CN110828846A - Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof - Google Patents
Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof Download PDFInfo
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- CN110828846A CN110828846A CN201911225562.5A CN201911225562A CN110828846A CN 110828846 A CN110828846 A CN 110828846A CN 201911225562 A CN201911225562 A CN 201911225562A CN 110828846 A CN110828846 A CN 110828846A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0206—Metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses an air-cooled proton exchange membrane fuel cell metal bipolar plate and a fuel cell thereof, wherein the air-cooled proton exchange membrane fuel cell metal bipolar plate comprises two superposed metal single plates, each metal single plate is provided with an installation side and a flow field side, and the installation sides of the two metal single plates are jointed to form an air inlet channel and an air outlet channel which are spaced; one of the two metal single plates is a cathode plate, the other metal single plate is an anode plate, a plurality of oxygen flow channels are arranged on the flow field side of the cathode plate, a plurality of hydrogen flow channels are arranged on the flow field side of the anode plate, and the hydrogen flow channels are communicated and arranged between the air inlet channel and the air outlet channel. According to the invention, the anode plate and the cathode plate are more convenient to form due to easy stamping of metal, and the defect that a graphite plate is difficult to process is effectively overcome; the hydrogen flow channel and the oxygen flow channel are arranged on different sides, so that hydrogen and oxygen can independently circulate, and mutual gas communication is avoided; the gas inlet channel and the gas outlet channel are respectively positioned on different sides of the hydrogen flow channel, which is beneficial to the circulation of gas at uniform speed.
Description
Technical Field
The invention relates to the technical field of proton exchange membrane fuel cells, in particular to an air-cooled proton exchange membrane fuel cell metal bipolar plate and a fuel cell thereof.
Background
The fuel cell is a chemical device for directly converting chemical energy of fuel into electric energy, and is a novel power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The main structural components of the fuel cell comprise a bipolar plate, and the bipolar plate has the functions of providing a gas flow channel, preventing the hydrogen and the oxygen in a cell gas chamber from communicating with each other, and establishing a current path between a cathode plate and an anode plate.
Most of the bipolar plates of the conventional fuel cells are made of graphite, but the graphite plates are difficult to process and high in cost, so that the bipolar plates are not suitable for mass production.
Disclosure of Invention
The invention mainly aims to provide an air-cooled proton exchange membrane fuel cell metal bipolar plate and a fuel cell thereof, and aims to solve the problem of difficult processing of the traditional graphite bipolar plate.
In order to achieve the purpose, the air-cooled proton exchange membrane fuel cell metal bipolar plate provided by the invention comprises two metal single plates which are arranged in a stacking manner, wherein each metal single plate is provided with an installation side and a flow field side which are opposite, and the installation sides of the two metal single plates are mutually jointed to form an air inlet channel and an air outlet channel which are arranged at intervals;
one of the two metal single plates is a cathode plate, the other metal single plate is an anode plate, a plurality of oxygen flow channels are arranged on the flow field side of the cathode plate, a plurality of hydrogen flow channels are arranged on the flow field side of the anode plate, and the hydrogen flow channels are communicated and arranged between the air inlet channel and the air outlet channel.
Optionally, the air inlet channel and/or the air outlet channel are provided with a plurality of connecting columns at intervals along the width direction thereof, and two ends of each connecting column are respectively connected with the installation sides of the two metal veneers.
Optionally, the outer circumferential side wall of the connecting column is arc-surface-shaped.
Optionally, the anode plate is provided with a step portion protruding towards the flow field side direction of the anode plate, and the step portion is provided with a gas distribution cavity communicating the gas inlet channel and the hydrogen flow channel.
Optionally, the stepped part has a stepped surface disposed toward the hydrogen flow channel, and the stepped surface is provided with a plurality of air distribution holes communicated with the air distribution cavity at intervals;
wherein, the plurality of air distribution holes are arranged corresponding to the plurality of hydrogen flow channels one by one.
Optionally, the step surface is arranged to be inclined with respect to the plate surface of the anode plate at the position.
Optionally, a plurality of first convex strips are arranged at intervals along the length direction of the flow field side of the anode plate, and a hydrogen flow channel is defined between every two adjacent first convex strips;
a plurality of second raised lines are arranged on the flow field side of the cathode plate at intervals along the width direction of the cathode plate, and an oxygen flow channel is defined between every two adjacent second raised lines.
