CN2796119Y - Combined flow guide dipolar plate suitable for constant voltage or low voltage fuel cell - Google Patents
Combined flow guide dipolar plate suitable for constant voltage or low voltage fuel cell Download PDFInfo
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- CN2796119Y CN2796119Y CNU2005200417016U CN200520041701U CN2796119Y CN 2796119 Y CN2796119 Y CN 2796119Y CN U2005200417016 U CNU2005200417016 U CN U2005200417016U CN 200520041701 U CN200520041701 U CN 200520041701U CN 2796119 Y CN2796119 Y CN 2796119Y
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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 utility model relates to a combined type flow-guiding dipolar plate suitable for constant voltage or low voltage fuel cells, which is a rectangular flow-guiding bipolar plate that is combined by a hydrogen flow-guiding plate, an air flow-guiding plate and cooling fluid plate in inverse arrangement. The flow-guiding bipolar plate comprises an air intake main flow hole, an outtake main flow hole, a hydrogen intake main flow hole, a hydrogen outtake main flow hole, a cooling fluid inlet main flow hole and a cooling fluid outlet main flow hole, wherein fluid inlet and outlet main flow holes are arranged at both ends of the rectangular flow-guiding bipolar plate, a plurality of air flow grooves are arranged between an air intake and an outtake main flow holes of the air-flow guiding plate, a plurality of cooling fluid flow grooves are arranged between a cooling fluid inlet and outlet main flow holes of the cooling fluid plate, and a plurality of hydrogen flow grooves are arranged between a hydrogen intake and outtake main flow holes of the hydrogen flow-guiding plate. The utility model has the advantages of less water-blocking occurrence of the flow-guiding grooves, stable operation, etc.
Description
Technical Field
The utility model relates to a fuel cell especially relates to the style of combination formula water conservancy diversion bipolar plate who is fit for ordinary pressure or low pressure fuel cell.
Background
An electrochemical fuel cell is a device that is capable of converting hydrogen fuel and an oxidant into electrical energy and reaction products. The inner core component of the device is a Membrane Electrode (MEA), which is composed of a proton exchange Membrane and two porous conductive materials sandwiched between two surfaces of the Membrane, such as carbon paper. The membrane contains a uniform and finely dispersed catalyst, such as a platinum metal catalyst, for initiating an electrochemical reaction at the interface between the membrane and the carbon paper. The electrons generated in the electrochemical reaction process can be led out by conductive objects at two sides of the membrane electrode through an external circuit to form a current loop.
At the anode end of the membrane electrode, fuel can permeate through a porous diffusion material (carbon paper) and undergo electrochemical reaction on the surface of a catalyst to lose electrons to form positive ions, and the positive ions can pass through a proton exchange membrane through migration to reach the cathode end at the other end of the membrane electrode. At the cathode end of the membrane electrode, a gas containing an oxidant (e.g., oxygen), such as air, forms negative ions by permeating through a porous diffusion material (carbon paper) and electrochemically reacting on the surface of the catalyst to give electrons. The anions formed at the cathode end react with the positive ions transferred from the anode end to form reaction products.
In a pem fuel cell using hydrogen as the fuel and oxygen-containing air as the oxidant (or pure oxygen as the oxidant), the catalytic electrochemical reaction of the fuel hydrogen in the anode region produces hydrogen cations (or protons). The proton exchange membrane assists the migration of positive hydrogen ions from the anode region to the cathode region. In addition, the proton exchange membrane separates the hydrogen-containing fuel gas stream from the oxygen-containing gas stream so that they do not mix with each other to cause explosive reactions.
