Fuel cell short stack press fitting tool

Abstract

The utility model relates to the technical field of fuel cells, in particular to a fuel cell short stack press fitting tool. Comprising a lower tray, the upper end of the lower tray is connected with a pressure-bearing fixing disc, a lower end plate is arranged above the pressure-bearing fixing disc, the upper end of the lower end plate is detachably connected with an upper end plate, the upper end of the upper end plate is connected with a force uniformizing plate, the upper end of the force uniformizing plate is connected with an upper pressing plate, the side face of the force uniformizing plate is connected with a gas detection quick plug, and a through hole for gas to pass through is formed in the force uniformizing plate. Compared with the prior art, the method is easy to operate, high in practicability and capable of quickly adapting to assembly and debugging of the short pile in the pile development process, pre-research parameters can be conveniently obtained, reference is provided for follow-up long pile assembly design, and the development cost and the development risk before unadapted batch production of a project are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a short stack press-assembly tool for fuel cells. Background Art

[0002] During the fuel cell stack research and development stage, short stacks need to be disassembled and assembled multiple times for testing, and design parameters need to be adjusted through the assembly process. Different short stacks are used to verify different performance issues. The preliminary research results of this stage will lay a reference foundation for the subsequent long stack assembly and mass production.

[0003] Therefore, before assembling and debugging the long pile, the problem points in the design stage are usually obtained by assembling and debugging the short pile. A simple and efficient assembly tool is needed, which takes into account convenience, practicality, economy and reliability. Summary of the Invention

[0004] The utility model provides a fuel cell short stack press-assembly tool to overcome the deficiencies of the prior art.

[0005] In order to achieve the above-mentioned purpose, a fuel cell short stack pressing tool is designed, including a lower tray, the upper end of the lower tray is connected to the pressure-bearing fixed plate, a lower end plate is provided above the pressure-bearing fixed plate, the upper end of the lower end plate is detachably connected to the upper end plate, the upper end of the upper end plate is connected to the force equalizing plate, the upper end of the force equalizing plate is connected to the upper pressure plate, the side of the force equalizing plate is connected to the gas detection quick plug, and a through hole for gas to pass through is provided in the force equalizing plate.

[0006] A guide rod 1 is provided on the side surface of the lower end plate, and the other end of the guide rod 1 is connected to the pressure-bearing fixed plate.

[0007] The lower end plate and the pressure-bearing fixed plate are both provided with positioning holes that match the guide rod.

[0008] A second guide rod is provided on the side surface of the upper end plate, and the other end of the second guide rod is connected to the force equalizing plate.

[0009] The upper end plate and the force equalizing plate are both provided with positioning holes that match the second guide rod.

[0010] An accommodating space for accommodating the short stack core is provided between the lower end plate and the upper end plate.

[0011] The lower end plate and the upper end plate are connected by screws and fastened by nuts.

[0012] The lower tray and the upper pressing plate are both provided with a plurality of threaded holes.

[0013] The shape of the force equalizing plate matches the shapes of the lower end plate and the upper end plate.

[0014] Compared with the existing technology, the utility model is simple to operate and has strong practicality. It can quickly adapt to the assembly and debugging of short stacks in the process of fuel cell stack development, facilitates the acquisition of pre-research parameters, serves as a reference for subsequent long stack assembly design, and reduces the development cost and development risk of the project before adaptive batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 It is a top view of the utility model.

[0017] Figure 3 It is a cross-sectional view of the present utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown, the upper end of the lower tray 1 is connected to the pressure-bearing fixed plate 2, and a lower end plate 4 is provided above the pressure-bearing fixed plate 2. The upper end of the lower end plate 4 is detachably connected to the upper end plate 6, the upper end of the upper end plate 6 is connected to the force equalizing plate 8, and the upper end of the force equalizing plate 8 is connected to the upper pressure plate 9. The side of the force equalizing plate 8 is connected to the gas detection quick plug 7, and a through hole is provided in the force equalizing plate 8 for gas to pass through.

[0020] A guide rod 1 (3) is provided on the side of the lower end plate 4, the other end of which is connected to the pressure-bearing fixed plate 2. A guide rod 2 (12) is provided on the side of the upper end plate 6, the other end of which is connected to the force-equalizing plate 8. Positioning holes for the guide rod 1 (3) are provided on the lower end plate 4 and the pressure-bearing fixed plate 2. Positioning holes for the guide rod 2 (12) are also provided on the upper end plate 6 and the force-equalizing plate 8. These positioning holes, in conjunction with the guide rods, facilitate positioning during press assembly of the short stack core 5.

