Method for installing a sealing grommet

Abstract

The application relates to a sealing rubber ring mounting method, which comprises the following steps: firstly, laying the sealing rubber ring in a rubber groove of a tool; then, adsorbing the sealing rubber ring in the rubber groove by using a flat plate grabbing device; and finally, mounting the sealing rubber ring by using the flat plate grabbing device to be inverted on one side of a bipolar plate containing a sealing groove. The mounting method can realize accurate positioning of a sealing rubber ring with a complex shape or a large sealing rubber ring, can realize one-time grabbing and mounting of multiple sealing rubber rings, is simple and fast to operate, and greatly improves the processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of bipolar plate technology, and more specifically to a method for installing a sealing ring. Background Technology

[0002] A fuel cell is an electrochemical power generation device that directly and efficiently converts the chemical energy of fuel and oxidant into electrical energy. Sealing rings are an important auxiliary component in a fuel cell stack. Their presence keeps the fuel chamber, oxidant chamber, and coolant chamber of the fuel cell stack isolated, preventing the media in each chamber from mixing or leaking during battery operation and thus ensuring the sealing of the fuel cell stack.

[0003] Currently, the main methods for installing large and complex sealing rings or multiple sealing rings include: pre-applying a primer to the sealing groove, then manually pressing the sealing ring into the groove; or designing a special fixture to fix the sealing ring, and then inverting the workpiece with the primer applied to the sealing groove onto the sealing ring to achieve installation. Especially in the field of fuel cells, in the bipolar plate sealing structure of fuel cells, the sealing ring is fixed in the bipolar plate sealing groove to achieve battery sealing. Currently, the main methods for fixing the sealing ring to the bipolar plate sealing groove are to manually align and paste the sealing ring onto the metal bipolar plate, or to design a fixture, first lay the sealing ring on the fixture, then pre-apply primer to the bipolar plate sealing groove, and then invert the bipolar plate onto the sealing ring to achieve fixation.

[0004] CN217114454U discloses a device for fixing the sealing adhesive line of a fuel cell bipolar plate. In use, the pre-prepared adhesive is evenly applied to the sealing adhesive line groove on the side of the bipolar plate that is mirror-image of the sealing adhesive line groove on the flat plate, with the adhesive-coated side of the bipolar plate facing down. The bipolar plates are then stacked on the flat plate with the sealing adhesive line laid on them, and the positioning rods are inserted into the two diagonally positioned holes of the bipolar plates. This completes the bonding of the sealing adhesive line on one side of the bipolar plate.

[0005] However, most fuel cells currently in the research and development stage require small-batch production and assembly. During the manual application of sealing rings, misalignment of the rings is highly likely, leading to gas leaks during operation. Using a sealing ring positioning fixture, the bipolar plates are inverted and placed on the fixture to transfer the sealing rings onto the bipolar plates. This process requires the bipolar plates to fall smoothly; otherwise, the sealing rings will shift and cannot be accurately fixed in their original positions.

[0006] Therefore, how to accurately position the sealing rings and achieve quick installation of complex or multiple sealing rings is a problem that needs to be solved. Summary of the Invention

[0007] To address the above problems, the present invention aims to provide a method for installing sealing rings. Compared with the prior art, the installation method provided by the present invention can accurately position the sealing rings, realize the one-time grasping and installation of multiple or complex sealing rings, and improve installation efficiency.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] This invention provides a method for installing a sealing ring, the method comprising the following steps:

[0010] (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring.

[0011] (2) The flat plate gripping device is attached to the side of the tooling containing the sealing ring in step (1) so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then the tooling and the flat plate gripping device are separated to obtain the flat plate gripping device containing the sealing ring.

