CN217691247U

CN217691247U - Fuel cell stack manifold structure and fuel cell

Info

Publication number: CN217691247U
Application number: CN202221485775.9U
Authority: CN
Inventors: 李宪才; 白光金; 闪念; 徐云飞
Original assignee: Beijing Sinohytec Co Ltd
Current assignee: Beijing Sinohytec Co Ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-10-28
Anticipated expiration: 2032-06-15

Abstract

The utility model relates to a fuel cell technical field, concretely relates to fuel cell stack manifold structure and fuel cell, wherein, fuel cell stack manifold structure includes: the pipe body is arranged on the end plate, and an inlet of the pipe body corresponds to an air inlet on the end plate; the pipe body comprises a body and a first transition section, the first transition section is arranged close to the end plate, and the diameter of the first transition section is larger than that of the body; a second transition section disposed on the air inlet of the end plate. Due to the arrangement of the first transition section, the diameter of the first transition section is larger than that of the body, more air can be contained in the first transition section, so that the distribution uniformity of the air flow is changed, and meanwhile, due to the arrangement of the second transition section, the flow resistance of the air is changed to the maximum extent.

Description

Fuel cell stack manifold structure and fuel cell

Technical Field

The utility model relates to a fuel cell technical field, concretely relates to fuel cell stack manifold structure and fuel cell.

Background

The fuel cell is a device for directly converting chemical energy stored in fuel and oxidant into electric energy, has great advantages compared with traditional energy sources such as coal, petroleum, natural gas and the like, is an effective means for solving environmental pollution and energy crisis, the fuel of the fuel cell is generally hydrogen, methanol, methane and the like, and air or oxygen and the like are used as the oxidant.

In the technical field of fuel cells, as more fuel cells occupy more space, and in order to make better use of space, a large fuel cell stack needs to be divided into a plurality of small fuel cells, and the fuel cells are usually combined in series or in parallel. The design of the manifolds is critical for series or parallel stacks.

In the prior art, the manifolds are all independently integrated into a component module which is integrated between the stack and the box body, meanwhile, the inlet of each manifold is opposite to the air inlet on the end plate, but the air flow distribution of the manifolds is uneven, and meanwhile, the flow resistance is large.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the present invention is to overcome the problem of uneven air flow distribution of the manifold in the prior art and simultaneously, the problem of large flow resistance, thereby providing a fuel cell stack manifold structure and a fuel cell.

In order to solve the technical problem, the utility model provides a fuel cell stack manifold structure, include: the pipe body is arranged on the end plate, and an inlet of the pipe body corresponds to an air inlet on the end plate; the pipe body comprises a body and a first transition section, the first transition section is arranged close to the end plate, and the diameter of the first transition section is larger than that of the body; a second transition section disposed on the air inlet of the end plate.

Further, the second transition section includes a first plane and a second plane, the first plane and the second plane not being on the same plane.

Further, the joint of the first plane and the second plane is a smooth joint.

Further, the first plane coincides with a mouth wall of the air inlet.

Further, still be equipped with the link on the body, the link is close to first changeover portion sets up, the body pass through the link with the end plate is connected.

Further, the connecting end is a flange formed at one end of the first transition section, which is far away from the body.

Furthermore, a plurality of mounting holes are formed in the connecting end, and the pipe body and the end plate are connected through fasteners.

Further, the pipe body is an integrally formed part.

Further, the body is two, two the body is along the diagonal setting of end plate.

The utility model also provides a fuel cell, include fuel cell stack manifold structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a fuel cell stack manifold structure, include: the pipe body is arranged on the end plate, and an inlet of the pipe body corresponds to an air inlet on the end plate; the pipe body comprises a body and a first transition section, the first transition section is arranged close to the end plate, and the diameter of the first transition section is larger than that of the body; a second transition section disposed on the air inlet of the end plate.

Through setting up the body on the end plate to the entry of this body is direct to correspond the setting with the air number entry on the end plate, makes the air can directly enter into to this body through the entry of this body, runs through other structures in end plate and the fuel cell again and reacts. Due to the arrangement of the first transition section, the diameter of the first transition section is larger than that of the body, more air can be contained in the first transition section, so that the distribution uniformity of the air flow is changed, and meanwhile, due to the arrangement of the second transition section, the flow resistance of the air is changed to the maximum extent.

2. The utility model provides a fuel cell pile manifold structure, the second changeover portion includes first plane and second plane, first plane and second plane are not on the coplanar to guaranteed the air admission end plate thing, not direct air inlet through this end plate, but after the closed space that closes is enclosed through first plane, enclose the closed space that closes through the second plane again, make the air can be slow pass through the second changeover portion, and then reduce the flow resistance of air.

3. The utility model provides a fuel cell pile manifold structure, the junction of first plane and second plane is smooth connection, avoids appearing the cracked condition in the junction of first plane and second plane.

4. The utility model provides a fuel cell pile manifold structure, the body is integrated into one piece spare to guaranteed the intensity and the rigidity of this body, and then guaranteed the life of this body.

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a manifold structure of a fuel cell stack provided by the present invention;

FIG. 2 is a schematic structural view of the tube of FIG. 1;

FIG. 3 is a cross-sectional view of the tubular body of FIG. 1;

fig. 4 is a bottom view of fig. 1.

