Press fit tool and press fit method

Abstract

The invention relates to a press-fit tool and a press-fit method.The tool is used for press-fit of a sealing element and a polar plate of a fuel cell, a sealing groove is formed in the polar plate, the sealing element is bonded with the sealing groove through an adhesive, the tool comprises a first press-fit plate, a second press-fit plate and a deformation part, the first press-fit plate is used for making contact with the sealing element, and the second press-fit plate is used for making contact with the deformation part; the second pressing plate is used for placing a polar plate, and the first pressing plate and the second pressing plate can move relatively; the deformation piece is at least arranged on the surface, facing the polar plate, of one pressing plate, the projection, facing the polar plate, of the deformation piece at least covers the sealing piece, and when the first pressing plate and the second pressing plate are close to each other, the deformation piece elastically deforms when the deformation piece makes contact with the sealing piece, so that the outer contour of the deformation piece is the same as the outer contour of the sealing piece. Compared with the prior art, the sealing element is uniformly pressed by the pressing plate, so that the reliability of connection between the sealing element and the polar plate is improved, and the sealing effect of the sealing element is improved.

Description

Technical Field

[0001] This invention belongs to the field of fuel cell technology and relates to a pressing tool and a pressing method. Background Technology

[0002] Currently, fuel cells typically have seals on their bipolar plates. These seals are bonded to the bipolar plates with adhesive and then pressed together using a pressing fixture. The seals are used to seal the gas inside the fuel cell, reducing the risk of leakage. However, during the pressing process, uneven adhesive distribution can lead to inconsistent bonding reliability between the seals and the bipolar plates. This can result in parts of the seal failing to bond properly, potentially causing seal failure and reducing the safety of the fuel cell.

[0003] Patent CN116706119A discloses a cell protection device for fuel cell stacks, including a first substrate, a second substrate, a reinforcing component, and a protective component. Multiple cell units are pressed and fixed between the first and second substrates. Each cell unit includes a graphite bipolar plate. The first and second substrates are connected by the reinforcing component. The protective component is disposed between the reinforcing component and the edge of each cell unit. The protective component includes a single-sided pressure-sensitive adhesive interlayer. The non-adhesive layer of the single-sided pressure-sensitive adhesive interlayer is fixedly connected to the side of the supporting component facing the graphite bipolar plate. The adhesive layer of the single-sided pressure-sensitive adhesive interlayer is tightly attached to the anode seal, the graphite bipolar plate, the cathode seal, and the edge of the fixing frame facing the support rod. However, this patent directly protects fuel cell stacks, mainly addressing the problem of short circuits between cell units caused by graphite particle scattering from the graphite bipolar plate. Metal plates do not have the problem of graphite particle scattering; therefore, this patent cannot solve the problem of further improving the precision of the sealing component during the manufacturing process of metal plates.

[0004] Patent CN116169316A discloses a fuel cell sealing structure, a fuel cell, and a fuel cell stack. The fuel cell sealing structure includes a sealing assembly disposed between adjacent bipolar plates of the fuel cell. The sealing assembly includes an insulating substrate with a main lip and a secondary lip on both sides. The main lip is positioned relative to the secondary lip near the membrane electrode assembly (MEA) of the fuel cell, and the height of one side of the main lip is less than the height of one side of the secondary lip. However, this patent primarily relies on bonding and assembling the sealing components on the MEA to achieve a pressure seal between the MEA and the graphite plates. The patent proposes a sealing assembly structure under this assembly relationship but does not demonstrate how to ensure precise positioning and sufficient adhesion between the sealing assembly and the MEA during the bonding process.

[0005] Patent CN101834282A discloses a fuel cell half-cell assembly and its manufacturing method. One side of the cathode plate of the half-cell assembly has an air flow field and an air flow field sealing groove, with an air seal forming a first molecular bonding force sealing layer within the air flow field sealing groove. The other side has a water flow field and a water flow field sealing groove, with a water flow field seal formed within the water flow field sealing groove. After bonding one side of the anode plate and cathode plate together and curing, a second molecular bonding force sealing layer is formed on one side of the anode plate and cathode plate. One side of the anode plate has a hydrogen flow field and a hydrogen flow field sealing groove, with a hydrogen flow field seal formed within the hydrogen flow field sealing groove, forming a third molecular bonding force sealing layer. A membrane electrode assembly (MEA) is placed on the upper side of the anode plate or cathode plate, with a third molecular bonding force sealing layer between the MEA and the anode plate, and a first molecular bonding force sealing layer between the MEA and the cathode plate. However, the sealing molding method used in this patent is high-temperature curing. Its advantage is that it can be precisely positioned and molded according to the shape of the tooling or mold. However, high-temperature curing molding requires a longer production time, which will affect the production cycle of the electrode plate or battery cell. Moreover, the high-temperature curing manufacturing process involved in this patent is more suitable for graphite electrode plates. For metal electrode plates, high-temperature curing adhesive sealing can easily damage the performance of the product coating. In addition, this patent does not involve the implementation of metal electrode plates. Summary of the Invention

[0006] The purpose of this invention is to overcome at least one of the defects in the prior art by providing a pressing fixture and pressing method. In this invention, the pressing plate uniformly presses the sealing element, which helps to improve the reliability of the connection between the sealing element and the electrode plate, thereby improving the sealing effect of the sealing element.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] One of the technical solutions of the present invention is to provide a pressing tool for pressing a sealing element and a fuel cell electrode plate. The electrode plate has a sealing groove, and the sealing element is bonded to the sealing groove by an adhesive. The tool includes a first pressing plate, a second pressing plate, and a deformable element. The first pressing plate is used to contact the sealing element, and the second pressing plate is used to place the electrode plate. The first pressing plate and the second pressing plate can move relative to each other.

[0009] The deformable element is disposed on at least one of the pressing plates facing the electrode plate, and the projection of the deformable element toward the electrode plate at least covers the seal. When the first pressing plate and the second pressing plate approach each other, the deformable element can elastically deform when it comes into contact with the seal, so that the outer contour of the deformable element can be the same as the outer contour of the seal.

[0010] Furthermore, a sealing element is provided on one side of the electrode plate, or sealing elements are provided symmetrically or asymmetrically on both sides;

[0011] When a first seal is provided on one side of the electrode plate, the tooling is used to press the first seal and the electrode plate of the fuel cell together. A first sealing groove is provided on the electrode plate. The first seal is bonded to the first sealing groove by an adhesive. The first pressing plate is used to contact the first seal.

[0012] The deformable member is disposed on the surface of the first pressing plate facing the electrode plate. The projection of the deformable member toward the electrode plate at least covers the first sealing member. When the first pressing plate and the second pressing plate approach each other, the deformable member can elastically deform when it contacts the first sealing member so that the outer contour of the deformable member can be the same as the outer contour of the first sealing member.

[0013] When a first sealing element and a second sealing element are provided on both sides of the electrode plate, the tooling is also used to press the second sealing element. The electrode plate is also provided with a second sealing groove on the side opposite to the first sealing groove. The second sealing element is bonded to the second sealing groove by an adhesive. The second pressing plate is used to place the electrode plate and to contact the second sealing element.

[0014] The deformable member is also disposed on the surface of the second pressing plate facing the electrode plate. The projections of the deformable members on both sides facing the electrode plate at least cover the first seal and the second seal, respectively. When the first pressing plate and the second pressing plate approach each other, the deformable member can elastically deform when it contacts the first seal or the second seal, so that the outer contour of the deformable member can be the same as the outer contour of the first seal or the second seal.

[0015] Furthermore, a channel is provided inside the pressing plate, and an air inlet is provided on the pressing plate. The channel is connected to the air inlet and the air outlet. The air outlet is located on the surface of the pressing plate facing the electrode plate, and the deformable part covers the air outlet.