[0012] (3) Place the side of the flat plate gripping device containing the sealing ring in step (2) upside down on the side of the bipolar plate containing the sealing groove, and then separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

[0013] The installation method provided by this invention first involves laying a sealing ring flat within a groove in a tooling fixture. The shape of the groove is anti-symmetrical to the sealing ring, allowing for precise positioning of the sealing ring. Then, a flat gripping device, approximately the same size as the tooling, is used. During operation, the flat gripping device is placed against the tooling with the sealing ring laid out, utilizing the suction force of its surface to grip the sealing ring. Afterward, the flat gripping device, now holding the sealing ring, is attached to a bipolar plate, achieving precise positioning and installation of the sealing ring. This installation method is suitable not only for gripping and installing complex-shaped or large sealing rings but also for installing multiple sealing rings.

[0014] In this invention, during the installation process, visual inspection can be used to check whether the outer surfaces of the sealing ring, tooling, and flat gripping device are dry and whether there are large-sized contaminant particles, spots, etc., to ensure that the equipment operates normally during the installation process.

[0015] Preferably, the tooling in step (1) contains at least one glue tank, for example, one, two or three, but not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0016] In this invention, by setting multiple adhesive grooves, multiple sealing rings can be grasped and installed.

[0017] Preferably, the depth of the adhesive groove is 50-70% of the thickness of the sealing ring, for example, it can be 50%, 52%, 55%, 58%, 60%, 62%, 65%, 68% or 70%, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0018] The present invention preferably controls the depth of the glue groove within a specific range. On the one hand, this avoids the glue groove being too deep, which would prevent the sealing ring from being adsorbed onto the flat plate gripping device. On the other hand, it avoids the glue groove being too shallow, which would prevent it from fixing the position of the sealing ring.

[0019] Preferably, the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.3-0.5mm, for example, it can be 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0020] The present invention preferably controls the width of the gap on both sides within a specific range, which can further ensure that the sealing ring is fixed in the corresponding position and does not produce a large displacement.

[0021] Preferably, the surface roughness Ra of the contact surface between the adhesive groove and the sealing ring is 2.2-4.2μm, for example, it can be 2.2μm, 2.4μm, 2.6μm, 2.8μm, 3μm, 3.2μm, 3.4μm, 3.6μm, 3.8μm, 4μm or 4.2μm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0022] Preferably, the roughness Rz of the contact surface between the rubber groove and the sealing ring is 6.3-10.5μm, for example, it can be 6.3μm, 6.5μm, 7μm, 7.5μm, 8μm, 8.5μm, 9μm, 9.5μm, 10μm or 10.5μm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0023] The present invention preferably controls the roughness Ra and Rz of the contact surfaces between the glue groove and the sealing ring within a specific range, which can prevent the sealing ring from sticking to the tooling glue groove.

[0024] In this invention, the hardness of the sealing ring is generally HRC40-65. In this invention, the tooling has two fixing holes diagonally provided at the bottom and top, and is positioned by inserting positioning pins and a flat plate gripping device into the fixing holes.

[0025] Preferably, the side of the flatbed gripping device that is in contact with the tooling in step (2) is covered with rubber material.

[0026] Preferably, the rubber material includes any one or a combination of at least two of nitrile rubber, silicone rubber, chloroprene rubber, fluorosilicone rubber, or natural rubber.

[0027] In this invention, applying rubber material can increase the adsorption force between the flatbed gripping device and the sealing ring, so that the sealing ring is stably adsorbed onto the flatbed gripping device.

[0028] Preferably, the thickness of the flatbed gripping device in step (2) is ≥15mm, for example, it can be 15mm, 16mm, 17mm, 18mm or 19mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0029] In this invention, the thickness of the flatbed gripper is determined based on its actual size, preferably ≥15mm. The hardness of the flatbed gripper is generally approximately HRC80.

