Fuel cell sealing structure

Abstract

The utility model relates to the technical field of fuel cells, and discloses a fuel cell sealing structure which comprises a shell, the outer wall of the shell is fixedly connected with an end plate I, the outer wall of the end plate I is fixedly connected with an insertion rod, the outer wall of the insertion rod is slidably connected with an electric pile, the outer wall of the insertion rod is slidably connected with a single cell, and the single cell is fixedly connected with the shell. Each single battery comprises a bipolar plate I, a sealing plate I is fixedly connected to the interior of the bipolar plate I, a membrane electrode is fixedly connected to the outer wall of the sealing plate I, and a gas diffusion layer is fixedly connected to the interior of the membrane electrode. According to the utility model, the bipolar plate I is fixed with the sealing plate I and is directly attached to the membrane electrode, so that the sealing plate I is clamped between the bipolar plate I and the membrane electrode, the sealing plate II is fixed between the membrane electrode and the bipolar plate II, the sealing effect of the bipolar plate I and the bipolar plate II is ensured, the components form a single battery, and a plurality of single batteries are assembled into an electric pile; a shell of the first end plate is fixed through the outer wall of the inserting rod, and meanwhile the sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell sealing structure. Background Art

[0002] A fuel cell is a device that converts chemical energy directly into electrical energy through a chemical reaction. It usually consists of a negative electrode (hydrogen), a positive electrode (oxygen or air), an electrolyte, and a catalyst. In a fuel cell, the negative electrode (usually hydrogen) is decomposed into protons and electrons under the action of a catalyst. The protons pass through the electrolyte to the positive electrode, and the electrons form an electric current in the external circuit to complete the conversion of electrical energy. The positive electrode receives protons and electrons and reacts with oxygen to produce products such as water vapor. Fuel cells are widely regarded as one of the important technologies for future clean energy due to their high efficiency, pollution-free, and low noise characteristics, and are expected to replace traditional combustion engines in areas such as transportation, energy supply, and mobile devices.

[0003] In the prior art, most fuel cells are sealed only with a sealing ring structure inside. Although the sealing ring can achieve a sealing effect, it can cause leakage from the outside of the fuel cell, rendering the fuel cell unusable and easily causing damage to the machine equipped with the fuel cell.

[0004] According to the structure of the prior art, a single sealing ring cannot completely seal the fuel cell, and it is easy for the fuel cell to leak from the outside during use, which will not only damage the fuel cell and make it unusable, but also easily cause damage to the machine equipped with the fuel cell, affecting the working efficiency of the machine. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a fuel cell sealing structure, aiming to improve the sealing storage effect of the fuel cell in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fuel cell sealing structure, including an outer shell, the outer wall of the outer shell is fixedly connected to an end plate 1, the outer wall of the end plate 1 is fixedly connected to an insertion rod, the outer wall of the insertion rod is slidably connected to a fuel cell, the outer wall of the insertion rod is slidably connected to a single cell, the single cell includes a bipolar plate 1, the interior of the bipolar plate 1 is fixedly connected to a sealing plate 1, the outer wall of the sealing plate 1 is fixedly connected to a membrane electrode, the interior of the membrane electrode is fixedly connected to a gas diffusion layer, the gas diffusion layer is arranged on the front and back sides of the membrane electrode, the outer wall of the membrane electrode is provided with a sealing assembly, and the sealing assembly is used to seal the fuel cell.

[0007] Furthermore, the sealing assembly includes a second sealing plate, the second sealing plate is fixedly connected to the inside of the membrane electrode, and the outer wall of the membrane electrode is fixedly connected to a second bipolar plate.

[0008] Furthermore, a plug hole is provided inside the end plate 1, a combination plate is slidably connected inside the end plate 1, the combination plate is slidably connected inside the plug hole, and an outer wall of the combination plate is slidably connected to the end plate 2.

[0009] Furthermore, a slot is provided inside the combination plate, a locking plate is slidably connected to the outer wall of the combination plate, a sliding pin 1 is slidably connected to the inside of the locking plate, and the sliding pin 1 is slidably connected to the inside of the slot.

