Limiting structure for fuel cell stack
By designing an adjustable limiting structure, the problem of insufficient adaptability of the existing fuel cell stack limiting structure is solved, stable limiting of fuel cell stacks of different sizes and heights is achieved, and the flexibility and stability of the device are improved.
Patent Information
- Application Number
- CN202422477085.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-14
AI Technical Summary
The existing fuel cell stack limiting structure cannot adapt to fuel cell stacks of different sizes, resulting in limited usage scenarios and reduced flexibility of the device.
A limiting structure including a base plate, a mounting seat, a hydraulic rod, a limiting rod, a partition, a rotating plate and an adjustment assembly is designed. The hydraulic rod drives the partition to adjust the distance, the rotating plate adjusts the partition position, and the adjustment assembly adjusts the height to achieve the limitation of fuel cell stacks of different sizes and heights.
Flexible positioning of fuel cell stacks of different sizes and heights is achieved, which enhances the adaptability and stability of the device and prevents components from loosening or dislocation due to thermal expansion or external forces.
Smart Images
Figure CN223401636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, in particular to a limiting structure for a fuel cell stack. Background Art
[0002] During the assembly of a fuel cell stack, retaining structures are used to maintain accurate alignment of key components such as individual cells, separators, and membrane electrode assemblies (MEAs). Retaining plates, guide grooves, or guide rods provide positioning during this stage, ensuring that each component is correctly aligned within the stack according to design requirements and preventing misalignment or displacement during installation. During fuel cell operation, internal components may expand due to heat generated by electrochemical reactions. Retaining structures absorb the stress caused by this thermal expansion through elastic elements (such as springs or rubber pads), preventing component deformation or misalignment and ensuring the proper operation of the stack.
[0003] However, some of the existing limiting structures for fuel cell stacks, when in use, usually apply uniform pressure to components such as single cells, partitions, and seals to prevent these components from moving laterally or vertically during the operation of the stack. However, this does not take into account that fuel cell stacks cannot be limited by adjusting the distance between seals due to different models and sizes, which will limit the use scenarios of the device and reduce the flexibility of the device. Therefore, a limiting structure for fuel cell stacks is proposed to solve the above problems. Utility Model Content
[0004] In order to remedy the above deficiencies, the present invention provides a limiting structure for a fuel cell stack, aiming to improve the problem in the prior art that fuel cell stacks of different sizes cannot be limited.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] The limiting structure for a fuel cell stack comprises a base plate, a mounting seat is fixedly connected to the top left side of the base plate, a driving assembly for providing power to the device is fixedly connected to the top of the base plate, a baffle is fixedly connected to the top of the base plate, the front and rear sides of the inner part of the baffle are fixedly connected to the limiting rod, the outer part of the limiting rod is slidably connected to a plurality of partitions, the bottoms of the plurality of partitions are fixedly connected to a fixed shaft 1, the outer part of the fixed shaft 1 is rotatably connected to two rotating plates 2, the outer parts of the plurality of rotating plates 2 are rotatably connected to a rotating ring 1, the middle end of the bottom right side of the baffle is fixedly connected to a fixed shaft 2, the outer part of the fixed shaft 2 is rotatably connected to the rotating plate 1, and the left side of the rotating plate 1 is rotatably connected to the rotating ring 2;
[0007] As a further description of the above technical solution:
[0008] The driving assembly includes a hydraulic rod, the bottom of which is fixedly connected to the top of the mounting seat, and the left side of one of the partitions is fixedly connected to the output end of the hydraulic rod;
[0009] As a further description of the above technical solution:
[0010] The four corners of the top of the base plate are fixedly connected to adjustment assemblies for adjusting the height of the device according to the height of the fuel cell stack, the tops of the four adjustment assemblies are threadedly connected to pressure plates, the tops of the four adjustment assemblies are slidably connected to cover plates, the tops of the four adjustment assemblies are slidably connected to sliding plates, and the outsides of the four adjustment assemblies are sleeved with springs;
[0011] As a further description of the above technical solution:
[0012] The right side of one of the rotating plates 2 is rotatably connected to the outside of the rotating ring 2, and the front and rear sides of the plurality of partitions are in contact with the front and rear inner walls of the baffle;
[0013] As a further description of the above technical solution:
[0014] The bottoms of the plurality of partitions are in contact with the top of the bottom plate, and the bottoms of the plurality of rotating rings are in contact with the top of the bottom plate;
[0015] As a further description of the above technical solution:
[0016] One end of the spring is fixedly connected to the bottom of the sliding plate, and the other end of the spring is fixedly connected to the top of the bottom plate;
[0017] As a further description of the above technical solution:
[0018] The bottom of the pressure plate contacts the top of the cover plate, and the top of the sliding plate contacts the bottom of the cover plate;
[0019] As a further description of the above technical solution:
[0020] The adjustment assembly includes four studs, the bottoms of the four studs are respectively fixedly connected to the four corners of the top of the base plate, the outside of the cover plate is slidably connected to the tops of the four studs, the middle part of the pressure plate is threadedly connected to the outside of the studs, the middle part of the sliding plate is slidably connected to the outside of the studs, and the spring is sleeved on the outside of the studs.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the present invention, by starting the hydraulic rod, the output end of the hydraulic rod can drive one of the partitions to move, and then one of the partitions will drive the remaining partitions to move through the cooperation of the rotating plate 2 and the rotating ring 1 during the movement, so that the distance between the partitions can be adjusted according to the size of the fuel cell stack, and the partitions can limit the fuel cell stacks of different sizes, thereby increasing the flexibility of the device.
