A fuel cell bipolar plate seal ring bonding production system

Abstract

The application discloses a kind of bipolar plate sealing ring bonding production systems of fuel cell, it is characterized in that, including the positioning plate for positioning sealing ring and silk screen printing glue coating mechanism, the positioning plate has with the positioning groove consistent with the shape of sealing ring to be bonded, the depth of the positioning groove is less than the thickness of sealing ring to be bonded;The silk screen printing glue coating mechanism includes mutually hinged polar plate fixed plate and silk screen fixed frame, the polar plate fixed plate has the positioning frame for positioning bipolar plate;The silk screen fixed frame is provided with printing silk screen towards the side of the polar plate fixed plate, and the printing silk screen has the glue permeation pattern consistent with the shape of sealing ring.The present application has the advantages of reasonable structure design, can improve the efficiency of small batch production, reduce production cost and the like.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a bipolar plate sealing ring bonding production system for fuel cells. Background Technology

[0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy; it is also known as an electrochemical generator. Fuel cells convert the Gibbs free energy portion of the fuel's chemical energy into electrical energy through an electrochemical reaction, without being limited by the Carnot cycle effect, resulting in high efficiency. Using fuel and oxygen as feedstock, fuel cells have no mechanical transmission parts, emit very few harmful gases, and have a long service life. Therefore, fuel cells are gradually becoming more widely used in everyday devices.

[0003] Bipolar plates, also known as current collectors, are a crucial component of fuel cells. They separate fuel from oxidant, prevent gas permeation, and collect and conduct current. In water-cooled fuel cells, cooling channels exist between the bipolar plates. These channels are typically located on one side of the bipolar plate, with a corresponding sealing ring bonded to the other side. The bipolar plates are then stacked and press-fitted to form the fuel cell. Since there are no sealing ring mounting slots on the plates, the sealing rings are usually applied using a dispensing machine and then bonded to the plates. Product development typically requires trial production and small-batch production before mass production. During trial production and small-batch production, manual dispensing is often used to save costs, resulting in low efficiency and poor dispensing quality. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a bipolar plate sealing ring bonding production system with a reasonable structural design that can improve the efficiency of small-batch production and reduce production costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A bipolar plate sealing ring bonding production system for a fuel cell is characterized by comprising a positioning plate for positioning the sealing ring and a screen printing adhesive applicator. The positioning plate has a positioning groove that matches the shape of the sealing ring to be bonded, and the depth of the positioning groove is less than the thickness of the sealing ring to be bonded. The screen printing adhesive applicator includes a plate fixing plate and a screen fixing frame hinged together. The plate fixing plate has a positioning frame for positioning the bipolar plate. A printing screen is provided on the side of the screen fixing frame facing the plate fixing plate, and the printing screen has a through-adhesive pattern that matches the shape of the sealing ring.

[0007] Using the above structure, the bipolar plate to be coated is placed within the positioning frame of the plate fixing plate. Then, a hinged screen fixing frame is placed over the plate fixing plate, and adhesive is evenly spread across the printed screen. The adhesive passes through the screen via the adhesive pattern, forming a uniform coating layer. A sealing ring is placed in the positioning groove of the positioning plate, and the coated bipolar plate is then placed on top. Because the depth of the positioning groove is less than the thickness of the sealing ring, the sealing ring will protrude slightly from the positioning plate. After the positioning plate and bipolar plate are attached, the sealing ring and the adhesive layer adhere tightly, thus completing the bonding. This structure uses screen printing for adhesive application, ensuring the precision of manual application. It eliminates the need for a dispensing machine, significantly reducing costs and improving efficiency for small-batch production.

[0008] Furthermore, a loading platform is provided below the screen printing adhesive coating mechanism. The loading platform includes a base plate parallel to the electrode plate fixing plate. Four guide columns arranged in a rectangle are vertically arranged on the base plate. The spacing between the guide columns in the width direction of the rectangle is the same as the width of the bipolar plate. The base plate also has a first lifting mechanism facing upward. A support plate is connected to the movable end of the first lifting mechanism. The support plate has four guide holes that match the guide columns. The support plate is slidably fitted onto the guide columns through the guide holes. The electrode plate fixing plate is fixedly installed at the other end of the four guide columns. The positioning frame passes through the electrode plate fixing plate and is directly opposite the bipolar plate placed between the four guide columns.

