Constant pressure device for high temperature testing of fuel cells

Abstract

The application discloses a constant pressure device for high-temperature test of a fuel cell, which comprises a machine box, a heating furnace arranged above the machine box, a fixing table arranged at the bottom of the heating furnace, a supporting table arranged above the heating furnace, a moving table arranged above the supporting table and capable of moving forward and backward on the supporting table, a plurality of second fixing seats arranged on the moving table, guide shafts installed on the second fixing seats and arranged vertically, linear bearings slidably arranged on the guide shafts, a supporting plate arranged above the moving table and installed on the linear bearings, and a pressurizing rod installed at the lower part of the supporting plate. The application can apply constant pressure to the battery, so that the test can be better completed.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and more specifically, to a constant pressure device for high-temperature testing of fuel cells. Background Technology

[0002] Currently, high-temperature testing of batteries commonly employs methods such as servo pressurization, pneumatic pressurization, and manual screw pressurization to apply pressure. Servo and pneumatic pressurization are electrically controlled and can maintain a constant pressure throughout the heating process. However, for long-term testing, the test may be terminated due to power outages, gas supply interruptions, or control bugs, leading to experimental failure. With manual screw pressurization, the battery under test may expand due to temperature increases during heating. Since the screw position is not adjustable, this increases the pressure on the battery, potentially biasing the analysis of experimental results. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a constant pressure device for high-temperature testing of fuel cells.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention discloses a constant pressure device for high-temperature testing of fuel cells, comprising a chassis, a heating furnace disposed on top of the chassis, a fixed platform disposed at the bottom of the heating furnace, a support platform disposed above the heating furnace, a movable platform disposed above the support platform, the movable platform being able to move back and forth on the support platform, a plurality of fixed seats two disposed on the movable platform, a guide shaft mounted on the fixed seats two, the guide shaft being vertically disposed, a linear bearing slidably disposed on the guide shaft, a support plate disposed above the movable platform, the support plate being mounted on the linear bearing, and a pressure rod disposed on the lower part of the support plate.

[0006] Furthermore, the heating furnace includes two furnace doors that can be relatively far apart or close together.

[0007] Furthermore, the upper part of the chassis is provided with several fixed seats, and support rods are installed on the fixed seats. The support rods are set vertically, and the upper end of the support rods is connected to the bottom surface of the support platform.

[0008] Furthermore, a guide rail is provided on the upper part of the support platform, the guide rail is arranged in the front-to-back direction, and a slider is slidably installed on the guide rail, the slider is fixedly installed on the bottom of the moving platform.

[0009] Furthermore, a pressure sensor is installed on the lower part of the support plate, and a mounting base is installed on the lower part of the pressure sensor.

[0010] Furthermore, a guide is mounted on the support platform, and a movable rod is rotatably mounted on the side of the support plate, with part of the movable rod located inside the guide.

[0011] Furthermore, the guide includes a mounting frame, in which a guide plate is fixedly mounted, and an extension sleeve is fitted on the rear side of the guide plate. Guide holes are provided on the guide plate and the extension sleeve, and a moving rod is set through the guide holes.

[0012] Furthermore, the guide hole includes a receiving section formed on the guide plate, a horizontal section one connected to the rear side of the receiving section, the horizontal section one being connected to the lower rear end of the receiving section, an inclined section connected to the rear end of the horizontal section one, the height of the rear end of the inclined section being higher than the height of the front end of the inclined section, a horizontal section two connected to the rear end of the inclined section, and a horizontal section three formed on the extension sleeve, the horizontal section three being connected to the horizontal section two.

[0013] Furthermore, the extension sleeve has an installation opening on its side. One end of the installation opening is connected to the side of the extension sleeve near the guide plate. A screw is connected to the side of the guide plate. The screw passes through the installation opening, and a fixing nut is threaded onto the part of the screw that protrudes from the installation opening.

[0014] Furthermore, a contact sensor is installed at the same height as the horizontal section at the front end of the receiving section, and a lifting mechanism is installed on the support platform. The lifting mechanism is driven by a guide, and the contact sensor is electrically connected to the lifting mechanism.

[0015] Furthermore, the horizontal section is connected to a vertical section at its three rear ends. A support block is installed inside the vertical section. A lifting cylinder is installed on the side of the extension sleeve. The lifting cylinder drives a connecting arm, which is connected to the side of the support block.

