CN110380090A - A kind of unitized fuel cell bipolar plate - Google Patents
A kind of unitized fuel cell bipolar plate Download PDFInfo
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- CN110380090A CN110380090A CN201910681933.4A CN201910681933A CN110380090A CN 110380090 A CN110380090 A CN 110380090A CN 201910681933 A CN201910681933 A CN 201910681933A CN 110380090 A CN110380090 A CN 110380090A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—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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- 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
- H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
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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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
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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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
- H01M8/1006—Corrugated, curved or wave-shaped MEA
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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
This application provides a kind of unitized fuel cell bipolar plates, including cathode plate, anode plate, the membrane electrode being sealed between cathode plate and anode plate, the surface opposite with membrane electrode of the cathode plate is provided with air flow channel, cooling water flow conduits are equipped at the air flow channel back side, the surface opposite with membrane electrode of the anode plate is provided with hydrogen runner, the upper end of the bipolar plates is provided with the air intlet being connected with air flow channel, the hydrogen inlet being connected with hydrogen runner, the cooling water outlet being connected with cooling water flow conduits, the lower end of the bipolar plates is provided with the air outlet slit being connected with air flow channel, the hydrogen outlet being connected with hydrogen runner, the cooling water inlet being connected with cooling water flow conduits.
Description
Technical field
This application involves field of fuel cell technology, especially a kind of unitized fuel cell bipolar plate.
Background technique
Fuel cell is a kind of electrochemical reaction appts that can convert chemical energy to electric energy, due to not by Carnot cycle
Limitation, theoretically its energy conversion efficiency is higher than internal combustion engine and (reaches as high as 80% or more, generally not less than 50%), and have
Have zero-emission, without mechanical noise many advantages, such as, therefore in military and civilian field by favor.It is used in fuel cell
Electrolyte it is different, fuel cell can be divided into five seed types: alkaline fuel cell (AFC), phosphoric acid fuel cell (PAFC),
Molten carbonate fuel cell (MCFC), solid oxide fuel cell (SOFC) and Proton Exchange Membrane Fuel Cells (PEMFC).
Wherein PEMFC uses solid polymer membrane as electrolyte, with structure is simple, operating temperature is low, energy conversion
The advantages that high-efficient, has advantageous advantage as mobile power source.It is reported that at present Germany, France developed with
PEMFC is the submarine of power, and top motor corporation, the world Deng Shuojia, Toyota Motor company has then developed with PEMFC
For the mass production of power fuel cell electric vehicle (Fuel Cell Electric Vehicle, be abbreviated as FCEV or
FCV).As a kind of important mobile electrical source of power, PEMFC has good development prospect.
Fuel cell is a kind of chemical devices that chemical energy possessed by fuel is directly changed into electric energy, also known as electrochemistry
Electric organ.It is the 4th kind of generation technology after hydroelectric generation, heat energy power-generating and nuclear electric power generation.Since fuel cell is
The Gibbs free energy part in fuel chemical energy is converted into electric energy by electrochemical reaction, not by the limit of Carnot cycle effect
System, thus it is high-efficient；In addition, fuel cell uses fuel and oxygen as raw material, without mechanical transmission component, therefore there is no noise
Pollution, the pernicious gas given off are few.Fuel cell is highly suitable for communications and transportation, stationary power generation and portable neck
Domain.From energy saving and from the perspective of preserving the ecological environment, fuel cell is most promising generation technology.In recent years
Come, countries in the world are applied to automotive field all in positive research using fuel cell as power source.
Proton Exchange Membrane Fuel Cells (proton exchange membrane fuel cell) is a kind of fuel cell,
It is equivalent to " inverse " device of water electrolysis in principle.Its monocell is made of anode, cathode and proton exchange membrane, and anode is hydrogen combustion
Expect the place aoxidized, cathode is the place of oxidant reduction, and the catalyst for accelerating electrode electro Chemical reaction is all contained at the two poles of the earth,
Medium of the proton exchange membrane as transmitting H+, only allows H+ to pass through, and the electronics that H2 loses then passes through from conducting wire.It is suitable when work
In a DC power supply, anode, that is, power cathode, cathode, that is, positive pole.