[0016] As a preferred technical solution, an air inlet is provided on the side of the pressing plate.

[0017] As a preferred technical solution, the projection intervals of the air outlets toward the deformable part are distributed on the deformable part;

[0018] Alternatively, the projection of the air outlet toward the deformable part completely covers the deformable part, that is, the path of the air outlet arrangement is the same as the shape of the deformable part.

[0019] Furthermore, when the tooling is ventilated on one side, a first channel is provided in the first pressing plate, a first air inlet is provided on the first pressing plate, the first channel is connected to the first air inlet and the first air outlet, the first air outlet is opened on the surface of the first pressing plate facing the electrode plate, and the deformable part on one side of the first pressing plate covers the first air outlet.

[0020] When the tooling is ventilated on both sides, in addition to the first channel in the first pressing plate, a second channel is opened in the second pressing plate. A second air inlet is provided on the second pressing plate. The second channel is connected to the second air inlet and the second air outlet. The second air outlet is opened on the surface of the second pressing plate facing the electrode plate. A deformable part on one side of the second pressing plate covers the second air outlet.

[0021] Furthermore, the projection of the deformable member toward the electrode plate covers the seal, or covers both the seal and the electrode plate.

[0022] Furthermore, when the projection of the deformable part toward the electrode plate covers the seal and the electrode plate, the deformable part includes a connecting part and a deformable part that are connected to each other, the projection of the deformable part toward the electrode plate covers the seal, and the projection of the connecting part toward the electrode plate does not cover the seal.

[0023] The tooling also includes a fixing member, which is disposed on the side of the pressing plate facing the electrode plate. The connecting part is located between the fixing member and the pressing plate and is fixedly connected to the fixing member and the pressing plate. The fixing member is used to limit the deformation of the connecting part of the deformable part.

[0024] Furthermore, when the projection of the deformable part on one side of the first pressing plate toward the electrode plate covers the first seal and the electrode plate, the deformable part includes a first connecting part and a first deformable part that are connected to each other. The projection of the first deformable part toward the electrode plate covers the first seal, while the projection of the first connecting part toward the electrode plate does not cover the first seal.

[0025] The tooling also includes a first fixing member, which is disposed on the side of the first pressing plate facing the electrode plate. The first connecting part is located between the first fixing member and the first pressing plate and is fixedly connected to the first fixing member and the first pressing plate. The first fixing member is used to limit the deformation of the first connecting part of the deformable part on one side of the first pressing plate.

[0026] When the projection of the deformable part on one side of the second pressing plate toward the electrode plate covers the second seal and the electrode plate, the deformable part includes a second connecting part and a second deformable part that are connected to each other. The projection of the second deformable part toward the electrode plate covers the second seal, and the projection of the second connecting part toward the electrode plate does not cover the second seal.

[0027] The tooling also includes a second fixing member, which is disposed on the side of the second pressing plate facing the electrode plate. The second connecting part is located between the second fixing member and the second pressing plate and is fixedly connected to the second fixing member and the second pressing plate. The second fixing member is used to limit the deformation of the second connecting part of the deformable part on one side of the second pressing plate.

[0028] Furthermore, along the width direction of the tooling, the following condition must be met: 0.02 mm ≤ width dimension of the deformed part of the deformable component - width dimension of the seal ≤ 0.13 mm;

[0029] When the dimensional difference is too small, the deformed portion of the deformed part cannot completely cover the seal, and even the projection of the undeformed part cannot completely cover the seal. This results in the seal's entire structure not being uniformly pressed by the tooling, increasing the risk that the adhesive cannot be evenly dispersed. When the dimensional difference is too large, because the deformed portion of the deformed part is larger than the seal's size along the tooling width, wrinkles are likely to appear when the deformed portion of the deformed part is fitted to the seal. This increases the risk that the deformed part cannot fit tightly against the seal, and consequently, the seal's entire structure still cannot be uniformly pressed by the tooling, which is detrimental to adhesive dispersion. Therefore, when the dimensional difference is 0.02 mm ≤ dimensional difference ≤ 0.13 mm, the deformed portion of the deformed part is of moderate size compared to the seal along the tooling width, reducing the risk that the deformed portion of the deformed part cannot fit tightly against and completely cover the seal after deformation, thereby reducing the possibility that the adhesive cannot be evenly dispersed.

[0030] As a preferred technical solution, when the projection of the deformable part toward the electrode plate covers the sealing part, the deformed part of the deformable part is the deformable part itself;

[0031] Alternatively, when the projection of the deformable part toward the electrode plate covers the seal and the electrode plate, the deformed portion of the deformable part is the portion not restricted by the fixing element.

[0032] One of the technical solutions of the present invention is to provide a pressing method, which uses the aforementioned tooling to press the seal and the electrode plate of the fuel cell together, the method comprising the following steps:

[0033] S1. Place the electrode plate on the second pressing plate. The sealing groove of the electrode plate is coated with adhesive. The sealing element and the sealing groove are pre-fixed with adhesive.

[0034] S2. Control the first and second pressing plates to move closer to each other so that the deformed part contacts the sealing part;

[0035] S3. Control the deformation of the deformable part by venting or applying mechanical pressure so that the outer contour of the deformable part facing the electrode plate matches the outer contour of the seal facing the pressing plate.

[0036] Furthermore, when seals are provided on both sides of the electrode plate, the seals on both sides are deformed twice successively or simultaneously on both sides.

[0037] During the two deformations, after the first seal on one side of the first pressing plate deforms, it controls the first pressing plate and the second pressing plate to move away from each other.

[0038] Flip the electrode plate so that the side of the electrode plate with the second sealing element faces the first pressing plate;

[0039] The first and second pressing plates are controlled to move closer to each other so that the deformable part on one side of the first pressing plate comes into contact with the second sealing element;

[0040] Control the deformation of the deformable part so that the outer contour of the deformable part facing the electrode plate matches the outer contour of the second seal facing the first pressing plate;

[0041] When deforming on both sides simultaneously, the deformation of the deformable parts on both sides is controlled at the same time so that the outer contour of the deformable part facing the electrode plate matches the outer contour of the seal facing the pressing plate.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] (1) In this invention, a deformable element is provided between the pressing plate and the sealing element. When the first pressing plate and the second pressing plate approach each other, the pressing plate first contacts the higher part of the sealing element through the deformable element. As the first pressing plate and the second pressing plate continue to approach each other, the deformable element elastically deforms and contacts the lower part of the sealing element. At this time, the surface of the sealing element facing the pressing plate is completely fitted by the deformable element after elastic deformation, that is, the outer contour of the deformable element facing the electrode plate can be the same as the outer contour of the sealing element facing the pressing plate. Then, as the first pressing plate and the second pressing plate continue to approach each other, the pressing plate uniformly presses the sealing element through the deformable element that is in contact with each position of the sealing element. The pressing tool of this invention ensures that the compressive stress on the higher and lower parts of the seal is the same, thereby improving the uniformity of stress at the interface between the seal and the adhesive. This allows the adhesive located on the lower side of the seal to be well dispersed, meaning the adhesive can be evenly dispersed throughout the entire bottom of the seal. This, in turn, improves the reliability of the connection between the seal and the electrode plate, thus enhancing the sealing effect. When the electrode plate is used as a bipolar plate in a fuel cell, pressing with the tooling of this invention improves the sealing performance of the seal in the fuel cell, reduces the risk of leakage of gaseous reaction products in the fuel cell, and thus enhances the safety of fuel cell operation.

[0044] (2) In this invention, sealing elements can be used on both sides of the electrode plate. When the electrode plate is used as a bipolar plate of the fuel cell, a first sealing element and a second sealing element are respectively provided on both sides of the electrode plate, which can further reduce the risk of leakage of gas reaction products in the fuel cell, thereby improving the safety of fuel cell use.

