Fuel cell sealing assembly and fuel cell comprising same

Abstract

The utility model provides a fuel cell sealing assembly and a fuel cell comprising the same, the fuel cell sealing assembly comprises a shell, a sealing base, an electrode and a wedge-shaped sealing piece, the sealing base is arranged on the shell, a first through hole is arranged on the sealing base, a second through hole is arranged on the wedge-shaped sealing piece, the first through hole and the second through hole are sleeved on the electrode, and the wedge-shaped sealing piece is arranged on the sealing base. The hole wall of the first through hole is provided with an inclined face matched with the wedge-shaped sealing piece, the wedge-shaped sealing piece is an elastic piece and extends into the first through hole, the outer wall of the wedge-shaped sealing piece is tightly attached to the inclined face, and the inner wall of the wedge-shaped sealing piece extrudes the electrode. The fuel cell comprises the fuel cell sealing assembly. The inclined surface matched with the wedge-shaped sealing element is arranged on the hole wall of the first through hole of the sealing base, so that the wedge-shaped sealing element is tightly attached to the inclined surface and extrudes the electrode at the same time, and interference fit is formed by utilizing elastic deformation, so that the sealing effect of the galvanic pile cavity is improved.

Description

Technical Field

[0001] This utility model relates to a fuel cell sealing assembly and a fuel cell containing the same. Background Technology

[0002] Currently, fuel cell stack positive and negative electrode outputs are typically directly connected to external devices via electrodes, while the stack cavity needs to meet the IP67 sealing standard. IP67 is an international standard protection rating used to describe the protection capabilities of electronic equipment or other products, particularly against solid objects (such as dust) and liquids. This standard was established by the International Electrotechnical Commission (IEC). Products with an IP67 rating have high dust and water resistance and can be used in various harsh environmental conditions. Existing direct electrode connection methods generally achieve sealing through methods such as adhesive dispensing or sealing rings. However, existing sealing methods result in poor sealing performance and high assembly costs for the stack cavity, making it difficult to achieve a cavity outlet seal to meet the overall IP67 requirement. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of poor sealing effect of the stack cavity when the electrode direct connection method is used in the prior art, and to provide a fuel cell sealing assembly and a fuel cell containing the assembly.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This utility model provides a fuel cell sealing assembly, which includes a housing, a sealing base, an electrode, and a wedge-shaped seal. The sealing base is disposed on the housing and has a first through hole. The wedge-shaped seal has a second through hole. The first through hole and the second through hole are sleeved on the electrode. The wall of the first through hole has a slope that matches the wedge-shaped seal. The wedge-shaped seal is an elastic element. The wedge-shaped seal extends into the first through hole. The outer wall of the wedge-shaped seal is in close contact with the slope, and the inner wall of the wedge-shaped seal presses against the electrode.

[0006] In this design, a bevel matching the wedge-shaped seal is provided on the wall of the first through hole of the sealing base. This allows the outer wall of the wedge-shaped seal to fit tightly against the bevel when inserted into the first through hole, while the inner wall presses against the electrode. The elastic deformation of the wedge-shaped seal creates an interference fit. This structure achieves sealing of the fuel cell stack cavity and improves its sealing effect, thus meeting the IP67 requirement for the fuel cell stack cavity. It also significantly reduces installation difficulty and assembly costs.

[0007] Preferably, the fuel cell sealing assembly further includes a pressure plate, which is disposed on the sealing base and presses against the wedge-shaped seal.

[0008] In this scheme, by setting a pressure plate, the pressure plate can squeeze the wedge-shaped seal downward, thereby making the wedge-shaped seal more tightly contacted with the wall of the first through hole and the electrode, and further improving the sealing effect of the fuel cell stack cavity.

[0009] Preferably, the pressure plate includes a first pressure plate and a second pressure plate, the first pressure plate has a third through hole, the electrode passes through the third through hole, and the second pressure plate abuts against the electrode.

[0010] In this scheme, since the upper end of the electrode is usually larger than the lower end, the installation of the pressure plate can be made easier by setting a split pressure plate consisting of a first pressure plate and a second pressure plate, thus avoiding the difficulty of installing the pressure plate as a whole.

[0011] Preferably, there is a stepped pressure plate between the first pressure plate and the second pressure plate.

[0012] In this scheme, by setting up a stepped combination of the first and second pressure plates, the uniformity of force distribution on the entire pressure surface can be improved.