Each PEMFC monocell is by two pole plates (anode plate and a cathode plate) and is clipped between two pole plates
Membrane electrode assembly at.The membrane electrode is fitted together by anode catalyst, proton exchange membrane, cathod catalyst and is constituted.In sun
Gas diffusion layers (GDL), the gas diffusion are further typically provided between pole plate and membrane electrode and between membrane electrode and cathode plate
Layer is usually made of ventilative carbon paper or carbon cloth, some documents are using gas diffusion layers as a part of membrane electrode, and some are literary
It offers using gas diffusion layers as the individual component of one of PEMFC.It is provided with fuel flow channel on the anode plate of PEMFC, the combustion
Stream road be fuel (hydrogen or methanol etc. are at normal temperatures and pressures with energy-containing compound existing for gas or liquid form) flowing and
The place of transmission, fuel are transmitted to anode catalyst via it.It is provided with oxidant flow channel on the cathode plate of PEMFC, the oxygen
Agent runner is the place of oxidant (usually oxygen or air) flowing and transmission, and oxidant reaches cathode catalysis via it
Agent.By means of the fuel flow channel and oxidant flow channel, fuel and oxidant can be continuously transported to fuel cell
It is interior to alloing fuel cell continuously to export electric energy.
Typical water cooling Proton Exchange Membrane Fuel Cells is made of cathode flow field plate 1, membrane electrode 2, anode flow field board 3, film
Electrode 2 is generally placed upon among two pieces of conductive flow-field plates, and flow-field plate is both used as current collector plate, also the machinery as membrane electrode 2
Support.Runner in flow-field plate provides fuel, oxidant, cooling water and enters anode, cathode, the cooling channel for participating in reaction, together
When also provide take away in fuel cell operation generate water channel.
Summary of the invention
The application technical problems to be solved are to provide a kind of unitized fuel cell bipolar plate.
In order to solve the above-mentioned technical problem, this application provides a kind of unitized fuel cell bipolar plate, including cathode plate,
Anode plate, the membrane electrode being sealed between cathode plate and anode plate, the surface setting opposite with membrane electrode of the cathode plate
There is air flow channel, is equipped with cooling water flow conduits, the surface setting opposite with membrane electrode of the anode plate at the air flow channel back side
There is hydrogen runner, the upper end of the bipolar plates is provided with the air intlet being connected with air flow channel, is connected with hydrogen runner
Logical hydrogen inlet, the cooling water outlet being connected with cooling water flow conduits, the lower end of the bipolar plates is provided with and air stream
Air outlet slit that road is connected, the hydrogen outlet being connected with hydrogen runner, the cooling water inlet being connected with cooling water flow conduits.
Preferably, sectional area of the air flow channel at air intlet is greater than the sectional area at air outlet slit；It is described
Sectional area of the hydrogen runner at hydrogen inlet be greater than the sectional area at hydrogen outlet；The cooling water flow conduits are in cooling water
The sectional area of entrance is less than the sectional area at cooling water outlet.
Preferably, the air flow channel and hydrogen runner are gradual change runner, gradually from the entrance of runner to outlet platform stepwise
Change or smooth type gradual change.
Preferably, the air flow channel includes two or more air subflows road, each air subflow road
Upper end corresponds to an air intlet, the corresponding air outlet slit in the lower end in each air subflow road, adjacent air
It is mutually separated between runner by a first partition.
Preferably, the hydrogen runner includes two or more hydrogen subflows road, on each hydrogen subflow road
A corresponding hydrogen inlet is held, each hydrogen subflow road lower end corresponds to a hydrogen outlet, leads between adjacent hydrogen subflow road
A second partition is crossed to be mutually separated.
Preferably, the air subflow road and the hydrogen subflow road are serpentine flow path.
Preferably, the cooling water flow conduits are packaging type runner.
Preferably, it is provided on four apex angles of the cathode plate, anode plate and membrane electrode for fixed and positioned
Location hole.
