CN112002918A - Bipolar plate assembly and fuel cell - Google Patents
Bipolar plate assembly and fuel cell Download PDFInfo
- Publication number
- CN112002918A CN112002918A CN202010851013.5A CN202010851013A CN112002918A CN 112002918 A CN112002918 A CN 112002918A CN 202010851013 A CN202010851013 A CN 202010851013A CN 112002918 A CN112002918 A CN 112002918A
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- gas flow
- flow channel
- water guide
- bipolar plate
- plate assembly
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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
-
- 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
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
-
- 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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- 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 relates to the technical field of fuel cells and discloses a bipolar plate assembly and a fuel cell. This bipolar plate subassembly includes polar plate body, wedge structure and water guide assembly, is provided with the gas flow channel on the polar plate body, and the wedge structure sets up in the gas flow channel, and one side that the gas flow channel bottom was kept away from to the wedge structure is provided with first inclined plane, and first inclined plane inclines upwards to the direction of the export of gas flow channel along the entry of gas flow channel, and the water guide assembly sets up on the wedge structure, and the water guide assembly is used for exporting gas fuel reaction generated water. The bipolar plate assembly provided by the invention can ensure that the longitudinal section area of the gas flow channel at the side close to the outlet of the gas flow channel is smaller than the longitudinal section area of the gas flow channel at the side close to the inlet of the gas flow channel, thereby increasing the flowing speed of gas and ensuring that the concentration of the gas is uniformly distributed in the whole flow field; through setting up the water guide subassembly, can in time discharge the water of gaseous fuel reaction production, avoid influencing gaseous transmission.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a bipolar plate assembly and a fuel cell.
Background
The fuel cell is an energy conversion device, directly converts chemical energy of substances into electric energy, has the characteristics of high conversion efficiency and cleanness and environmental protection, and can continuously output the electric energy as long as fuel is provided as an electric power supply device. The bipolar plate is used as a core component of the fuel cell, and mainly has the functions of realizing the transmission and distribution of reaction substances, supporting a membrane electrode assembly, collecting current, and guiding water generated by the fuel reaction and generated heat out of a fuel cell stack. Therefore, the structure of the bipolar plate plays an important role in the performance of the fuel cell.
Straight runner or snakelike runner have usually been seted up on current bipolar plate, the cross-section of this type of runner is the rectangle structure, adopt this kind of structure, gas is great at the concentration of runner entrance, along with gaseous continuous reaction, along gaseous flow direction, the gas concentration in the runner constantly descends, gaseous distribution in whole runner is extremely inhomogeneous, gaseous fuel reaction water generation is difficult to the discharge pile simultaneously, gather in the runner easily, block up the runner, cause gas transmission to be obstructed, there is great influence to fuel cell's performance.
Disclosure of Invention
Based on the above, the present invention provides a bipolar plate assembly and a fuel cell, which can improve the uniformity of gas distribution in a flow channel, discharge water produced by gas fuel in time, and ensure the performance of the fuel cell.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bipolar plate assembly comprising:
the gas flow channel is arranged on the polar plate body;
the wedge-shaped structure is arranged in the gas flow channel, a first inclined plane is arranged on one side, away from the bottom of the gas flow channel, of the wedge-shaped structure, and the first inclined plane inclines upwards along the direction from the inlet of the gas flow channel (11) to the outlet of the gas flow channel;
the water guide assembly is arranged on the wedge-shaped structure and used for guiding out water generated by the reaction of the gas fuel.
As a preferable scheme of the bipolar plate assembly, a second inclined plane which forms an included angle with the first inclined plane is further arranged on the wedge-shaped structure, the second inclined plane is inclined inwards along the direction from the bottom of the gas flow channel to the top of the gas flow channel, and the water guide assembly is arranged on the second inclined plane.
As a preferable proposal of the bipolar plate assembly, the included angle between the second inclined plane and the inner side wall of the gas flow channel is 0-80 degrees.
As a preferable scheme of the bipolar plate assembly, the number of the water guide assemblies is multiple, and the multiple groups of the water guide assemblies are arranged at intervals along the flowing direction of the gas.
As a preferable scheme of the bipolar plate assembly, each water guide assembly comprises a plurality of water guide grooves, the width of each water guide groove is 1mm-3mm, and the interval between every two adjacent water guide grooves is 0.5mm-1.5 mm.
As a preferred aspect of the bipolar plate assembly, the distance H between the first slope and the bottom of the gas flow channel and the depth H of the gas flow channel have the relationship: h is more than 0 and less than or equal to 0.5H.
As a preferable scheme of the bipolar plate assembly, the polar plate body and the wedge-shaped structure are of an integrally formed structure.
