CN113224343A - Split-flow reconfiguration fuel cell bipolar plate - Google Patents
Split-flow reconfiguration fuel cell bipolar plate Download PDFInfo
- Publication number
- CN113224343A CN113224343A CN202110329176.1A CN202110329176A CN113224343A CN 113224343 A CN113224343 A CN 113224343A CN 202110329176 A CN202110329176 A CN 202110329176A CN 113224343 A CN113224343 A CN 113224343A
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- Prior art keywords
- flow
- flow channel
- fuel cell
- split
- bipolar plate
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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
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- 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 a split-flow reconfiguration fuel cell bipolar plate which comprises two metal polar plates which are arranged in a stacking mode, wherein one surface of each metal polar plate is provided with a first flow channel region, the other surface of each metal polar plate is provided with a second flow channel region, the two metal polar plates are relatively overlapped to enable the second flow channel regions to be overlapped to form a cooling liquid flow channel, the first flow channel region comprises a plurality of rows of one-way flow channels which are arranged in parallel, each one-way flow channel comprises a main flow channel and a plurality of auxiliary flow channels, the main flow channel is of a wave broken line structure, one end of each auxiliary flow channel is connected with a bending angle of the main flow channel, and the other end of each auxiliary flow channel is connected with the middle of a bending section of a gas outlet in the bending angle direction. Compared with the prior art, the invention has the advantages of improving the diffusion efficiency of gas, improving the drainage effect and the like.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to a bipolar plate of a shunting reconfiguration fuel cell.
Background
The fuel cell is a power generation device with the characteristics of environmental friendliness, high working efficiency, long service life and the like. Taking a proton exchange membrane fuel cell as an example, fuel gas (hydrogen) enters the inside of the cell from the anode side of the cell, hydrogen atoms become protons after the anode loses electrons, the protons pass through the proton exchange membrane inside the cell to reach the cathode of the cell, meanwhile, the electrons also reach the cathode of the cell via an external circuit, and at the cathode side of the cell, the protons, the electrons and oxygen combine to generate water, thereby generating current.
Fuel gas or oxygen flows through the flow channels of the bipolar plates in the fuel cell, and the gap between the channels and the proton exchange membrane is called a gas diffusion layer. The traditional flow channel is generally in a straight line groove structure, and the gas diffusion efficiency in the flow channel is low; on the other hand, as is clear from the above, accumulated water is generated in the flow channel on the cathode side, and the flow rate of the conventional flow channel structure is small, and the drainage effect is not good.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a bipolar plate for a split-flow reforming type fuel cell, which can improve the diffusion efficiency of gas and improve the drainage effect.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a reposition of redundant personnel reconfiguration fuel cell bipolar plate, includes two metal polar plates that range upon range of setting, and the one side of every metal polar plate is equipped with first runner region, and the another side is equipped with second runner region, and two relative coincidences of metal polar plate make the regional coincidence of second runner form the coolant liquid runner, first runner region includes multirow parallel arrangement's one-way runner, and wherein every one-way runner includes a sprue and many auxiliary flow channels, the sprue is wave broken line structure, and the angle of buckling of sprue is connected to the one end of every auxiliary flow channel, and the other end is connected in the middle of this angle of buckling gas flow export orientation bending section.
Further, the auxiliary flow channel is semicircular or arched.
Further, the bending angle is tangent to the auxiliary flow channel.
Furthermore, the bending angle ranges from 90 degrees to 120 degrees.
Furthermore, the length of each auxiliary flow channel is 4-8 mm.
Furthermore, one end of each metal polar plate is provided with a first gas inlet, a second gas inlet and a cooling liquid inlet, the other end of each metal polar plate is provided with a first gas outlet, a second gas outlet and a cooling liquid outlet, and two ends of the first flow channel area are respectively connected with the first gas inlet and the first gas outlet.
