CN214378512U

CN214378512U - Hydrogen fuel cell bipolar plate

Info

Publication number: CN214378512U
Application number: CN202120530651.7U
Authority: CN
Inventors: 任杰; 郭亚卿; 杨志祎; 鲍连福; 刘晓凯
Original assignee: Jiayu Hydrogen Energy Technology Liaoning Co ltd
Current assignee: Jiayu Hydrogen Energy Technology Liaoning Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-10-08
Anticipated expiration: 2031-03-15

Abstract

The application relates to a bipolar plate of a hydrogen fuel cell, and relates to the technical field of hydrogen fuel cells. A hydrogen fuel cell bipolar plate comprises a first polar plate and a second polar plate which are oppositely arranged, and further comprises a plurality of screws and a plurality of limiting rings, wherein the screws penetrate through the limiting rings and are fixedly connected with the limiting rings; the first polar plate is provided with a plurality of through holes, one side of the first polar plate, which is close to the second polar plate, is provided with a plurality of first countersunk holes, the first countersunk holes are communicated with the through holes, and the first countersunk holes correspond to the through holes one to one; the limiting ring is rotatably connected in the first countersunk hole, the screw penetrates through one through hole and is in threaded connection with the second pole plate, and the screw cap of the screw is positioned on the outer side of the through hole. The first polar plate and the second polar plate of the hydrogen fuel cell bipolar plate are convenient to disassemble and maintain.

Description

Hydrogen fuel cell bipolar plate

Technical Field

The application relates to the technical field of hydrogen fuel cells, in particular to a bipolar plate of a hydrogen fuel cell.

Background

A fuel cell is a power generation device that directly converts chemical energy present in a fuel and an oxidant into electrical energy. Fuel and air are separately fed into the fuel cell to produce electricity. It is externally provided with positive and negative electrodes, electrolytes and the like, and is like a storage battery, but can not be used for 'electricity storage' substantially, and is a 'power plant', and the electrodes, the electrolytes and the redox reaction are needed for generating electricity. Fuel cells are energy conversion machines that convert chemical energy into electrical energy. When the fuel cell is operated, fuel and oxidant are supplied from outside to react, reactants are continuously input, reaction products are continuously generated, and the fuel cell continuously generates electricity.

At present, hydrogen fuel cells are widely applied to equipment such as vehicles and ships, and in the practical use of the hydrogen fuel cells, it is found that electrode plates used by the current hydrogen fuel cells are mostly welded, so that the hydrogen fuel cells are inconvenient to disassemble and maintain.

SUMMERY OF THE UTILITY MODEL

To overcome the defects in the prior art, the bipolar plate for the hydrogen fuel cell has the advantages of being convenient to disassemble and maintain.

The technical purpose of the application is realized by the following technical scheme:

a hydrogen fuel cell bipolar plate comprises a first polar plate and a second polar plate which are oppositely arranged, and further comprises a plurality of screws and a plurality of limiting rings, wherein the screws penetrate through the limiting rings and are fixedly connected with the limiting rings;

the first polar plate is provided with a plurality of through holes, one side of the first polar plate, which is close to the second polar plate, is provided with a plurality of first countersunk holes, the first countersunk holes are communicated with the through holes, and the first countersunk holes correspond to the through holes one to one;

the limiting ring is rotatably connected in the first countersunk hole, the screw penetrates through one through hole and is in threaded connection with the second pole plate, and the screw cap of the screw is positioned on the outer side of the through hole.

By adopting the technical scheme, the screw is limited by the arrangement of the limiting ring, so that the screw is rotationally connected to the first polar plate, and the screw is prevented from falling off the first polar plate; the first polar plate and the second polar plate can be detachably connected through the screw, so that the battery can be maintained conveniently. Therefore, the application has the advantage of convenient dismantlement and maintenance.

Preferably, one side of the first polar plate, which is far away from the second polar plate, is provided with a plurality of second countersunk holes, the second countersunk holes are communicated with the through holes, the second countersunk holes correspond to the through holes one to one, and the screw caps of the screws are positioned in the second countersunk holes.