[0009] In this way, the bipolar plates that need to be coated with glue are stacked on the tray, with the bipolar plates facing the positioning frame. The first lifting mechanism can then send the bipolar plates upwards layer by layer into the positioning frame of the plate fixing plate, and then the glue is applied by the screen printing glue coating mechanism.

[0010] Furthermore, the first lifting mechanism includes a lead screw that passes vertically through the base plate and a lead screw nut that engages with the lead screw. The upper end of the lead screw is fixedly mounted on the support plate. The lead screw nut is rotatably mounted on the bottom of the base plate. A stepper motor is also mounted on the base plate. A large gear is mounted on the output end of the stepper motor. A small gear that meshes with the large gear is mounted on the lead screw nut.

[0011] In this way, the lifting height of the pallet can be precisely controlled by the cooperation of the lead screw, lead screw nut and stepper motor, ensuring that the top bipolar plate can cooperate with the screen printing glue coating mechanism.

[0012] Furthermore, a support column is provided at each of the four corners of the base plate, and the electrode plate fixing plate is fixedly installed on the four support columns.

[0013] Furthermore, the distance between the printing screen and the electrode fixing plate is equal to the thickness of the bipolar plate. A pusher assembly is provided on one side of the hinge axis of the electrode fixing plate. The pusher assembly includes a linear telescopic mechanism. The telescopic end of the linear telescopic mechanism faces the electrode fixing plate and is equipped with a pusher plate. The vertical distance between the pusher plate and the electrode fixing plate is less than the thickness of the bipolar plate. An electrode positioning seat is flush with the side of the electrode fixing plate opposite to the pusher assembly.

[0014] Since the distance between the printing screen and the electrode plate fixing plate is equal to the thickness of the bipolar plate, when the screen printing adhesive is applied, the bottom of the bipolar plate must be flush with the upper surface of the electrode plate fixing plate. After the extension end of the linear telescopic mechanism extends, it can directly push the bipolar plate on the electrode plate fixing plate onto the electrode plate positioning seat.

[0015] Furthermore, a second lifting mechanism is vertically arranged directly below the electrode positioning seat. The movable end of the second lifting mechanism faces the top plate for supporting the positioning plate. The electrode positioning seat includes a rotary mechanism and a base installed on the rotating end of the rotary mechanism. A support plate flush with the electrode fixing plate is provided on the base. A gripping mechanism for fixing the bipolar plates is provided on the support plate. The rotation axis of the rotary mechanism is parallel to the hinge axis of the electrode fixing plate.

[0016] In this way, after the bipolar plate is pushed onto the support plate, it is fixed on the support plate by the gripping mechanism. The rotation mechanism drives the base and the support plate to rotate, so that the bipolar plate on the support plate faces downward. At this time, the second lifting mechanism directly below presses the positioning plate with the sealing ring fixed on it upward onto the bipolar plate through the top plate, thus completing the bonding of the bipolar plate and the sealing ring.

[0017] Furthermore, two support plates are arranged symmetrically along the radial direction of the rotary mechanism.

[0018] In this way, while pressing and bonding bipolar plates on one support plate, the other support plate can complete the receiving and fixing of the bipolar plates, which helps to improve work efficiency.

[0019] Furthermore, the rotary mechanism is a 180-degree rotary cylinder or a stepper motor.

[0020] Furthermore, the gripping mechanism includes ventilation holes that penetrate the support plate, and multiple ventilation holes are arranged in a matrix along the length and width directions of the support plate; all ventilation holes are connected to a vacuum adsorption system.

[0021] In this way, during the rotation of the support plate, the bipolar plate is fixed to the support plate under the vacuum negative pressure adsorption. After the press-fit bonding is completed, the vacuum adsorption is canceled, allowing the bipolar plate and the positioning plate to fall onto the top plate and detach from the support plate as the top plate descends.

[0022] Furthermore, a conveyor roller is provided directly below the electrode plate positioning seat. The width of the baffle of the conveyor roller matches the width of the positioning plate. Each of the four corners of the top plate has a vertically arranged top rod. The upper end of the top rod has a positioning protrusion with a small diameter. The positioning plate has four positioning holes that correspond one-to-one with the positioning protrusions. The diameter of the positioning holes is the same as the diameter of the positioning protrusions.

[0023] In this way, the top rod can pass through the conveyor roller to support the positioning plate, thereby achieving press-fit bonding.

[0024] In summary, the present invention has the advantages of reasonable structural design, which can improve the efficiency of small-batch production and reduce production costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the bonding production system.