Optionally, the flow field sides of the two metal veneers are concavely provided with first seal grooves along the circumferential directions thereof, and the first seal grooves are used for being in sealing fit with first seal elements; and/or the presence of a gas in the gas,
and the mounting sides of the two metal veneers are concavely provided with second sealing grooves along the circumferential direction of the air inlet channel and/or the air outlet channel, and the second sealing grooves are used for being in sealing fit with second sealing elements.
Optionally, the two metal veneers are provided with positioning holes at corresponding positions.
In addition, the invention also provides an air-cooled proton exchange membrane fuel cell, which comprises:
the air-cooled proton exchange membrane fuel cell metal bipolar plates are sequentially arranged in a stacked manner, and a membrane electrode is arranged between every two adjacent air-cooled proton exchange membrane fuel cell metal bipolar plates; and the number of the first and second groups,
and the blowing device comprises a fan, and the fan is arranged corresponding to the oxygen flow channels and used for blowing air to each oxygen flow channel.
According to the technical scheme provided by the invention, the characteristic of easy stamping of metal enables the anode plate and the cathode plate to be more conveniently formed, and the defect that a graphite plate is difficult to process is overcome; the hydrogen flow channel and the oxygen flow channel are arranged on different sides, so that hydrogen and oxygen can independently circulate, and mutual gas communication is avoided; the gas inlet channel and the gas outlet channel are respectively positioned on different sides of the hydrogen flow channel, which is beneficial to the circulation of gas at uniform speed, so that the electrochemical reaction can be fully carried out, and the quality of the fuel cell is optimized.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of an embodiment of a metal bipolar plate of an air-cooled PEM fuel cell according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of the flow field side of the anode plate of FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 3;
FIG. 5 is a schematic view of the mounting side of the anode plate of FIG. 1;
FIG. 6 is a schematic view of the construction of the mounting side of the cathode plate of FIG. 1;
FIG. 7 is an enlarged view of the structure of FIG. 6 at C;
fig. 8 is a schematic view of the flow field side of the cathode plate of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Air-cooled proton exchange membrane fuel cell metal |
12 | |
| 1 | |
121 | Oxygen flow channel |
| 1a | |
13 | |
| 1b | Side of |
14 | |
| 11 | Anode plate | 15 | |
| 111 | |
16 | |
| 112 | |
2 | Connecting |
| 113 | Air distribution cavity | 3 | |
| 114 | Air distribution hole | 4 | |
| 115 | |
5 | Locating hole |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The fuel cell is a chemical device for directly converting chemical energy of fuel into electric energy, and is a novel power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The main structural components of the fuel cell comprise a bipolar plate, and the bipolar plate has the functions of providing a gas flow channel, preventing the hydrogen and the oxygen in a cell gas chamber from communicating with each other, and establishing a current path between a cathode plate and an anode plate.
Most of the bipolar plates of the conventional fuel cells are made of graphite, but the graphite plates are difficult to process and high in cost, so that the bipolar plates are not suitable for mass production.
In view of the above, fig. 1 to 8 show embodiments of a metal bipolar plate for an air-cooled pem fuel cell according to the present invention.
Referring to fig. 1, fig. 3 and fig. 5, the air-cooled proton exchange membrane fuel cell metal bipolar plate 100 provided by the present invention includes two metal single plates 1 stacked one on another, where the metal single plates 1 have opposite installation sides 1a and flow field sides 1b, and the installation sides 1a of the two metal single plates 1 are joined to each other to form an air inlet channel 13 and an air outlet channel 14 arranged at an interval; one of the two metal single plates 1 is a cathode plate 12, the other is an anode plate 11, a flow field side 1b of the cathode plate 12 is provided with a plurality of oxygen flow channels 121, a flow field side 1b of the anode plate 11 is provided with a plurality of hydrogen flow channels 111, and the hydrogen flow channels 111 are communicated between the gas inlet channel 13 and the gas outlet channel 14.
In the technical scheme provided by the invention, the characteristic of easy stamping of metal enables the anode plate 11 and the cathode plate 12 to be more conveniently molded, and the defect that a graphite plate is difficult to process is overcome; arranging a soda search fox hydrogen flow channel 111 and a soda search fox oxygen flow channel 121 on different sides, so that hydrogen and oxygen can independently circulate, and mutual air leakage is avoided; the gas inlet channel 13 and the gas outlet channel 14 are respectively arranged at different sides of the hydrogen flow channel 111, which is helpful for the circulation of gas at a uniform speed, so that the electrochemical reaction can be fully performed, and the quality of the fuel cell is optimized.
