CN104143645A - Proton exchange membrane fuel cell flow channel - Google Patents
Proton exchange membrane fuel cell flow channel Download PDFInfo
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- CN104143645A CN104143645A CN201410360862.5A CN201410360862A CN104143645A CN 104143645 A CN104143645 A CN 104143645A CN 201410360862 A CN201410360862 A CN 201410360862A CN 104143645 A CN104143645 A CN 104143645A
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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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- 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 proton exchange membrane fuel cell flow channel. The proton exchange membrane fuel cell flow channel comprises at least one branch flow channel, wherein a plurality of geometric partition structures with variable contact angles are arranged on the flow channel wall of each branch flow channel in the flow direction of gas and the water drainage direction, and the contact angles of the geometric partition structures with the variable contact angles are reduced sequentially from each branch flow channel inlet to the corresponding branch flow channel outlet. The proton exchange membrane fuel cell flow channel has the advantages of being simple in structure, easy to process and low in cost; due to the fact that the contact angle gradual change structures of different partition areas are arranged in the flow direction of the gas, the contact angles in each branch flow channel are reduced sequentially from the corresponding inlet to the corresponding outlet, the hydrophilicity gradually increases, and therefore surface tension gradients of water drops exist on each branch flow channel wall face, the transmission driving force of the water drops is increased in the decreasing direction of the contact angles of each branch flow channel, transmission of the water drops from the interior of each branch flow channel to the corresponding outlet, and water generated on a cathode can be fast drained to the corresponding outlet through each branch flow channel.
Description
Technical field
The present invention relates to a kind of runner, relate in particular to the runner of discharging for fuel battery cathode with proton exchange film product water.
Background technology
Proton Exchange Membrane Fuel Cells is made up of the electrolyte membrance between anode, negative electrode and electrode, and anode, negative electrode using hydrogen and oxygen as fuel, directly change chemical energy into electric energy respectively, and unique product is the water generating after electrochemical cathode reaction.The runner of fuel cell be fuel reaction gas from external transmission to inside battery and the product of pole catalyze layer be transferred to the main thoroughfare of outside batteries from electrode, the reactant transmission at the two poles of the earth and the discharge of product are to affect the fuel availability of whole fuel cell and the key factor of battery performance.Parallel fluid channels and serpentine flow path are typical conventional fuel cell runners, as depicted in figs. 1 and 2, typical runner comprise have import inlet channel, there is the outlet flow of outlet, at least one branch's runner, the import of each branch's runner is connected with inlet channel respectively, the outlet of each branch's runner is connected with outlet flow respectively, and gas enters runner by import, discharges from outlet through runner.In figure, the direction of arrow is gas transport direction in runner.For the traditional runner shown in Fig. 1 and Fig. 2, all exist the fuel cell water capacity that cell cathode produces under high current density easily to assemble obstruction mass transfer channel, affect the problem of battery performance thereby reduce limiting current density.The contact angle of battery runner has determined the close hydrophobic property of battery runner, and the hydrophily of a little higher than electrode diffusion layer of hydrophily of runner conventionally, so that the water generating in electrode can be transferred to outside batteries by runner smoothly.At present, relatively less about the research of the contact angle of battery runner, and the contact angle of runner is all definite value conventionally.Up to the present, about variation and the contact angle design of runner contact angle, the impact of fuel battery cathode with proton exchange film draining and battery performance aspect be there is no to relevant report.
Summary of the invention
The object of the invention is to be to overcome the shortcoming of prior art, a kind of a kind of flow channels for proton exchange membrane fuel cells that is conducive to promote forced drainage effect is provided, this runner can make the rate of discharge of water in cathode flow channels significantly improve, effectively alleviate negative electrode water logging, thereby improve the limiting current density of battery, the service behaviour of battery in large current range is improved.
A kind of flow channels for proton exchange membrane fuel cells of the present invention, it comprises at least one branch's runner, on the flow path wall of each branch's runner, be provided with multiple geometric zoning structures that become contact angle that have along gas flow direction and drainage direction, from branch's runner import to outlet, described multiple contact angles with the geometric zoning structure that becomes contact angle reduce successively.
