Limiting structure for fuel cell stack

Abstract

The utility model relates to the field of fuel cell stacks, in particular to a limiting structure for a fuel cell stack, which comprises a first end plate, a second end plate, bolts, a sealing plate, a stack and an elastic plate, the stack is mounted between the first end plate and the second end plate, and the first end plate and the second end plate are fixed through the bolts. Sealing plates are mounted on the front side and the rear side of the electric pile, an elastic plate is mounted between the sealing plate at the front end position and the first end plate, an elastic plate is mounted between the sealing plate at the rear end position and the second end plate, and the first end plate and the second end plate are fixed through bolts and threaded cylinders, so that the first end plate and the second end plate can be kept in a stable state.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell stacks, and specifically to a limiting structure for fuel cell stacks. Background Technology

[0002] A fuel cell stack is an assembly with a unified electrical output, consisting of two or more single cells and other necessary structural components. It requires a limiting structure to maintain stable contact pressure and compensate for the permanent compression deformation of the sealing ring. A Chinese patent (authorization announcement number CN218299842 U) discloses a limiting structure for a fuel cell stack and a fuel cell stack in general. In this patent, one of the end plates or insulating plates is provided with a boss, and the other is provided with a groove. The boss has a first limiting groove recessed along a first direction, and the groove has a second limiting groove recessed along the first direction. The boss can be embedded in the groove so that the first and second limiting grooves together form a limiting chamber. An elastic element is disposed within the limiting chamber. The limiting structure of this fuel cell stack is simple. Through the arrangement of bosses and grooves, the end plates and insulating plates can achieve an interlocking connection while simultaneously forming a limiting chamber for accommodating the elastic element. This effectively prevents lateral slippage of the elastic element, improving the stability and reliability of the fuel cell stack. However, the fixing structure between the end plates in this design, relying on the interlocking structure of bosses and grooves, has poor fixing effect and suffers from loosening. Therefore, those skilled in the art have provided a limiting structure for fuel cell stacks to solve the problems mentioned in the background art. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a limiting structure for a fuel cell stack, including a first end plate, a second end plate, bolts, a sealing plate, a fuel cell stack, and an elastic plate. The fuel cell stack is installed between the first end plate and the second end plate and is fixed between the first end plate and the second end plate by bolts. Sealing plates are installed on both the front and rear sides of the fuel cell stack. An elastic plate is installed between the sealing plate at the front end and the first end plate, and an elastic plate is installed between the sealing plate at the rear end and the second end plate.

[0004] Preferably: sleeves are installed at the four corners of the rear side of the first end plate, and guide cylinders can be inserted into the sleeves. The guide cylinders are installed at the four corners of the front side of the second end plate. A threaded cylinder is installed on the front side of the first end plate, and bolts are installed inside the threaded cylinder.

[0005] Preferably, the first end plate has a first fixing groove at the middle position of the upper side, and a first fixing plate is installed in the first fixing groove; the second fixing groove is at the middle position of the lower side of the first end plate, and a second fixing plate is installed in the second fixing groove; the third fixing groove is at the middle position of the left side of the first end plate, and a third fixing plate is installed in the third fixing groove; and the fourth fixing groove is at the middle position of the right side of the first end plate, and a fourth fixing plate is installed in the fourth fixing groove. All of these are fixed by nuts.

[0006] Preferably, a No. 1 sealing block is installed on the upper and lower sides of the sealing plate, and a No. 2 sealing block is installed on the left and right sides of the sealing plate.

[0007] The technical effects and advantages of this utility model are as follows:

[0008] 1. The guide tube is inserted into the sleeve, and the No. 1 end plate and the No. 2 end plate are fixed by bolts and threaded tubes, which can keep the No. 1 end plate and the No. 2 end plate in a stable state.

[0009] 2. By using fixing plates No. 1, No. 2, No. 3 and No. 4 to further secure end plates No. 1 and No. 2, they can be made more stable and prevent loosening. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a limiting structure for a fuel cell stack provided in an embodiment of this application;

[0011] Figure 2 This is an exploded view of a limiting structure for a fuel cell stack provided in an embodiment of this application. Figure 1 ;

[0012] Figure 3 This is an exploded view of a limiting structure for a fuel cell stack provided in an embodiment of this application. Figure 2 ;

[0013] Figure 4 This is a schematic diagram of a partial explosion structure in a limiting structure for a fuel cell stack provided in an embodiment of this application;

[0014] Figure 5 This application provides a limiting structure for a fuel cell stack. Figure 4 A schematic diagram of structure A.

