CN106611863A - Structure for preventing bipolar plate from being corroded in electric stack of redox flow battery - Google Patents
Structure for preventing bipolar plate from being corroded in electric stack of redox flow battery Download PDFInfo
- Publication number
- CN106611863A CN106611863A CN201510676675.2A CN201510676675A CN106611863A CN 106611863 A CN106611863 A CN 106611863A CN 201510676675 A CN201510676675 A CN 201510676675A CN 106611863 A CN106611863 A CN 106611863A
- Authority
- CN
- China
- Prior art keywords
- electrode frame
- bipolar plates
- electrolyte
- hole
- negative electrode
- 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
- 239000003792 electrolyte Substances 0.000 claims abstract description 56
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005536 corrosion prevention Methods 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 5
- 239000003014 ion exchange membrane Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- ZRXYMHTYEQQBLN-UHFFFAOYSA-N [Br].[Zn] Chemical compound [Br].[Zn] ZRXYMHTYEQQBLN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
- H01M8/04283—Supply means of electrolyte to or in matrix-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
- H01M8/18—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
-
- 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
Landscapes
- 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)
- Hybrid Cells (AREA)
Abstract
The invention relates to a corrosion prevention structure of a redox flow battery, in particular to a corrosion prevention structure of a bipolar plate in a redox flow battery. An electrolyte inlet/outlet is arranged on an electrode frame and communicates with a public pipeline, meanwhile, through holes are also arranged and communicate with the another pole electrolyte, an annular boss is arranged on the through hole, near to one side of the bipolar plate, of the electrode frame, the height of the annular boss is the same as the thickness of the bipolar plate, the through hole of the bipolar plate is placed on an edge of the annular boss and then is pressed on the other pole electrode frame, a negative electrolyte passes through a through hole of a positive electrode frame and the annular boss and then flows into the electrolyte inlet or the electrolyte outlet of a negative electrode frame, and a positive electrolyte passes through a through hole of the negative electrode frame and the annular boss and then flows into the electrolyte inlet or the electrolyte outlet of the positive electrode frame. By the corrosion prevention structure, an electrolyte in the public pipeline is prevented from being in contact with the bipolar plate, a corrosion phenomenon is fundamentally prevented, and the reliability of the electric stack is prevented.
Description
Technical field
The present invention relates to a kind of anti-corrosion structure of flow battery, more particularly to bipolar in flow battery
The anti-corrosion structure of plate.
Background technology
At present, the whole world is faced with shortage of resources, and the nervous situation of energy supply significantly limit complete
Ball expanding economy.Develop the climax that efficient regenerative resource has welcome development in this context.
But the intrinsic discontinuity of regenerative resource and anti-peak-shaving capability cause its extensive when accessing electrical network pairs
Electrical network causes huge impact, thus it is a kind of regenerative resource it is grid-connected with intelligent grid in the middle of buffering
Technology has been mentioned the forward position of electric power network technique transition.Energy storage technology obtains more next as the buffer technology
More concerns, wherein flow battery as electrochemical energy storage device welcome technological innovation in recent years with
And the great development of industrialization, various flow battery technologies are had at present by commercialization, including all-vanadium flow
Battery, zinc-bromine flow battery etc..Flow battery is because of its innate advantage：Power and energy decoupling, it is special
Not Shi He extensive energy storage application.
One distinguishing feature of flow battery is that reactant is decoupled with power apparatus, carries the electricity of reactant
Solution liquid is flowed into by circulating pump and participate in the middle of battery reaction, and product is being flowed out by battery, returns to liquid storage
In tank, so move in circles.The monocell of flow battery is by cell end plate, collector plate, anode electrode
Frame, anode electrode, ion exchange membrane, negative electrode, negative electrode frame, collector plate and cell end plate
Order assembles, and the leakage of electrolyte is then prevented by the bolt presses on end plate.In practical application
In, often constitute flow cell pile to meet the demand of high-power discharge and recharge.Pile is in monocell
On the basis of be connected with bipolar plates between multiple monocells, then be cascaded by the way of pressure filter
Composition pile.In flow cell pile, electrolyte evenly distributing between each battery becomes difference
In the key factor of other battery piles, thus electrolysis is all devised in most flow cell pile
The branch line of liquid common line and electrolyte.Common line by every batteries positive and negative electrode electrode frame,
Through hole even in bipolar plates and ion exchange membrane combines to be formed.The axis of its pipeline often parallel to
The thickness direction of above-mentioned pile component；Branch line is mostly designed in positive and negative electrode electrode frame, mainly
Responsible electrolyte evenly distributing in the electrodes.
