Integrated electric pile end plate structure

Abstract

The utility model discloses an integrated electric pile end plate structure which comprises a first end plate, a second end plate, a connecting elbow assembly arranged on one side of the second end plate, an access assembly arranged between the first end plate and the second end plate, and a back pressure valve unit arranged on one side of the second end plate, the connecting bent pipe assembly is located on one side of the second end plate and comprises an air inlet bent pipe, a hydrogen outlet bent pipe, a cooling water inlet bent pipe, a cooling water outlet bent pipe, a hydrogen inlet bent pipe and an air outlet bent pipe from left to right, and the back pressure valve unit comprises an air inlet back pressure valve and an air outlet back pressure valve; the integration of the first end plate and the second end plate can realize the compact structure and high integration level, and compared with the traditional distributed electric pile end plate, the number of parts can be reduced, the overall volume and weight can be reduced, the space can be saved, the manufacturing and assembling processes can be simplified, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cells, in particular to an integrated stack end plate structure. Background Art

[0002] A hydrogen fuel cell is a conversion device for hydrogen energy, which uses hydrogen as fuel and directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. Compared with lithium battery applications, fuel cells have the advantages of short refueling time, long endurance mileage, low temperature resistance, large energy density, energy conservation and environmental protection.

[0003] As the core component of a fuel cell, the stack is the power generation site of the fuel cell. Its volume and weight are directly related to the output power of the entire fuel cell. The smaller the volume and the lighter the weight, the greater the energy density and the greater the output power. At present, conventional fuel cell stacks mainly consist of three major parts: a bare stack, a housing, and electrical connectors such as CVM inspections. The traditional bare stack and the housing are two independent units, fixed together through a connecting bracket. The system also needs to design a manifold or an adapter end plate to connect the three-chamber inlets and outlets of water, hydrogen, and air in the stack. The disadvantage of this structure is that it has redundant structure, large volume, heavy weight, many connecting components, difficult sealing, and increased risks of air leakage and liquid leakage, which affect the volume of the stack, the mass power density, and the performance of the fuel cell engine system.

[0004] The utility model designs an integrated stack end plate structure. Through an integrated injection molding process, a non-metallic insulating material such as PPS is secondarily injected on an aluminum alloy end plate. The characteristic of this structure is that the three-chamber side end plate of the bare stack, the insulating plate, the housing on the three-chamber side of the stack, and the three-chamber inlet and outlet adapter plate of the stack are combined into one, not only reducing the volume and weight, but also avoiding the sealing problems of multiple components affecting the performance of the fuel cell. At the same time, the coolant inlets and outlets are designed adjacent to each other on the secondarily injected non-metallic insulating plate. During low-temperature cold start, the high-temperature coolant at the outlet can reversely heat the coolant inlet, shortening the low-temperature cold start time and reducing the risk of the inlet coolant freezing, thus improving the performance of the fuel cell.

[0005] Therefore, in order to solve the deficiencies of the above problems, an integrated stack end plate structure is proposed. Summary of the Invention

[0006] The utility model overcomes the deficiencies of the prior art and provides an integrated stack end plate structure.

[0007] To achieve the above object, the technical solution adopted by the utility model is: an integrated stack end plate structure, comprising: a first end plate and a second end plate, a connecting elbow assembly disposed on one side of the second end plate, an access assembly disposed between the first end plate and the second end plate, and a back pressure valve unit disposed on one side of the second end plate;

[0008] The first end plate and the second end plate are inlaid and connected. The connecting elbow assembly is located on one side of the second end plate. The connecting elbow assembly includes, from left to right: an air inlet elbow, a hydrogen outlet elbow, a cooling water inlet elbow, a cooling water outlet elbow, a hydrogen inlet elbow, and an air outlet elbow.

[0009] The back pressure valve unit includes: an air inlet back pressure valve and an air outlet back pressure valve.

[0010] The access assembly is located between the first end plate and the second end plate. The access assembly includes, from left to right: a system-side air inlet, a system-side hydrogen outlet, a system-side cooling water inlet, a system-side cooling water outlet, a system-side hydrogen inlet, and a system-side air outlet.

[0011] In a preferred embodiment of the present invention, on one side of the second end plate, there are respectively provided, from left to right, a communicating air inlet inlay, a hydrogen outlet inlay, a cooling water inlet inlay, a cooling water outlet inlay, a hydrogen inlet inlay, and an air outlet inlay.

