CN220543953U - Sealing structure of fuel cell manifold cooling liquid sealing surface and cell package - Google Patents

Abstract

The utility model provides a sealing structure of a cooling liquid sealing surface of a fuel cell manifold and a cell pack, comprising the following components: the sealing element, the insulating plate, the end plate, the sealing ring and the packaging shell; the battery is placed in the packaging shell, the end plate is arranged at the opening end of the packaging shell, the battery is provided with an insulating plate, the end plate is provided with a through hole, and the insulating plate is partially positioned in the through hole; the sealing ring is arranged between the end plate and the insulating plate; the sealing piece is arranged between the manifold and the end plate and between the insulating plate and is arranged at the connecting position of the insulating plate and the end plate. The sealing structure has larger top two-peak span, and the stepped sealing groove structure is matched, so that the electric gap and the creepage distance are increased, the insulating performance of the fuel cell under severe working conditions such as rain, scouring and the like is improved, and the safety and the reliability of the fuel cell are improved.

Description

Sealing structure of fuel cell manifold cooling liquid sealing surface and cell package

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a sealing structure of a cooling liquid sealing surface of a fuel cell manifold and a cell pack, and especially relates to a sealing structure with high insulation reliability of the cooling liquid sealing surface of the fuel cell manifold.

Background

The fuel cell is used as a novel power generation device for generating electric energy through electrochemical reaction of oxygen and hydrogen. The peak current exceeds 700A, and is far beyond the human body safety current by 10mA. Electrical insulation performance is receiving a great deal of attention as an important indicator of fuel cell safety. The sealing of the fuel cell manifold cooling liquid pipeline in the industry adopts an O-shaped ring or a conventional sealing piece, and outside water vapor is conducted with the medium in the fuel cell cooling liquid pipeline in a humid environment, so that insulation failure is easy to occur, and the operation of the fuel cell is influenced.

Publication number CN113675426a provides a combined sealing structure for a fuel cell module, including a fuel cell end plate, a package case, and a manifold; the fuel cell end plate is positioned in the packaging box body; the adapter plate is embedded into the packaging box body, one side end face of the adapter plate is fixedly arranged on the fuel cell end plate, and a medium sealing ring I is arranged between the fuel cell end plate and the adapter plate; a notch is formed in the side face of the adapter plate, a sealing groove is formed between the notch and the chamfer face of the packaging box body, and an IP protective sealing O ring is arranged in the sealing groove; the end face of the other side of the adapter plate is fixedly connected with the manifold, and a medium sealing ring II is arranged between the adapter plate and the manifold. Publication number CN211858804U discloses a hydrogen fuel cell engine fluid distribution manifold board penetrating seal structure, including distribution manifold, bottom plate, insulating seat, lock nut, sealing washer and blotter, distribution manifold passes the bottom plate, the insulating seat is located between distribution manifold and the bottom plate, before insulating seat and the distribution manifold are located to the sealing washer, the insulating seat is the cavity ladder-shaped axle, including major diameter axle and minor diameter axle, sealing washer and buffer cushion locate on the minor diameter axle, the bottom plate is located between sealing washer and the blotter, be equipped with the external screw thread that uses with the lock nut cooperation on the minor diameter axle, lock through the lock nut between distribution manifold, insulating seat and the bottom plate.

The patent document discloses that an O-shaped ring or a conventional sealing piece is used for sealing a cooling liquid pipeline of a fuel cell manifold, external water vapor can directly enter the outer side of the O-shaped ring or the conventional sealing piece through a gap between an end plate and a manifold mounting surface, and as the sealing interface of the O-shaped ring and the conventional sealing piece is smaller in width, the electrical gap is insufficient, insulation faults are easy to occur in a humid environment, the O-shaped ring and the like have no anti-drop design, and the O-shaped ring is easy to rebound and drop after being mounted, so that the large-scale production and the later maintenance of the fuel cell are not facilitated.

Disclosure of Invention

In view of the defects in the prior art, the utility model aims to provide a sealing structure of a cooling liquid sealing surface of a fuel cell manifold and a cell pack.

According to the present utility model, there is provided a sealing structure for a coolant sealing surface of a fuel cell manifold, comprising: the sealing element, the insulating plate, the end plate, the sealing ring and the packaging shell;

the battery is placed in the packaging shell, the end plate is arranged at the opening end of the packaging shell, the battery is provided with an insulating plate, the end plate is provided with a through hole, and the insulating plate is partially positioned in the through hole;

the sealing ring is arranged between the end plate and the insulating plate; the sealing piece is arranged between the manifold and the end plate and between the insulating plate and is arranged at the connecting position of the insulating plate and the end plate.

