High-binding-force plastic-coated end plate for fuel cell

Abstract

The utility model relates to the technical field of end plates, in particular to a high-binding-force plastic-coated end plate for a fuel cell, which comprises a metal cover plate and a PPS (polyphenylene sulfite) resin end plate, the surface of the metal cover plate is processed into a micro-nano structure by laser, the PPS resin end plate is coated with a plastic, and the metal cover plate and the PPS resin end plate form the end plate of the PPS plastic-coated metal cover plate; an embedded groove is formed in the middle of the PPS resin end plate, cavity opening structures are formed in the two sides of the PPS resin end plate, and an open groove is formed in one side of the embedded groove. According to the utility model, the physical binding force of the PPS resin end plate and the metal cover plate can be increased, the problem of insufficient binding force of metal and nonmetal interfaces is solved, and the air tightness of a fuel cell system is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of end plates, specifically to a high-bonding plastic-coated end plate for fuel cells. Background Technology

[0002] Fuel cell end plates are key components in fuel cell stacks. They are typically located at both ends of the stack and their main functions are to provide structural support, apply pressure evenly to ensure good contact, and protect the membrane electrode assembly from chemical corrosion. The design and optimization of end plates are crucial to the performance, stability, and lifespan of fuel cells.

[0003] To improve the performance of fuel cells, the end plates of the fuel cells need to be coated with plastic to improve their corrosion resistance, electrical insulation, mechanical strength, and overall reliability.

[0004] The existing technology still has the following areas for improvement: PPS parts are used in plastic coating or nesting with metal parts. Due to the poor bonding ability between PPS and metal, and the large difference in the coefficients of thermal expansion between metal and non-metal, long-term use may lead to separation of metal and non-metal parts, which will affect the airtightness of the entire fuel cell system. Using a nested structure requires additional sealing, which is relatively complicated and also increases the risk of seal leakage. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a high-bonding plastic-coated end plate for fuel cells, which can increase the physical bonding force between the PPS resin end plate and the metal cover plate, improve the problem of insufficient bonding force at the metal-non-metal interface, and ensure the airtightness of the fuel cell system.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A high-bonding plastic-coated end plate for fuel cells includes a metal cover plate and a PPS resin end plate. The surface of the metal cover plate is laser-processed into a micro-nano structure. The PPS resin end plate coats the metal cover plate. The metal cover plate and the PPS resin end plate constitute the end plate of the PPS-coated metal cover plate.

[0008] The PPS resin end plate has an embedding groove in the middle and cavity structures on both sides.

[0009] Preferably, an opening groove is provided on one side of the embedding groove.

[0010] Preferably, the cavity structure includes a hydrogen inlet, a coolant outlet, an air outlet, an air inlet, a coolant inlet, and a hydrogen outlet, wherein the hydrogen inlet, the coolant outlet, and the air outlet are located on one side of the PPS resin end plate.

[0011] Preferably, the air inlet, the coolant inlet, and the hydrogen outlet are located on the other side of the PPS resin end plate.

[0012] Preferably, the PPS resin end plate has multiple limiting grooves around its perimeter, and the limiting grooves are semi-circular.

[0013] Preferably, the metal cover plate has multiple first mounting holes around its perimeter, and the positions of the first mounting holes correspond to the positions of the limiting grooves.

[0014] Preferably, the PPS resin end plate has multiple protruding blocks on both sides.

[0015] Preferably, the protruding block of the PPS resin end plate is provided with a second mounting hole.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) By setting a metal cover plate and a PPS resin end plate, the technical effect that can be achieved is that by using laser to process the surface of the metal cover plate into a micro-nano structure, the physical locking of the PPS resin end plate when it is coated with the metal cover plate is increased, the physical bonding force between the PPS resin end plate and the metal cover plate is increased, the problem of insufficient bonding force between metal and non-metal interface is improved, and the airtightness of the fuel cell system is guaranteed.

[0018] (2) By setting a metal cover plate and a PPS resin end plate, the technical effect that can also be achieved is that the PPS resin end plate has a cavity structure on both sides. The cavity structure is integrated with the PPS resin and the metal cover plate. Compared with the independent PPS injection molded end plate, the mold angle is reduced and the flow resistance of gas and liquid is not affected. Multiple limiting grooves are opened around the PPS resin end plate. The limiting grooves are semi-circular. Multiple first mounting holes are opened around the metal cover plate. The position of the first mounting hole corresponds to the position of the limiting groove, which facilitates the positioning and installation of other components of the fuel cell.

[0019] (3) By setting the PPS resin end plate, the technical effect that can be achieved is that the PPS resin end plate has an embedding groove in the middle, so that the current collector in the fuel cell can be embedded in the middle of the PPS resin end plate, thereby avoiding the current collector from contacting the liquid flowing through the two side openings when the fuel cell is working, avoiding current collector corrosion, avoiding electrical short circuits or leakage and other safety hazards, further increasing insulation performance, and the setting of the opening groove on one side of the embedding groove can facilitate the positioning and installation of the current collector. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present utility model;

[0022] Figure 2 This is the right view of the present invention;

[0023] Figure 3 This is the front view of the present invention;

[0024] Figure 4 This is a bottom view of the present invention;

[0025] Explanation of key component symbols:

[0026] In the diagram: 1. Metal cover plate; 2. PPS resin end plate; 3. Embedded groove; 301. Opening groove; 401. Hydrogen inlet; 402. Coolant outlet; 403. Air outlet; 404. Air inlet; 405. Coolant inlet; 406. Hydrogen outlet; 5. First mounting hole; 6. Limiting groove; 7. Second mounting hole. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Reference Figures 1 to 4 This utility model discloses a high-bonding plastic-coated end plate for fuel cells, comprising a metal cover plate 1 and a PPS resin end plate 2. The surface of the metal cover plate 1 is laser-processed into a micro-nano structure. The PPS resin end plate 2 is plastic-coated with the metal cover plate 1. The metal cover plate 1 and the PPS resin end plate 2 constitute the end plate of the PPS plastic-coated metal cover plate. By laser-processing the surface of the metal cover plate 1 into a micro-nano structure, the physical locking of the PPS resin end plate 2 when plastic-coating the metal cover plate 1 is increased, the physical bonding force between the PPS resin end plate 2 and the metal cover plate 1 is increased, the problem of insufficient bonding force at the metal-non-metal interface is improved, and the airtightness of the fuel cell system is guaranteed.

[0031] An embedding groove 3 is provided in the middle of the PPS resin end plate 2, and cavity structures are provided on both sides of the PPS resin end plate 2. The cavity structure integrates PPS resin with the metal cover plate 1. Compared with the independent PPS injection molded end plate, it reduces the mold angle and does not affect the flow resistance of gas and liquid. An opening groove 301 is provided on one side of the embedding groove 3. The embedding groove 3 allows the current collector in the fuel cell to be embedded in the middle of the PPS resin end plate 2, thereby avoiding contact between the current collector and the liquid flowing through the cavity on both sides when the fuel cell is working. This avoids corrosion of the current collector, avoids electrical short circuits or leakage and other safety hazards, and further increases the insulation performance. The opening groove 301 facilitates the positioning and installation of the current collector.

[0032] Reference Figure 1 , Figure 3 and Figure 4 The cavity structure includes a hydrogen inlet 401, a coolant outlet 402, an air outlet 403, an air inlet 404, a coolant inlet 405, and a hydrogen outlet 406. The hydrogen inlet 401, coolant outlet 402, and air outlet 403 are located on one side of the PPS resin end plate 2; the air inlet 404, coolant inlet 405, and hydrogen outlet 406 are located on the other side of the PPS resin end plate 2.

[0033] Reference Figures 1 to 4The PPS resin end plate 2 has multiple limiting grooves 6 around its perimeter, and the limiting grooves 6 are semi-circular. The metal cover plate 1 has multiple first mounting holes 5 around its perimeter, and the positions of the first mounting holes 5 correspond to the positions of the limiting grooves 6, which facilitates the positioning and installation of other components of the fuel cell. Multiple protrusions are provided on both sides of the PPS resin end plate 2. Second mounting holes 7 are provided on the protrusions of the PPS resin end plate 2.

[0034] The working principle and usage process of this utility model are as follows: The surface of the metal cover plate 1 is laser-processed into a micro-nano structure, and the PPS resin end plate 2 is coated with the metal cover plate 1. The metal cover plate 1 and the PPS resin end plate 2 constitute the end plate of the PPS coated metal cover plate. By laser-processing the surface of the metal cover plate 1 into a micro-nano structure, the physical locking of the PPS resin end plate 2 when coating the metal cover plate 1 is increased, the physical bonding force between the PPS resin end plate 2 and the metal cover plate 1 is increased, the problem of insufficient bonding force at the metal-non-metal interface is improved, and the airtightness of the fuel cell system is guaranteed.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high bonding force plastic encapsulated end plate for a fuel cell, characterized by: The end plate of the PPS plastic-coated metal cover plate comprises a metal cover plate (1) and a PPS resin end plate (2), the surface of the metal cover plate (1) is processed into a micro-nano structure by using laser, and the metal cover plate (1) is plastic-coated by the PPS resin end plate (2); the metal cover plate (1) and the PPS resin end plate (2) constitute the end plate of the PPS plastic-coated metal cover plate. The middle part of the PPS resin end plate (2) is provided with an embedded groove (3), and the two sides of the PPS resin end plate (2) are provided with a cavity structure.

2. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 1, wherein: One side of the embedded groove (3) is provided with an open groove (301).

3. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 1, wherein: The cavity structure comprises a hydrogen inlet (401), a cooling liquid outlet (402), an air outlet (403), an air inlet (404), a cooling liquid inlet (405) and a hydrogen outlet (406), the hydrogen inlet (401), the cooling liquid outlet (402) and the air outlet (403) are arranged on one side of the PPS resin end plate (2).

4. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 3, wherein: The air inlet (404), the cooling liquid inlet (405) and the hydrogen outlet (406) are arranged on the other side of the PPS resin end plate (2).

5. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 1, wherein: A plurality of limiting grooves (6) are arranged around the PPS resin end plate (2), and the limiting grooves (6) are arranged in a semicircular shape.

6. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 5, wherein: A plurality of first mounting holes (5) are arranged around the metal cover plate (1), and the positions of the first mounting holes (5) correspond to the positions of the limiting grooves (6).

7. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 6, wherein: A plurality of protruding blocks are arranged on the two sides of the PPS resin end plate (2).

8. A high bonding force plastic encapsulated end plate for a fuel cell as defined in claim 7, wherein: Second mounting holes (7) are arranged on the protruding blocks of the PPS resin end plate (2).

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