In the cathode region, oxygen gains electrons on the catalyst surface, forming negative ions, which react with the hydrogen positive ions transported from the anode region to produce water as a reaction product. In proton exchange membrane fuel cells using hydrogen, air (oxygen), the anode reaction and the cathode reaction can be expressed by the following equations:
and (3) anode reaction:
and (3) cathode reaction:
in a typical pem fuel cell, a Membrane Electrode (MEA) is generally placed between two conductive plates, and the surface of each guiding plate in contact with the MEA is die-cast, stamped, or mechanically milled to form at least one or more guiding grooves. The guide electrode plates can be plates made of metal materials or plates made of graphite materials. The diversion pore canals and the diversion grooves on the diversion electrode plates respectively guide the fuel and the oxidant into the anode area and the cathode area on two sides of the membrane electrode. In the structure of a single proton exchange membrane fuel cell, only one membrane electrode is arranged, and a flow guide polar plate of anode fuel and a flow guide polar plate of cathode oxidant are respectively arranged on two sides of the membrane electrode. The flow guide polar plates are used as a current flow collection mother plate and mechanical supports at two sides of the membrane electrode, and flow guide grooves on the flow guide polar plates are also used as channels for fuel and oxidant to enter the surfaces of the anode and the cathode and as channels for taking away water generated in the operation process of the fuel cell.
In order to increase the total power of the whole proton exchange membrane fuel cell, two or more single cells can be connected in series to form a battery pack in a straight-stacked manner or connected in a flat-laid manner to form a battery pack. In the direct-stacking and serial-type battery pack, two surfaces of one polar plate can be provided with flow guide grooves, wherein one surface can be used as an anode flow guide surface of one membrane electrode, and the other surface can be used as a cathode flow guide surface of another adjacent membrane electrode, and the polar plate is called a bipolar plate. A series of cells are connected together in a manner to form a battery pack. The battery pack is generally fastened together into one body by a front end plate, a rear end plate and a tie rod.
A typical battery pack generally includes: (1) the fuel (such as hydrogen, methanol or hydrogen-rich gas obtained by reforming methanol, natural gas and gasoline) and the oxidant (mainly oxygen or air) are uniformly distributed in the diversion trenches of the anode surface and the cathode surface; (2) cooling fluid (such as water) is uniformly distributed into cooling channels in each battery pack through an inlet and an outlet of the cooling fluid and a flow guide channel, and heat generated by electrochemical exothermic reaction of hydrogen and oxygen in the fuel cell is absorbed and taken out of the battery pack for heat dissipation; (3) the outlets of the fuel gas and the oxidant gas and the corresponding flow guide channels can carry out liquid and vapor water generated in the fuel cell when the fuel gas and the oxidant gas are discharged. Typically, all fuel, oxidant, and cooling fluid inlets and outlets are provided in one or both end plates of the fuel cell stack.
The proton exchange membrane fuel cell can be used as a power system of all vehicles, ships and other vehicles, and can also be used as a portable, movable and fixed power generation device. The pem fuel cell power generation system must include fuel cell stack, hydrogen supply, air supply, cooling, automatic control, and power output. The stability and reliability of operation of pem fuel cells are very important for applications as vehicle, marine power systems or mobile power plants. Wherein improving the operational stability and reliability of the fuel cell stack is critical.
At present, in the design of a flow guide bipolar plate of a proton exchange membrane fuel cell stack, in order to reduce air and hydrogen resistance, the sizes of single cross sections of air and hydrogen flow grooves are generally larger, and the number of the air and hydrogen flow grooves is less; in addition, in order to increase the rapid diffusion of oxidant air and fuel hydrogen to the electrode reaction region, the air flow channels on the air and hydrogen flow guide plates are often designed into serpentine or bent shapes, so that the fluid can pass through the channels to form turbulent flow, which is favorable for diffusion to the electrode internal reaction region, as shown in fig. 1.
The design of the flow field of the air and hydrogen flow guide polar plate in the fuel cell stack has the following technical defects:
since the number of the air and hydrogen flow channels is small and the flexibility is large, and the length of the air and hydrogen flow channels is long, the product water produced by the fuel cell is easy to appear on the cathode side of the electrode to block the air flow channels, and the product water produced by the fuel cell is easy to appear on the anode side of the electrode by reverse osmosis to block the hydrogen flow channels. Especially when the fuel cell is used as a vehicle or ship power system or a movable power generation device, the working condition of the power system is greatly changed, the output power of the fuel cell is also greatly changed, and thus the air and hydrogen flow channels are easily blocked by water generated by the fuel cell.