[0013] Preferably, the first pressure plate and the second pressure plate are detachably connected.

[0014] In this solution, the ease of installation of the pressure plates can be further improved by using a detachable connection between the first and second pressure plates.

[0015] Preferably, the housing has a placement opening, the sealing base extends into the placement opening, and a shoulder is provided at the bottom of the sealing base, the shoulder abutting against the inside of the housing.

[0016] In this design, the purging action within the fuel cell stack cavity creates a positive pressure, causing the sealing base to be subjected to pressure from the inside out. By setting a shoulder at the bottom of the sealing base that abuts against the housing, the sealing base can be effectively prevented from being pushed out, thus affecting the sealing effect.

[0017] Preferably, the shoulder is provided with a connecting hole, and the sealing base is bolted to the housing.

[0018] In this solution, by providing a connection hole on the shoulder, a locking and fixed connection can be achieved between the sealing base and the housing, thereby improving the strength of the connection.

[0019] Preferably, a sealing ring is provided on the shoulder.

[0020] In this solution, by setting a sealing ring on the shoulder and using the locking and fixing of the housing and the shoulder of the sealing base to compress the sealing ring, the sealing effect of the fuel cell stack cavity can be further improved.

[0021] Preferably, the material of the wedge-shaped seal is silicone or rubber.

[0022] In this design, since plastics and rubber have good deformation capabilities, using wedge-shaped seals made of plastic or rubber can make installation easier, the two sides fit more tightly, and thus improve the sealing effect of the entire fuel cell stack cavity.

[0023] A fuel cell comprising a fuel cell sealing assembly as described above.

[0024] In this design, a bevel matching the wedge-shaped seal is provided on the wall of the first through hole of the sealing base. This allows the outer wall of the wedge-shaped seal to fit tightly against the bevel when inserted into the first through hole, while the inner wall presses against the electrode. The elastic deformation of the wedge-shaped seal creates an interference fit. This structure achieves sealing of the fuel cell stack cavity and improves its sealing effect, thus meeting the IP67 requirement for the fuel cell stack cavity. It also significantly reduces installation difficulty and assembly costs.

[0025] The positive and progressive effects of this utility model are as follows:

[0026] This invention discloses a fuel cell sealing assembly and a fuel cell containing it. By providing an inclined surface on the wall of the first through hole of the sealing base that matches a wedge-shaped seal, the outer wall of the wedge-shaped seal can tightly fit against the inclined surface when inserted into the first through hole, while the inner wall compresses the electrode. The elastic deformation of the wedge-shaped seal creates an interference fit. This structure achieves sealing of the fuel cell stack cavity and improves its sealing effect, thus meeting the IP67 requirement for the fuel cell stack cavity. Simultaneously, it significantly reduces installation difficulty and assembly costs. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the fuel cell sealing assembly of this utility model.

[0028] Figure 2 This is a partial structural schematic diagram of the fuel cell sealing assembly of this utility model.

[0029] Figure 3 This is a schematic diagram of the sealing base of the fuel cell sealing assembly of this utility model.

[0030] Figure 4 This is a schematic diagram of the wedge-shaped seal of the fuel cell sealing assembly of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] Fuel cell sealing assembly 100

[0033] Casing 1

[0034] Cover plate 11

[0035] Placement port 12

[0036] Sealed base 2

[0037] First through hole 21

[0038] Shoulder 22

[0039] Electrode 3

[0040] Wedge seal 4

[0041] Second through hole 41

[0042] Pressure plate 5

[0043] First pressure plate 51

[0044] Third through hole 511

[0045] Second pressure plate 52 Detailed Implementation

[0046] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0047] This embodiment provides a fuel cell sealing assembly 100, such as Figure 1 and Figure 2 As shown, it includes a housing 1, a sealing base 2, an electrode 3, and a wedge-shaped seal 4. The sealing base 2 is disposed on the housing 1, as shown. Figure 3 As shown, a first through hole 21 is opened on the sealing base 2, and a second through hole 41 is opened on the wedge-shaped seal 4. The first through hole 21 and the second through hole 41 are sleeved on the electrode 3. The wall of the first through hole 21 has a slope that matches the wedge-shaped seal 4. The wedge-shaped seal 4 is an elastic element. The wedge-shaped seal 4 extends into the first through hole 21. The outer wall of the wedge-shaped seal 4 is in close contact with the slope, and the inner wall of the wedge-shaped seal 4 squeezes the electrode 3.

