Supporting and pre-tightening mechanism for preventing fuel cell stack core collapse

Abstract

The present application relates to hydrogen fuel cell stack technical field, especially to prevent the support pre-tightening mechanism of fuel cell core collapse, be used for supporting the core, including support rod, fixed support leg and silica gel pad, the support rod includes first support rod and second support rod, the fixed support leg includes first fixed support leg and second fixed support leg, the first support rod and second support rod are arranged in parallel interval, and the both ends of first support rod and second support rod are connected first fixed support leg and second fixed support leg through spring positioning column, the silica gel pad is arranged in the side of first support rod and second support rod supporting core, the support pre-tightening mechanism of the present application provides the stable and reliable pre-tightening condition for core, also provides a certain degree of auxiliary reinforcement for shell, guarantees the normal function of fuel cell to play in the structure level.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fuel cell stack technology, and in particular to a support pre-tightening mechanism to prevent the collapse of the fuel cell stack core. Background Technology

[0002] A fuel cell stack is a power generation device that converts chemical energy into electrical energy. Fuel cell stacks do not produce harmful substances during the electrochemical reaction process, and are one of the main directions of new energy vehicle development internationally. As a power source for new energy vehicles, fuel cell vehicles have the advantages of being clean and environmentally friendly, and will become a research hotspot in the automotive field in the future.

[0003] Currently, fuel cell stacks typically consist of dozens to hundreds of individual cells stacked together. When several fuel cells are assembled into a fuel cell stack, pressure must be applied to each cell through end plates and fastening bolts to ensure a good seal between the cells. Simultaneously, the stack needs to be matched with the PACK to meet certain protection requirements, preventing external foreign objects from contacting the stack and causing membrane electrode contamination / insulation problems.

[0004] The existing technology has the following drawbacks:

[0005] (1) Hydrogen fuel cell vehicles are used in a wide range of environments and will generate high-frequency vibrations during operation. In such a vibrating environment, long-core fuel cells will suffer structural collapse due to long-term high-frequency vibrations, which will affect the stability of the fuel cell core and thus affect the normal performance of the fuel cell.

[0006] (2) Existing fuel cell products do not consider the impact of core collapse on fuel cell performance and durability in the absence of special fixing mechanisms for such a large-span core structure.

[0007] (3) Existing fuel cells support the core using a simple long rod structure, without considering the impact of the pressure provided by the support structure on the core. Excessive pressure will damage the core, while insufficient pressure will not provide the necessary support.

[0008] (4) The pre-compression mechanism commonly used in the market has a complex structure and occupies a large space.

[0009] Hydrogen fuel cell stacks are primarily used in commercial vehicles, where road conditions are complex and varied. These changing environments place higher demands on the stability of the fuel cells themselves. Since the fuel cell stack is composed of individual cells stacked together, the high-voltage, high-power requirements of commercial vehicles mean that hundreds of cells are stacked, necessitating a large-span rectangular structure for the fuel cell stack. However, in practical applications, the assembly force at both ends of this unique structure is insufficient to provide a stable and reliable fixation for the stack, especially under long-term high-temperature and high-pressure environments. Combined with the thermal expansion and contraction of materials, this alternating operating environment inevitably leads to varying degrees of collapse in the middle of the rectangular stack over time, affecting the stable operation of the entire stack. Therefore, providing a support and pre-tightening mechanism to prevent fuel cell stack collapse is crucial. Summary of the Invention

[0010] To address the aforementioned problems, the present invention aims to provide a support pre-tightening mechanism to prevent fuel cell core collapse. This mechanism supports the core and includes support rods, fixed supports, and a silicone pad. The support rods include a first support rod and a second support rod, and the fixed supports include a first fixed support and a second fixed support. The first and second support rods are arranged parallel to each other and spaced apart. The two ends of the first and second support rods are respectively connected to the first and second fixed supports via spring positioning pins. The silicone pad is disposed on one side of the first and second support rods supporting the core. The support pre-tightening mechanism of the present invention provides appropriate pre-tightening force to the core to counteract the effects of gravitational deflection. Furthermore, after assembly with the housing, it provides necessary tension to both ends of the housing to counteract the reaction force exerted by the core on the housing after installation. The support pre-tightening mechanism of the present invention provides stable and reliable pre-tightening conditions for the core and also provides a certain degree of auxiliary reinforcement to the housing, ensuring the normal functioning of the fuel cell at the structural level.

[0011] The objective of this invention can be achieved through the following technical solutions:

[0012] This invention provides a support pre-tightening mechanism to prevent fuel cell core collapse, used to support the core, including a support rod, fixed legs and a silicone pad; the support rod includes a first support rod and a second support rod, and the fixed legs include a first fixed leg and a second fixed leg;

[0013] The first support rod and the second support rod are arranged in parallel and spaced apart. The two ends of the first support rod and the second support rod are respectively connected to the first fixed foot and the second fixed foot through spring positioning pins.

[0014] The silicone pad is disposed on one side of the first support rod and the second support rod supporting the core.

[0015] In one embodiment of the present invention, the silicone pad includes a first silicone pad and a second silicone pad;

[0016] The first silicone pad is disposed on one side of the first support rod supporting the core, and the second silicone pad is disposed on one side of the second support rod supporting the core.

[0017] In one embodiment of the present invention, the first silicone pad is bonded to the first support rod.

[0018] In one embodiment of the present invention, the second silicone pad is bonded to the second support rod.

[0019] In one embodiment of the present invention, the spring positioning post includes a first spring positioning post and a second spring positioning post;

[0020] One end of the first support rod and one end of the second support rod are connected to the first fixed support leg through the first spring positioning post and fixed by the first positioning screw;

[0021] The other end is connected to the second fixed leg via the second spring positioning post and is fixed by the second positioning screw.

[0022] In one embodiment of the present invention, a first hole is provided at the position where the first fixed support foot connects to the first support rod and the second support rod; a second hole is provided at the position where the second fixed support foot connects to the first support rod and the second support rod.

[0023] In one embodiment of the present invention, the outer surface of the first positioning screw is provided with a first thread, and the inner surface of the first hole is provided with a second thread that matches the first thread.

[0024] In one embodiment of the present invention, the outer surface of the second positioning screw is provided with a third thread, and the inner surface of the second hole is provided with a fourth thread that matches the third thread.

[0025] In one embodiment of the present invention, the first fixed leg is laterally fixed to the first support rod and the second support rod by a first bolt assembly.

[0026] In one embodiment of the present invention, the second fixed leg is laterally fixed to the first support rod and the second support rod by a second bolt assembly.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention provides a support pre-tightening mechanism to prevent fuel cell core collapse, which solves the negative impact of large-span core structure collapse on stack performance and durability by fixing the structure, expands the application capabilities of long core stacks, and makes the application environment of the stack more extensive. Attached Figure Description

[0029] Figure 1 This is a diagram showing the usage position of a support pre-tightening mechanism for preventing fuel cell core collapse according to the present invention.

[0030] Figure 2 This is a schematic diagram of a support pre-tightening mechanism for preventing fuel cell core collapse according to the present invention;

[0031] Figure 3 This is a schematic diagram of the explosion of components of a support pre-tightening mechanism for preventing the collapse of a fuel cell stack according to the present invention.

[0032] Figure 4 This is a side view of a support pre-tightening mechanism for preventing fuel cell core collapse according to the present invention.

[0033] The following are the labels in the diagram: 1. First fixed support leg; 2. Second fixed support leg; 3. First support rod; 4. Second support rod; 5. First silicone pad; 6. Second silicone pad; 7. First spring positioning post; 8. Second spring positioning post; 9. First positioning screw; 10. Second positioning screw; 11. First bolt assembly; 12. Second bolt assembly; 13. Core; 14. Shell. Detailed Implementation

[0034] This invention provides a support pre-tightening mechanism to prevent fuel cell core collapse, used to support the core, including a support rod, fixed legs and a silicone pad; the support rod includes a first support rod and a second support rod, and the fixed legs include a first fixed leg and a second fixed leg;

[0035] The first support rod and the second support rod are arranged in parallel and spaced apart. The two ends of the first support rod and the second support rod are respectively connected to the first fixed foot and the second fixed foot through spring positioning pins.