The design does not limit the specific shape, size, and material of the metal veneer 1, and can be adjusted according to actual needs, but for easy understanding, the embodiment takes the metal veneer 1 in a longitudinal shape as an example for description, at this time, the metal veneer 1 has two long sides with a larger size and two short sides with a smaller size, the extending direction of the long sides is the length direction, and the extending direction of the short sides is the width direction; the installation side 1a and the flow field side 1b of the metal single plate 1 refer to two opposite sides in the thickness direction of the metal single plate 1; the mounting sides 1a of the two metal veneers 1 are joined to each other, and are not limited to joining all plate surfaces of the two mounting sides 1a, and the two mounting sides 1a may be joined in a partial area on the premise of realizing the stable connection of the two metal veneers 1.
Referring to fig. 1 to 2, the hydrogen flow channel 111 is preferably disposed in the middle of the flow field side 1b of the anode plate 11; based on this, the inlet channel 13 and the outlet channel 14 may be formed on both sides of the hydrogen flow channel 111 in the length direction or both sides in the width direction, but preferably, the inlet channel 13 is disposed above the outlet channel 14. Since the inlet channel 13 and the outlet channel 14 both have an inlet end and an outlet end, wherein the inlet end of the inlet channel 13 is used for connecting a hydrogen generating device, the outlet end of the inlet channel 13 is communicated with the upper end of the hydrogen flow channel 111, the inlet end of the outlet channel 14 is communicated with the lower end of the hydrogen flow channel 111, and the outlet end of the outlet channel 14 is communicated to other places, thereby facilitating the formation of a complete flow path for hydrogen to automatically flow out of the outlet channel 14 after entering from the inlet channel 13 and flowing through the hydrogen flow channel 111 under the action of gravity.
Of course, the specific shape and size of the inlet channel 13 and the outlet channel 14 are not limited by the present design, but preferably, the width of the inlet channel 13 and the outlet channel 14 is adapted to the width of the hydrogen flow channel 111 to avoid the hydrogen gas from flowing around. The inlet channels 13 and the outlet channels 14 may be configured differently or identically, and in this embodiment, the relevant structures of the inlet channels 13 and the outlet channels 14 are configured identically, so that the following descriptions of the inlet channels 13 or the outlet channels 14 can be applied to both the inlet channels 13 and the outlet channels 14. In addition, in the present design, the forming manner of the air inlet channel 13 and the air outlet channel 14 is also not limited, and the air inlet channel 13 and the air outlet channel 14 may be formed by stamping the metal single plate 1, may be formed by providing a groove on the installation side 1a of the metal single plate 1, or may be formed by other suitable manners, which are not described in detail herein.
Further, referring to fig. 2, fig. 6 and fig. 7, in the present embodiment, the air inlet channel 13 and/or the air outlet channel 14 are provided with a plurality of connecting columns 2 at intervals along the width direction thereof, and two ends of each connecting column 2 are respectively connected to the mounting sides 1a of the two metal veneers 1. Taking the connecting column 2 at the air inlet channel 13 as an example, the arrangement of the connecting column 2 is equivalent to forming a reinforcing rib between the installation sides 1a of the two metal veneers 1, so as to increase the connection strength between the two metal veneers 1; moreover, the connecting column 2 is arranged at an interval of the distance between the two metal veneers 1, so that the situation that the installation sides 1a of the two metal veneers 1 are deformed and combined after long-term use, the air inlet channel 13 is blocked, and the circulation of hydrogen is influenced is avoided; in addition, the connecting columns 2 are preferably arranged closer to the gas inlet end of the gas inlet channel 13 relative to the gas outlet end of the gas inlet channel 13, and at this time, the connecting columns 2 are arranged at intervals in the width direction, so that a gas passing gap is formed between two adjacent connecting columns 2, and hydrogen enters from the gas inlet end and is uniformly dispersed by the gas passing gaps, so that the uniform distribution of hydrogen is realized.
