Electric pile of fuel cell and buffer structure of electric pile
By adopting the structure of core, end plate, tie rod and buffer pad in the fuel cell stack, the vibration absorption effect of the buffer pad reduces the displacement of the bipolar plate and membrane electrode, and solves the failure of the fuel cell under vibration conditions. risk, achieving higher stability and reliability.
Patent Information
- Application Number
- CN202420362950.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-27
AI Technical Summary
Under vibration conditions, the bipolar plate and membrane electrode are prone to displacement, resulting in the flow or leakage of the core fluid, increasing the risk of failure.
A fuel cell stack buffer structure is designed, including a core, end plate, a tie rod and a buffer pad. The tie rod is pressed on the outer surface of the core through the buffer pad, providing vibration absorption buffer to reduce the displacement of the bipolar plate and membrane electrodes.
It effectively reduces the displacement of the bipolar plate and membrane electrodes of the fuel cell stack under vibration conditions, reduces the possibility of failure, and provides stability through the vibration absorption of the buffer pad.
Smart Images
Figure CN222190827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery stacks, in particular to a battery stack of a fuel cell and a buffer structure thereof. Background Art
[0002] The fuel cell stack core includes stacked bipolar plates and membrane electrodes, which are restrained by friction and tension. However, when the fuel cell is in a vibrating condition, the bipolar plates and membrane electrodes are easily displaced due to impact, vibration, and gravity. When the bipolar plates and membrane electrodes are seriously misaligned, various fluids in the core will flow or leak, causing the fuel cell to malfunction. Utility Model Content
[0003] The purpose of the utility model is to provide a fuel cell stack and a buffer structure thereof, which can reduce the displacement of bipolar plates and membrane electrodes and reduce the possibility of fuel cell failure.
[0004] In order to achieve the above object, the utility model provides a buffer structure of a fuel cell stack, comprising:
[0005] Core;
[0006] Two end plates are provided and are respectively arranged at two ends of the core;
[0007] A pull rod, two ends of which are respectively connected to the two end plates;
[0008] A buffer pad is arranged between the tie rod and the core, and the tie rod is pressed against the outer surface of the core through the buffer pad.
[0009] In some embodiments of the present application:
[0010] The buffer pad is bonded to the pull rod.
[0011] In some embodiments of the present application:
[0012] The tie rod has a pressing plane disposed toward the core, the buffer pad is disposed between the pressing plane and the core, and the pressing plane is pressed against the outer surface of the core through the buffer pad.
[0013] In some embodiments of the present application:
[0014] The end plate is provided with a first connection portion, and both ends of the pull rod are provided with second connection portions, and the first connection portion is connected to the second connection portion.
[0015] In some embodiments of the present application:
[0016] The first connection portion is formed at an edge of the end plate, and the first connection portion protrudes from a surface of the core.
[0017] In some embodiments of the present application:
[0018] The first connection portion and the second connection portion are bolted to each other.
[0019] In some embodiments of the present application:
[0020] The outer surface of the core includes a first side surface and a second side surface that are oppositely disposed. The buffer pads are provided in a plurality and are respectively disposed on the first side surface and the second side surface.
[0021] In some embodiments of the present application:
[0022] An area of the first side surface is greater than an area of the second side surface, and a number of the buffer pads on the first side surface is greater than a number of the buffer pads on the second side surface.
[0023] The utility model also provides a fuel cell stack, comprising the buffer structure of the fuel cell stack as described in any of the above paragraphs.
[0024] The utility model provides a fuel cell stack and a buffer structure thereof, which have the following beneficial effects compared with the prior art:
[0025] The buffer structure of the fuel cell stack of the utility model comprises: a core; two end plates, which are respectively arranged at the two ends of the core; a tie rod, the two ends of which are respectively connected to the two end plates; a buffer pad, which is arranged between the tie rod and the core, and the tie rod is pressed against the outer surface of the core through the buffer pad. With such a structure, when the fuel cell stack is vibrated, the displacement of the bipolar plate and the membrane electrode of the core can be reduced, and it can also play a role of vibration absorption and buffering, reducing the possibility of failure of the fuel cell.
