the clamping structure includes a clamping body 10, the clamping body 10 is used to be set on one side of the bipolar plate, and is adjustably set in a direction close to or away from the bipolar plate; a clamping assembly 20, the clamping assembly 20 is telescopically set on the clamping body 10, so that in the process of the clamping body 10 being pressed on the bipolar plate, the clamping assembly 20 is gradually retracted until the clamping body 10 is in pressing contact with the bipolar plate, and after the pressing force on the clamping body 10 gradually disappears, the clamping assembly 20 is gradually extended to push the clamping body 10 to separate from the bipolar plate.

[0033] It can be seen that the present invention is provided with a clamping body 10, and a retractable clamping assembly 20 is provided in the clamping body 10. In the process of the clamping body 10 clamping the bipolar plate, the clamping assembly 20 can be gradually retracted to ensure stable contact between the bipolar plate and the clamping structure under high pressure. After the detection is completed, the clamping force disappears, and the clamping assembly 20 is gradually extended, effectively pushing the clamping body 10 and the bipolar plate to separate, avoiding the adhesion between the bipolar plate and the clamping body 10, and realizing automatic peeling, which effectively solves the problem of the sealing gasket on the bipolar plate adhering to the upper clamping plate during the air tightness test of the bipolar plate in the prior art, and significantly improves the production efficiency and automation level.

[0034] Specifically, in the existing bipolar plate air tightness detection process, the clamping body 10 needs to be cleaned regularly to remove foreign matter and glue overflow, but this method can only play a mitigating role and is inefficient. The clamping assembly 20 provided in the present invention has an automatic telescopic function, which can automatically peel off the clamping body 10 from the bipolar plate, reducing manual intervention, saving costs, and ensuring the continuity of the production line.

[0035] During the pressing process, the telescopic action of the pressing assembly 20 of the present invention is flexible, and can complete the pressing and stripping process without damaging the surface of the bipolar plate, thereby avoiding the traditional stripping method that may cause scratches on the surface of the bipolar plate or deformation of the bipolar plate, thereby improving the qualified rate of the finished bipolar plates and reducing the scrap rate of the bipolar plates.

[0036] like Figure 1 As shown, the pressing assembly 20 includes a pressing component 210, an adjusting cavity 30 is provided in the clamping body 10, the adjusting cavity 30 extends to the surface of the clamping body 10, and the pressing component 210 is telescopically provided in the adjusting cavity 30 to extend out of the adjusting cavity 30 or retract into the adjusting cavity 30. This design enables the pressing component 210 to freely extend and retract in the adjusting cavity 30, and can meet the requirements that the bipolar plate is stably pressed by the pressing component 210 under different pressure conditions, and the pressing component 210 can push the clamping body 10 to separate from the bipolar plate after pressure relief.

[0037] Specifically, the adjustment cavity 30 is composed of two parts. The first part of the adjustment cavity 30 extends to the surface of the clamping body 10, and the second part is embedded in the clamping body 10; and the cross section of the former is smaller than the cross section of the latter to form a stepped hole.

[0038] like Figure 1 and Figure 3 As shown, the pressing assembly 20 further includes an elastic component 220 , which is telescopically disposed in the adjusting cavity 30 , and one end of the elastic component 220 is connected to the pressing component 210 to push the pressing component 210 out of the adjusting cavity 30 .

[0039] Optionally, the elastic component 220 is a compression spring.

[0040] Specifically, the elastic component 220 provided in the present invention can provide elastic force after the pressing force disappears, so that the pressing component 210 automatically extends from the regulating cavity 30, thereby realizing automatic peeling of the clamping body 10 and the bipolar plate.

[0041] like Figure 3 As shown, a limiting concave hole is provided at one end of the pressing component 210 close to the elastic component 220, and one end of the elastic component 220 is provided in the limiting concave hole. The elastic component 220 is limited by the cooperation between the limiting concave hole and the end of the elastic component, thereby avoiding excessive displacement of the elastic component 220 during the expansion and contraction process, and ensuring the stability and reliability of the structure.

[0042] Specifically, the pressing component 210 is a columnar body with a step structure, and the adjusting cavity 30 is a step hole matched with the step structure. The cooperation between the columnar body with the step structure and the step hole can play a positioning role for the pressing component 210, accurately control the expansion and contraction of the pressing component 210, facilitate the installation and positioning of the pressing component 210, and increase the compactness of the structure.

[0043] In one embodiment of the present invention, the pressing component 210 of the present application may also be a triangular pyramid with a stepped structure, and the adjustment cavity 30 is a stepped hole matching the shape of the triangular pyramid.

[0044] In another embodiment of the present invention, the pressing component 210 of the present application may also be a polyhedron with a stepped structure, and the adjustment cavity 30 is a stepped hole matching the shape of the polyhedron.

[0045] like Figure 3 As shown, the clamping component 210 includes a connecting portion 211 and a clamping portion 212 that are interconnected, the connecting portion 211 is located on the side of the clamping portion 212 away from the bipolar plate, and the outer peripheral surface of the connecting portion 211 protrudes from the outer peripheral surface of the clamping portion 212 so that a first limiting step is formed between the connecting portion 211 and the clamping portion 212, and a second limiting step that cooperates with the limiting step is provided on the regulating chamber 30.

[0046] like Figure 3 As shown, the regulating cavity 30 includes a first cavity 310 and a second cavity 320 which are arranged in a stepped manner, wherein the elastic component 220 is arranged in the first cavity 310, the connecting part 211 is movably arranged in the first cavity 310, and the clamping part 212 is movably arranged in the first cavity 310 and the second cavity 320.

[0047] Optionally, at least part of the pressing part 212 is made of a flexible material or a metal material; or a flexible gasket is provided on the end surface of the pressing part 212 for pressing the bipolar plate. The pressing part 212 is made of a flexible material or a flexible gasket is provided on its end surface, which can avoid damage to the surface of the bipolar plate during the pressing process. At the same time, the use of flexible materials or gaskets can adapt to the slight unevenness of the surface of the bipolar plate, improve the pressing effect, and reduce the deformation or damage of the bipolar plate caused by improper pressing.

[0048] Preferably, the part of the pressing part 212 that requires high strength and high durability can be made of metal material. The hardness and rigidity of the metal material ensure the structural stability and durability of the pressing part 212 under high pressure environment, and avoid affecting the normal operation of the equipment due to material deformation.

[0049] The clamping body 10 includes a clamping plate 110, on which the clamping assembly 20 is mounted, and a fixing plate 120, which is arranged on a side of the clamping plate 110 away from the bipolar plate. This split design makes the installation and maintenance of the clamping assembly 20 more convenient, and also facilitates the adjustment of the relative position between the clamping plate 110 and the fixing plate 120 according to different production requirements, thereby improving production flexibility.

[0050] Specifically, the clamping plate 110 is threadedly connected to the fixing plate 120, and the clamping plate 110 is arranged at one end of the clamping body 10 close to the bipolar plate. The clamping assembly 20 is arranged in the clamping plate 110, so that when the clamping body 10 is pressed on the bipolar plate, the clamping plate 110 presses the bipolar plate. After the external force disappears, the clamping plate 110 is separated from the bipolar plate under the drive of the clamping component 210.

[0051] like Figure 1 and Figure 2 As shown, there are multiple clamping assemblies 20, and the multiple clamping assemblies 20 are arranged at intervals along the circumference of the clamping body 10 to avoid the sealing gasket on the bipolar plate and are located on the periphery of the sealing gasket. When the airtightness test of the finished bipolar plate is completed, the clamping component 210 acts on the finished bipolar plate to prevent the bipolar plate from slipping or dislocating in the plane of the supporting structure below, which affects the subsequent steps.

[0052] The present invention also provides a clamping device, comprising a clamping structure pressed on the bipolar plate and a supporting structure supported below the bipolar plate, wherein the clamping structure is the above-mentioned clamping structure.

