CN207558943U - A kind of fuel battery double plates - Google Patents
A kind of fuel battery double plates Download PDFInfo
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- CN207558943U CN207558943U CN201721583861.2U CN201721583861U CN207558943U CN 207558943 U CN207558943 U CN 207558943U CN 201721583861 U CN201721583861 U CN 201721583861U CN 207558943 U CN207558943 U CN 207558943U
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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
Abstract
The utility model is related to a kind of fuel battery double plates, include the cathode plate and anode plate of the opposite connection in the back side, the front of cathode plate and anode plate is machined with respectively in the air flow field channels of ripple type and hydrogen flow field channel, cooling water flow channel is machined between cathode plate and the back side of anode plate, a pair of of the common air channel connected is respectively provided on cathode plate and anode plate, the shared hydrogen paths of a pair and a pair of shared aquaporin, and it is respectively formed connection air flow field channels, hydrogen flow field channel, the air import/export of the entrance end of cooling water flow channel, hydrogen import/export and cooling water import/export.Compared with prior art, the flow-field plate of the utility model is achieved the purpose that heavy-current discharge, equalizing temperature, is supported started quickly at low temperature and loading, the variation quick response to load using the runner design more optimized, more preferably material prescription, more preferably assembly method.
Description
Technical field
The utility model is related to fuel cell field, more particularly, to a kind of fuel battery double plates.
Background technology
China's atmosphere pollution is serious, under background of the high enterprise of oil price, development new-energy automobile with by from center to
Local governments at various levels put on important agenda.The pure electric vehicle using lithium ion battery with having turned on commercialization process at present
Unlike automobile, fuel cell car has the advantages that fuel supplement is fast, energy density is high, long-endurance protrusion is striven.Vehicle
It is generally used based on Proton Exchange Membrane Fuel Cells (PEMFC), using air or pure oxygen as oxidant, with pure with fuel cell
The hydrogen-rich reformed gas of the HC fuel battery such as hydrogen or methane is as fuel.Due to deriving from a wealth of sources for hydrogen, fuel cell this
The features such as energy conversion efficiency in electro-chemical conversion devices is high, and product is only water, cleanliness without any pollution is increasingly subject to government and whole
The favor of depot.
During operation of fuel cells, need to import and the gaseous reactive material of mean allocation using flow-field plate, i.e., fuel and
Oxidant；In order to discharge waste heat, it is also necessary to import cooling medium by the back side of the mean allocation of friendship to pole plate.Generally speaking, make
For the important composition component of fuel cell, the function of flow-field plate mainly includes：
(1) it collects the electric current that reaction generates and transmits it along the series connection direction of pile；
(2) separate fuel and oxidant, and make it uniform in the cathode of each monocell and anode catalyst surface respectively
Distribution；
(3) discharge generation product water, otherwise reaction interface is once flooded, then the performance of battery and service life all can be by poles
Big influence；
(4) cooling medium is introduced, it is ensured that the temperature of pile is stablized, and is evenly distributed；
(5) separate each section monocell in fuel cell, and the dielectric film of support group flexible relative and micro- by being supported on
Nano active catalyst on meter level carrier.
Under automobile-used environment, especially on passenger car, it is contemplated that can the limitation in space, when normal work with larger
Power density (such as 1W/cm2More than) power generation be investigate Performance data quality primary index.In addition, as onboard power source, vehicle
Fuel cell pile is carried with characteristics such as quick startup, operating mode of quick loading and dynamic change and the cold-startings under environment
Severe requirement is gone out.For this purpose, in the optimization design and processing of flow-field plate, the problem of needing to capture the following aspects：
(1) effective usable floor area of monocell is improved, promotes the discharge energy density of unit area；
(2) meet the fuel to work under high power density to supply with oxidant, pile is enable to work steadily in the long term；
(3) meet under high power density the needs of pile radiates, improve between pile single battery and single battery partial zones
The inconsistency of Temperature Distribution between domain, makes it work steadily in the long term under vehicle-mounted variable working condition；
(4) accuracy of flow-field plate positioning, makes respectively to save in pile when promoting the consistency of flow-field plate processing and pile assembling
Single battery voltage can still maintain consistent and uniform under high current density；
(5) during low-temperature cool starting, by the steady operation of efficient, consistent flow-field plate, high current density (such as 2- is utilized
3A/cm2), a large amount of waste heat when discharging under low-voltage (such as 0.1V) make to become without the low-temperature cool starting under outer auxiliary heating condition
It may；
(6) by stream field plate surface modifying and structure optimization, enable the water generated under high current density operating condition fast
It is rejected to out-pile fastly.For example, hydrophilic surface treatment, can greatly improve liquid water from catalyst and gas diffusion layers to
The migration velocity and efficiency of metallic plate.
In addition, flow-field plate occupies its weight more than 60% and the cost of entire more than 30% pile.Therefore, lead to
Good design and cheap processing technology are crossed, achievees the purpose that reduce flow-field plate cost, for the business of fuel cell car
Changing promotion and application also has far-reaching significance.
