CN217691228U

CN217691228U - Blind plate structure capable of being inlaid with carbon paper and used for hydrogen fuel cell

Info

Publication number: CN217691228U
Application number: CN202221200564.6U
Authority: CN
Inventors: 茅开强; 万书径; 周凤满
Original assignee: Hangzhou Baiyin New Energy Technology Co ltd
Current assignee: Hangzhou Baiyin New Energy Technology Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-10-28
Anticipated expiration: 2032-05-19

Abstract

The utility model mainly discloses a can inlay hydrogen fuel cell blind plate structure of carbon paper, its technical scheme: the fuel cell comprises a blind plate and a collector assembled with the blind plate, wherein the fuel cell collector is aligned, superposed and assembled with the blind plate; and carbon paper is additionally arranged between the collector and the blind plate. This patent adopts and imbeds carbon paper and reduces contact resistance between blind plate and collecting electrode, increases the mode of electrical conductivity ability. For the influence of the carbon paper on the installation of the sealing ring, when the collector and the blind plate are installed in an overlapped mode, under the condition of applying pressure, the carbon paper is embedded into the sinking plane of the blind plate, the blind plate is tightly attached to the collector, so that the compression amount of the sealing ring is only related to the depth of an installation groove of the sealing ring, the sealing precision is improved, and the sealing consistency is improved.

Description

Blind plate structure capable of being inlaid with carbon paper and used for hydrogen fuel cell

Technical Field

The utility model relates to a fuel cell technical field, especially a can inlay hydrogen fuel cell of carbon paper blind plate structure.

Background

The contact mounting means of current proton exchange membrane fuel cell collecting electrode and blind plate, chinese patent application No. CN210866366U, discloses a composite construction and insulating board of collector plate and insulating board to and patent application No.: CN202020146312.4 discloses an insulating collector plate and a fuel cell, both of which adopt a method of embedding a collector plate into an insulating plate, in which an assembly gap between the insulating plate and a blind plate is affected by thickness tolerance of the collector plate and depth tolerance of a sinking plane of the insulating plate, so that a difference of compression amounts of a seal ring between the collector plate and the insulating plate is large, and consistency of sealing performance is affected.

In addition, the contact resistance between the collector plate and the blind plate is a rigid body, and the micro state exists in a point contact mode during contact, so that the contact resistance between the blind plate and the collector plate is larger than a theoretical design value, and the power generation performance of the pile is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can inlay hydrogen fuel cell blind plate structure of carbon paper, increase electric conductive property, improve sealed precision, improve sealed uniformity to the not enough that prior art exists.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a blind plate structure for a hydrogen fuel cell capable of being embedded with carbon paper comprises a blind plate and a collector assembled with the blind plate, wherein the collector of the fuel cell is aligned, superposed and assembled with the blind plate; and carbon paper is additionally arranged between the collector and the blind plate.

Preferably: and a sinking plane is arranged on the plane of the blind plate, which is in contact with the collector, and the size of the sinking plane is larger than or equal to that of the carbon paper.

Preferably: the sinking depth of the sinking plane is smaller than the thickness of the carbon paper in a free state. Under the effect of pile clamping force, in the sunken plane on the carbon paper can be absorbed in the blind plate completely, make blind plate and collecting electrode laminating, the thickness of carbon paper can not influence pile mounting dimension this moment, in addition, because of compressibility, the plane flexibility of carbon paper, make the blind plate and collecting electrode and the full plane optional position contact of carbon paper inseparabler to the contact resistance between blind plate and the collecting electrode has been reduced.

Preferably, the following components: the sinking depth of the sinking plane is 8-20% smaller than the thickness of the carbon paper in a free state.

Preferably, the following components: the collector and the blind plate have the same or similar external dimensions, and consistency is kept.

Preferably: a sealing ring is arranged on the outer side of the air vent on the contact surface of the blind plate and the collector, a sealing groove is formed in the blind plate, and the sealing ring is placed in the sealing groove. When the blind plate and the collector are jointed, the sealing ring is clamped to deform the sealing ring, and the sealing performance of the blind plate and the collector is determined by the dimensional accuracy of the sealing groove.

The utility model discloses have beneficial effect and do:

this patent adopts and imbeds carbon paper and reduces contact resistance between blind plate and collecting electrode, increases the mode of electrical conductivity ability.

For the influence of the carbon paper on the installation of the sealing ring, when the collector and the blind plate are installed in an overlapped mode, under the condition of applying pressure, the carbon paper is embedded into the sinking plane of the blind plate, the blind plate is tightly attached to the collector, so that the compression amount of the sealing ring is only related to the depth of an installation groove of the sealing ring, the sealing precision is improved, and the sealing consistency is improved.