[0016] The beneficial effects of this invention are: weights are placed on the support plate, and the weights act on the pressure rod to pressurize the battery. It is not affected by electrical, gas, or control failures, and can be tested stably for a long period of time; during the heating process, when the battery expands, it can drive the pressure rod to move upward, so that the pressure on the battery remains unchanged. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a constant pressure device for high-temperature testing of fuel cells in this embodiment;

[0018] Figure 2 This is a schematic diagram of the structure at the support platform in this embodiment;

[0019] Figure 3 This is a schematic diagram of a tooling state of the guide in this embodiment;

[0020] Figure 4 This is a cross-sectional view of the guide in this embodiment;

[0021] Figure 5 This is a schematic diagram of the assembly of the guide plate and the extension sleeve in this embodiment;

[0022] Figure 6 This is a schematic diagram of another tooling state of the guide in this embodiment.

[0023] Reference numerals: 1. Chassis; 2. Fixed base one; 3. Support rod; 4. Support platform; 5. Heating furnace; 6. Furnace door; 7. Fixed platform; 8. Battery; 9. Pressure rod; 10. Moving platform; 11. Guide rail; 12. Slider; 13. Mounting base; 14. Pressure sensor; 15. Support plate; 16. Linear bearing; 17. Fixed base two; 18. Guide shaft; 19. Weight; 20. Lifting mechanism; 21. Guide; 22. Moving rod; 23. Mounting frame 24. Guide plate; 25. Extension sleeve; 26. Guide hole; 27. Connecting rod one; 28. Connecting rod two; 29. ​​Movable rod; 30. Limiting groove; 31. Limiting block; 32. Receiving section; 33. Horizontal section one; 34. Inclined section; 35. Horizontal section two; 36. Horizontal section three; 37. Vertical section; 38. Support block; 39. Lifting cylinder; 40. Connecting arm; 41. Mounting opening; 42. Screw; 43. Fixing nut; 44. Contact sensor. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-6 As shown, a constant pressure device for high-temperature testing of fuel cells includes a housing 1 and a heating furnace 5, with the heating furnace 5 mounted above the housing 1. Several fixed seats 2 are provided on the upper part of the housing 1. Support rods 3 are mounted on the fixed seats 2, and are vertically arranged. A support platform 4 is connected to the upper end of the support rods 3. Several guide rails 11 are provided on the upper part of the support platform 4, and are arranged along the front-rear direction. Slider blocks 12 are slidably mounted on the guide rails 11, and a movable stage 10 is mounted on the upper part of the sliders 12. Several fixed seats 17 are mounted on the upper part of the movable stage 10, and guide shafts 18 are mounted on the fixed seats 17, and are vertically arranged. Linear bearings 16 are sleeved on the guide shafts 18, and support plates 15 are mounted on the linear bearings 16. A pressure rod 9 is mounted on the lower part of the support plate 15 via a pressure sensor 14, and the lower end of the pressure rod 9 is located inside the heating furnace 5. The mechanical structure is used for pressurization, which is unaffected by electrical, pneumatic, or control failures, allowing for stable testing over long periods.

[0026] During the process of heating furnace 5 closing and heating up, battery 8 may expand due to heat. The expanded part can push the pressure rod 9 to rise. Battery 8 will not bear additional pressure, so the pressure it receives remains unchanged.

[0027] The bottom of the support platform 4 is equipped with a fixed platform 7. The heating furnace 5 includes two furnace doors 6 located on the front side. The two furnace doors 6 can be relatively close or far apart to realize the closing or opening of the heating furnace 5.

[0028] With the two furnace doors 6 positioned relatively far apart, the heating furnace 5 is opened. Moving the moving platform 10 backward allows the pressure rod 9 to move backward without obstructing the installation of the battery 8. The battery 8 is then installed on the fixed platform 7. After installation, the moving platform 10 is moved forward until the pressure rod 9 reaches its preset position on the battery 8, with its lower end in contact with the battery 8. A weight 19 is placed on the support plate 15. The weight 19, through the support plate 15, causes the pressure rod 9 to move downward, applying pressure to the battery 8.

[0029] A mounting base 13 is provided in the middle of the moving platform 10, and the pressure rod 9 is set through the mounting base 13. The mounting base 13 is used to limit the pressure rod 9, so that the pressure rod 9 can move back and forth synchronously when the moving platform 10 moves back and forth, ensuring that the pressure rod 9 will not deviate.

