CN215418241U - Fuel cell bipolar plate and fuel cell - Google Patents
Fuel cell bipolar plate and fuel cell Download PDFInfo
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- CN215418241U CN215418241U CN202121865025.XU CN202121865025U CN215418241U CN 215418241 U CN215418241 U CN 215418241U CN 202121865025 U CN202121865025 U CN 202121865025U CN 215418241 U CN215418241 U CN 215418241U
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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
Abstract
The application provides a fuel cell bipolar plate and a fuel cell. A fuel cell bipolar plate includes a bipolar plate body having opposing first and second sides; the first side surface is provided with a plurality of hydrogen flow channels and a flow distribution structure for distributing hydrogen for the hydrogen flow channels, and the flow distribution structure comprises a dispersion area and a plurality of flow guide channels; the flow guide channel is communicated with the dispersion area, and a plurality of flow guide strips and flow distribution convex columns are sequentially arranged in the dispersion area along the flow direction of hydrogen, so that the hydrogen sequentially passes through the flow guide channel, the flow guide strips and the flow distribution convex columns and then enters the hydrogen flow channel after being dispersed. This application has guaranteed fuel cell bipolar plate flow field chemical composition distribution homogeneity through set up drainage channel, drainage strip and reposition of redundant personnel projection structure at bipolar plate, avoids the phenomenon of fuel cell local overheat or local water logging of production fuel cell, has improved fuel cell's performance and life.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate and a fuel cell.
Background
The fuel cell bipolar plate is one of important components of a fuel cell, and has many important functions of separating hydrogen from oxygen, supporting a membrane electrode, collecting electrons, conducting heat, providing hydrogen and oxygen channels, discharging reaction water, providing a cooling flow channel, and the like, and the performance of the fuel cell bipolar plate depends on a flow field structure to a great extent.
At present, the flow field structure of the fuel cell bipolar plate has the defects of uneven distribution of chemical components, uneven current density, local cell overheating or local water flooding of the fuel cell, and the service life of the fuel cell is shortened while the performance of the fuel cell is influenced. Therefore, how to solve the problem of uneven flow field distribution of the bipolar plate of the fuel cell becomes the direction of efforts of those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The application provides a fuel cell bipolar plate and a fuel cell. Aiming at solving the problem of uneven flow field distribution of the bipolar plate of the fuel cell.
In a first aspect, the present application provides a fuel cell bipolar plate comprising:
a bipolar plate body having opposing first and second sides;
the first side surface is provided with a plurality of hydrogen flow channels and a flow distribution structure for distributing hydrogen for the hydrogen flow channels, and the flow distribution structure comprises a dispersion area and a plurality of flow guide channels;
wherein, drainage channel and disperse area intercommunication are equipped with many drainage strips and reposition of redundant personnel projection in proper order along hydrogen flow direction in the disperse area to make hydrogen get into the hydrogen runner after drainage channel, drainage strip and reposition of redundant personnel projection disperse in proper order.
In some embodiments, the bipolar plate body further has a hydrogen inlet, one end of the plurality of flow guide channels is gathered and communicated with the hydrogen inlet, and the other end of the plurality of flow guide channels is scattered and communicated with the dispersion area;
one end of each drainage strip is gathered to extend towards the drainage channel, and the other end of each drainage strip is scattered to extend towards the flow distribution convex column.
In some embodiments, one end of the drainage strip is located between the outlets of the adjacent drainage channels, and the other end of the drainage strip extends towards the flow distribution convex column.
In some embodiments, the plurality of flow strips includes a plurality of first flow strips and a plurality of second flow strips arranged along the hydrogen flow direction;
one end of each of the first drainage strips extends to the drainage channel in a gathering shape, and the other end of each of the first drainage strips extends to the second drainage strip in a scattering shape;
one end of each second drainage strip is gathered to extend towards the first drainage strip, and the other end of each second drainage strip is scattered to extend towards the flow dividing convex column.
In some embodiments, one end of the first flow-directing strip is located between the outlets of adjacent flow-directing channels, and the other end extends towards the second flow-directing strip;
one end of the second drainage strip is positioned between the adjacent first drainage strips, and the other end of the second drainage strip extends towards the flow dividing convex column.