Preferably, the side of the opposite membrane electrode of the cathode plate is equipped with a circle cathode sealing ring, the cathode plate
Air flow field, air intlet, air outlet slit be respectively positioned in the cathode sealing ring；The opposite membrane electrode of the anode plate
Side be equipped with a circle anode seal circle, hydrogen runner, hydrogen inlet and the hydrogen outlet of the anode plate are respectively positioned on described
Anode seal circle in.
A kind of unitized fuel cell bipolar plate of the application compared with the prior art, the advantages of the present invention are as follows:
1. taking full advantage of membrane electrode catalyst, the generating efficiency of fuel cell is improved.
2. balancing the pressure at both sides that the membrane electrode near at fuel gas outlet is subject to, improve membrane electrode uses the longevity
Life improves the service life of fuel cell in turn, namely reduces the cost of fuel cell.
3. the change of cooling water of fuel cell and air ports sectional area can reduce the power damage of air compressor machine and water pump
It loses, the excessive power drain that fuel cell pack obtains auxiliary system can be reduced.
4. simultaneously, because of most of heat generation when hydrogen has just enter into system of reaction, the lesser import section of cooling water
The flow velocity for the cooling water inlet for being is larger, helps to improve the heat-sinking capability of cooling system.
5. the design in this separate type flow field had both shortened gas in pile internal flow process, so that hydrogen and air exist
Inner flow passage is easier to distribute, while also assuring making full use of for entire reactive flowfield region, and alleviate internal gas
The design and difficulty of processing of runner have good advantage for the processing of the flow field conversion zone of large area, can body well
Change the power density of entire pile.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application bipolar plates.
Fig. 2 is the structural schematic diagram of the anode plate of the application bipolar plates.
Fig. 3 is the structural schematic diagram of the cathode plate air flow channel side of the application bipolar plates.
Fig. 4 is the structural schematic diagram of the cathode plate cooling water flow conduits side of the application bipolar plates；
Fig. 5 is the structural schematic diagram of the width smooth gradual change of the air flow channel of the application；
Fig. 6 is the structural schematic diagram of the width ladder gradual change of the air flow channel of the application；
Fig. 7 is the structural schematic diagram of the depth smooth gradual change of the air flow channel of the application；
Fig. 8 is the structural schematic diagram of the depth ladder gradual change of the air flow channel of the application；
Fig. 9 is the structural schematic diagram of the depth and width ladder gradual change of the air flow channel of the application；
Figure 10 is the structural schematic diagram of the depth and width smooth gradual change of the air flow channel of the application.
Wherein: 302,106, the first hydrogen outlet；303,107, first air intlet；304,108, cooling water outlet；
305,109, second air intlet；306,110, second hydrogen outlet；313,101, first air outlet slit；312,102, first hydrogen
Gas import；311,103, cooling water inlet；310,104, second hydrogen inlet；309,105, second air outlet slit；301,314,
111, location hole；113, first partition；315, second partition；112, cathode sealing ring；307, anode seal circle；A1, A2, hydrogen
Flow field；B, cooling water flow；C1, C2, air flow field.
Specific embodiment
The application is described further in the following with reference to the drawings and specific embodiments, so that those skilled in the art can be with
It more fully understands the application and can be practiced, but illustrated embodiment is not as the restriction to the application.
With reference to Fig. 1, a kind of unitized fuel cell bipolar plate of the invention is made of cathode plate, membrane electrode and anode plate,
Partial region between anode plate and cathode plate is bonded together by glue, and hydrogen stream place is wherein provided on anode plate
Domain, the back side in hydrogen flow field region are smooth planes；The thickness of cathode plate is larger than anode plate, is provided on cathode plate
Air flow field region is the cooling water flow conduits for taking away the heat that reaction generates at the back side in air flow field region, wherein cold
But water flow passage is collectively constituted by the cooling water flow conduits in the smooth flat and cathode plate on anode plate, and bipolar plates are rectangle knot
Structure.
