A tiltable universal fuel cell stack assembly fixture device

Abstract

The present invention discloses a universal fuel cell stack assembly fixture device that can be tilted. Two T-shaped rails are symmetrically arranged on the upper surface of the tilted bottom plate, and a positioning adjustment unit is respectively arranged at the three ends of each T-shaped rail. The support platform is located above the positioning adjustment unit and the four corners of the support platform are respectively fixedly connected to the tilted bottom plate through pillars. The fuel cell stack is placed on the support platform, and the positioning rod is located around the support platform and is fixedly connected to the positioning adjustment unit. The two diagonal corners of the tilted bottom plate that are cut are respectively movably connected to the two diagonal corners in the fixed bottom plate through a rotating shaft bracket and an inclination adjustment assembly. The present invention improves the positioning accuracy during the assembly of the fuel cell stack, can be applied to fuel cell stacks of various sizes, facilitates the positioning of the assembly, and ensures the consistency of the stack assembly.

Description

Technical Field

[0001] The invention relates to a fuel cell stack assembly fixture device in the field of renewable energy, and in particular to a tiltable universal fuel cell stack assembly fixture device. Background Art

[0002] In the past few decades, non-renewable energy represented by traditional fossil energy has been overdeveloped and used, which has not only brought about the crisis of energy depletion, but also caused serious environmental pollution and climate change. Therefore, people are constantly looking for and developing new green, clean and renewable energy. Among the current new energy sources, hydrogen energy has outstanding advantages such as high calorific value, no pollution and renewable, and is an ideal alternative energy to fossil fuels.

[0003] Hydrogen fuel cells are one of the main ways to utilize hydrogen energy. They are power generation devices that directly convert the chemical energy of hydrogen and oxygen into electrical energy. They are not limited by the Carnot cycle and not only have the advantages of high energy conversion efficiency and environmental friendliness of general fuel cells, but also have the advantages of low operating temperature and fast start-stop response. At present, hydrogen fuel cells are developing in the direction of high power. High-power fuel cell stacks are assembled from a large number of battery components. The positioning accuracy of the components during the assembly process directly affects the performance, life and safety of the battery. The assembly of the fuel cell stack can be roughly divided into three steps: stacking, stacking and tightening. During the stacking process of the components, the components are often difficult to close to the positioning rod, resulting in misalignment between the upper and lower components. Since the friction between the components is large and some components are flexible, it is difficult to adjust the position of the components by lateral force once they are stacked. The Chinese invention patent (application number: CN202110244029.4) discloses a fixing device for fuel cell assembly, including a clamping mechanism, a moving mechanism and a fixing mechanism, which can be applied to the assembly and processing of fuel cells of various sizes and is convenient for automated assembly. The Chinese invention patent (application number: CN202111020866.5) discloses a hydrogen fuel cell stacking fixture and its use method and purpose, including a substrate and at least two positioning components detachably fixed to the surface of the substrate. The fixture has a simple structure and is easy to process. It can be used for the full-process positioning of battery stack end plates and bipolar plates of different specifications and sizes.

[0004] However, the structure of the currently disclosed fuel cell stack assembly fixture does not solve the problem of accurate positioning during stacking, and there is still the possibility of component misalignment. The prior art lacks a universal fuel cell stack assembly fixture that can be tilted to achieve tilted stacking of stacks of various sizes, solve the positioning problem of components during assembly, and improve the performance, life and safety of the stack. Summary of the invention

[0005] In order to solve the problem of insufficient component stacking positioning accuracy in the process of hydrogen fuel cell stack assembly in the background technology, the present invention provides a tiltable universal fuel cell stack assembly fixture device to achieve the purpose of optimizing the reactor structure, improving the compactness and power density of the reactor, and improving the sealing of the reactor.

[0006] The technical solution of the present invention is as follows:

[0007] The device includes a tilting mechanism, an I-shaped support platform, pillars, T-shaped tracks, a positioning adjustment unit and a positioning rod; two T-shaped tracks are symmetrically arranged on the upper surface of the tilting mechanism, and a positioning adjustment unit is respectively provided at three ends of each T-shaped track. The support platform is located above the positioning adjustment unit and the four corners of the support platform are respectively fixedly connected to the tilting mechanism through pillars. The fuel cell stack is placed on the support platform, and the positioning rod is located around the support platform and is fixedly connected to the positioning adjustment unit.

