CN201498551U - Metal bipolar plate of air cooling type fuel cell stack - Google Patents
Metal bipolar plate of air cooling type fuel cell stack Download PDFInfo
- Publication number
- CN201498551U CN201498551U CN2009202348536U CN200920234853U CN201498551U CN 201498551 U CN201498551 U CN 201498551U CN 2009202348536 U CN2009202348536 U CN 2009202348536U CN 200920234853 U CN200920234853 U CN 200920234853U CN 201498551 U CN201498551 U CN 201498551U
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- plate
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- fuel cell
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- cell stack
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model is an improvement of a metal bipolar plate of a proton exchange membrane fuel cell. The metal bipolar plate is characterized in that a cathode plate and an anode plate which are punched with flow field are backward overlapped; the periphery of the metal bipolar plate is sealed by means of welding or bonding; and the backward overlapped face of the two bipolar plate forms into a cooling medium passageway. Therefore, the flow fields at the two faces of a monopole plate are utilized, the cooling medium passageway is increased, good cooling effect can be obtained even under lower wind pressure, the requirement for cooling the air of the low-wind pressure electric pile, the cooling flow field is not needed to be additionally added, and the density of the volume power of the electric pile is improved.
Description
Technical field
Utility model is the improvement to dual polar plates of proton exchange membrane fuel cell, relates in particular to a kind of metal double polar plates that is used in particular for the Luftgekuhlte rotierende pile.
Background technology
Proton Exchange Membrane Fuel Cells, single-unit operating voltage only are 0.6～0.7V, obtain useful voltage, the more piece monocell must be connected.Connect two adjacent cell partition and be called bipolar plates, bipolar plates not only need in pile electrode that reactant is provided and between adjacent two electrodes conduction current, but also undertaking the effect that battery generates water and reaction heat of discharging.Good bipolar plates must have good conductivity (〉=10scm
-1), conductive coefficient (〉=20Wcm
-1K
-1) and air-tightness (＜10
-4Mbarcm
3s
-1Cm
-2).And inside battery is a sour environment, needs the corrosion resistance under acid aqueous vapor, oxygen and heat condition; Simultaneously, be to reduce the pile cost, improve power density, bipolar plates requires also that material is cheap, processing cost is low and the little lightweight characteristics of volume.
At present, bipolar plates mainly contains carbon/graphite bi-polar plate, composite dual-electrode plates and metal double polar plates.Metal double polar plates is because of having favorable conductive, thermal conduction characteristic, pliability and workability, comes into one's own and pays close attention to.Compare with composite material with graphite, there is not the air-tightness problem in metal, even and metallic plate is made and very thinly also can be guaranteed excellent mechanical intensity, thereby can greatly reduce the pile volume and weight, simultaneously because metal has high thermal, pile internal temperature gradient is little, also helps improving the uniformity of pile internal temperature.Therefore utilize sheet metal for example the corrosion resistant plate punch forming prepare bipolar plates, be to study focus in recent years.
Yet existing metal double polar plates, the coolant flow field is for mostly being serpentine flow, and for example Chinese patent CN1416184A is described.The serpentine flow fluid resistance is fallen bigger, and air cooling pile, cooling wind pressure are less relatively, and fluid resistance is fallen greatly, and then gas flow is little, and cooling effect is not good, can not be used for the Luftgekuhlte rotierende pile substantially, so substantially all be to be used for making coolant with water.
The disclosed stamped metal bipolar plates of Chinese patent CN1787261, the bipolar plates positive and negative is symmetrically arranged with fuel gas channel, oxidizer gas channel, coolant guiding channel and bipolar plate flow field district respectively, the equal parallel flow field of its positive and negative.The disclosed metal double polar plates of Chinese patent CN101290994, its structure is filled with the water flow field stretching wire netting as heat extraction for be provided with the water frame towards between the metal anode unipolar plate that parallel flow field is arranged, metallic cathode unipolar plate in the water frame.Above-mentioned two patents have only been utilized metallic plate one side runner, and coolant flow field needs extra the interpolation, has increased cost, and also having increased assembled battery has thickness, cause volumetric power density to descend.And cooling agent and air flow channel adopt interior common conduit form, can't be applied to the air-cooled pile of fan cooled and air feed.