[0012] In a preferred embodiment of the present invention, the hydrogen outlet elbow, the cooling water inlet elbow, the cooling water outlet elbow, and the hydrogen inlet elbow are respectively and sequentially connected to one ends corresponding to the hydrogen outlet inlay, the cooling water inlet inlay, the cooling water outlet inlay, and the hydrogen inlet inlay by pipelines.

[0013] In a preferred embodiment of the present invention, the air inlet back pressure valve is located between the air inlet inlay and the hydrogen outlet elbow and is connected by a pipeline. The air outlet back pressure valve is located between the air outlet inlay and the air outlet elbow and is connected by a pipeline.

[0014] In a preferred embodiment of the present invention, the system-side air inlet, the system-side hydrogen outlet, the system-side cooling water inlet, the system-side cooling water outlet, the system-side hydrogen inlet, and the system-side air outlet are respectively and sequentially connected to the other ends corresponding to the air inlet inlay, the hydrogen outlet inlay, the cooling water inlet inlay, the cooling water outlet inlay, the hydrogen inlet inlay, and the air outlet inlay by pipelines.

[0015] In a preferred embodiment of the present invention, on the other side of the first end plate, there are provided a bare stack side cooling water outlet and a bare stack side cooling water inlet.

[0016] In a preferred embodiment of the present invention, the bare stack side cooling water outlet is connected to the system-side cooling water outlet by a pipeline, and the bare stack side cooling water inlet is connected to the system-side cooling water inlet by a pipeline.

[0017] In a preferred embodiment of the present invention, the first end plate is made of a polymer insulating material.

[0018] In a preferred embodiment of the present utility model, the second end plate is made of aluminum alloy material.

[0019] In a preferred embodiment of the present utility model, the first end plate and the second end plate are fixed by inlaying.

[0020] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0021] (1) The present utility model provides an integrated stack end plate structure. Through the integrated setting of the first end plate and the second end plate, the compactness and high integration of the structure can be achieved. Compared with the traditional decentralized stack end plate, the number of parts can be reduced, thereby reducing the overall volume and weight. The compact layout not only saves space but also helps to simplify the manufacturing and assembly processes, thus reducing the production cost.

[0022] (2) The present utility model provides an integrated stack end plate structure. Since the structure of the device body reduces the number of parts and simplifies the design, the packaging reduces the material and manufacturing costs. By reducing the number of parts, the maintenance cost and failure rate may also be reduced because fewer connection points mean fewer potential failure points.

[0023] (3) The present utility model provides an integrated stack end plate structure, which can improve the low-temperature cold start performance of the stack and extend the life of the stack. By arranging the cooling water inlet and outlet adjacent to each other, the temperature of the stack can be managed more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0025] Figure 1 is a schematic diagram of the outer structure of the preferred embodiment of the present utility model;

[0026] Figure 2 is a schematic diagram of the inner structure of the bare stack of the preferred embodiment of the present utility model;

[0027] Figure 3 is a schematic diagram of the non-metallic injection molded part structure of the preferred embodiment of the present utility model;

[0028] Figure 4 is a schematic diagram of the metal part structure of the preferred embodiment of the present utility model;

[0029] Figure 5 is a sectional view structure diagram of the preferred embodiment of the present utility model.

[0030] In the figure: 1. Air inlet back pressure valve; 2. Air inlet elbow; 3. Cooling water inlet elbow; 4. Cooling water outlet elbow; 5. Hydrogen outlet elbow; 6. Hydrogen inlet elbow; 7. Air outlet elbow; 8. Air outlet back pressure valve; 10. First end plate; 11. Second end plate; 20. Bare stack side cooling water outlet; 21. System side air inlet; 22. System side hydrogen outlet; 23. System side cooling water outlet; 24. System side cooling water inlet; 25. System side air outlet; 26. Bare stack side cooling water inlet; 27. System side hydrogen inlet; 30. Air inlet inlay; 31. Hydrogen outlet inlay; 32. Cooling water outlet inlay; 33. Cooling water inlet inlay; 34. Hydrogen inlet inlay; 35. Air outlet inlay. Detailed implementation manners

[0031] Now, the present utility model will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0032] As Figure 1 shown, an integrated stack end plate structure includes: a first end plate 10 and a second end plate 11, a connecting elbow assembly disposed on one side of the second end plate 11, an access assembly disposed between the first end plate 10 and the second end plate 11, and a back pressure valve unit disposed on one side of the second end plate 11.

[0033] As Figures 2 - 4 shown, the first end plate 10 and the second end plate 11 are inlaid and connected. The connecting elbow assembly is located on one side of the second end plate 11. From left to right, the connecting elbow assembly includes: an air inlet elbow 2, a hydrogen outlet elbow 5, a cooling water inlet elbow 3, a cooling water outlet elbow 4, a hydrogen inlet elbow 6, and an air outlet elbow 7.