101937998 A of patent CN propose a kind of stamping forming metal flow field plate, pass through tour guide's slot of continuous corner
Design, realizes the repeated dispensing to reaction gas, and evenly distributed in active region, it is believed that can effectively slow down in this way " water logging "
Phenomenon.However the defects of design of such diversion trench is also it will be apparent that corresponding i.e. in flow-field plate and membrane electrode assembly (MEA)
" dead zone " that tour guide Qu Biancheng cannot effectively generate electricity necessarily greatly reduces the volumetric specific power density of fuel cell.
Patent CN103205485U proposes a kind of stamped metal flow-field plate conducive to fluid distribution.It devises by supporting point
With channelizing island form air and hydrogen distribution runner, the supporting point can be rectangular, round, oval, trapezoidal, triangle and
The shapes such as fusiformis.However, the presence in excessive water conservancy diversion region, can equally cause the reduction of effective power generation region area, be unfavorable for
The promotion of volumetric specific power density.
Patent CN104701550 A propose a kind of cooling agent pole plate with diversion trench, and stainless steel or titanium is used to weave
Net is as third plate, it is possible to reduce more than 60% cooling water flow resistance.Although it can accomplish than three traditional metallic plate plates
Weight reduce 20%, but than two metallic plates design without advantage.It brings and connects after increased stainless steel or titanium net certainty
The rising of electric shock resistance and the complexity of electric pile structure.
In view of the limitation in above-mentioned flow field plate design, it is necessary to develop a kind of to be more suitable for what is worked under automobile-used operating mode for pole
Pile flow-field plate.
Utility model content
The purpose of this utility model is exactly to provide a kind of fuel cell to overcome the problems of the above-mentioned prior art
Bipolar plates.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of fuel battery double plates include the cathode plate and anode plate of the opposite connection in the back side, the cathode plate and sun
The front of pole plate is machined with respectively in the air flow field channels of ripple type and hydrogen flow field channel, in cathode plate and anode plate
Cooling water flow channel is machined between the back side, a pair of of the common air connected is respectively provided on the cathode plate and anode plate and is led to
Road, a pair of shared hydrogen paths and a pair of shared aquaporin, and be respectively formed connection air flow field channels, hydrogen flow field channel,
Air import/export, hydrogen import/export and the cooling water import/export of the entrance end of cooling water flow channel.
Preferably, the cooling water flow passageway machining is in cathode back or anode back.Water flow field equally has
There are the structures such as common-use tunnel, water flow passage and the water field seal area for the disengaging pile that supplies water.If couple the moon in a manner that sealing is welded
Anode plate, the seal area can be plane；If by the way of adhesive connection, necessity is at the back side of cathode plate or anode plate
Design seal groove.In the utility model, for increased water flow amount, water flow field can also be processed simultaneously at the back side of the two.Such as
Fruit couples cathode-anode plate in a manner that sealing is welded, which can be plane；It if, must by the way of adhesive connection
Seal groove is designed at the back side of cathode plate or anode plate.It is general only to be set on one block of plate for the demand that structure simplifies
Seal groove.
Preferably, the air import/export, hydrogen import/export its respectively with air flow field channels and hydrogen flow field
The junction of channel is covered with bridge piece.The effect of bridge piece mainly support MEA components are respectively to the close of its hydrogen gas side and air side
Envelope, completely cuts off air or hydrogen respectively enters anode flow field or cathode flow field.
Preferably, the cathode plate and anode plate be equipped in its air side and hydrogen gas side respectively air side seal groove and
Hydrogen gas side seal groove is respectively provided with elastic sealing element in air side seal groove and hydrogen gas side seal groove so that formed with it is closed
Air reaction chamber and hydrogen reaction chamber.Elastic sealing element can be in the stacking pressure that pile requires with having under reaction gas operating pressure
Effect sealing, and the electrical contact between the stress of MEA components and MEA components and flow-field plate cannot be influenced.
Preferably, the area ratio of air import/export and air flow field channels is between 8.5%~20%；
The area of hydrogen import/export and hydrogen flow field channel ratio is between 3.5%~8.5%；
The area ratio of cooling water import/export and cooling water flow channel must be between 3.2%~7.3%.Through overcurrent
Mechanics modeling simulation analysis, the disengaging open area of air, hydrogen and water flow passage must be enough big, is just not to influence gas supply
With the discharge of reaction product water, but excessive disengaging open area can influence to participate in the active reaction area area of electrochemical reaction again
Accounting reduces effective area.
In order to improve the supply of a large amount of reaction gas and the discharge of waste heat under low electrical efficiency under high current density, and also not
The access of electronics flowing can be influenced, by rational runner form design, and ensures that the enough cross-sectional areas of single runner are most
Important technical guarantee；However excessive groove depth will certainly increase the thickness of plate, be unfavorable for the promotion of volumetric specific power.In view of
This, by flow dynamics analysis, obtains following preferred scheme, and on cathode plate, the groove depth g of air flow field channels meets：0.4≤
The ratio of g≤0.5mm, the groove width a of air flow field channels and the width b of its back meet：0.8≤a/b≤1.2；
On anode plate, the groove depth h of hydrogen flow field channel meets：0.3≤h≤0.4mm, the groove width c of hydrogen flow field channel with
The ratio of the width d of its back meets：0.8≤c/d≤1.2；
The groove depth i of cooling water flow channel meets：0.2≤i≤0.4mm, the width e of cooling water flow channel and its back
Width f ratio meet：3.0≤e/f≤6.0.
