CN112768717B - Circular fuel cell bipolar plate - Google Patents

Circular fuel cell bipolar plate Download PDF

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Publication number
CN112768717B
CN112768717B CN202011635482.XA CN202011635482A CN112768717B CN 112768717 B CN112768717 B CN 112768717B CN 202011635482 A CN202011635482 A CN 202011635482A CN 112768717 B CN112768717 B CN 112768717B
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Prior art keywords
flow field
oxygen
hydrogen
plate
bipolar plate
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CN202011635482.XA
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CN112768717A (en
Inventor
韩冰峰
程敏
窦永香
刘振
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Sunrise Power Co Ltd
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Sunrise Power Co Ltd
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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
    • 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
    • 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
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The invention provides a circular fuel cell bipolar plate, which is circular, wherein the outer edge part of the bipolar plate is provided with a group of hydrogen flow field inlets and hydrogen flow field outlets, at least one group of oxygen flow field inlets and oxygen flow field outlets, and a group of coolant flow field inlets and coolant flow field outlets, which axially penetrate through the bipolar plate, and the inlets and outlets in each group are symmetrically arranged around the center of the axis of the bipolar plate; the bipolar plate comprises an oxygen unipolar plate and a hydrogen unipolar plate which are fixedly attached together; the hydrogen unipolar plate has a hydrogen flow field on one side, and the oxygen unipolar plate both sides have coolant flow field and oxygen flow field respectively. In the technical scheme of the invention, the bipolar plate has the advantages of compact structure, easy sealing and high production efficiency, is suitable for a graphite bipolar plate structure, is easy to assemble into a fuel cell rod, and is suitable for using occasions with higher space requirements, such as a submarine aircraft and the like.