[0026] Figure 2 and Figure 3 This is a schematic diagram of the adhesive application and press-fit bonding components.

[0027] Figure 4 This is a schematic diagram of the bipolar plate in this embodiment.

[0028] Figure 5 This is a schematic diagram of another structure for the gripping mechanism and the support plate.

[0029] Figure 6 for Figure 5 A schematic diagram of the structure of the middle support plate in reverse state. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments.

[0031] In practical implementation: such as Figures 1-3 As shown, a bipolar plate sealing ring bonding production system for a fuel cell includes a positioning plate 1 for positioning the sealing ring and a screen printing and adhesive application mechanism 2. The positioning plate 1 has a positioning groove that matches the shape of the sealing ring to be bonded, and the depth of the positioning groove is less than the thickness of the sealing ring to be bonded. The screen printing and adhesive application mechanism 2 includes a plate fixing plate 21 and a screen fixing frame 23 that are hinged to each other. The plate fixing plate 21 has a positioning frame for positioning the bipolar plate. A printing screen 22 is provided on the side of the screen fixing frame 23 facing the plate fixing plate 21, and the printing screen 22 has a through-glue pattern that matches the shape of the sealing ring.

[0032] Below the screen printing adhesive coating mechanism 2, a loading platform 3 is also provided. The loading platform 3 includes a base plate 31 arranged parallel to the electrode plate fixing plate 21. Four guide columns 32 arranged in a rectangle are vertically arranged on the base plate 31. The spacing of the guide columns 32 in the width direction of the rectangle is the same as the width of the bipolar plate. The base plate 31 also has a first lifting mechanism 33 facing upward. A support plate 34 is connected to the movable end of the first lifting mechanism 33. The support plate 34 has four guide holes that match the guide columns 32. The support plate 34 is slidably fitted onto the guide columns 32 through the guide holes. The electrode plate fixing plate 21 is fixedly installed on the other end of the four guide columns 32. The positioning frame passes through the electrode plate fixing plate 21 and is directly opposite the bipolar plate placed between the four guide columns 32. In addition, in order to increase the connection strength between the electrode fixing plate 21 and the base plate 31, a support column 36 is provided at each of the four corners of the base plate 31. The electrode fixing plate 21 is fixedly installed on the four support columns 36, and the diameter of the support column 36 is larger than the diameter of the guide column 32.

[0033] The first lifting mechanism 33 includes a lead screw that passes vertically through the base plate 31 and a lead screw nut that cooperates with the lead screw. The upper end of the lead screw is fixedly installed on the support plate 34. The lead screw nut is rotatably installed on the bottom of the base plate 31. A stepper motor 35 is also installed on the base plate 31. A large gear is installed at the output end of the stepper motor 35. A small gear that meshes with the large gear is installed on the lead screw nut.

[0034] In this embodiment, as Figure 4 As shown, the bipolar plate has two arc-shaped notches on each side of its width. The diameter of the guide post 32 is the same as the diameter of the arc-shaped notches. The center distance between any two guide posts 32 is equal to the center distance between the two arc-shaped notches in the same direction, so that the bipolar plate can only move up and down along the guide posts between the four guide posts.

[0035] The distance between the printing screen 22 and the electrode fixing plate 21 is equal to the thickness of the bipolar plate. A pusher assembly 4 is provided on one side of the hinge axis of the electrode fixing plate 21. The pusher assembly 4 includes a linear telescopic mechanism 41. The telescopic end of the linear telescopic mechanism 41 faces the electrode fixing plate 21 and is equipped with a pusher plate 42. The vertical distance between the pusher plate 42 and the electrode fixing plate 21 is less than the thickness of the bipolar plate. An electrode positioning seat 5 is flush with the side of the electrode fixing plate 21 away from the pusher assembly 4. Below the electrode positioning seat 5, there is a vertically arranged second lifting mechanism 6. The movable end of the second lifting mechanism 6 faces upward and is provided with a top plate 61 for supporting the positioning plate 1. The electrode positioning seat 5 includes a rotary mechanism 51 and a base 52 installed on the rotating end of the rotary mechanism 51. The base 52 is provided with a support plate 53 that is flush with the electrode fixing plate 21. The support plate 53 has a protruding positioning block on the side away from the electrode fixing plate 21. The positioning side of the positioning block is parallel to the pushing side of the pusher plate 42. The support plate 53 is provided with a gripping mechanism for fixing the bipolar plates. The rotation axis of the rotary mechanism is parallel to the hinge axis of the electrode fixing plate 21. There are two support plates 53 arranged symmetrically along the radial direction of the rotary mechanism.