Further, in this embodiment, the outer peripheral side wall of the connecting column 2 is arc-shaped. Based on this, spliced pole 2 can set up to cylinder or hemispheroid, and the setting of arcsurface form avoids forming sharp angle or sudden change corner for hydrogen is in the circulation of gas clearance department is at the uniform velocity more and stable. In addition, the connecting column 2 can be integrally formed with one of the two metal veneers 1 and then abutted to the other metal veneer 1 during installation, at this time, the material of the connecting column 2 is consistent with that of the metal veneer 1, and the connecting column 2 can be directly formed by stamping the metal veneer 1; or, the connecting column 2 may be arranged independently of the two metal veneers 1, and is installed between the installation sides 1a of the two metal veneers 1 in a bonding fixing or screwing fixing manner, and the like, at this time, the material of the connecting column 2 may be different from the material of the metal veneers 1, for example, the connecting column is arranged to be made of an elastic material, so that the shock-resistant buffer performance between the installation sides 1a of the two metal veneers 1 is improved.
In addition, referring to fig. 3 to fig. 5, in the present embodiment, a step portion 112 is convexly provided on the anode plate 11 toward the flow field side 1b of the anode plate, and the step portion 112 is formed with an air distribution chamber 113 communicating the air intake channel 13 and the hydrogen flow channel 111. The gas distribution chamber 113 is preferably disposed in the region between the connection column 2 and the hydrogen flow channel 111 such that the hydrogen gas distributed through the connection column 2 flows into the gas distribution chamber 113 first and then flows to the hydrogen flow channel 111. The gas distribution chamber 113 can contain a large amount of hydrogen gas to pre-store the hydrogen gas, and the gas distribution chamber 113 helps to smooth the kinetic energy of the hydrogen gas, so that the hydrogen gas flows into the hydrogen gas flow channel 111 at a more uniform and stable state.
Further, in this embodiment, the step portion 112 has a step surface 115 disposed toward the hydrogen flow channel 111, and the step surface 115 is provided with a plurality of air distribution holes 114 communicating with the air distribution cavity 113 at intervals; wherein, the plurality of air distribution holes 114 are arranged corresponding to the plurality of hydrogen flow channels 111 one by one. With such arrangement, the hydrogen flowing out from each gas distribution hole 114 directly flows into the corresponding hydrogen flow channel 111, so as to effectively reduce the loss and consumption of hydrogen, and make the flow rate of hydrogen flowing through each hydrogen flow channel 111 and the flow rate of hydrogen balanced and consistent. The cross-sectional shape of the air distribution hole 114 can be set according to practical situations, for example, a round hole, an elliptical hole, a square hole, or a special-shaped hole.
Further, in the present embodiment, the step surface 115 is disposed to be inclined with respect to the plate surface of the anode plate 11 at the position. With this configuration, the contact area between the step surface 115 and the hydrogen gas can be enlarged, so that the opening size of each of the gas distribution holes 114 can be increased in a limited space, which in turn can improve the flow rate of the hydrogen gas. In addition, because the air-cooled proton exchange membrane fuel cell metal bipolar plate 100 will generate electrochemical reaction in the using process, and further generate water due to the reaction, for the air outlet channel 14, the inclined arrangement of the step surface 115 is beneficial to forming a flow guide surface, so that water stains are more quickly and thoroughly guided to the air distribution hole 114 along the flow guide surface, and efficient drainage is realized.
Next, referring to fig. 5 and fig. 8, in the present embodiment, a plurality of first protruding strips 15 are disposed at intervals along the length direction of the flow field side 1b of the anode plate 11, and a hydrogen flow channel 111 is defined between two adjacent first protruding strips 15, specifically, the plurality of first protruding strips 15 extend along the length direction and are disposed at intervals in parallel along the width direction; a plurality of second protruding strips 16 are arranged at intervals along the width direction of the flow field side 1b of the cathode plate 12, one oxygen flow channel 121 is defined between two adjacent second protruding strips 16, and similarly, the plurality of second protruding strips 16 extend along the width direction and are arranged at intervals in parallel along the length direction. The second protruding strips 16 preferably penetrate through two long sides of the metal veneer 1 to form a passage for oxygen to flow through, and facilitate rapid and thorough drainage of the oxygen flow channel 121.