[0034] The back pressure valve unit is: an air inlet back pressure valve 1 and an air outlet back pressure valve 8.

[0035] The access assembly is located between the first end plate 10 and the second end plate 11. From left to right, the access assembly includes: a system side air inlet 21, a system side hydrogen outlet 22, a system side cooling water inlet 24, a system side cooling water outlet 23, a system side hydrogen inlet 27, and a system side air outlet 25.

[0036] On one side of the second end plate 11, there are respectively provided, from left to right, a communicated air inlet inlay 30, a hydrogen outlet inlay 31, a cooling water inlet inlay 33, a cooling water outlet inlay 32, a hydrogen inlet inlay 34, and an air outlet inlay 35.

[0037] The hydrogen outlet elbow 5, the cooling water inlet elbow 3, the cooling water outlet elbow 4, the hydrogen inlet elbow 6 are respectively connected to one end of the hydrogen outlet embedding part 31, the cooling water inlet embedding part 33, the cooling water outlet embedding part 32, and the hydrogen inlet embedding part 34 in sequence and are connected by pipelines.

[0038] The air inlet back pressure valve 1 is located between the air inlet embedding part 30 and the hydrogen outlet elbow 5 and is connected by pipelines. The air outlet back pressure valve 8 is located between the air outlet embedding part 35 and the air outlet elbow 7 and is connected by pipelines.

[0039] The system-side air inlet 21, the system-side hydrogen outlet 22, the system-side cooling water inlet 24, the system-side cooling water outlet 23, the system-side hydrogen inlet 27, and the system-side air outlet 25 are respectively connected to the other ends of the air inlet embedding part 30, the hydrogen outlet embedding part 31, the cooling water inlet embedding part 33, the cooling water outlet embedding part 32, the hydrogen inlet embedding part 34, and the air outlet embedding part 35 in sequence and are connected by pipelines.

[0040] It should be noted that the air inlet back pressure valve 1 and the air outlet back pressure valve 8 are used to regulate the air inlet and outlet flow rates. The device body is composed of two parts, the first end plate 10 and the second end plate 11. The first end plate 10 is made of a high-strength, high-insulation, and high-temperature-resistant polymer insulating material, aiming to replace the insulating plate structure of the original solution. The second end plate 11 is formed by CNC machining of aluminum alloy material. On the one hand, it is used to fixedly connect the elbow assembly pipes and the back pressure valve unit and fix the insulating parts of the first end plate 10. On the other hand, it acts as part of the fuel cell stack housing.

[0041] As Figures 1 - 2 shown, on the other side of the first end plate 10, there are provided a bare stack side cooling water outlet 20 and a bare stack side cooling water inlet 26. The bare stack side cooling water outlet 20 is connected to the system-side cooling water outlet 23 by pipelines, and the bare stack side cooling water inlet 26 is connected to the system-side cooling water inlet 24 by pipelines.

[0042] It should be noted that through the settings of the bare stack side cooling water outlet 20 and the bare stack side cooling water inlet 26, the bare stack side cooling water outlet 20 and the bare stack side cooling water inlet 26 are the flow channel inlets and outlets of the system-side cooling water outlet 23 and the system-side cooling water inlet 24, and are designed adjacent to each other. It can ensure that during low-temperature cold start, the high-temperature water at the system-side cooling water outlet 23 can reversely heat the water at the system-side cooling water inlet 24, shortening the low-temperature cold start time and the risk of inlet cooling water icing, thereby improving the fuel cell stack performance and extending the fuel cell stack life. The first end plate 10 replaces the insulating plate of the original technology and is directly connected to the current collector plate. Therefore, it is injection-molded from high-strength, high-insulation, non-water-absorbing, and high-temperature-resistant materials.

[0043] As Figures 1 - 5As shown, the first end plate 10 is made of a polymer insulating material, and the second end plate 11 is made of an aluminum alloy material. The first end plate 10 and the second end plate 11 are fixed by inlaying.