Description

Circular fuel cell bipolar plate
Technical Field
The invention relates to the technical field of bipolar plates, in particular to a circular bipolar plate, and especially relates to a circular fuel cell bipolar plate.
Background
Fuel cell rods must use circular bipolar plate configurations, but currently there are few circular bipolar plate configurations. And the circular bipolar plate structure is roughly divided into two types, one is an annular circular bipolar plate structure, and the other is a vein-shaped interdigitated circular bipolar plate. The flow field structure of the circular bipolar plates with the two structures is complex, and the structure space of the circular bipolar plate is not well utilized at the inlet and the outlet of the three cavities.
Disclosure of Invention
In accordance with the above technical problem, a circular fuel cell bipolar plate is provided.
The technical means adopted by the invention are as follows:
a circular fuel cell bipolar plate is characterized in that the bipolar plate is circular, the outer edge part of the bipolar plate is provided with a group of hydrogen flow field inlets and hydrogen flow field outlets, at least one group of oxygen flow field inlets and oxygen flow field outlets, and a group of coolant flow field inlets and coolant flow field outlets, which axially penetrate through the bipolar plate, and the inlets and outlets in each group are symmetrically arranged around the axial center of the bipolar plate;
the bipolar plate comprises an oxygen unipolar plate and a hydrogen unipolar plate which are fixedly attached together;
a hydrogen flow field arranged in the middle of the hydrogen unipolar plate is arranged on one side of the hydrogen unipolar plate, which is far away from the oxygen unipolar plate, and the hydrogen flow field is respectively communicated with the hydrogen flow field inlet and the hydrogen flow field outlet; only one side of the hydrogen unipolar plate is provided with a flow field, so that the thickness of the hydrogen unipolar plate is reduced, and the axial hydrogen permeation condition of the hydrogen unipolar plate is reduced.
One side of the oxygen unipolar plate, which is far away from the hydrogen unipolar plate, is provided with an oxygen flow field arranged in the middle of the oxygen unipolar plate, and the oxygen flow field is respectively communicated with the oxygen flow field inlet and the oxygen flow field outlet;
and one side of the oxygen unipolar plate, which is close to the hydrogen unipolar plate, is provided with a coolant flow field arranged in the middle of the oxygen unipolar plate, and the coolant flow field is respectively communicated with the coolant flow field inlet and the coolant flow field outlet.
And the oxygen flow field comprises two groups of oxygen flow field inlets and two groups of oxygen flow field outlets, the two oxygen flow field inlets are communicated through an external pipeline, and the two oxygen flow field outlets are communicated through an external pipeline. The adoption of the two groups of the oxygen flow field inlets and the oxygen flow field outlets is beneficial to improving the oxygen content and reducing the power consumption of the air compressor.
Further, one of the oxygen flow field outlets is disposed between the coolant flow field inlet and the hydrogen flow field inlet, and the other of the oxygen flow field outlets is disposed between the hydrogen flow field inlet and the coolant flow field outlet.
Further, the hydrogen flow field, the oxygen flow field, and the coolant flow field are all direct flow fields.
Furthermore, the hydrogen flow field, the oxygen flow field and the coolant flow field all comprise circular grooves and a plurality of rib plates which are fixed in the circular grooves and arranged in parallel, and straight flow channels are formed between two adjacent rib plates.
Further, the oxygen unipolar plate and the hydrogen unipolar plate are fixed by gluing.
Further, the hydrogen unipolar plate and the oxygen unipolar plate are manufactured by machining or molding a graphite plate.
Furthermore, the medium flowing in the hydrogen flow field is hydrogen, the medium flowing in the oxygen flow field is air or oxygen, and the medium flowing in the coolant flow field is deionized water.
Compared with the prior art, the invention has the following advantages:
in the technical scheme of the invention, the bipolar plate has the advantages of compact structure, easy sealing and high production efficiency, is suitable for a graphite bipolar plate structure, is easy to assemble into a fuel cell rod, and is suitable for using occasions with higher space requirements, such as a submarine aircraft and the like.
The invention can be widely popularized in the fields of bipolar plates and the like for the reasons.
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 introduced 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 circular fuel cell bipolar plate according to an embodiment of the present invention.
Fig. 2 is a front view of a hydrogen gas flow field of a hydrogen unipolar plate according to an embodiment of the present invention.
Fig. 3 is a side elevational view of an oxygen flow field of an oxygen unipolar plate in an embodiment of the present invention.
Fig. 4 is a side elevational view of a coolant flow field of an oxygen unipolar plate in an embodiment of the present invention.
In the figure: 1. an oxygen monopolar plate; 2. a hydrogen monopolar plate; 3. a coolant flow field inlet; 4. an oxygen flow field outlet a; 5. a hydrogen flow field inlet; 6. an oxygen flow field outlet b; 7. a coolant flow field outlet; 8. oxygen flow field inlets a, 9 and a hydrogen flow field outlet; 10. an oxygen flow field inlet b; 11. a hydrogen flow field; 12. an oxygen flow field; 13. a coolant flow field; 14. a circular groove; 15. and a rib plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 4, a circular bipolar plate for a fuel cell is circular, and the outer edge portion of the bipolar plate has a set of hydrogen flow field inlet 5 and hydrogen flow field outlet 9, at least one set of oxygen flow field inlet and oxygen flow field outlet (in this embodiment, two sets are used, respectively, oxygen flow field inlet a8, oxygen flow field inlet b10, oxygen flow field outlet a4 and oxygen flow field outlet b6), and a set of coolant flow field inlet 3 and coolant flow field outlet 7, and the inlets and outlets in each set are symmetrically arranged around the axial center of the bipolar plate;