[0036] The silicone pad is disposed on one side of the first support rod and the second support rod supporting the core.

[0037] In one embodiment of the present invention, the silicone pad includes a first silicone pad and a second silicone pad;

[0038] The first silicone pad is disposed on one side of the first support rod supporting the core, and the second silicone pad is disposed on one side of the second support rod supporting the core.

[0039] In one embodiment of the present invention, the first silicone pad is bonded to the first support rod.

[0040] In one embodiment of the present invention, the second silicone pad is bonded to the second support rod.

[0041] In one embodiment of the present invention, the spring positioning post includes a first spring positioning post and a second spring positioning post;

[0042] One end of the first support rod and one end of the second support rod are connected to the first fixed support leg through the first spring positioning post and fixed by the first positioning screw;

[0043] The other end is connected to the second fixed leg via the second spring positioning post and is fixed by the second positioning screw.

[0044] In one embodiment of the present invention, a first hole is provided at the position where the first fixed support foot connects to the first support rod and the second support rod; a second hole is provided at the position where the second fixed support foot connects to the first support rod and the second support rod.

[0045] In one embodiment of the present invention, the outer surface of the first positioning screw is provided with a first thread, and the inner surface of the first hole is provided with a second thread that matches the first thread.

[0046] In one embodiment of the present invention, the outer surface of the second positioning screw is provided with a third thread, and the inner surface of the second hole is provided with a fourth thread that matches the third thread.

[0047] In one embodiment of the present invention, the first fixed leg is laterally fixed to the first support rod and the second support rod by a first bolt assembly.

[0048] In one embodiment of the present invention, the second fixed leg is laterally fixed to the first support rod and the second support rod by a second bolt assembly.

[0049] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0050] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0053] Example 1

[0054] This embodiment provides a support pre-tightening mechanism to prevent fuel cell core collapse, such as... Figure 1-4As shown, the support for the reactor core 13 includes support rods, fixed feet, and silicone pads. The support rods include a first support rod 3 and a second support rod 4, and the fixed feet include a first fixed foot 1 and a second fixed foot 2. The first support rod 3 and the second support rod 4 are arranged parallel to each other, and their two ends are connected to the first fixed foot 1 and the second fixed foot 2 respectively via spring positioning posts. The spring positioning posts include a first spring positioning post 7 and a second spring positioning post 8. One end of each of the first support rod 3 and the second support rod 4 is connected to the first fixed foot 1 via the first spring positioning post 7 and fixed with a first positioning screw 9, while the other end is connected to the second fixed foot 2 via the second spring positioning post 8 and fixed with a second positioning screw 10. A first hole is provided at the connection point between the first fixed foot 1 and the first support rod 3 or the second support rod 4. The second fixed foot 2 is connected to the first support rod 3... A second hole is provided at the connection position of the second support rod 4; the outer surface of the first positioning screw 9 is provided with a first thread, and the inner surface of the first hole is provided with a second thread that matches the first thread; the outer surface of the second positioning screw 10 is provided with a third thread, and the inner surface of the second hole is provided with a fourth thread that matches the third thread; the first fixed support leg 1 is laterally fixed to the first support rod 3 and the second support rod 4 by the first bolt assembly 11, and the second fixed support leg 2 is laterally fixed to the first support rod 3 and the second support rod 4 by the second bolt assembly 12; a silicone pad is provided on one side of the first support rod 3 and the second support rod 4 supporting the core 13, and the silicone pad includes a first silicone pad 5 and a second silicone pad 6; the first silicone pad 5 is provided on one side of the first support rod 3 supporting the core 13 and is bonded to the first support rod 3, and the second silicone pad 6 is provided on one side of the second support rod 4 supporting the core 13 and is bonded to the second support rod 4.

