CN210272548U

CN210272548U - Plate structure, double-plate device and fuel cell with double-plate device

Info

Publication number: CN210272548U
Application number: CN201920903692.9U
Authority: CN
Inventors: 王阳; 张永; 张磊
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-04-07
Anticipated expiration: 2029-06-17

Abstract

A plate structure, a double plate device and a fuel cell with the double plate device, the double plate device can be formed by metal plates and used as a bipolar plate of the fuel cell, the bipolar plate is formed by two plate structures, wherein each plate comprises a front surface and a back surface, a plurality of polygonal grooves are formed on the front surface, the polygonal grooves are arranged together to form a honeycomb-like structure, two adjacent polygonal grooves share one edge, grooves communicated with the two adjacent polygonal grooves are formed on the edge, and a flow passage communicated with each other is formed on the front surface. And on the reverse side of the plate, a bottom surface of the polygonal groove and a bottom surface of the groove are included, wherein the height of the bottom surface of the polygonal groove is greater than that of the bottom surface of the groove, thereby forming a flow channel around the polygonal bottom surface. Through the arrangement, the flow channels form a cross network with four directions and eight directions, and no matter which inlet or inlets the reaction gas enters, the reaction gas can flow to other channels, so that the condition of unbalanced reaction caused by different flow rates and different flow rates of the gas in each flow channel of the straight flow channel is avoided.

Description

Plate structure, double-plate device and fuel cell with double-plate device

Technical Field

The utility model relates to a plate structure, biplate device and have fuel cell of biplate device particularly, relate to a plate structure, bipolar plate and have fuel cell of bipolar plate.

Background

The bipolar plate materials widely adopted by the fuel cell at present are an injection molding graphite bipolar plate and a flexible graphite bipolar plate, and the graphite plate has the defects of larger thickness and weight, so that the whole volume and the weight of a fuel cell stack are very large; and the mechanical strength of the graphite plate is not high, and the graphite plate is easy to crack when being subjected to violent impact, so that the whole fuel cell stack cell is easy to fail.

From the current situation of domestic fuel cell market, the fuel cell will be more and more made of metal plate as bipolar plate, because the metal plate is light in weight and small in volume, and the metal plate can be recycled, compared with graphite cell, the metal plate fuel cell will have a greater development prospect.

The flow channel of the existing bipolar plate has single design, and the gas to be reacted can not be fully mixed and reacted. There is a need for a plate structure that is different from the prior art in that it can form specific flow channels to mix the gas in the flow channels sufficiently.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a plate structure, which has a specific formation, and the front and back surfaces of the plate structure can form a cross flow path. Furthermore, the plate structure can be used for forming a double-plate device, the plate structure is made of metal, so that the double-plate device can be used as a bipolar plate, and a flow channel different from the prior art, a straight flow channel or a snake flow channel can be formed through the special structural design of the plate structure. The flow channels are similar to the net flow channels and are mutually staggered. The phenomenon of uneven diffusion of reaction gas is avoided, so that the reaction is uniform; prevent the water produced by the reaction from blocking the flow passage and causing flooding.

Specifically, the method comprises the following steps: a plate structure comprises a front surface and a back surface, wherein a plurality of polygonal grooves which are adjacently arranged are formed on the front surface of the plate, the number of sides of each polygonal groove is n, n is a natural number which is more than or equal to 3, and the polygonal grooves are surrounded by the n sides;

each edge of the polygonal groove at the non-edge part shares one edge with the other polygonal groove, and each edge is provided with a groove communicated with the adjacent polygonal groove;

the polygonal grooves at the edge parts comprise non-shared edges and edges shared by the polygonal grooves at the non-edge parts, and the shared edges are provided with grooves communicated with other polygonal grooves;

at least part of the unshared edges have an inlet and an outlet communicating with the outside.

Preferably, the top faces of the sides of each polygonal slot lie substantially in the same plane on the front face of the plate structure.

Preferably, the depth of each polygonal groove is greater than the depth of the recess in the front face of the plate structure.

Preferably, the reverse side of the plate structure comprises bottom surfaces of the polygonal grooves and bottom surfaces of the grooves, wherein the bottom surfaces of the respective polygonal grooves are at substantially the same height H and the bottom surfaces of the plurality of grooves are at a height lower than said height hhole at the reverse side of the plate.

Preferably, the bottom surfaces of the respective grooves of the plurality of grooves are at the same height h.

Preferably, the polygonal groove is a regular polygon.

Preferably, the polygonal groove is a regular hexagon, and a plurality of adjacently arranged polygonal grooves are formed in a honeycomb structure.

Preferably, the plate is a metal plate.

In addition, the utility model also provides a double-plate device, which comprises two plate structures, wherein the two plate structures are formed in a mutual pressing and stacking mode, when in pressing and stacking, the two plate structures are overlapped, and polygonal grooves of the two plate structures are arranged face to face, so that first flow passages which are mutually communicated are formed inside the double-plate device;

the reverse side of the plate structure comprises the bottom surfaces of the polygonal grooves and the bottom surfaces of the grooves, wherein the bottom surfaces of the polygonal grooves are approximately at the same height H, and the bottom surfaces of the grooves are at a height H higher than the height H, so that a second flow passage and a third flow passage are formed on the front side and the rear side of the double-plate device.