Preferably, the sealing member includes a first sealing block, a second sealing block, and a connection block connecting the first sealing block and the second sealing block;

a first groove body structure and a second groove body structure are formed among the first sealing block, the second sealing block and the connecting block, and the first groove body structure and the second groove body structure are positioned on two sides of the connecting block;

the first sealing block is located between the manifold and the end plate, the second sealing block is located between the manifold and the insulating plate, and the connecting block covers the joint of the insulating plate and the end plate.

Preferably, the end plate is provided with a third groove body structure, the insulating plate is provided with a fourth groove body structure, and the manifold is provided with a stepped sealing groove;

the first sealing block is positioned in one groove body structure of the third groove body structure and the stepped sealing groove, and the second sealing block is positioned in the other groove body structure of the fourth groove body structure and the stepped sealing groove;

the protruding structure of step seal groove is located in the first cell body structure, a side wall structure of the third cell body structure and a side wall structure of the fourth cell body structure are located in the second cell body structure.

Preferably, the seal is generally H-shaped.

Preferably, the insulating plate includes a connection portion and a protrusion portion;

the convex part is arranged on the connecting part, the connecting part is connected with the battery, and the convex part is positioned in the through hole;

the sealing ring is arranged between the end plate and the connecting part, and the sealing piece is arranged between the manifold and the end plate and between the bulge and corresponds to the connecting position of the bulge and the end plate.

Preferably, a fifth groove body structure is arranged on the end plate, and the sealing ring is arranged in the fifth groove body structure.

Preferably, the end plate and the packaging shell are fixedly connected through bolts.

Preferably, the sealing ring is an O-ring.

Preferably, the sealing element is provided with an anti-falling bump.

The utility model also provides a battery, which comprises the sealing structure of the cooling liquid sealing surface of the fuel battery manifold.

Compared with the prior art, the utility model has the following beneficial effects:

1. the cross section of the sealing element is H-shaped, and spans the end plate and the insulating plate of the fuel cell, and the two peak spans at the top of the novel sealing element are larger, so that the electric gap between the electrified part of the reactor core of the fuel cell and water vapor of an external conductor is increased, and the insulating protection capability of the fuel cell in severe environments such as rain, scouring and the like can be greatly improved;

2. the sealing element structure adopts an anti-drop design, and a plurality of groups of anti-drop convex points are arranged on two sides of the sealing element, so that the sealing element does not rebound or drop after being installed, the assemblability of the sealing element is improved, and the fuel cell mass production and the later maintenance are facilitated;

3. the sealing element provided by the utility model has the advantages of medium sealing and IP sealing effects of the fuel cell cooling liquid pipeline, and is safe and reliable.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a fuel cell manifold coolant sealing surface seal;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 without a seal;

FIG. 4 is a block diagram of a seal;

fig. 5 is an assembly view of a fuel cell;

fig. 6 is an exploded view of the fuel cell.

The figure shows:

manifold 1 connection 401

Stepped seal groove 101 boss 402

Fourth groove structure 403 of seal 2

End plate 5 of first seal block 201

Second seal block 202 perforations 501

Third groove structure 502 of connection block 203

First channel structure 204 fifth channel structure 503

Second groove body structure 205 sealing ring 6

Anti-drop bump 206 packaging shell 7

Bolt 3 battery 8

Insulating plate 4

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

Example 1:

as shown in fig. 1 to 6, the present embodiment provides a fuel cell manifold cooling liquid seal face seal structure including: the battery pack comprises a sealing piece 2, an insulating plate 4, an end plate 5, a sealing ring 6 and a packaging shell 7, wherein a battery 8 is placed in the packaging shell 7, the end plate 5 is arranged at the opening end of the packaging shell 7, the battery 8 is provided with the insulating plate 4, the end plate 5 is provided with a perforation 501, part of the insulating plate 4 is positioned in the perforation 501, and the sealing ring 6 is arranged between the end plate 5 and the insulating plate 4; the seal 2 is provided between the manifold 1 and the end plate 5, the insulating plate 4, and at a connection position of the insulating plate 4 and the end plate 5. The seal 2 is generally H-shaped.

The end plate 5 and the packaging shell 7 are fixedly connected through bolts 3. The sealing ring 6 is an O-shaped ring.

The insulating plate 4 includes connecting portion 401 and protruding portion 402, protruding portion 402 sets up on connecting portion 401, and connecting portion 401 and battery 8 connect the setting, and protruding portion 402 is located perforation 501, and sealing washer 6 sets up between end plate 5 and connecting portion 401, and sealing member 2 sets up between manifold 1 and end plate 5, protruding portion 402 to correspond protruding portion 402 and end plate 5's hookup location department setting.