In addition, in order to prevent the water generated by the fuel cell from blocking the diversion trench, the air-hydrogen metering ratio of the operation of the fuel cell is often increased, that is, the air and hydrogen flow rates are increased, and the product water is taken out of the fuel cell by using excessive air and hydrogen.
And thirdly, when the air flow groove or the hydrogen flow groove of the guide plate of the fuel cell is blocked in operation, the voltage of a certain blocked cell is very low or even has a negative value, so that the operation of the fuel cell is unstable, and the electrode is punctured in serious conditions, so that the whole cell stack is damaged.
Disclosure of Invention
The purpose of the utility model is to provide a combined type flow guide bipolar plate which is suitable for normal pressure or low pressure fuel cell and has the advantages of difficult blockage of the flow guide groove and stable operation in order to overcome the defects of the prior art.
The purpose of the utility model can be realized through the following technical scheme: the combined type flow guide bipolar plate suitable for the normal pressure or low pressure fuel cell is characterized in that the flow guide bipolar plate is a rectangular flow guide bipolar plate which is formed by combining an air guide plate and a cooling fluid plate in a back-to-back manner and a hydrogen guide plate into a whole, the flow guide bipolar plate comprises an air inlet main flow hole, an air outlet main flow hole, a hydrogen inlet main flow hole, a hydrogen outlet main flow hole, a cooling fluid inlet main flow hole and a cooling fluid outlet main flow hole, the fluid inlet main flow hole and the fluid outlet main flow hole are arranged at two ends of the rectangular flow guide bipolar plate, a plurality of air flow grooves are arranged between the air inlet main flow hole and the air outlet main flow hole of the air guide plate, a plurality of cooling fluid flow grooves are arranged between the cooling fluid inlet main flow hole and the cooling fluid outlet main flow hole of the cooling fluid plate.
The combination body of the flow guide bipolar plate is as follows: the air guide plate and the cooling fluid plate are opposite and glued together with the single hydrogen guide plate by using a bonding material to form a guide bipolar plate, the front side of the guide bipolar plate is an air guide flow field, the back side of the guide bipolar plate is a hydrogen guide flow field, and the middle interlayer is a cooling fluid guide field.
Sealing grooves are arranged among the fluid main flow holes, between the fluid main flow holes and the air and hydrogen flow grooves or the cooling fluid flow grooves, and on the peripheries of the air and hydrogen guide plates or the cooling fluid plates.
The air or hydrogen flow grooves are divided by the air or hydrogen inlet main flow holes, distributed in an arc shape on the whole and converged by the air or hydrogen outlet main flow holes.
The air and hydrogen flow grooves and the air inlet and hydrogen inlet main flow holes are provided with metal bridge seals at the connecting parts of the air outlet and hydrogen outlet main flow holes, and the air and hydrogen can pass through the lower surfaces of the metal bridge seals.
The air and hydrogen flow grooves which are separated from the air and hydrogen inlet main flow holes are subdivided into at least two parts after passing through a section of straight flow field, and are combined into at least two parts after passing through the whole arched flow field to form a plurality of air and hydrogen flow grooves again, and the plurality of air and hydrogen flow grooves are converged at the air and hydrogen outlet main flow holes after passing through a section of straight flow field.
After the plurality of cooling fluid flow grooves divided from the cooling fluid inlet main flow holes pass through a section of straight flow field, one half of the cooling fluid flow grooves turn 90 degrees and are subdivided into at least two parts, the other half of the cooling fluid flow grooves turn 90 degrees in the opposite direction and are subdivided into at least two parts, after the two parts of the cooling fluid flow grooves pass through the arched flow field, the two parts of the cooling fluid flow grooves are combined into at least two parts, and a plurality of cooling fluid flow grooves are formed again and are converged to the cooling fluid outlet main flow holes.
