CN108550875A - A kind of flow channels for proton exchange membrane fuel cells - Google Patents
A kind of flow channels for proton exchange membrane fuel cells Download PDFInfo
- Publication number
- CN108550875A CN108550875A CN201810378148.7A CN201810378148A CN108550875A CN 108550875 A CN108550875 A CN 108550875A CN 201810378148 A CN201810378148 A CN 201810378148A CN 108550875 A CN108550875 A CN 108550875A
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- China
- Prior art keywords
- sprue
- flow passage
- branch flow
- flow channels
- exchange membrane
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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
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- 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 present invention provides a kind of flow channels for proton exchange membrane fuel cells, including the cathode flow channels being arranged in bipolar plates, cathode flow channels include the entrance channel with entrance, the outlet flow with outlet and at least one branch flow passage, the entrance of branch flow passage is connected to entrance channel, the outlet of branch flow passage is connected to outlet flow, it is arranged at intervals with sprue at least one branch flow passage so that reduce sectional area of the branch flow passage at sprue.The present invention in gas flow direction by being arranged sprue so that gas flow velocity during by runner increases, and is more easy to be transferred in diffusion layer, is greatly improved gas effciency, battery integral level is made to be improved.
Description
Technical field
The invention belongs to fuel cell fields, and in particular to a kind of flow channels for proton exchange membrane fuel cells.
Background technology
Proton Exchange Membrane Fuel Cells（PEMFC）As a kind of novel energy processing mode, the low, nothing with its operating temperature
Pollution, corrosion-free, specific power is big, starts many advantages, such as rapid, has become the hot spot of energy field research, both at home and abroad in recent years
All increasing the research input to this technology, has obtained some crucial progress.The design of bipolar plate runner and processing pair
PEMFC performances, efficiency and cost all have a great impact.Runner design appropriate can make battery performance improve 50% or so,
To ensure that fuel cell has preferable performance and stability.
Typical Proton Exchange Membrane Fuel Cells straight channel is as shown in Figure 1, the reaction gas in runner is largely at present
Entering electrode by diffusion phenomena, speed is slower, these phenomenons can lead to oxygen wretched insufficiency at the cathode outlet of fuel cell,
To reduce performance and the service life of fuel cell.Therefore, Optimal Structure Designing is carried out by the cathode flow channels to fuel cell, it can
To promote the transmission of oxygen, make fuel cell that there are better mass transfer performances, is an important hand for promoting battery performance and service life
Section.
Invention content
The technical problem to be solved by the present invention is to：A kind of flow channels for proton exchange membrane fuel cells is provided, gas in runner is improved
The utilization rate of body.
The technical solution taken by the invention to solve the above technical problem is：One proton exchanging film fuel battery stream
Road, including the cathode flow channels that are arranged in bipolar plates, cathode flow channels include the entrance channel with entrance, the outlet with outlet
Runner and at least one branch flow passage, the entrance of branch flow passage are connected to entrance channel, the outlet of branch flow passage and outlet stream
Road is connected to, it is characterised in that：It is arranged at intervals with sprue at least one branch flow passage so that reduce branch flow passage at sprue
Sectional area.
By said program, the 60%-80% of the sprue covering branch flow passage sectional area.
By said program, the structure between branch flow passage is bank, and the top of sprue is equal at the top of the bank, sprue
Space for gas to pass through is equipped between bottom and the bottom of branch flow passage, sprue is fixedly connected with bank.
By said program, the sprue is arranged along branch flow passage equidistant interval.
By said program, the width of the branch flow passage is 1mm, and the height of branch flow passage is 0.85mm；Branch flow passage
Between structure be bank, the width of bank is 0.5mm；The width of sprue is 1mm, and the height of sprue is 0.595mm, the length of sprue
For 1mm.
By said program, the distance between adjacent sprue is 2.5mm；Between the sprue nearest from entrance channel and entrance
Distance be 2mm.
By said program, the integral layout of the cathode flow channels is the rectangle of 20mm*21mm.
Beneficial effects of the present invention are：By the way that sprue is arranged in gas flow direction so that gas is passing through runner
Flow velocity increases in the process, is more easy to be transferred in diffusion layer, is greatly improved gas effciency, battery integral level is made to be carried
It is high.
Description of the drawings
Fig. 1 is the schematic diagram for being existing typical flow channels for proton exchange membrane fuel cells.
Fig. 2 is the structural schematic diagram of one embodiment of the invention.