[0045] (3) In this invention, the deformation of the deformable part is caused by ventilation. When the pressing plate comes into contact with the sealing part, ventilation begins to be introduced into the inlet. The gas flows into the outlet through the channel, and then the gas can flow into the space between the pressing plate and the deformable part through the outlet. As the amount of gas flowing in gradually increases, the air pressure between the deformable part and the pressing plate increases. The deformable part deforms under the action of air pressure. Then, the deformable part can completely fit the surface of the sealing part facing the pressing plate under the action of air pressure. That is, at this time, the outer contour of the deformable part facing the electrode plate is the same as the outer contour of the sealing part facing the pressing plate. Therefore, by setting the channel and the inlet and outlet connected to the channel, the deformation of the deformable part can be controlled, which is beneficial to improving the reliability of the deformable part. At the same time, the deformation of the deformable part is caused by ventilation, instead of the deformation of the deformable part caused by the relative movement of the pressing plate driven by the outside, which is beneficial to reducing the energy consumption of the pressing tool during operation.

[0046] (4) In this invention, a fixing member can be provided on the side of the pressing plate facing the electrode plate. When the pressing plate contacts the part of the sealing member that is in a higher position, air is vented into the pressing plate, and the deformed part of the deformable part deforms. At this time, the outer contour of the deformed part facing the electrode plate can be the same as the outer contour of the sealing member facing the pressing plate. The connecting part is fixedly connected to the pressing plate through the fixing member, so that the connecting part will not deform, which is beneficial to improving the reliability of the pressing tooling. At the same time, the fixing member can shape the deformed part into the same shape as the sealing member, so that the deformable part can completely cover the sealing member. In addition, the deformable part does not need to be specially cut to a size similar to the sealing member, which is beneficial to reducing the processing steps of the deformable part and facilitating production. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the existing pressing tooling when the adhesive is not completely dispersed.

[0048] Figure 2 This is a schematic diagram of the fit between the first sealing element and the first sealing groove in the prior art when the adhesive is not completely dispersed;

[0049] Figure 3 This is a schematic diagram of the pressing tool in Embodiment 1 of the present invention when the adhesive is not completely dispersed and the deformed part is deformed.

[0050] Figure 4 This is a schematic diagram of the pressing tool in Embodiment 2 of the present invention when the adhesive is not completely dispersed and the deformed part is deformed.

[0051] Figure 5 This is a schematic diagram of the structure of the first pressing plate in Embodiment 1 of the present invention;

[0052] Figure 6This is a schematic diagram of the fit between the first sealing element and the first sealing groove in embodiments 2 and 3 of the present invention when the adhesive is completely dispersed;

[0053] Figure 7 This is a schematic diagram of the fit between the first pressing plate and the deformable part in Embodiment 2 of the present invention when the deformable part has not undergone deformation;

[0054] Figure 8 This is a schematic diagram of the pressing tool in Embodiment 3 of the present invention when the adhesive is not completely dispersed and the deformed part is deformed.

[0055] Figure 9 This is a schematic diagram of the fit between the first pressing plate and the deformable part in Embodiment 3 of the present invention when the deformable part has not undergone deformation;

[0056] Figure 10 This is a schematic diagram of the structure of the pressing tool in Embodiment 4 of the present invention when the adhesive on the side near the first pressing plate is not completely dispersed, the adhesive on the side near the second pressing plate is completely dispersed, and the deformable part deforms.

[0057] Figure 11 This is a schematic diagram of the pressing tool in Embodiment 5 of the present invention when the adhesive is not completely dispersed and the deformed part is deformed.

[0058] Figure 12 This is a schematic diagram showing the fit between the first sealing element and the first sealing groove, and the second sealing element and the second sealing groove in embodiments 4 and 5 of the present invention, when the adhesive is completely dispersed.

[0059] Figure 13 This is a schematic diagram of the fit between the second pressing plate and the deformable part in Embodiment 5 of the present invention when the deformable part has not undergone deformation;

[0060] Figure 14 This is a schematic diagram of the fit between the second pressing plate and the deformable part in Embodiment 4 of the present invention when the deformable part has not undergone deformation;

[0061] Figure 15 This is a schematic diagram of the structure of the pressing tool in Embodiment 6 of the present invention when the adhesive on the side near the first pressing plate is not completely dispersed, the adhesive on the side near the second pressing plate is completely dispersed, and the deformable part deforms.

[0062] Figure 16 This is a schematic flowchart of the pressing method in Embodiment 7 of the present invention;

[0063] Figure 17 This is a schematic flowchart of the pressing method in Embodiment 8 of the present invention;

[0064] Figure 18 This is a schematic flowchart of the pressing method in Embodiment 9 of the present invention;

[0065] Figure 19 This is a schematic diagram of the pressing method in Embodiment 10 of the present invention.

[0066] Explanation of markings in the diagram:

[0067] 11—First pressing plate, 111—First channel, 112—First air inlet, 113—First air outlet;

[0068] 12—Second pressing plate, 121—Second channel, 122—Second air inlet, 123—Second air outlet;

[0069] 13—Deformable part, 131—First connecting part, 132—First deformable part, 133—Second connecting part, 134—Second deformable part;

[0070] 14—First fastener, 15—Second fastener;

[0071] 2—Electrode plate, 21—First seal, 22—First sealing groove, 23—Second seal, 24—Second sealing groove;

[0072] 3—Adhesive. Detailed Implementation

[0073] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0074] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and do not imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.

[0075] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0076] A type of pressing tool, such as Figure 1 and Figure 2 As shown, it typically includes a first pressing plate 11 and a second pressing plate 12;

[0077] A first seal 21 is typically installed on the electrode plate 2 of the fuel cell. The first seal 21 is used to seal the gaseous reaction products inside the fuel cell to reduce the risk of gas leakage.

[0078] The electrode plate 2 is usually provided with a first sealing groove 22. The first sealing groove 22 is used to install the first sealing element 21. During the process of installing the first sealing element 21 onto the electrode plate 2, the first sealing element 21 is bonded to the first sealing groove 22 by adhesive 3. Then, the first sealing element 21 and the electrode plate 2 are pressed together by the first pressing plate 11 and the second pressing plate 12 so that the adhesive 3 located between the electrode plate 2 and the first sealing element 21 can be dispersed.

[0079] However, during the pressing process, due to the poor consistency of the structural thickness of the first sealing element 21, that is, the surface of the first sealing element 21 facing the pressing tool is uneven.

[0080] The higher portion of the first seal 21 first contacts the pressure plate, thereby allowing the adhesive 3 located on the lower side of the higher portion of the first seal 21 (i.e., the portion closer to the first pressure plate 11) to be well dispersed.

[0081] The lower portion of the first seal 21 (i.e., the portion further away from the first pressing plate 11) is at risk of receiving less pressing force from the pressing plate, or even failing to contact and press with the pressing plate. This could cause the adhesive 3 on the lower side of the lower portion of the first seal 21 to not be well dispersed, resulting in uneven stress at the interface between the first seal 21 and the adhesive 3. Consequently, the adhesion between the portion of the first seal 21 and the electrode plate 2 may be poor, posing a risk of seal failure of the first seal 21 and reducing the safety of fuel cell use.

[0082] Example 1:

[0083] A type of pressing tool, such as Figure 3As shown, the first sealing member 21 and the electrode plate 2 of the fuel cell are pressed together. The electrode plate 2 has a first sealing groove 22. The first sealing member 21 is bonded to the first sealing groove 22 by adhesive 3. The pressing tooling includes a first pressing plate 11, a second pressing plate 12 and a deformable member 13. The first pressing plate 11 is used to contact the first sealing member 21, and the second pressing plate 12 is used to place the electrode plate 2. The first pressing plate 11 and the second pressing plate 12 can move relative to each other.