[0030] like Figures 2-5 As shown, before the pressure rod 9 moves to the corresponding position on the battery 8, it may collide with the rear of the battery 8 due to its lower end being too low. Furthermore, as the pressure rod 9 moves on the battery 8, its lower end will contact the surface of the battery 8, causing friction and potentially damaging the lower end of the pressure rod 9 or the surface of the battery 8. By providing a guide 21 on the moving platform 10, and a movable rod 22 rotatably mounted on the side of the support plate 15, part of the movable rod 22 is located within the guide 21. The guide 21 guides the movable rod 22 during its back-and-forth movement to adjust the height of the support plate 15, thereby adjusting the height of the bottom end of the pressure rod 9. The pressure rod 9 only begins to descend when its lower end approaches a preset position on the battery 8, thus reducing friction between the pressure rod 9 and the battery 8 and protecting both.

[0031] The guide 21 includes a mounting frame 23, within which a guide plate 24 and an extension sleeve 25 are mounted. The extension sleeve 25 is fitted around the rear of the guide plate 24. Connecting rods 27 are connected to both the upper and lower ends of the guide plate 24, with the other end of each connecting rod 27 connected to the inner wall of the mounting frame 23. A second connecting rod 28 is connected to the front end of the guide plate 24, with the other end of each connecting rod 28 connected to the inner wall of the mounting frame 23. Limiting grooves 30 are formed on the upper and lower inner walls of the mounting frame 23, with limiting blocks 31 slidably disposed within each groove. A movable rod 29 is connected to the inner side of the limiting block 31, with the other end of the movable rod 29 connected to the extension sleeve 25. Guide holes 26 are formed on the guide plate 24 and the extension sleeve 25, through which a movable rod 22 passes. The guide hole 26 includes a receiving section 32 formed on the guide plate 24. A horizontal section 33 is connected to the rear side of the receiving section 32. The horizontal section 33 is connected to the lower rear end of the receiving section 32. An inclined section 34 is connected to the rear end of the horizontal section 33. The height of the rear end of the inclined section 34 is higher than the height of the front end of the inclined section 34. A horizontal section 35 is connected to the rear end of the inclined section 34. A horizontal section 36 is formed on the extension sleeve 25. The horizontal section 36 is connected to the horizontal section 35.

[0032] When the moving platform 10 is located at the rear of the heating furnace 5, the moving rod 22 is located at the third horizontal section 36, and the support plate 15 is at a higher position. Since the third horizontal section 36 is horizontal, the moving rod 22 is less likely to slide within the linear bearing 16. When the moving platform 10 is moved forward, the moving rod 22 moves from the third horizontal section 36 and the second horizontal section 35 into the inclined section 34. Due to the inclined setting of the inclined section 34, the moving rod 22 descends simultaneously during its forward movement, causing the moving platform 10 to descend as well, resulting in the lower end of the pressure rod 9 descending. When the moving rod 22 reaches the connection between the inclined section 34 and the first horizontal section 33, the lower end of the pressure rod 9 contacts the upper surface of the battery 8. The moving platform 10 then moves forward again, bringing the pressure rod 9 to the designated position on the battery 8. This arrangement reduces the contact time between the lower end of the pressure rod 9 and the upper surface of the battery 8, thus reducing friction between them.

[0033] like Figure 5As shown, a contact sensor 44 is installed at the front end of the receiving section 32 corresponding to the horizontal section 33. A lifting mechanism 20 is provided on the support platform 4, and the lifting mechanism 20 drives the guide 21. The contact sensor 44 is electrically connected to the lifting mechanism 20. After the moving rod 22 moves along the horizontal section 33 into the receiving section 32, the moving rod 22 contacts the contact sensor 44. At this time, the lower end of the pressure rod 9 reaches the preset position on the battery 8. The contact sensor 44 can send a signal to the lifting mechanism 20, and the lifting mechanism 20 drives the guide 21 to descend, which causes the receiving section 32 to descend a certain height. The moving rod 22 is located in the middle position of the receiving section 32. At this time, the support plate 15 can be vertically raised and lowered. This allows the pressure rod 9 to rise when the battery 8 heats up and expands, so that the battery 8 will not be subjected to additional pressure.

[0034] The extension sleeve 25 has an installation opening 41 on its side. One end of the installation opening 41 is connected to the side of the extension sleeve 25 near the guide plate 24. A screw 42 is connected to the side of the guide plate 24. The screw 42 passes through the installation opening 41, and a fixing nut 43 is threadedly connected to the part of the screw 42 that passes through the installation opening 41.