In some embodiments, the hydrogen flow channels are arranged in parallel side by side, and the bottom of each hydrogen flow channel is provided with a plurality of arc grooves and arc protrusions which are arranged at intervals.
In some embodiments, each hydrogen flow channel has a plurality of meanders, with at least one arcuate groove and/or arcuate protrusion within each meander.
In some embodiments, there is at least one arcuate projection between adjacent serpentines; or
Adjacent meanders have at least one arcuate groove therebetween.
In some embodiments, the second side is provided with a plurality of oxygen flow channels;
the hydrogen flow channel extends along the length direction of the bipolar plate body, and the oxygen flow channel extends along the width direction of the bipolar plate body; or
The hydrogen flow channel extends along the width direction of the bipolar plate body, and the oxygen flow channel extends along the length direction of the bipolar plate body.
In a second aspect, the present application provides a fuel cell comprising a fuel cell bipolar plate as described in the first aspect.
This application is through setting up flow guide channel at bipolar plate, flow guide strip and reposition of redundant personnel projection structure, make hydrogen pass through flow guide channel and flow guide strip dispersion in proper order, then the reposition of redundant personnel projection that gets into the array distributes hydrogen for a plurality of hydrogen gas runner, owing to pass through flow guide channel and flow guide strip dispersion in advance, make distribution that hydrogen can be even to reposition of redundant personnel projection, thereby the reposition of redundant personnel projection that passes through the array distributes hydrogen for hydrogen gas runner, fuel cell bipolar plate flow field chemical composition distribution homogeneity has been guaranteed, avoid the local overheated or the phenomenon that produces the local water logging of fuel cell, fuel cell's performance and life have been improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a first side of a bipolar plate for a fuel cell provided in an embodiment of the present application;
FIG. 2 is an axial schematic view of a fuel cell bipolar plate provided in an embodiment of the present application;
FIG. 3 is an enlarged partial schematic view of the application at A in FIG. 1;
FIG. 4 is another enlarged partial schematic view taken at A of FIG. 1 of the present application;
FIG. 5 is an enlarged partial schematic view of the present application at B in FIG. 2;
FIG. 6 is a schematic view showing a structure of a hydrogen flow channel provided in the embodiment of the present application;
figure 7 is a schematic view of a configuration of the second side of a bipolar plate for a fuel cell provided in an embodiment of the present application.
Wherein:
a 10 bipolar plate body, a 110 first side, a 120 second side, 11 hydrogen flow channels, 111 arc-shaped protrusions, 112 arc-shaped grooves, 113 serpentine portions, 12 oxygen flow channels;
13 reposition of redundant personnel structure, 131 flow guide channel, 132 dispersion district, 1321 drainage strip, the first drainage strip of 1301, 1302 second drainage strip, 1322 reposition of redundant personnel projection, 133 hydrogen inlet.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the utility model with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Embodiments of the present invention provide a bipolar plate for a fuel cell and a fuel cell, which will be described in detail below.
Referring first to fig. 1 and 2, fig. 1 shows a schematic view of a first side 110 of a bipolar plate for a fuel cell in an embodiment of the present disclosure, and fig. 2 shows an axial view of a bipolar plate for a fuel cell in an embodiment of the present disclosure, wherein the bipolar plate for a fuel cell comprises:
a bipolar plate body 10, the bipolar plate body 10 having opposing first and second sides 110, 120;
the first side 110 is provided with a plurality of hydrogen flow channels 11, and a flow dividing structure 13 for distributing hydrogen gas to the plurality of hydrogen flow channels 11, wherein the flow dividing structure 13 comprises a dispersing area 132 and a plurality of flow guiding channels 131;
the flow guide channel 131 is communicated with the dispersion area 132, and a plurality of flow guide strips 1321 and flow distribution convex columns 1322 are sequentially arranged in the dispersion area 132 along the hydrogen flowing direction, so that the hydrogen sequentially passes through the flow guide channel 131, the flow guide strips 1321 and the flow distribution convex columns 1322 to be dispersed and then enters the hydrogen flow channel 11.
