Limiting structure of fuel cell stack

Abstract

The utility model discloses a limiting structure of a fuel cell stack, which comprises an upper limiting plate, a lower limiting plate, a limiting frame A and a limiting frame B. The limiting frame A is fixedly mounted at the upper end of the bottom limiting plate, and the limiting frame B is fixedly mounted at the bottom of the limiting plate. A battery stack body is arranged on the inner side of the limiting frame A and the inner side of the limiting frame B. A protection plate base is arranged on the surface of each limiting plate, and a protection plate is arranged on one side of each protection plate base. According to the device, when the electrolyte of the galvanic pile leaks, the corrosion time of threads of the limiting structure can be delayed through the protection plate, meanwhile, abnormal sound can be made to remind a worker to check the galvanic pile, the situation that the structural stability of the whole galvanic pile is affected after the limiting structure is loosened is avoided, and meanwhile in the installation process of the device, the worker does not need to assist in fixing the galvanic pile; and meanwhile, the deviation amplitude of components in the electric pile after a worker collides with the electric pile can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stack limiting structures, in particular to a limiting structure for a fuel cell stack. Background Technique

[0002] A fuel cell stack is a device that can directly convert chemical energy into electrical energy. It consists of many individual cells that generate an electric current through chemical reactions, thereby generating electrical energy. The limiting structure of the stack refers to the structure used to fix and maintain the positions of the internal components of the stack. They are usually located at the top and bottom of the stack to ensure that the unit cells, electrolyte layers, and other key components are in the correct positions. When the electrolyte inside the stack leaks, the leaked electrolyte will corrode the bolt threads of the limiting structure for a long time, resulting in the loosening of the limiting structure. After the limiting structure becomes loose, it will affect the structural stability of the entire stack, causing the positions of the unit cells and electrolyte layers inside the stack to shift, and then leading to a large-scale electrolyte leakage and pollution situation in the stack. Moreover, during the installation process of the existing device, the staff needs to be highly concentrated to avoid colliding with the stack body and causing the unit cells and electrolyte layers inside the stack to shift.

[0003] The implementation of the utility model aims to provide a limiting structure for a fuel cell stack to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art proposed in the background technique, and to propose a limiting structure for a fuel cell stack.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A limiting structure for a fuel cell stack includes a limiting plate, a limiting frame A, and a limiting frame B. There are two upper and lower limiting plates in total. A limiting frame A is fixedly installed at the upper end of the bottom limiting plate. A limiting frame B is fixedly installed at the bottom of the limiting plate. A battery stack main body is arranged inside the limiting frame A and the limiting frame B. Protective plate bases are arranged on the surfaces of the limiting plates. A protective plate is arranged on one side of the protective plate base. Limiting plate screw holes are arranged outside the protective plate base. A protective plate groove is arranged on the surface of the protective plate. A protective plate spring is arranged inside the protective plate. Rubber rod connection blocks are arranged at both ends of the protective plate. Rubber rods are arranged inside the rubber rod connection blocks. A clamping groove is arranged at the upper end of the limiting frame A. A clamping buckle is arranged at the bottom of the limiting frame B.

[0007] Preferably, limiting plate screw holes are arranged outside the two limiting plates. Fixing rods are arranged inside the limiting plate screw holes. Fixing rod screws are arranged at both ends of the fixing rod. Nuts are arranged outside the fixing rod screws.

[0008] Preferably, rubber rod connecting blocks are fixedly installed on the outer sides of the limiting frame A and the limiting frame B, and the rubber rod connecting blocks on the surfaces of the limiting frame A and the limiting frame B are connected to the rubber rod connecting blocks on the surface of the protection plate through rubber rods.

[0009] Preferably, the limiting frame A and the limiting frame B are respectively composed of vertical support rods and horizontal stabilizing rods, and protection plate springs are arranged on the outer sides of the vertical support rods on the left and right sides of the limiting frame A and the limiting frame B.

[0010] Preferably, a plurality of protection plate grooves are arranged on the surface of the protection plate, and each protection plate groove corresponds to a limiting plate screw hole on the surface of the limiting plate.

[0011] Preferably, the whole material of the fixing rod is steel, and the whole material of the protection plate is aluminum.

[0012] Preferably, a support rod return spring is arranged at the connection between the bottom of the limiting frame B and the vertical support rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, by arranging the protection plate, rubber rod connecting blocks and rubber rods, when electrolyte leakage occurs in the fuel cell stack, the electrolyte will corrode the rubber rods, causing the rubber rods to break. Subsequently, due to the breakage of the rubber rods, the inner protection plate springs will push the protection plate to fit onto the surface of the fixing rod through their own deformation. During the fitting process, the protection plate and the fixing rod will collide and emit a strange noise of metal collision to remind the staff. Furthermore, when the electrolyte in the fuel cell stack leaks, the present device can delay the corrosion time of the threads of the limiting structure through the protection plate, and at the same time can emit a strange noise to remind the staff to check the fuel cell stack, avoiding the influence of the loosening of the limiting structure on the structural stability of the whole fuel cell stack.