And opposite corners of the cooling fluid inner clamping plate are respectively provided with a voltage detection groove.
And the diagonal positions of the air and hydrogen guide plates are respectively provided with a positioning hole.
The groove depth and the groove width of the air, hydrogen and cooling fluid flow grooves are 0.2-1.0 multiplied by 0.2-2 mm, and the number of the grooves is 10-80.
Compared with the prior art, the utility model has the advantages of it is following:
a plurality of main air and hydrogen flow grooves are adopted to connect air and hydrogen inlet main flow holes on an air and hydrogen guide plate with air and hydrogen outlet main flow holes, each air and hydrogen main flow groove is divided into at least two branch air and hydrogen flow grooves after passing through a section of flow field, and the at least two branch air and hydrogen flow grooves are combined into the main air and hydrogen flow grooves after passing through the whole flow field. The overall flow direction of the whole flow field of the air and the hydrogen from the inlet to the outlet is in an arch shape, and the air and the hydrogen are not bent back and forth repeatedly like the prior art shown in the figure 1, so that the flow path is long, and the flow resistance is large; each main runner is divided into at least two branch runners, so that the flow resistance is greatly reduced; air and hydrogen can enter the air and hydrogen flow guide field through the main flow grooves and can also flow out of the air and hydrogen flow guide field through the main flow grooves, and water is not easy to block.
Therefore, by adopting the technology of the utility model, the pressure difference between the air inlet and the hydrogen outlet is very small, which is beneficial to the normal pressure or low pressure operation of the fuel cell.
In addition, the cooling fluid flow guide field also adopts the technology, so that the flow resistance of the cooling fluid is small, the temperature difference between the inlet and the outlet of the cooling fluid is small, and the operating temperature of the fuel cell is uniform.
In addition, after a plurality of main flow channels divided from the hydrogen, air and cooling fluid inlets pass through a section of straight flow field, each main flow channel is subdivided into at least two parts, and after all the subdivided branch flow channels pass through a large part of the flow guide field, the branch flow channels which are at least combined into one part are merged, so that a plurality of main flow channels are formed again and are converged to the outlet main flow hole. The utility model discloses the technique can guarantee that the area in each hydrogen, air, cooling fluid business turn over fluid hole at water conservancy diversion bipolar plate is as little as possible to reduced these fluid holes and occupied whole water conservancy diversion bipolar plate's effective reaction area, thereby increased fuel cell's volume weight ratio power.
Drawings
FIG. 1 is a schematic structural diagram of a conventional flow guide plate;
fig. 2 is a schematic structural view of the front air deflector of the flow-guiding bipolar plate of the present invention;
fig. 3 is a schematic structural view of a front air deflector of another flow-guiding bipolar plate of the present invention;
fig. 4 is a schematic structural view of the intermediate cooling fluid clamping plate of the flow-guiding bipolar plate of the present invention;
fig. 5 is a schematic structural view of areverse hydrogen gas guide plate of the flow guide bipolar plate of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example 1
As shown in fig. 2, 4 and 5, the combined flow-guiding bipolar plate suitable for the normal pressure fuel cell has the size of 150 x 200 x 1.5mm, the flow guide bipolar plate is a rectangular flow guide bipolar plate which is formed by combining an air flow guide plate 1, a cooling fluid plate 2 and a hydrogen flow guide plate 16 into a whole, the flow-guiding bipolar plate comprises an air inlet main flow hole 3, an air outlet main flow hole 4, a hydrogen inlet main flow hole 5, a hydrogen outlet main flow hole 6, a cooling fluid inlet main flow hole 7 and a cooling fluid outlet main flow hole 8, wherein the fluid inlet main flow hole and the fluid outlet main flow hole are arranged at two ends of the rectangular flow-guiding bipolar plate, a plurality of air flow grooves 9 are arranged between the air inlet and outlet main flow holes of the air guide plate 1, a plurality of cooling fluid flow grooves 10 are arranged between the cooling fluid inlet and outlet main flow holes of the cooling fluid plate 2, a plurality of hydrogen flow grooves 17 are arranged between the hydrogen inlet and outlet main flow holes of the hydrogen guide plate 16.