Preferably, the cathode plate is corresponding equipped with position with anode plate and recessed positioned at the outer positioning of its side edge respectively
Slot and the interior location hole positioned at its four corners.Automobile-used pile is generally assembled by the way of cells in series stacking；And
In order to meet powerful output characteristics, the quantity of monocell is likely to be breached as many as hundreds of sections.For numerous cell stack poststacks
Neatly, it is beautiful, it is often more important that in order to ensure stress consistency, so as to ensure the uniform force of sealing element and MEA and big electricity
Optimal voltage uniformity during stream power generation.The utility model employs interior positioning and the dress heap mode of outer positioning combination, maximum limit
Degree ground reduces Form and position error caused by during monocell stacks, and promotes pile air-tightness and the consistency of power generation performance, so as to
Be conducive to be promoted current density during external acting.
Preferably, the cathode plate and anode plate carry out hydrophilic treated, and contact angle θ of the water on its surface is expired
Foot：0°≤θ≤45°.
Preferably, the cathode plate and anode plate are bonded by welding or adhesive and to form entirety.
The utility model is mainly directed towards automobile-used high power density pile, using the runner design more optimized, more preferably material
Formula, more preferably assembly method reach heavy-current discharge, equalizing temperature, support started quickly at low temperature and loading, to load
Change the purpose of quick response.
The processing method of the flow-field plate of the utility model and the material of base material are unlimited, can pass through stainless steel, titanium and its conjunction
A variety of materials such as gold, nickel and its metallic plates such as alloy and aluminium alloy, graphite cake, graphite/metal composite plate, carbon/carbon composite plate
Matter can pass through the various processing method processing such as machine milling, carving, cutting and more efficient etching, punching press, injection and molding
Molding.Preferably, the cathode plate and anode plate are metallic plate, graphite cake, graphite/metal composite plate or carbon/carbon composite plate.More
Preferably, the material of the metallic plate is stainless steel, titanium and its alloy, nickel and its alloy or aluminium alloy.
Cathode plate in the utility model can couple with anode plate for an entirety, also detachable design.The former portion
Part is reduced, conducive to the pile assembling mode of overlapped in series is carried out, but there is no substantive areas both in terms of sealing with conduction
Not.If selecting metallic plate, cathode-anode plate can be welded as bipolar plates by modes such as Laser Welding, electric resistance welding, solderings, also may be used
Coupled by adhesive, water field is finally formed at the back side of two boards, and form effectively sealing；And graphite and various composite materials
Manufactured yin, yang pole plate can then be coupled by adhesive.In split-type design, the separation of yin, yang pole plate, when pile assembles
Rational Seal Design is carried out as long as being integrated, then while sealing can be realized in air, hydrogen and water flow field, is reached
To good conductive effect.
In the utility model, air, hydrogen and cooling water pass through respective common-use tunnel outside pile, since these are shared
The area of channel is enough big, fluid i.e. reachable active reaction area behind extremely short small water conservancy diversion region.It is raised by air flow field, hydrogen
After the distribution of subflow field and water flow field, air and hydrogen can fast strikethrough gas diffusion layers reach Catalytic Layer, reaction product water
It can quickly be taken out of pile；Cooling water can also quickly reach the water flow field corresponding to conversion zone, will react the waste heat of generation
It takes away.
Compared with prior art, the utility model has the following advantages：
(1)：By optimizing the flow channel shape of reaction gas, using the fluid channel of water waveform construction, it is easy to reaction gas
Stablize, equably reach entire reaction surface, at the same time, can swimmingly exclude reaction product --- water；
(2)：It reduces to the greatest extent and even removes the water conservancy diversion region of reaction gas and cooling agent in flow-field plate completely, reduce invalid face
Product；
(3)：The common-use tunnel bore of reaction gas in flow-field plate is increased, the gas on-way resistance in common-use tunnel is down to most
It is low；
(4)：Using interior positioning and the dress heap mode of outer positioning combination, reduce during monocell stacks and make to the maximum extent
Into Form and position error, promote the consistency of pile air-tightness and power generation performance；
(5)：Flow field plate faces use hydrophilic treated, and reaction generation water is made to be easy to, through hydrophobic gas diffusion layers, carry out
In the groove of flow-field plate, so as to rapidly be discharged pile, high current " water logging " phenomenon is avoided.It integrates, fuel can be made
Battery pile achievees the effect that high current density stable discharging.