[0053] Optionally, the present invention can also be applied to an airtightness testing tool, which includes a compressor and the above-mentioned clamping device. The clamping assembly 20 used on the airtightness testing tool can ensure that the finished bipolar plate is promptly peeled off from the clamping body 10 after the airtightness test is completed, so that the overall continuous line can operate in an orderly manner to achieve automated and efficient production.

[0054] Specifically, during the process of applying pressure by the press, in order to prevent the risk of the clamping component 210 collapsing the bipolar plates, certain restrictions are placed on the size of the clamping component 210 so that the clamping component 210 can be completely retracted into the adjustment chamber 30 during the pressing process.

[0055] Specifically, the clamping structure of the present invention places the finished bipolar plate on the support structure below the airtightness testing station by the manipulator and starts the airtightness test. The working process of the clamping structure is as follows:

[0056] When performing the air tightness test, the initial state is: the elastic component 220 in the pressing assembly 20 is in an extended state, and the pressing component 210 extends out of the adjusting chamber 30; at this time, the press applies pressure to the clamping body 10, and as the clamping body 10 moves downward, the pressing portion 212 of the pressing component 210 contacts the bipolar plate, and the elastic component 220 is gradually compressed. Since the elastic component 220 is in a compressed state, the pressing portion 212 applies pressure to the finished bipolar plate, and the pressure plays a role in fixing the position of the bipolar plate;

[0057] After the air tightness test is completed, the press gradually releases the pressure. Since the elastic component 220 in the clamping assembly 20 is still in a compressed state, the clamping component 210 will continue to fix the bipolar plate. At this time, the bipolar plate is fixed on the supporting structure below to achieve the separation of the bipolar plate and the clamping body 10; as the clamping body 10 gradually moves upward, the elastic component 220 in the clamping assembly 20 gradually returns to the extended state, and the clamping component 210 gradually extends out of the adjusting chamber 30 until it returns to the initial state.

[0058] The beneficial effects brought by the present invention are as follows:

[0059] 1. The clamping structure of the present invention can automatically peel off the clamping body 10 adhered to the bipolar plate from the bipolar plate, thereby improving the qualified rate of the bipolar plate to a certain extent.

[0060] 2. The stripping process of the present invention is a flexible stripping process, which will not have adverse effects on the bipolar plate, and different specifications of elastic parts can be selected to adjust the stripping force, thereby improving the continuity of the airtightness test production line.

[0061] 3. The clamping components 20 are arranged in the circumferential direction of the clamping body 10 and are arranged at intervals, so as to fix the position of the bipolar plate and reduce the deviation of the bipolar plate caused by adhesion, so that the entire production line can flow in an orderly manner and achieve automated and efficient production.

[0062] 4. The clamping structure of the present invention has low manufacturing cost, low manufacturing difficulty, low operation and maintenance cost, and high processing efficiency and processing volume.