[0036] In this embodiment, the rotary mechanism can be a 180-degree rotary cylinder or a stepper motor; the linear telescopic mechanism 41 and the second lifting mechanism 6 are both cylinders.

[0037] The gripping mechanism includes ventilation holes that pass through the support plate 53. Multiple ventilation holes are arranged in a matrix along the length and width of the support plate 53. All ventilation holes are connected to a vacuum adsorption system.

[0038] To improve production efficiency, a conveyor roller conveyor is located directly below the electrode plate positioning seat 5. The width of the baffle of the conveyor roller conveyor matches the width of the positioning plate. Multiple conveyor roller conveyors are connected end to end, and there are sealing ring loading stations and bipolar plate unloading stations along the conveyor roller conveyors. Each of the four corners of the top plate 61 has a vertically arranged top rod 62. The upper end of the top rod has a small-diameter positioning protrusion. The positioning plate 1 has four positioning holes corresponding to the positioning protrusions, and the diameter of the positioning holes is the same as the diameter of the positioning protrusions. For this purpose, the baffle of the conveyor roller conveyor also has a telescopic cylinder arranged along the width direction. A stop block is installed on the piston rod of the telescopic cylinder. A Hall sensor for detecting the positioning plate is also provided on the conveyor roller conveyor. The Hall sensor is located at the material-incoming end of the stop block in the conveying direction.

[0039] During production, workers install the sealing rings in the positioning grooves of the positioning plate at the sealing ring loading station, and place the positioning plate with the positioning grooves facing upwards on the conveyor rollers. The positioning plate is conveyed by the conveyor rollers to the bottom of the electrode positioning seat 5. Once the Hall sensor detects the presence of the positioning plate, the telescopic cylinder drives the stop block to extend, blocking the positioning plate from continuing to be conveyed forward.

[0040] At another workstation, a screen printing adhesive applicator applies adhesive to the bipolar plates on the electrode plate fixing plate. After adhesive application, a linear telescopic mechanism extends and pushes the adhesive-coated bipolar plates onto the connecting support plate via a pusher plate 42 until they contact the positioning block. After the linear telescopic mechanism retracts, a stepper motor drives the lead screw nut to rotate, driving the lead screw to move upward and conveying one layer of bipolar plates upward through the support plate. The bipolar plates on the support plate are then adsorbed by a vacuum adsorption system through the air holes of the support plate 53. A rotary mechanism rotates the base 52 180 degrees, turning the bipolar plates downward.

[0041] At this time, the second lifting mechanism 6 drives the top plate 61 to move upward, the top rod 62 passes through the conveyor roller, and the positioning protrusion cooperates with the positioning hole on the positioning plate, finally lifting the positioning plate and pressing it with the downward-facing bipolar plate. At the same time, the vacuum adsorption system cancels the negative pressure adsorption, and the pressed bipolar plate and the positioning plate fall together with the second lifting mechanism and fall onto the conveyor roller to continue conveying. At the bipolar plate unloading station, the worker removes the bipolar plate with the sealing ring attached and puts the positioning plate back on the conveyor roller, which is then conveyed to the sealing ring loading station.

[0042] In specific implementation, the gripping mechanism can also adopt the following structure:

[0043] like Figure 5 and Figure 6 As shown, the rotation axis of the rotary mechanism is arranged along the width direction of the support plate 53. The support plate 53 has a first positioning block 54 that is slidably arranged along the width direction on the side opposite to the electrode fixing plate 21. An elastic reset member is provided between the first positioning block 54 and the support plate 53 to move the first positioning block 54 toward the cathode fixing plate 21. Two first positioning blocks 54 are arranged at intervals along the length direction of the support plate 53.

[0044] The support plate 53 has a second positioning block 55 on the side near the electrode fixing plate 21, which is positioned opposite the first positioning block 54 along the width direction. The second positioning block 55 is rotatably mounted on the support plate 53 via a hinge shaft arranged along the length direction of the support plate 53. A torsion spring is sleeved on the hinge shaft of the second positioning block 55, and a limiting block is provided on the side away from the first positioning block 54. The two elastic arms of the torsion spring are supported between the support plate 53 and the second positioning block 55, so that the second positioning block 55 abuts against the limiting block and remains in an upright state. The minimum distance between the first positioning block 54 and the second positioning block 55 is less than the width of the bipolar plate, and the maximum distance between them is greater than the width of the bipolar plate.