[0015] In the diagram: 1. End plate No. 1; 2. End plate No. 2; 3. Bolt; 4. Fixing plate No. 1; 5. Fixing plate No. 2; 6. Fixing plate No. 3; 7. Fixing plate No. 4; 8. Nut; 9. Sealing plate; 10. Electrostatic precipitator; 11. Elastic plate; 101. Sleeve; 102. Threaded sleeve; 103. Fixing groove No. 1; 104. Fixing groove No. 2; 105. Fixing groove No. 3; 106. Fixing groove No. 4; 201. Guide cylinder; 901. Sealing block No. 1; 902. Sealing block No. 2. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example

[0017] Please see Figures 1-5 In this embodiment, a limiting structure for a fuel cell stack is provided, including a first end plate 1, a second end plate 2, bolts 3, a sealing plate 9, a fuel cell stack 10, and an elastic plate 11. The fuel cell stack 10 is installed between the first end plate 1 and the second end plate 2, and the first end plate 1 and the second end plate 2 are fixed together by bolts 3. Sealing plates 9 are installed on both the front and rear sides of the fuel cell stack 10. An elastic plate 11 is installed between the sealing plate 9 at the front end and the first end plate 1, and an elastic plate 11 is installed between the sealing plate 9 at the rear end and the second end plate 2.

[0018] Specifically, sleeves 101 are installed at the four corners of the rear side of end plate 1, and guide cylinders 201 can be inserted into sleeves 101. Guide cylinders 201 are installed at the four corners of the front side of end plate 2. Threaded cylinders 102 are installed on the front side of end plate 1, and bolts 3 are installed inside threaded cylinders 102. No. 1 sealing blocks 901 are installed on the upper and lower sides of sealing plate 9, and No. 2 sealing blocks 902 are installed on the left and right sides of sealing plate 9.

[0019] A first fixing groove 103 is provided at the middle position of the upper side of the first end plate 1, and a first fixing plate 4 is installed in the first fixing groove 103. A second fixing groove 104 is provided at the middle position of the lower side of the first end plate 1, and a second fixing plate 5 is installed in the second fixing groove 104. A third fixing groove 105 is provided at the middle position of the left side of the first end plate 1, and a third fixing plate 6 is installed in the third fixing groove 105. A fourth fixing groove 106 is provided at the middle position of the right side of the first end plate 1, and a fourth fixing plate 7 is installed in the fourth fixing groove 106. All of them are fixed by nuts 8.

[0020] The working principle of this utility model is as follows:

[0021] In a fuel cell stack, sealing plates 9 are installed on the front and rear sides of the stack 10 and fixed by sealing blocks 901 and 902. Elastic plates 11 are placed between end plate 1 and sealing plate 9, and between end plate 2 and sealing plate 9. Guide cylinder 201 is inserted into sleeve 101, and end plate 1 and end plate 2 are fixed by bolts 3 and threaded cylinder 102, which can keep end plate 1 and end plate 2 stable. End plate 1 and end plate 2 are further fixed by fixing plates 4, 5, 6, and 7, which can make them more stable and prevent loosening.

[0022] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A limiting structure for a fuel cell stack, characterized in that, It includes a first end plate (1), a second end plate (2), bolts (3), a sealing plate (9), a fuel cell stack (10), and an elastic plate (11). The fuel cell stack (10) is installed between the first end plate (1) and the second end plate (2). The first end plate (1) and the second end plate (2) are fixed together by bolts (3). Sealing plates (9) are installed on both the front and rear sides of the fuel cell stack (10). An elastic plate (11) is installed between the sealing plate (9) at the front end and the first end plate (1), and an elastic plate (11) is installed between the sealing plate (9) at the rear end and the second end plate (2).

2. The limiting structure for a fuel cell stack according to claim 1, characterized in that, Sleeves (101) are installed at the four corners of the rear side of the No. 1 end plate (1).

3. The limiting structure for a fuel cell stack according to claim 2, characterized in that, A guide tube (201) can be inserted into the sleeve (101), and the guide tube (201) is installed at the four corners of the front side of the second end plate (2).

4. The limiting structure for a fuel cell stack according to claim 2, characterized in that, A threaded cylinder (102) is installed on the front side of the first end plate (1), and a bolt (3) is installed inside the threaded cylinder (102).

5. A limiting structure for a fuel cell stack according to claim 4, characterized in that, The first end plate (1) is provided with a first fixing groove (103) at the middle position of the upper side, and a first fixing plate (4) is installed in the first fixing groove (103). The first end plate (1) is provided with a second fixing groove (104) at the middle position of the lower side, and a second fixing plate (5) is installed in the second fixing groove (104). The first end plate (1) is provided with a third fixing groove (105) at the middle position of the left side, and a third fixing plate (6) is installed in the third fixing groove (105). The first end plate (1) is provided with a fourth fixing groove (106) at the middle position of the right side, and a fourth fixing plate (7) is installed in the fourth fixing groove (106). All of them are fixed by nuts (8).

6. The limiting structure for a fuel cell stack according to claim 1, characterized in that, The sealing plate (9) has a No. 1 sealing clip (901) installed on its upper and lower sides.

7. A limiting structure for a fuel cell stack according to claim 6, characterized in that, The sealing plate (9) is equipped with No. 2 sealing clips (902) on both the left and right sides.

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