Air-cooled proton exchange membrane fuel cell graphite bipolar plate and fuel cell thereof
阅读说明:本技术 风冷质子交换膜燃料电池石墨双极板及其燃料电池 (Air-cooled proton exchange membrane fuel cell graphite bipolar plate and fuel cell thereof ) 是由 裴后昌 方洲 周浩然 严清华 孙亮波 胡志刚 宋少云 于 2019-12-02 设计创作,主要内容包括:本发明公开一种风冷质子交换膜燃料电池石墨双极板及其燃料电池,风冷质子交换膜燃料电池石墨双极板包括石墨单板和两个石墨贴片,石墨单板具有第一侧和第二侧,第一侧设有多个氢气流道,第二侧设有多个氧气流道;两个石墨贴片分设于氧气流道的相对两端且与石墨单板的第二侧接合,以分别形成进气通道和出气通道,进气通道和出气通道连通氢气流道;其中,氢气流道沿石墨单板的长度方向延伸,氧气流道沿石墨单板的宽度方向延伸。本发明中,石墨单板和石墨贴片相接合并形成进气通道和出气通道,使得氢气的流通更加匀速平稳,且便利于密封;氢气流道和氧气流道流通方向相垂直,使得氢气和氧气在膜电极的两侧分布更加均匀,优化燃料电池的品质。(The invention discloses an air-cooled proton exchange membrane fuel cell graphite bipolar plate and a fuel cell thereof, wherein the air-cooled proton exchange membrane fuel cell graphite bipolar plate comprises a graphite single plate and two graphite patches, the graphite single plate is provided with a first side and a second side, the first side is provided with a plurality of hydrogen runners, and the second side is provided with a plurality of oxygen runners; the two graphite patches are respectively arranged at two opposite ends of the oxygen flow channel and are jointed with the second side of the graphite single plate to respectively form an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are communicated with the hydrogen flow channel; the hydrogen flow channel extends along the length direction of the graphite single plate, and the oxygen flow channel extends along the width direction of the graphite single plate. In the invention, the graphite single plate and the graphite patch are combined to form the gas inlet channel and the gas outlet channel, so that the circulation of hydrogen is more uniform and stable, and the sealing is facilitated; the flow direction of the hydrogen flow channel is vertical to that of the oxygen flow channel, so that the hydrogen and the oxygen are distributed more uniformly on two sides of the membrane electrode, and the quality of the fuel cell is optimized.)
1. An air-cooled proton exchange membrane fuel cell graphite bipolar plate is characterized by comprising:
the graphite single plate is provided with a first side and a second side which are opposite, the first side is provided with a plurality of hydrogen runners, and the second side is provided with a plurality of oxygen runners corresponding to the plurality of hydrogen runners; and the number of the first and second groups,
the two graphite patches are respectively arranged at two opposite ends of the oxygen flow channel and are jointed with the second side of the graphite single plate so as to respectively enclose the second side of the graphite single plate to form an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are communicated with the hydrogen flow channel;
the hydrogen flow channel extends along the length direction of the graphite single plate, and the oxygen flow channel extends along the width direction of the graphite single plate.
2. The air-cooled pem fuel cell graphite bipolar plate of claim 1, wherein a first side of said graphite single plate is provided with a plurality of first ribs at intervals along a length direction thereof, and a hydrogen flow channel is defined between two adjacent first ribs;
and a plurality of second convex strips are arranged at intervals on the second side of the graphite single plate along the width direction of the graphite single plate, and an oxygen flow channel is defined between every two adjacent second convex strips.
3. The air-cooled pem fuel cell graphite bipolar plate of claim 1, wherein a plurality of gas distribution channels are arranged between said hydrogen flow channel and said gas inlet channel and/or between said hydrogen flow channel and said gas outlet channel, and said plurality of gas distribution channels are arranged along the width direction of said graphite single plate at intervals.
4. The air-cooled pem fuel cell graphite bipolar plate of claim 3, wherein a plurality of protrusions are dispersedly disposed on a first side of said graphite single plate, said plurality of protrusions are disposed on upper and lower ends of said hydrogen flow channel, and said air distribution channel is formed between two adjacent protrusions.
