CN108400366A - Sealing structure and flow battery comprising it - Google Patents
Sealing structure and flow battery comprising it Download PDFInfo
- Publication number
- CN108400366A CN108400366A CN201810195301.2A CN201810195301A CN108400366A CN 108400366 A CN108400366 A CN 108400366A CN 201810195301 A CN201810195301 A CN 201810195301A CN 108400366 A CN108400366 A CN 108400366A
- Authority
- CN
- China
- Prior art keywords
- seal groove
- sealing
- diaphragm
- sealing strip
- sealing structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 127
- 230000013011 mating Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 32
- 239000003792 electrolyte Substances 0.000 abstract description 9
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 229910052720 vanadium Inorganic materials 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
- H01M8/0293—Matrices for immobilising electrolyte solutions
-
- 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 present invention provides a kind of sealing structure and include its flow battery, the sealing structure includes diaphragm, the first seal groove, the second seal groove, the first sealing strip, the second sealing strip, first seal groove, the second seal groove are located in sealing mating surface, first seal groove, the second seal groove are mutually parallel, first sealing strip is filled in the first seal groove, and the second sealing strip is filled in the second seal groove；Diaphragm is extended to from the side of the first seal groove between the first sealing strip, the first seal groove, then is stretched out and be covered on the second seal groove from the other side of the first seal groove, and the second sealing strip is between the second seal groove and diaphragm.The sealing structure and flow battery comprising it, can effectively increase the leakage resistance of electrolyte, prevent pile from leaking outside；The shearing force that diaphragm is subject in stress concentration is reduced, diaphragm can be protected to the maximum extent, increase the service life of diaphragm, reduce the manufacturing cost of flow battery.
Description
Technical field
The present invention relates to a kind of sealing structures.
The invention further relates to a kind of flow batteries including above-mentioned sealing structure.
Background technology
Along with regenerative resource, the accelerated development of distributed micro-grid and the wisdom energy, being promoted, regenerative resource is grid-connected
The energy storage technology to play a significant role in terms of rate, balance grid stability is more and more concerned.And in numerous large capacity energy storage skills
In art route, all-vanadium flow battery has been shown one's talent.
Compared with other energy storage technologies, all-vanadium flow battery energy storage technology is because its service life is long, scale is big, safe and reliable
Etc. advantage outstanding, become one of the one preferred technique of scale energy storage.All-vanadium flow battery have have extended cycle life, energy conversion effect
The advantages that rate is high, rated power and capacity are mutual indepedent, easy scale application；By replacing charged electrolyte, it can be achieved that " wink
Between recharge ", be one of the one preferred technique of intelligent grid energy storage；In wind energy, solar power station energy storage, user terminal peak regulation and intelligence
The various energy storage fields such as power grid energy storage, power supply from far-off regions, communication base station have extremely good application prospect, and by showing
Model has obtained the verification of application field, has started to replace plumbic acid in countries and regions such as Japan, Canada, the U.S., Australia
Battery.All-vanadium liquid flow energy storage system suffers from itself with entire electric system in matching, reliability, temperature window etc.
Advantage, at present flow battery technology get the nod in international market, will occupy in following energy storage market scale important
One seat.
As described above, the above advantage of all-vanadium flow battery makes it be more suitable for applying compared to other batteries and storing up on a large scale
Energy field, exactly because and the structure of this mobility proposes higher challenge to flow battery in seal aspect.And liquid stream
The sealing of battery will not only solve the problems, such as interior leakage (electrolyte inside mutual mixed), but also solve leakage (letting out outside pile
Leakage) problem.In addition to this, fluid cell electrolyte is generally acid medium, this also brings great limitation to selection aspect,
So how to ensure that flow battery solves interior leakage and problem of leakage in Life cycle, it is always for flow battery field
One no small challenge.
Invention content
The technical problem to be solved by the present invention is in order to overcome fluid cell electrolyte in the prior art be easy leakage
Defect, and provide a kind of sealing structure and the flow battery comprising it.