The disclosed thin metal dual-pole board of proton exchange film fuel battery of Chinese patent CN1996647, though between the yin, yang pole plate, omit coolant flow field, reduced package thickness, yet the cathode and anode flow field has only utilized a side runner, cathode flow field both as the reaction gas runner also as the cold gas runner, though can be used for the Luftgekuhlte rotierende pile, because shared flow field causes cooling effect not good.
Above-mentioned deficiency still has is worth improved place.
The utility model content
The utility model purpose is to overcome the deficiency of above-mentioned prior art, provides a kind of and can utilize the two sides runner simultaneously, and refrigerating gas has independent runner, the metal bipolar plate of air-cooling type fuel cell stack of good cooling results.
The utility model purpose realizes, the main improvement is the parallel longitudinal flow field positive plate (hydrogen unipolar plate) that utilizes punching press to have the flat shape flow field minus plate (oxygen unipolar plate) of lateral direction penetrating and serpentine flow or two ends to compile, form bipolar plates back to welding or bonding, two center-aisles are as the refrigerating gas runner, thereby increased independent coolant runner under the thickness condition not increasing, improve cooling effect, thereby gone for the Luftgekuhlte rotierende pile of low blast, realized the utility model purpose.Specifically, the utility model metal bipolar plate of air-cooling type fuel cell stack, the flat shape of the lateral direction penetrating flow field minus plate that comprises metal stamping, compile the parallel flow field positive plate with serpentine flow or two ends, it is characterized in that the yin, yang polar plate flow field is superimposed dorsad, side face is by welding or being bonded and sealed, and the two poles of the earth backboard closes face and constitutes coolant guiding channel.
In the utility model
The stamped metal plate substrate is same as the prior art, can be stainless steel, titanium material and thin plates such as titanium alloy, aluminium and aluminium alloy.Base material thickness is usually about 0.1-1mm.The unipolar plate flow field degree of depth 0.1～4mm, width are 0.1～3mm.
The pole plate punching press forms the alternate concavo-convex width in flow field, can be wide, can be not wide yet, utility model especially with employing make reaction gas flow field width degree greater than coolant flow field width structure for well, help the reacting gas that provides enough.
The flow field that punching press forms, its boss can be continuous, also can be interrupted.Wherein minus plate better adopts the parallel flow field of boss continuous structure, helps passing through fast of coolant, to improve cooling effect; Positive plate better adopts the boss intermittent configuration, helps increasing the response area in the closed flow.
Minus plate and positive plate are superimposed dorsad, a kind ofly more preferably make two runner direction quadratures on the flow field plate, promptly cloudy unipolar plate runner direction is vertical with positive unipolar plate runner direction, and the air flow channel that this structure forms is short, help passing through fast of cooling air, help improving cooling effect.
In addition, for reducing the decay resistance under metallic plate contact resistance and the raising battery context, unipolar plate is after punch forming, can adopt surface treatment mode, carrying out good electricity leads with the corrosion resistant coating and handles, technology such as chemical plating, plating and PVD, ion injection for example, carrying out in the surface plating has modified layer, for example noble metal, titanium nitride or titanium carbide, ambrose alloy phosphorus, CrxN layer etc.
The utility model metal bipolar plate of air-cooling type fuel cell stack, owing to adopt two pole plate combinations dorsad of punching press runner, spatial channel constitutes the coolant flow field channel dorsad, make flow field, unipolar plate two sides all obtain utilization, increased the coolant runner, make under low blast, still can obtain better cooling effect, can satisfy low blast pile air cooling requirement.Though the hydrogen gas side coolant flow channel is not communicated with, there is temperature gradient in pile inside, can form free convection, and therefore sealing flow field coolant still can also have certain radiating effect because of the temperature difference flows.Cloudy unipolar plate adopts the flat shape of punching press lateral direction penetrating flow field, and flow channel length is short, and flow passage resistance force of waterproof is little; Parallel longitudinal flow field boss intermittent configuration is compiled at positive plate serpentine flow or two ends, has increased the hydrogen reaction area, helps improving battery performance.Cloudy unipolar plate runner direction is vertical with positive unipolar plate runner direction, and coolant flow channel is short, helps improving cooling effect.Two pole plate monolithics are suppressed combination respectively, and hydrogen, oxygen unipolar plate flow field can be optimized respectively as required, more help the optimization of pile flow field structure.Do not need the volume place to increase coolant flow field, improved the volumetric power density of pile.