[0026] The fuel cell stack of the utility model includes the above-mentioned buffer structure. When the fuel cell stack is subjected to vibration, the displacement of the bipolar plates and membrane electrodes of the stack core can be reduced, and the structure can also play a role in vibration absorption and buffering, thereby reducing the possibility of fuel cell failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a disassembly diagram of the buffer structure of an embodiment of the utility model.
[0028] Figure 2 It is a top view of the buffer structure of an embodiment of the utility model.
[0029] Figure 3 yes Figure 1 Cross-sectional view at point A.
[0030] In the figure, 1, core; 2, end plate; 3, tie rod; 4, buffer pad; 11, first side; 12, second side; 21, first connecting part; 31, second connecting part. DETAILED DESCRIPTION
[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.
[0035] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0036] Please refer to Figure 1 As shown, a buffer structure of a fuel cell stack according to a preferred embodiment of the utility model comprises: a stack core 1, an end plate 2, a tie rod 3 and a buffer pad 4.
[0037] The core 1 includes bipolar plates and membrane electrodes, and the bipolar plates and membrane electrodes are stacked.
[0038] Two end plates 2 are provided and are respectively disposed at both ends of the core 1 .
[0039] The two ends of the tie rod 3 are respectively connected to the two end plates 2 , and the tension rod 3 is provided to maintain the pressing force of the end plates 2 on the core 1 .
[0040] The buffer pad 4 is arranged between the tie rod 3 and the core 1, and the tie rod 3 is pressed against the outer surface of the core 1 through the buffer pad 4. The buffer pad 4 is deformed under pressure and plays a role of vibration absorption and buffering.
[0041] In the prior art, the tie rod 3 and the core 1 do not contact each other, and there is a gap between them. The buffer pad 4 of this embodiment fills the gap, and when the buffer pad 4 is not under pressure, the thickness of the buffer pad 4 is greater than the gap value. Therefore, in this embodiment, the buffer pad 4 is installed on the core 1 and deforms under pressure, playing a role of vibration absorption and buffering.
[0042] In addition, since the pull rod 3 is pressed against the outer surface of the core 1 through the buffer pad 4, when the fuel cell stack is vibrated, the displacement of the bipolar plates and membrane electrodes of the core 1 can be reduced, thereby reducing the possibility of fuel cell failure.
[0043] In some embodiments, the buffer pad 4 is bonded to the pull rod 3 .
[0044] The material of the buffer pad 4 can be a material with vibration absorption and buffering function such as silicone foam.
[0045] The surface of the buffer pad 4 contacting the pull rod 3 is provided with adhesive, and the buffer pad 4 and the pull rod 3 are connected together by the adhesive, so that the buffer pad 4 and the pull rod 3 are bonded. This arrangement can make the buffer structure easy to install.
[0046] The tie rod 3 has a pressing plane disposed toward the core 1, and the buffer pad 4 is disposed between the pressing plane and the core 1, and the pressing plane is pressed against the outer surface of the core 1 through the buffer pad 4. The setting of the pressing plane can make the buffer pad 4 evenly stressed, so as to better play the role of vibration absorption and buffering.
[0047] For details, please refer to Figure 2 and Figure 3 The cross section of the pull rod 3 is "T" shaped, and the pressing plane is arranged at the "-" position of the pull rod 3 so that the pull rod 3 and the buffer pad 4 are in contact through the pressing plane.
[0048] In some embodiments, a first connection portion 21 is disposed on the end plate 2 , and second connection portions 31 are disposed at both ends of the pull rod 3 , and the first connection portion 21 is connected to the second connection portion 31 .
[0049] The first connection part 21 is block-shaped, formed at the edge of the end plate 2, and protruding from the surface of the core 1. The first connection part 21 is integrally provided with the end plate 2.
[0050] The second connection part 31 is also block-shaped, and corresponds to the first connection part 21. The first connection part 21 and the second connection part 31 are bolted to each other. Threaded holes are provided on the first connection block and the second connection block to form a bolt connection between the two.