[0023] 2. In the present invention, by rotating the pressure plate, the pressure plate can drive the cover plate to descend outside the stud. When the cover plate descends to a certain distance, the bottom of the cover plate contacts the top of the fuel cell stack, so that the device can clamp and fix fuel cell stacks of different heights. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a three-dimensional schematic diagram of the limiting structure for a fuel cell stack proposed in the present invention;
[0025] Figure 2 This is a schematic structural diagram of a baffle for a limiting structure of a fuel cell stack proposed in the present invention;
[0026] Figure 3 This is a schematic structural diagram of a limiting rod for a limiting structure of a fuel cell stack proposed in the present invention;
[0027] Figure 4 for Figure 1 Enlarged view of point A.
[0028] Legend:
[0029] 1. Base plate; 2. Mounting seat; 3. Hydraulic rod; 4. Baffle; 5. Limit rod; 6. Partition; 7. Fixed shaft 1; 8. Rotating ring 1; 9. Fixed shaft 2; 10. Rotating plate 1; 11. Rotating ring 2; 12. Stud; 13. Pressure plate; 14. Cover plate; 15. Sliding plate; 16. Spring; 17. Rotating plate 2. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] Reference Figures 1 to 3The present invention provides an embodiment of a position limiting structure for a fuel cell stack, comprising a base plate 1. Base plate 1 is the foundation structure of the entire device, providing firm support and ensuring stability during use. The top of base plate 1 is used to mount and secure other components, ensuring the entire device remains balanced and stable during operation. A mounting bracket 2 is fixedly connected to the left side of the top of base plate 1, securing the drive assembly to prevent displacement or shaking during operation. The design of the mounting base 2 takes into account the load capacity and stability requirements of the drive assembly. The top of the mounting base 2 is fixedly connected to a drive assembly for providing power to the device. The top of the base plate 1 is fixedly connected to a baffle 4. The front and rear sides of the inner part of the baffle 4 are fixedly connected to the limit rod 5. The outer part of the limit rod 5 is slidably connected to multiple partitions 6. The baffle 4 provides support and restriction for the limit rod 5 and the partition 6 to prevent the partition 6 from deviating from the predetermined track during the sliding process. The limit rod 5 provides a sliding path for the partition 6 to ensure that the partition 6 slides along the set direction during the adjustment process to prevent offset or misalignment. The drive assembly includes a hydraulic rod 3. The bottom of the hydraulic rod 3 is fixedly connected to the top of the mounting base 2. The left side of one of the partitions 6 is fixedly connected to the output end of the hydraulic rod 3. The hydraulic rod 3 is the power source of the device. The movement of its output end controls the adjustment of the limit structure to ensure that the distance between the partitions 6 is adapted to fuel cell stacks of different sizes.