[0044] It should be noted that the first end plate 10 and the second end plate 11 belong to an inlay structure, and the specific process is as follows: First, the second end plate 11 part is machined by a CNC machine, and then a non-metallic insulating material is injection-molded using the second end plate 11 as an injection mold, so that the second end plate 11 and the first end plate 10, in the first end plate 10, there are inlaid steps designed at the water, hydrogen, and air inlet and outlet positions. At the water, hydrogen, and air inlet and outlet positions in the second end plate 11, there are corresponding air inlet inlays 30, hydrogen outlet inlays 31, cooling water inlet inlays 33, cooling water outlet inlays 32, hydrogen inlet inlays 34, and air outlet inlays 35. Through such an inlay structure and an integrated injection molding process, it is ensured that the second end plate 11 and the first end plate 10 are firmly combined together. The second end plate 11 has a corresponding number of threaded holes around the three cavities for fixedly connecting the elbow assembly, which not only integrates the insulation of non-metals but also integrates the fastening strength of metals. The second end plate 11 is designed with corresponding sealing installation slots and threaded holes around the perimeter for sealing and fastening with other shell packaging plates. Thus, the second end plate 11 can be used as part of the stack housing packaging plate.

[0045] Compared with the traditional stack end plate with a dispersed structure, the solution of the present utility model has a more compact structure, higher integration, fewer parts, reduced volume and weight, and lower cost. At the same time, the cooling water inlet and outlet are designed adjacent to each other, improving the low-temperature cold start performance of the stack and extending the stack life.

[0046] Based on the ideal embodiments of the present utility model as an inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An integrated stack end plate structure, comprising: A first end plate (10) and a second end plate (11), a connecting elbow assembly disposed on one side of the second end plate (11), an access assembly disposed between the first end plate (10) and the second end plate (11), and a backpressure valve unit disposed on one side of the second end plate (11), characterized in that; The first end plate (10) and the second end plate (11) are connected by inlay, and the connecting elbow assembly is located on one side of the second end plate (11). The connecting elbow assembly includes, from left to right: an air inlet elbow (2), a hydrogen outlet elbow (5), a cooling water inlet elbow (3), a cooling water outlet elbow (4), a hydrogen inlet elbow (6), and an air outlet elbow (7); The backpressure valve unit is: an air inlet backpressure valve (1) and an air outlet backpressure valve (8); The access assembly is located between the first end plate (10) and the second end plate (11). The access assembly includes, from left to right: a system-side air inlet (21), a system-side hydrogen outlet (22), a system-side cooling water inlet (24), a system-side cooling water outlet (23), a system-side hydrogen inlet (27), and a system-side air outlet (25).

2. The integrated stack end plate structure according to claim 1, characterized in that: On one side of the second end plate (11), there are respectively provided, from left to right, a communicating air inlet inlay (30), a hydrogen outlet inlay (31), a cooling water inlet inlay (33), a cooling water outlet inlay (32), a hydrogen inlet inlay (34), and an air outlet inlay (35).

3. The integrated stack end plate structure according to claim 1, wherein: One end of the hydrogen outlet elbow (5), the cooling water inlet elbow (3), the cooling water outlet elbow (4), and the hydrogen inlet elbow (6) are respectively and sequentially corresponding to the hydrogen outlet inlay (31), the cooling water inlet inlay (33), the cooling water outlet inlay (32), and the hydrogen inlet inlay (34) and are connected by pipes.

4. An integrated stack end plate structure according to claim 1, characterized in that: The air inlet backpressure valve (1) is located between the air inlet inlay (30) and the hydrogen outlet elbow (5) and is connected by pipes, and the air outlet backpressure valve (8) is located between the air outlet inlay (35) and the air outlet elbow (7) and is connected by pipes.

5. The integrated stack end plate structure according to claim 1, characterized in that: The system-side air inlet (21), the system-side hydrogen outlet (22), the system-side cooling water inlet (24), the system-side cooling water outlet (23), the system-side hydrogen inlet (27), and the system-side air outlet (25) are respectively and sequentially corresponding to the other ends of the air inlet inlay (30), the hydrogen outlet inlay (31), the cooling water inlet inlay (33), the cooling water outlet inlay (32), the hydrogen inlet inlay (34), and the air outlet inlay (35) and are connected by pipes.

6. The integrated stack end plate structure according to claim 1, wherein: On the other side of the first end plate (10), there are provided a bare stack side cooling water outlet (20) and a bare stack side cooling water inlet (26).

7. An integrated stack end plate structure according to claim 6, characterized in that: The bare stack side cooling water outlet (20) is connected to the system-side cooling water outlet (23) by pipes, and the bare stack side cooling water inlet (26) is connected to the system-side cooling water inlet (24) by pipes.

8. The integrated stack end plate structure according to claim 1, characterized in that: The first end plate (10) is made of a polymer insulating material.

9. The integrated stack end plate structure according to claim 1, wherein: The second end plate (11) is made of an aluminum alloy material.

10. The integrated stack end plate structure according to claim 1, wherein: The first end plate (10) and the second end plate (11) are fixed by inlaying.

Images