The combination body of the flow guide bipolar plate is as follows: the air guide plate 1 is opposite to the cooling fluid plate 2 and is glued with the single hydrogen guide plate 16 by using a bonding material to form a guide bipolar plate, the front surface of the guide bipolar plate is an air guide flow field, the back surface of the guide bipolar plate is a hydrogenguide flow field, and the middle interlayer is a guide cooling fluid field.
Sealing grooves 11 are arranged between the fluid main flow holes, between the fluid main flow holes and the air and hydrogen flow grooves or cooling fluid flow grooves, and on the periphery of the air and hydrogen guide plates or cooling fluid plates.
The air or hydrogen flow grooves 9 and 17 are divided by air or hydrogen inlet main flow holes, distributed in an arc shape on the whole, and then converged by the air or hydrogen outlet main flow holes.
The connecting part of the air and hydrogen flow grooves and the air inlet and hydrogen inlet main flow holes is provided with a metal bridge seal 12, and the air and hydrogen can pass through the lower part of the metal bridge seal 12.
After the plurality of cooling fluid flow grooves 10 divided from the cooling fluid inlet main flow holes pass through a section of straight flow field, one half of the cooling fluid flow grooves turn 90 degrees and are subdivided into at least two parts (forming branch flow grooves), the other half of the cooling fluid flow grooves turn 90 degrees from the opposite direction and are subdivided into at least two parts, after the two parts of the cooling fluid flow grooves pass through the arched flow field, the two parts of the cooling fluid flow grooves are merged into at least two parts, and a plurality of cooling fluid flow grooves are formed again and are converged to the cooling fluid outlet main flow holes.
And a voltage detection groove 13 is respectively arranged at the opposite corners of the cooling fluid inner clamping plate 2.
And the diagonal positions of the air and hydrogen guide plates are respectively provided with a positioning hole 14.
The number of the air and hydrogen flow groovesis 13, the number of the cooling fluid flow grooves is 0.5 multiplied by 0.8mm, the number of the main flow grooves is 10, and the total number of the branch flow grooves is 20.
Example 2
As shown in fig. 3, 4 and 5, the combined flow-guiding bipolar plate suitable for the normal pressure fuel cell has the size of 150 x 200 x 1.5mm, the flow guide bipolar plate is a rectangular flow guide bipolar plate which is formed by combining an air flow guide plate 1, a cooling fluid plate 2 and a hydrogen flow guide plate 16 into a whole, the flow-guiding bipolar plate comprises an air inlet main flow hole 3, an air outlet main flow hole 4, a hydrogen inlet main flow hole 5, a hydrogen outlet main flow hole 6, a cooling fluid inlet main flow hole 7 and a cooling fluid outlet main flow hole 8, wherein the fluid inlet main flow hole and the fluid outlet main flow hole are arranged at two ends of the rectangular flow-guiding bipolar plate, a plurality of air flow grooves 9 are arranged between the air inlet and outlet main flow holes of the air guide plate 1, a plurality of cooling fluid flow grooves 10 are arranged between the cooling fluid inlet and outlet main flow holes of the cooling fluid plate 2, a plurality of hydrogen flow grooves 17 are arranged between the hydrogen inlet and outlet main flow holes of the hydrogen guide plate 16.
The air and hydrogen flow grooves 9 and 17 separated from the air and hydrogen inlet main flow holes are subdivided into at least two parts (forming branch flow grooves 15 and 18) after passing through a section of straight flow field, are merged into at least two parts after passing through the whole arched flow field to form a plurality of air and hydrogen flow grooves 9 and 17 again, and are converged in the air and hydrogen outlet main flow holes after passing through a section of straight flow field.
