CN115347211A - Cooling liquid flow field of fuel cell bipolar plate - Google Patents
Cooling liquid flow field of fuel cell bipolar plate Download PDFInfo
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- CN115347211A CN115347211A CN202211285254.3A CN202211285254A CN115347211A CN 115347211 A CN115347211 A CN 115347211A CN 202211285254 A CN202211285254 A CN 202211285254A CN 115347211 A CN115347211 A CN 115347211A
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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
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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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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Abstract
The invention discloses a cooling liquid flow field of a fuel cell bipolar plate, which comprises a first cooling liquid input port, a second cooling liquid output port, a cooling liquid flow field, a first cooling liquid output port and a second cooling liquid input port, wherein the cooling liquid flow field comprises a first cooling liquid flow field and a second cooling liquid flow field, the left end of the first cooling liquid flow field is connected with the first cooling liquid input port, and the right end of the first cooling liquid flow field is connected with the first cooling liquid output port; the left side of the second cooling liquid flow field is connected with a second cooling liquid output port, and the right side of the second cooling liquid flow field is connected with a second cooling liquid input port. The invention greatly improves the cooling effect by arranging the two cooling liquid flow fields and enabling the cooling liquid to flow oppositely on the cooling liquid flow fields.
Description
Technical Field
The invention relates to the technical field of fuel cell bipolar plates, in particular to a cooling liquid flow field of a fuel cell bipolar plate.
Background
The fuel cell stack is a core technical component of a fuel cell system, and air and hydrogen enter the fuel cell stack to perform electrochemical reaction so as to generate electric energy.
The fuel cell stack is formed by stacking a plurality of bipolar plates, two end faces of each bipolar plate are divided into a cathode face and an anode face, air flows and diffuses on the cathode face, and hydrogen flows and diffuses on the anode face. Because the electrochemical reaction of hydrogen and air can generate heat, and the electrochemical reaction efficiency can be seriously influenced if the bipolar plate is overheated, a cooling liquid flow field needs to be arranged in the bipolar plate, and the cooling liquid flows and diffuses in the cooling liquid flow field in the bipolar plate, so that the heat on the bipolar plate is taken away, and the cooling effect is realized.
The existing cooling liquid flow field technology generally adopts a single cooling liquid flow field, namely only one cooling liquid inlet and one cooling liquid outlet are provided, and cooling liquid enters the cooling liquid flow field from the single cooling liquid inlet and then enters the single cooling liquid flow field from the single cooling liquid outlet.
The prior art has the following defects: a single cooling liquid flow field is adopted, so that the cooling speed is low, and the cooling efficiency is low; in addition, the flow of the cooling liquid on a cooling liquid flow field is not uniform enough, so that the cooling effect is not uniform enough; the specific temperature of the bipolar plate is difficult to control due to the single cooling liquid flow field, and the cooling effect is greatly reduced.
Disclosure of Invention
In order to solve one of the above technical problems, the present invention provides a coolant flow field of a bipolar plate of a fuel cell, wherein two coolant flow fields are arranged, and the coolant flows in opposite directions on the coolant flow fields, so that the cooling effect is greatly improved.
