Fuel cell sealing device and fuel cell comprising same

Abstract

The utility model provides a fuel cell sealing device and a fuel cell comprising the same, the fuel cell sealing device comprises a galvanic pile shell, an electrode and a sealing piece, the galvanic pile shell is provided with a connecting port, the sealing piece is provided with a through hole and is sleeved on the electrode, the sealing piece extends into the connecting port, and the connecting port is connected with the sealing piece. The sealing element is an elastic element, the sealing element is in interference fit with the galvanic pile shell, and the sealing element is in interference fit with the electrode. The fuel cell comprises the fuel cell sealing device. The elastic sealing element is inserted into the connecting port of the galvanic pile shell through elastic compression of the sealing element, interference fit is formed between the sealing element and the galvanic pile shell, and similarly, interference fit is also formed between the sealing element and the electrode. By adopting the structure, the sealing effect of the galvanic pile shell is improved, and meanwhile, the mounting difficulty and the assembly cost are greatly reduced.

Description

Technical Field

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

[0002] Because fuel cell stacks have very high output currents, typically exceeding 500A, and some even reaching 1000A, connecting the fuel cell stack and the DC-DC converter using plugs and wires is extremely difficult and cumbersome. Currently, high-current fuel cell stacks are usually directly connected to the DC converter via electrodes. However, since both the fuel cell stack cavity and the DC cavity must meet the IP67 standard, meaning both the fuel cell stack cavity and the DC cavity must be individually sealed, the existing direct electrode connection method results in poor sealing of the fuel cell cavity and high assembly costs. 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 device and a fuel cell containing the same.

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

[0005] This utility model provides a fuel cell sealing device, which includes a fuel cell stack housing, electrodes and sealing elements. The fuel cell stack housing has a connection port, the sealing element has a through hole and is sleeved on the electrodes, the sealing element extends into the connection port, the sealing element is an elastic element, the sealing element and the fuel cell stack housing are interference fit, and the sealing element and the electrodes are interference fit.

[0006] In this design, an elastic seal is used. The seal's elastic compression allows it to be inserted into the connection port of the fuel cell stack housing, creating an interference fit between the seal and the housing. Similarly, the elastic compression of the seal allows the electrode to be inserted into the through-hole, also creating an interference fit between the seal and the electrode. This structure improves the sealing effect of the fuel cell stack housing while significantly reducing installation difficulty and assembly costs.

[0007] Preferably, the contact portion between the seal and the fuel cell housing is chamfered; and / or, the contact portion between the seal and the electrode is chamfered.

[0008] In this design, since the seal is interference-fitted with the fuel cell housing and electrodes, the chamfering makes it easier to insert the seal into the connection port and fit it onto the electrodes, further improving the ease of installation.

[0009] Preferably, the chamfer is sealed with adhesive.

[0010] In this solution, by setting a chamfer, a chamfered area is formed at the connection between the seal and the fuel cell housing and the electrode. A secondary seal is performed by applying adhesive within the chamfered area, which can further improve the sealing effect.

[0011] Preferably, the bottom of the seal is provided with a shoulder, which abuts against the inner side of the fuel cell housing.

[0012] In this design, the purging action within the fuel cell stack cavity creates positive pressure, causing the seals to be subjected to pressure from the inside out. By setting a shoulder at the bottom of the seal that abuts against the stack housing, the seals can be effectively prevented from being pushed out, thus affecting the sealing effect.

[0013] Preferably, the material of the seal is plastic or rubber.

[0014] In this solution, since plastics and rubber have good deformation capabilities, using seals made of plastic or rubber materials can make installation easier.

[0015] Preferably, a groove is provided on the fuel cell housing along the edge of the connection port.

[0016] In this solution, a groove is provided along the edge of the connector to enable connection with a DC component.

[0017] Preferably, a sealing ring is provided in the groove.

[0018] In this design, a sealing ring is placed inside the groove to improve the sealing effect between the fuel cell stack housing and the DC component.

[0019] Preferably, the sealing ring is made of rubber or silicone.

[0020] In this solution, since rubber or silicone has good deformation ability, using sealing rings made of plastic or rubber can make installation easier.

[0021] Preferably, a fixing part is provided on the fuel cell housing, and the fixing part is connected to the DC component.

[0022] In this design, by providing a fixing part on the fuel cell stack housing, the fuel cell stack housing can be fixed when connected to the DC component, thereby improving the stability of the connection between the fuel cell stack housing and the DC component. At the same time, this structure, which directly fixes the DC component to the fuel cell stack housing, reduces the length of the electrodes and eliminates the need for plug-ins and wires, resulting in a significant cost reduction.

[0023] A fuel cell comprising the fuel cell sealing device as described above.

[0024] In this design, an elastic seal is used. The seal's elastic compression allows it to be inserted into the connection port of the fuel cell stack housing, creating an interference fit between the seal and the housing. Similarly, the elastic compression of the seal allows the electrode to be inserted into the through-hole, also creating an interference fit between the seal and the electrode. This structure improves the sealing effect of the fuel cell stack housing while significantly reducing 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 device and a fuel cell containing the same. By using an elastic sealing element, the sealing element is inserted into the connection port of the fuel cell stack housing through elastic compression, forming an interference fit between the sealing element and the fuel cell stack housing. Similarly, the elastic compression of the sealing element allows the electrode to be inserted into the through hole, also forming an interference fit between the sealing element and the electrode. This structure improves the sealing effect of the fuel cell stack housing while significantly reducing installation difficulty and assembly costs. Attached Figure Description

[0027] Figure 1 This is a perspective view of the fuel cell sealing device of this utility model.

[0028] Figure 2 This is a perspective view of the fuel cell stack housing of this utility model.

[0029] Figure 3 This is a perspective view of the sealing element of this utility model.

[0030] Figure 4 This is an assembly drawing of the seal and electrode of this utility model.

[0031] Figure 5 This is a partial cross-sectional view of the fuel cell sealing device of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] Fuel cell sealing device 100

[0034] fuel cell stack casing 1

[0035] Top plate 11

[0036] Connector 12

[0037] Fixing part 13

[0038] Groove 14

[0039] Electrode 2

[0040] Seal 3

[0041] Through hole 31

[0042] 32 chamfer

[0043] Chamfering interval 321

[0044] Shoulder 33 Detailed Implementation

[0045] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0046] This embodiment provides a fuel cell sealing device 100, such as... Figure 1 and Figure 2 As shown, it includes a fuel cell stack housing 1, electrodes 2, and a sealing element 3. The fuel cell stack housing 1 has a top plate 11 with a connection port 12. The electrodes 2 include a positive electrode and a negative electrode, as shown in the figure. Figure 3 and Figure 4 As shown, the sealing element 3 has two through holes 31 and is respectively fitted onto the positive electrode and the negative electrode. The sealing element 3 extends into the connection port 12. The sealing element 3 is an elastic element. The sealing element 3 and the stack housing 1 are interference fit. The sealing element 3 and the electrode 2 are interference fit.

[0047] Thus, by using the elastic seal 3, the seal 3 is inserted into the connection port 12 of the fuel cell housing 1 through elastic compression, forming an interference fit between the seal 3 and the fuel cell housing 1. Similarly, the electrode 2 is inserted into the through hole 31 through elastic compression, also forming an interference fit between the seal 3 and the electrode 2. This structure improves the sealing effect of the fuel cell housing 1, while significantly reducing installation difficulty and assembly costs.

[0048] In this embodiment, the material of the seal 3 is preferably plastic or rubber, and it can be formed by molding or machining, so that the product quality and size can be well controlled.

[0049] Specifically, such as Figure 3 and Figure 4 As shown, the contact portion between the seal 3 and the top plate 11 of the fuel cell housing 1 is provided with a chamfer 32; or, the contact portion between the seal 3 and the electrode 2 is provided with a chamfer 32; or, the contact portions between the seal 3 and the fuel cell housing 1 and the electrode 2 are both provided with a chamfer 32.

[0050] Thus, since the seal 3 is interference-fitted with the top plate 11 of the fuel cell housing 1 and the electrode 2, the chamfer 32 makes it easier to insert the seal 3 into the connection port 12 and fit it onto the electrode 2, further improving the ease of installation.

[0051] In this embodiment, preferably, the contact portions between the seal 3 and the top plate 11 of the fuel cell housing 1 and the electrode 2 are all provided with chamfers 32.

[0052] Specifically, a dotted sealant is applied at chamfer 32.

[0053] Thus, by setting the chamfer 32, a chamfered section 321 is formed at the connection between the sealant 3 and the top plate 11 and the electrode 2. Applying adhesive for secondary sealing within the chamfered section 321 further improves the sealing effect. The sealing adhesive can be silicone or epoxy.

[0054] Specifically, such as Figure 5 As shown, the bottom of the seal 3 is provided with a shoulder 33, which abuts against the inner side of the fuel cell housing 1.

[0055] Thus, due to the purging effect inside the fuel cell stack cavity, a positive pressure is created inside the cavity, causing the seal 3 to be subjected to pressure from the inside out. By setting a shoulder 33 at the bottom of the seal 3 that abuts against the inside of the stack housing 1, the seal 3 can be effectively prevented from being pushed out, thereby affecting the sealing effect.

[0056] In this embodiment, the shoulder 33 can be a boss extending horizontally to both sides from the bottom of the seal 3, or it can be a flange extending outwards from the bottom of the seal 3. Preferably, the shoulder 33 is a flange extending outwards from the bottom of the seal 3. This structure can increase the contact area between the shoulder 33 and the fuel cell housing 1, thereby increasing the stability of the shoulder 33 against the fuel cell housing 1.

[0057] Specifically, such as Figure 2 As shown, a groove 14 is provided on the upper edge of the connection port 12 of the fuel cell stack housing 1.

[0058] Thus, by providing a groove 14 along the edge of the connection port 12, a connection with a DC component can be achieved.

[0059] In this embodiment, a sealing ring is provided within the groove 14. Providing a sealing ring within the groove 14 improves the sealing effect between the fuel cell stack housing 1 and the DC assembly. Preferably, the sealing ring is made of rubber or silicone. Because rubber or silicone has good deformation capacity, using a sealing ring made of rubber or silicone makes installation easier. Preferably, the sealing ring can be made of fluorosilicone rubber, EPDM, etc.

[0060] Specifically, a fixing part 13 is provided on the fuel cell housing 1, and the fixing part 13 is connected to the DC component.

[0061] Thus, by providing a fixing part 13 on the fuel cell stack housing 1, the fuel cell stack housing 1 can be fixed when connected to the DC component, thereby improving the stability of the connection between the fuel cell stack housing 1 and the DC component. At the same time, by adopting such a structure that directly fixes the DC component to the fuel cell stack housing 1, the length of the electrode 2 can be reduced and the use of plug-ins and wires can be avoided, achieving a significant cost reduction effect.

[0062] In this embodiment, the fixing part 13 consists of several bolt holes provided on the top plate 11 of the fuel cell stack housing 1, allowing the DC component to be directly fixed to the fuel cell stack housing 1 using bolts. In other embodiments, those skilled in the art can use other methods to connect the DC component to the fuel cell stack housing 1.

[0063] This embodiment also provides a fuel cell, which includes the fuel cell sealing device 100 as described above.

[0064] Therefore, by using the elastic seal 3, the seal 3 is inserted into the connection port 12 of the fuel cell housing 1 through elastic compression, forming an interference fit between the seal 3 and the fuel cell housing 1. Similarly, the electrode 2 is inserted into the through hole 31 through elastic compression, also forming an interference fit between the seal 3 and the electrode 2. This structure improves the sealing effect of the fuel cell housing 1, while significantly reducing installation difficulty and assembly costs.

[0065] 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 device, characterized in that, It includes a fuel cell stack housing, electrodes, and seals. The fuel cell stack housing has a connection port, the seals have a through hole and are sleeved on the electrodes, the seals extend into the connection port, the seals are elastic, the seals are interference-fitted with the fuel cell stack housing, and the seals are interference-fitted with the electrodes. The bottom of the seal is provided with a shoulder, which abuts against the inner side of the fuel cell housing.

2. The fuel cell sealing device as described in claim 1, characterized in that, The contact portion between the seal and the fuel cell housing is chamfered; And / or, the contact portion of the seal with the electrode is chamfered.

3. The fuel cell sealing device as described in claim 2, characterized in that, The chamfered area is sealed with adhesive.

4. The fuel cell sealing device as described in claim 1, characterized in that, The sealing element is made of plastic or rubber.

5. The fuel cell sealing device as described in claim 1, characterized in that, A groove is provided on the fuel cell stack housing along the edge of the connection port.

6. The fuel cell sealing device as described in claim 5, characterized in that, A sealing ring is provided inside the groove.

7. The fuel cell sealing device as described in claim 6, characterized in that, The sealing ring is made of rubber or silicone.

8. The fuel cell sealing device as described in claim 1, characterized in that, A fixing part is provided on the fuel cell housing, and the fixing part is connected to the DC component.

9. A fuel cell, characterized in that, It includes the fuel cell sealing device as described in any one of claims 1-8.

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