5. The air-cooled PEMFC graphite bipolar plate as in claim 4 wherein the peripheral side walls of said protrusions are disposed in the form of arcs; and/or the presence of a gas in the gas,
the plurality of convex parts are distributed in an array shape.
6. The air-cooled pem fuel cell graphite bipolar plate of claim 1 wherein said graphite single plate has two opposite sides across its width;
the plurality of oxygen runners penetrate through two side parts of the graphite veneer.
7. The air-cooled pem fuel cell graphite bipolar plate of claim 1, wherein said inlet channel and/or said outlet channel are spaced apart along the width direction thereof by a plurality of ribs extending along the gas flow direction, each of said ribs connecting said second side of said graphite single plate to said graphite patch.
8. The air-cooled pem fuel cell graphite bipolar plate of claim 1, wherein said first and second sides of said graphite single plate are recessed with sealing grooves along the circumferential direction thereof, respectively, said sealing grooves being adapted to sealingly engage with a sealing member; and/or the presence of a gas in the gas,
the graphite veneer is concavely provided with a glue groove along the circumferential direction of the air inlet channel and/or the air outlet channel, and the glue groove is used for glue filling and bonding.
9. An air-cooled proton exchange membrane fuel cell comprising:
the air-cooled proton exchange membrane fuel cell graphite bipolar plates as claimed in any one of claims 1 to 8, wherein the air-cooled proton exchange membrane fuel cell graphite bipolar plates are sequentially stacked, and a membrane electrode is arranged between two adjacent air-cooled proton exchange membrane fuel cell graphite 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 of the graphite veneer and used for blowing air to each oxygen flow channel.
10. The air-cooled pem fuel cell of claim 9 wherein said air-cooled pem fuel cell graphite cell further comprises a screen, said screen being disposed at least between said fan and said oxygen flow channel.
Technical Field
The invention relates to the technical field of proton exchange membrane fuel cells, in particular to an air-cooled graphite bipolar plate of a proton exchange membrane fuel cell and a fuel cell thereof.
Background
The graphite bipolar plate is widely used for proton exchange membrane fuel cells, and because the mass of the bipolar plate accounts for 60-70% of the whole stack, the bipolar plate directly influences the whole weight and volume of the proton exchange membrane fuel cell. The bipolar plate mainly plays roles of transmitting heat, collecting current, providing a gas channel and the like. The graphite bipolar plate has the advantages of good electric and heat conducting properties, low resistance, strong corrosion resistance, light weight, suitability for batch processing and the like, but the structure of the existing graphite bipolar plate has disadvantages, so that the gas is unevenly distributed in a flow field, and the quality of a fuel cell is influenced.
Disclosure of Invention
The invention mainly aims to provide an air-cooled proton exchange membrane fuel cell graphite bipolar plate and a fuel cell thereof, aiming at solving the problem that the gas in the traditional graphite bipolar plate is not uniformly distributed in a flow field.
In order to achieve the above object, the present invention provides a graphite bipolar plate for an air-cooled proton exchange membrane fuel cell, comprising:
the graphite single plate is provided with a first side and a second side which are opposite, the first side is provided with a plurality of hydrogen runners, and the second side is provided with a plurality of oxygen runners corresponding to the plurality of hydrogen runners; and the number of the first and second groups,
the two graphite patches are respectively arranged at two opposite ends of the oxygen flow channel and are jointed with the second side of the graphite single plate so as to respectively enclose the second side of the graphite single plate to form an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are communicated with the hydrogen flow channel;
the hydrogen flow channel extends along the length direction of the graphite single plate, and the oxygen flow channel extends along the width direction of the graphite single plate.
Optionally, a plurality of gas distribution channels are communicated between the hydrogen flow channel and the gas inlet channel and/or between the hydrogen flow channel and the gas outlet channel, and the plurality of gas distribution channels are arranged at intervals along the width direction of the graphite single plate.
Optionally, the first side of the graphite single plate is provided with a plurality of protrusions in a dispersed manner, the plurality of protrusions are arranged at the upper and lower ends of the hydrogen flow channel, and the gas distribution channel is formed between two adjacent protrusions.
Optionally, the peripheral side wall of the convex part is arranged in an arc surface shape; and/or the presence of a gas in the gas,
the plurality of convex parts are distributed in an array shape.
Optionally, the graphite single plate has two opposite side portions in the width direction thereof;
the plurality of oxygen runners penetrate through two side parts of the graphite veneer.
Optionally, the air inlet channel and/or the air outlet channel are provided with a plurality of ribs at intervals along the width direction thereof, the plurality of ribs extend along the air circulation direction, and each rib is connected with the second side of the graphite veneer and the graphite patch.
Optionally, the first side and the second side of the graphite single plate are respectively provided with a sealing groove along the circumferential direction thereof in a concave manner, and the sealing grooves are used for being in sealing fit with the sealing element; and/or the presence of a gas in the gas,
the graphite veneer is concavely provided with a glue groove along the circumferential direction of the air inlet channel and/or the air outlet channel, and the glue groove is used for glue filling and bonding.
In addition, the invention also provides an air-cooled proton exchange membrane fuel cell, which comprises:
the air-cooled proton exchange membrane fuel cell graphite 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 graphite 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 of the graphite veneer and used for blowing air to each oxygen flow channel.
Optionally, the air-cooled proton exchange membrane fuel cell graphite battery further comprises a filter screen, and the filter screen is at least arranged between the fan and the oxygen flow channel.
In the technical scheme provided by the invention, the graphite single plate is jointed with the graphite patch, and the air inlet channel and the air outlet channel are formed on the opposite sides of the hydrogen flow channel, so that the hydrogen flows more stably at a uniform speed, and the sealing is facilitated; the hydrogen runner extends along the length direction of the graphite single plate, and the oxygen runner extends along the width direction of the graphite single plate, so that the hydrogen and the oxygen are distributed more uniformly on two sides of the membrane electrode, 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 graphite bipolar plate for 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 structural diagram of a second side of the graphite single plate in FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 3;
fig. 5 is a schematic structural view of the graphite patch of fig. 1.
The reference numbers illustrate:
reference numerals
Name (R)
Reference numerals
Name (R)
100
Air-cooled proton exchange membrane fuel cell graphite
2
1
31
11
32
111
Hydrogen flow channel
4
Convex
12
41
121
5
Convex
13
6
Sealing groove
14
Second convex strip
7
Glue groove
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 graphite bipolar plate is widely used for proton exchange membrane fuel cells, and because the mass of the bipolar plate accounts for 60-70% of the whole stack, the bipolar plate directly influences the whole weight and volume of the proton exchange membrane fuel cell. The bipolar plate mainly plays roles of transmitting heat, collecting current, providing a gas channel and the like. The graphite bipolar plate has the advantages of good electric and heat conducting properties, low resistance, strong corrosion resistance, light weight, suitability for batch processing and the like, but the structure of the existing graphite bipolar plate has disadvantages, so that the gas is unevenly distributed in a flow field, and the quality of a fuel cell is influenced.
In view of the above, the present invention provides a graphite bipolar plate for an air-cooled pem fuel cell, and fig. 1 to 5 show embodiments of the graphite bipolar plate for an air-cooled pem fuel cell according to the present invention.
Referring to fig. 1, fig. 3 and fig. 5, a graphite
In the technical scheme provided by the invention, the graphite
The design does not limit the specific shape, size, and material of the graphite
The position of the
Of course, the specific shape and size of the
In addition, the
Specifically, referring to fig. 2 and 4, in the present embodiment, a plurality of
In addition, the specific shapes of the
Further, in the present embodiment, the graphite
Further, referring to fig. 1 to fig. 2, in the present embodiment, a plurality of
In the present embodiment, a plurality of protrusions 4 are provided on the
Further, in the present embodiment, the outer peripheral side wall of the projection 4 is provided in a curved surface shape, or the projection 4 may be a polyhedron. For example, the outer peripheral side wall of the convex portion 4 is arc-surface-shaped, and the convex portion 4 can be specifically arranged as a cylinder or a hemisphere, so that the sharp position formed in the
Further, referring to fig. 3 to 5, in this embodiment, a plurality of
In practical application, the
In order to improve the ventilation and sealing performance of the
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 graphite
Further, in this embodiment, the air-cooled pem fuel cell graphite cell further includes a filter screen, and the filter screen is at least disposed between the fan and the
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.
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