Through adopting above-mentioned technical scheme, through the setting of second counter sink, conveniently prevent the head of a nail of screw in the second counter sink.

Preferably, the first plate comprises a hydrogen plate inlet region, a hydrogen plate outlet region, and a hydrogen reaction region in communication with the hydrogen plate inlet region and the hydrogen plate outlet region;

the second polar plate includes oxygen polar plate import district, oxygen polar plate export district and oxygen reaction zone, the oxygen reaction zone with oxygen polar plate import district with oxygen polar plate export district intercommunication.

By adopting the technical scheme, fuels such as oxyhydrogen enter from the inlet area of the hydrogen electrode plate or the inlet area of the oxygen electrode plate, then enter the hydrogen reaction area or the oxygen reaction area for reaction, and finally are discharged from the outlet area of the hydrogen electrode plate or the outlet area of the oxygen electrode plate.

Preferably, the hydrogen plate inlet zone comprises a hydrogen inlet, a first air inlet and a first coolant inlet;

the hydrogen plate outlet area comprises a hydrogen outlet, a first air outlet and a first cooling liquid outlet;

the oxygen electrode plate inlet region comprises an oxygen inlet, a second air inlet and a second cooling liquid inlet;

the oxygen electrode plate outlet region includes an oxygen outlet, a second air outlet, and a second coolant outlet.

Preferably, the hydrogen reaction zone and the oxygen reaction zone are both S-shaped flow channels.

Through adopting above-mentioned technical scheme, compare in sharp runner, the length of runner is great, has increased the retention time of hydrogen and oxygen in the runner of S-shaped for the reaction is more abundant.

Preferably, the number of the flow passages is 3 to 5.

Preferably, a sealing groove is formed in one side, away from each other, of each of the first polar plate and the second polar plate, and a sealing ring is arranged in the sealing groove.

Through adopting above-mentioned technical scheme, through the setting of sealing ring for prevent that working fluid from leaking outward.

In summary, the present application has the following beneficial effects: the screw is limited by the limiting ring, so that the screw is rotationally connected to the first polar plate, and the screw is prevented from falling off the first polar plate; the first polar plate and the second polar plate can be detachably connected through the screw, so that the battery can be maintained conveniently. Therefore, the application has the advantage of convenient dismantlement and maintenance.

Drawings

FIG. 1 is a front view of a first plate of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a front view of a second plate in the present application.

In the figure: 1. a first electrode plate; 1A, a hydrogen electrode plate inlet area; 11. a hydrogen inlet; 12. a first air inlet; 13. a first coolant inlet; 1B, an outlet area of the hydrogen electrode plate; 14. a hydrogen outlet; 15. a first air outlet; 16. a first coolant outlet; 2. a second polar plate; 2A, an oxygen electrode plate inlet area; 21. an oxygen inlet; 22. a second air inlet; 23. a second coolant inlet; 2B, an oxygen electrode plate outlet area; 24. an oxygen outlet; 25. a second air outlet; 26. a second coolant outlet; 3. a sealing groove; 4. a through hole; 5. a first counterbore; 6. a flow channel; 7. a diaphragm; 8. a second counterbore; 9. a limiting ring; 10. and (4) screws.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1-3, a bipolar plate for a hydrogen fuel cell disclosed in the present application includes a first plate 1 and a second plate 2 disposed opposite to each other, and a membrane 7 disposed between the first plate 1 and the second plate 2, wherein the first plate 1 and the second plate 2 are separated by the membrane 7, so as to ensure that water channels of the first plate 1 and the second plate 2 are unobstructed, thereby ensuring the quality of the cell and improving the stability of the cell.

Referring to fig. 1 and 2, the first plate 1 is provided with a plurality of through holes 4, four are taken as examples in this embodiment, one side of the first plate 1 close to the second plate 2 is provided with a plurality of first countersunk holes 5, and the first countersunk holes 5 are in one-to-one correspondence with and communicated with the through holes 4.

