CN109921080A - A kind of flow field structure of fuel cell or redox flow batteries pole plate - Google Patents
A kind of flow field structure of fuel cell or redox flow batteries pole plate Download PDFInfo
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- CN109921080A CN109921080A CN201711317904.7A CN201711317904A CN109921080A CN 109921080 A CN109921080 A CN 109921080A CN 201711317904 A CN201711317904 A CN 201711317904A CN 109921080 A CN109921080 A CN 109921080A
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- flow field
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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
It is a kind of for fuel cell/redox flow batteries flow field structure, the pem cell includes two end plates and the single battery that is placed between two end plates, the single battery includes bipolar plates and membrane electrode, and the bipolar plates include parallel flow anodic configuration and cathode flow field structure；The redox flow batteries include two end plates and the single battery group that is placed between two end plates, and the single battery group includes electrode material, diaphragm and bipolar plates, and the bipolar plates include positive flow field structure and cathode flow field structure.The flow field structure can make anode and cathode fluid distrbution more uniform compared with conventional flow field structure, to keep the reflection in electrode more uniform.
Description
Technical field
The present invention relates to fuel cell/redox flow batteries technical fields, flow more particularly to a kind of fluid
And distribution structure.
Background technique
Fuel cell is a kind of the chemical energy being stored in compound fuel to be converted into electric energy by chemically reacting
Device.Proton Exchange Membrane Fuel Cells is usually made of anode, cathode and proton exchange membrane.In cell operation, combustion
Material occurs oxidation reaction in anode catalyst surface and generates proton and electronics, and proton reaches cathode, oxygen by proton exchange membrane
Reduction reaction occurs on cathod catalyst surface and proton and generates water, electronics is then done work by external circuit and reaches cathode.Oxidation is also
Stoste galvanic battery is a kind of novel bulk electrochemical energy storage device, and positive and negative anodes electrolyte is respectively stored in different fuel tanks
Interior each self-loopa, a kind of high-performance battery that reactive ion passes through diaphragm and the electric discharge of other side liquid reactions.
The flowing and distribution that electrode reaction substance is all referred in battery, flow reactant using traditional flow field structure
When body distributes, since reactant constantly reacts the increase so as to cause reactant concentration with flow distance in flow process
And reduce, this also means that reactant is by being unevenly distributed in battery during entrance to output flow.Non-uniform stream
It is different that body distribution will lead in battery reaction rate everywhere, different so as to cause the inconsistent and quantity of heat production of electric close distribution everywhere,
Influence battery performance and service life.
Summary of the invention
The present invention is to solve in fuel cell/redox flow batteries operational process since reactant is flowing over
It is constantly consumed in journey, causes reactant to be unevenly distributed in electrode surface poor so as to cause the uniformity in battery discharge procedure
Problem and improved flow field structure.
The present invention is realized using mode in detail below:
A kind of fuel cell or redox flow batteries flow field structure, it is first-class including being equipped in a plane of plate body
Body flow field, first fluid flow field include first fluid runner；It is characterized by:
In being provided with second fluid flow field in first fluid flow field, second fluid flow field includes second fluid runner；
First fluid runner and second fluid runner are spaced apart from each other setting；I.e. in along perpendicular to the adjacent of fluid flow direction
Second fluid runner is equipped between first fluid runner, while in along the adjacent second fluid runner perpendicular to fluid flow direction
Between be equipped with first fluid runner.
Further, the entrance in first fluid flow field is disposed adjacent with the outlet in second fluid flow field, second fluid flow field
Entrance be disposed adjacent with the outlet in first fluid flow field, flow through fluid in the runner of first fluid flow field and flow through second
Fluid in the runner of body flow field is at counter-current flow mode.
Further, the fluid for flowing into first fluid flow field inlet is identical as the fluid of second fluid flow field entrance is flowed into,
Due to two runner reverse flows, reactant concentration is had differences in two adjacent channels of same position, to promote mass transfer under ridge, is mentioned
High battery performance.
Further, the first fluid flow field is identical with the flow field structure in second fluid flow field, and flow field structure includes snake
Shape flow field, interdigital shape flow field, parallel flow field, round flow field or bionical flow field.