In addition, the utility model also provides a fuel cell, which comprises a plurality of double-plate devices as described in the utility model, a plurality of double-plate devices are overlapped and pressed together, a membrane electrode is arranged between a plurality of double-plate devices, and a first flow channel is provided with a cooling liquid inlet and a cooling liquid outlet; the second flow channel is provided with a hydrogen inlet and a hydrogen outlet; the third flow channel is provided with an oxygen inlet and an oxygen outlet.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.

FIG. 1 prior art graphite bipolar plate fuel cell

Fig. 2 is a schematic view of a dual plate device of the present invention.

Fig. 3 is a partial front enlarged view of the plate structure of the present invention.

Fig. 4 is a partial reverse enlarged view of the plate structure of the present invention.

In the figure: 100-end plate, 200-diffusion layer, 300-cooling plate, 400-bipolar plate, 500-membrane electrode, 600-sealing strip

1-double plate device, 2-cooling liquid inlet, 3-cooling liquid outlet, 4-hydrogen inlet, 5-hydrogen outlet, 6-oxygen inlet, 7-oxygen outlet, 11-polygonal groove, 12-edge and 13-groove

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.

The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.

The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first component discussed below may be termed a second component without departing from the teachings of the disclosed concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings 2-4:

a board structure comprising a front surface and a back surface, wherein a plurality of polygonal grooves 11 are formed on the front surface of the board, the number of sides of the polygonal grooves 11 is n, n is a natural number of 3 or more, and the polygonal grooves 11 are surrounded by n sides:

each edge 12 of the polygonal groove 11 at the non-edge part shares one edge 12 with another polygonal groove 11, and each edge 12 is provided with a groove 13 communicated with the adjacent polygonal groove 11;

the polygonal groove 11 at the edge part comprises a non-shared edge 12 and an edge 12 shared by the polygonal groove 11 at the non-edge part, and the shared edge 12 is provided with a groove 13 communicated with other polygonal grooves 11;

the portion of the non-common side 12 includes an inlet and an outlet communicating with the outside.

Preferably, the top surfaces of the sides of each polygonal slot 11 lie substantially in the same plane on the front face of the plate structure.

Preferably, the depth of each polygonal groove 11 is greater than the depth of the recess 13 in the front face of the plate structure.

Preferably, the reverse side of the plate structure comprises the bottom surfaces of the polygonal grooves 11 and the bottom surfaces of the recesses 13, wherein, on the reverse side of the plate, the bottom surfaces of the respective polygonal grooves 11 are at substantially the same height H, and the bottom surfaces of the plurality of recesses 13 are at a height H lower than said height H.

Preferably, the bottom surface of each of the plurality of grooves 13 is at the same height h.

Preferably, the polygonal groove 11 is a regular polygon.

Preferably, the polygonal groove 11 is a regular hexagon, and a plurality of adjacently arranged polygonal grooves 11 are formed in a honeycomb structure.

Preferably, the plate is a metal plate.

A double-plate device 1 comprises the plate structure of any one of the utility model, and the two plate structures are formed in a mutual pressing and stacking mode, when in pressing and stacking, the two plate structures are overlapped and arranged, and the polygonal grooves 11 of the plate structures are oppositely arranged, so that the inner part of the double-plate device 1 is provided with first flow passages which are mutually communicated;

the reverse side of the plate structure includes the bottom surfaces of the polygonal grooves 11 and the bottom surfaces of the grooves 13, wherein the bottom surfaces of the polygonal grooves 11 are at substantially the same height H and the bottom surfaces of the grooves 13 are at a height H lower than the height H, so that the second and third flow passages are formed at the front and rear sides of the two-plate device 1.

A fuel cell comprises a plurality of double-plate devices 1 according to the invention, wherein the double-plate devices 1 are overlapped and pressed together, membrane electrodes 500 are arranged between the double-plate devices 1, and a first flow channel is provided with a cooling liquid inlet and a cooling liquid outlet; the second flow channel is provided with a hydrogen inlet and a hydrogen outlet; the third flow channel is provided with an oxygen inlet and an oxygen outlet.

The principles and processes of the present invention are described as follows:

as shown in fig. 2, the dual-plate device 1 of the present invention, which may preferably be a metal bipolar plate of a fuel cell, is constructed using two identical plates. As shown in fig. 2 and 3, which show front and back views of a single plate, the flow channels are staggered and have a net-like structure as seen from the front. And the two surfaces are also staggered from the reverse side to present a net structure. When the two-plate device 1 is a metal plate, it can be used as a bipolar plate, pressing a plurality of bipolar plates together, and a membrane electrode is disposed between the bipolar plates.