Below in conjunction with two exemplary embodiments; utility model is further understood in exemplary illustration and help; but the embodiment detail only is for utility model is described; do not represent utility model design whole technical schemes down; therefore should not be construed as qualification to the total technical scheme of utility model; some are In the view of the technical staff; the unsubstantiality that does not depart from the utility model design increases and/or change; for example change or replace, all truely use novel protected scope so that technical characterictic with same or similar technique effect is simple.
Description of drawings
Fig. 1 is a boss continuous anode plate Facad structure schematic diagram.
Fig. 2 is Figure 1A-A cross-sectional view.
Fig. 3 is the continuous minus plate Facad structure of a boss schematic diagram.
Fig. 4 is Fig. 3 A-A cross-sectional view.
Fig. 5-1 is the continuous bipolar plates combining structure of boss generalized section (Figure 1B-B position).
Fig. 5-2 is the continuous bipolar plates combining structure of boss generalized section (Fig. 1 C-C position).
Fig. 6 is interrupted positive plate Facad structure schematic diagram for boss.
Fig. 7 is Fig. 6 A-A cross-sectional view.
Fig. 8 is interrupted minus plate Facad structure schematic diagram for boss.
Fig. 9 is Fig. 8 A-A cross-sectional view.
Figure 10 is that continuous minus plate of boss and boss are interrupted positive plate package assembly schematic diagram.
Embodiment
Embodiment 1: referring to Fig. 1-5, with bipolar plates 0.1mm stainless sheet steel, punching press has the continuous parallel flow field minus plate 1 of wide boss respectively, flow field degree of depth 1mm, width 1mm, with the continuous serpentine flow positive plate 2 of wide boss (degree of depth, width the same), carry out electroplate by electro-plating method respectively, combination is welded in both flow fields dorsad.Zone A constitutes the reaction air flow channel, and area B constitutes the hydrogen runner, and zone C and D constitute the cooling air runner.
Embodiment 2: referring to Fig. 3,4,6,7,10, with the bipolar plates stainless sheet steel, punching press has the continuous parallel flow field minus plate 1 of wide boss respectively, serpentine flow positive plate 4 with wide boss interruption, form titanium nitride layer by the PVD method on the surface respectively, combination is welded in both flow fields dorsad.Area E constitutes the reaction air flow channel, and regional F constitutes the hydrogen runner, and regional G and H constitute the cooling air runner.
In addition, cloudy unipolar plate also can strike out boss intermittent configuration (Fig. 8,9), with the serpentine flow positive plate 4 that boss is interrupted, welding combination dorsad.Though its coolant flow channel is discontinuous, increased reaction gas runner area, also can improve cooling effect.
To those skilled in the art; under this patent design and specific embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; those of ordinary skills will recognize also can adopt additive method; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; for example runner width changes; the runner variation; the pole plate base material changes; or the like unsubstantiality change, can be employed equally, can both realize and basic identical function of the foregoing description and effect; no longer one launch for example to describe in detail, all belong to this patent protection range.
Claims (7)
1. metal bipolar plate of air-cooling type fuel cell stack, the flat shape of the lateral direction penetrating flow field minus plate that comprises metal stamping, compile the parallel flow field positive plate with serpentine flow or two ends, it is characterized in that the yin, yang polar plate flow field is superimposed dorsad, side face is by welding or being bonded and sealed, and the two poles of the earth backboard closes face and constitutes coolant guiding channel.
2. according to the described metal bipolar plate of air-cooling type fuel cell stack of claim 1, it is characterized in that the unipolar plate flow field degree of depth 0.1～4mm, width is 0.1～3mm.