[0008] The tilting mechanism comprises a rotating shaft bracket, a rectangular fixed bottom plate, a tilting bottom plate and a tilt angle adjustment assembly; the tilting bottom plate is a rectangular plate with two diagonal corners cut off, one diagonal corner of the tilting bottom plate being rotatably connected to one diagonal corner of the fixed bottom plate through the rotating shaft bracket, and the other diagonal corner of the tilting bottom plate being movably connected to the other diagonal corner of the fixed bottom plate through the tilt angle adjustment assembly;

[0009] The inclination adjustment assembly comprises a lower shaft bracket, a lower shaft, an upper shaft bracket, an adjusting screw and an upper shaft; the lower shaft bracket and the upper shaft bracket are respectively fixedly mounted on a diagonal in the fixed base plate and a diagonal in the inclined base plate that is subjected to angle cutting, the lower shaft and the upper shaft are respectively rotatably mounted on the lower shaft bracket and the upper shaft bracket, a threaded through hole is provided in the middle of the upper shaft, a smooth blind hole is provided in the middle of the lower shaft, the lower end of the adjusting screw passes through the threaded through hole of the upper shaft and enters into the blind hole of the lower shaft and is fixedly connected to the lower shaft, and the middle part of the adjusting screw is connected to the upper shaft through a thread.

[0010] The positioning adjustment unit comprises two sliders, a rotating shaft support, a rotating shaft cover, a positioning rod, a T-shaped bracket, an adjustment bolt and a bolt base; the two sliders are fixedly mounted at one end of the T-shaped track, a slider close to the end of the T-shaped track is fixedly mounted with a bolt base, and the other slider away from the end of the T-shaped track is fixedly mounted with a rotating shaft support and a rotating shaft cover in sequence from bottom to top, a square groove is provided at a side close to the bolt base at the connecting position of the rotating shaft support and the rotating shaft cover, one end of the T-shaped bracket passes through the square groove and is rotatably connected to the rotating shaft support and the rotating shaft cover respectively, the other end of the T-shaped bracket is movably connected to the bolt base so as to move up and down through the adjustment bolt, and the positioning rod is fixedly connected to the middle of the T-shaped bracket.

[0011] The support platform includes a platform plate and a support beam; the platform plate and the support beam are both located above the positioning and adjustment unit, the platform plate is arranged along the long side direction of the inclined bottom plate, the fuel cell stack is placed on the platform plate, and the four support beams are fixedly connected to the four corners of the platform plate to form an I-shaped support platform, each pillar is located at the opening position of the T-shaped track, and each pillar is symmetrically arranged in a rectangular shape on the upper surface of the inclined bottom plate, and each support beam is fixedly connected to the pillar by a pillar bolt.

[0012] Each T-shaped track includes two guide rails, one guide rail is placed in the middle of the inclined bottom plate and arranged along the short side of the inclined bottom plate, and the other guide rail is placed on the periphery of the inclined bottom plate and arranged along the long side of the inclined bottom plate, and the slider is fixedly installed on the guide rail.

[0013] The beneficial effects of the present invention are:

[0014] 1) The present invention improves the positioning accuracy during fuel cell assembly. The present invention adopts a tiltable fixture design, which makes the stack in a tilted state during the component stacking process, ensuring that the components are close to the three positioning rods under the action of gravity to achieve three-point positioning, and the positioning rods have an inclination adjustment mechanism to ensure the accurate constraint of the three positioning rods in three degrees of freedom, thereby achieving higher assembly positioning accuracy.

[0015] 2) The present invention can adapt to different battery stack sizes and fastening methods, and is easy to adjust the position of the positioning rod and replace the battery stack support platform according to different battery stacks. The present invention can be applied to fuel cell stacks of various sizes, facilitate assembly positioning and ensure the consistency of battery stack assembly.

[0016] 3) The present invention facilitates the assembly of the battery stack. The switch between the tilted and vertical states of the fixture can be completed by simply rotating the screw. Since the fixture is tilted during stacking, the three rods that are not involved in positioning can be removed so that the components can be placed from the side and above, which facilitates the assembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a left and right isometric drawing of the present invention.

[0018] Figure 2 It is a left and right isometric view of the battery stack support of the present invention.

[0019] Figure 3 It is a top view of the left and right isometric axes of the positioning mechanism of the present invention.

[0020] Figure 4 It is a top view of the left and right isometric axes of the clamp tilting mechanism of the present invention.

[0021] Figure 5 It is a schematic diagram of the tilted assembly of the battery stack according to the present invention.

[0022] In the figure: 1. tilting mechanism; 2. pivot bracket; 3. fixed base plate; 4. tilting base plate; 5. tilt adjustment assembly; 6. battery stack support; 7. support platform; 8. pillar; 9. positioning module; 10. positioning rod adjustment unit; 11. guide rail; 12. slider; 13. pivot support; 14. pivot cover; 15. positioning rod; 16. T-bracket; 17. adjustment bolt; 18. bolt base; 19. lower pivot bracket; 20. lower pivot; 21. upper pivot bracket; 22. adjustment screw; 23. upper pivot; 24. pillar bolt; 25. platform plate; 26. support beam. Specific implementation method 44

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, the device includes a tilting mechanism 1, an I-shaped support platform 7, pillars 8, T-shaped rails, a positioning adjustment unit 10 and a positioning rod 15; two T-shaped rails are symmetrically arranged on the upper surface of the tilting mechanism 1, and a positioning adjustment unit 10 is respectively provided at three ends of each T-shaped rail. The support platform 7 is located above the positioning adjustment unit 10 and the four corners of the support platform 7 are respectively fixedly connected to the tilting mechanism 1 through the pillars 8. The general fuel cell stack is placed on the support platform 7, and the positioning rod 15 is located around the support platform 7 and is fixedly connected to the positioning adjustment unit 10.

[0026] The tilting mechanism 1 comprises a rotating shaft bracket 2, a rectangular fixed bottom plate 3, a tilting bottom plate 4 and a tilt angle adjustment assembly 5; the tilting bottom plate 4 is a rectangular plate with two diagonal corners cut off, one diagonal corner of the tilting bottom plate 4 with the cut off corner is rotatably connected to one diagonal corner of the fixed bottom plate 3 through the rotating shaft bracket 2, and the other diagonal corner of the tilting bottom plate 4 with the cut off corner is movably connected to the other diagonal corner of the fixed bottom plate 3 through the tilt angle adjustment assembly 5, and the rotating shaft in the rotating shaft bracket 2 is provided with a shaft shoulder to prevent the two bottom plates 3 and 4 from moving along the axial direction of the rotating shaft bracket 2;

[0027] like Figure 3As shown, the tilt angle adjustment assembly 5 includes a lower shaft bracket 19, a lower shaft 20, an upper shaft bracket 21, an adjustment screw 22 and an upper shaft 23; the lower shaft bracket 19 and the upper shaft bracket 21 are respectively fixedly mounted on a diagonal of the fixed base plate 3 and a diagonal of the inclined base plate 4 that is cut with an angle treatment. When the inclined base plate 4 is not lifted up, the lower shaft bracket 19 is located directly below the upper shaft bracket 21, and the lower shaft 20 and the upper shaft 23 are respectively rotatably mounted on the lower shaft bracket 19 and the upper shaft bracket 21. A threaded through hole is opened in the middle of the upper rotating shaft 23, and a smooth blind hole is opened in the middle of the lower rotating shaft 20. The lower end of the adjusting screw 22 passes through the threaded through hole of the upper rotating shaft 23 and enters into the blind hole of the lower rotating shaft 20 and is fixedly connected with the lower rotating shaft 20. The middle part of the adjusting screw 22 is connected with the upper rotating shaft 23 through a thread. Both the upper rotating shaft 23 and the lower rotating shaft 20 are provided with shaft shoulders to prevent the tilting base plate 4 and the fixed base plate 3 from being misaligned, causing the adjusting screw 22 to be subjected to shear force. The tilting angle of the tilting base plate 4 can be controlled by rotating the adjusting screw 22.

[0028] like Figure 2 As shown, the positioning adjustment unit 10 includes two sliders 12, a rotating shaft support 13, a rotating shaft cover 14, a positioning rod 15, a T-shaped bracket 16, an adjustment bolt 17 and a bolt base 18; the two sliders 12 are fixedly installed at one end of the T-shaped track, a slider 12 close to the end of the T-shaped track is fixedly installed with the bolt base 18, and the other slider 12 away from the end of the T-shaped track is fixedly installed with the rotating shaft support 13 and the rotating shaft cover 14 in sequence from bottom to top, and a square groove is opened at the side of the connecting position of the rotating shaft support 13 and the rotating shaft cover 14 close to the bolt base 18, and one end of the T-shaped bracket 16 passes through the square groove and is respectively connected to the rotating shaft support 13 and the rotating shaft. The cover 14 is rotatably connected, and the other end of the T-shaped bracket 16 is movably connected to the bolt base 18 through an adjusting bolt 17 so as to be movable up and down. A vertically upward threaded hole is provided in the middle of the bolt base 18, and the adjusting bolt 17 is installed in the threaded hole and contacts with the T-shaped bracket 16. The rotation angle of the T-shaped bracket 16 can be changed by changing the extension height of the adjusting bolt 17. The positioning rod 15 is fixedly connected to the middle of the T-shaped bracket 16. A threaded rod is provided in the middle of the T-shaped bracket 16. A threaded hole matching the threaded rod of the T-shaped bracket 16 is provided at the bottom of the positioning rod 15. The positioning rod 15 and the T-shaped bracket 16 are fixed by threaded connection for easy disassembly and assembly.