The sealing member 2 comprises a first sealing block 201, a second sealing block 202 and a connecting block 203 for connecting the first sealing block 201 and the second sealing block 202, wherein a first groove body structure 204 and a second groove body structure 205 are formed among the first sealing block 201, the second sealing block 202 and the connecting block 203, the first groove body structure 204 and the second groove body structure 205 are positioned on two sides of the connecting block 203, the first sealing block 201 is positioned between the manifold 1 and the end plate 5, the second sealing block 202 is positioned between the manifold 1 and the insulating plate 4, and the connecting block 203 covers the connecting part of the insulating plate 4 and the end plate 5.

The end plate 5 is provided with a third groove body structure 502, the insulating plate 4 is provided with a fourth groove body structure 403, the manifold 1 is provided with a step type sealing groove 101, the first sealing block 201 is located in one groove body structure of the third groove body structure 502 and the step type sealing groove 101, the second sealing block 202 is located in the other groove body structure of the fourth groove body structure 403 and the step type sealing groove 101, the protruding structure of the step type sealing groove 101 is located in the first groove body structure 204, and one side wall structure of the third groove body structure 502 and one side wall structure of the fourth groove body structure 403 are located in the second groove body structure 205.

The end plate 5 is provided with a fifth groove structure 503, and the sealing ring 6 is arranged in the fifth groove structure 503.

The seal 2 is provided with an anti-drop bump 206.

The embodiment also provides a battery pack, which comprises the sealing structure of the cooling liquid sealing surface of the fuel cell manifold.

The embodiment aims at overcoming the defect of the insulating property of the cooling liquid sealing surface of the existing fuel cell manifold, and providing a sealing structure capable of remarkably improving the electric gap and creepage distance of a fuel cell, wherein the section of a sealing element is H-shaped, spans over a fuel cell end plate and an insulating plate, the top two peaks of the novel sealing element have larger span, and the electric gap between the electrified part of a fuel cell core and outside conductor water vapor is increased. And a single seal groove is arranged on the surfaces of the fuel cell end plate and the insulating plate, and a stepped seal groove is arranged on the surface of the manifold. The design of the stepped seal groove increases the creepage distance between the fuel cell coolant medium and the outside water vapor. Meanwhile, a plurality of groups of anti-falling convex points are arranged on two sides of the sealing element, so that the sealing element does not rebound or fall off after being installed, and the assemblability of the fuel cell is improved.

Example 2:

the present embodiment will be understood by those skilled in the art as a more specific description of embodiment 1.

As shown in fig. 1 to 6, the present embodiment provides a sealing structure capable of improving the high insulation reliability of the coolant sealing surface of the fuel cell manifold, which aims at the disadvantage of the insulation performance of the coolant sealing surface of the existing fuel cell manifold. The sealing structure provides higher electric gap and creepage distance, so that the fuel cell can still maintain good insulation performance in severe environmental scenes such as rain, scouring and the like.

The sealing structure comprises a manifold 1, a sealing piece 2, a bolt 3, an insulating plate 4, an end plate 5, a sealing ring 6, a packaging shell 7 and a battery 8. The sealing ring is an O-shaped ring, and the battery 8 is a single battery.

The cross section of the sealing element 2 is H-shaped, and spans the end plate 5 and the insulating plate 4, the inner side seals the fuel cell cooling liquid medium, the outer side has IP sealing function, and external water vapor is prevented from entering. The top two peaks of the seal 2 have a larger span and increase the electrical gap of the fuel cell.

A single seal groove is arranged on the surfaces of the insulating plate 4 and the end plate 5, and a stepped seal groove is arranged on the surface of the manifold 1. The design of ladder type seal groove has increased the creepage distance of electrified part of fuel cell reactor core and external steam, and protruding portion provides the side force support for sealing member 2 in the middle of the seal groove simultaneously, avoids sealing member 2 to take place the aversion under the inboard coolant medium pressure effect.

And a plurality of groups of anti-falling convex points are arranged on two sides of the sealing element 2, so that the sealing element is stably fixed inside the sealing groove after being installed, and is not easy to rebound and fall off.