The number of the air and hydrogen flow grooves is 13, the total number of the branch grooves is 26, the number of the cooling fluid flow grooves is 0.5 × 0.8mm, the number of the main flow grooves is 10, and the total number of the branch grooves is 20.
The rest of the structure is the same as in example 1.
Example 3
The fuel cell stack of example 1 was a fuel cell air deflector for normal pressure air operation, 150 x 200 x 1.5mm in size, and example 3 was a fuel cell air deflector for low pressure air operation, 150 x 200 x 1.5mm in size, and the design was the same as that of example 1 except that: the air flow groove depth x the groove width is 0.3 x 0.8mm, the number of the main flow grooves and the branch flow grooves is 20, the flow resistance of the air entering from the inlet of the flow guide plate is larger than that of the embodiment 1, so the air operation pressure is about 0.5 atmosphere (relative pressure), and the other cooling fluid flow guide fields and the hydrogen flow guide field have the same structure as the embodiment 1.
Example 4
The fuel cell stack of example 1 is a fuel cell hydrogen guiding plate suitable for normal pressure hydrogen operation, and the size is 150 × 200 × 1.5mm, and example 4 is a fuel cell hydrogen guiding plate suitable for low pressure hydrogen operation, and the size is 150 × 200 × 1.5mm, and the other designs are the same as those of example 1, except that: the depth of the hydrogen flow grooves is multiplied by the width of the grooves, which is 0.2 multiplied by 0.8mm, the number of the main flow grooves is 12, and the number of the branch flow grooves is 24; the flow resistance of hydrogen entering from the inlet of the flow guide plate is larger than that of the embodiment 1, so that the hydrogen operation pressure is about 0.5 atmosphere (relative pressure), and the structures of other cooling fluid flowguide fields and air flow guide fields are the same as those of the embodiment 1.
Claims (10)
1. The combined type flow guide bipolar plate suitable for the normal pressure or low pressure fuel cell is characterized in that the flow guide bipolar plate is a rectangular flow guide bipolar plate which is formed by combining an air guide plate and a cooling fluid plate in a back-to-back manner and a hydrogen guide plate into a whole, the flow guide bipolar plate comprises an air inlet main flow hole, an air outlet main flow hole, a hydrogen inlet main flow hole, a hydrogen outlet main flow hole, a cooling fluid inlet main flow hole and a cooling fluid outlet main flow hole, the fluid inlet main flow hole and the fluid outlet main flow hole are arranged at two ends of the rectangular flow guide bipolar plate, a plurality of air flow grooves are arranged between the air inlet main flow hole and the air outlet main flow hole of the air guide plate, a plurality of cooling fluid flow grooves are arranged between the cooling fluid inlet main flow hole and the cooling fluid outlet main flow hole of the cooling fluid plate.
2. The integrated flow-guiding bipolar plate suitable for an atmospheric or low-pressure fuel cell as claimed in claim 1, wherein the integrated flow-guiding bipolar plate is: the air guide plate and the cooling fluid plate are opposite and glued together with the single hydrogen guide plate by using a bonding material to form a guide bipolar plate, the front side of the guide bipolar plate is an air guide flow field, the back side of the guide bipolar plate is a hydrogen guide flow field, and the middle interlayer is a cooling fluid guide field.
3. The integrated flow-guiding bipolar plate for an atmosphericor low pressure fuel cell as claimed in claim 1, wherein sealing grooves are formed between the fluid mainstream holes, between the fluid mainstream holes and the air, hydrogen flow groove or cooling fluid flow groove, and on the periphery of the air, hydrogen flow guiding plate or cooling fluid plate.
4. The integrated flow directing bipolar plate of claim 1, wherein said plurality of air or hydrogen flow channels are divided by air or hydrogen inlet mainstream holes, distributed in a generally arcuate shape, and then converged by air or hydrogen outlet mainstream holes.