Description of the drawings
Fig. 1 is cathode plate design plane schematic diagram；
Fig. 2 is anode plate design floor map；
Fig. 3 is the design plane schematic diagram of the cooling water flow (weld plate) not comprising seal groove；
Fig. 4 is the design plane schematic diagram of the cooling water flow (bonded metal plate) comprising seal groove；
Fig. 5 is the degree axonometric schematic diagram of the monocell after the combination of yin, yang pole plate；
Fig. 6 is the schematic cross-sectional view after cathode-anode plate combination；
Fig. 7 is the scale diagrams of the flow field runner of air, hydrogen and cooling water；
Fig. 8 is embodiment one (weld plate) polarization curve；
Fig. 9 is each monocell block diagram of rated point under embodiment one (weld plate)；
Figure 10 is embodiment two (bonded metal plate) polarization curve；
Figure 11 is each monocell block diagram of rated point under embodiment two (bonded metal plate)；
Figure 12 is embodiment three (bonding graphite cake) polarization curve；
Figure 13 is each monocell block diagram of rated point under embodiment three (bonding graphite cake)；
In figure, location hole in 1-, 2- air side seal grooves, 3- cooling waters import/export, the outer positioning grooves of 4-, 5- hydrogen into/
Outlet, 6- air import/export, 7- air side bridge pieces, 8- air flow field channels, 9- hydrogen gas side bridge pieces, 10- hydrogen flow field channels,
11- hydrogen gas side seal grooves, 12- cooling water flow channels, 13- monocell inspection slots.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
A kind of fuel battery double plates include the cathode plate and anode plate of the opposite connection in the back side, the cathode plate and sun
The front of pole plate is machined with respectively in the air flow field channels 8 of ripple type and hydrogen flow field channel 10, in cathode plate and anode
Cooling water flow channel 12 is machined between the back side of plate, being respectively provided with a pair connected on the cathode plate and anode plate shares
Air duct, a pair of shared hydrogen paths and a pair of shared aquaporin, and it is respectively formed connection air flow field channels 8, hydrogen stream
Channel 10, cooling water flow channel 12 entrance end air import/export 6, hydrogen import/export 5 and cooling water import/export
3。
As a kind of preferred embodiment of the utility model, the cooling water flow channel 12 is processed in cathode plate
The back side or anode back.Water flow field equally has the knots such as common-use tunnel, water flow passage and the water field seal area for the disengaging pile that supplies water
Structure.If coupling cathode-anode plate in a manner that sealing is welded, which can be plane；If the side coupled using adhesive
Formula is then necessary to design seal groove at the back side of cathode plate or anode plate.It, can also for increased water flow amount in the utility model
Water flow field is processed simultaneously at the back side of the two.If coupling cathode-anode plate in a manner that sealing is welded, which can be flat
Face；It is if necessary to design seal groove at the back side of cathode plate or anode plate by the way of adhesive connection.For structure letter
The demand of change is general only to set seal groove on one block of plate.
As a kind of preferred embodiment of the utility model, the air import/export 6, hydrogen import/export 5 exist
It (is respectively air side bridge piece 7 and hydrogen that it is covered with bridge piece with the junction of air flow field channels 8 and hydrogen flow field channel 10 respectively
Gas side bridge piece 9).Bridge piece effect mainly support the sealing to its hydrogen gas side and air side respectively of MEA components, completely cut off air or
Hydrogen respectively enters anode flow field or cathode flow field.
Preferably, the cathode plate and anode plate are equipped with air side seal groove 2 in its air side and hydrogen gas side respectively
With hydrogen gas side seal groove 11, elastic sealing element is respectively provided in air side seal groove 2 and hydrogen gas side seal groove 11 so that formed
With closed air reaction chamber and hydrogen reaction chamber.Elastic sealing element can be pressed in the stacking pressure that pile requires and reaction gas work
It is effectively sealed under power, and the electrical contact between the stress of MEA components and MEA components and flow-field plate cannot be influenced.
As a kind of preferred embodiment of the utility model, air import/export 6 and the area of air flow field channels 8
The ratio between 8.5%~20%；
The area of hydrogen import/export 5 and hydrogen flow field channel 10 ratio is between 3.5%~8.5%；
The area ratio of cooling water import/export 3 and cooling water flow channel 12 must be between 3.2%~7.3%.By
Hydrodynamics modeling simulation analysis, the disengaging open area of air, hydrogen and water flow passage must be enough big, and being just not, which influences gas, supplies
Should with the discharge of reaction product water, but excessive disengaging open area can influence again really participate in electrochemical reaction active reaction area
The accounting of area, reduces effective area.
In order to improve the supply of a large amount of reaction gas and the discharge of waste heat under low electrical efficiency under high current density, and also not
The access of electronics flowing can be influenced, by rational runner form design, and ensures that the enough cross-sectional areas of single runner are most
Important technical guarantee；However excessive groove depth will certainly increase the thickness of plate, be unfavorable for the promotion of volumetric specific power.In view of
This, by flow dynamics analysis, obtains following preferred scheme, and on cathode plate, the groove depth g of air flow field channels 8 meets：0.4
The ratio of≤g≤0.5mm, the groove width a of air flow field channels 8 and the width b of its back meet：0.8≤a/b≤1.2；
On anode plate, the groove depth h of hydrogen flow field channel 10 meets：0.3≤h≤0.4mm, the groove width of hydrogen flow field channel 10
The ratio of the c and width d of its back meets：0.8≤c/d≤1.2；
The groove depth i of cooling water flow channel 12 meets：0.2≤i≤0.4mm, the width e of cooling water flow channel 12 and its
The ratio of the width f of back meets：3.0≤e/f≤6.0.