Advantage of the present invention:
The present invention is simple in structure, be easy to processing and cost lower, by the contact angle grading structure of different subregions is set in gas flow direction, make gradually to reduce to the contact angle to Way out along importer in same branches runner, hydrophily strengthens gradually, cause the existence of water droplet in runner wall surface tension gradient, increase water droplet reduces direction transmission actuating force along runner contact angle, effectively promote water droplet transmission to Way out in runner, make the water that negative electrode produces to discharge and to arrive outlet by runner fast, the velocity of discharge of water is greatly improved, play the effect that promotes draining, under large current work state, can effectively prevent or alleviate negative electrode water logging, reduce the resistance to mass tranfer of reaction gas, thereby improve the power generation performance of battery.
Brief description of the drawings
Fig. 1 is existing typical Proton Exchange Membrane Fuel Cells parallel fluid channels schematic diagram;
Fig. 2 is existing typical Proton Exchange Membrane Fuel Cells serpentine flow path schematic diagram;
Fig. 3 is the different contact angle structural representations of branch's runner as a kind of flow channels for proton exchange membrane fuel cells of the present invention, and wherein l is runner section length, and α is contact angle, α
1﹥ α
2﹥ α
3﹥ α
n-2﹥ α
n-1﹥ α
n;
Fig. 4 is the different contact angle structural representations of branch's runner as a kind of flow channels for proton exchange membrane fuel cells of the present invention, and wherein l is runner section length, l
1﹤ l
2﹤ l
3﹤ l
n; α is contact angle, α
1﹥ α
2﹥ α
3﹥ ﹥ α
n;
Fig. 5 is the different contact angle structural representations of branch's runner as a kind of flow channels for proton exchange membrane fuel cells of the present invention, and wherein l is runner section length, l
1﹥ l
2﹥ l
n-2﹥ l
n-1﹥ l
n; α is contact angle, α
1﹥ α
2﹥ ﹥ α
n-2﹥ α
n-1﹥ α
n;
Fig. 6 and Fig. 7 are polarization curve under 60 DEG C and 100% relative humidity of the fuel cell of existing fixing contact angle runner and the polarization curve of the fuel cell that adopts runner of the present invention under identical operating mode.
Embodiment
The present invention is in traditional proton exchange membrane parallel fluid channels or the structural improvement of serpentine flow path, the feature that can regulate and control according to the surface contact angle of runner and hydrophilic and hydrophobic, obtain the runner layout structure of contact angle gradual change, improve aqueous water in the transmission actuating force of flow passage direction, promote the drainage procedure of product in cathode flow channels, realization has the design processing of different drainability battery runners, can meet output performance and the stability requirement of Proton Exchange Membrane Fuel Cells under different operating modes, especially under high current density, there is better battery performance.
Common battery runner comprises the battery runner being arranged in bipolar plates, and battery runner can be set to one or more in a bipolar plates, and total number can be odd number or even number.Described battery runner comprises having the inlet channel of import, the outlet flow with outlet and at least one branch's runner, the import of each branch's runner is connected with inlet channel respectively, and the outlet of each branch's runner is connected with outlet flow respectively.
As in Figure 3-5, a kind of flow channels for proton exchange membrane fuel cells of the present invention, it comprises at least one branch's runner, on the flow path wall of each branch's runner, be provided with multiple geometric zoning structures that become contact angle that have along gas flow direction and drainage direction, from branch's runner import to outlet, described multiple contact angles with the geometric zoning structure that becomes contact angle reduce successively.
Different contact angles is realized by hydrophilic/hydrophobic agent paint-on technique, the close and distant water-bound preparation method of concrete different contact angles can be referring to document (Journal of the Electrochemical Society (ECS's magazine), 2010,157 (2), pB195; Electrochimica Acta, 2007,52, p2328; Journal of Power Sources (energy magazine), 2013,221, p356; Journal of Power Sources (energy magazine), 2009,194, p838).Most hydrophobic treatment agent is polytetrafluoroethylene (PTFE) solution, material is soaked after certain hour to can obtain the thering is different fixing contact angles hydrophobic structure of (90 ° of >) with the PTFE water-repelling agent of variable concentrations; Obtain and there is hydrophilic material if want, can obtain as benzene sulfonic acid sodium salt, sodium naphthalene sulfonate solution carry out preliminary treatment the hydrophilic-structure that contact angle is less than 90 ° with hydrophilizing agent.