[0084] The deformable part 13 is disposed on the surface of the first pressing plate 11 facing the electrode plate 2. The projection of the deformable part 13 facing the electrode plate 2 covers the first sealing member 21 and the electrode plate 2. When the first pressing plate 11 and the second pressing plate 12 approach each other, the deformable part 13 can elastically deform when it contacts the first sealing member 21, so that the outer contour of the deformable part 13 can be the same as the outer contour of the first sealing member 21.

[0085] When the first pressing plate 11 and the second pressing plate 12 approach each other, the first pressing plate 11 first contacts the higher part of the first sealing member 21 through the deformable member 13. As the first pressing plate 11 and the second pressing plate 12 continue to approach each other, the deformable member 13 elastically deforms and contacts the lower part of the first sealing member 21. At this time, the surface of the first sealing member 21 facing the first pressing plate 11 is completely fitted by the elastically deformed deformable member 13, that is, the outer contour of the deformable member 13 facing the electrode plate 2 can be the same as the outer contour of the first sealing member 21 facing the first pressing plate 11. Then, as the first pressing plate 11 and the second pressing plate 12 continue to approach each other... During the approach process, the first pressing plate 11 uniformly presses the first sealing member 21 with the deformable member 13, which is in contact with each position of the first sealing member 21, so that the compressive stress on the higher and lower positions of the first sealing member 21 is the same, thereby improving the uniformity of stress on the interface between the first sealing member 21 and the adhesive 3. This allows the adhesive 3 located on the lower side of the lower position of the first sealing member 21 to be well dispersed, that is, the adhesive 3 can be evenly dispersed on the entire bottom of the first sealing member 21, which in turn helps to improve the reliability of the connection between the first sealing member 21 and the electrode plate 2, thereby improving the sealing effect of the first sealing member 21.

[0086] When the electrode plate 2 is used as the bipolar plate of the fuel cell, the pressing tool of this embodiment can help improve the sealing performance of the first sealing member 21 for the fuel cell, reduce the risk of leakage of gaseous reaction products in the fuel cell, and thus help improve the safety of the fuel cell.

[0087] The first pressing plate 11 has a first channel 111 inside, and a first air inlet 112 is provided on the side of the first pressing plate 11. The first channel 111 is connected to the first air inlet 112 and the first air outlet 113. The first air outlet 113 is opened on the surface of the first pressing plate 11 facing the electrode plate 2, and the deformable part 13 covers the first air outlet 113.

[0088] When the first pressing plate 11 contacts the first sealing element 21, air begins to flow into the first air inlet 112. The gas flows into the first air outlet 113 through the first channel 111, and then flows into the space between the first pressing plate 11 and the deformable part 13 through the first air outlet 113. As the amount of gas flowing in gradually increases, the air pressure between the deformable part 13 and the first pressing plate 11 increases. Under the action of air pressure, the deformable part 13 deforms, and under the action of air pressure, the deformable part 13 can completely fit against the surface of the first sealing element 21 facing the first pressing plate 11. The outer contour of the deformable part 13 facing the electrode plate 2 is the same as the outer contour of the first seal 21 facing the first pressing plate 11. Therefore, by setting the first channel 111 and the first air inlet 112 and the first air outlet 113 connected to the first channel 111, the deformation of the deformable part 13 can be controlled, which helps to improve the reliability of the operation of the deformable part 13. At the same time, the deformation of the deformable part 13 is caused by ventilation, instead of the deformation of the deformable part 13 being caused by the relative movement of the pressing plate driven by the outside, which helps to reduce the energy consumption of the pressing tooling during operation.

[0089] like Figure 5 As shown, the projection of the first air outlet 113 toward the deformable part 13 is distributed at intervals on the deformable part 13.

[0090] Alternatively, in an alternative implementation, the projection of the first air outlet 113 toward the deformable member 13 completely covers the deformable member 13, that is, the path of the first air outlet 113 is the same as the shape of the deformable member 13.

[0091] Example 2:

[0092] A type of pressing tool, such as Figure 4 As shown, it is basically the same as in Embodiment 1, except that the dimensions of the deformed part 13 are different. The specific differences are as follows:

[0093] The projection of the deformable part 13 toward the electrode plate 2 covers the first seal 21. After the deformable part 13 deforms, it can completely cover the first seal 21, reducing the risk that part of the structure of the first seal 21 cannot be pressed by the deformable part 13, and further reducing the risk that the adhesive 3 cannot be evenly and completely dispersed on the entire bottom of the first seal 21, thereby improving the reliability of the connection between the first seal 21 and the electrode plate 2.

[0094] like Figure 6 and Figure 7 As shown, along the width direction of the pressing tool, the width dimension of the first sealing member 21 is L1, and the width dimension of the deformable member 13 is L2, satisfying 0.02 mm ≤ L2 - L1 ≤ 0.13 mm. In this embodiment, L2 - L1 can be any one of 0.02 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.08 mm, 0.10 mm, 0.12 mm, and 0.13 mm.

[0095] When L2-L1 is too small, the deformed portion of the deformed part 13 cannot completely cover the first seal 21, and even the projection of the undeformed part 13 cannot completely cover the first seal 21. This results in the entire structure of the first seal 21 not being uniformly pressed by the pressing fixture, increasing the risk that the adhesive 3 cannot be uniformly dispersed. When L2-L1 is too large, since the dimension of the deformed portion of the deformed part 13 along the width direction of the pressing fixture is larger than the dimension of the first seal 21, the deformed portion of the deformed part 13 is prone to wrinkles when it is attached to the first seal 21. This increases the risk that the deformed part 13 cannot be tightly attached to the first seal 21, and consequently, the entire structure of the first seal 21 still cannot be uniformly pressed by the pressing fixture, which is not conducive to the dispersion of the adhesive 3. Therefore, when 0.02 mm ≤ L2-L1 ≤ 0.13 mm is satisfied... When the diameter is mm, the deformed part of the deformed part 13 is moderately sized compared to the first seal 21 along the width direction of the pressing tool, which reduces the risk that the deformed part of the deformed part 13 cannot adhere tightly and completely cover the first seal 21 after deformation, thereby reducing the possibility that the adhesive 3 cannot be evenly dispersed.

[0096] Example 3:

[0097] A type of pressing tool, such as Figure 8 As shown, it is basically the same as in Embodiment 1, except that the part of the deformed part 13 that does not contact the seal is supported. The specific differences are as follows:

[0098] The deformable part 13 includes a first connecting part 131 and a first deformable part 132 that are connected to each other. The projection of the first deformable part 132 toward the electrode plate 2 covers the first sealing part 21, while the projection of the first connecting part 131 toward the electrode plate 2 does not cover the first sealing part 21.

[0099] The pressing fixture also includes a first fixing member 14, which is disposed on the side of the first pressing plate 11 facing the electrode plate 2. The first connecting part 131 is located between the first fixing member 14 and the first pressing plate 11 and is fixedly connected to the first fixing member 14 and the first pressing plate 11. The first fixing member 14 is used to limit the deformation of the first connecting part 131 of the deformable part 13.

[0100] When the first pressing plate 11 contacts the higher part of the first sealing member 21, air is vented into the first pressing plate 11, and the first deformable part 132 of the deformable member 13 deforms. At this time, the outer contour of the first deformable part 132 facing the electrode plate 2 can be the same as the outer contour of the first sealing member 21 facing the first pressing plate 11. The first connecting part 131 is fixedly connected to the first pressing plate 11 through the first fixing member 14, so that the first connecting part 131 will not deform, which is beneficial to improving the reliability of the pressing tooling. At the same time, the first fixing member 14 can shape the first deformable part 132 into the same shape as the first sealing member 21, so that the deformable member 13 can completely cover the first sealing member 21. In addition, the deformable member 13 does not need to be specially cut to a size similar to the first sealing member 21, which is beneficial to reducing the processing steps of the deformable member 13 and facilitating production.