the bipolar plate comprises an oxygen unipolar plate 1 and a hydrogen unipolar plate 2 which are fixedly attached together;
a hydrogen flow field 11 arranged in the middle of the hydrogen unipolar plate 2 is arranged on one side of the hydrogen unipolar plate 2, which is far away from the oxygen unipolar plate 1, and the hydrogen flow field 11 is respectively communicated with the hydrogen flow field inlet 5 and the hydrogen flow field outlet 9; only one side of the hydrogen unipolar plate 2 is provided with a flow field, so that the thickness of the hydrogen unipolar plate 2 is reduced, and the axial hydrogen permeation condition of the hydrogen unipolar plate 2 is reduced.
The side of the oxygen unipolar plate 1, which is far away from the hydrogen unipolar plate 2, is provided with an oxygen flow field 12 arranged in the middle of the oxygen unipolar plate 1, and the oxygen flow field 12 is respectively communicated with the oxygen flow field inlet a8, the oxygen flow field inlet b10, the oxygen flow field outlet a4 and the oxygen flow field outlet b 6;
the side of the oxygen unipolar plate 1 close to the hydrogen unipolar plate 2 is provided with a coolant flow field 13 arranged in the middle of the oxygen unipolar plate 1, and the coolant flow field 13 is respectively communicated with the coolant flow field inlet 3 and the coolant flow field outlet 7.
The oxygen flow field outlet a4 is disposed between the coolant flow field inlet 3 and the hydrogen flow field inlet 5, and the oxygen flow field outlet b6 is disposed between the hydrogen flow field inlet 5 and the coolant flow field outlet 7.
The hydrogen flow field, the oxygen flow field, and the coolant flow field are all direct flow fields.
The hydrogen flow field, the oxygen flow field and the coolant flow field all comprise circular grooves 14 and a plurality of rib plates 15 which are fixed in the circular grooves 14 and arranged in parallel, and straight flow channels are formed between two adjacent rib plates.
The oxygen unipolar plate 1 and the hydrogen unipolar plate 2 are fixed by gluing.
The hydrogen unipolar plate 1 and the oxygen unipolar plate 2 are manufactured by adopting a machining or die pressing graphite plate.
The medium flowing in the hydrogen flow field 11 is hydrogen, the medium flowing in the oxygen flow field 12 is air or oxygen, and the medium flowing in the coolant flow field 13 is deionized water.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A circular fuel cell bipolar plate is characterized in that the bipolar plate is circular, the outer edge part of the bipolar plate is provided with a group of hydrogen flow field inlets and hydrogen flow field outlets, two groups of oxygen flow field inlets and oxygen flow field outlets, and a group of coolant flow field inlets and coolant flow field outlets which axially penetrate through the bipolar plate, and the inlets and the outlets in each group are symmetrically arranged around the axial center of the bipolar plate;
the bipolar plate comprises an oxygen unipolar plate and a hydrogen unipolar plate which are fixedly attached together;
a hydrogen flow field arranged in the middle of the hydrogen unipolar plate is arranged on one side of the hydrogen unipolar plate, which is far away from the oxygen unipolar plate, and the hydrogen flow field is respectively communicated with the hydrogen flow field inlet and the hydrogen flow field outlet;
one side of the oxygen unipolar plate, which is far away from the hydrogen unipolar plate, is provided with an oxygen flow field arranged in the middle of the oxygen unipolar plate, and the oxygen flow field is respectively communicated with the oxygen flow field inlet and the oxygen flow field outlet;
one side of the oxygen unipolar plate, which is close to the hydrogen unipolar plate, is provided with a coolant flow field arranged in the middle of the oxygen unipolar plate, and the coolant flow field is respectively communicated with the coolant flow field inlet and the coolant flow field outlet;
one of the oxygen flow field outlets is disposed between the coolant flow field inlet and the hydrogen flow field inlet and the other of the oxygen flow field outlets is disposed between the hydrogen flow field inlet and the coolant flow field outlet.
2. The circular fuel cell bipolar plate as in claim 1, wherein two of said oxygen flow field inlets are in communication via external plumbing and two of said oxygen flow field outlets are in communication via external plumbing.
3. A circular fuel cell bipolar plate as in claim 1, wherein said hydrogen flow field, said oxygen flow field and said coolant flow field are all direct flow fields.
4. The circular fuel cell bipolar plate of claim 3, wherein said hydrogen flow field, said oxygen flow field and said coolant flow field each comprise a circular groove and a plurality of parallel ribs secured within said circular groove, a straight flow channel being formed between adjacent ribs.
5. The circular fuel cell bipolar plate of claim 1, wherein said oxygen unipolar plate and said hydrogen unipolar plate are fixed by gluing.
6. A circular fuel cell bipolar plate as in claim 1, wherein said hydrogen and oxygen unipolar plates are fabricated using machined graphite plates.
7. A circular fuel cell bipolar plate as in claim 1, wherein said hydrogen and oxygen unipolar plates are fabricated from a stamped graphite sheet.
8. The circular fuel cell bipolar plate as in claim 1, wherein the media circulated in said hydrogen flow field is hydrogen, the media circulated in said oxygen flow field is air or oxygen, and the media circulated in said coolant flow field is deionized water.
CN202011635482.XA 2020-12-31 2020-12-31 Circular fuel cell bipolar plate Active CN112768717B (en)

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CN112768717B true CN112768717B (en) 2022-05-31

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102104150A (en) * 2011-01-18 2011-06-22 浙江工业大学 Bipolar plate with mosquito incense type flow field distribution structure
CN103441285A (en) * 2013-09-06 2013-12-11 江苏艾维佳新能源科技有限公司 Circular fuel cell bipolar plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102104150A (en) * 2011-01-18 2011-06-22 浙江工业大学 Bipolar plate with mosquito incense type flow field distribution structure
CN103441285A (en) * 2013-09-06 2013-12-11 江苏艾维佳新能源科技有限公司 Circular fuel cell bipolar plate

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