[0045] Using the above structure, when the pusher plate pushes the bipolar plate from the electrode plate fixing plate to the support plate, the bipolar plate touches the second positioning block 55 and pushes the second positioning block 55 to rotate and fall towards the first positioning block 54. After passing the second positioning block 55, the bipolar plate continues to squeeze the first positioning block 54 and compress the elastic reset member until the bipolar plate leaves the first positioning block 54. The first positioning block 54 flips up under the action of the torsion spring and remains in an upright state under the action of the torsion spring and the limiting block. The second positioning block 55 moves towards the first positioning block 54 under the action of the elastic reset member and finally cooperates with the first positioning block 54 to clamp the bipolar plate on the support plate.

[0046] In a specific implementation, the support plate 53 includes a fixed base plate 531. Pressure plates 532 are arranged parallel to each other on the base plate 531 by elastic support members. The first positioning block 54 and the second positioning block 55 are both arranged on the base plate 531. The pressure plate 532 has a relief groove corresponding to the first positioning block 54 and the second positioning block 55. The first positioning block 54 has a first guide surface inclined on the side facing the second positioning block 55. The pressure plate 532 has a second guide surface that cooperates with the first guide surface. When the pressure plate 532 moves toward the base plate 531, the second guide surface pushes the first guide surface, causing the first positioning block 54 to move in a direction away from the second positioning block 55.

[0047] In this way, after the bipolar plate rotates to the lower position, it is pressed upward by the top plate and the positioning plate, which eventually causes the pressure plate to move towards the substrate. The cooperation of the second guide surface and the first guide surface increases the distance between the first positioning block 54 and the second positioning block 55, so that the bipolar plate can be unloaded at the same time as the bipolar plate sealing ring is pressed.

[0048] Considering that after the pressure plate is reset under the action of the elastic support, the first positioning block 54 may return to the state of clamping the bipolar plate under the action of the elastic reset member, in this embodiment, a gravity-type stop pin 56 is further provided, the specific structure of which is as follows:

[0049] The substrate 531 has a groove arranged along its length. The lower end of the first positioning block 54 is slidably fitted onto the groove. The elastic reset member is a helical spring arranged along its length within the groove. The helical spring is located on the side of the first positioning block 54 away from the second positioning block 55. The bottom of the groove has a through pin hole. A stop pin 56 is axially slidably inserted into the pin hole. The diameter of the stop pin 56 matches the diameter of the pin hole, and both ends have pin heads with a diameter larger than the diameter of the pin hole. The end of the pin hole facing the groove has a countersunk hole that matches the pin head. The diameter of the countersunk hole is the same as the diameter of the pin head, and the depth is the same as the length of the pin head. The distance between the side of the pin head away from the second positioning block 55 and the second positioning block 55 is greater than the width of the bipolar plate.

[0050] Thus, when the pusher plate pushes the first positioning block 54 to move away from the second positioning block 55 via the bipolar plate, the stop pin 56 falls to the bottom of the chute under gravity, and the pin head falls into the countersunk hole. As the rotary mechanism rotates, the base plate is above the pressure plate, and the top plate and positioning plate press the bipolar plate upwards, eventually pressing the pressure plate towards the base plate, causing the first positioning block 54 to move away from the second positioning block 55. Once the first positioning block 54 has passed the position of the stop pin 56, the stop pin 56 falls into the chute under gravity. As the top plate and positioning plate move downwards, the bipolar plate also falls. At this time, the pressure plate is reset by the elastic support, and the first positioning block 54 moves towards the second positioning block 55 under the action of the elastic reset member, and finally stops under the obstruction of the stop pin 56. At this time, the distance between the first positioning block 54 and the second positioning block 55 is greater than the width of the bipolar plate, allowing the bipolar plate to fall smoothly onto the conveyor roller.