The side of the anode plate and membrane electrode forms fuel gas body cavity, and the both ends of the fuel gas body cavity are respectively
The outlet of the entrance and fuel gas of fuel gas, when multi-layer double-pole plate is superimposed, the entrance and fuel gas of fuel gas
The sharing channel of the outlet composition fuel gas inlet and outlet of body；
The other side of the cathode plate and membrane electrode forms air chamber, and the both ends of the air chamber are air respectively
The outlet of entrance and air, when multi-layer double-pole plate is superimposed, the outlet of the entrance and air of air forms air ports
Sharing channel；
The another side of the cathode plate is the runner of cooling water, viscous with the back side of adjacent anode plate fuel air chamber side
It being combined to form cooling water cavity, the both ends of the cooling water cavity are the outlet of the entrance and cooling water of cooling water respectively, when
Multi-layer double-pole plate is superimposed, the sharing channel of the outlet composition cooling water outlet and inlet of the entrance and cooling water of cooling water.
The anode plate and membrane electrode of the bipolar plates constitute hydrogen flow passage chamber, the film of the cathode plate and fuel cell
Electrode constitutes oxygen flow passage chamber, and cooling water flow conduits chamber is formed between cathode plate and anode plate.
With reference to Fig. 2, the rectangular edges of anode flow field board are arranged in petiolarea and anode upper end areas under the anode on anode flow field board
On two shorter parallel sides, and fitly it is respectively in the two sides up and down of anode flow field board.Anode upper end areas is provided with first
Air outlet slit 313, the first hydrogen inlet 312, cooling water inlet 311, the second hydrogen inlet 313, the second air outlet slit 309；?
Petiolarea is provided with the first hydrogen outlet 302, the first air intlet 303, cooling water outlet 304, the second air intlet under anode
305, the second hydrogen outlet 306, cross sectional shape is rectangle but the size in section is not identical, and on each rectangle
There are four lesser rounded corners to transition.
With reference to Fig. 3, the rectangular edges of cathode flow field plate are arranged in petiolarea and cathode upper end areas under the cathode on cathode flow field plate
On two shorter parallel sides, and fitly it is respectively in the left and right sides of cathode flow field plate.Petiolarea is provided with first under cathode
Air outlet slit 101, the first hydrogen inlet 102, cooling water inlet 103, the second hydrogen inlet 104, the second air outlet slit 105；?
Cathode upper end areas is provided with the first hydrogen outlet 106, the first air intlet 107, cooling water outlet 108, the second air intlet
109, the second hydrogen outlet 110, cross sectional shape is rectangle but the size in section is not identical, and on each rectangle
There are four lesser rounded corners to transition, the inlet and outlet channel of cooling water, hydrogen and air and anode plate shape and structure
It is all the same.
It is put down where petiolarea as shown in figure 3, the first air outlet slit 101 and the second air outlet slit 105 are separately positioned under cathode
The two sides on row side, cooling water inlet are located at the middle of petiolarea under cathode, in cooling water outlet 108 and the first air outlet slit 101
And second be respectively the first hydrogen inlet 102 and the second hydrogen inlet 104 between air outlet slit 105, under entire cathode petiolarea from
Right-to-left is in turn arranged are as follows: the first air outlet slit 101, the first hydrogen inlet 102, cooling water inlet 103, the second hydrogen inlet
104, the second air outlet slit 105.
As shown in figure 3, the first hydrogen outlet 106 and the second hydrogen outlet 110 are put down where being separately positioned on cathode upper end areas
The two sides on row side, cooling water outlet 108 is located at the middle of cathode upper end areas, in cooling water outlet 108 and the first hydrogen outlet
106 and second be respectively the first air intlet 107 and the second air intlet 109, entire cathode upper end between hydrogen outlet 110
Area in turn arranges from top to bottom are as follows: the first hydrogen outlet 106, the first air intlet 107, cooling water outlet 108, the second air
Import 109, the second hydrogen outlet 110.
The counter-flow designs of this hydrogen and air are for the ease of cathode inlet close to cathode inlet, thus dense due to water
It spends gradient and to realize water coke slurry by film, because the water that big quantitative response generates is assembled in cathode outlet, and it is corresponding
Hydrone concentration is lower at hydrogen inlet, and water is acted on and due to the concentration difference at two across proton exchange membrane so that hydrogen moistens
It is wet, guarantee that the hydrogen ion that catalytic action generates there can be enough hydrones to carry through exchange membrane, reduces ohm pole of battery
Change, improves the output performance of monocell.