[0051] The outer surface of the core 1 includes a first side surface 11 and a second side surface 12 that are oppositely disposed. The number of the buffer pads 4 is set to be multiple and are respectively disposed on the first side surface 11 and the second side surface 12 .
[0052] In this embodiment, the number of buffer pads 4 and tie rods 3 is the same, and the buffer pads 4 and tie rods 3 are arranged correspondingly. The core 1 is in a rectangular shape, and the buffer pads 4 and tie rods 3 surround the outside of the core 1. The bipolar plates and membrane electrodes can be constrained whether on the first side 11 or the second side 12, which can better reduce the displacement of the bipolar plates and membrane electrodes of the core 1 and reduce the possibility of fuel cell failure.
[0053] The area of the first side surface 11 is greater than the area of the second side surface 12 , and the number of the buffer pads 4 on the first side surface 11 is greater than the number of the buffer pads 4 on the second side surface 12 .
[0054] In this embodiment, four buffer pads 4 are provided on each first side surface 11, and one buffer pad 4 is provided on each second side surface 12. In other embodiments, the buffer pads 4 can be provided according to actual needs.
[0055] During assembly, the buffer pad 4 is first bonded to the tie rod 3, and then an end plate 2 is placed horizontally, and then the bipolar plates and membrane electrodes are stacked to form a core 1. After the second end plate 2 is placed on top, a pressing force is applied to the end plate placed later, and the core 1 is subjected to uniform and appropriate pressure. Then, the tie rod 3 is installed on the end plate 2, and the buffer pad 4 is pressed against the surface of the core 1. After installation, the buffer pad 4 is in a deformed state, and when the stack core 11 is vibrated, the displacement of the bipolar plates and membrane electrodes is reduced, and it can also play a role in vibration absorption and buffering.
[0056] This embodiment also provides a fuel cell stack, including the above-mentioned buffer structure. When the fuel cell stack is subjected to vibration, it can reduce the displacement of the bipolar plates and membrane electrodes of the stack core 1, and can also play a role in vibration absorption and buffering, thereby reducing the possibility of fuel cell failure.
[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A buffer structure for a fuel cell stack, characterized in that: include: Core; Two end plates are provided and are respectively arranged at two ends of the core; A pull rod, two ends of which are respectively connected to the two end plates; A buffer pad is arranged between the tie rod and the core, and the tie rod is pressed against the outer surface of the core through the buffer pad.
2. The buffer structure of the fuel cell stack according to claim 1, characterized in that: The buffer pad is bonded to the pull rod.
3. The buffer structure of the fuel cell stack according to claim 1, characterized in that: The tie rod has a pressing plane disposed toward the core, the buffer pad is disposed between the pressing plane and the core, and the pressing plane is pressed against the outer surface of the core through the buffer pad.
4. The buffer structure of the fuel cell stack according to claim 1, characterized in that: The end plate is provided with a first connection portion, and both ends of the pull rod are provided with second connection portions, and the first connection portion is connected to the second connection portion.
5. The buffer structure of the fuel cell stack according to claim 4, characterized in that: The first connection portion is formed at an edge of the end plate, and the first connection portion protrudes from a surface of the core.
6. The buffer structure of the fuel cell stack according to claim 4, characterized in that: The first connection portion and the second connection portion are bolted to each other.
7. The buffer structure of the fuel cell stack according to claim 1, characterized in that: The outer surface of the core includes a first side surface and a second side surface that are oppositely disposed. The buffer pads are provided in a plurality and are respectively disposed on the first side surface and the second side surface.
8. The buffer structure of the fuel cell stack according to claim 7, characterized in that: An area of the first side surface is greater than an area of the second side surface, and a number of the buffer pads on the first side surface is greater than a number of the buffer pads on the second side surface.
9. A fuel cell stack, characterized in that: A buffer structure for a fuel cell stack comprising the fuel cell stack as described in any one of claims 1 to 8.