[0029] like Figure 4As shown, the support platform 7 includes a platform plate 25 and a support beam 26; the platform plate 25 and the support beam 26 are both located above the positioning and adjusting unit 10, the platform plate 25 is arranged along the long side direction of the inclined bottom plate 4, the fuel cell stack is placed on the platform plate 25, and a plurality of grooves are provided on the upper surface of the platform plate 25 to facilitate the steel belt to pass through from under the fuel cell stack so as to bind and fix the fuel cell stack, four support beams 26 are respectively fixedly connected to the four corners of the platform plate 25 to form an I-shaped support platform 7, each support column 8 is respectively located at the opening position of the T-shaped track and each support column 8 is symmetrically arranged on the upper surface of the inclined bottom plate 4 in a rectangular shape, and each support beam 26 is fixedly connected to the support column 8 by a support bolt 24.

[0030] Each T-shaped track includes two guide rails 11, one guide rail 11 is placed in the middle of the inclined bottom plate 4 and arranged along the short side of the inclined bottom plate 4, and the other guide rail 11 is placed on the outer periphery of the inclined bottom plate 4 and arranged along the long side of the inclined bottom plate 4. The two guide rails 11 in the T-shaped track are vertical, and the slider 12 is fixedly installed on the guide rail 11. The slider 12 can be removed and installed at any position of the guide rail 11.

[0031] The support platform 7 and the pillar 8 form the stack support 6, the positioning adjustment unit 10, the positioning rod 15 and the T-track form the positioning module 9, and the tilting mechanism 1 can tilt the stack support 6 and the positioning module 9 at a certain angle. When the device is tilted, the fuel cell stack can be close to both sides. When the fuel cell stack is assembled when the device is tilted, the side of the fuel cell stack is close to the three positioning rods 15 on the tilted side under the action of gravity to form a three-point positioning. The other three positioning rods 15 can be disassembled when tilted to facilitate the placement and precise positioning of the fuel cell stack. After the fuel cell stack is stacked, the disassembled positioning rods 15 can be reinstalled, and the slider 12 can be moved along the guide rail 11 and against the fuel cell stack to fix the position of the fuel cell stack. Finally, the tilting bottom plate 4 is rotated to adjust the rotating adjustment screw 22 to level the device.

[0032] In a specific implementation, the rectangle formed by the four pillars 8 has a length between 350 mm and 450 mm and a width between 150 mm and 250 mm. The axis distance between the two parallel guide rails 11 is between 200 mm and 300 mm, and the length is greater than 300 mm. The minimum distance between the other two colinear guide rails 11 is less than 300 mm, and the length is greater than 150 mm. The maximum angle between the inclined bottom plate 4 and the fixed bottom plate 3 is greater than 15 degrees. The length of the T-shaped bracket 16 is between 100 mm and 150 mm.

[0033] like Figure 5As shown, when preparing to stack the components of the fuel cell stack, adjust the position of the three inclination adjustment components 5 on both sides of the rotating shaft bracket 2 on the guide rail 11 according to the size of the fuel cell stack, and lock the slider 12 to fix it. Turn the adjustment bolt 17 to adjust the inclination of the three positioning rods 15 in the inclination adjustment component 5 to ensure that the positioning rods 15 are in a vertical state. Remove the three positioning rods 15 away from both sides of the rotating shaft bracket 2, and turn the adjustment screw 22 to lift the inclined bottom plate 4. When stacking the fuel cell stack with the device tilted, the fuel cell stack can be placed on the upper side, and the side of the fuel cell stack is close to the three positioning rods 15 under the action of gravity to form a three-point positioning. After the fuel cell stack is stacked, the three removed positioning rods 15 are reinstalled, and the slider 12 is moved along the guide rail 11 so that the positioning rods 15 are against the side of the fuel cell stack, and then the corresponding slider 12 is locked, and the adjustment bolt 17 is turned to clamp the positioning rods 15 to the fuel cell stack. Then rotate the bottom plate adjustment screw 22 to flatten the device, and use a press to press the fuel cell stack. After the press-fitting is completed, the fuel cell stack is tightened.