As a preferable scheme of the bipolar plate assembly, the plate body is made of a metal material or a graphite material.
As a preferable scheme of the bipolar plate assembly, the number of the gas flow channels on the plate body is multiple, and the wedge-shaped structure is arranged in each gas flow channel.
To achieve the above object, the present invention also provides a fuel cell including the bipolar plate assembly according to any one of the above aspects.
The invention has the beneficial effects that:
the invention provides a bipolar plate assembly, which comprises a polar plate body and a wedge-shaped structure, wherein a gas flow channel is arranged on the polar plate body and can be used for gas fuel to pass through so as to enable a fuel cell to output electric energy; through setting up the water guide subassembly, can in time discharge the water of gaseous fuel reaction production, avoid water to dwell for a long time in gas flow path inside, influence gaseous transmission.
The invention also provides a fuel cell, which comprises the bipolar plate assembly, wherein the wedge-shaped structure is arranged in the gas flow channel of the polar plate body, so that the concentration of the gas fuel is uniformly distributed in the whole flow field, and the performance of the fuel cell is better.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and 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 contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a first longitudinal cross-sectional view of a bipolar plate assembly provided by an embodiment of the present invention;
FIG. 2 is a first schematic illustration of a gas flow passage and wedge configuration of a bipolar plate assembly provided in accordance with an embodiment of the present invention;
FIG. 3 is a second longitudinal cross-sectional view of a bipolar plate assembly provided in accordance with an embodiment of the present invention;
fig. 4 is a second structural schematic diagram of a gas flow passage and a wedge structure of a bipolar plate assembly provided by an embodiment of the present invention.
In the figure:
1-a pole plate body; 11-a gas flow channel;
2-a wedge-shaped structure; 21-a first bevel; 22-a second bevel;
3-water guide assembly.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1-2, the present embodiment provides a bipolar plate assembly, which includes a plate body 1, a wedge-shaped structure 2 and a water guide assembly 3, wherein the plate body 1 is provided with a gas flow channel 11, the wedge-shaped structure 2 is disposed in the gas flow channel 11, one side of the wedge-shaped structure 2, which is away from the bottom of the gas flow channel 11, is provided with a first inclined surface 21, the first inclined surface 21 inclines upward along a direction from an inlet of the gas flow channel 11 to an outlet of the gas flow channel 11, the water guide assembly 3 is disposed on the wedge-shaped structure 2, and the water guide assembly 3 is used for guiding out water generated by a gas fuel reaction. Note that the direction of transport of the gaseous fuel is the direction a shown in fig. 1.
In the bipolar plate assembly provided by the embodiment, the gas flow channel 11 is arranged on the plate body 1, and the bipolar plate assembly can be used for gas fuel to pass through so that the fuel cell outputs electric energy, the wedge-shaped structure 2 is arranged in the gas flow channel 11, and the side, away from the bottom of the gas flow channel 11, of the wedge-shaped structure 2 is provided with the first inclined surface 21, and the first inclined surface 21 is inclined upwards along the direction from the inlet of the gas flow channel 11 to the outlet of the gas flow channel 11, so that the longitudinal section area of the gas flow channel 11 on the side close to the outlet of the gas flow channel 11 is smaller than the longitudinal section area of the gas flow channel 11 on the side close to the inlet of the gas flow channel 11, the interference on the flow of the gas fuel is strengthened, the flow speed of the gas is increased; through setting up water guide assembly 3, can in time discharge the water of gaseous fuel reaction production, avoid water to stay for a long time in gas flow channel 11 inside, influence gaseous transmission.
Further, a second inclined plane 22 which forms an included angle with the first inclined plane 21 is further arranged on the wedge-shaped structure 2, the second inclined plane 22 is inclined inwards along the direction from the bottom of the gas flow channel 11 to the top of the gas flow channel 11, and the water guide assembly 3 is arranged on the second inclined plane 22. The water guide assembly 3 can guide water produced by gas fuel reaction out of the first inclined plane 21 along the width direction of the second inclined plane 22, and by adopting the arrangement mode, the water guide assembly 3 is arranged on the second inclined plane 22, so that the water produced by gas fuel reaction can flow out in time along the direction of the water guide assembly 3 under the action of self gravity, the local long-time residence of the water in the gas flow channel 11 is reduced, and the smoothness of gas transmission is ensured.
Furthermore, the number of the water guide assemblies 3 is multiple, and the multiple groups of water guide assemblies 3 are arranged at intervals along the flowing direction of the gas. Because along with gaseous transmission, there is water constantly to generate, through a plurality of water guide assembly 3 that set up along the flowing direction interval of gas, can guarantee gaseous fuel and react the discharge that water that generates can be timely in the transmission course.