[0032] The partition 6 can achieve limit adjustment for fuel cell stacks of different sizes by sliding. The position of the partition 6 can be precisely adjusted according to the size of the fuel cell stack to ensure that the stack is firmly fixed and supported during operation. The bottoms of multiple partitions 6 are fixedly connected to a fixed shaft 7. The fixed shaft 7 serves as a support shaft for the partition 6 to ensure that the partition 6 slides smoothly and stably on the limit rod 5. The external rotation of the fixed shaft 7 is connected to two rotating plates 2 17. The rotating plate 2 17 adjusts the distance between the partitions 6 by rotating when the device is running to ensure that it adapts to the requirements of fuel cell stacks of different sizes. The external parts of multiple rotating plates 2 17 are rotatably connected to a rotating ring 1 8. The rotating ring 1 8 is used in conjunction with the rotating plate 2 17 to drive all partitions 6 to move at the same time during the adjustment process to ensure that the distance between the partitions 6 is uniform and the bottoms of multiple partitions 6 are aligned with the top of the bottom plate 1. The bottom of the plurality of rotating rings 8 is in contact with the top of the bottom plate 1, and the middle end of the bottom right side of the baffle 4 is fixedly connected with a fixed shaft 29, and the outer rotation of the fixed shaft 29 is connected with a rotating plate 10, and the fixed shaft 29 provides a fulcrum for the movement of the rotating plate 10 to ensure that the rotating plate 10 can stably drive the partition 6 to adjust during the movement, and the left side of the rotating plate 10 is rotatably connected with a rotating ring 2 11, and the rotating plate 10 drives the rotating plate 2 17 and the partition 6 to move synchronously by connecting to the rotating ring 2 11, so as to realize the overall adjustment of the limiting structure, and the right side of one rotating plate 2 17 is rotatably connected to the outside of the rotating ring 2 11, and the front and rear sides of the plurality of partitions 6 are in contact with the front and rear inner walls of the baffle 4, and the rotating ring 2 11 further cooperates with the movement of the rotating plate 2 17 by rotation, so that the partition 6 keeps sliding synchronously during the adjustment process;
[0033] Reference Figure 1 and Figure 4 Adjustment assemblies for adjusting the height of the device according to the height of the fuel cell stack are fixedly connected to the four corners of the top of the base plate 1. Pressure plates 13 are threadedly connected to the top of each of the four adjustment assemblies. The pressure plates 13 adjust the contact pressure with the top of the fuel cell stack by rotation, ensuring that the stack is subjected to uniform vertical pressure to prevent loosening and displacement. A cover plate 14 is slidably connected to the top of the four adjustment assemblies. The cover plate 14 can be adjusted in height under the action of the pressure plates 13. After being adjusted to the appropriate height, the cover plate 14 contacts the top of the fuel cell stack, limiting the vertical position of the stack.
[0034] The tops of the four adjustment components are all slidably connected with a sliding plate 15. The sliding plate 15 absorbs external impacts through elastic deformation to prevent the stack from loosening or dislocation when subjected to external force. The adjustment component includes four studs 12. The adjustment component adjusts the overall height of the device through the rotation and sliding of the studs 12 to ensure that it can adapt to fuel cell stacks of different heights. The bottoms of the four studs 12 are respectively fixedly connected to the top four corners of the base plate 1, the outside of the cover plate 14 is slidably connected to the top of the four studs 12, the middle part of the pressure plate 13 is threadedly connected to the outside of the studs 12, and the middle of the sliding plate 15 is screwed to the outside of the studs 12. The four adjusting components are all slidably connected to the outside of the stud 12, and the spring 16 is sleeved on the outside of the stud 12. The bottom of the pressure plate 13 contacts the top of the cover plate 14, and the top of the sliding plate 15 contacts the bottom of the cover plate 14. The outside of the four adjusting components is sleeved with a spring 16, one end of the spring 16 is fixedly connected to the bottom of the sliding plate 15, and the other end of the spring 16 is fixedly connected to the top of the base plate 1. The spring 16 provides elastic support so that the device has appropriate room for movement when clamping the fuel cell stack, ensuring that the stack will not be damaged or displaced due to thermal expansion or external impact.
[0035] Working principle: When it is necessary to limit the fuel cell stack, the hydraulic rod 3 can be started according to the size of the fuel cell stack, so that the output end of the hydraulic rod 3 drives one of the partitions 6 to move, so that the partition 6 will drive the fixed shaft 1 7 to move when it moves, and then the fixed shaft 1 7 will drive the rotating plate 2 17 to rotate outside the rotating ring 1 8 when it moves, and then the fixed shaft 1 7 will drive the remaining multiple partitions 6 to slide together outside the two limiting rods 5 through the cooperation of the rotating plate 2 17 and the rotating ring 1 8, and through the rotation connection between one of the rotating plates 2 17 and the rotating ring 2 11, the rotating plate 2 17 will drive the rotating ring 2 11 to move when it moves, and the rotating ring 2 11 will drive the rotating plate 10 to move when it moves, and then the rotating plate 10 will rotate outside the fixed shaft 2 9, and then because the bottom of the fixed shaft 2 9 is fixed to the middle end of the bottom right side of the baffle 4, the fixed shaft 2 9 can limit the multiple moving partitions 6.