5. The assembled flow-guiding bipolar plate for an atmospheric or low pressure fuel cell as claimed in claim 1, 2 or 4, wherein the air and hydrogen flow grooves are connected with the air inlet main flow hole and the hydrogen inlet main flow hole, and the connection part of the air outlet main flow hole and the hydrogen outlet main flow hole is provided with a metal bridge seal, and air and hydrogen can pass through the metal bridge seal.
6. The bipolar plate of claim 1 or 4, wherein the air and hydrogen flow channels divided from the air and hydrogen inlet main flow holes are subdivided into at least two parts after passing through a straight flow field, and are merged into at least two parts after passing through the entire arcuate flow field to form a plurality of air and hydrogen flow channels, and the air and hydrogen flow channels are converged at the air and hydrogen outlet main flow holes after passing through a straight flow field.
7. The integrated flow-guiding bipolar plate for an atmospheric or low-pressure fuel cell as claimed in claim 1, wherein after the cooling fluid channels divided fromthe main flow holes of the cooling fluid inlet are passed through a straight flow field, one half of the cooling fluid channels are turned 90 degrees and subdivided into at least two segments, the other half of the cooling fluid channels are turned 90 degrees from the opposite direction and subdivided into at least two segments, and after the two segments of the cooling fluid channels are passed through an arcuate flow field, the two segments of the cooling fluid channels are merged into at least two segments to form a plurality of cooling fluid channels which are converged toward the main flow holes of the cooling fluid outlet.
8. The integrated flow-guiding bipolar plate for an atmospheric or low pressure fuel cell as claimed in claim 1 or 7, wherein a voltage detection groove is formed at each of opposite corners of the cooling fluid inner clamping plate.
9. The integrated flow-guiding bipolar plate suitable for an atmospheric or low-pressure fuel cell as claimed in claim 1, wherein a positioning hole is formed at each of the opposite corners of the air and hydrogen gas flow-guiding plate.
10. The assembled flow guide bipolar plate suitable for an atmospheric or low pressure fuel cell as claimed in claim 1, wherein the air, hydrogen and cooling fluid flow grooves have a groove depth x a groove width of 0.2 to 1.0 x 0.2 to 2mm, and the number of grooves is 10 to 80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200417016U CN2796119Y (en) | 2005-05-20 | 2005-05-20 | Combined flow guide dipolar plate suitable for constant voltage or low voltage fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200417016U CN2796119Y (en) | 2005-05-20 | 2005-05-20 | Combined flow guide dipolar plate suitable for constant voltage or low voltage fuel cell |
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| Publication Number | Publication Date |
|---|---|
| CN2796119Y true CN2796119Y (en) | 2006-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200417016U Expired - Fee Related CN2796119Y (en) | 2005-05-20 | 2005-05-20 | Combined flow guide dipolar plate suitable for constant voltage or low voltage fuel cell |
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| CN (1) | CN2796119Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464453C (en) * | 2005-05-20 | 2009-02-25 | 上海神力科技有限公司 | Combined type flow guide polar plate suitable for normal pressure or low pressure fuel cell |
| CN102810676A (en) * | 2011-06-01 | 2012-12-05 | 上海神力科技有限公司 | Fuel cell flow guide electrode plate beneficial to reduction of flow resistance of cooling fluid |
-
2005
- 2005-05-20 CN CNU2005200417016U patent/CN2796119Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464453C (en) * | 2005-05-20 | 2009-02-25 | 上海神力科技有限公司 | Combined type flow guide polar plate suitable for normal pressure or low pressure fuel cell |
| CN102810676A (en) * | 2011-06-01 | 2012-12-05 | 上海神力科技有限公司 | Fuel cell flow guide electrode plate beneficial to reduction of flow resistance of cooling fluid |
| CN102810676B (en) * | 2011-06-01 | 2014-07-30 | 上海神力科技有限公司 | Fuel cell flow guide electrode plate beneficial to reduction of flow resistance of cooling fluid |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 |