It should be noted that the diameter of the first counterbore 5 is larger than the diameter of the through hole 4, so that the first counterbore 5 is communicated with the through hole 4.

Illustratively, the first plate 1 has a rectangular shape, and the through holes 4 are located at four corners of the first plate 1.

Referring to fig. 2, the hydrogen fuel cell bipolar plate further includes a plurality of screws 10 and a plurality of stop rings 9, the stop rings 9 are sleeved on the outer peripheral surfaces of the screws 10, the stop rings 9 are fixedly disposed on the screws 10, and the screws 10 are threaded with the second plate 2 through one of the through holes 4.

It should be noted that the second pole plate 2 is provided with a threaded hole, so that the screw 10 is screwed into the threaded hole.

Illustratively, the cross section of the limiting ring 9 is circular, and the shape of the first counter sink 5 is circular, so that the shape of the limiting ring 9 is matched with the shape of the first counter sink 5, so as to rotate the limiting ring 9 in the first counter sink 5.

The first polar plate 1 is connected with the second polar plate 2 through the screw thread connection of the screw 10 and the second polar plate 2, and the first polar plate 1 and the second polar plate 2 are convenient to detach and maintain.

Referring to fig. 1 and 2, a plurality of second counter bores 8 are formed in one side of the first pole plate 1 away from the second pole plate 2, and one second counter bore 8 is communicated with one through hole 4.

It should be noted that the diameter of the second counterbore 8 is larger than the diameter of the through hole 4, so that the second counterbore 8 is communicated with the through hole 4.

In the case where the screw 10 is screwed with the second pole plate 2 through the through hole 4, the nut of the screw 10 is made to be in the second counterbore 8, and functions to protect the screw 10.

Referring to fig. 1 and 3, the first electrode plate 1 includes a hydrogen electrode plate inlet region 1A, a hydrogen electrode plate outlet region 1B, and a hydrogen reaction region communicating with the hydrogen electrode plate inlet region 1A and the hydrogen electrode plate outlet region 1B.

It should be noted that the hydrogen electrode plate inlet area 1A and the hydrogen electrode plate outlet area 1B are respectively located at two opposite ends of the first electrode plate 1, so as to avoid an excessive pressure difference in the bipolar plate of the hydrogen fuel cell, and to improve the service life of the bipolar plate of the hydrogen fuel cell.

Illustratively, the hydrogen plate inlet region 1A includes a hydrogen inlet 11, a first air inlet 12, and a first coolant inlet 13 for injecting hydrogen, air, and coolant, respectively, such that the hydrogen, air, and coolant react within the hydrogen reaction zone.

Illustratively, the hydrogen plate outlet region 1B includes a hydrogen outlet 14, a first air outlet 15, and a first coolant outlet 16 for discharging hydrogen, air, and coolant, respectively.

Referring to fig. 1 and 3, the second plate 2 includes an oxygen plate inlet region 2A, an oxygen plate outlet region 2B, and an oxygen reaction region 6, the oxygen reaction region 6 being in communication with the oxygen plate inlet region 2A and the oxygen plate outlet region 2B.

It should be noted that the oxygen electrode plate inlet area 2A and the oxygen electrode plate outlet area 2B are respectively located at two opposite ends of the second electrode plate 2, so as to avoid an excessive pressure difference in the hydrogen fuel cell bipolar plate, and to improve the service life of the hydrogen fuel cell bipolar plate.

Illustratively, the oxygen plate inlet zone 2A includes an oxygen inlet 21, a second air inlet 22, and a second coolant inlet 23 for injecting oxygen, air, and coolant, respectively, such that the oxygen, air, and coolant enter the oxygen reaction zone and react within the hydrogen reaction zone.

Illustratively, the oxygen plate outlet region 2B includes an oxygen outlet 24, a second air outlet 25, and a second coolant outlet 26 for exhausting oxygen, air, and coolant, respectively.

Referring to fig. 1 and 3, the hydrogen reaction zone and the oxygen reaction zone are both provided with S-shaped flow channels 6, and compared with the straight flow channels 6, the length of the flow channels 6 can be made larger in the limited space of the first plate 1 and the second plate 2, so that the retention time of hydrogen and oxygen in the flow channels 6 is increased, and the reaction is more sufficient.