Furthermore, the two ends of each first flow channel area are provided with confluence areas, and the two ends of each one-way flow channel are respectively connected with the first gas inlet or the first gas outlet through the confluence areas.
Furthermore, a flow dividing column is arranged in the flow converging region.
Further, the first gas inlet and the first gas outlet are diagonally arranged.
Compared with the prior art, the invention has the following beneficial effects: the invention designs the flow dividing reconstruction type flow passage consisting of the main flow passage and the plurality of auxiliary flow passages, so that the gas can stably and uniformly flow, and the relatively uniform and stable reaction gas concentration is formed on the upper surface of the whole flow passage, thereby being beneficial to mass transfer and diffusion. Meanwhile, the invention can realize the flow splitting and converging of the gas through the main flow channel and the plurality of auxiliary flows, thereby accelerating the gas flow and being beneficial to the drainage in the flow channel.
Drawings
Fig. 1 is a schematic structural diagram of a metal plate.
Fig. 2 is a schematic structural view of a unidirectional flow channel.
Fig. 3 is a pressure diagram illustrating the operation principle of the flow channel.
Fig. 4 is a vector diagram illustrating the operation principle of the flow channel.
FIG. 5 is a schematic flow line diagram of the flow channel operating principle.
Description of the drawings: 1-a first flow channel area, 11-a one-way flow channel, 11 a-a main flow channel, 11 b-an auxiliary flow channel, 2-a first gas inlet, 3-a second gas inlet, 4-a cooling liquid inlet, 5-a first gas outlet, 6-a second gas outlet, 7-a cooling liquid outlet, 8-a confluence area and 9-a flow dividing column.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The embodiment provides a bipolar plate of a fuel cell with a split-flow reconfiguration structure, which comprises two metal plates which are arranged in a stacking mode. The two metal polar plates have the same structure, a first flow channel area 1 is arranged on the front side, a second flow channel area is arranged on the back side, and the back sides of the two metal polar plates are relatively overlapped to enable the second flow channel area to be overlapped to form a cooling liquid flow channel. As shown in fig. 1, the first flow channel region 1 of one metal plate is an anode flow channel region, and the first flow channel region 1 of the other metal plate is a cathode flow channel region. The upper end of each metal polar plate is provided with a first gas inlet 2, a second gas inlet 3 and a cooling liquid inlet 4, the first gas inlet 2, namely a fuel gas inlet, is positioned at the leftmost end, the second gas inlet 3, namely an air inlet, is positioned at the rightmost end, and the cooling liquid inlet 4 is positioned in the middle. The lower extreme of metal polar plate is equipped with first gas outlet 5, second gas outlet 6 and coolant liquid export 7, and first gas outlet 5 is the fuel gas export and is located the rightmost end, and second gas outlet 6 is the air export and is located the leftmost end, and coolant liquid export 7 is located the centre. And flow converging regions 8 are further arranged at two ends of the first flow channel region 1, and two ends of each one-way flow channel 11 are respectively connected with the first gas inlet 2 or the first gas outlet 5 through the flow converging regions 8. The confluence area 8 is internally provided with a flow dividing column 9 for diffusing and converging gas.
As shown in fig. 2, the first runner region 1 includes a plurality of rows of parallel unidirectional runners 11, wherein each unidirectional runner 11 includes a main runner 11a and a plurality of auxiliary runners 11 b. The confluence region 8 is connected at the two ends of the main flow channel 11a, the main flow channel 11a is of a wave broken line structure, and the bending angle range is generally 90-120 degrees, preferably 120 degrees. The auxiliary flow path 11b may be semicircular or arcuate, and is preferably semicircular. One end of each auxiliary flow passage 11b is connected to the bending angle of the main flow passage 11a, and the other end is connected to the middle of the bending section at the rear end of the bending angle. The length of each auxiliary flow channel is 4-8 mm, and the optimal length is 6 mm. The bending angle can be tangent to the joint of the auxiliary flow channel 11b, so that the stability of gas passing is improved.