Drawings

Fig. 1 is an exploded schematic view of a middle blind plate, an insulating plate and a collector of the present invention;

fig. 2 is a local internal connection diagram of the present invention.

Reference numerals: 1. a seal ring; 2. a blind plate; 3. carbon paper; 4. an insulating plate; 5. a collector electrode; 6. and (4) sinking the plane.

Detailed Description

The preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, a blind plate structure for a hydrogen fuel cell capable of being inlaid with carbon paper comprises a blind plate 2, wherein the lower part of a collector 5 is aligned with the blind plate 2 and is superposed and assembled; collector 5 upper portion be insulation board 4, collector 5 with blind 2 between, install carbon paper 3 additional, carbon paper 3 adopts porous structure, the contact is inseparabler, has reduced holistic contact resistance, increases the mode of electrical conductivity.

The blind plate 2 is provided with a sinking plane 6 on a plane contacting with the collector 5, and the size of the sinking plane 6 is larger than or equal to that of the carbon paper 3. The sinking depth of the sinking plane 6 is 8-20% smaller than the thickness of the carbon paper 3 in a free state. The thickness of the carbon paper in a free state depends on actual requirements, and the depth of a sinking plane is different according to different thicknesses, for example, the common carbon paper is 0.2mm. Under the effect of pile clamping force, in carbon paper 3 can sink into the plane 6 that sinks on blind plate 2 completely, make

blind plate

2 and 5 laminating of collecting electrode, the thickness of carbon paper 3 can not influence pile mounting dimension this moment, in addition, because of the compressibility of carbon paper 3, plane flexibility, make blind plate 2 and collecting

electrode

5 and 3 full plane optional position contact of carbon paper inseparabler to reduce the contact resistance between blind plate 2 and collecting electrode 5, do not influence pile dress heap height.

The collector 5 and the blind plate 2 have the same external dimension and can also have similar external dimension, and the consistency is kept.

A sealing ring 1 is arranged on the outer side of an air vent on the contact surface of the blind plate 2 and the collector 5, a sealing groove is formed in the blind plate 2, and the sealing ring 1 is placed in the sealing groove. When the blind plate 2 and the collector 5 are jointed, the sealing ring 1 is clamped to deform the sealing ring 1, and the sealing performance of the blind plate and the collector is determined by the dimensional accuracy of the sealing groove.

For the influence of the carbon paper 3 on the installation of the sealing ring 1, when the collector 5 and the blind plate 2 are installed in an overlapped mode, under the condition of applying pressure, the carbon paper 3 is embedded into the sinking plane 6 of the blind plate 2, so that the blind plate 2 is tightly attached to the collector 5, the compression amount of the sealing ring 1 is only related to the depth of an installation groove of the sealing ring 1, the sealing precision is improved, and the sealing consistency is improved.

The above embodiments are only used for explaining the inventive concept of the present invention, and not for limiting the protection of the claims of the present invention, and all the insubstantial modifications of the present invention made by using the above inventive concept shall fall within the protection scope of the present invention.

Claims

1. A blind plate structure for a hydrogen fuel cell capable of being inlaid with carbon paper,

comprises a blind plate (2) and a collector (5) assembled with the blind plate (2);

the method is characterized in that:

the fuel cell collector electrode (5) is aligned, superposed and assembled with the blind plate (2);

and carbon paper (3) is additionally arranged between the collector (5) and the blind plate (2).

2. The blind structure for a hydrogen fuel cell capable of being inlaid with carbon paper according to claim 1, wherein: the blind plate (2) is provided with a sinking plane on a plane in contact with the collector (5), and the size of the sinking plane is larger than or equal to that of the carbon paper (3).

3. The blind structure for a hydrogen fuel cell capable of being inlaid with carbon paper according to claim 2, wherein: the sinking depth of the sinking plane is smaller than the thickness of the carbon paper (3) in a free state.

4. The blind structure for a hydrogen fuel cell capable of being inlaid with carbon paper according to claim 3, wherein: the sinking depth of the sinking plane is 8 to 20 percent smaller than the thickness of the carbon paper (3) in a free state.

5. The blind structure for a hydrogen fuel cell capable of being inlaid with carbon paper according to claim 1, wherein: the collector (5) and the blind plate (2) have the same external dimension.

6. The blind structure for a carbon paper embeddable hydrogen fuel cell as defined in claim 5, wherein: a sealing ring (1) is arranged on the outer side of an air vent on the contact surface of the blind plate (2) and the collector (5), a sealing groove is formed in the blind plate (2), and the sealing ring (1) is placed in the sealing groove.