[0015] 2. By arranging the limiting frame A and the limiting frame B, when the staff installs the limiting structure, the staff can place the fuel cell stack inside the limiting frame A, cover the limiting frame B on the upper end of the limiting frame A, and make the buckle at the bottom of the limiting frame B snap into the card slot at the upper end of the limiting frame A to perform preliminary limiting and fixing on the fuel cell stack. Furthermore, during the installation process of the present device, it is not necessary for the staff to assist in fixing the fuel cell stack, and at the same time, the offset amplitude of the components inside the fuel cell stack after the staff collides with the fuel cell stack can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a limiting structure of a fuel cell stack proposed by the present utility model;

[0017] Figure 2 is a schematic diagram of the limiting frame A and the limiting frame B;

[0018] Figure 3 Schematic diagram of the deployment structure of the protection plate;

[0019] Figure 4 is Figure 3 Enlarged schematic diagram of the structure at point A;

[0020] Figure 5 Schematic diagram of the separation structure of the limit frame A and the limit frame B.

[0021] In the figure: 1. Limit plate; 2. Main body of the battery stack; 3. Fixed rod; 4. Limit frame A; 5. Limit frame B; 6. Protection plate; 7. Protection plate base; 8. Rubber rod; 9. Limit plate screw hole; 10. Fixed rod screw; 11. Nut; 12. Protection plate spring; 13. Protection plate groove; 14. Rubber rod connection block; 15. Card slot; 16. Snap. Specific embodiments

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Embodiment 1

[0027] Reference Figures 1-5 , a limiting structure for a fuel cell stack, comprising a limiting plate 1, a limiting frame A 4 and a limiting frame B 5. There are two upper and lower limiting plates 1 in total. The upper end of the bottom limiting plate 1 is fixedly installed with a limiting frame A 4, and the bottom of the limiting plate 1 is fixedly installed with a limiting frame B 5. The inside of the limiting frame A 4 and the limiting frame B 5 is provided with a battery stack main body 2. The surfaces of both limiting plates 1 are provided with a protective plate base 7, and one side of the protective plate base 7 is provided with a protective plate 6. The outside of the protective plate base 7 is provided with a limiting plate screw hole 9. The surface of the protective plate 6 is provided with a protective plate groove 13, and the inside of the protective plate 6 is provided with a protective plate spring 12. Both ends of the protective plate 6 are provided with rubber rod connection blocks 14. The inside of the rubber rod connection blocks 14 is provided with rubber rods 8. The rubber rod connection blocks 14 on the outside of the limiting frame A 4 and the limiting frame B 5 are fixedly installed, and the rubber rod connection blocks 14 on the surfaces of the limiting frame A 4 and the limiting frame B 5 are connected to the rubber rod connection blocks 14 on the surface of the protective plate 6 through rubber rods 8. The limiting frame A 4 and the limiting frame B 5 are respectively composed of vertical support rods and horizontal stabilizing rods. The outside of the vertical support rods on the left and right sides of the limiting frame A 4 and the limiting frame B 5 are provided with protective plate springs 12. The overall material of the fixing rod 3 is steel, and the overall material of the protective plate 6 is aluminum. The surface of the protective plate 6 is provided with a plurality of protective plate grooves 13, and each protective plate groove 13 corresponds to the limiting plate screw hole 9 on the surface of the limiting plate 1. When the stack leaks electrolyte, the electrolyte will flow along the horizontal stabilizing rod to corrode the rubber rod 8, causing the rubber rod 8 to break. Subsequently, due to the breakage of the rubber rod 8, the protective plate spring 12 exerts an outward thrust on the protective plate 6. There is a hinge at the connection between the protective plate base 7 and the protective plate 6, so that the protective plate spring 12 pushes the protective plate 6 to unfold outward. Subsequently, the protective plate groove 13 on the outside of the protective plate 6 will fit on the surface of the fixing rod 3. After the protective plate groove 13 fits on the surface of the fixing rod 3, the protective plate 6 can transfer part of the leaked electrolyte, preventing a large amount of electrolyte from flowing into the limiting plate screw hole 9 to corrode the thread, delaying the loosening time of the fixing rod 3. At the same time, the vibration generated during the operation of the device will drive the unfolded protective plate 6 to jump. After the protective plate 6 jumps and displaces, the inner protective plate spring 12 will push the protective plate 6 to fit on the surface of the fixing rod 3 through its own deformation. During the fitting process, the collision between the protective plate 6 and the fixing rod 3 will emit a strange noise of metal collision to remind the staff.