[0010] Furthermore, a card plate 1 is fixedly connected to the upper surface of the sliding pin 1, a spring 1 is arranged inside the locking plate, one end of the spring 1 is fixedly connected to the inside of the locking plate, and the other end of the spring 1 is fixedly connected to the upper surface of the card plate 1.

[0011] Furthermore, a second sliding pin is slidably connected inside the locking plate, and a second clamping plate is fixedly connected to the lower surface of the second sliding pin.

[0012] Furthermore, a second spring is provided inside the locking plate, one end of the second spring is fixedly connected to the inside of the locking plate, and the other end of the second spring is fixedly connected to the lower surface of the second clamping plate.

[0013] Furthermore, the second sliding pin is slidably connected to the inside of the card slot, and the card slot is arranged at the upper and lower ends inside the combined board.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the bipolar plate 1 is fixed to the sealing plate 1, and the bipolar plate 1 is directly fitted to the membrane electrode, so that the sealing plate 1 is fixed between the bipolar plate 1 and the membrane electrode, and the membrane electrode and the bipolar plate 2 are fixed by the sealing plate 2, which has a sealing effect on both the bipolar plate 1 and the bipolar plate 2. After being assembled, a single battery is formed. A plurality of single batteries are combined together and placed on the outer wall of the plug to form a battery stack, and the outer wall of the end plate 1 is fixed to the outer shell which also has a sealing effect.

[0016] 2. In the utility model, after the assembled battery stack is placed, the two assembly plates are inserted into the interior of the end plate one, and then the end plate two is slid on the outer wall of the assembly plate and fits with the battery stack. At this time, the locking plate is slid on the outer wall of the assembly plate. When the locking plate slides, the sliding pin one and the sliding pin two are squeezed, and the sliding pins continue to slide to be stuck into the interior of the card slot. Through multiple card slots, it is also convenient to adjust the positioning combination according to the size of the battery stack, thereby achieving the effect of facilitating assembly and assisting in sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of the fuel cell sealing structure proposed by the utility model;

[0018] Figure 2 A schematic diagram of the fuel cell stack structure of the fuel cell sealing structure proposed in the utility model;

[0019] Figure 3 A schematic diagram of a single cell structure of a fuel cell sealing structure proposed by the utility model;

[0020] Figure 4 A schematic diagram of the plugging rod structure of the fuel cell sealing structure proposed by the utility model;

[0021] Figure 5 A schematic diagram of the membrane electrode structure of the fuel cell sealing structure proposed by the utility model;

[0022] Figure 6 A schematic diagram of the combined plate structure of the fuel cell sealing structure proposed by the utility model;

[0023] Figure 7 for Figure 6 Enlarged schematic diagram at point A in the middle.

[0024] Legend:

[0025] 1. Shell; 2. End plate 1; 3. End plate 2; 4. Battery stack; 5. Single cell; 6. Plug rod; 7. Bipolar plate 1; 8. Sealing plate 1; 9. Membrane electrode; 10. Sealing plate 2; 11. Bipolar plate 2; 12. Gas diffusion layer; 13. Socket; 14. Combination plate; 15. Locking plate; 16. Slot; 17. Sliding pin 1; 18. Card plate 1; 19. Spring 1; 20. Sliding pin 2; 21. Card plate 2; 22. Spring 2. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figure 1 - Figure 5The utility model provides an embodiment: a fuel cell sealing structure, including a shell 1, an outer wall of the shell 1 is fixedly connected to an end plate 2, an outer wall of the end plate 2 is fixedly connected to a plug rod 6, an outer wall of the plug rod 6 is slidably connected to a battery stack 4, an outer wall of the plug rod 6 is slidably connected to a single cell 5, the single cell 5 includes a bipolar plate 7, a sealing plate 8 is fixedly connected inside the bipolar plate 7, a membrane electrode 9 is fixedly connected to an outer wall of the sealing plate 8, a gas diffusion layer 12 is fixedly connected inside the membrane electrode 9, the gas diffusion layer 12 is arranged on both sides of the membrane electrode 9, a sealing component is arranged on the outer wall of the membrane electrode 9, the sealing component is used to seal the fuel cell, the sealing component includes a sealing plate 2 10, the sealing plate 2 10 is fixedly connected to the inside of the membrane electrode 9, and a bipolar plate 2 11 is fixedly connected to the outer wall of the membrane electrode 9;