Further, including being equipped with first fluid flow field in a plane of plate body, first fluid flow field is by ridge and conduct
The groove A of first fluid runner is constituted, and the ridge in first fluid flow field is equipped with the groove B as second fluid runner.
Further, groove B is 2 or more, the region other than the groove A and groove B in first fluid flow field regions
Equipped with connected by groove C between 1 or more groove C, different groove B；
Or, the region other than the groove A and groove B in first fluid flow field regions is equipped with 1 or more groove C,
1 or more groove D being arranged inside plate body and/or in another side surface of plate body；Pass through groove C between different groove B
It is connected with groove D；It is through the through-hole connection between groove B and groove D when groove B is connected with groove D.
It further, include in the same plane two adjacent flowing flow fields being completely reversed, and the reversed flow field exists
Length of flow across is consistent in electrode effective area.
A kind of fuel cell/redox flow batteries flow field structure, the flow field structure include two in the same plane
The adjacent flowing flow field being completely reversed, and reversed flow field length of flow across in electrode effective area is consistent.Due to two
Runner reverse flow, reactant concentration has differences in two adjacent channels of same position, to promote mass transfer under ridge, improves battery
Performance.
The flow field structure includes that serpentine flow, interdigital shape flow field, parallel flow field, round flow field, bionical flow field etc. are various
Flow field structure.
The flowing material is certain density reactant, and the substance is consistent in two inlet concentration.
The flow field A and B is counter-current flow and flow path is consistent as far as possible.
Design can effectively solve object during fuel cell/redox flow batteries reagent flow according to the present invention
Fluid distrbution problem of non-uniform caused by matter consumes.The uniformity of fluid distrbution in cell operation is improved to make battery put
Electricity is more uniform, and then keeps heat production in battery discharge procedure more uniform, improves the uniformity and service life of battery, avoids
The formation of pin hole and the change of mechanical structure in film caused by local reaction temperature is excessively high.
Detailed description of the invention:
Fig. 1 is bipolar plates schematic diagram；Wherein 1 is bipolar plates；
Fig. 2 is that membrane electrode assembles MEA figure；Wherein 2 assembled for membrane electrode；
Fig. 3 is embodiment one stream field pattern；
Fig. 4 is the second-rate field pattern of embodiment；
Fig. 5 is one test result figure of embodiment；
Fig. 6 is two test result figure of embodiment.
Specific embodiment:
Illustrate a specific embodiment of the invention with reference to the accompanying drawings etc..
Specific embodiment includes:
Bipolar plates 1, the circulation for fluid distribution and conduction oil；Membrane electrode assembly 2, the composition list of fuel cell pile
Member；
Working principle:
Fuel cell is a kind of the chemical energy being stored in compound fuel to be converted into electric energy by chemically reacting
Device.Proton Exchange Membrane Fuel Cells is usually made of anode, cathode and proton exchange membrane.In cell operation, combustion
Material occurs oxidation reaction in anode catalyst surface and generates proton and electronics, and proton reaches cathode, oxygen by proton exchange membrane
Reduction reaction occurs on cathod catalyst surface and proton and generates water, electronics is then done work by external circuit and reaches cathode.Oxidation is also
Stoste galvanic battery is a kind of novel bulk electrochemical energy storage device, and positive and negative anodes electrolyte is respectively stored in different fuel tanks
Interior each self-loopa, a kind of high-performance battery that reactive ion passes through diaphragm and the electric discharge of other side liquid reactions.
Fluid makes up mutually the concentration difference in adjacent channels by countercurrent flow in bipolar plate runner, promotes to pass under ridge
Matter.The sum of reactant concentration is equal in two adjacent channels in entire flow field, guarantees each position fluid point inside flow field
The uniformity of cloth, to make in discharge process the close distribution of electricity more uniform, avoid electric discharge it is uneven caused by hot-spot it is existing
As the formation with hot localised points, uniform heat distribution is that stress suffered by remaining material components of inside battery is more uniform, is avoided
Decay caused by unbalanced stress, extends the service life of battery.