[0030] Preferably, the roughness Ra of the contact surface between the flat gripping device and the sealing ring in step (2) is 0.05-0.2μm, for example, it can be 0.05μm, 0.1μm, 0.15μm or 0.2μm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0031] Preferably, the surface roughness Rz of the contact surface between the flat plate gripping device and the sealing ring is 0.1-0.4μm, for example, it can be 0.1μm, 0.2μm, 0.3μm or 0.4μm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0032] The present invention preferably controls the roughness Ra and Rz of the contact surface between the flatbed gripper and the sealing ring within a specific range, so that the sealing ring can be stably adsorbed on the flatbed gripper.

[0033] Preferably, when the flatbed gripper is attached to the tooling, the contact area between the flatbed gripper and the sealing ring is ≥ 75% of the upper surface area of ​​the sealing ring. For example, it can be 75%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, or 90%, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0034] Preferably, the plate gripping device in step (2) includes a plate; the plate is rectangular in shape; cooling chamber opening, air chamber opening and fuel chamber opening are arranged sequentially from top to bottom on both sides of the plate; two fixing holes are arranged diagonally at the bottom and top of the plate; a reaction zone opening is arranged in the middle of the plate; one side of the plate is fitted with the tooling, and a fixing handle is arranged on the other side.

[0035] Preferably, the fixed handle includes a robotic arm.

[0036] In this invention, the flat plate gripping device and the bipolar plate need to be positioned when they are attached. Positioning can be achieved through fixing holes or by using a robotic arm with a robot algorithm.

[0037] Preferably, the sealing groove of the bipolar plate in step (3) is pre-coated with primer.

[0038] Preferably, the thickness of the base adhesive is 0.05-0.1mm, for example, it can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm or 0.1mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0039] Preferably, the sealing groove of the bipolar plate in step (3) has the same shape as the glue groove of the tooling.

[0040] In this invention, the bipolar plate has two fixing holes at its bottom and top diagonally. The bipolar plate is positioned by inserting positioning pins into the fixing holes and using a flat plate gripping device. The bipolar plate is provided with a cooling cavity, an air cavity, and a fuel cavity in sequence at the positions of the cooling cavity opening, the air cavity opening, and the fuel cavity opening on the flat plate gripping device.

[0041] As a preferred embodiment of the present invention, the installation method includes the following steps:

[0042] (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring.

[0043] The tooling includes at least one glue groove; the depth of the glue groove is 50-70% of the thickness of the sealing ring; the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.3-0.5mm; the roughness Ra of the contact surface between the glue groove and the sealing ring is 2.2-4.2μm; the roughness Rz of the contact surface between the glue groove and the sealing ring is 6.3-10.5μm.

[0044] (2) The flat plate gripping device is attached to the side of the tooling containing the sealing ring in step (1) so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then the tooling and the flat plate gripping device are separated to obtain the flat plate gripping device containing the sealing ring.

[0045] The side of the flatbed gripper that contacts the tooling is covered with rubber material; the rubber material includes any one or a combination of at least two of nitrile rubber, silicone rubber, neoprene rubber, fluorosilicone rubber, or natural rubber; the thickness of the flatbed gripper is ≥15mm; the roughness Ra of the contact surface between the flatbed gripper and the sealing ring is 0.05-0.2μm; the roughness Rz of the contact surface between the flatbed gripper and the sealing ring is 0.1-0.4μm; when bonded, the contact area between the flatbed gripper and the sealing ring is ≥75% of the upper surface area of ​​the sealing ring;

[0046] (3) Apply a primer to the sealing groove of the bipolar plate. The thickness of the primer is 0.05-0.1mm. Then, place the side of the flat plate gripping device containing the sealing ring in step (2) upside down on the side of the bipolar plate containing the sealing groove. After that, separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] (1) The installation method provided by the present invention can achieve precise positioning of complex-shaped sealing rings or large sealing rings, avoid misalignment of the rings leading to gas leakage during operation, achieve good air tightness, and reduce the external leakage of the fuel cell stack to less than 0.19 mL / min / piece. Under optimal conditions, it can reach less than 0.02 mL / min / piece.