Fig. 3 is the AA sectional views of Fig. 2.
Fig. 4 is the comparison diagram of the present invention and oxygen mole concentration in existing typical flow channel.
Fig. 5 is the comparison diagram of the present invention and gas transfer effect in existing typical flow channel.
In figure：1- entrance channels, 2- outlet flows, 3- branch flow passages, 4- sprues, 5- banks.
Specific implementation mode
With reference to specific example and attached drawing, the present invention will be further described.
The present invention provides a kind of flow channels for proton exchange membrane fuel cells, as shown in Figures 2 and 3, including is arranged in bipolar plates
On cathode flow channels, cathode flow channels include having the entrance channel 1 of entrance, the outlet flow 2 with outlet and at least one
The entrance of branch flow passage 3, branch flow passage 3 is connected to entrance channel 1, and the outlet of branch flow passage 3 is connected to outlet flow 2, at least
It is arranged at intervals with sprue 4 in one branch flow passage 3 so that reduce sectional area of the branch flow passage 3 at sprue 4.Branch flow passage 3 it
Between structure be bank 5.The top of sprue 4 is equal with 5 top of bank, between the bottom and the bottom of branch flow passage 3 of sprue 4
Equipped with space for gas to pass through, sprue 4 is fixedly connected with bank 5.The sprue 4 covers 3 sectional area of branch flow passage
60%-80%.Sprue 4 is arranged along 3 equidistant interval of branch flow passage.
In the present embodiment, in Proton Exchange Membrane Fuel Cells flow-field plate, the integral layout of cathode flow channels is 20mm*21mm
Rectangle, the width of the branch flow passage 3 is 1mm, and the height of branch flow passage 3 is 0.85mm；The width of bank 5 is 0.5mm；It is stifled
The width of block 4 is 1mm, and the height of sprue 4 is 0.595mm（Account for the 70% of 3 height of branch flow passage）, the length of sprue 4 is 1mm.
The distance between adjacent sprue 4 is 2.5mm；Each branch flow passage 3 is equipped with 5 sprues 4, the sprue nearest from entrance channel
The distance between 4 and entrance are 2mm.The transmission characteristic of concentrations of reactant gas gradient and barometric gradient optimization reaction gas in each runner,
The utilization ratio for improving reaction gas advantageously reduces resistance to mass tranfer, improves mass-transfer efficiency.
The comparative example of invention：Comparative example is designed using traditional straight channel, and parameter is identical as the present embodiment runner, affluent-dividing
Road length is 20mm, width 1mm, is highly 0.85mm, and bank width is 0.5mm.
Compared with the present embodiment has been carried out performance with the Traditional DC road of comparative example under identical operating conditions, experimental condition
For：Air wetting degree 10%, operating pressure 1ATM, operation temperature 363K, H2O and O2The mass fraction of component is respectively 0.018,
0.229.Performance comparison result is as shown in Figure 4,5.
Fig. 4 gives the comparison of oxygen mole concentration in two kinds of runners.Comparative example is in the oxygen mole on runner direction
Concentration is smaller than the oxygen mole concentration in the embodiment of the present invention always, it follows that depositing due to sprue in the embodiment of the present invention
So that gas pressure drop is larger in runner, air velocity is also higher, and mass transfer effect becomes apparent than comparative example.
Fig. 5 gives the comparison of efficient coefficient in two kinds of runners.Comparative example is due to using Traditional DC road so that its
Pressure drop is too small, and efficient coefficient is constantly in compared with low state, and several wave crests are in below sprue in the embodiment of the present invention, by
This can be seen that the embodiment of the present invention by increasing sprue, improves its efficient coefficient, makes the profit of gas in electrode runner
It is greatly improved with rate.
Improvement of the present invention in traditional proton exchange membrane parallel fluid channels structure, according to runner total arrangement shape, Dan Liu
The characteristics of geometry and size and spacing of sprue and arrangement can regulate and control in road improves reaction gas transmission utilization ratio, carries
High battery performance and service life.
Above example is merely to illustrate the design philosophy and feature of the present invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
According to equivalent variations or modification made by disclosed principle, mentality of designing, within protection scope of the present invention.
Claims (7)
1. a kind of flow channels for proton exchange membrane fuel cells, including the cathode flow channels that are arranged in bipolar plates, cathode flow channels include tool
There are entrance channel, the outlet flow with outlet and at least one branch flow passage of entrance, the entrance and entrance of branch flow passage
Runner is connected to, and the outlet of branch flow passage is connected to outlet flow, it is characterised in that：It is arranged at intervals at least one branch flow passage
Sprue so that reduce sectional area of the branch flow passage at sprue.