As a kind of preferred embodiment of the utility model, the cathode plate is corresponding equipped with position with anode plate
And respectively positioned at the outer positioning groove 4 of its side edge and the interior location hole 1 positioned at its four corners.Automobile-used pile is generally using single electricity
The mode of pond series stack is assembled；And in order to meet powerful output characteristics, the quantity of monocell is likely to be breached number
As many as hundred sections.In order to which numerous cell stack poststacks are neat, beautiful, it is often more important that in order to ensure stress consistency, so as to ensure
Optimal voltage uniformity when the uniform force and high current of sealing element and MEA generate electricity.The utility model employs interior positioning
With the dress heap mode of outer positioning combination, Form and position error caused by during monocell stacks is reduced to the maximum extent, promotes pile
The consistency of air-tightness and power generation performance, so as to be conducive to be promoted current density during external acting.
As a kind of preferred embodiment of the utility model, the cathode plate and anode plate carry out hydrophilic place
Reason, and contact angle θ of the water on its surface is met：0°≤θ≤45°.
As a kind of preferred embodiment of the utility model, the cathode plate and anode plate pass through welding or viscose glue
Agent is bonded to form entirety.
The processing method of the flow-field plate of the utility model and the material supported are unlimited, can pass through stainless steel, titanium and its conjunction
A variety of materials such as gold, nickel and its metallic plates such as alloy and aluminium alloy, graphite cake, graphite/metal composite plate, carbon/carbon composite plate
Matter can pass through the various processing method processing such as machine milling, carving, cutting and more efficient etching, punching press, injection and molding
Molding.Preferably, the cathode plate and anode plate are metallic plate, graphite cake, graphite/metal composite plate or carbon/carbon composite plate.More
Preferably, the material of the metallic plate is stainless steel, titanium and its alloy, nickel and its alloy or aluminium alloy.
Cathode plate in the utility model can couple with anode plate for an entirety, also detachable design.The former portion
Part is reduced, conducive to the pile assembling mode of overlapped in series is carried out, but there is no substantive areas both in terms of sealing with conduction
Not.If selecting metallic plate, cathode-anode plate can be welded as bipolar plates by modes such as Laser Welding, electric resistance welding, solderings, also may be used
Coupled by adhesive, water field is finally formed at the back side of two boards, and form effectively sealing；And graphite and various composite materials
Manufactured yin, yang pole plate can then be coupled by adhesive.In split-type design, the separation of yin, yang pole plate, when pile assembles
Rational Seal Design is carried out as long as being integrated, then while sealing can be realized in air, hydrogen and water flow field, is reached
To good conductive effect.
In the utility model, air, hydrogen and cooling water pass through respective common-use tunnel outside pile, since these are shared
The area of channel is enough big, fluid i.e. reachable active reaction area behind extremely short small water conservancy diversion region.It is raised by air flow field, hydrogen
After the distribution of subflow field and water flow field, air and hydrogen can fast strikethrough gas diffusion layers reach Catalytic Layer, reaction product water
It can quickly be taken out of pile；Cooling water can also quickly reach the water flow field corresponding to conversion zone, will react the waste heat of generation
It takes away.
Embodiment 1
A kind of fuel battery double plates, include the cathode plate and anode plate of the opposite connection in the back side, structure respectively such as Fig. 1 and
Shown in Fig. 2, the front of cathode plate and anode plate is machined with respectively in the air flow field channels 8 of ripple type and hydrogen flow field channel
10, the design of this ripples grain pattern is conducive to increase the turbulent flow of air and hydrogen, reaches and promote it to perpendicular to gas diffusion layers
The effect that direction is transmitted.Cooling water flow channel 12 is machined between cathode plate and the back side of anode plate, as shown in figure 3, this
Embodiment uses is processed, and cathode plate and anode plate are combined using laser welding mode at the back side of anode plate, is formed
Monocell as shown in Figure 5.
In the present embodiment, a pair of of the common air channel connected, a pair are respectively provided on the cathode plate and anode plate altogether
Aquaporin is shared with hydrogen paths and a pair, and is respectively formed connection air flow field channels 8, hydrogen flow field channel 10, cooling water
Air import/export 6, hydrogen import/export 5 and the cooling water import/export 3 of the entrance end of flow field channel 12.Air import/export 6,
Hydrogen import/export 5 is covered with air side bridge piece respectively with the junction of air flow field channels 8 and hydrogen flow field channel 10 respectively at it
7 and hydrogen gas side bridge piece 9, wherein, air side bridge piece 7 is used to support the sealing of MEA offside hydrogen field, prevents hydrogen from entering cathode stream
, vice versa, hydrogen gas side bridge piece 9 it is similar be also to be used to support the sealing of MEA offside air field, prevent air from entering anode
Flow field.In cathode plate, the air import/export 6 that air common-use tunnel of the air through left side in Fig. 1 is formed enters among flow-field plate
Air flow field channels 8, be uniformly distributed in diffusion layer and catalyst, with through interior circuit through proton exchange membrane from anode transmit
Electrochemical reaction generation water occurs for the proton to come over and the electronics passed over through external circuit.Product water is with consuming partial oxidation
Air, carry part waste heat discharged from the air import/export 6 on right side.Equally, hydrogen is then passed through such as the hydrogen in the upper left corner in Fig. 2
The hydrogen import/export 5 that common-use tunnel is formed enters hydrogen flow field channel 10, after participating in the electrochemical reaction that hydrogen is aoxidized, edge
Diagonally opposed flowing is finally discharged from hydrogen import/export 55.In the present embodiment, four, the back side angle of anode plate nearby also processes
There is monocell inspection slot 13.
In the present embodiment, the cathode plate and anode plate are equipped with air side seal in its air side and hydrogen gas side respectively
Slot 2 and hydrogen gas side seal groove 11, available for installation tree lace or the sealant sealing element formed in situ using high plastic state so that shape
Into with closed air reaction chamber and hydrogen reaction chamber.Elastic sealing element can work in the stacking pressure that pile requires with reaction gas
It is effectively sealed under pressure, and the electrical contact between the stress of MEA components and MEA components and flow-field plate cannot be influenced.
In the present embodiment, cooling water fluid channel uses the form processing group of the flow-field plate not comprising seal groove such as Fig. 3
Into that is, cathode plate is formed with anode plate using welding manner, and cooling water is the cooling formed after cathode plate and anode plate welding
It is flowed in water flow field channel 12.
In the present embodiment, the anode plate in cathode plate and Fig. 2 in Fig. 1 is connected through laser welding, and one piece of composition is convenient for peace
The bipolar plates of dress, as shown in Figure 5.By Fig. 5 by obtaining sectional view as shown in Figure 6 after AA cuttings.Fig. 7 is the flow field channel of Fig. 6
Partial partial enlarged view, which show the flow path features of the flow field channel of air, hydrogen and cooling water.Air flow field channels 8
Groove width a and the wide b of back be 1.0mm, ratio 1:1, groove depth g are 0.4mm；The groove width c and back of hydrogen flow field channel 10
Wide d is respectively 1.68mm and 1.63mm, and ratio is about 1.03:1, groove depth h are 0.4mm；The groove width e of cooling water flow channel 12 with
The wide f of back is respectively 1.2mm and 0.20mm, and ratio is about 6:1.
In the present embodiment, cathode plate and anode plate carry out hydrophilic treated, and cause water in the contact angle θ on its surface at 0 °
Between~45 °.
The present embodiment reaches 340cm using active area2Large area flow-field plate and MEA, assemble the small piles of 15 sections.
Fig. 8 is its polarization curve, and test condition is as follows：The metering of air/hydrogen chemistry is than being 2.5/1.4；Air/hydrogen gas import pressure is
120kPa/125kPa；The import humidity of air/hydrogen gas is controlled in 80%RH.As seen from the figure, monocell average voltage is specified
Current density during point (i.e. 0.65V) reaches 1320mA/cm2, maximum power density reaches 1042mW/cm2.It shows good
Performance.
Fig. 9 is the voltage block diagram of 15 monocells when monocell average voltage reaches rated point (0.65V).It can by figure
See, single cell consistency is good, and standard deviation is only 5.5mV.And pile is more than 2000mA/cm2High current density under
It can be with steady operation.
Embodiment 2
As different from Example 1, in the present embodiment, the cathode plate of metal material and the combination of anode plate are to use
Fluid sealant, and non-solder.As shown in figure 4, the back side of anode plate, i.e. water flow field side, the four of cooling water flow channel 12
Increase the seal groove of the sealant sealing element formed in situ available for installing preforming tree lace or using high plastic state in week.Such as
Fruit installs preforming tree lace, and tree lace must be driven plain completely after pile assembling is pressurized, to ensure good electrical contact；If it utilizes
The sealant sealing element formed in situ of high plastic state then needs to use corresponding fixture before sealant cures by cathode-anode plate pressure
It closes, until sealant could unclamp after being fully cured.It is caused by avoiding in welding process using the advantages of combination
Metallic plate is heated bulging, deformation, distortion or warpage.But shortcoming is the micro-bubble in unreasonable tree lace design, sealant, with
And excessive cooling water pressure etc. may all influence the degree of combining closely between cathode-anode plate during use, and the transmission of electronics is made
Into harmful effect, so as to greatly influence the performance during generating effect, especially high current density of fuel cell.
Remaining design is completely the same with embodiment one, and details are not described herein again.
The present embodiment uses active area 340cm2Flow-field plate and MEA, assemble the small piles of 15 sections.Figure 10 is its pole
Change curve, test condition is as follows：The metering of air/hydrogen chemistry is than being 2.5/1.4；Air/hydrogen gas import pressure is 120kPa/
125kPa；The import humidity of air/hydrogen gas is controlled in 80%RH.As seen from the figure, monocell average voltage in rated point (i.e.
Current density when 0.65V) is 1000mA/cm2, maximum power density 926mW/cm2。
Figure 11 is the voltage block diagram of 15 monocells when monocell average voltage reaches rated point (0.65V).By scheming
As it can be seen that single cell consistency is good, standard deviation 7.9mV.And pile is more than 2000mA/cm2High current density under
It can be with steady operation.