As shown in fig. 2, when hydrogen flows in from the left hydrogen inlet 4, the hydrogen diffuses in all directions at a very high speed (as shown in fig. 3), and the hydrogen is pushed forward as a whole, and is catalyzed by the electrolyte of the membrane electrode 500, electrons are lost, and hydrogen ions, i.e. protons, pass through a proton exchange membrane (not shown) to chemically react with oxygen entering from the right oxygen inlet 6, so that water is generated in an oxygen flow channel, most of the generated water is in the form of water vapor, and is discharged from the flow channel along with oxygen flowing at a high speed, and a small part of the generated water has a wetting effect on the proton exchange membrane, so that the efficiency of the catalytic reaction is increased, and another part of the generated water is collected into small water droplets and is slowly discharged under the action of gravity. Because the runners of the runner are communicated with each other, the phenomenon of flooding the runners cannot occur. Continuous reaction is ensured, meanwhile, electrons lost by the hydrogen gas are transmitted through a collector plate (not shown) to continuously supply power to an external load, the rest hydrogen gas flows out from a hydrogen gas outlet 5, and the rest oxygen gas flows out from an oxygen gas outlet 7.

The utility model discloses following beneficial effect has:

referring to fig. 3 and 4, it can be seen from the drawings that no matter the flow channels are the front flow channels or the back flow channels, a cross network of four-way and eight-way is formed, and no matter which inlet or inlets the reaction gas enters, the reaction gas has an opportunity to flow to other channels, so that the reaction imbalance caused by different gas flow rates and different flow rates of the flow channels of the straight flow channels is avoided. Adopt the utility model discloses a double plate device, it is as bipolar plate, and gas diffusion is even for the battery overall voltage is stable, has improved the battery performance.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A board structure, the board structure comprising a front surface and a back surface, wherein a plurality of polygonal grooves (11) are formed on the front surface of the board, the polygonal grooves (11) have n sides, n is a natural number greater than or equal to 3, and the polygonal grooves (11) are surrounded by the n sides;

each edge (12) of the polygonal groove (11) at the non-edge part shares one edge (12) with the other polygonal groove (11), and a groove (13) communicated with the adjacent polygonal groove (11) is formed in each edge (12);

the polygonal grooves (11) at the edge parts comprise non-shared edges (12) and edges (12) shared by the polygonal grooves (11) at the non-edge parts, and the shared edges (12) are provided with grooves (13) communicated with the adjacent polygonal grooves (11);

at least part of the unshared edges (12) have an inlet and an outlet communicating with the outside.

2. The panel structure according to claim 1, characterized in that: the top surfaces of the sides (12) of each polygonal groove (11) are located substantially in the same plane on the front face of the plate structure.

3. A panel structure according to claim 1 or 2, characterized in that: the depth of each polygonal groove (11) is greater than the depth of the recess (13) in the front face of the panel structure.

4. A panel structure according to claim 1 or 2, characterized in that: the reverse side of the plate structure comprises the bottom surfaces of the polygonal grooves (11) and the bottom surfaces of the grooves (13), wherein the bottom surfaces of the polygonal grooves (11) are approximately at the same height H, and the bottom surfaces of the grooves (13) are at a height lower than the height H.

5. The panel structure according to claim 4, characterized in that: on the reverse side of the plate structure, the bottom surfaces of the grooves (13) are at the same height h.

6. The panel structure according to claim 1, 2 or 5, characterized in that: the polygonal groove (11) is a regular polygon.

7. The panel structure according to claim 6, characterized in that: the polygonal groove (11) is a regular hexagon, and a plurality of polygonal grooves (11) arranged adjacently are formed in a honeycomb structure.

8. The panel structure of any one of claims 1, 2, 5, and 7, wherein: the plate is a metal plate.

9. A double plate device (1), characterized in that: comprising two plate structures according to any of claims 1-8, formed by mutually overlapping two of said plate structures, wherein the two plate structures are arranged in a superposed manner and the polygonal grooves (11) of the two plate structures are arranged face to face, such that the interior of the double plate device (1) is formed with first flow channels communicating with each other;

the reverse side of the plate structure comprises the bottom surfaces of the polygonal grooves (11) and the bottom surfaces of the grooves (13), wherein the bottom surfaces of the polygonal grooves (11) are approximately at the same height H, and the bottom surfaces of the grooves (13) are at a height lower than the height H, so that a second flow passage and a third flow passage are formed on the front side and the rear side of the double-plate device (1).

10. A fuel cell, characterized by: comprising a plurality of the double-plate devices (1) as claimed in claim 9, wherein the double-plate devices (1) are overlapped and pressed together, membrane electrodes (500) are arranged between the double-plate devices (1), and the first flow channel is provided with a cooling liquid inlet (2) and a cooling liquid outlet (3); the second flow channel is provided with a hydrogen inlet (4) and a hydrogen outlet (5); the third flow channel is provided with an oxygen inlet (6) and an oxygen outlet (7).