This application is through setting up flow guide channel 131 at bipolar plate, flow guide strip 1321 and reposition of redundant personnel projection 1322 structure, make hydrogen pass through flow guide channel 131 and flow guide strip 1321 dispersion in proper order, then reentrant the reposition of redundant personnel projection 1322 of array be a plurality of hydrogen gas runner 11 distribution hydrogen, owing to pass through flow guide channel 131 and flow guide strip 1321 dispersion in advance, make the distribution that hydrogen can be even reposition of redundant personnel projection 1322, thereby pass through the reposition of redundant personnel projection 1322 of array for hydrogen gas runner 11 distribution hydrogen, fuel cell bipolar plate flow field chemical composition distribution uniformity has been guaranteed, avoid the phenomenon of fuel cell local overheat or local water logging of production fuel cell, the performance and the life of fuel cell have been improved.
Specifically, the bipolar plate body 10 is used to separate hydrogen from oxygen, and provide hydrogen and oxygen channels. Illustratively, the bipolar plate body 10 may be a graphite bipolar plate, a metal bipolar plate, a composite bipolar plate, or the like. The bipolar plate body 10 has a first side surface 110 and a second side surface 120 opposite to each other, the first side surface 110 is provided with a plurality of hydrogen flow channels 11, during the operation of the fuel cell, hydrogen is uniformly distributed on the first side surface 110 through the hydrogen flow channels 11, and a membrane electrode adjacent to the bipolar plate body 10 generates an electrochemical reaction through hydrogen, so as to achieve the purpose of converting hydrogen energy into electric energy.
However, the flow field of the bipolar plate of the cell needs to ensure uniform distribution of chemical components to avoid local overheating of the cell or local flooding of the fuel cell caused by non-uniform current density, in some embodiments of the present application, for example, for embodiments where the bipolar plate body 10 has a first side 110 and a second side 120 opposite to each other, referring to fig. 1 and fig. 3, fig. 3 shows a partially enlarged schematic view of a in fig. 1 in the embodiments of the present application, the first side 110 is provided with a flow dividing structure 13 for distributing hydrogen to the plurality of hydrogen flow channels 11, and the flow dividing structure 13 includes a dispersing area 132 and a plurality of flow guiding channels 131. During operation of the fuel cell, hydrogen gas enters the dispersion region 132 through the diversion channel 131, and then enters the hydrogen flow channel 11 after being dispersed through the dispersion region 132. Because the injected hydrogen is shunted by the plurality of diversion channels 131 in advance, the phenomenon that the hydrogen cannot be uniformly dispersed due to the concentrated hydrogen entering the dispersion area 132 can be avoided.
Specifically, a plurality of flow guide strips 1321 and flow dividing convex columns 1322 are sequentially arranged in the dispersion area 132 along the hydrogen flowing direction, so that hydrogen sequentially enters the flow dividing convex columns 1322 after being dispersed through the flow guide channels 131 and the flow guide strips 1321, and the hydrogen can be uniformly distributed to the flow dividing convex columns 1322 due to being dispersed through the flow guide channels 131 and the flow guide strips 1321 in advance, so that the hydrogen is distributed to the hydrogen flow channels 11 through the flow dividing convex columns 1322 of the array, and the distribution uniformity of chemical components in the flow field of the fuel cell bipolar plate is ensured.
As an example, referring to fig. 3, the bipolar plate body 10 further has a hydrogen inlet 133, one end of the plurality of flow guiding channels 131 is connected to the hydrogen inlet 133 in a gathering manner, and the other end is connected to the dispersing area 132 in a scattering manner; one end of each of the plurality of flow guiding strips 1321 is gathered to extend towards the flow guiding channel 131, and the other end is scattered to extend towards the flow dividing convex column 1322.