In order to solve the technical problems, the invention provides the following technical scheme: a cooling liquid flow field of a fuel cell bipolar plate comprises a first cooling liquid input port, a second cooling liquid output port, a cooling liquid flow field, a first cooling liquid output port and a second cooling liquid input port, wherein the cooling liquid flow field comprises a first cooling liquid flow field and a second cooling liquid flow field, the left end of the first cooling liquid flow field is connected with the first cooling liquid input port, and the right end of the first cooling liquid flow field is connected with the first cooling liquid output port; the left side of the second cooling liquid flow field is connected with a second cooling liquid output port, and the right side of the second cooling liquid flow field is connected with a second cooling liquid input port;
the first cooling liquid flow field comprises a plurality of cooling liquid flow channels and a plurality of connecting channels, and every two cooling liquid flow channels are connected through the connecting channels; the first cooling liquid flow field is divided into a first cooling liquid flow field upper half flow field and a first cooling liquid flow field lower half flow field; the length of a cooling liquid flow channel of the upper half flow field of the first cooling liquid flow field is greater than that of the lower half flow field of the first cooling liquid flow field;
the first cooling liquid flow field also comprises a first input gap bridge and a first output gap bridge, the first input gap bridge is arranged at the left end of the upper half flow field of the first cooling liquid flow field, the left side of the first input gap bridge is connected with the first cooling liquid input port, and the right side of the first input gap bridge is connected with the plurality of cooling liquid flow channels; the first output gap bridge is arranged at the right end of the lower half flow field of the first cooling liquid flow field, the right side of the first output gap bridge is connected with the first cooling liquid output port, and the left side of the first output gap bridge is connected with a plurality of cooling liquid flow channels;
the second cooling liquid flow field comprises a plurality of cooling liquid flow channels and a plurality of connecting channels, and every two cooling liquid flow channels are connected through the connecting channels; the second cooling liquid flow field is divided into an upper half flow field and a lower half flow field of the second cooling liquid flow field; the length of a cooling liquid flow channel of the upper half flow field of the second cooling liquid flow field is smaller than that of the lower half flow field of the second cooling liquid flow field;
the second cooling liquid flow field also comprises a second output gap bridge and a second input gap bridge, the second output gap bridge is arranged at the left end of the upper half flow field of the second cooling liquid flow field, the left side of the second output gap bridge is connected with the second cooling liquid output port, and the right side of the second output gap bridge is connected with a plurality of cooling liquid flow channels; the second input gap bridge is arranged at the right end of the lower half flow field of the second cooling liquid flow field, the right side of the second input gap bridge is connected with the second cooling liquid input port, and the left side of the second input gap bridge is connected with the plurality of cooling liquid flow channels.
Furthermore, the first cooling liquid flow field further comprises a plurality of first input channels and a plurality of first output channels, the first input gap bridge and the first output gap bridge are both annular channels, the first input channels are arranged in the first input gap bridge, and the first output channels are arranged in the first output gap bridge.
Furthermore, the length of the coolant flow channel of the lower half flow field of the first coolant flow field is equal to one half of the length of the coolant flow channel of the upper half flow field of the first coolant flow field, the connecting channels of the upper half flow field of the first coolant flow field are arranged at the left end, the middle part and the right end of the upper half flow field of the first coolant flow field, and the connecting channels of the lower half flow field of the first coolant flow field are arranged at the left end and the right end of the lower half flow field of the first coolant flow field.
Furthermore, the second cooling liquid flow field further comprises a plurality of second output channels and a plurality of second input channels, the second output gap bridge and the second input gap bridge are both annular channels, the second output channels are arranged in the second output gap bridge, and the second input channels are arranged in the second input gap bridge.
Furthermore, the length of the coolant flow channel of the upper half flow field of the second coolant flow field is equal to one half of the length of the coolant flow channel of the lower half flow field of the second coolant flow field, the linking channels of the lower half flow field of the second coolant flow field are arranged at the left end, the middle part and the right end of the lower half flow field of the second coolant flow field, and the linking channels of the upper half flow field of the second coolant flow field are arranged at the left end and the right end of the upper half flow field of the second coolant flow field.
After the technical scheme is adopted, the invention at least has the following beneficial effects: the cooling efficiency of the fuel cell bipolar plate can be greatly improved by arranging the two sub-flow fields on the cooling liquid flow field and enabling the cooling liquid to flow oppositely, and the first cooling liquid flow field 9 and the second cooling liquid flow field 10 are designed symmetrically, so that the cooling liquid flows more uniformly, the heat of the fuel cell bipolar plate can be taken away uniformly, and the electrochemical reaction on the fuel cell bipolar plate can achieve the optimal effect.
Drawings
FIG. 1 is a schematic diagram of the structure of a coolant flow field according to the present invention.
Fig. 2 is a schematic structural view of a first coolant flow field according to the present invention.