[0048] Thus, by providing an inclined surface on the wall of the first through hole 21 of the sealing base 2 that matches the wedge-shaped seal 4, the outer wall of the wedge-shaped seal 4 can fit tightly against the inclined surface when inserted into the first through hole 21, while the inner wall compresses the electrode 3. The elastic deformation of the wedge-shaped seal 4 is used to form an interference fit. This structure achieves sealing of the fuel cell stack cavity and improves its sealing effect, thereby meeting the IP67 requirement of the fuel cell stack cavity, while also significantly reducing installation difficulty and assembly costs.

[0049] In this embodiment, a placement opening 12 is provided on the cover plate 11 of the housing 1, and a sealing base 2 is disposed on the placement opening 12. The sealing base 2 can extend into the placement opening 12 or cover the placement opening 12. The matching of the inclined surface of the hole wall of the first through hole 21 with the wedge-shaped seal 4 means that the hole wall of the first through hole 21 and the outer wall of the wedge-shaped seal 4 have complementary inclination angles to achieve a tight fit.

[0050] like Figure 1 and Figure 4 As shown, the cross-section of the wedge-shaped seal 4 gradually decreases from one end to the other in the vertical direction to form a wedge shape, and a second through hole 41 is provided on the wedge-shaped seal 4. The electrode 3 passes through both the first through hole 21 of the sealing base 2 and the second through hole 41 of the wedge-shaped seal 4.

[0051] Specifically, the fuel cell sealing assembly 100 also includes a pressure plate 5, which is disposed on the sealing base 2 and presses against the wedge-shaped seal 4.

[0052] Thus, by setting the pressure plate 5, the pressure plate 5 can press down on the wedge-shaped seal 4, thereby making the wedge-shaped seal 4 more tightly contact the wall of the first through hole 21 and the electrode 3, and further improving the sealing effect of the fuel cell stack cavity.

[0053] In this embodiment, the pressure plate 5 is a split-type pressure plate 5, including a first pressure plate 51 and a second pressure plate 52. The first pressure plate 51 has a third through hole 511 through which the electrode 3 passes, and the second pressure plate 52 abuts against the electrode 3. Since the upper end of the electrode 3 is usually larger than the lower end, by setting a split-type pressure plate 5 composed of the first pressure plate 51 and the second pressure plate 52, the difficulty of installing the pressure plate 5 as a whole can be avoided, and the convenience of installing the pressure plate 5 can be improved. For example, Figure 1 and Figure 2 As shown, the first pressure plate 51 and the second pressure plate 52 can be combined in a stepped manner. The bottom of the first pressure plate 51 protrudes to form a step, and the second pressure plate 52 has a corresponding size to match the step of the first pressure plate 51, so that the two can be precisely joined to form a complete cube. That is, the first pressure plate 51 is "L"-shaped, and the second pressure plate 52 is a horizontal block that fills the step of the "L"-shaped first pressure plate 51. By setting the first pressure plate 51 and the second pressure plate 52 in a stepped combination, the uniformity of force on the entire pressure surface can be improved. In other embodiments, those skilled in the art can use other split pressure plate forms 5.

[0054] Specifically, the first pressure plate 51 and the second pressure plate 52 are detachably connected.

[0055] Thus, by adopting a detachable connection between the first pressure plate 51 and the second pressure plate 52, the ease of installation of the pressure plate 5 can be further improved.

[0056] In this embodiment, bolt holes are provided on the first pressure plate 51 and the second pressure plate 52, and the first pressure plate 51 and the second pressure plate 52 are detachably connected by bolts. In other embodiments, those skilled in the art can use other detachable connection methods.

[0057] Specifically, such as Figure 1 and Figure 3 As shown, the sealing base 2 extends into the placement port 12, and a shoulder 22 is provided at the bottom of the sealing base 2, which abuts against the inside of the housing 1.

[0058] Thus, due to the purging effect inside the fuel cell stack cavity, a positive pressure is created inside the stack cavity, causing the sealing base 2 to be subjected to pressure from the inside out. By setting a shoulder 22 at the bottom of the sealing base 2 that abuts against the inside of the housing 1, the sealing base 2 can be effectively prevented from being pushed out, thereby affecting the sealing effect.