During the operation of the fuel cell, hydrogen flows into the flow guiding channel 131 through the hydrogen inlet 133, and is dispersed to the dispersing area 132 through the flow guiding channel 131 in a scattering shape, so as to realize the first longitudinal dispersing process of the hydrogen; when the hydrogen gas flows into the area of the flow guide strips 1321 in the dispersion area 132, the scattered flow guide strips 1321 disperse the hydrogen gas again and provide the hydrogen gas to the flow dividing convex columns 1322 of the array, so that the second longitudinal dispersion process of the hydrogen gas is realized, the hydrogen gas can be uniformly dispersed to the flow dividing convex columns 1322 after the second longitudinal dispersion, and then the hydrogen gas is uniformly distributed to the hydrogen gas flow channels 11 through the flow dividing convex columns 1322 of the array, so that the dispersion uniformity of the hydrogen gas after the hydrogen gas flows in is ensured.
It can be understood that the flow guiding channels 131 and the flow guiding strips 1321 can also be arranged in parallel side by side, or the flow guiding channels 131 and the flow guiding strips 1321 can be arranged at vertical intervals, so as to ensure the uniformity of hydrogen distribution when the flow guiding channels 131 and the flow guiding strips 1321 are arranged in parallel side by side.
In order to further improve the uniformity of the hydrogen dispersed by the flow guide channels 131 and the flow guide strips 1321, in some embodiments of the present application, for example, for the embodiment in which the flow guide channels 131 and the flow guide strips 1321 are distributed in a scattering manner, referring to fig. 3, one end of each flow guide strip 1321 is located between the outlets of the adjacent flow guide channels 131, and the other end of each flow guide strip 1321 extends towards the flow dividing convex column 1322, that is, the flow guide strips 1321 and the flow guide channels 131 are arranged at intervals, so that a channel opposite to the flow guide channel 131 is formed between the adjacent flow guide strips 1321, so that the hydrogen in the flow guide channels 131 is better guided and dispersed, and the phenomenon that the hydrogen is unevenly distributed due to the fact that the flow velocity is too fast after the hydrogen passes through the flow guide channels 131 is avoided.
As another example, fig. 4 shows another partial enlarged schematic view of a in fig. 1 in the embodiment of the present application, wherein the plurality of flow-guiding strips 1321 includes a plurality of first flow-guiding strips 1301 and a plurality of second flow-guiding strips 1302 arranged in the hydrogen flow direction; one end of each of the first drainage strips 1301 is gathered and extends towards the drainage channel 131, and the other end of each of the first drainage strips is scattered and extends towards the second drainage strip 1302; one end of each of the second drainage strips 1302 extends toward the first drainage strip 1301 in a gathering manner, and the other end extends toward the splitting convex column 1322 in a scattering manner.
During the operation of the fuel cell, hydrogen flows into the flow guiding channel 131 through the hydrogen inlet 133, and is dispersed to the dispersing area 132 through the flow guiding channel 131 in a scattering shape, so as to realize the first longitudinal dispersing process of the hydrogen; when the hydrogen gas flows into the first flow guide strips 1301 area in the dispersion area 132, the scattering first flow guide strips 1301 disperse the hydrogen gas again and provide the hydrogen gas to the scattering second flow guide strips 1302 to achieve the second longitudinal dispersion process of the hydrogen gas, then the scattering second flow guide strips 1302 disperse the hydrogen gas again and provide the hydrogen gas to the array of flow distribution convex columns 1322 to achieve the third longitudinal dispersion process of the hydrogen gas, after the third longitudinal dispersion, the hydrogen gas can be uniformly dispersed to the flow distribution convex columns 1322, and then the hydrogen gas is uniformly distributed to the hydrogen gas flow channels 11 through the array of flow distribution convex columns 1322, so that the dispersion uniformity of the hydrogen gas after flowing in is guaranteed.
It is understood that the plurality of flow-guiding strips 1321 may further include more stages of flow-guiding strips arranged along the flow direction of the hydrogen gas, for example, a third flow-guiding strip arranged behind the second flow-guiding strip 1302, so as to realize four longitudinal hydrogen gas dispersing processes, and further improve the uniformity of hydrogen gas dispersion.