[0036] Then, when the distance between the multiple separators 6 is appropriate, the fuel cell stack can be placed in the gaps between the multiple separators 6 in sequence, so that the separators 6 limit the position of the fuel cell stack, thereby enabling the device to limit the position of fuel cell stacks of different sizes.
[0037] When the fuel cell stack is placed, the pressure plate 13 can be rotated to move the pressure plate 13 outside the stud 12, so that the pressure plate 13 will press the cover plate 14 when moving, so that the cover plate 14 slides outside the stud 12, and then the cover plate 14 presses the sliding plate 15 when moving, and then the sliding plate 15 compresses the spring 16, so that when the cover plate 14 moves to the appropriate position, the bottom of the cover plate 14 will contact the top of the fuel cell stack, so that the device limits the height of the fuel cell stack, and through the setting of the spring 16, a part of the movable space can be left, thereby ensuring that the internal components of the stack will not loosen or dislocate when subjected to external impact or thermal expansion.
[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A limiting structure for a fuel cell stack, comprising a base plate (1), characterized in that: The top left side of the bottom plate (1) is fixedly connected to a mounting seat (2), the top of the mounting seat (2) is fixedly connected to a driving assembly for providing power to the device, the top of the bottom plate (1) is fixedly connected to a baffle (4), the inner front and rear sides of the baffle (4) are fixedly connected to a limit rod (5), the outer side of the limit rod (5) is slidably connected to a plurality of partitions (6), the bottoms of the plurality of partitions (6) are fixedly connected to a fixed shaft 1 (7), the outer side of the fixed shaft 1 (7) is rotatably connected to two rotating plates 2 (17), the outer sides of the plurality of rotating plates 2 (17) are rotatably connected to a rotating ring 1 (8), the middle end of the bottom right side of the baffle (4) is fixedly connected to a fixed shaft 2 (9), the outer side of the fixed shaft 2 (9) is rotatably connected to a rotating plate 1 (10), and the left side of the rotating plate 1 (10) is rotatably connected to a rotating ring 2 (11).
2. The limiting structure for a fuel cell stack according to claim 1, characterized in that: The drive assembly comprises a hydraulic rod (3), the bottom of the hydraulic rod (3) is fixedly connected to the top of the mounting seat (2), and the left side of one of the partitions (6) is fixedly connected to the output end of the hydraulic rod (3).
3. The limiting structure for a fuel cell stack according to claim 1, characterized in that: The four corners of the top of the base plate (1) are fixedly connected to adjustment components for adjusting the height of the device according to the height of the fuel cell stack, the tops of the four adjustment components are threadedly connected to pressure plates (13), the tops of the four adjustment components are slidably connected to cover plates (14), the tops of the four adjustment components are slidably connected to sliding plates (15), and the outsides of the four adjustment components are sleeved with springs (16).
4. The limiting structure for a fuel cell stack according to claim 1, characterized in that: The right side of one of the rotating plates (17) is rotatably connected to the outside of the rotating ring (11), and the front and rear sides of the plurality of partitions (6) are in contact with the front and rear inner walls of the baffle (4).
5. The limiting structure for a fuel cell stack according to claim 1, characterized in that: The bottoms of the plurality of partitions (6) are in contact with the top of the bottom plate (1), and the bottoms of the plurality of rotating rings (8) are in contact with the top of the bottom plate (1).
6. The limiting structure for a fuel cell stack according to claim 3, characterized in that: One end of the spring (16) is fixedly connected to the bottom of the sliding plate (15), and the other end of the spring (16) is fixedly connected to the top of the bottom plate (1).
7. The limiting structure for a fuel cell stack according to claim 3, characterized in that: The bottom of the pressure plate (13) contacts the top of the cover plate (14), and the top of the sliding plate (15) contacts the bottom of the cover plate (14).
8. The limiting structure for a fuel cell stack according to claim 3, characterized in that: The adjustment assembly includes four studs (12), the bottoms of the four studs (12) are fixedly connected to the four corners of the top of the base plate (1), the outside of the cover plate (14) is slidably connected to the tops of the four studs (12), the middle of the pressure plate (13) is threadedly connected to the outside of the studs (12), the middle of the sliding plate (15) is slidably connected to the outside of the studs (12), and the spring (16) is sleeved on the outside of the studs (12).