[0051] In a specific implementation, each of the four corners of the substrate 531 has a through sliding hole, and the bottom of the pressure plate 532 has a sliding rod that can slide with the sliding hole. The sliding rod passes through the sliding hole and is fitted with a bolt at its end. The elastic support is a helical spring sleeved on the sliding rod.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bipolar plate sealing ring bonding production system for fuel cells, characterized in that, The device includes a positioning plate (1) for positioning a sealing ring and a screen printing adhesive applicator (2). The positioning plate (1) has a positioning groove that matches the shape of the sealing ring to be bonded, and the depth of the positioning groove is less than the thickness of the sealing ring to be bonded. The screen printing adhesive applicator (2) includes an electrode plate fixing plate (21) and a screen fixing frame (23) that are hinged to each other. The electrode plate fixing plate (21) has a positioning frame for positioning bipolar plates. The screen fixing frame (23) has a printing screen (22) on the side facing the electrode plate fixing plate (21), and the printing screen (22) has a transparent adhesive pattern that matches the shape of the sealing ring. Below the screen printing adhesive coating mechanism (2) is a loading platform (3), which includes a base plate (31) parallel to the electrode plate fixing plate (21). Four rectangular guide columns (32) are vertically arranged on the base plate (31), and the spacing of the guide columns (32) in the rectangular width direction is the same as the width of the bipolar plate. The base plate (31) also has a first lifting mechanism (33) facing upward. A support plate (34) is connected to the movable end of the first lifting mechanism (33). The support plate (34) has four guide holes that match the guide columns (32). The support plate (34) is slidably fitted onto the guide columns (32) through the guide holes. The electrode plate fixing plate (21) is fixedly installed on the other end of the four guide columns (32). The positioning frame passes through the electrode plate fixing plate (21) and is directly opposite the bipolar plate placed between the four guide columns (32). The distance between the printing screen (22) and the electrode fixing plate (21) is equal to the thickness of the bipolar plate. A pusher assembly (4) is provided on one side of the hinge axis of the electrode fixing plate (21). The pusher assembly (4) includes a linear telescopic mechanism (41). The telescopic end of the linear telescopic mechanism (41) faces the electrode fixing plate (21) and is equipped with a pusher plate (42). The vertical distance between the pusher plate (42) and the electrode fixing plate (21) is less than the thickness of the bipolar plate. An electrode positioning seat (5) is flush with the side of the electrode fixing plate (21) away from the pusher assembly (4). The electrode positioning seat (5) is also provided with a vertically arranged second lifting mechanism (6) directly below it. The movable end of the second lifting mechanism (6) faces and is provided with a top plate (61) for supporting the positioning plate (1). The electrode positioning seat (5) includes a rotary mechanism (51) and a base (52) installed on the rotating end of the rotary mechanism (51). The base (52) is provided with a support plate (53) that is flush with the electrode fixing plate (21). The support plate (53) is provided with a gripping mechanism for fixing the bipolar plates. The rotation axis of the rotary mechanism is parallel to the hinge axis of the electrode fixing plate (21).

2. The fuel cell bipolar plate sealing ring bonding production system as described in claim 1, characterized in that, The first lifting mechanism (33) includes a lead screw that passes vertically through the base plate (31) and a lead screw nut that cooperates with the lead screw. The upper end of the lead screw is fixedly installed on the support plate (34). The lead screw nut is rotatably installed on the bottom of the base plate (31). A stepper motor (35) is also installed on the base plate (31). A large gear is installed at the output end of the stepper motor (35). A small gear that meshes with the large gear is installed on the lead screw nut.

3. The bipolar plate sealing ring bonding production system for fuel cells as described in claim 1, characterized in that, Each of the four corners of the base plate (31) is provided with a support column (36), and the electrode plate fixing plate (21) is fixedly installed on the four support columns (36).

4. The bipolar plate sealing ring bonding production system for fuel cells as described in claim 1, characterized in that, Two support plates (53) are arranged symmetrically along the radial direction of the rotary mechanism.

5. The bipolar plate sealing ring bonding production system for fuel cells as described in claim 1, characterized in that, The rotary mechanism is a 180-degree rotary cylinder or a stepper motor.

6. The bipolar plate sealing ring bonding production system for fuel cells as described in claim 1, characterized in that, The gripping mechanism includes ventilation holes that pass through the support plate (53), and multiple ventilation holes are arranged in a matrix along the length and width directions of the support plate (53); all ventilation holes are connected to a vacuum adsorption system.

7. The bipolar plate sealing ring bonding production system for fuel cells as described in claim 6, characterized in that, The electrode positioning seat (5) is located directly below a conveying roller. The width of the baffle of the conveying roller matches the width of the positioning plate. The top plate (61) has a vertically arranged top rod (62) at each of its four corners. The upper end of the top rod has a positioning protrusion with a small diameter. The positioning plate (1) has four positioning holes that correspond one-to-one with the positioning protrusions. The diameter of the positioning holes is the same as the diameter of the positioning protrusions.

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