The present invention solves above-mentioned technical problem by the following technical programs：
The present invention provides a kind of sealing structure, the sealing structure is between the first deckle board, the second deckle board, and described
Surface of one deckle board towards second deckle board is sealing mating surface, and the sealing structure includes diaphragm, the first seal groove, second
Seal groove, the first sealing strip, the second sealing strip, first seal groove, the second seal groove are located in the sealing mating surface, institute
State the first seal groove, the second seal groove is mutually parallel, first sealing strip is filled in first seal groove, described second
Sealing strip is filled in second seal groove；The diaphragm extends to first sealing from the side of first seal groove
Between item, the first seal groove, then stretches out and be covered on second seal groove from the other side of first seal groove, it is described
Second sealing strip is between second seal groove and the diaphragm.
In the technical scheme, by being arranged the first sealing strip, the second sealing strip in the both sides of diaphragm so that the sealing
Structure can effectively seal against the first deckle board, the second deckle board, solve the problems, such as that the sealing reliability of traditional single track seal groove is poor.
Preferably, the section of first sealing strip is circle.
In the technical scheme, circular sealing strip can preferably coordinate with seal groove, and have distortion allowance；It is close
The influence to the mechanical property of diaphragm is reduced on the circular surface of strip of paper used for sealing, extends the service life of diaphragm.
Preferably, first sealing strip is protruding to outside the sealing mating surface.
In the technical scheme, when the second deckle board being made to be pressed on the first deckle board, the first sealing strip can be deformed slightly, ensure that
Sealing effect.
Preferably, the section of second sealing strip is circle.
In the technical scheme, circular sealing strip can preferably coordinate with seal groove, and have distortion allowance；It is close
The influence to the mechanical property of diaphragm is reduced on the circular surface of strip of paper used for sealing, extends the service life of diaphragm.
Preferably, second sealing strip is protruding to outside the sealing mating surface.
In the technical scheme, when the second deckle board being made to be pressed on the first deckle board, the second sealing strip can be deformed slightly, ensure that
Sealing effect.
Preferably, forming the first arc-shaped chamfering between the side of first seal groove and the sealing mating surface.
In the technical scheme, the first arc-shaped chamfering is set, mechanical property of the stress shearing to diaphragm can be reduced
Influence, extend the service life of diaphragm.
Preferably, forming the second arc-shaped chamfering between the side of second seal groove and the sealing mating surface.
In the technical scheme, the second arc-shaped chamfering is set, mechanical property of the stress shearing to diaphragm can be reduced
Influence, extend the service life of diaphragm.
The present invention also provides a kind of flow batteries, including：
First liquid flow frame, the second liquid flow frame, surface of first liquid flow frame towards second liquid flow frame are that sealing is matched
Conjunction face；
At least one set of above-mentioned sealing structure, first seal groove, second seal groove are located at first liquid flow frame
Surface towards second liquid flow frame.
In the technical scheme, by above-mentioned sealing structure, the first liquid flow frame, the second liquid flow frame can be sealed, effectively
Prevent the electrolyte of pile from leaking outside.
Preferably, first seal groove, the second seal groove are around the circumferentially disposed of first liquid flow frame.
In the technical scheme, by the arrangement of above-mentioned first seal groove, the second seal groove, circumferentially by the first liquid flow frame
It is fully sealed.
On the basis of common knowledge of the art, above-mentioned each optimum condition can be combined arbitrarily to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that：
The sealing structure and flow battery comprising it by the way that double density sealing groove, dual-seal bar is arranged, and diaphragm are arranged in
The leakage resistance of the structure of the both sides of dual-seal bar, electrolyte increases, this sealing means can effectively increase the leakage of electrolyte
Resistance prevents pile from leaking outside；The shearing force that is subject to when reducing diaphragm stress concentration can protect diaphragm to the maximum extent, increase every
The service life of film reduces the manufacturing cost of flow battery.
Description of the drawings
Fig. 1 is the structural schematic diagram of sealing structure of the present invention.
Fig. 2 is the front view of sealing structure shown in FIG. 1.
Fig. 3 is the structural schematic diagram of the first liquid flow frame of flow battery of the present invention.
Reference sign
Sealing structure 1
Diaphragm 11
First seal groove 12
First side 121
First chamfering 122
Second seal groove 13
Second side 131
Second chamfering 132
First sealing strip 14
Second sealing strip 15
First deckle board 2
Seal mating surface 21
Second deckle board 3
First liquid flow frame 4
Specific implementation mode
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
It is as shown in Figure 1 to Figure 2 an embodiment of the sealing structure 1 of the present invention.Sealing structure 1 is located at the first deckle board 2,
Between two deckle boards 3, sealing structure 1 is close including diaphragm 11, the first seal groove 12, the second seal groove 13, the first sealing strip 14, second
Strip of paper used for sealing 15, surface of first deckle board 2 towards the second deckle board 3 are sealing mating surface 21, the first seal groove 12, the second seal groove 13
In in sealing mating surface 21, the first seal groove 12, the second seal groove 13 are mutually parallel, and the first sealing strip 14 is filled in the first sealing
In slot 12, the second sealing strip 15 is filled in the second seal groove 13；Diaphragm 11 extends to first from the side of the first seal groove 12
Between sealing strip 14, the first seal groove 12, then stretches out and is covered on the second seal groove 13 from the other side of the first seal groove 12,
Second sealing strip 15 is between the second seal groove 13 and diaphragm 11.
By being arranged the first sealing strip 14, the second sealing strip 15 in the both sides of diaphragm 11 so that the sealing structure 1 can have
The first deckle board 2 of effect ground sealing, the second deckle board 3, solve the problems, such as that the sealing reliability of traditional single track seal groove is poor.
Wherein, the first sealing strip 14, the second sealing strip 15 section be circle.Circular sealing strip, can be preferably
Coordinate with seal groove, and there is distortion allowance.Meanwhile the circular surface of sealing strip, reduce the mechanical property to diaphragm 11
Influence, extend the service life of diaphragm 11.
As shown in Fig. 2, the first sealing strip 14 is protruding to outside sealing mating surface 21, the second sealing strip 15 is protruding to sealing cooperation
Outside face 21.In this way, when the second deckle board 3 being made to be pressed on the first deckle board 2, the first sealing strip 14, the second sealing strip 15 can be deformed slightly,
It ensure that sealing effect.
As shown in Fig. 2, forming arc-shaped first between the first side 121 and sealing mating surface 21 of the first seal groove 12
Chamfering 122；The second arc-shaped chamfering 132 is formed between the second side 131 and sealing mating surface 21 of second seal groove 13.If
The first arc-shaped chamfering 122, the second chamfering 132 are set, influence of the stress shearing to the mechanical property of diaphragm 11 can be reduced, prolonged
The service life of long diaphragm 11.
When above-mentioned sealing structure 1 is applied to flow battery, it is set between two liquid flow frames, that is, is set to the first liquid flow frame
Between 4 (as shown in Figure 3), the second liquid flow frame (not shown).And the first seal groove 12, the second seal groove 13 are located at the first liquid
Flow surface of the frame 4 towards the second liquid flow frame.By above-mentioned sealing structure 1, the first liquid flow frame 4, the second liquid flow frame can be sealed, is had
Prevent the electrolyte of pile from leaking outside to effect.
As shown in figure 3, the first seal groove 12, the second seal groove 13 are circumferentially disposed around the first liquid flow frame 4.Pass through above-mentioned
First liquid flow frame 4 is circumferentially fully sealed the arrangement of one seal groove 12, the second seal groove 13.
Flow battery in the present embodiment, used sealing structure 1 are one group.In fact, can also be set according to actual
Meter needs, and is sealed to two liquid flow frames being oppositely arranged of flow battery using multigroup sealing structure 1, i.e., in the first liquid stream
Arrange that a plurality of seal groove, every two seal grooves constitute one group of sealing structure 1 on frame 4.
The sealing effect of flow battery when to examine above-mentioned sealing structure 1 to be applied to flow battery has carried out two groups following
Experiment.