In addition, the specific shapes of the first protruding strip 15 and the second protruding strip 16 are not limited in this design, and the first protruding strip 15 and the second protruding strip 16 may be linear or curved; when the first protruding strip 15 and the second protruding strip 16 are linear, the first protruding strip 15 and the second protruding strip 16 may be arranged to be gradually narrowed in width in a direction away from the corresponding flow field side 1b, specifically, the cross-sectional shapes of the first protruding strip 15 and the second protruding strip 16 may be set to be rectangular, trapezoidal with a long bottom and a short top, or convex arc, so as to expand the width of each hydrogen flow channel 111 or each oxygen flow channel 121, thereby increasing the single flow rate of gas, and being more beneficial to fully performing the electrochemical reaction.
In order to improve the sealing performance during the joining, in this embodiment, the flow field sides 1b of the two metal single plates 1 are concavely provided with first sealing grooves 3 along the circumferential direction thereof, the first sealing grooves 3 are used for being in sealing fit with first sealing elements, and the first sealing grooves 3 may be continuously arranged along the circumferential direction of the metal single plate 1 to form an annular sealing groove, or the first sealing grooves 3 may be discontinuously arranged along the circumferential direction of the metal single plate 1 to form a plurality of sealing groove segments. The specific shape and size of the first sealing groove 3 are matched with those of the first sealing element so as to avoid leakage and gas cross-over of hydrogen or oxygen.
Similarly, in order to improve the ventilation and sealing performance of the air inlet channel 13 and the air outlet channel 14, in this embodiment, a second sealing groove 4 is concavely provided on the mounting sides 1a of the two metal single plates 1 along the circumferential direction of the air inlet channel 13 and/or the air outlet channel 14, and the second sealing groove 4 is used for being in sealing fit with a second sealing member. Similarly, the second sealing groove 4 may be continuously arranged along the circumferential direction of the air inlet channel 13 or the air outlet channel 14 to form an annular sealing groove, or the second sealing groove 4 may be discontinuously arranged along the circumferential direction of the air inlet channel 13 or the air outlet channel 14 to form a plurality of sealing groove segments. The specific shape and size of the second sealing groove 4 are adapted to those of the second sealing element.
Further, in this embodiment, the two metal single plates 1 are provided with positioning holes 5 at corresponding positions. Specifically, the positioning hole 5 may be formed at any position in the middle of the metal single plate 1, and the specific forming position is based on not interfering the electrochemical reaction; or, a convex lug may be protruded from the outer peripheral side of the metal veneer 1, and the convex lug is provided with the positioning hole 5. Certainly, the number of the positioning holes 5 may be one or more, so as to achieve accurate positioning of the two metal veneers 1 after the positioning holes 5 at the corresponding positions of the two metal veneers 1 are aligned.
In addition, the present invention further provides an air-cooled proton exchange membrane fuel cell, which includes a plurality of air-cooled proton exchange membrane fuel cell metal bipolar plates 100 and a blower device, wherein the air-cooled proton exchange membrane fuel cell metal bipolar plates 100 are arranged as above, and are not described in detail herein; the air-cooled proton exchange membrane fuel cell metal bipolar plates 100 are arranged in a transverse, longitudinal or up-down stacking manner, and a membrane electrode is arranged between two adjacent air-cooled proton exchange membrane fuel cell metal bipolar plates 100 to form a complete electrochemical reaction environment. The blowing device includes a fan and other auxiliary components related to the fan, such as a control component and a connection circuit, and the fan is disposed corresponding to the oxygen channels 121 and configured to blow air to each of the oxygen channels 121. In view of the above, the oxygen channels 121 are through to two long sides of the cathode plate 12, at this time, the fan may be disposed at one long side of the cathode plate 12 and blows air towards the other long side, so that the air directly flows along the oxygen channel, and the oxygen is contained in the air, which can provide sufficient oxygen for the electrochemical environment. It should be noted that, the number of the fans may be one, or may be multiple according to actual needs, and is not limited herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The air-cooled metal bipolar plate of the proton exchange membrane fuel cell is characterized by comprising two metal single plates which are arranged in a stacking mode, wherein each metal single plate is provided with an installation side and a flow field side which are opposite to each other, and the installation sides of the two metal single plates are mutually jointed to form an air inlet channel and an air outlet channel which are arranged at intervals;
one of the two metal single plates is a cathode plate, the other metal single plate is an anode plate, a plurality of oxygen flow channels are arranged on the flow field side of the cathode plate, a plurality of hydrogen flow channels are arranged on the flow field side of the anode plate, and the hydrogen flow channels are communicated and arranged between the air inlet channel and the air outlet channel.