[0049] (2) The installation method provided by the present invention uses the adsorption force of rubber material to grasp the rubber ring, which can grasp and install multiple sealing rubber rings at one time. The operation is simple and quick, which greatly improves the processing efficiency. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the tooling structure described in Embodiment 1 of the present invention;

[0051] Figure 2 This is a top view of the tablet gripping device described in Embodiment 1 of the present invention;

[0052] Figure 3 This is a bottom view of the tablet gripping device described in Embodiment 1 of the present invention;

[0053] Figure 4 This is a front view of the tablet gripping device described in Embodiment 1 of the present invention;

[0054] Figure 5 This is a side view of the tablet gripping device described in Embodiment 1 of the present invention;

[0055] Figure 6 This is a schematic diagram of the structure of the bipolar plate after the sealing ring is installed according to Embodiment 1 of the present invention;

[0056] Among them, 1-cooling chamber opening; 2-air chamber opening; 3-fuel chamber opening; 4-fixing hole; 5-reaction zone opening; 6-fixing handle; 7-glue groove; 8-sealing ring; 9-cooling chamber; 10-air chamber; 11-fuel chamber. Detailed Implementation

[0057] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0058] Example 1

[0059] This embodiment provides a method for installing a sealing ring, the method comprising the following steps:

[0060] (1) Set a glue groove 7 on the surface of the tooling, and lay the sealing ring 8 flat in the glue groove 7 to obtain a tooling containing the sealing ring 8.

[0061] The structural diagram of the tooling is shown below. Figure 1 As shown, from Figure 1 It can be seen that the tooling has two fixing holes 4 diagonally at the bottom and top, and a glue groove 7 is provided on the tooling; the depth of the glue groove 7 is 60% of the thickness of the sealing ring 8; the width of the gap on both sides after the sealing ring 8 is laid flat in the glue groove 7 is 0.4mm; the roughness Ra of the contact surface between the glue groove 7 and the sealing ring 8 is 2.8μm; the roughness Rz of the contact surface between the glue groove 7 and the sealing ring 8 is 7.2μm.

[0062] (2) Fit the flat plate gripping device with the side of the tooling containing the sealing ring 8 in step (1), and position it by inserting a positioning pin into the positioning hole 4 so that the sealing ring 8 is adsorbed on the surface of the flat plate gripping device. Then separate the tooling and the flat plate gripping device to obtain the flat plate gripping device containing the sealing ring 8.

[0063] The top view, bottom view, front view, and side view of the tablet gripping device are respectively as follows: Figure 2-5As shown, the flat plate gripping device includes a flat plate; the flat plate is rectangular in shape; cooling chamber opening 1, air chamber opening 2, and fuel chamber opening 3 are respectively arranged from top to bottom on both sides of the flat plate; two fixing holes 4 are arranged diagonally at the bottom and top of the flat plate; a reaction zone opening 5 is arranged in the middle of the flat plate; one side of the flat plate is attached to the tooling, and a fixing handle 6 is provided on the other side; rubber material is applied to the side of the flat plate gripping device that is attached to the tooling; the rubber material is nitrile rubber; the thickness of the flat plate gripping device is 15mm; the roughness Ra of the contact surface between the flat plate gripping device and the sealing ring 8 is 0.1μm; the roughness Rz of the contact surface between the flat plate gripping device and the sealing ring 8 is 0.2μm; when attached, the contact area between the flat plate gripping device and the sealing ring 8 on the tooling is 95% of the upper surface area of ​​the sealing ring 8;

[0064] (3) Apply a primer to the sealing groove of the bipolar plate. The thickness of the primer is 0.06 mm. Then, the side of the flat plate gripping device containing the sealing ring 8 in step (2) is upside down on the side of the bipolar plate containing the sealing groove. Position it by inserting a positioning pin into the positioning hole 4. Then separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring 8.