The principle of the one-way flow passage 11 in this embodiment is shown in fig. 3, and the pressure changes, i.e., the pressure relationship is P1> P2> P3, when the gas flows in from the left side, first flows through the branch flow and then flows together. In fig. 4 and 5, the turbulence is generated due to the split and merged flows, increasing the pressure drop, generating secondary flows, on the one hand increasing the gas momentum and on the other hand dissipating the energy through the vortex. This facilitates convective diffusive mass transfer of the gas. Due to the nature of the structure, the split and combined flow enables the gas to pass quickly, which facilitates drainage in the flow channel.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. The utility model provides a reposition of redundant personnel reconfiguration fuel cell bipolar plate, includes two metal polar plates that range upon range of setting, and the one side of every metal polar plate is equipped with first runner region (1), and the another side is equipped with the second runner region, and two relative coincidences of metal polar plate make the regional coincidence of second runner form the coolant liquid runner, its characterized in that, first runner region (1) includes one-way runner (11) of multirow parallel arrangement, and wherein every one-way runner (11) include a sprue (11a) and many auxiliary flow way (11b), sprue (11a) are wave broken line structure, and the angle of buckling of sprue (11a) is connected to the one end of every auxiliary flow way (11b), and the other end is connected the centre of this angle of buckling gas flow export direction bending segment.
2. A split-flow reconfigured fuel cell bipolar plate according to claim 1, characterized in that said auxiliary flow channels (11b) are semicircular or arcuate.
3. A split-flow reconfigured fuel cell bipolar plate as claimed in claim 1, wherein said bending angle is tangential to the auxiliary flow channels (11 b).
4. The bipolar plate for a split-flow reconfigured fuel cell as claimed in claim 1, wherein the bending angle is in the range of 90 to 120 degrees.
5. The bipolar plate of a split-flow reconfigured fuel cell as claimed in claim 1, wherein each of the auxiliary flow channels (11b) has a length of 4 to 8 mm.
6. The bipolar plate of a split-flow reconfigured fuel cell as claimed in claim 1, wherein each metal plate has a first gas inlet (2), a second gas inlet (3) and a coolant inlet (4) at one end, a first gas outlet (5), a second gas outlet (6) and a coolant outlet (7) at the other end, and the first flow channel region (1) is connected to the first gas inlet (2) and the first gas outlet (5) at the two ends.
7. A split-flow reconfigured fuel cell bipolar plate according to claim 6, characterized in that a confluence region (8) is provided at each end of the first flow channel region (1), and each one-way flow channel (11) is connected at each end to the first gas inlet (2) or the first gas outlet (5) through the confluence region (8).
8. A split-flow reconfigured fuel cell bipolar plate according to claim 7 characterized in that said confluence region (8) is internally provided with split columns (9).
9. A split-flow reconfigured fuel cell bipolar plate according to claim 6, characterized in that said first gas inlet (2) and first gas outlet (5) are diagonally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329176.1A CN113224343A (en) | 2021-03-27 | 2021-03-27 | Split-flow reconfiguration fuel cell bipolar plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329176.1A CN113224343A (en) | 2021-03-27 | 2021-03-27 | Split-flow reconfiguration fuel cell bipolar plate |
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| Publication Number | Publication Date |
|---|---|
| CN113224343A true CN113224343A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110329176.1A Pending CN113224343A (en) | 2021-03-27 | 2021-03-27 | Split-flow reconfiguration fuel cell bipolar plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735210A (en) * | 2021-10-14 | 2021-12-03 | 恩拓必(临沂)能源发展有限责任公司 | Distillation type seawater desalination system |
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2021
- 2021-03-27 CN CN202110329176.1A patent/CN113224343A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735210A (en) * | 2021-10-14 | 2021-12-03 | 恩拓必(临沂)能源发展有限责任公司 | Distillation type seawater desalination system |
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