First group of experiment：It is assembled into pile using above-mentioned sealing structure 1, all parts dimensional parameters are as follows：Electrode area
3650cm2, monocell number 30, bipolar 600 × 700mm of board size, 600 × 700mm of electrode frame size.
Test is charged using 150A, pile charge and discharge coulombic efficiency 96%, energy efficiency 83%, voltage efficiency 86%.Six
Observation, diaphragm and intact, the diaphragm satisfactory mechanical property of sealing are dismantled after a month.
Second group of experiment：It is assembled into pile using above-mentioned sealing structure 1, all parts dimensional parameters are as follows：Electrode area
5250cm2, monocell number 60, bipolar 700 × 800mm of board size, 700 × 800mm of electrode frame size.
Test is charged using 300A, pile charge and discharge coulombic efficiency 93%, energy efficiency 78%, voltage efficiency 84%.Six
Observation, diaphragm and intact, the diaphragm satisfactory mechanical property of sealing are dismantled after a month.
The present invention is not limited to the above-described embodiments, no matter making any variation in its shape or structure, all falls within this hair
Within bright protection domain.Protection scope of the present invention is defined by the appended claims, and those skilled in the art exists
Under the premise of without departing substantially from the principle and substance of the present invention, many changes and modifications may be made, but these
Change and modification each fall within protection scope of the present invention.
Claims (9)
1. a kind of sealing structure, the sealing structure is between the first deckle board, the second deckle board, and first deckle board is towards described
The surface of second deckle board is sealing mating surface, it is characterised in that：The sealing structure includes diaphragm, the first seal groove, second close
Sealing groove, the first sealing strip, the second sealing strip, first seal groove, the second seal groove are located in the sealing mating surface, described
First seal groove, the second seal groove are mutually parallel, and first sealing strip is filled in first seal groove, and described second is close
Strip of paper used for sealing is filled in second seal groove；The diaphragm extends to first sealing from the side of first seal groove
Between item, the first seal groove, then stretches out and be covered on second seal groove from the other side of first seal groove, it is described
Second sealing strip is between second seal groove and the diaphragm.
2. sealing structure as described in claim 1, it is characterised in that：The section of first sealing strip is circle.
3. sealing structure as claimed in claim 1 or 2, it is characterised in that：First sealing strip is protruding to the sealing and matches
Outside conjunction face.
4. sealing structure as described in claim 1, it is characterised in that：The section of second sealing strip is circle.
5. sealing structure as described in claim 1 or 4, it is characterised in that：Second sealing strip is protruding to the sealing and matches
Outside conjunction face.
6. sealing structure as described in claim 1, it is characterised in that：The first side of first seal groove and the sealing
The first arc-shaped chamfering is formed between mating surface.
7. sealing structure as described in claim 1, it is characterised in that：The second side of second seal groove and the sealing
The second arc-shaped chamfering is formed between mating surface.
8. a kind of flow battery, which is characterized in that including：
First liquid flow frame, the second liquid flow frame, surface of first liquid flow frame towards second liquid flow frame are sealing mating surface；
At least one set of claim 1 to 7 any one of them sealing structure, first seal groove, second seal groove position
In surface of first liquid flow frame towards second liquid flow frame.
9. flow battery as claimed in claim 8, it is characterised in that：First seal groove, the second seal groove are around described
One liquid flow frame it is circumferentially disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195301.2A CN108400366B (en) | 2018-03-09 | 2018-03-09 | Sealing structure and flow battery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195301.2A CN108400366B (en) | 2018-03-09 | 2018-03-09 | Sealing structure and flow battery comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108400366A true CN108400366A (en) | 2018-08-14 |
| CN108400366B CN108400366B (en) | 2024-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810195301.2A Active CN108400366B (en) | 2018-03-09 | 2018-03-09 | Sealing structure and flow battery comprising same |
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| 王双印: "全钒氧化还原液流电池电极材料的改性及电堆结构设计", 《中国优秀硕士学位论文全文书记处库 工程科技Ⅱ辑》, no. 3, pages 042 - 1383 * |
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