The contact angle that is preferably positioned at branch's flow path wall of the import department of each branch's runner is 60 °-150 °; The contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 0 °-90 °.From import to outlet, the contact angle of branch's flow path wall reduces successively, and water increases successively in the surface tension of runner wall, and the hydrophily of runner strengthens gradually.There are two excellent properties from runner import to the degression type gradual change contact angle topology layout of outlet: 1) surface tension gradient of liquid has promoted water flowing in runner, the transmission of water has been played to orientation and draw, be conducive to the quick discharge of negative electrode aqueous water, alleviate negative electrode water logging, improve water management effect; 2) effect of optimization draining has directly reduced the resistance to mass tranfer of cathode reaction gas, has ensured that the mass transfer under large current work condition is unblocked, has improved the limiting current density of battery and the stability of battery operation.
The flow channel length of the change contact angle of each branch's runner can be equidistant, can be also not equidistant.How the spacing distance that no matter becomes contact angle distributes, and the Changing Pattern of contact angle is along the import of runner and reduces gradually to Way out.The initial contact angle of runner import can be any number between 60 °-150 °, and the final contact angle of runner exit can be any number between 0 °-90 °.
Multiple piecewise intervals with the geometric zoning structure that becomes contact angle of each branch's runner are as shown in Figure 3 along the equidistant setting of being distributed as of gas flow direction, and the runner with different contact angles is spaced apart equidistant (l), the numerical value of contact angle α is between 150 °-0 °, and the order of α numerical value is α
1﹥ α
2﹥ α
3﹥ α
n-2﹥ α
n-1﹥ α
n.Preferably, the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °～130 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 60 °, and the contact angle difference of adjacent geometric zoning structure is 5 °-20 °.The time that water droplet stops in runner within the scope of this is shorter.
Each branch's runner as shown in Figure 4 multiple piecewise intervals with the geometric zoning structures that become contact angle along gas flow direction to be distributed as incremental spaced apart, be l from import to the runner spacing distance of outlet contact angle gradual change
1﹤ l
2﹤ l
3﹤ l
n.Preferably, the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °～150 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 30 °～60 °, the contact angle difference of adjacent geometric zoning structure is 5 °-10 °, and the difference of the adjacent piecewise interval with the geometric zoning structure that becomes contact angle is 5mm.The time that water droplet stops in runner within the scope of this is shorter.
The change contact angle structure of each branch's runner as shown in Figure 5 along gas flow direction to be distributed as degression type spaced apart, be l from import to the runner spacing distance of outlet contact angle gradual change
1﹥ l
2﹥ l
n-2﹥ l
n-1﹥ l
n.Preferably, the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °-150 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 0 °-60 °, the contact angle difference of adjacent geometric zoning structure is 5 °-25 °, and the difference of the adjacent piecewise interval with the geometric zoning structure that becomes contact angle is-5mm～-15mm.The time that water droplet stops in runner within the scope of this is shorter.
Certainly the piecewise interval that each described branch's runner multiple have geometric zoning structures that become contact angle can be also equidistant, incremental or degression type mixing arranged distribution.
Adopt this structural design change contact angle flow channels for proton exchange membrane fuel cells the course of work into: give an inlet pressure in the import department of runner, reaction gas enters runner with certain flow velocity from outside, arrive porous diffusion layer by the transmission in runner, and then arrive Catalytic Layer generation electrochemical reaction.At cathode catalysis layer, along with the continuous generation of electrochemical reaction, reaction product water returns to runner by diffusion layer porous media, and flows towards runner exit along the direction of gas flow.Under large current work state, along with the aggravation of electrochemical reaction, the water of generation is more and more, and the water droplet being penetrated in diffusion layer arrival runner by Catalytic Layer starts to increase.Because the runner of this structural design reduces gradually along the contact angle of the runner wall of gas flow direction, cause water droplet to increase gradually in the surface tension of runner wall, this capillary graded has played traction and facilitation for water droplet in the directed flow of runner, in the mobile process of reaction gas, accelerate water flowing to runner exit, avoid a large amount of water to gather effect in runner, the water logging of electrode has been played to alleviation and elicitation effect.Simultaneously owing to there is no a large amount of ponding in runner, runner import is reduced to the pressure loss of outlet, and the circulation of reaction gas is smooth and easy, has reduced resistance to mass tranfer, the transmission of reaction gas and the transmission of aqueous water have reached the benign cycle of doulbe-sides' victory, are conducive to generally improve the power generation characteristics of battery.For the fuel cell under large current work condition, need reaction gas to supply with sufficient, the large water gaging that negative electrode produces can be discharged fast, and the superiority of this change contact angle flow passage structure design is more obvious.