The sectional area of air intake is greater than the sectional area of outlet, and reason for this is that air to react in bipolar plates
Afterwards, oxygen is consumed a part, and the volume of gas becomes smaller, and the sectional area exported reduces the gas that can guarantee entire reaction process
The uniformity of bulk concentration；In addition it can increase the back pressure of air flow channel, to reduce to provide the pneumatics of pressure and flow
The pressure loss of machine reduces power output, improves the operational efficiency of whole system；
The sectional area of hydrogen inlet is greater than the sectional area of hydrogen outlet, and when the import volume for increasing hydrogen gas, reaction is remaining
Hydrogen can be recycled by hydrogen outlet, reduce fuel cell gas inlet and outlet pressure difference, increase the intracavitary gas of fuel gas
The uniformity of bulk concentration increases the performance of fuel cell, extends the service life of membrane electrode.
The sectional area of cooling water inlet is less than the sectional area of outlet, and reason for this is that one side pile reaction process
In most of heat be to be generated in the first half of runner, the sectional area of the entrance of cooling water reduces, then identical water pump
Cooling water flow velocity increases under power, and the sectional area of heat-sinking capability enhancing, this outer vent increases, and can reduce the resistance of cooling water flow conduits
Power.Further, the air entry and exit, the sectional area of fuel gas entry and exit and the change of cooling water entry and exit are adopted
With the mode for changing entrance width.
Referring to figs. 2 and 3, the air flow field and hydrogen flow field of the cathode plate and cathode plate are all made of combined type flow field
Design improve the stability of entire reaction process energy output to reinforce the uniformity of gas distribution.So-called combined type
It is two pieces of individual flows, response area that flow field, which passes through a partition 113,315 for biggish reactive flowfield region division originally,
Lesser reactive flowfield region (C1, C2 and A1, A2)；The single-pass of hydrogen and air is set at both ends relative to original bipolar plates
Road inlet port, change into both ends be arranged two hydrogen and air inlet and outlet, two independent flow fields carry out respectively hydrogen and
The flowing of air, it is non-interference；And cooling water flow (B) due to fluid uniformity distribution requirement be not very high, so
The processing for just not doing two independent basin designs, is also beneficial to the processing of product in this way.
The design in this separate type flow field had both shortened gas in pile internal flow process, so that including hydrogen and air
Portion's runner is easier to distribute, while also assuring making full use of for entire reactive flowfield region, and alleviates internal gas stream
The design and difficulty of processing in road have good advantage for the processing of the flow field conversion zone of large area, can structural reform well
The power density of entire pile.
The small flow field of independence that separation design goes out is carried out further for entire flow field, in addition to two small flow fields of independence
Outside, we can also further be increased, and can extend to N number of (N >=2)；And the structure of cooling water flow (B) is set
Meter, because the film-cooled heat is relatively little, we use the design for the cooling water flow conduits singly imported and exported, but work as cooling surface
When product demand is larger, coolant flow field can also be arranged to N number of small flow field of independent separate type (N >=2), to improve entire double
The cooling capacity of pole plate strengthens heat dissipation, guarantees the operating temperature of pile in default range.
It is petiolarea under the anode upper end areas, anode stream place, anode seal area, anode on anode flow field board, fixed with reference to Fig. 2
Position hole shares one of anode seal circle 307 and seals.With reference to Fig. 3, cathode upper end areas, cathode flow field area on cathode flow field plate,
Petiolarea, location hole share one of cathode sealing ring 112 and seal under cathode.Such design reduces sealing ring in entire flow-field plate
On accounting, increase participated on cathode plate and cathode plate chemical reaction flow field area, promote entire flow-field plate summation watt rating
Density.
Furthermore between cathode plate and the hydrogen outlet and cooling water inlet of cathode plate, hydrogen inlet and cooling water outlet it
Between be provided with location hole 111,314, to the fixed and positioned of entire bipolar plates, guarantee the neat and consistent of installation.