[0065] The structural diagram of the bipolar plate after installing the sealing ring 8 is shown below. Figure 6 As shown, the bipolar plate has two fixing holes 4 at the bottom and top diagonally, and a cooling chamber 9, an air chamber 10, and a fuel chamber 11 are arranged in sequence at the positions of the cooling chamber opening 1, the air chamber opening 2, and the fuel chamber opening 3 on the flat plate gripping device.

[0066] Example 2

[0067] This embodiment provides a method for installing a sealing ring, the method comprising the following steps:

[0068] (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring.

[0069] The tooling contains 7 glue grooves; the depth of the glue groove is 50% of the thickness of the sealing ring; the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.3 mm; the roughness Ra of the contact surface between the glue groove and the sealing ring is 2.2 μm; the roughness Rz of the contact surface between the glue groove and the sealing ring is 6.3 μm.

[0070] (2) Fit the flat plate gripping device with the side of the tooling containing the sealing ring in step (1), and position it by inserting a positioning pin into the positioning hole 4 so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then separate the tooling and the flat plate gripping device to obtain the flat plate gripping device containing the sealing ring.

[0071] The side of the flatbed gripper that is in contact with the tooling is covered with rubber material; the rubber material is fluorosilicone rubber; the thickness of the flatbed gripper is 20mm; the roughness Ra of the contact surface between the flatbed gripper and the sealing ring is 0.05μm; the roughness Rz of the contact surface between the flatbed gripper and the sealing ring is 0.1μm; when in contact, the contact area between the flatbed gripper and the sealing ring on the tooling is 98% of the upper surface area of ​​the sealing ring;

[0072] (3) Apply a primer to the sealing groove of the bipolar plate. The primer is 0.07 mm thick. Then, place the side of the flat plate gripping device containing the sealing ring in step (2) upside down on the side of the bipolar plate containing the sealing groove. Position the device by inserting a positioning pin into the positioning hole 4. Then separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

[0073] Example 3

[0074] This embodiment provides a method for installing a sealing ring, the method comprising the following steps:

[0075] (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring.

[0076] The tooling contains 7 glue grooves; the depth of the glue groove is 70% of the thickness of the sealing ring; the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.5 mm; the roughness Ra of the contact surface between the glue groove and the sealing ring is 4.2 μm; the roughness Rz of the contact surface between the glue groove and the sealing ring is 10.5 μm.

[0077] (2) Fit the flat plate gripping device with the side of the tooling containing the sealing ring in step (1), and position it by inserting a positioning pin into the positioning hole 4 so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then separate the tooling and the flat plate gripping device to obtain the flat plate gripping device containing the sealing ring.

[0078] The side of the flatbed gripper that is in contact with the tooling is covered with rubber material; the rubber material is neoprene rubber; the thickness of the flatbed gripper is 25mm; the roughness Ra of the contact surface between the flatbed gripper and the sealing ring is 0.2μm; the roughness Rz of the contact surface between the flatbed gripper and the sealing ring is 0.4μm; when in contact, the contact area between the flatbed gripper and the sealing ring on the tooling is 96% of the upper surface area of ​​the sealing ring;

[0079] (3) Apply a primer to the sealing groove of the bipolar plate. The thickness of the primer is 0.1 mm. Then, the side of the flat plate gripping device containing the sealing ring in step (2) is upside down on the side of the bipolar plate containing the sealing groove. Position it by inserting a positioning pin into the positioning hole 4. Then separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

[0080] Example 4

[0081] This embodiment provides a method for installing a sealing ring, which differs from Embodiment 1 only in that the depth of the groove is 40% of the thickness of the sealing ring.

[0082] Example 5

[0083] This embodiment provides a method for installing a sealing ring, which differs from Embodiment 1 only in that the depth of the groove is 85% of the thickness of the sealing ring.

[0084] Example 6

[0085] This embodiment provides a method for installing a sealing ring, which differs from Embodiment 1 only in that the width of the gap on both sides after the sealing ring is laid flat in the groove is 0.1mm.