Specific embodiment:
Embodiment one: 1 anode of bipolar plates using conventional serpentine configuration, cathode flow field structure using counterflow serpentine structure into
Row DMFC battery performance test selects the effective area of membrane electrode assembly 2 to carry out bipolar plate structure for 50 square centimeters of electrode
Verifying.Battery discharge procedure uses 100mA cm-2The close carry out discharge test of electricity, anode use 0.5M methanol solution, and cathode uses
Air feed, anode and cathode are 3 times of metering specific input chargings.Cell operation shows excellent stability, passes through 300
Hour stability test test result shows that the stability of battery in the process of running is better than conventional flow field structure.
Embodiment two: 1 anode of bipolar plates using conventional serpentine configuration, cathode flow field structure using countercurrent parallel structure into
Row DMFC battery performance test selects the effective area of membrane electrode assembly 2 to carry out bipolar plate structure for 50 square centimeters of electrode
Verifying.Battery discharge procedure uses 200mA cm-2The close carry out discharge test of electricity, anode use 0.5M methanol solution, and cathode uses
Air feed, anode and cathode are 3 times of metering specific input chargings.Cell operation shows excellent stability, passes through 200
Hour stability test test result shows that the stability of battery in the process of running is better than conventional flow field structure.
What present embodiment can effectively solve to be unevenly distributed when fuel cell/redox flow batteries fluid flowing asks
Topic.Fluid makes up mutually the concentration difference in adjacent channels by countercurrent flow in bipolar plate runner, promotes mass transfer under ridge.?
The sum of reactant concentration is equal in two adjacent channels in entire flow field, guarantees the equal of inside flow field each position fluid distrbution
Even property, to make in discharge process the close distribution of electricity more uniform, avoid electric discharge it is uneven caused by hot-spot phenomenon drawn game
Portion's hot spot is emerged, and uniform heat distribution is that stress suffered by remaining material components of inside battery is more uniform, avoids stress not
Decay caused by, extends the service life of battery.
Claims (7)
1. a kind of fuel cell or redox flow batteries flow field structure, including being equipped with first fluid in a plane of plate body
Flow field, first fluid flow field include first fluid runner；It is characterized by:
In being provided with second fluid flow field in first fluid flow field, second fluid flow field includes second fluid runner；
First fluid runner and second fluid runner are spaced apart from each other setting；I.e. in along perpendicular to adjacent the first of fluid flow direction
Second fluid runner is equipped between fluid course, while between the adjacent second fluid runner perpendicular to fluid flow direction
Equipped with first fluid runner.
2. flow field structure as described in claim 1, it is characterised in that:
The entrance in first fluid flow field is disposed adjacent with the outlet in second fluid flow field, the entrance in second fluid flow field with it is first-class
The outlet in body flow field is disposed adjacent, and is flowed through the fluid in the runner of first fluid flow field and is flowed through in second fluid stream field flow road
Fluid is at counter-current flow mode.
3. flow field structure as claimed in claim 2, it is characterised in that: flow into the fluid of first fluid flow field inlet and flow into the
The fluid of two fluid flow field inlets is identical, and due to two runner reverse flows, reactant concentration is deposited in two adjacent channels of same position
In difference, to promote mass transfer under ridge, battery performance is improved.
4. flow field structure as described in claim 1, it is characterised in that:
The first fluid flow field is identical with the flow field structure in second fluid flow field, and flow field structure includes serpentine flow, interdigital shape
Flow field, parallel flow field, round flow field or bionical flow field.
5. the flow field structure as described in claim 1-4 is any, it is characterised in that:
Including being equipped with first fluid flow field in a plane of plate body, first fluid flow field is by ridge and as first fluid runner
Groove A is constituted, and the ridge in first fluid flow field is equipped with the groove B as second fluid runner.
6. flow field structure as claimed in claim 5, it is characterised in that:
Groove B is 2 or more, and the region other than the groove A and groove B in first fluid flow field regions is equipped with 1 or more
Groove C, different groove B between by groove C be connected；
Or, the region other than the groove A and groove B in first fluid flow field regions is equipped with 1 or more groove C, in plate
1 or more groove D being arranged in internal portion and/or another side surface of plate body；By groove C and recessed between different groove B
Slot D is connected；It is through the through-hole connection between groove B and groove D when groove B is connected with groove D.