3. according to claim 1 or 2 described metal bipolar plate of air-cooling type fuel cell stack, it is characterized in that the reactive flowfield width is greater than coolant flow field width on the pole plate.
4. according to claim 1 or 2 described metal bipolar plate of air-cooling type fuel cell stack, it is characterized in that minus plate is the continuous parallel flow field of boss, positive plate is boss intermittent configuration flow field.
5. according to claim 1 or 2 described metal bipolar plate of air-cooling type fuel cell stack, it is characterized in that minus plate runner direction is vertical with positive plate plate runner direction when superimposed.
6. according to claim 1 or 2 described metal bipolar plate of air-cooling type fuel cell stack, it is characterized in that the unipolar plate punch forming after surface conductivity and corrosion resistance modification, superimposed again combination.
7. according to claim 1 or 2 described metal bipolar plate of air-cooling type fuel cell stack, it is characterized in that two metal polar plates are by the welding combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202348536U CN201498551U (en) | 2009-08-09 | 2009-08-09 | Metal bipolar plate of air cooling type fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202348536U CN201498551U (en) | 2009-08-09 | 2009-08-09 | Metal bipolar plate of air cooling type fuel cell stack |
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| Publication Number | Publication Date |
|---|---|
| CN201498551U true CN201498551U (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202348536U Expired - Fee Related CN201498551U (en) | 2009-08-09 | 2009-08-09 | Metal bipolar plate of air cooling type fuel cell stack |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022511A (en) * | 2012-12-20 | 2013-04-03 | 华南理工大学 | Fuel cell bipolar plate with wave-shaped structure and manufacturing method |
| CN104091956A (en) * | 2014-07-21 | 2014-10-08 | 江苏超洁绿色能源科技有限公司 | Regional and high-power air cooling type proton exchange membrane fuel cell (PEMFC) electric pile bipolar plate with counter-flow channel |
| CN108134110A (en) * | 2017-12-28 | 2018-06-08 | 东莞北京航空航天大学研究院 | Fuel battery double plates and its fuel cell and air cooling system |
| CN109755610A (en) * | 2019-03-15 | 2019-05-14 | 郑州正方科技有限公司 | Closed air-cooled fuel cell |
| CN110137528A (en) * | 2019-05-08 | 2019-08-16 | 珠海格力电器股份有限公司 | Cathode plate, bipolar plates, fuel cell pile, power assembly and the vehicles |
| WO2021072676A1 (en) * | 2019-10-16 | 2021-04-22 | 未势能源科技有限公司 | Fuel cell |
-
2009
- 2009-08-09 CN CN2009202348536U patent/CN201498551U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022511A (en) * | 2012-12-20 | 2013-04-03 | 华南理工大学 | Fuel cell bipolar plate with wave-shaped structure and manufacturing method |
| CN103022511B (en) * | 2012-12-20 | 2015-04-22 | 华南理工大学 | Fuel cell bipolar plate with wave-shaped structure and manufacturing method |
| CN104091956A (en) * | 2014-07-21 | 2014-10-08 | 江苏超洁绿色能源科技有限公司 | Regional and high-power air cooling type proton exchange membrane fuel cell (PEMFC) electric pile bipolar plate with counter-flow channel |
| CN108134110A (en) * | 2017-12-28 | 2018-06-08 | 东莞北京航空航天大学研究院 | Fuel battery double plates and its fuel cell and air cooling system |
| CN109755610A (en) * | 2019-03-15 | 2019-05-14 | 郑州正方科技有限公司 | Closed air-cooled fuel cell |
| CN110137528A (en) * | 2019-05-08 | 2019-08-16 | 珠海格力电器股份有限公司 | Cathode plate, bipolar plates, fuel cell pile, power assembly and the vehicles |
| CN110137528B (en) * | 2019-05-08 | 2021-07-23 | 珠海格力电器股份有限公司 | Negative plate, bipolar plate, fuel cell stack, power assembly and vehicle |
| WO2021072676A1 (en) * | 2019-10-16 | 2021-04-22 | 未势能源科技有限公司 | Fuel cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20160809 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |