CN108767304A - A kind of hydrogen-oxygen fuel cell heap that drainage is good - Google Patents
A kind of hydrogen-oxygen fuel cell heap that drainage is good Download PDFInfo
- Publication number
- CN108767304A CN108767304A CN201810602456.3A CN201810602456A CN108767304A CN 108767304 A CN108767304 A CN 108767304A CN 201810602456 A CN201810602456 A CN 201810602456A CN 108767304 A CN108767304 A CN 108767304A
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- bipolar plates
- drainage
- end plate
- fuel cell
- runner
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Classifications
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a kind of good hydrogen-oxygen fuel cell heaps of drainage, include mainly first end plate, the second end plate, and the electrode assembly between first end plate and the second end plate, it offers respectively in first end plate and the second end plate and the gas access and gas vent that are connected to inside battery component；The outside of the electrode assembly coats diaphragm；The discharge structure being connected with electrode assembly by diaphragm is arranged in the both sides of electrode assembly, the both ends of discharge structure are connected with first end plate and the second end plate respectively.Beneficial effects of the present invention are：The present invention designs discharge structure, and the water reacted in runner field can be discharged rapidly, prevents the stability of water logging influence fuel cell in battery pile；Meanwhile pressure drop and the resistance of gas stream overcurrent place where Taoist rites are performed are also reduced, it ensure that reaction gas air inlet is smooth.
Description
Technical field
The present invention relates to field of fuel cell technology, and in particular to a kind of hydrogen-oxygen fuel cell heap that drainage is good.
Technical background
Hydrogen-oxygen fuel cell is a kind of novel, efficient, clean electricity generation system, and generating efficiency can reach 60% left side
The right side, and emission is water, there are no pollution to the environment.Currently, having become new energy neck to the research of hydrogen-oxygen fuel cell technology
The hot spot in domain.
Reaction product one of of the water as hydrogen-oxygen fuel cell has the performance of battery in the content of inside battery very big
It influences, to make the performance of fuel cell reach best, it is necessary to so that its internal material has suitable water content.However, due to
The defect of fuel cell channel structure and the variation of working condition, the water in fuel cell can not be discharged in time is more than
The suitable water content of material so that fuel battery performance declines.In order to improve the drainage performance of fuel cell, tradition passes through design
Various forms of bipolar plate runner shapes, such as serpentine flow path, the shapes such as X-shape runner and bionical runner improve to a certain degree
Battery draining.But only this technology of change flow channel shape is difficult to adapt to the variation of battery operating mode, the drainage performance of battery
It is unstable, seriously affect the working efficiency of battery.
Invention content
It is an object of the present invention in view of the deficiencies of the prior art, a kind of hydrogen-oxygen fuel cell heap that drainage is good is provided,
Solve the problems, such as the easy water logging in inside when existing fuel cell stack operation.
The technical solution adopted by the present invention is：A kind of hydrogen-oxygen fuel cell heap that drainage is good, mainly include first end plate,
Second end plate, and the electrode assembly between first end plate and the second end plate are opened respectively on first end plate and the second end plate
Equipped with the gas access and gas vent being connected to battery component inside；The outside of the electrode assembly coats diaphragm；In electrode
The both sides of component are arranged with the discharge structure being connected with electrode assembly by diaphragm, the both ends of discharge structure respectively with first end
Plate and the second end plate are connected.
By said program, the battery component includes multiple spaced apart bipolar plates and membrane electrode, the both ends of bipolar plates
Face is affixed with the end face of membrane electrode respectively；The end face of the bipolar plates is anode surface, and the other end of bipolar plates is cathode plane,
The membrane electrode is set between the cathode plane and the anode pole-face of another bipolar plates of one bipolar plates；The anode of the bipolar plates
Face is contacted with the anode gas diffusion layer outer surface of membrane electrode, the cathode plane of the bipolar plates and the cathode gas diffusion of membrane electrode
The fitting of layer outer surface；The anode surface of the bipolar plates is identical with cathode plane structure, respectively offers multiple runner shoulders, and adjacent two
It is runner between a runner shoulder, each runner is connected in end, and multiple runners form runner field, and runner field is equipped with entrance and exit；
Runner field on two end faces of the same bipolar plates is connected to by the entrance and exit of runner field.
By said program, it is respectively equipped with drainage groove in the both ends of the surface of bipolar plates, offers and arranges in the side of bipolar plates
The connection groove of water-bound connection, one end of the drainage groove are connected to the anode/cathode runner field of bipolar plates, drainage groove
The other end extend to the sides of bipolar plates, be connected to the cathode/anode runner field of bipolar plates by connecting groove.
By said program, water-absorbing core is equipped in the runner.
By said program, water-absorbing core is respectively embedded into connection groove and/or drainage groove；The diaphragm with connect groove
It is close to the water-absorbing core in drainage groove.
By said program, the discharge structure includes baffle, hollowed-out board and the porous layer that ecto-entad is bonded successively, described
Porous layer is connected by diaphragm with the outside of bipolar plates.
By said program, the diaphragm is connected with the connection groove and drainage groove of bipolar plates, and with drainage groove and
Connect the water-absorbing core contact in groove.
By said program, drainage channel is offered on the inside of the baffle, drainage channel is equipped with dry gas inlet and goes out
The mouth of a river；The drainage channel is connected to by hollowed-out board, porous layer and diaphragm with groove is connect.
By said program, multiple flowing holes are provided on the hollowed-out board.
Beneficial effects of the present invention are：
1. the water reacted in runner field, can be discharged rapidly, prevent water logging shadow in battery pile by present invention design discharge structure
Ring the stability of fuel cell；Meanwhile pressure drop and the resistance of gas stream overcurrent place where Taoist rites are performed are also reduced, it ensure that reaction gas air inlet
It is smooth；
2. offering drainage channel on the inside of the baffle of discharge structure, it is passed through dry gas in drainage channel, can accelerate
The discharge of water enhances the drainage performance of fuel cell；
3. bipolar plates connect groove and drainage groove structure design form, reduces bipolar plate structure and rigidly lose, simultaneously
The difficulty of processing of bipolar plates is unlikely to too high；
4. being respectively embedded into water-absorbing core in the runner field of bipolar plates, connection groove and drainage groove, pass through the dry gas of adjusting
The flow of body adjusts gas and flows through the water that water-absorbing core is taken away, to adapt to draining of the fuel cell in different work condition states
Performance；
5. battery component is sealed by diaphragm material, it can prevent the gas of inside battery from being leaked by water-absorbing core material；
6. structure of the invention reasonable design, feasibility is good, and stability is high.
Description of the drawings
Fig. 1 is the overall schematic of a specific embodiment of the invention.
Fig. 2 is the installation diagram of the present embodiment.
Fig. 3 is the side structure sectional view of the present embodiment.
Fig. 4 is the structural schematic diagram of bipolar plates in the present embodiment.
Fig. 5 is the sectional view of bipolar plates in the present embodiment.
Fig. 6 is the bipolar plates plan view of embedded water-absorbing core.
Fig. 7 is the sectional schematic diagram of runner in the present embodiment.
Fig. 8 is the bipolar plates sectional view of embedded water-absorbing core in the present embodiment.
Fig. 9 is baffle inside structure schematic diagram in the present embodiment.
Figure 10 is the structural schematic diagram of hollowed-out board in the present embodiment.
Figure 11 is that reacting fluid flows to schematic diagram in the present embodiment.
Specific implementation mode
For a better understanding of the present invention, the present invention is further described in the following with reference to the drawings and specific embodiments.
A kind of good hydrogen-oxygen fuel cell heap of drainage as shown in Figures 1 to 3 includes mainly first end plate 1, the second end plate
17, and (first end plate 1 and the second end plate 14 clamp, and lead to for electrode assembly between first end plate 1 and the second end plate 17
Cross and be bolted fixation), it offers respectively in first end plate 1 and the second end plate 14 and the gas access that is connected to inside battery component
And gas vent；The outside of the electrode assembly coats diaphragm 5, and the battery component is sealed by diaphragm 5；In electrode assembly
Both sides are arranged with the discharge structure being connected with electrode assembly by diaphragm 5, the both ends of discharge structure respectively with first end plate 1
It is in contact with the second end plate 17, is bolted on the both sides of battery component.
In the present embodiment, the battery component includes multiple spaced apart bipolar plates 6 and membrane electrode 7, and the two of bipolar plates 6
End face of the end face respectively with membrane electrode 7 is affixed；As shown in Fig. 4~8, the end face of the bipolar plates 6 is anode surface, bipolar plates 6
Other end be cathode plane, the film is set between the cathode plane and the anode pole-face of another bipolar plates 6 of a bipolar plates 6
Electrode 7；The anode surface of the bipolar plates 6 is contacted with the anode gas diffusion layer outer surface of membrane electrode 7, the moon of the bipolar plates 6
Pole-face is bonded with the cathode gas diffusion layer outer surface of membrane electrode 7.In the present embodiment, the anode surface and cathode of the bipolar plates 6
Face structure is identical, respectively offers multiple parallel runner shoulders 12, is runner 9, each runner between two neighboring runner shoulder 12
9 are connected in end, and multiple runners 9 form runner field, and runner field is equipped with entrance and exit；On 6 two end faces of the same bipolar plates
Runner field be connected to by the entrance and exit of runner field.The structure of above-mentioned bipolar plates 6 and membrane electrode 7 is the prior art,
Which is not described herein again.
Preferably, it is respectively equipped with drainage groove 10 in the both ends of the surface of bipolar plates 6, offers and arrange in the side of bipolar plates 6
The connection groove 11 of water-bound connection, one end of the drainage groove 10 are connected to the anode/cathode runner field of bipolar plates 6, are arranged
The other end of water groove 10 extends to the side of bipolar plates 6, by the cathode/anode runner field for connecting groove 11 and bipolar plates 6
Connection.Preferably, water-absorbing core 13 is equipped in the runner 9；It is respectively embedded into connection groove 11 and/or drainage groove 10
Water-absorbing core 13, water-absorbing core 13 is made of Nafion films or other are made similar to porous material；The diaphragm 5 with connect groove
11 and drainage groove 10 in water-absorbing core 13 be close to, prevent the reaction gas inside battery component from being leaked by water-absorbing core 13.
In the present invention, the discharge structure includes baffle 2, hollowed-out board 3 and the porous layer 4 that ecto-entad is bonded successively, institute
It states porous layer 4 by diaphragm 5 to be connected with the outside of bipolar plates 6, and is connected with the connection groove 11 of bipolar plates 6 and drainage groove 10
It is logical, specifically contacted with the water-absorbing core 13 in embedded drainage groove 10 and connection groove 11；As shown in figure 9, the inside of the baffle 2
Drainage channel 15 is offered, drainage channel 15 is equipped with dry gas inlet 14 and water outlet；The drainage channel 15 passes through hollow out
Plate 3, porous layer 4 and diaphragm 5 are connected to groove 11 is connect.In the present embodiment, the baffle 2, hollowed-out board and porous layer 4 pass through
It is bolted, three edge correspondence opens up multiple bolts hole 8.As shown in Figure 10, multiple flowing holes are provided on the hollowed-out board 3
16, the moisture being discharged from drainage groove 10 and connection groove 11 enters 15 heel row of drainage channel of 2 inside of baffle through flowing hole 16
Go out；The hollowed-out board 3 is close to porous layer 4, plays a supporting role in protection.