[0063] In summary, the above-mentioned clamping structure design solves the problem that the sealing gasket on the bipolar plate of the fuel cell will adhere to the upper clamping plate after the air tightness test by providing a retractable clamping component 210 and an elastic component 220. At the same time, by setting the clamping component 210 to a flexible material, the clamping assembly 20 is correspondingly arranged in the circumference of the clamping body 10 and arranged at intervals to uniformly compress the bipolar plate, and the split structure design of the clamping body 10, the detection efficiency of the bipolar plate is improved, the production cost is reduced, and the problem of plate crushing caused by product adhesion is reduced, which has positive significance for promoting the large-scale industrialization of fuel cell bipolar plates.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0065] The clamping structure of the present invention is used for pressing on the bipolar plate. The clamping structure includes a clamping body 10, which is used to be set on one side of the bipolar plate and can be adjusted in position along the direction close to or away from the bipolar plate; a clamping assembly 20, which is telescopically set on the clamping body 10, so that in the process of the clamping body 10 being pressed on the bipolar plate, the clamping assembly 20 gradually retracts until the clamping body 10 and the bipolar plate are in tight contact, and after the clamping force on the clamping body 10 disappears, the clamping assembly 20 gradually extends to push the clamping body 10 to separate from the bipolar plate. In this way, the present invention is provided with a clamping body 10, and a retractable clamping assembly 20 is provided in the clamping body 10. In the process of the clamping body 10 pressing the bipolar plate, the clamping assembly 20 can be gradually retracted to ensure stable contact between the bipolar plate and the clamping structure under high pressure. After the detection is completed, the clamping force disappears, and the clamping assembly 20 gradually extends, effectively pushing the clamping body 10 to separate from the bipolar plate, avoiding adhesion between the bipolar plate and the clamping body 10, and realizing automatic peeling, which effectively solves the problem of the sealing gasket on the bipolar plate sticking to the upper clamping plate during the air tightness test of the bipolar plate in the prior art, and significantly improves the production efficiency and automation level.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0067] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0068] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0069] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0070] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamping structure, used for pressing on a bipolar plate, characterized in that: The clamping structure comprises: A clamping body (10), the clamping body (10) being used to be arranged on one side of the bipolar plate and being arranged in an adjustable position in a direction close to or away from the bipolar plate; A clamping assembly (20) is retractably arranged on the clamping body (10), so that when the clamping body (10) is pressed on the bipolar plate, the clamping assembly (20) gradually retracts until the clamping body (10) is in pressing contact with the bipolar plate, and after the pressing force on the clamping body (10) gradually disappears, the clamping assembly (20) gradually extends to push the clamping body (10) to separate from the bipolar plate.

2. The clamping structure according to claim 1, characterized in that: The pressing assembly (20) comprises: A clamping component (210), an adjusting cavity (30) is arranged in the clamping body (10), the adjusting cavity (30) extends to the surface of the clamping body (10), and the clamping component (210) is telescopically arranged in the adjusting cavity (30) to extend out of the adjusting cavity (30) or retract into the adjusting cavity (30).

3. The clamping structure according to claim 2, characterized in that: The pressing assembly (20) further comprises: An elastic component (220), wherein the elastic component (220) is telescopically arranged in the regulating cavity (30), and one end of the elastic component (220) is connected to the pressing component (210) to push the pressing component (210) out of the regulating cavity (30).

4. The clamping structure according to claim 3, characterized in that: A limiting recessed hole is provided at one end of the pressing component (210) close to the elastic component (220), and one end of the elastic component (220) is arranged in the limiting recessed hole.

5. The clamping structure according to claim 2, characterized in that: The pressing component (210) is a columnar body with a step structure, and the adjusting cavity (30) is a step hole matching the step structure.

6. The clamping structure according to claim 2, characterized in that: The clamping component (210) comprises a connecting portion (211) and a clamping portion (212) which are connected to each other, wherein the connecting portion (211) is located on a side of the clamping portion (212) away from the bipolar plate, and an outer peripheral surface of the connecting portion (211) protrudes from an outer peripheral surface of the clamping portion (212) so that a first limiting step is formed between the connecting portion (211) and the clamping portion (212), and a second limiting step which cooperates with the limiting step is provided on the regulating cavity (30).

7. The clamping structure according to claim 6, characterized in that: At least part of the pressing portion (212) is made of a flexible material or a metal material; or A flexible gasket is provided on the end surface of the pressing portion (212) for pressing the bipolar plate.

8. The clamping structure according to any one of claims 1 to 7, characterized in that: The clamping body (10) comprises: A pressing plate (110), the pressing assembly (20) being mounted on the pressing plate (110); A fixing plate (120), wherein the fixing plate (120) is arranged on a side of the pressing plate (110) away from the bipolar plate.

9. The clamping structure according to claim 2, characterized in that: The number of the clamping components (210) is plural, and the plurality of clamping components (210) are arranged at intervals along the circumference of the clamping body (10) so as to avoid the sealing gasket on the bipolar plate and be located at the periphery of the sealing gasket.

10. A clamping device, characterized in that: It comprises a clamping structure pressed on a bipolar plate and a supporting structure supported below the bipolar plate, wherein the clamping structure is the clamping structure according to any one of claims 1 to 9.

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