2. flow channels for proton exchange membrane fuel cells according to claim 1, it is characterised in that：Described in the sprue covering
Branch flow passage sectional area 60%-80%.
3. flow channels for proton exchange membrane fuel cells according to claim 1 or 2, it is characterised in that：Between branch flow passage
Structure is bank, and the top of sprue is equal at the top of the bank, and gas supply is equipped between the bottom of sprue and the bottom of branch flow passage
Body by space, sprue is fixedly connected with bank.
4. flow channels for proton exchange membrane fuel cells according to claim 1, it is characterised in that：The sprue is along affluent-dividing
Road equidistant interval setting.
5. flow channels for proton exchange membrane fuel cells according to claim 4, it is characterised in that：The width of the branch flow passage
Degree is 1mm, and the height of branch flow passage is 0.85mm；Structure between branch flow passage is bank, and the width of bank is 0.5mm；Sprue
Width is 1mm, and the height of sprue is 0.595mm, and the length of sprue is 1mm.
6. flow channels for proton exchange membrane fuel cells according to claim 5, it is characterised in that：Between adjacent sprue away from
From for 2.5mm；The distance between the sprue and entrance nearest from entrance channel are 2mm.
7. flow channels for proton exchange membrane fuel cells according to claim 6, it is characterised in that：The cathode flow channels it is whole
The rectangle that body layout is 20mm*21mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378148.7A CN108550875B (en) | 2018-04-25 | 2018-04-25 | Proton exchange membrane fuel cell flow channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810378148.7A CN108550875B (en) | 2018-04-25 | 2018-04-25 | Proton exchange membrane fuel cell flow channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108550875A true CN108550875A (en) | 2018-09-18 |
| CN108550875B CN108550875B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810378148.7A Active CN108550875B (en) | 2018-04-25 | 2018-04-25 | Proton exchange membrane fuel cell flow channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014168A (en) * | 2023-02-16 | 2023-04-25 | 山东大学 | Fuel cell flow field plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009377A (en) * | 2006-01-27 | 2007-08-01 | 三星Sdi株式会社 | Bipolar plate for fuel cell |
| CN101253645A (en) * | 2005-10-11 | 2008-08-27 | 丰田自动车株式会社 | Gas separator for fuel cell and fuel cell |
| CN101800317A (en) * | 2010-04-09 | 2010-08-11 | 新源动力股份有限公司 | Proton exchange membrane fuel cell bipolar plate with gas flow field |
| CN201796995U (en) * | 2010-03-30 | 2011-04-13 | 上海恒劲动力科技有限公司 | Plate for fuel cell and fuel cell thereof |
| CN102170002A (en) * | 2011-04-07 | 2011-08-31 | 沈阳建筑大学 | Fuel cell flow field structure with depth gradually-diminished flow channels |
| CN102299356A (en) * | 2011-07-18 | 2011-12-28 | 中国东方电气集团有限公司 | Current collector of flow battery and flow battery |
-
2018
- 2018-04-25 CN CN201810378148.7A patent/CN108550875B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101253645A (en) * | 2005-10-11 | 2008-08-27 | 丰田自动车株式会社 | Gas separator for fuel cell and fuel cell |
| CN101009377A (en) * | 2006-01-27 | 2007-08-01 | 三星Sdi株式会社 | Bipolar plate for fuel cell |
| CN201796995U (en) * | 2010-03-30 | 2011-04-13 | 上海恒劲动力科技有限公司 | Plate for fuel cell and fuel cell thereof |
| CN101800317A (en) * | 2010-04-09 | 2010-08-11 | 新源动力股份有限公司 | Proton exchange membrane fuel cell bipolar plate with gas flow field |
| CN102170002A (en) * | 2011-04-07 | 2011-08-31 | 沈阳建筑大学 | Fuel cell flow field structure with depth gradually-diminished flow channels |
| CN102299356A (en) * | 2011-07-18 | 2011-12-28 | 中国东方电气集团有限公司 | Current collector of flow battery and flow battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014168A (en) * | 2023-02-16 | 2023-04-25 | 山东大学 | Fuel cell flow field plate |
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| CN108550875B (en) | 2021-11-16 |
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