7. the flow field structure as described in claim 1-6 is any, it is characterised in that:
It include in the same plane two adjacent flowing flow fields being completely reversed, and the reversed flow field is in electrode effective area
Length of flow across is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711317904.7A CN109921080A (en) | 2017-12-12 | 2017-12-12 | A kind of flow field structure of fuel cell or redox flow batteries pole plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711317904.7A CN109921080A (en) | 2017-12-12 | 2017-12-12 | A kind of flow field structure of fuel cell or redox flow batteries pole plate |
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| CN109921080A true CN109921080A (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711317904.7A Pending CN109921080A (en) | 2017-12-12 | 2017-12-12 | A kind of flow field structure of fuel cell or redox flow batteries pole plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768721A (en) * | 2021-02-02 | 2021-05-07 | 武汉理工大学 | Composite serpentine flow channel structure and all-vanadium redox flow battery comprising same |
| CN112786914A (en) * | 2021-02-23 | 2021-05-11 | 上海电气集团股份有限公司 | Bipolar plate and fuel cell |
| CN114935951A (en) * | 2022-04-08 | 2022-08-23 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
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| CN2893939Y (en) * | 2006-04-12 | 2007-04-25 | 中国科学院大连化学物理研究所 | Proton exchange film fuel battery flow field structure |
| CN101388465A (en) * | 2007-09-14 | 2009-03-18 | 富准精密工业(深圳)有限公司 | Fuel cell polar plate and fuel cell using the same |
| CN101622744A (en) * | 2007-12-28 | 2010-01-06 | 松下电器产业株式会社 | Fuel cell separator and fuel cell provided with same |
| CN101847732A (en) * | 2010-05-28 | 2010-09-29 | 北京科技大学 | Flow field plate of fuel cell and water electrolysis cell with main channel and auxiliary channel |
| CN201812887U (en) * | 2010-05-28 | 2011-04-27 | 北京科技大学 | Portable anode flow field board for direct methanol fuel cell |
| CN105244517A (en) * | 2015-10-12 | 2016-01-13 | 浙江工业大学 | Active drainage flow field for bipolar plate of proton exchange membrane fuel cell |
| CN206432333U (en) * | 2017-01-04 | 2017-08-22 | 沈阳建筑大学 | A kind of new fuel cell flow-field plate |
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2017
- 2017-12-12 CN CN201711317904.7A patent/CN109921080A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2893939Y (en) * | 2006-04-12 | 2007-04-25 | 中国科学院大连化学物理研究所 | Proton exchange film fuel battery flow field structure |
| CN101388465A (en) * | 2007-09-14 | 2009-03-18 | 富准精密工业(深圳)有限公司 | Fuel cell polar plate and fuel cell using the same |
| CN101622744A (en) * | 2007-12-28 | 2010-01-06 | 松下电器产业株式会社 | Fuel cell separator and fuel cell provided with same |
| CN101847732A (en) * | 2010-05-28 | 2010-09-29 | 北京科技大学 | Flow field plate of fuel cell and water electrolysis cell with main channel and auxiliary channel |
| CN201812887U (en) * | 2010-05-28 | 2011-04-27 | 北京科技大学 | Portable anode flow field board for direct methanol fuel cell |
| CN105244517A (en) * | 2015-10-12 | 2016-01-13 | 浙江工业大学 | Active drainage flow field for bipolar plate of proton exchange membrane fuel cell |
| CN206432333U (en) * | 2017-01-04 | 2017-08-22 | 沈阳建筑大学 | A kind of new fuel cell flow-field plate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768721A (en) * | 2021-02-02 | 2021-05-07 | 武汉理工大学 | Composite serpentine flow channel structure and all-vanadium redox flow battery comprising same |
| CN112786914A (en) * | 2021-02-23 | 2021-05-11 | 上海电气集团股份有限公司 | Bipolar plate and fuel cell |
| CN114935951A (en) * | 2022-04-08 | 2022-08-23 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
| CN114935951B (en) * | 2022-04-08 | 2024-01-30 | 山东国创燃料电池技术创新中心有限公司 | Temperature control method for fuel cell test fixture |
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Application publication date: 20190621 |
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| RJ01 | Rejection of invention patent application after publication |