Further, as shown in fig. 1, each water guide assembly 3 includes a plurality of water guide grooves, each water guide groove has a width of 1mm to 3mm, and the interval between two adjacent water guide grooves is 0.5mm to 1.5mm, so that the water drainage effect is good. In this embodiment, each set of water guide assembly 3 includes three water guide grooves, the width of each water guide groove is 2mm, and the interval between two adjacent water guide grooves is 0.5 mm. Of course, in other embodiments, the number and arrangement of the water chutes of each water guide assembly 3 may be adjusted according to actual conditions, so as to achieve a better discharge effect of the water generated by the gas fuel reaction.
Further, the cross-sectional shape of the water chute may be a straight strip structure, or may be other curved structures, which is not limited in this application. Preferably, the upper end and the lower end of the water guide groove are in a horn shape, and in this way, more water generated by the reaction of the gas fuel can be received.
Further, the relationship between the distance H between the first slope 21 and the bottom of the gas flow channel 11 and the depth H of the gas flow channel 11 is: h is more than 0 and less than or equal to 0.5H, and the distances H between the first inclined surface 21 and the bottom of the gas flow passage 11 are sequentially increased along the transmission direction of the gas fuel. The angle between the second inclined surface 22 and the inner side wall of the gas flow channel 11 is 0 to 80 °, for example: the angle between the second inclined surface 22 and the inner sidewall of the gas flow channel 11 may be 30 °, 45 °, 59 °, or 75 °. As shown in fig. 1-2, when the included angle between the second inclined surface 22 and the inner sidewall of the gas flow channel 11 is 45 °, the relationship between the cross-sectional area S1 of the outlet of the gas flow channel 11 and the cross-sectional area S2 of the inlet of the gas flow channel 11 is: s1 ═ 37.5% S2; as shown in fig. 3 to 4, when the angle between the second inclined surface 22 and the inner sidewall of the gas flow channel 11 is 80 °, the relationship between the cross-sectional area S1 of the outlet of the gas flow channel 11 and the cross-sectional area S2 of the inlet of the gas flow channel 11 is: s1-25% S2. In the bipolar plate assembly in this embodiment, the longitudinal cross-sectional area of the gas flow channel 11 is sequentially increased along the transmission direction of the gas fuel, so that the gas fuel obtains a certain back pressure at the outlet of the gas flow channel 11, the permeability of the gas fuel to the fuel cell reaction membrane electrode at the downstream of the gas flow channel 11 is increased, the influence on the pressure drop of exhaust gas is small, the gas flow rate is improved, and the uniformity of the mass transmission of the gas fuel in the gas flow channel 11 is improved.
Further, the pole plate body 1 and the wedge-shaped structure 2 are of an integrally formed structure, and the first inclined surface 21, the second inclined surface 22 and the water guide assembly 3 are machined and formed through machining modes such as mechanical carving or punch forming, so that the machining is simple and convenient, the assembling time of a plurality of parts can be saved, and the production efficiency is improved. Preferably, the pole plate body 1 is made of a metal material or a graphite material, wherein the pole plate body 1 may be a hard graphite plate or a flexible graphite plate, or may be a metal sheet.
Further, as shown in fig. 1 and 3, the number of the gas flow channels 11 on the plate body 1 is multiple, and a wedge-shaped structure 2 is arranged in each gas flow channel 11, so that the transmission of the gas fuel is ensured, and the efficiency of the fuel cell is improved.
The embodiment also provides a fuel cell, which comprises the bipolar plate assembly, wherein the wedge-shaped structure 2 is arranged in the gas flow channel 11 of the polar plate body 1, so that the concentration of gas fuel is uniformly distributed in the whole flow field, the performance of the fuel cell is better, the efficiency is higher, and the service life is longer.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A bipolar plate assembly, comprising:
the electrode plate comprises an electrode plate body (1), wherein a gas flow channel (11) is arranged on the electrode plate body (1);
the wedge-shaped structure (2) is arranged in the gas flow channel (11), a first inclined plane (21) is arranged on one side, away from the bottom of the gas flow channel (11), of the wedge-shaped structure (2), and the first inclined plane (21) inclines upwards along the direction from the inlet of the gas flow channel (11) to the outlet of the gas flow channel (11);
the water guide assembly (3) is arranged on the wedge-shaped structure (2), and the water guide assembly (3) is used for guiding out water generated by a gas fuel reaction.
2. A bipolar plate assembly as claimed in claim 1, wherein the wedge-shaped structure (2) is further provided with a second inclined surface (22) arranged at an angle to the first inclined surface (21), the second inclined surface (22) is inclined inward along the bottom of the gas flow channel (11) toward the top of the gas flow channel (11), and the water guide member (3) is arranged on the second inclined surface (22).