Below in conjunction with specific embodiment, the present invention is described in detail: table 1 is the parameter configuration case of the different contact angles of fuel cell runner; Table 2 is the time of staying of little water droplet in battery runner under certain gas flow rate, and the fixed value length of battery runner is 20cm.
The contact angle alpha parameter configuration case of table 1 different fuel battery runner
| Case | Fixing α (°) | Gradual change α (°) | αn-αn-1(°) | l n-l n-1(mm) |
| Comparative example 1 | 100 | - | - | - |
| Comparative example 2 | 80 | - | - | - |
| Comparative example 3 | 60 | - | - | - |
| Embodiment 1 | - | 150-90 | 15 | 0 |
| Embodiment 2 | - | 150-60 | 20 | 10 |
| Embodiment 3 | - | 150-30 | 25 | -10 |
| Embodiment 4 | - | 150-0 | 25 | -15 |
| Embodiment 5 | - | 130-60 | 10 | 0 |
| Embodiment 6 | - | 130-60 | 15 | 0 |
| Embodiment 7 | - | 130-60 | 20 | 0 |
| Embodiment 8 | - | 100-60 | 5 | 0 |
| Embodiment 9 | - | 100-30 | 5 | 5 |
| Embodiment 10 | - | 100-0 | 5 | -5 |
| Embodiment 11 | - | 80-50 | 5 | 0 |
| Embodiment 12 | - | 80-30 | 8 | 0 |
| Embodiment 13 | - | 80-0 | 10 | -5 |
| Embodiment 14 | - | 70-40 | 4 | 0 |
| Embodiment 15 | - | 70-20 | 6 | 3 |
| Embodiment 16 | - | 70-0 | 8 | -3 |
| Embodiment 17 | - | 60-30 | 2 | 0 |
| Embodiment 18 | - | 60-20 | 4 | 3 |
| Embodiment 19 | - | 60-10 | 6 | -3 |
| Embodiment 20 | - | 60-0 | 8 | -5 |
The time of staying of water droplet in fixed length battery runner when table 2 inlet gas flow velocity is 200ml/min
| Case | The time of staying (s) of water droplet in runner |
| Comparative example 1 | 25 |
| Comparative example 2 | 60 |
| Comparative example 3 | ﹥200 |
| Embodiment 1 | 15 |
| Embodiment 2 | 16 |
| Embodiment 3 | 14 |
| Embodiment 4 | 10 |
| Embodiment 5 | 15 |
| Embodiment 6 | 14 |
| Embodiment 7 | 13 |
| Embodiment 8 | 14 |
| Embodiment 9 | 13 |
| Embodiment 10 | 12 |
| Embodiment 11 | 20 |
| Embodiment 12 | 18 |
| Embodiment 13 | 16 |
| Embodiment 14 | 25 |
| Embodiment 15 | 22 |
| Embodiment 16 | 20 |
| Embodiment 17 | 30 |
| Embodiment 18 | 28 |
| Embodiment 19 | 26 |
| Embodiment 20 | 25 |
Prior art comparative example: comparative example 1,2,3 is respectively that runner contact angle is fixed as 100 °, 80 ° and 60 °, in the time that induction air flow ratio is 200mL/min, in comparative example 1, water droplet time of staying in the runner of regular length is 25s, comparative example 2 is 60s, and the time of staying of comparative example 3 is greater than 200s.