[0086] Example 7

[0087] This embodiment provides a method for installing a sealing ring, which differs from Embodiment 1 only in that the width of the gap on both sides after the sealing ring is laid flat in the groove is 1mm.

[0088] Comparative Example 1

[0089] This comparative example provides a method for installing a sealing ring, which does not employ a flat gripping device and includes the following steps:

[0090] (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring.

[0091] The tooling includes a glue groove; the depth of the glue groove is 60% of the thickness of the sealing ring; the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.4 mm; the roughness Ra of the contact surface between the glue groove and the sealing ring is 2.8 μm; the roughness Rz of the contact surface between the glue groove and the sealing ring is 7.2 μm.

[0092] (2) Apply a primer to the sealing groove of the bipolar plate with a thickness of 0.06 mm. Then, place the side of the bipolar plate containing the sealing groove upside down on the fixture. After that, separate the fixture and the bipolar plate to complete the installation of the sealing ring.

[0093] The bipolar plates were installed using the installation methods described in Examples 1-7. After the installed bipolar plates were dried until the colloid was cured, the air tightness of the bipolar plates was tested to obtain the external leakage of the fuel cell stack. The results are shown in Table 1.

[0094] Table 1

[0095]

[0096]

[0097] The following points can be observed from Table 1:

[0098] (1) As can be seen from the data in Examples 1-7, the installation method provided by the present invention can reduce the external leakage of the fuel cell stack to less than 0.19 mL / min / piece, and under better conditions, it can reduce it to less than 0.02 mL / min / piece.

[0099] (2) A comprehensive comparison of the data from Examples 1 and 4-5 shows that the depth of the glue groove in Example 1 is 60% of the thickness of the sealing ring. Compared with 40% and 85% in Examples 4-5, the leakage of the fuel cell stack in Example 1 is significantly lower than that in Examples 4-5. Therefore, it can be seen that the present invention preferably controls the percentage of the depth of the glue groove to the thickness of the sealing ring, which can further improve the airtightness.

[0100] (3) A comprehensive comparison of the data from Example 1 and Examples 6-7 shows that the width of the gap on both sides after the sealing ring is laid flat in the glue tank in Example 1 is 0.4 mm, which is 0.1 mm and 1 mm respectively in Examples 6-7. Therefore, the leakage of the fuel cell stack in Example 1 is significantly lower than that in Examples 6-7. It can be seen that the present invention preferably controls the width of the gap on both sides after the sealing ring is laid flat in the glue tank, which can further improve the air tightness.

[0101] (4) By comparing the data of Example 1 and Comparative Example 1, it can be seen that the installation method of using bipolar plates upside down on the tooling in Comparative Example 1 results in a significantly higher external air leakage of the fuel cell stack than in Example 1. Therefore, the installation method provided by the present invention can achieve a good sealing effect.

[0102] In summary, the installation method provided by this invention can grasp and install complex-shaped or large sealing rings, and is simple, quick, and provides a good sealing effect.

[0103] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A method of installing a sealing grommet, characterized by, The installation method includes the following steps: (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring; (2) The flat plate gripping device is attached to the side of the tooling containing the sealing ring in step (1) so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then the tooling and the flat plate gripping device are separated to obtain the flat plate gripping device containing the sealing ring. (3) Place the side of the flat plate gripping device containing the sealing ring in step (2) upside down on the side of the bipolar plate containing the sealing groove, and then separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

2. The mounting method according to claim 1, characterized in that, The tooling in step (1) contains at least one glue tank.

3. The mounting method according to claim 2, wherein The depth of the groove is 50-70% of the thickness of the sealing ring.

4. The mounting method according to claim 2, wherein The width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.3-0.5mm.

5. The method of installing of claim 2, wherein, The surface roughness Ra of the contact surface between the rubber groove and the sealing ring is 2.2-4.2 μm.