[0028] The upper end of the limit frame A4 is provided with a clamping groove 15, the bottom of the limit frame B5 is provided with a buckle 16, a support rod return spring is provided at the connection between the bottom of the limit frame B5 and the vertical support rod, limit plate screw holes 9 are provided on the outer sides of the two limit plates 1, and a fixing rod 3 is provided inside the limit plate screw holes 9. Both ends of the fixing rod 3 are provided with fixing rod screws 10, and nuts 11 are provided on the outer sides of the fixing rod screws 10. When the staff installs the limit structure, the staff can place the fuel cell stack into the inner side of the limit frame A4, cover the limit frame B5 on the upper end of the limit frame A4, and make the buckle 16 at the bottom of the limit frame B5 snap into the clamping groove 15 at the upper end of the limit frame A4 to perform preliminary limit fixation on the fuel cell stack. When the heights of the fuel cell stacks are different, the staff can adjust the support rod return spring by pressing down to adjust the height of the limit frame B5, so as to ensure that the upper limit plate 1 can fit on the surface of the fuel cell stack. Subsequently, the staff can insert the fixing rod 3 into the limit plate screw holes 9 on the outer sides of the two limit plates 1, and then use the nuts 11 to screw onto the fixing rod screws 10 at both ends of the fixing rod 3 to fix the fixing rod 3.

[0029] Working principle: When installing the limit structure, the staff can place the fuel cell stack into the inner side of the limit frame A4, cover the limit frame B5 on the upper end of the limit frame A4, and make the buckle 16 at the bottom of the limit frame B5 snap into the clamping groove 15 at the upper end of the limit frame A4 to perform preliminary limit fixation on the fuel cell stack. When the heights of the fuel cell stacks are different, the staff can adjust the support rod return spring by pressing down to adjust the height of the limit frame B5, so as to ensure that the upper limit plate 1 can fit on the surface of the fuel cell stack. Subsequently, the staff can insert the fixing rod 3 into the limit plate screw holes 9 on the outer sides of the two limit plates 1, and then use the nuts 11 to screw onto the fixing rod screws 10 at both ends of the fixing rod 3 to fix the fixing rod 3.

[0030] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

Claims

1. A limiting structure for a fuel cell stack, comprising a limiting plate (1), a limiting frame A (4) and a limiting frame B (5), characterized in that: The limiting plate (1) is provided with two upper and lower ones, and the upper end of the bottom limiting plate (1) is fixedly installed with a limiting frame A (4), and the bottom of the limiting plate (1) is fixedly installed with a limiting frame B (5), and the inner sides of the limiting frame A (4) and the limiting frame B (5) are provided with a battery stack body (2), and the surface of the limiting plate (1) is provided with a protective plate base (7), and one side of the protective plate base (7) is provided with a protective plate (6), and the outer side of the protective plate base (7) is provided with a limiting plate screw hole (9), the surface of the protective plate (6) is provided with a protective plate groove (13), and the inner side of the protective plate (6) is provided with a protective plate spring (12), and both ends of the protective plate (6) are provided with a rubber rod connecting block (14), and the inner side of the rubber rod connecting block (14) is provided with a rubber rod (8), the upper end of the limiting frame A (4) is provided with a card slot (15), and the bottom of the limiting frame B (5) is provided with a buckle (16).

2. A fuel cell stack limiting structure according to claim 1, characterized in that: The outer sides of the two limit plates (1) are provided with limit plate screw holes (9), and the inner sides of the limit plate screw holes (9) are provided with fixing rods (3), both ends of the fixing rods (3) are provided with fixing rod screws (10), and the outer sides of the fixing rod screws (10) are provided with nuts (11).

3. The limiting structure of a fuel cell stack according to claim 1, characterized in that: The outer sides of the limit frame A (4) and the limit frame B (5) are both fixedly mounted with rubber rod connecting blocks (14), and the rubber rod connecting blocks (14) on the surfaces of the limit frame A (4) and the limit frame B (5) are connected to the rubber rod connecting blocks (14) on the surface of the protective plate (6) via rubber rods (8).

4. The limiting structure of a fuel cell stack according to claim 1, characterized in that: The limiting frame A (4) and the limiting frame B (5) are respectively composed of a vertical support rod and a transverse stabilizing rod, and protective plate springs (12) are provided on the outer sides of the vertical support rods on the left and right sides of the limiting frame A (4) and the limiting frame B (5).

5. The limiting structure of a fuel cell stack according to claim 1, characterized in that: A plurality of protective plate grooves (13) are provided on the surface of the protective plate (6), and each protective plate groove (13) corresponds to a limiting plate screw hole (9) on the surface of the limiting plate (1).

6. A fuel cell stack limiting structure according to claim 2, characterized in that: The entire material of the fixing rod (3) is steel, and the entire material of the protection plate (6) is aluminum.

7. The limiting structure of a fuel cell stack according to claim 1, characterized in that: A support rod return spring is provided at the connection between the bottom of the limit frame B (5) and the vertical support rod.

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