Embodiments of the invention: as shown in table 2, in the time using the change contact angle runner that improves design, under similarity condition, the time of staying of the water droplet of embodiment in runner obviously shortens.As (the water droplet time of staying is 25s) compared with the comparative example 1 that is fixed as 100 ° with contact angle, adopt the water droplet time of staying corresponding to embodiment 8-10 that change contact angle runner of the present invention does to be respectively 14s, 13s and 12s; Compared with the comparative example 2 that is fixed as 80 ° with contact angle (the water droplet time of staying is 60s), adopt the water droplet time of staying corresponding to embodiment 11-13 that change contact angle runner of the present invention does to be respectively 20s, 18s and 16s; Compared with the comparative example 3 that is fixed as 60 ° with contact angle (water droplet time of staying > 200s), adopt the water droplet time of staying corresponding to embodiment 17-20 that change contact angle runner of the present invention does to be respectively 30s, 28s, 26s and 25s; Water droplet shortening of the time of staying in runner has proved that runner internal drainage efficiency is improved.
As can be seen from the above table:
(1) as shown in table 2, initial contact angle is larger, hydrophobicity is stronger, the time of staying of water droplet in runner is shorter, but in actual fuel cell, the hydrophily of runner is generally greater than the hydrophily of electrode diffusion layer, and to ensure the one-way transmission of water from electrode diffusion layer to runner direction, therefore the contact angle of runner is unsuitable excessive;
(2) for change contact angle flow passage structure of the present invention, the segmentation contact angle difference of runner is larger, is more conducive to the orientation strengthening transmission of water droplet, and as embodiment 5-7, along with contact angle difference increases, the water droplet time of staying shortens gradually;
(3), for change contact angle flow passage structure of the present invention, when the contact angle difference of runner segmentation is fixed, the transmission to water that arranges of point segment distance has a certain impact.Piecewise interval near import is longer, and shorter near the piecewise interval of outlet, the time of staying of water droplet in runner is shorter, and as embodiment 10, the piecewise interval of degression type is conducive to the quick discharge of water;
(4) time of staying of water droplet in runner is subject to the combined influence of the various factors such as contact angle difference between constant interval, runner partition length and gradual change rule and the adjacent sectors of contact angle.
Prior art comparative example: apply the Proton Exchange Membrane Fuel Cells polarization curve of common fixing contact angle (α=100 °) parallel fluid channels as shown in Fig. 6 comparative example 1, experiment condition is: 100%RH, stoichiometric proportion: air: 2; Hydrogen: 1.5, operating pressure: 0.1MPa, operating temperature: 60 DEG C.Along with the increase gradually of current density, output voltage reduces gradually, and current density is 0.9A/cm
2time, the output voltage of battery is 0.52V, energy density reaches peak value 0.46W/cm
2, in the time that current density continues to increase (large galvanic areas, negative electrode produces more water), output voltage and the power density of battery sharply decline.
Embodiments of the invention: as shown in Fig. 6 embodiment 10, when adopting change contact angle runner of the present invention to be assembled into after fuel cell, under same experiment condition, the output performance of battery has obtained obvious lifting, and current density is 1.3A/cm
2time, the output voltage of battery is 0.46V, energy density reaches peak value 0.60W/cm
2, continue to increase current density to 1.7A/cm
2, the output voltage of battery is still more than or equal to 0.3V, and the power density of battery still remains on a higher level (> 0.5W/cm
2), the limiting current density of battery has reached 1.9A/cm
2, far away higher than the 1.2A/cm of comparative example 1
2thereby, proved the superiority of flow passage structure of the present invention aspect raising battery performance.
Prior art comparative example: apply the Proton Exchange Membrane Fuel Cells polarization curve of common fixing contact angle (α=80 °) parallel fluid channels as shown in Fig. 7 comparative example 2, experiment condition is the same.
Embodiments of the invention: as shown in Fig. 7 embodiment 13, when adopting change contact angle runner of the present invention to be assembled into after fuel cell, under same experiment condition, the output performance of battery has obtained obvious lifting in high current density region, and limiting current density is by 1.2A/cm
2be promoted to 1.8A/cm
2, further proved the superiority of flow passage structure of the present invention aspect raising battery performance.(in figure, have two ordinates, that ordinate that arrow is stretched sensing from curve is exactly the ordinate that this curve is corresponding.)
Claims (9)
1. a flow channels for proton exchange membrane fuel cells, it comprises at least one branch's runner, it is characterized in that: on the flow path wall of each branch's runner, be provided with multiple geometric zoning structures that become contact angle that have along gas flow direction and drainage direction, from branch's runner import to outlet, described multiple contact angles with the geometric zoning structure that becomes contact angle reduce successively.