Illustratively, the number of flow channels 6 is 3-5.

Referring to fig. 1 and 3, a sealing groove 3 is formed in one side of the first electrode plate 1 close to the second electrode plate 2, and a sealing groove 3 is formed in one side of the second electrode plate 2 close to the first electrode plate 1.

It can be understood that the sealing groove 3 of the first polar plate 1 and the sealing groove 3 of the second polar plate 2 are combined to form a groove body for installing a sealing rubber frame for sealing the gap between the first polar plate 1 and the second polar plate 2 for quality inspection, and preventing the leakage of hydrogen, air and cooling liquid.

The specific working principle in this application: the screw 10 is connected with the first polar plate 1 through the screw thread connection of the screw 10 and the limiting ring 9; the first polar plate 1 is connected with the second polar plate 2 through the screw thread connection of the screw 10 and the second polar plate 2, and the first polar plate 1 and the second polar plate 2 are convenient to detach and maintain.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A hydrogen fuel cell bipolar plate comprises a first polar plate (1) and a second polar plate (2) which are oppositely arranged, and is characterized by also comprising a plurality of screws (10) and a plurality of limiting rings (9), wherein the screws (10) penetrate through the limiting rings (9) and are fixedly connected with each other;

the first polar plate (1) is provided with a plurality of through holes (4), one side of the first polar plate (1) close to the second polar plate (2) is provided with a plurality of first countersunk holes (5), the first countersunk holes (5) are communicated with the through holes (4), and the first countersunk holes (5) correspond to the through holes (4) one to one;

the limiting ring (9) is rotatably connected in the first counter sink (5), the screw (10) penetrates through one of the through hole (4) and the second polar plate (2) in threaded connection, and the screw cap of the screw (10) is located on the outer side of the through hole (4).

2. The bipolar plate of the hydrogen fuel cell according to claim 1, wherein a plurality of second countersunk holes (8) are formed in one side of the first polar plate (1) away from the second polar plate (2), the second countersunk holes (8) are communicated with the through holes (4), the second countersunk holes (8) are in one-to-one correspondence with the through holes (4), and caps of the screws (10) are located in the second countersunk holes (8).

3. A hydrogen fuel cell bipolar plate according to claim 2, wherein said first plate (1) comprises a hydrogen plate inlet region (1A), a hydrogen plate outlet region (1B) and a hydrogen reaction region, said hydrogen reaction region communicating with said hydrogen plate inlet region (1A) and said hydrogen plate outlet region (1B);

the second polar plate (2) includes oxygen polar plate import district (2A), oxygen polar plate export district (2B) and oxygen reaction district, the oxygen reaction district with oxygen polar plate import district (2A) with oxygen polar plate export district (2B) intercommunication.

4. A hydrogen fuel cell bipolar plate according to claim 3, wherein said hydrogen plate inlet region (1A) comprises a hydrogen inlet (11), a first air inlet (12) and a first coolant inlet (13);

the hydrogen plate outlet area (1B) comprises a hydrogen outlet (14), a first air outlet (15) and a first cooling liquid outlet (16);

the oxygen plate inlet zone (2A) comprises an oxygen inlet (21), a second air inlet (22) and a second coolant inlet (23);

the oxygen plate outlet zone (2B) comprises an oxygen outlet (24), a second air outlet (25) and a second coolant outlet (26).

5. A bipolar plate for a hydrogen fuel cell as claimed in claim 3 or 4, wherein the hydrogen reaction zone and the oxygen reaction zone are S-shaped flow channels (6).

6. A bipolar plate for a hydrogen fuel cell according to claim 5, wherein the number of the flow channels (6) is 3 to 5.

7. The bipolar plate of the hydrogen fuel cell according to claim 6, wherein the first polar plate (1) and the second polar plate (2) are provided with a sealing groove (3) at the sides far away from each other, and a sealing ring is arranged in the sealing groove (3).