3. A bipolar plate assembly as claimed in claim 2, wherein the angle between the second chamfer (22) and the inner side wall of the gas flow channel (11) is 0-80 °.
4. The bipolar plate assembly according to claim 1, wherein the number of the water guide assemblies (3) is multiple groups, and the multiple groups of the water guide assemblies (3) are arranged at intervals along the flowing direction of the gas.
5. The bipolar plate assembly according to claim 4, wherein each water guide assembly (3) comprises a plurality of water guide grooves, the width of each water guide groove is 1mm-3mm, and the interval between every two adjacent water guide grooves is 0.5mm-1.5 mm.
6. A bipolar plate assembly as claimed in claim 1, wherein the distance H between the first chamfer (21) and the bottom of the gas flow channel (11) and the depth H of the gas flow channel (11) are in relation to each other: h is more than 0 and less than or equal to 0.5H.
7. A bipolar plate assembly according to claim 1, wherein the plate body (1) and the wedge-shaped structure (2) are of one-piece construction.
8. A bipolar plate assembly according to claim 1, wherein the plate body (1) is made of a metallic material or a graphite material.
9. A bipolar plate assembly according to any one of claims 1 to 8, wherein the number of the gas flow channels (11) on the plate body (1) is plural, and the wedge-shaped structure (2) is provided in each of the gas flow channels (11).
10. A fuel cell comprising the bipolar plate assembly of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010851013.5A CN112002918B (en) | 2020-08-21 | 2020-08-21 | Bipolar plate assembly and fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010851013.5A CN112002918B (en) | 2020-08-21 | 2020-08-21 | Bipolar plate assembly and fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112002918A true CN112002918A (en) | 2020-11-27 |
| CN112002918B CN112002918B (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010851013.5A Active CN112002918B (en) | 2020-08-21 | 2020-08-21 | Bipolar plate assembly and fuel cell |
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| Country | Link |
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| CN (1) | CN112002918B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270607A (en) * | 2021-05-19 | 2021-08-17 | 大连海事大学 | Bipolar plate assembly for hydrogen-oxygen fuel cell |
| CN114277395A (en) * | 2021-11-30 | 2022-04-05 | 中国华能集团清洁能源技术研究院有限公司 | Novel electrode unit with guide wedge-shaped structure, electrolytic unit and application |
| CN114843544A (en) * | 2022-05-23 | 2022-08-02 | 一汽解放汽车有限公司 | Fuel cell polar plate flow field structure and fuel cell polar plate |
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| CN109686995A (en) * | 2018-12-22 | 2019-04-26 | 一汽解放汽车有限公司 | A kind of interior bipolar plates with wedge-shaped protrusion of runner |
| CN109802155A (en) * | 2018-12-22 | 2019-05-24 | 一汽解放汽车有限公司 | A kind of bipolar plates and processing method advantageously reducing the loss of fuel cell concentration difference |
| CN110739466A (en) * | 2019-09-03 | 2020-01-31 | 西安交通大学 | Bipolar plate of fuel cell and fuel cell |
| CN111244497A (en) * | 2018-11-29 | 2020-06-05 | 中国科学院大连化学物理研究所 | Three-dimensional flow field structure of fuel cell |
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| DE102004039779A1 (en) * | 2003-08-14 | 2005-05-25 | Behr Gmbh & Co. Kg | Bipolar plate, especially for fuel cell for motor vehicle, has first inflow and outflow openings arranged in non diametrically opposing edge regions of bipolar plate, especially adjacent to each other |
| KR100767924B1 (en) * | 2006-11-15 | 2007-10-17 | 지에스칼텍스 주식회사 | Fuel cell stack |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113270607A (en) * | 2021-05-19 | 2021-08-17 | 大连海事大学 | Bipolar plate assembly for hydrogen-oxygen fuel cell |
| CN114277395A (en) * | 2021-11-30 | 2022-04-05 | 中国华能集团清洁能源技术研究院有限公司 | Novel electrode unit with guide wedge-shaped structure, electrolytic unit and application |
| CN114277395B (en) * | 2021-11-30 | 2023-10-03 | 中国华能集团清洁能源技术研究院有限公司 | Novel electrode unit with guiding wedge-shaped structure, electrolysis unit and application |
| CN114843544A (en) * | 2022-05-23 | 2022-08-02 | 一汽解放汽车有限公司 | Fuel cell polar plate flow field structure and fuel cell polar plate |
| CN114843544B (en) * | 2022-05-23 | 2024-05-14 | 一汽解放汽车有限公司 | Fuel cell polar plate flow field structure and fuel cell polar plate |
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|---|---|
| CN112002918B (en) | 2022-02-18 |
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