2. flow channels for proton exchange membrane fuel cells according to claim 1, is characterized in that: the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 60 °-150 °; The contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 0 °-90 °.
3. flow channels for proton exchange membrane fuel cells according to claim 1 and 2, is characterized in that: multiple piecewise intervals with the geometric zoning structure that becomes contact angle of each described branch's runner are into equidistantly distributing.
4. flow channels for proton exchange membrane fuel cells according to claim 3, it is characterized in that: the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °-130 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 60 °, and the contact angle difference of adjacent geometric zoning structure is 5 °-20 °.
5. flow channels for proton exchange membrane fuel cells according to claim 1 and 2, is characterized in that: multiple piecewise intervals with the geometric zoning structure that becomes contact angle of each described branch's runner are incremental arranged distribution.
6. flow channels for proton exchange membrane fuel cells according to claim 5, it is characterized in that: the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °-150 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 30 °-60 °, the contact angle difference of adjacent geometric zoning structure is 5 °-10 °, and the difference of the adjacent piecewise interval with the geometric zoning structure that becomes contact angle is 5mm.
7. flow channels for proton exchange membrane fuel cells according to claim 1 and 2, is characterized in that: multiple piecewise intervals with the geometric zoning structure that becomes contact angle of each described branch's runner are degression type arranged distribution.
8. flow channels for proton exchange membrane fuel cells according to claim 7, it is characterized in that: the contact angle that is positioned at branch's flow path wall of the import department of each branch's runner is 100 °-150 °, the contact angle that is positioned at branch's flow path wall in the exit of each branch's runner is 0 °-60 °, the contact angle difference of adjacent geometric zoning structure is 5 °-25 °, and the difference of the adjacent piecewise interval with the geometric zoning structure that becomes contact angle is-5mm～-15mm.
9. flow channels for proton exchange membrane fuel cells according to claim 1 and 2, is characterized in that: the piecewise interval that each described branch's runner multiple have geometric zoning structures that become contact angle mixes arranged distribution into equidistant, incremental or degression type.
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| CN106207223A (en) * | 2015-05-05 | 2016-12-07 | 凌容新能源科技（上海）有限公司 | Fuel cell pack water flow passage |
| CN108390083A (en) * | 2018-01-10 | 2018-08-10 | 江苏乾景新能源产业技术研究院有限公司 | A kind of composite regenerative fuel battery system discharge operating mode startup method |
| CN109802155A (en) * | 2018-12-22 | 2019-05-24 | 一汽解放汽车有限公司 | A kind of bipolar plates and processing method advantageously reducing the loss of fuel cell concentration difference |
| CN111177920A (en) * | 2019-12-27 | 2020-05-19 | 武汉中极氢能产业创新中心有限公司 | Design method and terminal of fuel cell flow channel |
| CN111370728B (en) * | 2020-03-18 | 2021-03-09 | 清华大学 | Fuel cell polar plate flow field and fuel cell polar plate |
| CN113013437A (en) * | 2019-12-20 | 2021-06-22 | 广西大学 | Fuel cell cathode flow channel with gradually-reduced slope surface structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108390083A (en) * | 2018-01-10 | 2018-08-10 | 江苏乾景新能源产业技术研究院有限公司 | A kind of composite regenerative fuel battery system discharge operating mode startup method |
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| CN113013437A (en) * | 2019-12-20 | 2021-06-22 | 广西大学 | Fuel cell cathode flow channel with gradually-reduced slope surface structure |
| CN113013437B (en) * | 2019-12-20 | 2023-08-01 | 广西大学 | Fuel cell cathode runner with gradually-reduced slope structure |
| CN111177920A (en) * | 2019-12-27 | 2020-05-19 | 武汉中极氢能产业创新中心有限公司 | Design method and terminal of fuel cell flow channel |
| CN111177920B (en) * | 2019-12-27 | 2023-09-15 | 格罗夫氢能源科技集团有限公司 | Method and terminal for designing fuel cell flow channel |
| CN111370728B (en) * | 2020-03-18 | 2021-03-09 | 清华大学 | Fuel cell polar plate flow field and fuel cell polar plate |
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Application publication date: 20141112 |