[0021] During specific use, the material of guide rod 1 3 and guide rod 2 12 is 45# steel with surface hardness HRC45 and surface roughness Ra0.8, which plays a positioning role, aiming to ensure the correct alignment of the lower end plate 4 and the upper end plate 6 when the battery stack is pressed, and also to reduce the severe friction between the guide rod and the positioning hole when the battery stack is pressed, which may cause burrs and flanging on the end plates.

[0022] An accommodating space for accommodating the short stack core 5 is provided between the lower end plate 4 and the upper end plate 6 .

[0023] The lower end plate 4 and the upper end plate 6 are connected by screws 10 and fastened by nuts 11. The lower end plate 4 and the upper end plate 6 are detachably connected by the screws and nuts.

[0024] The lower tray 1 and the upper pressing plate 9 are both provided with a plurality of threaded holes 13 for easy subsequent processing and assembly. When in use, the lower tray 1 and the upper pressing plate 9 are made of 45# steel, and the surface is oxidized and blackened to prevent corrosion.

[0025] The shape of the force equalizing plate 8 matches the shape of the lower end plate 4 and the upper end plate 6. Figure 2 As shown, the shape of the force equalizing plate 8 is determined according to the shapes of the lower end plate 4 and the upper end plate 6 to ensure a large contact area as much as possible, while reserving space for tightening the screw 10, in order to avoid uneven force on the stack due to the small contact area of ​​the end plates.

[0026] In specific use, the material of the pressure fixing plate 2 and the force equalizing plate 8 is P20 steel, and the upper and lower surfaces are heat treated with a quenching depth of 2mm to improve their surface hardness and ensure that there is no deformation after bearing several tons of pressing force.

[0027] When the present invention is in use, the pressure-bearing fixed plate 2 is fixed to the lower tray 1 by four M10 bolts, and the lower end plate 4, the short core 5, and the upper end plate 6 are placed through the cooperation of the guide rods and the positioning holes. The force equalizing plate 8 is fixed to the upper pressure plate 9 by four M10 bolts, and together they apply pressure downward to the upper end plate 6. When the predetermined pressing force value is reached, the lower end plate 4, the short core 5, and the upper end plate 6 are tightened together by the screw 10 and the nut 11.

[0028] During gas inspection, if Figure 3 As shown, the gas is introduced into the force equalizing plate 8 through the gas detection quick plug 7, and flows into the upper end plate 6 through the corresponding through holes on the force equalizing plate 8, completing the airtightness detection.

Claims

1. A fuel cell short stack press assembly tool, including a lower tray, characterized by: The upper end of the lower tray (1) is connected to the pressure-bearing fixed plate (2), a lower end plate (4) is provided above the pressure-bearing fixed plate (2), the upper end of the lower end plate (4) is detachably connected to the upper end plate (6), the upper end of the upper end plate (6) is connected to the equalizing plate (8), the upper end of the equalizing plate (8) is connected to the upper pressure plate (9), the side of the equalizing plate (8) is connected to the gas detection quick plug (7), and a through hole for gas to pass through is provided in the equalizing plate (8).

2. A fuel cell short stack press assembly tool according to claim 1, characterized in that: A guide rod (3) is provided on the side of the lower end plate (4), and the other end of the guide rod (3) is connected to the pressure-bearing fixed plate (2).

3. A fuel cell short stack press assembly tool according to claim 2, characterized in that: The lower end plate (4) and the pressure-bearing fixed plate (2) are both provided with positioning holes that cooperate with the guide rod 1 (3).

4. The fuel cell short stack press assembly tool according to claim 1, characterized in that: A second guide rod (12) is provided on the side of the upper end plate (6), and the other end of the second guide rod (12) is connected to the force equalizing plate (8).

5. The fuel cell short stack press assembly tool according to claim 4, characterized in that: The upper end plate (6) and the force equalizing plate (8) are both provided with positioning holes that cooperate with the second guide rod (12).

6. The fuel cell short stack press assembly tool according to claim 1, characterized in that: An accommodating space for accommodating the short stack core (5) is provided between the lower end plate (4) and the upper end plate (6).

7. The fuel cell short stack press assembly tool according to claim 1, characterized in that: The lower end plate (4) and the upper end plate (6) are connected via a screw (10) and fastened via a nut (11).

8. The fuel cell short stack press assembly tool according to claim 1, characterized in that: The lower tray (1) and the upper pressing plate (9) are both provided with a plurality of threaded holes (13).

9. The fuel cell short stack press assembly tool according to claim 1, characterized in that: The shape of the force equalizing plate (8) matches the shapes of the lower end plate (4) and the upper end plate (6).

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