Using the fuel cell of structure of the present invention, the sectional area of fuel gas inlet is greater than fuel gas outlet
Sectional area, the sectional area of air intake are greater than the sectional area of air outlet slit, and the sectional area of cooling water inlet is less than cooling water outlet
Sectional area, the air inflow of air and fuel, same Airflow can be increased under conditions of bipolar plates of the same area in this way
The sectional area increase of the outlet in road helps to increase the back pressure of reaction air, reduces the power loss of air compressor machine, the pressure of cooling water
Drop reduces, and reduces the power loss of water pump, reduces the added power dissipation of system, while increasing the import volume of fuel gas, makes
Its import volume is greater than its reaction equivalent, increases the uniformity of fuel gas intracavity gas concentration, increases the performance of fuel cell, prolong
The service life of long membrane electrode.
The air flow channel and hydrogen runner of the application is gradual change runner, from the entrance of runner to the gradual change of outlet platform stepwise or flat
Gliding style gradual change.It is described in detail by taking air flow channel as an example, sectional area of the air flow channel from air intlet to air outlet slit gradually becomes smaller:
Embodiment one: as shown in figure 5, the smooth gradual change of the width for air flow channel；
Embodiment two: as shown in fig. 6, the ladder gradual change of the width for air flow channel；
Embodiment three: as shown in fig. 7, the smooth gradual change of the depth for air flow channel；
Example IV: as shown in figure 8, the ladder gradual change of the depth for air flow channel；
Embodiment five: as shown in figure 9, the depth and width ladder gradual change of air flow channel；
Embodiment six: as shown in Figure 10, the depth and width smooth gradual change of air flow channel；
Embodiment seven: air flow channel is groove depth smooth gradual change, groove width ladder gradual change (not regarding in figure)；
Embodiment eight: air flows to as groove depth ladder gradual change, and groove width smooth gradual change (does not regard) in figure.
In this application, the depth direction of runner is that vertically the direction with bipolar plates plate face, the width direction of runner are vertical
Directly with flow channel length direction, and it is parallel to the direction of bipolar plates plate face.
Compared with the prior art, the advantages of the present invention are as follows:
1. taking full advantage of membrane electrode catalyst, the generating efficiency of fuel cell is improved.
2. balancing the pressure at both sides that the membrane electrode near at fuel gas outlet is subject to, improve membrane electrode uses the longevity
Life improves the service life of fuel cell in turn, namely reduces the cost of fuel cell.
3. the change of cooling water of fuel cell and air ports sectional area can reduce the power damage of air compressor machine and water pump
It loses, the excessive power drain that fuel cell pack obtains auxiliary system can be reduced.
4. simultaneously, because of most of heat generation when hydrogen has just enter into system of reaction, the lesser import section of cooling water
The flow velocity for the cooling water inlet for being is larger, helps to improve the heat-sinking capability of cooling system.
5. the design in this separate type flow field had both shortened gas in pile internal flow process, so that hydrogen and air exist
Inner flow passage is easier to distribute, while also assuring making full use of for entire reactive flowfield region, and alleviate internal gas
The design and difficulty of processing of runner have good advantage for the processing of the flow field conversion zone of large area, can body well
Change the power density of entire pile.
Embodiment described above is only the preferred embodiment lifted to absolutely prove the application, the protection model of the application
It encloses without being limited thereto.Those skilled in the art made equivalent substitute or transformation on the basis of the application, in the application
Protection scope within.The protection scope of the application is subject to claims.
Claims (9)
1. a kind of unitized fuel cell bipolar plate, which is characterized in that including cathode plate, anode plate, be sealed in cathode plate and sun
Membrane electrode between pole plate,
The surface opposite with membrane electrode of the cathode plate is provided with air flow channel, is equipped with cooling water flow at the air flow channel back side
Road,
The surface opposite with membrane electrode of the anode plate is provided with hydrogen runner,
The hydrogen that the upper end of the bipolar plates is provided with the air intlet being connected with air flow channel, is connected with hydrogen runner
Import, the cooling water outlet being connected with cooling water flow conduits, the lower end of the bipolar plates is provided with to be connected with air flow channel
Air outlet slit, the hydrogen outlet being connected with hydrogen runner, the cooling water inlet that is connected with cooling water flow conduits.