[0101] like Figure 6 and Figure 9 As shown, along the width direction of the pressing fixture, the width dimension of the first sealing member 21 is L1, and the width dimension of the first deformable part 132 (the width dimension of the first pressing plate 11 excluding the first fixing member 14) is L3, satisfying 0.02 mm ≤ L3 - L1 ≤ 0.13 mm. In this embodiment, L3 - L1 can be any one of 0.02 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.08 mm, 0.10 mm, 0.12 mm, and 0.13 mm.

[0102] When L3-L1 is too small, the deformed first deformed part 132 cannot completely cover the first seal 21, and even the projection of the undeformed first deformed part 132 cannot completely cover the first seal 21. This results in the entire structure of the first seal 21 not being uniformly pressed by the pressing tool, increasing the risk that the adhesive 3 cannot be uniformly dispersed. When L3-L1 is too large, since the dimension of the first deformed part 132 along the width direction of the pressing tool is larger than the dimension of the first seal 21, the deformed first deformed part 132 is prone to wrinkles when it is attached to the first seal 21. This increases the risk that the deformed part 132 cannot be tightly attached to the first seal 21, and consequently, the entire structure of the first seal 21 still cannot be uniformly pressed by the pressing tool, which is not conducive to the dispersion of the adhesive 3. Therefore, when 0.02 mm ≤ L3-L1 ≤ 0.13 mm is satisfied... When the size is mm, the first deformable part 132 is moderately sized compared to the first seal 21 along the width direction of the pressing tool, which reduces the risk that the first deformable part 132 cannot fit tightly and cannot completely cover the first seal 21 after deformation, thereby reducing the possibility that the adhesive 3 cannot be evenly dispersed.

[0103] Example 4:

[0104] A type of pressing tool, such as Figure 10As shown, it is basically the same as in Example 3, except that sealing elements are provided on both sides of the electrode plate 2. The specific differences are as follows:

[0105] The pressing tool is also used to press the second sealing element 23. The electrode plate 2 is also provided with a second sealing groove 24 on the side opposite to the first sealing groove 22. The second sealing element 23 is bonded to the second sealing groove 24 by adhesive 3. The second pressing plate 12 is used to place the electrode plate 2 and to contact the second sealing element 23.

[0106] The deformable member 13 is also disposed on the surface of the second pressing plate 12 facing the electrode plate 2. The projections of the deformable members 13 on both sides facing the electrode plate 2 respectively cover the first sealing member 21 and the electrode plate 2, as well as the second sealing member 23 and the electrode plate 2. When the first pressing plate 11 and the second pressing plate 12 approach each other, the deformable member 13 can elastically deform when it contacts the first sealing member 21 or the second sealing member 23, so that the outer contour of the deformable member 13 can be the same as the outer contour of the first sealing member 21 or the second sealing member 23.

[0107] When the first pressing plate 11 and the second pressing plate 12 approach each other, the process of improving the sealing effect of the second sealing element 23 is the same as that of the first sealing element 21, so it will not be described again.

[0108] When the electrode plate 2 is used as the bipolar plate of the fuel cell, the first sealing element 21 and the second sealing element 23 are respectively provided on both sides of the electrode plate 2, which can further reduce the risk of leakage of gas reaction products in the fuel cell, thereby improving the safety of fuel cell use.

[0109] The second pressing plate 12 has a second channel 121 inside, and a second air inlet 122 is provided on the side of the second pressing plate 12. The second channel 121 is connected to the second air inlet 122 and the second air outlet 123. The second air outlet 123 is opened on the surface of the second pressing plate 12 facing the electrode plate 2. The deformable part 13 on one side of the second pressing plate 12 covers the second air outlet 123.

[0110] When the second pressing plate 12 contacts the second sealing member 23, the deformation process of the deformable member 13 on one side of the second pressing plate 12 is the same as that of the deformable member 13 on one side of the first pressing plate 11, so it will not be described again.

[0111] The arrangement of the second air outlet 123 is the same as that of the first air outlet 113, so it will not be described again.

[0112] The deformable part 13 on one side of the second pressing plate 12 includes a second connecting part 133 and a second deformable part 134 that are connected to each other. The projection of the second deformable part 134 toward the electrode plate 2 covers the second sealing part 23, while the projection of the second connecting part 133 toward the electrode plate 2 does not cover the second sealing part 23.

[0113] The pressing fixture also includes a second fixing member 15, which is disposed on the side of the second pressing plate 12 facing the electrode plate 2. The second connecting part 133 is located between the second fixing member 15 and the second pressing plate 12 and is fixedly connected to the second fixing member 15 and the second pressing plate 12. The second fixing member 15 is used to limit the deformation of the second connecting part 133 of the deformable part 13 on one side of the second pressing plate 12.

[0114] When the second pressing plate 12 contacts the higher part of the second sealing member 23, the effect of the second fixing member 15 on the pressing tool is the same as that of the first fixing member 14, so it will not be described again.

[0115] Along the movement direction of the first pressing plate 11 and the second pressing plate 12, the projection of the deformable part 13 on one side of the first pressing plate 11 toward the electrode plate 2 coincides with the projection of the deformable part 13 on one side of the second pressing plate 12 toward the electrode plate 2. For the electrode plate 2, the projections of the first sealing part 21 and the second sealing part 23 on both sides of the electrode plate 2 coincide with each other, that is, the first sealing part 21 and the second sealing part 23 are symmetrically connected on both sides of the electrode plate 2. Thus, the deformable part 13 on one side of the first pressing plate 11 and the deformable part 13 on one side of the second pressing plate 12 are arranged facing each other, so that the position where the deformable part 13 deforms, that is, the projection of the deformed part toward the electrode plate 2, can completely cover the first sealing part 21 and the second sealing part 23, which is beneficial to improving the reliability and stability of the pressing tooling.

[0116] like Figure 12 and Figure 14 As shown, along the width direction of the pressing fixture, the width dimension of the second sealing member 23 is L4, and the width dimension of the second deformable part 134 (the width dimension of the second pressing plate 12 excluding the second fixing member 15) is L6, satisfying 0.02 mm ≤ L6 - L4 ≤ 0.13 mm. In this embodiment, L6 - L4 can be any one of 0.02 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.08 mm, 0.10 mm, 0.12 mm, and 0.13 mm.

[0117] When L6-L4 is too small or too large, the reason for limiting the size of the second deformed part 134 is the same as that for the first deformed part 132, so it will not be described again.

[0118] Example 5:

[0119] A type of pressing tool, such as Figure 11 As shown, it is basically the same as in Example 2, except that sealing elements are provided on both sides of the electrode plate 2. The specific differences are as follows:

[0120] The pressing tool is also used to press the second sealing element 23. The electrode plate 2 is also provided with a second sealing groove 24 on the side opposite to the first sealing groove 22. The second sealing element 23 is bonded to the second sealing groove 24 by adhesive 3. The second pressing plate 12 is used to place the electrode plate 2 and to contact the second sealing element 23.

[0121] The deformable member 13 is also disposed on the surface of the second pressing plate 12 facing the electrode plate 2. The projections of the deformable members 13 on both sides facing the electrode plate 2 respectively cover the first sealing member 21 and the electrode plate 2, as well as the second sealing member 23 and the electrode plate 2. When the first pressing plate 11 and the second pressing plate 12 approach each other, the deformable member 13 can elastically deform when it contacts the first sealing member 21 or the second sealing member 23, so that the outer contour of the deformable member 13 can be the same as the outer contour of the first sealing member 21 or the second sealing member 23.