Fig. 3 is a schematic view of a second coolant flow field according to the present invention.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application is further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment discloses a cooling liquid flow field of a fuel cell bipolar plate, which comprises a hydrogen inlet 1, a first cooling liquid inlet 2, a second cooling liquid outlet 3, an air outlet 4, an air inlet 5, a first cooling liquid outlet 6, a second cooling liquid inlet 7 and a hydrogen outlet 8; as shown in fig. 1, the hydrogen gas input port 1, the first coolant input port 2, the second coolant output port 3, and the air output port 4 are located on the left side of the fuel cell bipolar plate, and the air input port 5, the first coolant output port 6, the second coolant input port 7, and the hydrogen gas output port 8 are located on the right side of the fuel cell bipolar plate; the front end face and the rear end face of the fuel cell bipolar plate are respectively an anode face and a cathode face, a hydrogen flow field is arranged on the anode face, an air flow field is arranged on the cathode face, hydrogen enters the hydrogen flow field through a hydrogen input port 1 and then flows out of a hydrogen output port 8, and air enters the air flow field through an air input port 5 and then flows out of an air output port 4; a coolant flow field is arranged between the anode surface and the cathode surface (namely, the coolant flow field is arranged inside the fuel cell bipolar plate), and the coolant flow field is suitable for the coolant to flow on the coolant flow field, so that the heat of the fuel cell bipolar plate is taken away.
As shown in fig. 1, the cooling liquid flow field comprises a first cooling liquid flow field 9 and a second cooling liquid flow field 10, the left end of the first cooling liquid flow field 9 is connected with the first cooling liquid input port 2, and the right end of the first cooling liquid flow field 9 is connected with the first cooling liquid output port 6; the left side of the second cooling liquid flow field 10 is connected with the second cooling liquid output port 3, and the right side of the second cooling liquid flow field 10 is connected with the second cooling liquid input port 7.
As shown in fig. 2, the first cooling liquid flow field 9 includes a plurality of cooling liquid flow channels 93 and a plurality of connecting channels 94, two cooling liquid flow channels 93 are connected by the connecting channels 94, the cooling liquid flow channels 93 are preferably straight flow channels, the connecting channels 94 are perpendicular to the cooling liquid flow channels 93, and the connecting channels 94 allow the cooling liquid of one cooling liquid flow channel 93 to flow into another cooling liquid flow channel 93 connected thereto;
the first coolant flow field 9 is divided into a first coolant flow field upper half 97 and a first coolant flow field lower half 98; the length of the cooling liquid runner 93 of the first cooling liquid flow field upper semi-flow field 97 is greater than the length of the cooling liquid runner 93 of the first cooling liquid flow field lower semi-flow field 98; preferably, the length of the cooling liquid runner 93 of the first cooling liquid flow field lower half-flow field 98 is equal to the length of one half of the cooling liquid runner 93 of the first cooling liquid flow field upper half-flow field 97, the joining channels 94 of the first cooling liquid flow field upper half-flow field 97 are arranged at the left end, the middle part and the right end of the first cooling liquid flow field upper half-flow field 97, and the joining channels 94 of the first cooling liquid flow field lower half-flow field 98 are arranged at the left end and the right end of the first cooling liquid flow field lower half-flow field 98;
the first cooling liquid flow field 9 further comprises a first input bridge 91, a plurality of first input channels 92, a first output bridge 95 and a plurality of first output channels 96, the first input bridge 91 is arranged at the left end of the first cooling liquid flow field upper half flow field 97, the left side of the first input bridge 91 is connected with the first cooling liquid input port 2, the right side of the first input bridge 91 is connected with a plurality of cooling liquid flow channels 93, the first input bridge 91 is an annular channel, and the first input channels 92 are arranged in the first input bridge 91; the first output gap bridge 95 is arranged at the right end of the lower half flow field 98 of the first cooling liquid flow field, the right side of the first output gap bridge 95 is connected with the first cooling liquid output port 6, the left side of the first output gap bridge 95 is connected with the plurality of cooling liquid flow channels 93, the first output gap bridge 95 is an annular channel, and the first output channel 96 is arranged in the first output gap bridge 95.