[0059] In this embodiment, the shoulder 22 can be a boss extending horizontally to both sides from the bottom of the sealing base 2, or it can be a flange extending outwards from the bottom of the sealing base 2. Preferably, the shoulder 22 is a flange extending outwards from the sealing base 2. This structure can increase the contact area between the shoulder 22 and the housing 1, thereby increasing the stability of the shoulder 22 against the housing 1.

[0060] Specifically, a connection hole is provided on the shoulder 22, and the sealing base 2 is bolted to the housing 1.

[0061] Thus, by providing a connection hole on the shoulder 22, a locking and fixed connection can be achieved between the sealing base 2 and the housing 1, improving the strength of the connection.

[0062] In this embodiment, the shoulder 22 can also be connected by a pin. In other embodiments, those skilled in the art can also use other connection methods.

[0063] Specifically, a sealing ring is provided on the shoulder 22.

[0064] Thus, by setting a sealing ring on the shoulder 22 and using the locking and fixing of the housing 1 and the shoulder 22 of the sealing base 2 to compress the sealing ring, the sealing effect of the fuel cell stack cavity can be further improved.

[0065] In this embodiment, the sealing ring is an "O"-shaped sealing ring that surrounds the sealing base 2. The material of the sealing ring is preferably plastic or rubber, and it can be molded to achieve good control over product quality and size.

[0066] Specifically, the material of the wedge seal 4 is silicone or rubber.

[0067] Thus, since plastics and rubber have good deformation capabilities, using wedge-shaped seals made of plastic or rubber can make installation easier, the two sides fit more tightly, and thus improve the sealing effect of the entire fuel cell cavity.

[0068] In this embodiment, the wedge-shaped seal 4 can be formed by mold processing, so that the product quality and size can be well controlled.

[0069] This embodiment also provides a fuel cell, which includes the fuel cell sealing assembly 100 as described above.

[0070] Therefore, by setting an inclined surface on the wall of the first through hole 21 of the sealing base 2 that matches the wedge-shaped seal 4, the outer wall of the wedge-shaped seal 4 can fit tightly against the inclined surface when inserted into the first through hole 21, while the inner wall compresses the electrode 3. The elastic deformation of the wedge-shaped seal 4 is used to form an interference fit. This structure achieves sealing of the fuel cell stack cavity and improves its sealing effect, thereby meeting the IP67 requirement of the fuel cell stack cavity, while also greatly reducing installation difficulty and assembly cost.

[0071] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A fuel cell sealing assembly, characterized in that, It includes a housing, a sealing base, an electrode, and a wedge-shaped seal. The sealing base is disposed on the housing and has a first through hole. The wedge-shaped seal has a second through hole. The first through hole and the second through hole are fitted onto the electrode. The wall of the first through hole has a slope that matches the wedge-shaped seal. The wedge-shaped seal is an elastic element. The wedge-shaped seal extends into the first through hole. The outer wall of the wedge-shaped seal is in close contact with the slope, and the inner wall of the wedge-shaped seal presses against the electrode.

2. The fuel cell sealing assembly as described in claim 1, characterized in that, The fuel cell sealing assembly also includes a pressure plate, which is disposed on the sealing base and presses against the wedge-shaped seal.

3. The fuel cell sealing assembly as described in claim 2, characterized in that, The pressure plate includes a first pressure plate and a second pressure plate. The first pressure plate has a third through hole through which the electrode passes, and the second pressure plate abuts against the electrode.

4. The fuel cell sealing assembly as described in claim 3, characterized in that, The bottom of the first pressure plate protrudes to form a step, and the second pressure plate is disposed on the step of the first pressure plate.

5. The fuel cell sealing assembly as described in claim 3 or 4, characterized in that, The first pressure plate and the second pressure plate are detachably connected.

6. The fuel cell sealing assembly as claimed in claim 1, characterized in that, The housing has a placement opening, the sealing base extends into the placement opening, and a shoulder is provided at the bottom of the sealing base, the shoulder abutting against the inside of the housing.

7. The fuel cell sealing assembly as claimed in claim 6, characterized in that, A connecting hole is provided on the shoulder, and the sealing base is bolted to the housing.

8. The fuel cell sealing assembly as claimed in claim 7, characterized in that, A sealing ring is provided on the shoulder.

9. The fuel cell sealing assembly as claimed in claim 1, characterized in that, The wedge-shaped seal is made of silicone or rubber.

10. A fuel cell, characterized in that, It includes the fuel cell sealing assembly as described in any one of claims 1-9.

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