[0034] The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Within the spirit of the present invention and the protection scope of the claims, that is, equivalent changes and modifications made according to the protection scope of the present invention and the contents of the specification should fall within the protection scope of the present invention.

Claims

1. A tiltable universal fuel cell stack assembly fixture device, characterized in that: The invention comprises a tilting mechanism (1), an I-shaped support platform (7), pillars (8), a T-shaped track, a positioning adjustment unit (10) and a positioning rod (15); two T-shaped tracks are symmetrically arranged on the upper surface of the tilting mechanism (1); three ends of each T-shaped track are respectively provided with a positioning adjustment unit (10); the support platform (7) is located above the positioning adjustment unit (10) and the four corners of the support platform (7) are respectively fixedly connected to the tilting mechanism (1) via the pillars (8); the fuel cell stack is placed on the support platform (7); the positioning rod (15) is located around the support platform (7) and is fixedly connected to the positioning adjustment unit (10); The tilting mechanism (1) comprises a rotating shaft bracket (2), a rectangular fixed bottom plate (3), a tilting bottom plate (4) and a tilt angle adjustment assembly (5); the tilting bottom plate (4) is a rectangular plate with two diagonal corners cut off, one diagonal corner of the tilting bottom plate (4) being rotatably connected to one diagonal corner of the fixed bottom plate (3) via the rotating shaft bracket (2), and the other diagonal corner of the tilting bottom plate (4) being cut off is movably connected to the other diagonal corner of the fixed bottom plate (3) via the tilt angle adjustment assembly (5); The tilt angle adjustment assembly (5) comprises a lower rotating shaft bracket (19), a lower rotating shaft (20), an upper rotating shaft bracket (21), an adjusting screw (22) and an upper rotating shaft (23); the lower rotating shaft bracket (19) and the upper rotating shaft bracket (21) are respectively fixedly mounted on a diagonal of the fixed base plate (3) and a diagonal of the inclined base plate (4) that is subjected to angle cutting, the lower rotating shaft (20) and the upper rotating shaft (23) are respectively rotatably mounted on the lower rotating shaft bracket (19) and the upper rotating shaft bracket (21), a threaded through hole is provided in the middle of the upper rotating shaft (23), a smooth blind hole is provided in the middle of the lower rotating shaft (20), the lower end of the adjusting screw (22) passes through the threaded through hole of the upper rotating shaft (23) and enters into the blind hole of the lower rotating shaft (20) and is fixedly connected to the lower rotating shaft (20), and the middle of the adjusting screw (22) is connected to the upper rotating shaft (23) via a thread; The positioning adjustment unit (10) comprises two sliders (12), a rotating shaft support (13), a rotating shaft cover (14), a positioning rod (15), a T-shaped bracket (16), an adjustment bolt (17) and a bolt base (18); the two sliders (12) are fixedly mounted on one end of the T-shaped track, one slider (12) close to the end of the T-shaped track is fixedly mounted with the bolt base (18), and the other slider (12) far from the end of the T-shaped track is fixedly mounted with the rotating shaft support (13) and the rotating shaft cover (14) in sequence from bottom to top, a square groove is provided at a connection position between the rotating shaft support (13) and the rotating shaft cover (14) on one side close to the bolt base (18), one end of the T-shaped bracket (16) passes through the square groove and is rotatably connected to the rotating shaft support (13) and the rotating shaft cover (14), the other end of the T-shaped bracket (16) is movably connected to the bolt base (18) via the adjustment bolt (17), and the positioning rod (15) is fixedly connected to the middle of the T-shaped bracket (16); The support platform (7) comprises a platform plate (25) and a support beam (26); the platform plate (25) and the support beam (26) are both located above the positioning adjustment unit (10); the platform plate (25) is arranged along the long side direction of the inclined bottom plate (4); the fuel cell stack is placed on the platform plate (25); four support beams (26) are respectively fixedly connected to four corners of the platform plate (25) to form an I-shaped support platform (7); each support column (8) is respectively located at an opening position of the T-shaped track and each support column (8) is symmetrically arranged on the upper surface of the inclined bottom plate (4) in a rectangular shape; and each support beam (26) is fixedly connected to the support column (8) via a support column bolt (24).

2. The tiltable universal fuel cell stack assembly fixture device according to claim 1, characterized in that: Each T-shaped track comprises two guide rails (11), one guide rail (11) is placed in the middle of the inclined bottom plate (4) and arranged along the short side of the inclined bottom plate (4), and the other guide rail (11) is placed on the outer periphery of the inclined bottom plate (4) and arranged along the long side of the inclined bottom plate (4), and the slider (12) is fixedly mounted on the guide rail (11).

Images