As shown in fig. 3, the second cooling liquid flow field 10 also includes a plurality of cooling liquid flow channels 93 and a plurality of joining channels 94, that is, the cooling liquid flow channels 93 and the joining channels 94 included in the first cooling liquid flow field 9 and the second cooling liquid flow field 10 are the same, two of the cooling liquid flow channels 93 are connected by the joining channels 94, the cooling liquid flow channels 93 are preferably straight flow channels, and the joining channels 94 are perpendicular to the cooling liquid flow channels 93;
the second coolant flow field 10 is also divided into a second coolant flow field upper half-flow field 105 and a second coolant flow field lower half-flow field 106; the length of the cooling liquid runner 93 of the upper half-flow field 105 of the second cooling liquid flow field is less than that of the cooling liquid runner 93 of the lower half-flow field 106 of the second cooling liquid flow field; preferably, the length of the cooling liquid channel 93 of the upper half-flow field 105 of the second cooling liquid flow field is equal to one half of the length of the cooling liquid channel 93 of the lower half-flow field 106 of the second cooling liquid flow field, the joining channels 94 of the lower half-flow field 106 of the second cooling liquid flow field are arranged at the left end, the middle part and the right end of the lower half-flow field 106 of the second cooling liquid flow field, and the joining channels 94 of the upper half-flow field 105 of the second cooling liquid flow field are arranged at the left end and the right end of the upper half-flow field 105 of the second cooling liquid flow field;
the second cooling liquid flow field 10 further comprises a second output bridge 101, a plurality of second output channels 102, a second input bridge 103 and a plurality of second input channels 104, the second output bridge 101 is arranged at the left end of the upper half flow field 105 of the second cooling liquid flow field, the left side of the second output bridge 101 is connected with the second cooling liquid output port 3, the right side of the second output bridge 101 is connected with the plurality of cooling liquid flow channels 93, the second output bridge 101 is an annular channel, and the second output channels 102 are arranged in the second output bridge 101; the second input bridge 103 is arranged at the right end of the lower half flow field 106 of the second cooling liquid flow field, the right side of the second input bridge 103 is connected with the second cooling liquid input port 7, the left side of the second input bridge 103 is connected with the plurality of cooling liquid flow channels 93, the second input bridge 103 is an annular channel, and the second input channel 104 is arranged in the second input bridge 103.
In one embodiment, coolant enters the coolant flow field from the first coolant inlet 2 and the second coolant inlet 7 of the fuel cell bipolar plate;
the cooling liquid of the first cooling liquid input port 2 is input into the first cooling liquid flow field 9 from the first input gap bridge 91, the cooling liquid flows on the first cooling liquid flow field 9 so as to take away the heat inside the fuel cell bipolar plate, and the cooling liquid carrying the heat is output to the first cooling liquid output port 6 from the first output gap bridge 95; after entering the first input bridge 91, the cooling liquid can flow through the first input channel 92, and the first input channel 92 increases the flow amount of the cooling liquid; similarly, after entering the first output bridge 95, the cooling liquid can flow through the first output channel 96, and the first output channel 96 increases the flow amount of the cooling liquid;
the cooling liquid of the second cooling liquid input port 7 is input into the second cooling liquid flow field 10 from the second input bridge 103, the cooling liquid flows on the second cooling liquid flow field 10 so as to take away the heat inside the fuel cell bipolar plate, and the cooling liquid carrying the heat is output to the second cooling liquid output port 3 from the second output bridge 102; after entering the second input bridge 103, the cooling liquid can flow through the second input channel 104, and the flow quantity of the cooling liquid is increased by the second input channel 104; similarly, after the cooling liquid enters the second output bridge 102, the flow of the cooling liquid can be increased through the second output channel 102 by the second output channel 102.