2. a kind of unitized fuel cell bipolar plate as described in claim 1, which is characterized in that the air flow channel is in sky
The sectional area of gas entrance is greater than the sectional area at air outlet slit；Sectional area of the hydrogen runner at hydrogen inlet is greater than
Sectional area at hydrogen outlet；Sectional area of the cooling water flow conduits at cooling water inlet is less than cutting at cooling water outlet
Area.
3. a kind of unitized fuel cell bipolar plate as claimed in claim 2, which is characterized in that the air flow channel and hydrogen
Flow channel is gradual change runner, from the entrance of runner to the gradual change of outlet platform stepwise or smooth type gradual change.
4. a kind of unitized fuel cell bipolar plate as claimed in claim 2, which is characterized in that the air flow channel includes
Two or more air subflows road, the corresponding air intlet in the upper end in each air subflow road, each sky
The lower end in gas subflow road corresponds to an air outlet slit, is mutually separated between adjacent air subflow road by a first partition.
5. a kind of unitized fuel cell bipolar plate as claimed in claim 4, which is characterized in that the hydrogen runner includes
Two or more hydrogen subflows road, each corresponding hydrogen inlet in the hydrogen subflow road upper end, each hydrogen subflow road
Lower end corresponds to a hydrogen outlet, is mutually separated between adjacent hydrogen subflow road by a second partition.
6. a kind of unitized fuel cell bipolar plate as claimed in claim 5, which is characterized in that the air subflow road with
The hydrogen subflow road is serpentine flow path.
7. a kind of unitized fuel cell bipolar plate as described in claim 1, which is characterized in that the cooling water flow conduits are
Packaging type runner.
8. a kind of unitized fuel cell bipolar plate as described in claim 1, which is characterized in that the cathode plate, anode
It is provided on four apex angles of plate and membrane electrode for fixed and positioned location hole.
9. a kind of unitized fuel cell bipolar plate as described in claim 1, which is characterized in that the cathode plate it is opposite
The side of membrane electrode is equipped with a circle cathode sealing ring, and air flow field, air intlet, the air outlet slit of the cathode plate are respectively positioned on
In the cathode sealing ring；The side of the opposite membrane electrode of the anode plate is equipped with a circle anode seal circle, the sun
Hydrogen runner, hydrogen inlet and the hydrogen outlet of pole plate are respectively positioned in the anode seal circle.
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| CN111952623A (en) * | 2020-07-16 | 2020-11-17 | 合肥工业大学 | Bipolar plate of fuel cell |
| CN112038655A (en) * | 2020-09-10 | 2020-12-04 | 广州云也科技有限公司 | Fuel cell with bipolar plate sealing structure |
| CN112458488A (en) * | 2020-10-27 | 2021-03-09 | 中国船舶重工集团公司第七一八研究所 | Water-cooled electrolytic cell polar plate |
| CN112635786A (en) * | 2020-12-22 | 2021-04-09 | 新源动力股份有限公司 | Method for improving fluid distribution uniformity of galvanic pile and galvanic pile |
| CN112909283A (en) * | 2021-03-22 | 2021-06-04 | 苏州弗尔赛能源科技股份有限公司 | Proton exchange membrane fuel cell bipolar plate |
| CN113488673A (en) * | 2021-06-18 | 2021-10-08 | 湖南工程学院 | Bipolar plate of fuel cell |
| CN118016926A (en) * | 2024-04-08 | 2024-05-10 | 北京氢璞创能科技有限公司 | Cathode closed structure of air cooling fuel cell |
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| CN113488673A (en) * | 2021-06-18 | 2021-10-08 | 湖南工程学院 | Bipolar plate of fuel cell |
| CN118016926A (en) * | 2024-04-08 | 2024-05-10 | 北京氢璞创能科技有限公司 | Cathode closed structure of air cooling fuel cell |
| CN118016926B (en) * | 2024-04-08 | 2024-06-07 | 北京氢璞创能科技有限公司 | Cathode closed structure of air cooling fuel cell |
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Application publication date: 20191025 |