The embodiment provides a sealing structure with high insulation reliability for a cooling liquid sealing surface of a fuel cell manifold, wherein the sealing structure is arranged between the fuel cell manifold and an end plate and spans across the fuel cell end plate and an insulating plate. The novel sealing structure seals cooling liquid medium on the inner side, prevents outside water vapor from invading on the outer side, and takes account of cooling liquid pipeline medium sealing and IP sealing effect. The novel sealing structure has larger top two-peak span, increases the electric gap and creepage distance, improves the insulation performance of the fuel cell under severe working conditions such as rain, scouring and the like, and improves the safety and reliability of the fuel cell. Meanwhile, the novel sealing structure adopts an anti-drop design, so that the assemblability of the fuel cell is improved.

The sealing interface width is smaller after the assembly, the electric gap and the creepage distance are insufficient, external water vapor is conducted with the medium in the cooling liquid pipeline of the fuel cell in a humid environment, insulation faults are easy to occur, the O-shaped ring and the like have no anti-drop design, rebound and drop are easy to occur after the installation, and the large-scale production and the later maintenance of the fuel cell are not facilitated. The sealing structure of the present embodiment solves the above-described problems.

The sealing structure has larger top two-peak span, increases the electric gap and creepage distance, improves the insulation performance of the fuel cell under severe working conditions such as rain, scouring and the like, and improves the safety and reliability of the fuel cell.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. A fuel cell manifold coolant sealing face seal structure, comprising: a sealing piece (2), an insulating plate (4), an end plate (5), a sealing ring (6) and a packaging shell (7);

the battery (8) is placed in the packaging shell (7), the end plate (5) is arranged at the opening end of the packaging shell (7), an insulating plate (4) is arranged on the battery (8), a through hole (501) is formed in the end plate (5), and the insulating plate (4) is partially positioned in the through hole (501);

the sealing ring (6) is arranged between the end plate (5) and the insulating plate (4); the sealing piece (2) is arranged between the manifold (1) and the end plate (5) and between the insulating plates (4) and corresponds to the connection position of the insulating plates (4) and the end plate (5).

2. The fuel cell manifold coolant sealing surface seal structure according to claim 1, wherein the seal (2) includes a first seal block (201), a second seal block (202), and a connection block (203) connecting the first seal block (201) and the second seal block (202);

a first groove body structure (204) and a second groove body structure (205) are formed among the first sealing block (201), the second sealing block (202) and the connecting block (203), and the first groove body structure (204) and the second groove body structure (205) are positioned on two sides of the connecting block (203);

the first sealing block (201) is located between the manifold (1) and the end plate (5), the second sealing block (202) is located between the manifold (1) and the insulating plate (4), and the connecting block (203) covers the joint of the insulating plate (4) and the end plate (5).

3. The fuel cell manifold coolant sealing surface seal structure according to claim 2, wherein a third groove structure (502) is provided on the end plate (5), a fourth groove structure (403) is provided on the insulating plate (4), and a stepped seal groove (101) is provided on the manifold (1);

the first sealing block (201) is located in one groove body structure of the third groove body structure (502) and the step-shaped sealing groove (101), and the second sealing block (202) is located in the other groove body structure of the fourth groove body structure (403) and the step-shaped sealing groove (101);

the protruding structure of the stepped seal groove (101) is located in the first groove body structure (204), and one side wall structure of the third groove body structure (502) and one side wall structure of the fourth groove body structure (403) are located in the second groove body structure (205).

4. The fuel cell manifold coolant sealing face seal arrangement according to claim 2, wherein the seal (2) is overall H-shaped.

5. The fuel cell manifold coolant sealing surface seal structure according to claim 1, wherein the insulating plate (4) includes a connecting portion (401) and a protruding portion (402);

the protruding part (402) is arranged on the connecting part (401), the connecting part (401) is connected with the battery (8), and the protruding part (402) is positioned in the through hole (501);

the sealing ring (6) is arranged between the end plate (5) and the connecting part (401), and the sealing piece (2) is arranged between the manifold (1) and the end plate (5) and between the protruding parts (402) and corresponds to the connecting positions of the protruding parts (402) and the end plate (5).

6. The fuel cell manifold coolant sealing face seal arrangement according to claim 1, wherein a fifth groove structure (503) is provided on the end plate (5), and the seal ring (6) is provided in the fifth groove structure (503).

7. The fuel cell manifold coolant sealing face seal structure according to claim 1, wherein the end plate (5) and the package case (7) are fixedly connected by bolts (3).

8. The fuel cell manifold coolant sealing face seal arrangement according to claim 1, wherein the seal ring (6) is an O-ring.

9. A fuel cell manifold coolant sealing surface seal according to claim 3, wherein the seal (2) is provided with a drop-off prevention bump (206).

10. A battery pack comprising the fuel cell manifold coolant sealing surface seal structure according to any one of claims 1 to 9.