[0122] When the first pressing plate 11 and the second pressing plate 12 approach each other, the process of improving the sealing effect of the second sealing element 23 is the same as that of the first sealing element 21, so it will not be described again.

[0123] When the electrode plate 2 is used as the bipolar plate of the fuel cell, the first sealing element 21 and the second sealing element 23 are respectively provided on both sides of the electrode plate 2, which can further reduce the risk of leakage of gas reaction products in the fuel cell, thereby improving the safety of fuel cell use.

[0124] The second pressing plate 12 has a second channel 121 inside, and a second air inlet 122 is provided on the side of the second pressing plate 12. The second channel 121 is connected to the second air inlet 122 and the second air outlet 123. The second air outlet 123 is opened on the surface of the second pressing plate 12 facing the electrode plate 2. The deformable part 13 on one side of the second pressing plate 12 covers the second air outlet 123.

[0125] When the second pressing plate 12 contacts the second sealing member 23, the deformation process of the deformable member 13 on one side of the second pressing plate 12 is the same as that of the deformable member 13 on one side of the first pressing plate 11, so it will not be described again.

[0126] The arrangement of the second air outlet 123 is the same as that of the first air outlet 113, so it will not be described again.

[0127] Along the movement direction of the first pressing plate 11 and the second pressing plate 12, the projection of the deformable part 13 on one side of the first pressing plate 11 toward the electrode plate 2 coincides with the projection of the deformable part 13 on one side of the second pressing plate 12 toward the electrode plate 2. For the electrode plate 2, the projections of the first sealing part 21 and the second sealing part 23 on both sides of the electrode plate 2 coincide with each other, that is, the first sealing part 21 and the second sealing part 23 are symmetrically connected to both sides of the electrode plate 2. Thus, the deformable part 13 on one side of the first pressing plate 11 and the deformable part 13 on one side of the second pressing plate 12 are arranged facing each other, so that the projection of the deformable part 13 at the position where the deformation occurs toward the electrode plate 2 can completely cover the first sealing part 21 and the second sealing part 23, which is beneficial to improving the reliability and stability of the pressing tooling.

[0128] The projection of the deformable part 13 on one side of the second pressing plate 12 toward the electrode plate 2 covers the second seal 23. After the deformable part 13 on one side of the second pressing plate 12 deforms, the deformable part 13 can completely cover the second seal 23, reducing the risk that part of the structure of the second seal 23 cannot be pressed by the deformable part 13, and further reducing the risk that the adhesive 3 cannot be evenly and completely dispersed on the entire bottom of the second seal 23, thereby improving the reliability of the connection between the second seal 23 and the electrode plate 2.

[0129] like Figure 12 and Figure 13 As shown, along the width direction of the pressing fixture, the width dimension of the second sealing member 23 is L4, and the width dimension of the deformable member 13 on one side of the second pressing plate 12 is L5, satisfying 0.02 mm ≤ L5 - L4 ≤ 0.13 mm. In this embodiment, L5 - L4 can be any one of 0.02 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.08 mm, 0.10 mm, 0.12 mm, and 0.13 mm.

[0130] When L5-L4 is too small or too large, the reason for limiting the size of the deformed part of the deformed part 13 on the side of the second pressing plate 12 is the same as that for the deformed part 13 on the side of the first pressing plate 11, so it will not be repeated here.

[0131] Example 6:

[0132] A type of pressing tool, such as Figure 15 As shown, it is basically the same as in Example 4, except that the seals on both sides of the electrode plate 2 are staggered. The specific differences are as follows:

[0133] Along the movement direction of the first pressing plate 11 and the second pressing plate 12, the projection of the deformable part 13 on one side of the first pressing plate 11 toward the electrode plate 2 is offset from the projection of the deformable part 13 on one side of the second pressing plate 12 toward the electrode plate 2. For the electrode plate 2, the projections of the first sealing part 21 and the second sealing part 23 on both sides of the electrode plate 2 are usually offset from each other, that is, the first sealing part 21 and the second sealing part 23 are asymmetrically connected to both sides of the electrode plate 2. This offsets the deformable part 13 on one side of the first pressing plate 11 and the deformable part 13 on one side of the second pressing plate 12 relative to the electrode plate 2, so that the position where the deformable part 13 deforms, that is, the projection of the deformed part toward the electrode plate 2, can completely cover the first sealing part 21 and the second sealing part 23, which is beneficial to improving the reliability and stability of the pressing tooling operation.

[0134] In the above embodiments, the pressing fixture is externally connected to a driving device to control the first pressing plate 11 and the second pressing plate 12 to move closer or further away from each other. The driving device is a hydraulic cylinder driving device or a motor driving device, etc. The above embodiments do not limit the driving device, as long as it can control the first pressing plate 11 and the second pressing plate 12 to move relative to each other.

[0135] The deformable part 13 is mechanically or adhesively connected to the pressing plate and the fixing part, so that the deformable part 13 can be fixed to the first pressing plate 11 or the second pressing plate 12, and the first fixing part 14 or the second fixing part 15, reducing the risk that the deformable part 13 will detach from the first pressing plate 11 or the second pressing plate 12, and the first fixing part 14 or the second fixing part 15 during the deformation process, and further improving the reliability of the pressing tooling operation. In the above embodiment, the deformable part 13 is mechanically connected to the pressing plate and the fixing part by screws. In particular, when the projection of the deformable part 13 toward the electrode plate 2 only covers the seal and not the electrode plate 2, the screws are fixed to the edge part of the deformable part 13 to avoid affecting the coverage of the seal after the deformable part 13 deforms.

[0136] The material of the deformable part 13 is selected from rubber, latex or soft plastic, etc., and the material has elastic deformation ability so that the deformable part 13 can fit well with the first seal 21 or the second seal 23, thereby allowing the adhesive 3 to be evenly dispersed on the entire bottom of the first seal 21 or the second seal 23. This is beneficial to improving the reliability of the connection between the first seal 21 or the second seal 23 and the electrode plate 2, and thus improving the sealing performance of the first seal 21 or the second seal 23 for the electrode plate 2.

[0137] Specifically, since the material of the sealing element is usually selected from latex or rubber with elastic deformation capability, the hardness of the material selected for the deformable part 13 should be less than the hardness of the material selected for the sealing element. This is to improve the fit between the outer contour of the deformable part 13 on the side facing the electrode plate 2 after deformation and the outer contour of the first sealing element 21 or the second sealing element 23 on the side facing the first pressing plate 11 or the second pressing plate 12. This further improves the uniformity of the compressive stress at each position in the first sealing element 21 or the second sealing element 23, and improves the reliability of the connection between the first sealing element 21 or the second sealing element 23 and the electrode plate 2. The above embodiment does not limit the material of the deformable part 13, as long as it has elastic deformation capability and can recover its deformation after being subjected to a certain pressure, and the hardness of the selected material is less than the hardness of the material selected for the sealing element.

[0138] Example 7:

[0139] A pressing method, such as Figure 16 As shown, the first seal 21 and the electrode plate 2 of the fuel cell are pressed together using any of the tooling in Examples 1 to 3. The specific steps are as follows:

[0140] S1. Place the electrode plate 2 on the second pressing plate 12. The first sealing groove 22 of the electrode plate 2 is coated with adhesive 3. The first sealing member 21 and the first sealing groove 22 are pre-fixed by adhesive 3.

[0141] S2. Control the first pressing plate 11 and the second pressing plate 12 to move closer to each other so that the deformable part 13 on one side of the first pressing plate 11 contacts the first sealing part 21;

[0142] S3. Control the deformation of the deformable part 13 so that the outer contour of the deformable part 13 facing the electrode plate 2 matches the outer contour of the first seal 21 facing the first pressing plate 11.