6. The mounting method according to claim 5, wherein The surface roughness Rz of the contact surface between the rubber groove and the sealing ring is 6.3-10.5μm.

7. The method of installing of claim 1, wherein, In step (2), rubber material is applied to the side of the flat gripping device that is in contact with the tooling.

8. The mounting method according to claim 7, wherein The rubber material includes any one or a combination of at least two of nitrile rubber, silicone rubber, chloroprene rubber, fluorosilicone rubber, or natural rubber.

9. The method of installing of claim 1, wherein, The thickness of the flatbed gripping device in step (2) is ≥15mm.

10. The method of installing of claim 1, wherein, The surface roughness Ra of the contact surface between the flat plate gripping device and the sealing ring in step (2) is 0.05-0.2μm.

11. The method of installing of claim 10, wherein, The surface roughness Rz of the contact surface between the flat plate gripping device and the sealing ring is 0.1-0.4μm.

12. The method of installing of claim 1, wherein, When the flat plate gripping device in step (2) is attached to the tooling, the contact area between the flat plate gripping device and the sealing ring is ≥ 75% of the upper surface area of ​​the sealing ring.

13. The method of installing of claim 1, wherein, The tablet gripping device in step (2) includes a tablet; The flat plate is rectangular in shape; The two sides of the plate are respectively provided with cooling chamber openings, air chamber openings and fuel chamber openings from top to bottom; The plate has two fixing holes at opposite corners on its bottom and top; The plate has a reaction zone opening in the middle; One side of the flat plate is fitted with the tooling, and the other side is provided with a fixed handle.

14. The method of mounting of claim 13, wherein, The fixed handle includes a robotic arm.

15. The installation method according to claim 1, characterized in that, In step (3), a primer is pre-applied to the sealing groove of the bipolar plate.

16. The installation method according to claim 15, characterized in that, The thickness of the base adhesive is 0.05-0.1mm.

17. The installation method according to claim 1, characterized in that, The sealing groove of the bipolar plate in step (3) has the same shape as the glue groove of the tooling.

18. The installation method according to claim 1, characterized in that, The installation method includes the following steps: (1) Set a glue groove on the surface of the tooling, and lay the sealing rubber ring flat in the glue groove to obtain a tooling containing the sealing rubber ring; The tooling includes at least one glue groove; the depth of the glue groove is 50-70% of the thickness of the sealing ring; the width of the gap on both sides after the sealing ring is laid flat in the glue groove is 0.3-0.5mm; the roughness Ra of the contact surface between the glue groove and the sealing ring is 2.2-4.2μm; the roughness Rz of the contact surface between the glue groove and the sealing ring is 6.3-10.5μm. (2) The flat plate gripping device is attached to the side of the tooling containing the sealing ring in step (1) so that the sealing ring is adsorbed on the surface of the flat plate gripping device. Then the tooling and the flat plate gripping device are separated to obtain the flat plate gripping device containing the sealing ring. The side of the flatbed gripper that contacts the tooling is covered with rubber material; the rubber material includes any one or a combination of at least two of nitrile rubber, silicone rubber, neoprene rubber, fluorosilicone rubber, or natural rubber; the thickness of the flatbed gripper is ≥15mm; the surface roughness Ra of the contact surface between the flatbed gripper and the sealing ring is 0.05-0.2μm; the surface roughness Rz of the contact surface between the flatbed gripper and the sealing ring is 0.1-0.4μm; when bonded, the contact area between the flatbed gripper and the sealing ring is ≥75% of the upper surface area of ​​the sealing ring; (3) Apply a primer to the sealing groove of the bipolar plate. The thickness of the primer is 0.05-0.1mm. Then, the side of the flat plate gripping device containing the sealing ring in step (2) is upside down on the side of the bipolar plate containing the sealing groove. After that, separate the flat plate gripping device and the bipolar plate to complete the installation of the sealing ring.

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