Fuel cell blind end plate with diaphragm spring assembly

Abstract

The utility model belongs to the field of fuel cells, and discloses a fuel cell blind end plate with a diaphragm spring assembly, which comprises an end plate main body, a metal structural member and a diaphragm spring, the end plate body is of a laminated embedded type assembly structure, and the diaphragm type spring and the metal structural part are arranged in the embedded structure of the end plate body from bottom to top. The end plate structure has the advantages of being simple in structural form, low in cost, even in stacking force application and good in impact resistance.

Description

Technical Field

[0001] The utility model belongs to the field of fuel cells, and in particular relates to a fuel cell blind end plate with a diaphragm spring assembly. Background Art

[0002] The end plate is an important component of the fuel cell stack. Its main function is to transfer the stacking force to the fuel cell core to ensure the normal operation of the fuel cell stack. Therefore, sufficient strength and rigidity are the most important characteristics of the end plate. Sufficient strength can ensure that the end plate assembly will not be damaged under the action of the stacking force, and sufficient rigidity can make the deformation of the end plate under the action of the stacking force more reasonable, thereby evenly transferring the stacking force to the fuel cell stack core. Utility Model Content

[0003] The utility model overcomes the above defects and provides a fuel cell blind end plate with a diaphragm spring assembly. The end plate structure has the advantages of simple structure, low cost, uniform application of stacking force and good impact resistance.

[0004] The technical solution of the utility model is as follows.

[0005] A fuel cell blind end plate with a diaphragm spring assembly comprises an end plate body, a metal structural part and a diaphragm spring; the end plate body is a stacked embedded assembly structure, and the diaphragm spring and the metal structural part are arranged in the embedded structure of the end plate body from bottom to top.

[0006] Further preferably, a positioning column is arranged inside the end plate body.

[0007] Further preferably, positioning holes are provided on the metal structure and the diaphragm spring for cooperating with the positioning posts on the end plate body to position the metal structure or the diaphragm spring.

[0008] Further preferably, the top surface of the metal structure adopts an arc-shaped design, and the arc-shaped design has the effect of making the stacking force applied more uniformly.

[0009] Further preferably, the material of the end plate body is selected from insulating engineering plastic PPS-GF40.

[0010] Further preferably, the material of the metal structural part is selected from Al6061T6.

[0011] Further preferably, the material of the diaphragm spring is selected from spring steel.

[0012] Compared with the prior art, the blind end plate of the utility model has the following advantages:

[0013] (1) The structure is simple and compact. No large metal plates are used. Instead, the metal parts are designed to be embedded in the end plate body. This ensures the lightweight of the blind end plate assembly while ensuring the structural strength and rigidity.

[0014] (2) The diaphragm spring made of spring steel replaces the disc spring assembly in the existing solution, which has a complex structure and is inconvenient to install. The diaphragm spring has a simple structure, is easy to manufacture, and is low in cost. Its functional properties are completely consistent with those of the disc spring assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a blind end plate assembly;

[0016] Figure 2 is a schematic diagram of the main structure of the end plate;

[0017] Figure 3 It is a metal structural part (with an arc structure);

[0018] Figure 4 Schematic diagram of the diaphragm spring structure;

[0019] Figure 5 It is the structural side view of the diaphragm spring;

[0020] Figure 6 Assembly relationship diagram.

[0021] The components in the figure are as follows: end plate body 1, metal structure 2, diaphragm spring 3, positioning column 4, positioning hole 5. DETAILED DESCRIPTION

[0022] The following description combines specific illustrations to explain the technical solution in order to fully understand the utility model application. However, the present application can be implemented in many other ways different from those described herein, and similar generalization embodiments made by ordinary technicians in the field without creative work are all within the scope of protection of the utility model.

[0023] like Figure 1 to Figure 4 as well as Figure 6 As shown, a fuel cell blind end plate with a diaphragm spring assembly includes an end plate body 1, a metal structure 2, and a diaphragm spring 3; wherein the material of the end plate body is insulating engineering plastic PPS-GF40, the material of the metal structure is Al6061T6, and the material of the diaphragm spring is spring steel. The end plate body 1 is a stacked embedded assembly structure, and the diaphragm spring 3 and the metal structure 2 are arranged in the embedded structure of the end plate body 1 from bottom to top. Figure 2 As shown, in this embodiment, a positioning column 4 is arranged inside the end plate body 1. Figure 3 to Figure 5As shown, positioning holes 5 are provided on the metal structure 2 and the diaphragm spring 3 for cooperating with the positioning posts 4 on the end plate body 1 to position the metal structure 2 or the diaphragm spring 3 .

[0024] like Figure 3 As shown, the top surface of the metal structure 2 adopts an arc-shaped design, which has the effect of making the stacking force applied more uniformly.

[0025] The structure of the blind end plate assembly in the utility model is very simple and the assembly is very convenient. It can be described as a stacked embedded assembly. Two positioning columns are designed on the end plate body, and positioning holes are designed at the corresponding positions of the metal structural parts and the diaphragm spring, which makes the assembly very convenient.

[0026] The utility model innovatively designs a diaphragm spring to replace the common disc spring assembly, which greatly simplifies the end plate structure, and the diaphragm spring is easy to manufacture and low in cost, while completely replacing the disc spring assembly in terms of function.

[0027] The material of the diaphragm spring in the utility model should have high elastic limit and yield limit, high static strength, fatigue strength and high impact strength, and should also have sufficiently large plastic deformation performance for easy assembly. The diaphragm tilting angle in the diaphragm spring can be freely designed according to the different stacking forces required by the battery stack. In principle, the greater the required stacking force, the greater the tilting angle of the diaphragm.

[0028] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fuel cell blind end plate with a diaphragm spring assembly, characterized in that: It comprises an end plate body (1), a metal structural part (2) and a diaphragm spring (3); the end plate body (1) is a stacked embedded assembly structure, and the diaphragm spring (3) and the metal structural part (2) are arranged in the embedded structure of the end plate body (1) from bottom to top.

2. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: A positioning column (4) is arranged inside the end plate body (1).

3. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The metal structural component (2) is provided with a positioning hole (5) for cooperating with a positioning column (4) on the end plate body (1) to position the metal structural component (2).

4. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The diaphragm spring (3) is provided with a positioning hole (5) for cooperating with a positioning column (4) on the end plate body (1) to position the diaphragm spring (3).

5. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The top surface of the metal structural member (2) adopts an arc-shaped design, and the arc-shaped design has the effect of making the application of the stacking force more uniform.

6. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The material of the end plate body (1) is selected from insulating engineering plastic PPS-GF40.

7. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The material of the metal structural part (2) is selected from Al6061T6.

8. A fuel cell blind end plate with a diaphragm spring assembly as claimed in claim 1, characterized in that: The material of the diaphragm spring (3) is selected from spring steel.

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