[0143] Through the deformation of the deformable part 13, the surface of the first sealing element 21 facing the first pressing plate 11 is completely fitted by the elastically deformed deformable part 13. As the first pressing plate 11 and the second pressing plate 12 continue to approach each other, the first pressing plate 11 uniformly presses the first sealing element 21 with the deformable part 13, which is fitted with all positions in the first sealing element 21. This improves the uniformity of stress at the interface where the first sealing element 21 contacts the adhesive 3, allowing the adhesive 3 to be evenly dispersed throughout the bottom of the first sealing element 21. This is beneficial to improving the reliability of the connection between the first sealing element 21 and the electrode plate 2, thereby improving the sealing effect of the first sealing element 21.

[0144] Example 8:

[0145] A pressing method, such as Figure 17As shown, the pressing of the first seal 21 and the electrode plate 2 of the fuel cell is performed using any of the tooling in Examples 1 to 3, which is basically the same as in Example 7. The difference is that in step S30, air is blown onto the seal instead of step S3, which presses the plates closer together to control the deformation of the deformable part 13. The specific differences are as follows:

[0146] S30. Gas is introduced into the first channel 111 through the first air inlet 112, thereby causing the deformable part 13 to deform so that the outer contour of the deformable part 13 facing the electrode plate 2 matches the outer contour of the first sealing part 21 facing the first pressing plate 11.

[0147] By introducing gas into the first channel 111 through the first air inlet 112, the deformation of the deformable part 13 can be controlled simply by introducing gas into the first channel 111. When the first pressing plate 11 and the second pressing plate 12 are close to each other, it is impossible to directly control the deformation based on the uneven surface of the first seal 21 facing the pressing fixture. Instead, the deformation of the deformable part 13 is relied upon. When the surface of the first seal 21 facing the first pressing plate 11 is completely fitted by the elastically deformed deformable part 13, the stroke of the pressing fixture is relatively large. By using the air-introduction method, there is no need to set up a separate mechanical structure to drive the deformation of the deformable part 13. It is not necessary to drive the relative movement of the pressing plates throughout the entire process, which would cause the part of the first pressing plate 11 outside the projection of the first seal 21 to do useless work. This is beneficial to simplify the structure of the pressing fixture and reduce the production cost of the pressing fixture. At the same time, using the air-introduction method to cause the deformation of the deformable part 13, instead of driving the relative movement of the pressing plates from the outside to cause the deformation of the deformable part 13, is beneficial to reduce the energy consumption of the pressing fixture during operation.

[0148] Example 9:

[0149] A pressing method, such as Figure 18 As shown, the pressing of the first seal 21, the second seal 23, and the electrode plate 2 of the fuel cell is performed using any of the tooling in Examples 1 to 6, which is basically the same as in Example 8. The difference is that there is a subsequent flipping and blowing step after step S30. The specific steps are as follows:

[0150] S4. Stop the air supply to the first channel 111 and release the air through the first air inlet 112;

[0151] S5. Control the first pressing plate 11 and the second pressing plate 12 to move away from each other;

[0152] S6. Flip the electrode plate 2 so that the side of the electrode plate 2 with the second sealing element 23 faces the first pressing plate 11.

[0153] S7. Control the first pressing plate 11 and the second pressing plate 12 to move closer to each other so that the deformable part 13 on one side of the first pressing plate 11 contacts the second sealing part 23.

[0154] S8. Gas is introduced into the first channel 111 through the first air inlet 112, thereby causing the deformable part 13 to deform so that the outer contour of the deformable part 13 facing the electrode plate 2 matches the outer contour of the second seal 23 facing the first pressing plate 11.

[0155] By blowing air twice, the adhesive 3 can be evenly dispersed on the entire bottom of the first seal 21 and the second seal 23, so that both the first seal 21 and the second seal 23 can be reliably fixed to the electrode plate 2. At the same time, blowing air twice is suitable for the case where the first seal 21 and the second seal 23 are asymmetrically connected to both sides of the electrode plate 2. In addition, after the first pressing plate 11 presses the first seal 21 and the electrode plate 2 together, by flipping the electrode plate 2 and pressing the second seal 23 together with the electrode plate again by the first pressing plate 11, the pressing fixture only has the deformable part 13 on one side of the first pressing plate 11, and there is no need to set the deformable part 13 on the second pressing plate 12 side, thereby simplifying the structure of the pressing fixture.

[0156] Example 10:

[0157] A pressing method, such as Figure 19 As shown, the pressing of the first seal 21, the second seal 23, and the electrode plate 2 of the fuel cell is performed using any of the tooling in Examples 4 to 6, which is basically the same as in Example 8. The difference is that in step S31, air is blown onto both seals simultaneously instead of air being blown onto one seal in step S30. The specific differences are as follows:

[0158] S2. Control the first pressing plate 11 and the second pressing plate 12 to move closer to each other, so that the deformable part 13 on one side of the first pressing plate 11 contacts the first sealing part 21, and the deformable part 13 on one side of the second pressing plate 12 contacts the second sealing part 23.

[0159] S31. Gas is introduced into the first channel 111 through the first air inlet 112, thereby causing the deformable part 13 on one side of the first pressing plate 11 to deform so that the outer contour of the deformable part 13 facing the electrode plate 2 matches the outer contour of the first sealing part 21 facing the first pressing plate 11. Gas is then introduced into the second channel 121 through the second air inlet 122, thereby causing the deformable part 13 on one side of the second pressing plate 12 to deform so that the outer contour of the deformable part 13 facing the electrode plate 2 matches the outer contour of the second sealing part 23 facing the second pressing plate 12.

[0160] Simultaneous blowing from both sides allows the adhesive 3 to be evenly dispersed across the entire bottom of the first seal 21 and the second seal 23, ensuring that both seals are reliably fixed to the electrode plate 2. Simultaneous blowing from both sides is suitable for cases where the first seal 21 and the second seal 23 are symmetrically connected to both sides of the electrode plate 2, as well as cases where they are asymmetrically connected. By venting air into the first channel 111 of the first pressing plate 11 and the second channel 121 of the second pressing plate 12, the deformable parts 13 on one side of the first pressing plate 11 and the second pressing plate 12 can both deform. This means that the first pressing plate 11 and its deformable part 13 press the first seal 21 and the electrode plate 2, while the second pressing plate 12 and its deformable part 13 press the second seal 23 and the electrode plate 2. During the pressing process, there is no need to flip the electrode plate 2, reducing the steps required for pressing and thus improving the efficiency of the pressing tool.

[0161] In step S31, air can be supplied to the first air inlet 112 and the second air inlet 122 simultaneously, or they can be supplied at different times.

[0162] In the above embodiments, the deformation of the deformable member 13 can also be controlled in other ways. For example, a mechanical telescopic structure (not shown in the figure) that moves along the thickness direction of the pressing tool can be provided between the first pressing plate 11 and the deformable member 13. When the first pressing plate 11 contacts the higher part of the first sealing member 21 through the deformable member 13, the mechanical telescopic structure moves toward the first sealing member 21, the deformable member 13 elastically deforms and contacts the lower part of the first sealing member 21, and then the first pressing plate 11 and the second pressing plate 12 continue to approach each other. The first pressing plate 11 and the mechanical telescopic mechanism jointly press the first sealing member 21, thereby improving the uniformity of stress on the interface where the first sealing member 21 contacts the adhesive 3, so that the adhesive 3 can be evenly dispersed on the entire bottom of the first sealing member 21, and thus the first sealing member 21 is reliably connected to the electrode plate 2.