Embodiment 3
Unlike the first two embodiment, in the present embodiment, the material of flow-field plate is changed to using graphite, remaining with reality
Apply that example 2 is identical, the present embodiment employs the mode cathode assembly plate and anode plate of fluid sealant.Compared with metallic plate, graphite cake tool
There is excellent corrosion resistance, but electric conductivity is more slightly worse than metallic plate.
The design and implementation example two of graphite flow field plates is completely the same, and details are not described herein again.
Similarly, the present embodiment uses active area 340cm2Flow-field plate and MEA, assemble the small piles of 15 sections.Figure
12 be its polarization curve, and test condition is as follows：The metering of air/hydrogen chemistry is than being 2.5/1.4；Air/hydrogen gas import pressure is
120kPa/125kPa；The import humidity of air/hydrogen gas is controlled in 80%RH.As seen from the figure, monocell average voltage is specified
Current density during point (i.e. 0.65V) is 750mA/cm2, maximum power density 820mW/cm2, corresponding highest current density
For 1600mA/cm2。
Figure 13 is the voltage block diagram of 15 monocells when monocell average voltage reaches rated point (0.65V).By scheming
As it can be seen that single cell consistency is good, standard deviation 7.3mV.
Embodiment 4-6
It is different with embodiment 1, in the present embodiment, the areas of air import/export 6 and air flow field channels 8 it
Than being respectively 8.5%, 15% and 20%.
Embodiment 7-9
It is different with embodiment 1, in the present embodiment, hydrogen import/export 5 and the area ratio of hydrogen flow field channel 10
Respectively 3.5%, 6% and 8.5%.
Embodiment 10-12
It is different with embodiment 1, in the present embodiment, cooling water import/export 3 and the face of cooling water flow channel 12
The ratio between product is respectively 3.2%, 5.6% and 7.3%.
Embodiment 13-15
Different with embodiment 1, in the present embodiment, on cathode plate, the groove depth g of air flow field channels 8 is respectively
0.4mm, 0.45mm and 0.5mm, the ratio a/b of the groove width a of air flow field channels 8 and the width b of its back be respectively 0.8,1 and
1.2。
Embodiment 16-18
Different with embodiment 1, in the present embodiment, on anode plate, the groove depth h of hydrogen flow field channel 10 is respectively
0.3mm, 0.35mm and 0.4mm, the ratio c/d of the groove width c of the hydrogen flow field channel 10 and width d of its back is respectively 0.8,1
With 1.2.
Embodiment 19-21
It is different with embodiment 1, in the present embodiment, the groove depth i of cooling water flow channel 12 be respectively 0.2mm,
The ratio e/f of 0.3mm and 0.4mm, the width e of cooling water flow channel 12 and the width f of its back be respectively 3.0,4.5 and
6.0。
It is understood that the above description of the embodiments is intended to facilitate those skilled in the art and using practicality
It is novel.Person skilled in the art obviously can easily make these embodiments various modifications, and illustrating herein
General Principle be applied in other embodiment without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope made and
Modification should be all within the protection scope of the utility model.
Claims (9)
1. a kind of fuel battery double plates, which is characterized in that include the cathode plate and anode plate of the opposite connection in the back side, described the moon
The front of pole plate and anode plate is machined with respectively in the air flow field channels of ripple type and hydrogen flow field channel, in cathode plate and
Cooling water flow channel is machined between the back side of anode plate, being respectively provided with a pair connected on the cathode plate and anode plate is total to
Aquaporin is shared, and be respectively formed connection air flow field channels, hydrogen stream with air duct, a pair of shared hydrogen paths and a pair
Channel, cooling water flow channel entrance end air import/export, hydrogen import/export and cooling water import/export.
2. a kind of fuel battery double plates according to claim 1, which is characterized in that the cooling water flow channel adds
Work is in cathode back or anode back.
3. a kind of fuel battery double plates according to claim 1, which is characterized in that the air import/export, hydrogen
Import/export is covered with bridge piece in its junction respectively with air flow field channels and hydrogen flow field channel.
4. a kind of fuel battery double plates according to claim 1, which is characterized in that the cathode plate and anode plate point
Air side seal groove and hydrogen gas side seal groove are not equipped in its air side and hydrogen gas side, it is close in air side seal groove and hydrogen gas side
Elastic sealing element is respectively provided in sealing groove so that formed and closed air reaction chamber and hydrogen reaction chamber.
5. a kind of fuel battery double plates according to claim 1, which is characterized in that air import/export and air flow field
The area ratio of channel is between 8.5%~20%；
The groove depth g of air flow field channels meets：0.4≤g≤0.5mm, the groove width a of air flow field channels and the width b of its back
Ratio meet：0.8≤a/b≤1.2.
6. a kind of fuel battery double plates according to claim 1, which is characterized in that hydrogen import/export and hydrogen flow field
The area ratio of channel is between 3.5%~8.5%；
The groove depth h of hydrogen flow field channel meets：0.3≤h≤0.4mm, the groove width c of hydrogen flow field channel and the width d of its back
Ratio meet：0.8≤c/d≤1.2.