[0035] like Figure 6 As shown, when the installed battery 8 is long, the original length of the guide hole 26 will prevent the pressure rod 9 from reaching the preset position on the battery 8. The relative position of the extension sleeve 25 and the guide plate 24 can be adjusted so that the extension sleeve 25 moves backward by one end, thereby increasing the length of the second horizontal section 35. This allows the moving rod 22 to move at the second horizontal section 35 for a longer time, thus allowing the moving platform 10 to maintain its height for a longer period. Subsequently, after the moving rod 22 descends along the inclined section 34, the lower end of the pressure rod 9 can immediately reach the preset position on the battery 8, thereby avoiding excessive contact time between the lower end of the pressure rod 9 and the battery 8, and ensuring that the lower end of the pressure rod 9 can reach the preset position on the battery 8.

[0036] A vertical section 37 is connected to the rear end of the horizontal section 36. A support block 38 is installed inside the vertical section 37. A lifting cylinder 39 is installed on the side of the extension sleeve 25. The lifting cylinder 39 drives a connecting arm 40, which is connected to the side of the support block 38. When the moving platform 10 moves backward, the moving rod 22 can enter the vertical section 37. The vertical section 37 limits the moving rod 22, thereby preventing the moving platform 10 from moving forward or backward, and avoiding accidental movement of the moving platform 10 during battery 8 installation. When movement is required, the lifting cylinder 39 drives the connecting arm 40 to move the support block 38 upward. The support block 38 pushes the moving rod 22 to the height of the horizontal section 36, allowing the moving rod 22 to move into the horizontal section 36, thus enabling the moving platform 10 to move forward or backward.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A constant pressure device for high-temperature testing of fuel cells, characterized in that, The system includes a chassis (1), a heating furnace (5) is mounted on top of the chassis (1), a fixed platform (7) is mounted on the bottom of the heating furnace (5), a support platform (4) is mounted on top of the heating furnace (5), and a movable platform (10) is mounted on top of the support platform (4). The movable platform (10) can move back and forth on the support platform (4). Several fixed seats (17) are mounted on the movable platform (10), and guide shafts (18) are mounted on the fixed seats (17). The guide shafts (18) are vertically arranged, and linear bearings (16) are slidably mounted on the guide shafts (18). A support plate (15) is provided above the movable platform (10), the support plate (15) is mounted on a linear bearing (16), and a pressure rod (9) is installed on the lower part of the support plate (15); a guide (21) is provided on the support platform (4), and a moving rod (22) is rotatably provided on the side of the support plate (15), part of the moving rod (22) is located inside the guide (21); the guide (21) includes a mounting frame (23), a guide plate (24) is fixedly installed in the mounting frame (23), and an extension sleeve (25) is sleeved on the rear side of the guide plate (24). The guide plate (24) and the extension sleeve (25) are provided with guide holes (26), and the moving rod (22) is provided through the guide holes (26); the guide hole (26) includes a receiving section (32) opened on the guide plate (24), the rear side of the receiving section (32) is connected to a horizontal section (33), the horizontal section (33) is connected to the lower rear end of the receiving section (32), the rear end of the horizontal section (33) is connected to an inclined section (34), the height of the rear end of the inclined section (34) is higher than the height of the front end of the inclined section (34), and the inclined section (34) is... The rear end is connected to a horizontal section two (35), and the extension sleeve (25) is provided with a horizontal section three (36). The horizontal section three (36) is connected to the horizontal section two (35). The side of the extension sleeve (25) is provided with an installation opening (41). One end of the installation opening (41) is connected to the side of the extension sleeve (25) near the guide plate (24). The side of the guide plate (24) is connected with a screw (42). The screw (42) passes through the installation opening (41). The part of the screw (42) that passes through the installation opening (41) is threadedly connected to a fixing nut (43).

2. The constant pressure device for high-temperature testing of fuel cells according to claim 1, characterized in that, The heating furnace (5) includes two furnace doors (6), which can be relatively far apart or close together.

3. The constant pressure device for high-temperature testing of fuel cells according to claim 1, characterized in that, The upper part of the chassis (1) is provided with several fixed seats (2), and a support rod (3) is installed on the fixed seat (2). The support rod (3) is vertically arranged, and the upper end of the support rod (3) is connected to the bottom surface of the support platform (4).

4. The constant pressure device for high-temperature testing of fuel cells according to claim 1, characterized in that, The upper part of the support platform (4) is provided with a guide rail (11), which is arranged in the front-back direction. A slider (12) is slidably installed on the guide rail (11), and the slider (12) is fixedly installed at the bottom of the moving platform (10).

5. The constant pressure device for high-temperature testing of fuel cells according to claim 1, characterized in that, A pressure sensor (14) is installed on the lower part of the support plate (15), and a mounting base (13) is installed on the lower part of the pressure sensor (14).

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