2. The air-cooled pem fuel cell metallic bipolar plate of claim 1, wherein said inlet channel and/or said outlet channel are provided with a plurality of connecting posts at intervals along the width direction thereof, and both ends of each connecting post are respectively connected to the mounting sides of said two metallic veneers.
3. The air-cooled pem fuel cell metallic bipolar plate of claim 2 wherein said connecting posts have an arcuate peripheral sidewall.
4. The air-cooled pem fuel cell metallic bipolar plate of claim 1 wherein said anode plate has a step portion protruding toward the flow field side thereof, said step portion defining a plenum chamber communicating said inlet channel with said hydrogen gas flow channel.
5. The air-cooled pem fuel cell metallic bipolar plate of claim 4 wherein said step portion has a step surface disposed toward said hydrogen gas flow channel, said step surface being spaced apart to define a plurality of gas distribution holes communicating with said gas distribution cavity;
wherein, the plurality of air distribution holes are arranged corresponding to the plurality of hydrogen flow channels one by one.
6. The air-cooled pem fuel cell metallic bipolar plate of claim 5 wherein said step face is inclined with respect to the face of said anode plate at the location of said step face.
7. The air-cooled pem fuel cell metallic bipolar plate of claim 1, wherein said anode plate flow field side is provided with a plurality of first ribs at intervals along the length direction thereof, and said hydrogen flow channel is defined between two adjacent first ribs;
a plurality of second raised lines are arranged on the flow field side of the cathode plate at intervals along the width direction of the cathode plate, and an oxygen flow channel is defined between every two adjacent second raised lines.
8. The air-cooled pem fuel cell metallic bipolar plate of claim 1, wherein said two metallic single plates have a first sealing groove along the circumference thereof, said first sealing groove being adapted to be sealingly engaged with a first sealing element; and/or the presence of a gas in the gas,
and the mounting sides of the two metal veneers are concavely provided with second sealing grooves along the circumferential direction of the air inlet channel and/or the air outlet channel, and the second sealing grooves are used for being in sealing fit with second sealing elements.
9. The air-cooled pem fuel cell metallic bipolar plate of claim 1 wherein said two metallic plates have locating holes at corresponding locations.
10. An air-cooled proton exchange membrane fuel cell comprising:
the air-cooled proton exchange membrane fuel cell metal bipolar plates as claimed in any one of claims 1 to 8, wherein the air-cooled proton exchange membrane fuel cell metal bipolar plates are sequentially stacked, and a membrane electrode is arranged between two adjacent air-cooled proton exchange membrane fuel cell metal bipolar plates; and the number of the first and second groups,
and the blowing device comprises a fan, and the fan is arranged corresponding to the oxygen flow channels and used for blowing air to each oxygen flow channel.
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| CN201911225562.5A CN110828846A (en) | 2019-12-02 | 2019-12-02 | Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof |
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| CN201911225562.5A CN110828846A (en) | 2019-12-02 | 2019-12-02 | Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909282A (en) * | 2021-01-29 | 2021-06-04 | 江苏大学 | Fuel cell bipolar plate and manufacturing method thereof |
| CN114373955A (en) * | 2021-12-31 | 2022-04-19 | 新源动力股份有限公司 | Proton exchange membrane fuel cell bipolar plate |
| CN115411289A (en) * | 2022-08-17 | 2022-11-29 | 西安交通大学 | Embedded bipolar plate structure of air-cooled hydrogen fuel cell stack |
-
2019
- 2019-12-02 CN CN201911225562.5A patent/CN110828846A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909282A (en) * | 2021-01-29 | 2021-06-04 | 江苏大学 | Fuel cell bipolar plate and manufacturing method thereof |
| CN112909282B (en) * | 2021-01-29 | 2022-06-21 | 江苏大学 | Fuel cell bipolar plate and manufacturing method thereof |
| CN114373955A (en) * | 2021-12-31 | 2022-04-19 | 新源动力股份有限公司 | Proton exchange membrane fuel cell bipolar plate |
| CN115411289A (en) * | 2022-08-17 | 2022-11-29 | 西安交通大学 | Embedded bipolar plate structure of air-cooled hydrogen fuel cell stack |
| CN115411289B (en) * | 2022-08-17 | 2024-03-12 | 西安交通大学 | Embedded bipolar plate structure of air-cooled hydrogen fuel cell stack |
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