In the present invention, it is passed through humidification hydrogen into the gas access of the first end plate 1 of the fuel cell pack, to second end
Humidification oxygen is passed through in the gas access of plate 14 (solid line as shown in Figure 11 flows to for hydrogen, and dotted line flows to for oxygen).Hydrogen
For air-flow through bipolar plates 6-7, hydrogen partial enters the cathode flow channels field 6-7 (a) of bipolar plates 6-7, the gas being then passed through in membrane electrode 7
Diffusion layer reaches Catalytic Layer, and betatopic becomes hydrogen ion, and hydrogen ion enters cathode through film, have neither part nor lot in the hydrogen of reaction from
The outlet of cathode flow channels field is discharged；Another part gas enters next bipolar plates 6-6 by the aperture on membrane electrode 7, together
Sample, a part of hydrogen enter cathode flow channels field 6-6 (a), and the hydrogen for having neither part nor lot in reaction is arranged from the outlet of cathode flow channels field 6-6 (a)
Go out, another part hydrogen enters bipolar plates 6-5, carries out successively, and hydrogen can finally enter the cathode flow channels field of outermost layer bipolar plates
6-2 (a), the hydrogen for having neither part nor lot in reaction are discharged by the outlet of cathode flow channels field 6-2 (a).Equally, oxygen flows through bipolar plates 6-
1, a part of hydrogen enters anode stream place where Taoist rites are performed 6-1 (b), passes through the gas diffusion layers in membrane electrode 7, reaches Catalytic Layer, obtains electronics
Water is generated with hydrogen ion, the oxygen for having neither part nor lot in reaction is discharged from the outlet of anode stream place where Taoist rites are performed, and another part gas passes through membrane electrode 7
On aperture enter next bipolar plates 6-2, according to this, oxygen finally can enter outermost layer anode stream place where Taoist rites are performed 6-6 (b), do not join
It is discharged by the outlet of runner 6-6 (b) with the oxygen reacted.
The operation principle of the present invention is that：The moisture that hydrogen and oxygen reaction generate, with gas in the runner field of bipolar plates 6
When flowing through the water-absorbing core 13 of embedded runner 9, part water is adsorbed, and the water of absorption is transferred to the suction being embedded into drainage groove 10 again
Water core 13, then be transferred to be embedded into connection groove 11 in water-absorbing core 13, through after diaphragm 5 successively through porous layer 4 and hollowed-out board
3, it is discharged after reaching the drainage channel 15 of baffle 12；And air is difficult to penetrate diaphragm 5, to ensure that the gas inside battery pile is let out
Leakage.It is passed through dry gas (gas flow can change according to actual conditions) in the dry gas inlet 14 of baffle 2, water can be accelerated
Discharge, improve the drainage performance of battery pile.
Finally it should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although
With reference to embodiment, invention is explained in detail, for those skilled in the art, still can be to aforementioned
Technical solution recorded in each embodiment is modified or equivalent replacement of some of the technical features, but it is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (9)
1. a kind of good hydrogen-oxygen fuel cell heap of drainage, which is characterized in that mainly including first end plate, the second end plate, and
It is offered respectively on electrode assembly between first end plate and the second end plate, first end plate and the second end plate and battery component
The gas access of inside connection and gas vent；The outside of the electrode assembly coats diaphragm；It is symmetrical in the both sides of electrode assembly
Equipped with the discharge structure being connected with electrode assembly by diaphragm, the both ends of discharge structure respectively with first end plate and the second end plate phase
Even.
2. the good hydrogen-oxygen fuel cell heap of drainage as described in claim 1, which is characterized in that the battery component includes more
The both ends of the surface of a spaced apart bipolar plates and membrane electrode, bipolar plates are affixed with the end face of membrane electrode respectively；The bipolar plates
End face is anode surface, and the other end of bipolar plates is cathode plane, the cathode plane of a bipolar plates and the sun of another bipolar plates
The membrane electrode is set between the pole-face of pole；The anode surface of the bipolar plates and the anode gas diffusion layer outer surface of membrane electrode connect
It touches, the cathode plane of the bipolar plates is bonded with the cathode gas diffusion layer outer surface of membrane electrode；The anode surface of the bipolar plates and
Cathode plane structure is identical, respectively offers multiple runner shoulders, is runner between two neighboring runner shoulder, and each runner connects in end
Logical, multiple runners form runner field, and runner field is equipped with entrance and exit；Runner field on two end faces of the same bipolar plates passes through
The entrance and exit of runner field is connected to.
3. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 2, which is characterized in that in the both ends of the surface point of bipolar plates
Not She You drainage groove, offer the connection groove being connected to discharge structure in the side of bipolar plates, the one of the drainage groove
End is connected to the anode/cathode runner field of bipolar plates, and the other end of drainage groove extends to the side of bipolar plates, passes through connection ditch
Slot is connected to the cathode/anode runner field of bipolar plates.
4. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 3, which is characterized in that be equipped in the runner
Water-absorbing core.
5. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 3, which is characterized in that in connection groove and/or row
Water-absorbing core is respectively embedded into water groove；The diaphragm is close to the water-absorbing core in connection groove and drainage groove.
6. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 5, which is characterized in that the discharge structure include by
Baffle, hollowed-out board and the porous layer being bonded successively outside to inside, the porous layer are connected by diaphragm with the outside of bipolar plates.
7. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 6, which is characterized in that the diaphragm and bipolar plates
Connection groove is connected with drainage groove, and is contacted with the water-absorbing core in drainage groove and connection groove.
8. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 5, which is characterized in that opened up on the inside of the baffle
There are drainage channel, drainage channel to be equipped with dry gas inlet and water outlet；The drainage channel by hollowed-out board, porous layer and every
Film is connected to groove is connect.
9. the good hydrogen-oxygen fuel cell heap of drainage as claimed in claim 6, which is characterized in that be provided on the hollowed-out board more
A flowing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602456.3A CN108767304B (en) | 2018-06-12 | 2018-06-12 | Hydrogen-oxygen fuel cell stack with good water drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602456.3A CN108767304B (en) | 2018-06-12 | 2018-06-12 | Hydrogen-oxygen fuel cell stack with good water drainage |
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| Publication Number | Publication Date |
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| CN108767304A true CN108767304A (en) | 2018-11-06 |
| CN108767304B CN108767304B (en) | 2021-03-23 |
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| CN201810602456.3A Active CN108767304B (en) | 2018-06-12 | 2018-06-12 | Hydrogen-oxygen fuel cell stack with good water drainage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109494385A (en) * | 2018-12-07 | 2019-03-19 | 武汉理工大学 | A kind of monocell and proton exchange film fuel cell electric piling structure in chiasma type flow field |
| CN111092245A (en) * | 2019-12-31 | 2020-05-01 | 上海神力科技有限公司 | Fuel cell stack and system, fuel cell vehicle and water management method thereof |
| CN111177920A (en) * | 2019-12-27 | 2020-05-19 | 武汉中极氢能产业创新中心有限公司 | Design method and terminal of fuel cell flow channel |
| CN112928308A (en) * | 2021-03-31 | 2021-06-08 | 华中科技大学 | Fuel cell bipolar plate for dehumidification and fuel cell stack thereof |
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| CN109494385A (en) * | 2018-12-07 | 2019-03-19 | 武汉理工大学 | A kind of monocell and proton exchange film fuel cell electric piling structure in chiasma type flow field |
| CN111177920A (en) * | 2019-12-27 | 2020-05-19 | 武汉中极氢能产业创新中心有限公司 | Design method and terminal of fuel cell flow channel |
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| CN112928308A (en) * | 2021-03-31 | 2021-06-08 | 华中科技大学 | Fuel cell bipolar plate for dehumidification and fuel cell stack thereof |
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|---|---|
| CN108767304B (en) | 2021-03-23 |
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