[0028] Specifically, the sealing plate 8 is fixed inside the bipolar plate 7, the membrane electrode 9 is fitted and fixed to the bipolar plate 7, the gas diffusion layer 12 is fixed on both the front and back sides of the membrane electrode 9, the other side of the membrane electrode 9 is fitted and fixed to the bipolar plate 11, and the sealing plate 10 is fixed between the membrane electrode 9 and the bipolar plate 11, thereby forming a single cell 5, and the sealing plate 8 and the sealing plate 10 simultaneously seal the bipolar plate 7 and the bipolar plate 11 and the membrane electrode 9, and multiple single cells 5 are combined into a battery stack 4 and placed on the outer wall of the insertion rod 6, so that the outer shell 1 fixed by the outer wall of the end plate 2 can also seal the battery stack 4.

[0029] Reference Figure 4 - Figure 7 The end plate 2 is provided with a plug hole 13, the end plate 2 is slidably connected with a combination plate 14, the combination plate 14 is slidably connected to the inside of the plug hole 13, the outer wall of the combination plate 14 is slidably connected with the end plate 3, the combination plate 14 is provided with a slot 16, the outer wall of the combination plate 14 is slidably connected with a lock plate 15, the lock plate 15 is slidably connected with a sliding pin 17, the sliding pin 17 is slidably connected to the inside of the slot 16, the upper surface of the sliding pin 17 is fixedly connected with a card plate 18, the lock plate 15 is provided with a spring 19, one end of the spring 19 is fixedly connected to the inside of the lock plate 15, and the other end of the spring 19 is fixedly connected to the upper surface of the card plate 18;

[0030] Specifically, the two combination plates 14 are respectively inserted into the inner sides of the end plate 2, the battery stack 4 is clamped in the middle, and then the end plate 23 is slid on the outer walls of the two combination plates 14 and fits with the battery stack 4, so that the end plate 23 is also fit with the outer wall of the shell 1, and the locking plate 15 is slid on the outer wall of the combination plate 14. The locking plate 15 drives the sliding pin 17 to slide during the sliding process. The sliding pin 17 is squeezed and compressed toward the inside of the locking plate 15 during the sliding process, thereby squeezing the spring 19. When the sliding pin 17 is inserted into the inside of the card slot 16, the spring 19 is reset to press against the sliding pin 17, thereby forming a fixation. Multiple card slots 16 are convenient for adjusting and fixing according to the size of the battery stack 4, so that the battery stack 4 is fixedly stored inside the shell 1, which has the effect of auxiliary sealing.

[0031] Reference Figure 7 The lock plate 15 is slidably connected with a second sliding pin 20, and a second card plate 21 is fixedly connected to the lower surface of the second sliding pin 20. A second spring 22 is arranged inside the lock plate 15, one end of the second spring 22 is fixedly connected to the inside of the lock plate 15, and the other end of the second spring 22 is fixedly connected to the lower surface of the second card plate 21. The second sliding pin 20 is slidably connected to the inside of the card slot 16, and the card slot 16 is arranged at the upper and lower ends of the inside of the combination plate 14;

[0032] Specifically, the locking plate 15 also drives the sliding pin 20 to slide while sliding. During the sliding process of the sliding pin 20, it is squeezed and compresses the card plate 21 and the spring 22 downward. When the sliding pin 20 is inserted into the interior of the card slot 16, the spring 22 is reset to press against the sliding pin 20 through the card plate 21. The fixed position of the sliding pin 20 can also be adjusted through multiple card slots 16, thereby playing a role in auxiliary combination fixation and sealing.

[0033] Working principle: When the fuel cell needs to be sealed, first fix the sealing plate 1 8 between the bipolar plate 1 7 and the membrane electrode 9, fix the sealing plate 2 10 between the membrane electrode 9 and the bipolar plate 2 11, then combine the multiple single cells 5 into a battery stack 4 and place it inside the shell 1 and clamp it on the outer wall of the plug 6, insert the two combined plates 14 into the end plate 1 2, slide the end plate 2 3 on the outer wall of the combined plate 14 and fit it on the outer wall of the shell 1, then slide the multiple locking plates 15 on the four ends of the combined plate 14 respectively, and the locking plates 15 drive the sliding pin 17 and the sliding pin 17 during the sliding process. Pin 20 slides, and during the sliding of sliding pin 17, card plate 18 and spring 19 are squeezed upwards. During the sliding of sliding pin 20, card plate 21 and spring 22 are squeezed downwards. When sliding pin 17 and sliding pin 20 are respectively inserted into the inside of the card slot 16, spring 19 and spring 22 are reset and press against sliding pin 17 and sliding pin 20. The position can be adjusted according to the size of the combined battery stack 4 through multiple card slots 16. In this way, end plate 2 3 is fixed to the outer wall of the outer shell 1, so that the outer shell 1 forms a sealed environment, thereby achieving the effect of sealing the storage of the fuel cell.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell sealing structure, comprising a housing (1), characterized in that: The outer wall of the shell (1) is fixedly connected to an end plate (2), the outer wall of the end plate (2) is fixedly connected to an insertion rod (6), the outer wall of the insertion rod (6) is slidably connected to a fuel cell (4), the outer wall of the insertion rod (6) is slidably connected to a single cell (5), the single cell (5) comprises a bipolar plate (7), the interior of the bipolar plate (7) is fixedly connected to a sealing plate (8), the outer wall of the sealing plate (8) is fixedly connected to a membrane electrode (9), the interior of the membrane electrode (9) is fixedly connected to a gas diffusion layer (12), the gas diffusion layer (12) is arranged on both the front and back sides of the membrane electrode (9), the outer wall of the membrane electrode (9) is provided with a sealing component, the sealing component is used to seal the fuel cell.

2. The fuel cell sealing structure according to claim 1, characterized in that: The sealing assembly comprises a second sealing plate (10), wherein the second sealing plate (10) is fixedly connected to the inside of the membrane electrode (9), and the outer wall of the membrane electrode (9) is fixedly connected to a second bipolar plate (11).

3. The fuel cell sealing structure according to claim 1, characterized in that: The end plate 1 (2) has an insertion hole (13) formed inside, the end plate 1 (2) is slidably connected to a combination plate (14), the combination plate (14) is slidably connected to the inside of the insertion hole (13), and the outer wall of the combination plate (14) is slidably connected to the end plate 2 (3).

4. The fuel cell sealing structure according to claim 3, characterized in that: A card slot (16) is provided inside the combination plate (14); a locking plate (15) is slidably connected to the outer wall of the combination plate (14); a sliding pin (17) is slidably connected inside the locking plate (15); and the sliding pin (17) is slidably connected inside the card slot (16).

5. The fuel cell sealing structure according to claim 4, characterized in that: The upper surface of the sliding pin (17) is fixedly connected to a card plate (18), and a spring (19) is arranged inside the locking plate (15), one end of the spring (19) is fixedly connected to the inside of the locking plate (15), and the other end of the spring (19) is fixedly connected to the upper surface of the card plate (18).

6. The fuel cell sealing structure according to claim 4, characterized in that: A second sliding pin (20) is slidably connected inside the locking plate (15), and a second clamping plate (21) is fixedly connected to the lower surface of the second sliding pin (20).

7. The fuel cell sealing structure according to claim 4, characterized in that: A second spring (22) is arranged inside the locking plate (15), one end of the second spring (22) is fixedly connected to the inside of the locking plate (15), and the other end of the second spring (22) is fixedly connected to the lower surface of the second clamping plate (21).

8. The fuel cell sealing structure according to claim 6, characterized in that: The second sliding pin (20) is slidably connected inside the clamping groove (16), and the clamping groove (16) is arranged at the upper and lower ends inside the combined plate (14).

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