[0163] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A pressing tool, characterized in that, The tooling is used to press and seal the electrode plate (2) of the fuel cell. The electrode plate (2) has a sealing groove. The sealing element is bonded to the sealing groove by an adhesive (3). The tooling includes a first pressing plate (11), a second pressing plate (12) and a deformable part (13). The first pressing plate (11) is used to contact the sealing element, and the second pressing plate (12) is used to place the electrode plate (2). The first pressing plate (11) and the second pressing plate (12) can move relative to each other. The deformable part (13) is disposed on at least one of the pressing plates facing the electrode plate (2), and the projection of the deformable part (13) towards the electrode plate (2) at least covers the seal. When the first pressing plate (11) and the second pressing plate (12) approach each other, the deformable part (13) elastically deforms when it comes into contact with the seal, so that the outer contour of the deformable part (13) is the same as the outer contour of the seal.

2. The pressing tooling according to claim 1, characterized in that, The electrode plate (2) is provided with a sealing element on one side, or with sealing elements provided symmetrically or asymmetrically on both sides; When a first sealing element (21) is provided on one side of the electrode plate (2), the tooling is used to press the first sealing element (21) and the electrode plate (2) of the fuel cell. A first sealing groove (22) is provided on the electrode plate (2). The first sealing element (21) is bonded to the first sealing groove (22) by an adhesive. The first pressing plate (11) is used to contact the first sealing element (21). The deformable part (13) is disposed on the surface of the first pressing plate (11) facing the electrode plate (2). The projection of the deformable part (13) facing the electrode plate (2) at least covers the first sealing member (21). When the first pressing plate (11) and the second pressing plate (12) approach each other, the deformable part (13) elastically deforms when it contacts the first sealing member (21) so that the outer contour of the deformable part (13) is the same as the outer contour of the first sealing member (21). When a first sealing element (21) and a second sealing element (23) are provided on both sides of the electrode plate (2), the tooling is also used to press the second sealing element (23). The electrode plate (2) also has a second sealing groove (24) on the side opposite to the first sealing groove (22). The second sealing element (23) is bonded to the second sealing groove (24) by adhesive (3). The second pressing plate (12) is used to place the electrode plate (2) and to contact the second sealing element (23). The deformable part (13) is also disposed on the surface of the second pressing plate (12) facing the electrode plate (2). The projections of the deformable parts (13) on both sides facing the electrode plate (2) respectively cover the first seal (21) and the second seal (23). When the first pressing plate (11) and the second pressing plate (12) approach each other, the deformable part (13) elastically deforms when it contacts the first seal (21) or the second seal (23) so that the outer contour of the deformable part (13) is the same as the outer contour of the first seal (21) or the second seal (23).

3. The pressing tooling according to claim 1, characterized in that, The pressing plate has a channel, and the pressing plate has an air inlet. The channel is connected to the air inlet and the air outlet. The air outlet is located on the surface of the pressing plate facing the electrode plate (2). The deformable part (13) covers the air outlet.

4. The pressing tooling according to claim 3, characterized in that, When the tooling is ventilated on one side, a first channel (111) is provided in the first pressing plate (11), a first air inlet (112) is provided on the first pressing plate (11), the first channel (111) is connected to the first air inlet (112) and the first air outlet (113), the first air outlet (113) is opened on the surface of the first pressing plate (11) facing the electrode plate (2), and the deformable part (13) on one side of the first pressing plate (11) covers the first air outlet (113). When the tooling is ventilated on both sides, in addition to the first channel (111) in the first pressing plate (11), the second channel (121) is opened in the second pressing plate (12). The second pressing plate (12) is provided with a second air inlet (122). The second channel (121) is connected to the second air inlet (122) and the second air outlet (123). The second air outlet (123) is opened on the surface of the second pressing plate (12) facing the electrode plate (2). The deformable part (13) on one side of the second pressing plate (12) covers the second air outlet (123).

5. The pressing tooling according to claim 1, characterized in that, The projection of the deformable part (13) toward the electrode plate (2) covers the seal, or covers the seal and the electrode plate (2).

6. A pressing tool according to claim 5, characterized in that, When the projection of the deformable part (13) toward the electrode plate (2) covers the seal and the electrode plate (2), the deformable part (13) includes a connecting part and a deformable part that are connected to each other. The projection of the deformable part toward the electrode plate (2) covers the seal, while the projection of the connecting part toward the electrode plate (2) does not cover the seal. The tooling also includes a fixing member, which is located on the side of the pressing plate facing the electrode plate (2). The connecting part is located between the fixing member and the pressing plate and is fixedly connected to the fixing member and the pressing plate. The fixing member is used to limit the deformation of the connecting part of the deformable part (13).

7. A pressing tool according to claim 6, characterized in that, When the projection of the deformable part (13) on one side of the first pressing plate (11) toward the electrode plate (2) covers the first seal (21) and the electrode plate (2), the deformable part (13) includes a first connecting part (131) and a first deformable part (132) that are connected to each other. The projection of the first deformable part (132) toward the electrode plate (2) covers the first seal (21), and the projection of the first connecting part (131) toward the electrode plate (2) does not cover the first seal (21). The tooling also includes a first fixing member (14), which is disposed on the side of the first pressing plate (11) facing the electrode plate (2). The first connecting part (131) is located between the first fixing member (14) and the first pressing plate (11) and is fixedly connected to the first fixing member (14) and the first pressing plate (11). The first fixing member (14) is used to limit the deformation of the first connecting part (131) of the deformable part (13) on one side of the first pressing plate (11). When the projection of the deformable part (13) on one side of the second pressing plate (12) toward the electrode plate (2) covers the second seal (23) and the electrode plate (2), the deformable part (13) includes a second connecting part (133) and a second deformable part (134) that are connected to each other. The projection of the second deformable part (134) toward the electrode plate (2) covers the second seal (23), and the projection of the second connecting part (133) toward the electrode plate (2) does not cover the second seal (23). The tooling also includes a second fixing member (15), which is disposed on the side of the second pressing plate (12) facing the electrode plate (2). The second connecting part (133) is located between the second fixing member (15) and the second pressing plate (12) and is fixedly connected to the second fixing member (15) and the second pressing plate (12). The second fixing member (15) is used to limit the deformation of the second connecting part (133) of the deformable part (13) on one side of the second pressing plate (12).

8. A pressing tool according to claim 1, characterized in that, Along the width direction of the tooling, the width dimension of the deformed part (13) - the width dimension of the seal is ≤ 0.13 mm.

9. A pressing method, characterized in that, The method uses the tooling as described in any one of claims 1 to 8 to press together the seal and the electrode plate (2) of the fuel cell, the method comprising the following steps: S1. Place the electrode plate (2) on the second pressing plate (12). The sealing groove of the electrode plate (2) is coated with adhesive (3). The sealing element and the sealing groove are pre-fixed by adhesive (3). S2. Control the first pressing plate (11) and the second pressing plate (12) to move closer to each other so that the deformed part (13) contacts the seal; S3. Ventilation or mechanical pressure control the deformation of the deformable part (13) so that the outer contour of the deformable part (13) facing the electrode plate (2) matches the outer contour of the seal facing the pressure plate.

10. A pressing method according to claim 9, characterized in that, When seals are provided on both sides of the electrode plate (2), the seals on both sides are deformed in two stages or simultaneously on both sides. During the two deformations, after the first seal (21) on one side of the first pressing plate (11) is deformed, the first pressing plate (11) and the second pressing plate (12) are controlled to move away from each other; Flip the electrode plate (2) so that the side of the electrode plate (2) with the second seal (23) faces the first pressing plate (11). Control the first pressing plate (11) and the second pressing plate (12) to move closer to each other so that the deformable part (13) on one side of the first pressing plate (11) contacts the second seal (23); Control the deformation of the deformable part (13) so that the outer contour of the deformable part (13) facing the electrode plate (2) matches the outer contour of the second seal (23) facing the first pressing plate (11); When deforming on both sides at the same time, the deformation of the deformable parts (13) on both sides is controlled simultaneously so that the outer contour of the deformable part (13) facing the electrode plate (2) matches the outer contour of the seal facing the pressing plate.

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