[0055] During the assembly process, the first support rod 3 and the second support rod 4 use spring positioning columns to provide a pre-tightening support force, and then tighten the first positioning screw 9, the second positioning screw 10, the first bolt assembly 11 and the second bolt assembly 12 to ensure the controllability of the force on the fuel cell core 13 and reduce the risk of damage to the core 13 due to the assembly of structural components.

[0056] The first silicone pad 5 and the second silicone pad 6 serve to insulate the reactor core 13 and buffer the force. The support pre-tightening structure in this embodiment can provide a force of 5kg-6kg to the reactor core 13.

[0057] The support pre-tightening mechanism of this embodiment can provide appropriate pre-tightening force to the core 13 to counteract the effect of deflection caused by gravity; and after assembly with the shell 14, it can also provide necessary tension to both ends of the shell 14 to counteract the reaction force of the core 13 on the shell 14 after installation. The support pre-tightening mechanism of this embodiment provides stable and reliable pre-tightening conditions for the core 13, and also provides a certain degree of auxiliary reinforcement for the shell 14, ensuring the normal functioning of the fuel cell at the structural level.

[0058] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the interpretation of the present invention, without departing from the scope of the invention, should be within the protection scope of the present invention.

Claims

1. A support pre-tightening mechanism for preventing fuel cell core collapse, used to support the core (13), characterized in that, It includes a support rod, a fixed foot, and a silicone pad; the support rod includes a first support rod (3) and a second support rod (4), and the fixed foot includes a first fixed foot (1) and a second fixed foot (2); The first support rod (3) and the second support rod (4) are arranged in parallel and spaced apart. The two ends of the first support rod (3) and the second support rod (4) are respectively connected to the first fixed support foot (1) and the second fixed support foot (2) through spring positioning pins. The silicone pad is disposed on one side of the first support rod (3) and the second support rod (4) supporting the core (13); The silicone pad includes a first silicone pad (5) and a second silicone pad (6); The first silicone pad (5) is disposed on one side of the first support rod (3) supporting the core (13), and the second silicone pad (6) is disposed on one side of the second support rod (4) supporting the core (13); The spring positioning post includes a first spring positioning post (7) and a second spring positioning post (8); One end of the first support rod (3) and the second support rod (4) is connected to the first fixed support leg (1) through the first spring positioning post (7) and fixed by the first positioning screw (9); The other end is connected to the second fixed leg (2) via the second spring positioning post (8) and fixed by the second positioning screw (10); The support preload mechanism can provide appropriate preload to the reactor core to counteract the effects of gravitational deflection; and after assembly with the shell, it can also provide necessary tension to both ends of the shell to counteract the reaction force exerted by the reactor core on the shell after installation.

2. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 1, characterized in that, The first silicone pad (5) is bonded to the first support rod (3).

3. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 1, characterized in that, The second silicone pad (6) is bonded to the second support rod (4).

4. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 1, characterized in that, A first hole is provided at the position where the first fixed support leg (1) is connected to the first support rod (3) and the second support rod (4); a second hole is provided at the position where the second fixed support leg (2) is connected to the first support rod (3) and the second support rod (4).

5. A support pre-tightening mechanism for preventing fuel cell core collapse according to claim 4, characterized in that, The outer surface of the first positioning screw (9) is provided with a first thread, and the inner surface of the first hole is provided with a second thread that matches the first thread.

6. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 4, characterized in that, The outer surface of the second positioning screw (10) is provided with a third thread, and the inner surface of the second hole is provided with a fourth thread that matches the third thread.

7. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 1, characterized in that, The first fixed support leg (1) is laterally fixed to the first support rod (3) and the second support rod (4) by the first bolt assembly (11).

8. The support pre-tightening mechanism for preventing fuel cell core collapse according to claim 7, characterized in that, The second fixed support leg (2) is laterally fixed to the first support rod (3) and the second support rod (4) by the second bolt assembly (12).

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