In some embodiments of the present application, to further improve the uniformity of the hydrogen dispersion of the flow guiding channels 131 and the flow guiding strips 1321, for example, for an embodiment in which the plurality of flow guiding strips 1321 include a plurality of first flow guiding strips 1301 and a plurality of second flow guiding strips 1302 arranged along the flow direction of the hydrogen, referring to fig. 4, one end of each first flow guiding strip 1301 is located between the outlets of the adjacent flow guiding channels 131, and the other end extends toward the second flow guiding strips 1302; one end of the second flow guiding strip 1302 is located between the adjacent first flow guiding strips 1301, and the other end of the second flow guiding strip extends towards the flow dividing convex column 1322.
Further, in order to improve the mass transfer capability of the fuel cell bipolar plate and avoid the phenomenon of poor mass transfer capability caused by that hydrogen diffuses to the membrane electrode only by means of concentration difference, in some embodiments of the present application, referring to fig. 5, fig. 5 shows an enlarged schematic view at B in fig. 2, wherein a plurality of hydrogen flow channels 11 are arranged side by side in parallel, and the bottom of each hydrogen flow channel 11 is provided with a plurality of arc-shaped grooves 112 and arc-shaped protrusions 111 arranged at intervals. When the gas passes through the arc-shaped groove 112 and the arc-shaped protrusion 111 at the bottom of the hydrogen flow channel 11, the hydrogen gas has a velocity component parallel to the first side surface 110 and a velocity component perpendicular to the first side surface 110, and the velocity component perpendicular to the first side surface 110 can improve the mass transfer capacity of the fuel cell bipolar plate, thereby avoiding the phenomenon of poor mass transfer capacity caused by that the hydrogen gas is diffused to the membrane electrode only by concentration difference.
As an example, referring to fig. 4, the arc-shaped groove 112 and the arc-shaped protrusion 111 may be connected to each other, i.e., the hydrogen flow channel 11 including only the groove and the arc-shaped protrusion 111 is formed, so as to increase the density of the protrusion and thus the mass transfer capacity of the fuel cell bipolar plate. It is understood that a flat flow channel bottom surface parallel to the first side surface 110 may be further disposed between the arc-shaped groove 112 and the arc-shaped protrusion 111.
Further, in order to avoid the phenomenon that the distribution of chemical components is not uniform due to the hydrogen gas concentration in the inner part of the hydrogen flow channel 11, in some embodiments of the present application, for example, for an embodiment in which the bottom of the hydrogen flow channel 11 is provided with a plurality of arc-shaped grooves 112 and arc-shaped protrusions 111 arranged at intervals, referring to fig. 6, fig. 6 shows a schematic structural diagram of the hydrogen flow channel 11 in the embodiment of the present application, wherein each hydrogen flow channel 11 has a plurality of serpentine portions 113, and each serpentine portion 113 has at least one arc-shaped groove 112 and/or arc-shaped protrusion 111 therein.
When the hydrogen gas passes through the serpentine portion 113 of the hydrogen flow channel 11, the hydrogen gas changes the gas traveling direction along with the serpentine portion 113, so that the gas flow collides with the side wall surface of the hydrogen flow channel 11, and the hydrogen gas dense area in the hydrogen flow channel 11 is scattered, thereby ensuring the chemical composition distribution uniformity of the bipolar plate body 10. Meanwhile, the arc-shaped grooves 112 and/or the arc-shaped protrusions 111 in each serpentine portion 113 can change the traveling direction of the hydrogen gas not only in the direction parallel to the first side surface 110, but also in the direction perpendicular to the first side surface 110, so as to better bump away the hydrogen gas dense region in the hydrogen gas flow channel 11, thereby ensuring the chemical composition distribution uniformity of the bipolar plate body 10.
It will be appreciated that the serpentine portions 113 may be directly connected to one another to form a continuous serpentine hydrogen gas flow path 11, or adjacent serpentine portions 113 may also be connected by flow paths running parallel to the length of the bipolar plate body 10.
Further, to avoid the phenomenon of uneven distribution of the chemical composition of the bipolar plate caused by the accumulation of hydrogen gas adjacent to the serpentine portions 113, in some embodiments of the present application, for example, having a plurality of serpentine portions 113 for each hydrogen flow channel 11, referring to fig. 6, at least one arcuate raised portion 111 is provided between adjacent serpentine portions 113; or at least one arcuate groove 112 between adjacent serpentine portions 113. When hydrogen gas passes adjacent to the serpentine portions 113, the arc-shaped protrusions 111 or the arc-shaped grooves 112 between the serpentine portions 113 change the flow direction of the hydrogen gas, and collide the hydrogen gas dense regions between the adjacent serpentine portions 113, thereby ensuring the chemical composition distribution uniformity of the bipolar plate body 10.
Further, in order to reduce the temperature of the bipolar plate body 10 because the fuel cell will generate a large amount of heat during the reaction, referring to fig. 2 and 7, fig. 7 shows a structural diagram of the second side 120 of the bipolar plate of the fuel cell according to the embodiment of the present application, wherein the second side 120 is provided with a plurality of oxygen flow channels 12. When the fuel cell is in operation, the oxygen flow channels 12 on the second side 120 of the bipolar plate body 10 provide air to one side of the membrane electrode, so that the oxygen in the air and the hydrogen on the other side of the membrane electrode can generate electrochemical reaction, and the air takes away the heat of the bipolar plate body 10, thereby reducing the temperature of the fuel cell and avoiding the phenomenon of over-high temperature of the fuel cell.
For example, referring to fig. 7, the oxygen flow channels 12 may be arranged in parallel side-by-side arrangement to facilitate uniform oxygen distribution across the second side 120 of the bipolar plate body 10. It is understood that the oxygen flow passage 12 may be provided with an arc-shaped groove 112, an arc-shaped protrusion 111, a serpentine 113, and the like, similar to the hydrogen flow passage 11.
In some embodiments of the present application, referring to fig. 2 and 7, the hydrogen gas flow channels 11 and the oxygen gas flow channels 12 may be arranged in a staggered manner, so that the hydrogen gas and the oxygen gas flow in the staggered direction on the first side 110 and the second side 120 of the bipolar plate body 10, and thus the air can better carry away the heat of the bipolar plate body 10, thereby reducing the temperature of the fuel cell. As an example, the hydrogen flow channel 11 extends along the length of the bipolar plate body 10, and the oxygen flow channel 12 extends along the width of the bipolar plate body 10. As another example, the hydrogen flow channels 11 extend along the width of the bipolar plate body 10, and the oxygen flow channels 12 extend along the length of the bipolar plate body 10.
The size and shape of the bipolar plate body 10 are not specifically limited in the present application, and can be adjusted according to actual needs, but for easy understanding, the embodiment of the present application takes the bipolar plate body 10 as a rectangle as an example, and the bipolar plate body 10 has two long sides with longer size and two short sides with shorter size, the direction of the long side is the length direction of the bipolar plate body 10, and the direction of the short side is the width direction of the bipolar plate body 10.
It is to be noted that the above description of the fuel cell bipolar plate is only for the purpose of clearly explaining the verification process of the present application, and those skilled in the art can make equivalent modifications to the above fuel cell bipolar plate under the guidance of the present application, for example, the diversion channel 131 is provided in the dispersion region 132 to further divert the hydrogen; for another example, the meandering portion 113 of the hydrogen flow channel 11 is bent in a vertical "L" shape; for another example, a sealing groove may be disposed on the outer periphery of the first side 110 of the bipolar plate body 10, so as to ensure the sealing performance of the bipolar plate body 10 after assembling to form a stack.
Further, in order to better implement the fuel cell bipolar plate in the embodiments of the present application, a fuel cell is further provided in the embodiments of the present application on the fuel cell bipolar plate, and the fuel cell includes the fuel cell bipolar plate according to any one of the embodiments described above. The fuel cell in the embodiment of the present application is provided with the fuel cell bipolar plate of the above embodiment, so that the fuel cell bipolar plate has all the beneficial effects of the above fuel cell bipolar plate, and details are not repeated herein.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.
For each patent, patent application publication, and other material cited in this application, such as articles, books, specifications, publications, documents, and the like, the entire contents of which are hereby incorporated by reference into this application, except for application history documents that are inconsistent with or conflict with the contents of this application, and except for documents that are currently or later become incorporated into this application as though fully set forth in the claims below. It is noted that the descriptions, definitions and/or use of terms in this application shall control if they are inconsistent or contrary to the present disclosure.
The present invention provides a fuel cell bipolar plate and a fuel cell, which are provided by the embodiments of the present invention, and the principles and embodiments of the present invention are explained in detail herein, and the description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A fuel cell bipolar plate, comprising:
a bipolar plate body having opposing first and second sides;
the first side surface is provided with a plurality of hydrogen flow channels and a flow distribution structure for distributing hydrogen for the hydrogen flow channels, and the flow distribution structure comprises a dispersion area and a plurality of flow guide channels;
the flow guide channel is communicated with the dispersion area, and a plurality of flow guide strips and flow distribution convex columns are sequentially arranged in the dispersion area along the flow direction of hydrogen, so that the hydrogen sequentially passes through the flow guide channel, the flow guide strips and the flow distribution convex columns and then enters the hydrogen flow channel after being dispersed.
2. The fuel cell bipolar plate of claim 1, wherein the bipolar plate body further has a hydrogen inlet, one end of the plurality of flow-guiding channels is connected to the hydrogen inlet in a gathering manner, and the other end is connected to the dispersion region in a scattering manner;
one end of each of the drainage strips extends towards the drainage channel in a gathering mode, and the other end of each of the drainage strips extends towards the flow dividing convex column in a scattering mode.
3. The fuel cell bipolar plate of claim 2, wherein one end of the flow-inducing strip is located between the outlets of the adjacent flow-inducing channels, and the other end is disposed to extend toward the flow-dividing projection.
4. The fuel cell bipolar plate of claim 1, wherein the plurality of flow-inducing strips includes a plurality of first flow-inducing strips and a plurality of second flow-inducing strips arranged in a flow direction of the hydrogen gas;
one end of each of the first drainage strips extends towards the drainage channel in a gathering state, and the other end of each of the first drainage strips extends towards the second drainage strip in a scattering state;
one end of each of the second drainage strips extends towards the first drainage strip in a gathering mode, and the other end of each of the second drainage strips extends towards the flow dividing convex column in a scattering mode.
5. The fuel cell bipolar plate of claim 4, wherein the first flow-directing strip has one end positioned between the outlets of the adjacent flow-directing channels and the other end extending toward the second flow-directing strip;
one end of the second drainage strip is located between the adjacent first drainage strips, and the other end of the second drainage strip extends towards the flow dividing convex column.
6. The bipolar plate for a fuel cell according to claim 1, wherein a plurality of the hydrogen flow channels are arranged side by side in parallel, and a bottom of each of the hydrogen flow channels is provided with a plurality of arc-shaped grooves and arc-shaped protrusions arranged at intervals.
7. The fuel cell bipolar plate of claim 6, wherein each of the hydrogen flow channels has a plurality of meanders, and each of the meanders has at least one of the arcuate grooves and/or the arcuate projections therein.
8. The fuel cell bipolar plate of claim 7, wherein adjacent ones of said meanders have at least one of said arcuate projections therebetween; or
At least one of the arcuate grooves is provided between adjacent ones of the serpentine portions.
9. The fuel cell bipolar plate of claim 1, wherein the second side is provided with a plurality of oxygen flow channels;
the hydrogen flow channel extends along the length direction of the bipolar plate body, and the oxygen flow channel extends along the width direction of the bipolar plate body; or
The hydrogen flow channel extends along the width direction of the bipolar plate body, and the oxygen flow channel extends along the length direction of the bipolar plate body.
10. A fuel cell comprising the fuel cell bipolar plate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121865025.XU CN215418241U (en) | 2021-08-10 | 2021-08-10 | Fuel cell bipolar plate and fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114864985A (en) * | 2022-04-22 | 2022-08-05 | 广东国鸿氢能科技股份有限公司 | Monopolar plate and bipolar plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114864985A (en) * | 2022-04-22 | 2022-08-05 | 广东国鸿氢能科技股份有限公司 | Monopolar plate and bipolar plate |
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