In the present embodiment, the two sub-flow fields (the first coolant flow field 9 and the second coolant flow field 10) are disposed in the coolant flow field, and the coolant flows in opposite directions (the coolant flows in from the left end of the bipolar plate of the fuel cell in the first coolant flow field 9 and flows out from the right end of the fuel cell, and the coolant flows in from the right end of the bipolar plate of the fuel cell in the second coolant flow field 10 and flows out from the left end of the fuel cell), so that the cooling efficiency of the bipolar plate of the fuel cell can be greatly improved, and the first coolant flow field 9 and the second coolant flow field 10 are designed symmetrically, so that the coolant flows more uniformly, the heat of the bipolar plate of the fuel cell can be uniformly removed, and the electrochemical reaction on the bipolar plate of the fuel cell can be optimally carried out.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. The cooling liquid flow field of the fuel cell bipolar plate is characterized by comprising a first cooling liquid input port, a second cooling liquid output port, a cooling liquid flow field, a first cooling liquid output port and a second cooling liquid input port, wherein the cooling liquid flow field comprises a first cooling liquid flow field and a second cooling liquid flow field, the left end of the first cooling liquid flow field is connected with the first cooling liquid input port, and the right end of the first cooling liquid flow field is connected with the first cooling liquid output port; the left side of the second cooling liquid flow field is connected with a second cooling liquid output port, and the right side of the second cooling liquid flow field is connected with a second cooling liquid input port;
the first cooling liquid flow field comprises a plurality of cooling liquid flow channels and a plurality of connecting channels, and every two cooling liquid flow channels are connected through the connecting channels; the first cooling liquid flow field is divided into a first cooling liquid flow field upper half flow field and a first cooling liquid flow field lower half flow field; the length of a cooling liquid flow channel of the upper half flow field of the first cooling liquid flow field is greater than that of the lower half flow field of the first cooling liquid flow field;
the first cooling liquid flow field also comprises a first input gap bridge and a first output gap bridge, the first input gap bridge is arranged at the left end of the upper half flow field of the first cooling liquid flow field, the left side of the first input gap bridge is connected with the first cooling liquid input port, and the right side of the first input gap bridge is connected with the plurality of cooling liquid flow channels; the first output gap bridge is arranged at the right end of the lower half flow field of the first cooling liquid flow field, the right side of the first output gap bridge is connected with the first cooling liquid output port, and the left side of the first output gap bridge is connected with a plurality of cooling liquid flow channels;
the second cooling liquid flow field comprises a plurality of cooling liquid flow channels and a plurality of connecting channels, and every two cooling liquid flow channels are connected through the connecting channels; the second cooling liquid flow field is divided into an upper half flow field of the second cooling liquid flow field and a lower half flow field of the second cooling liquid flow field; the length of a cooling liquid flow channel of the upper half flow field of the second cooling liquid flow field is smaller than that of the lower half flow field of the second cooling liquid flow field;
the second cooling liquid flow field also comprises a second output gap bridge and a second input gap bridge, the second output gap bridge is arranged at the left end of the upper half flow field of the second cooling liquid flow field, the left side of the second output gap bridge is connected with the second cooling liquid output port, and the right side of the second output gap bridge is connected with a plurality of cooling liquid flow channels; the second input gap bridge is arranged at the right end of the lower half flow field of the second cooling liquid flow field, the right side of the second input gap bridge is connected with the second cooling liquid input port, and the left side of the second input gap bridge is connected with the plurality of cooling liquid flow channels.
2. The fuel cell bipolar plate coolant flow field of claim 1 wherein said first coolant flow field further comprises a plurality of first inlet channels and a plurality of first outlet channels, said first inlet bridge and said first outlet bridge each being an annular channel, said first inlet channels being disposed in said first inlet bridge and said first outlet channels being disposed in said first outlet bridge.
3. The coolant flow field of claim 1, wherein the coolant flow channel length of the lower half flow field of the first coolant flow field is equal to one-half of the coolant flow channel length of the upper half flow field of the first coolant flow field, the connecting channels of the upper half flow field of the first coolant flow field are disposed at the left end, the middle portion and the right end of the upper half flow field of the first coolant flow field, and the connecting channels of the lower half flow field of the first coolant flow field are disposed at the left end and the right end of the lower half flow field of the first coolant flow field.
4. The fuel cell bipolar plate coolant flow field of claim 1 wherein said second coolant flow field further comprises a plurality of second output channels and a plurality of second input channels, said second output bridge and said second input bridge being annular channels, said second output channels being disposed in said second output bridge and said second input channels being disposed in said second input bridge.
5. The coolant flow field of a fuel cell bipolar plate according to claim 1, wherein the coolant flow channel length of the upper half flow field of the second coolant flow field is equal to one-half of the coolant flow channel length of the lower half flow field of the second coolant flow field, the connecting channels of the lower half flow field of the second coolant flow field are disposed at the left end, the middle portion and the right end of the lower half flow field of the second coolant flow field, and the connecting channels of the upper half flow field of the second coolant flow field are disposed at the left end and the right end of the upper half flow field of the second coolant flow field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211285254.3A CN115347211A (en) | 2022-10-20 | 2022-10-20 | Cooling liquid flow field of fuel cell bipolar plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211285254.3A CN115347211A (en) | 2022-10-20 | 2022-10-20 | Cooling liquid flow field of fuel cell bipolar plate |
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Application publication date: 20221115 |