Description of reference numerals:

1-a pipe body;

2-body;

3-a first transition section;

4-connecting end;

5-mounting holes;

6-end plate;

7-an air inlet;

8-a second transition section;

9-a first plane;

10-second plane.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 4, the present invention provides a manifold structure of a fuel cell stack, including: the tube body 1 is arranged on the end plate 6, and the inlet of the tube body 1 corresponds to the air inlet 7 on the end plate 6; the pipe body 1 comprises a body 2 and a first transition section 3, the first transition section 3 is arranged close to the end plate 6, and the diameter of the first transition section 3 is larger than that of the body 2; and a second transition section 8 is arranged on the air inlet 7 of the end plate 6.

Through set up body 1 on end plate 6 to the entry of this body 1 is direct to correspond the setting with the air number entry on the end plate 6, makes the air can directly enter into this body 1 through the entry of this body 1, runs through other structures in end plate 6 and the fuel cell again and reacts. Due to the arrangement of the first transition section 3, and the diameter of the first transition section 3 is larger than that of the body 2, more air can be contained in the first transition section 3, so that the distribution uniformity of the air flow is changed, and meanwhile, due to the arrangement of the second transition section 8, the flow resistance of the air is changed to the maximum extent.

In some alternative embodiments, the second transition section 8 includes a first plane 9 and a second plane 10, the first plane 9 and the second plane 10 are not on the same plane, and by disposing the first plane 9 and the second plane 10 of the second transition section 8 on different planes, it is ensured that air enters the end plate 6, and does not directly pass through the air inlet 7 of the end plate 6, but passes through the closed space enclosed by the first plane 9 and then passes through the closed space enclosed by the second plane 10, so that air can slowly pass through the second transition section 8, and the flow resistance of air is reduced.

In some alternative embodiments, the joint of the first plane 9 and the second plane 10 is a smooth joint, so as to avoid the situation that the joint of the first plane 9 and the second plane 10 is broken.

In this embodiment, the first plane 9 coincides with the mouth wall of the air inlet 7, thereby facilitating the machining and fabrication of the second transition section 8.

In some optional embodiments, the pipe body 1 is further provided with a connecting end 4, the connecting end 4 is arranged near the first transition section 3, that is, the connecting end 4 is arranged at the bottom of the pipe body 1, and the pipe body 1 is connected with the end plate 6 through the connecting end 4; in this embodiment, the connecting end 4 is a flange formed at one end of the first transition section 3 away from the body 2.

Meanwhile, a plurality of mounting holes 5 may be formed in the connecting end 4, and a plurality of mounting holes 5 are also formed in the end plate 6 at positions corresponding to the mounting holes 5, so that the pipe body 1 and the end plate 6 may be connected by a fastener (not shown in the figure); in this embodiment, the fasteners are bolts.

In some optional embodiments, the pipe body 1 is an integrally formed part, and the pipe body 1 is processed as an integrally formed part, that is, the body 2, the first transition section 3 and the connection end 4 included in the pipe body 1 are integrally formed parts, so that the strength and the rigidity of the pipe body 1 are ensured, and the service life of the pipe body 1 is further ensured.

In this embodiment, the number of the tube bodies 1 is two, two of the tube bodies 1 are arranged along the diagonal of the end plate 6, and the arrangement mode of the tube bodies 1 corresponds to the arrangement mode of the air inlet 7 on the end plate 6.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A fuel cell stack manifold structure, comprising:

the pipe body (1) is arranged on the end plate (6), and an inlet of the pipe body (1) corresponds to an air inlet (7) on the end plate (6);

the pipe body (1) comprises a body (2) and a first transition section (3), the first transition section (3) is arranged close to the end plate (6), and the diameter of the first transition section (3) is larger than that of the body (2);

a second transition section (8) provided on the air inlet (7) of the end plate (6).

2. The fuel cell stack manifold structure according to claim 1, wherein the second transition section (8) comprises a first plane (9) and a second plane (10), the first plane (9) and the second plane (10) not being on the same plane.

3. The fuel cell stack manifold structure according to claim 2, wherein the junction of the first plane (9) and the second plane (10) is a smooth junction.

4. A fuel cell stack manifold structure according to claim 2 or 3, characterized in that the first plane (9) coincides with the mouth wall of the air inlet (7).

5. The fuel cell stack manifold structure according to claim 4, wherein a connecting end (4) is further provided on the pipe body (1), the connecting end (4) is provided near the first transition section (3), and the pipe body (1) is connected to the end plate (6) through the connecting end (4).

6. The fuel cell stack manifold structure according to claim 5, wherein the connection end (4) is a flange formed at an end of the first transition section (3) remote from the body (2).

7. The fuel cell stack manifold structure according to claim 5 or 6, wherein the connection end (4) is provided with a plurality of mounting holes (5) for connecting the pipe body (1) and the end plate (6) by a fastener.

8. The fuel cell stack manifold structure according to claim 7, wherein the pipe body (1) is an integrally formed piece.

9. The fuel cell stack manifold structure according to claim 1, wherein the number of the pipe bodies (1) is two, and the two pipe bodies (1) are arranged along a diagonal line of the end plate (6).

10. A fuel cell comprising the fuel cell stack manifold structure of any one of claims 1 to 9.