7. a kind of fuel battery double plates according to claim 1, which is characterized in that cooling water import/export and cooling water
The area ratio of flow field channel must be between 3.2%~7.3%；
The groove depth i of cooling water flow channel meets：0.2≤i≤0.4mm, the width e of cooling water flow channel and the width of its back
The ratio for spending f meets：3.0≤e/f≤6.0.
8. a kind of fuel battery double plates according to claim 1, which is characterized in that on the cathode plate and anode plate
Outer positioning groove that is corresponding equipped with position and being located at its side edge respectively and the interior location hole positioned at its four corners.
9. a kind of fuel battery double plates according to claim 1, which is characterized in that the cathode plate and anode plate is equal
Hydrophilic treated is carried out, and contact angle θ of the water on its surface is met：0°≤θ≤45°.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899562A (en) * | 2018-07-09 | 2018-11-27 | 北京氢璞创能科技有限公司 | A kind of fuel battery double plates |
| CN109818019A (en) * | 2019-03-05 | 2019-05-28 | 大连交通大学 | Gas diffusion layers band flow field membrane electrode assembly and its mating dual-electrode plates preparation method |
| CN110098414A (en) * | 2019-06-06 | 2019-08-06 | 新源动力股份有限公司 | A kind of encapsulating structure of fuel battery double plates and fuel cell pile |
| CN112736263A (en) * | 2020-12-25 | 2021-04-30 | 新源动力股份有限公司 | Preparation method of bipolar plate for optimizing drainage capacity of fuel cell |
| CN113471466A (en) * | 2021-06-18 | 2021-10-01 | 浙江氢谷智能装备科技有限公司 | Fuel cell |
| CN113546582A (en) * | 2021-06-02 | 2021-10-26 | 武汉氢能与燃料电池产业技术研究院有限公司 | Hydrogen-oxygen composite reactor |
| CN114566668A (en) * | 2022-03-01 | 2022-05-31 | 山东济燃氢动力有限公司 | Metal bipolar plate of hydrogen fuel cell |
| US20220178870A1 (en) * | 2020-12-08 | 2022-06-09 | Doosan Fuel Cell America, Inc. | Hydrogen concentration sensor |
| US11768186B2 (en) | 2020-12-08 | 2023-09-26 | Hyaxiom, Inc. | Hydrogen concentration sensor |
| US11824238B2 (en) | 2019-04-30 | 2023-11-21 | Hyaxiom, Inc. | System for managing hydrogen utilization in a fuel cell power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108899562A (en) * | 2018-07-09 | 2018-11-27 | 北京氢璞创能科技有限公司 | A kind of fuel battery double plates |
| CN108899562B (en) * | 2018-07-09 | 2021-08-10 | 北京氢璞创能科技有限公司 | Bipolar plate of fuel cell |
| CN109818019A (en) * | 2019-03-05 | 2019-05-28 | 大连交通大学 | Gas diffusion layers band flow field membrane electrode assembly and its mating dual-electrode plates preparation method |
| CN109818019B (en) * | 2019-03-05 | 2021-05-18 | 大连交通大学 | Gas diffusion layer membrane electrode assembly with flow field and preparation method of matched bipolar plate thereof |
| US11824238B2 (en) | 2019-04-30 | 2023-11-21 | Hyaxiom, Inc. | System for managing hydrogen utilization in a fuel cell power plant |
| CN110098414A (en) * | 2019-06-06 | 2019-08-06 | 新源动力股份有限公司 | A kind of encapsulating structure of fuel battery double plates and fuel cell pile |
| CN110098414B (en) * | 2019-06-06 | 2024-04-02 | 新源动力股份有限公司 | Fuel cell bipolar plate and packaging structure of fuel cell stack |
| US20220178870A1 (en) * | 2020-12-08 | 2022-06-09 | Doosan Fuel Cell America, Inc. | Hydrogen concentration sensor |
| US11768186B2 (en) | 2020-12-08 | 2023-09-26 | Hyaxiom, Inc. | Hydrogen concentration sensor |
| CN112736263A (en) * | 2020-12-25 | 2021-04-30 | 新源动力股份有限公司 | Preparation method of bipolar plate for optimizing drainage capacity of fuel cell |
| CN113546582A (en) * | 2021-06-02 | 2021-10-26 | 武汉氢能与燃料电池产业技术研究院有限公司 | Hydrogen-oxygen composite reactor |
| CN113471466A (en) * | 2021-06-18 | 2021-10-01 | 浙江氢谷智能装备科技有限公司 | Fuel cell |
| CN113471466B (en) * | 2021-06-18 | 2024-04-12 | 浙江氢谷智能装备科技有限公司 | Fuel cell |
| CN114566668A (en) * | 2022-03-01 | 2022-05-31 | 山东济燃氢动力有限公司 | Metal bipolar plate of hydrogen fuel cell |
| CN114566668B (en) * | 2022-03-01 | 2024-01-30 | 山东济燃氢动力有限公司 | Metal bipolar plate of hydrogen fuel cell |
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