Due to the cell voltage difference between the conducting solution in common line and each monocell, public pipe
Often formed in road in sectional area, length and the pile of leakage current, its size and common line
The joint number of monocell is relevant.The electricity in the through hole section and common line of common line is constituted in bipolar plates
Solution liquid phase contact.The material for constituting bipolar plates is often that graphite, carbon composite or acid and alkali-resistance are rotten
The metal of erosion, leakage current can lure that the through hole section on bipolar plate thickness occurs oxidation reaction into, make
Soften into bipolar plates burn into, in turn result in pile leakage.
The content of the invention
In order to solve the etching problem of bipolar plates in above-mentioned flow battery, the invention provides a kind of liquid stream
The structure of battery, by arranging annular boss in the electrode frame of bipolar plates through hole side, by bipolar plates
Through hole be placed in the outer rim of annular boss, then press and upper another pole electrode frame.Electrolyte is through electricity
The inlet or liquid outlet of pole frame flows into or out electrode frame, by the common line stream in pile
Cross the through hole that the annular boss arranged in electrode frame flows directly into another pole, it is to avoid in common line
Contact of the electrolyte with bipolar plates, fundamentally prevents the generation of corrosion phenomenon, improves pile
Reliability.
To reach above-mentioned purpose, the technical solution used in the present invention is：
The structure for preventing bipolar plates from corroding in the flow cell pile：Flow cell pile part includes
Anode electrode frame, negative electrode frame and bipolar plates therein are sandwiched in, anode electrode frame is provided with negative pole
Electrolyte common line through hole, anode electrode frame are provided with what is be connected with anode electrolyte common line
Anode electrolyte inlet and liquid outlet, negative electrode frame are provided with anode electrolyte common line through hole,
Negative electrode frame is provided with the electrolyte liquid inlet that is connected with electrolyte liquid common line and is gone out
Liquid mouth, bipolar plates are provided with anode electrolyte common line and electrolyte liquid common line through hole.
Ring-type convex is provided with the edge of anode electrode frame through hole, ring-type convex is located at positive electrical
, on the surface of bipolar plates side, through hole is in the anode electrode frame surface near bipolar plates side for pole frame
Projection positioned at ring-type convex hollow region, ring-type convex is along perpendicular to anode electrode frame surface direction
Height be equal to bipolar plate thickness；Ring-type convex is provided with the edge of negative electrode frame through hole,
Ring-type convex is located at negative electrode frame on the surface of bipolar plates side, and through hole is near bipolar plates one
The negative electrode frame surface of side projection positioned at ring-type convex hollow region, ring-type convex along perpendicular to
The height of negative electrode frame surface direction is equal to bipolar plate thickness；
Bipolar plates are clipped between anode electrode frame and negative electrode frame, and in bipolar plates the shape of through hole and
Four the week side of boss of the corresponding anode electrode frame upper annular convex of size and negative electrode frame upper annular convex
The shape and size of wall are mutually surely closed.
In the described structure for preventing bipolar plates corrosion, the through hole of electrolyte liquid Jing anode electrode frames and
The electrolyte inlet or liquid outlet of negative electrode frame are flowed to after ring-type convex；Anode electrolyte Jing bears
The electrolyte inlet or liquid outlet of anode electrode frame are flowed to after the through hole and ring-type convex of pole electrode frame,
Electrolyte is not contacted with the through hole edge of bipolar plates.
In the described structure for preventing bipolar plates corrosion, bipolar plates are positioned over into the positive electrical with platform
On pole frame or negative electrode frame, the through hole in bipolar plates is placed on ring-type convex outer rim, places another afterwards
One negative electrode frame or anode electrode frame, make another negative electrode frame of bipolar plates correspondence or positive electrical
Electrolyte inlet or liquid outlet on the frame of pole, is completed.
In the described structure for preventing bipolar plates corrosion, anode electrode frame, negative electrode frame and bipolar
Between plate can it is gluing connect or hot pressing connects by way of be brought into close contact together.Bipolar plates are stone
The poor metal material of black plate, carbon composite plate or anti-corrosion capability.Positive pole or negative electrode frame
Receptacle material be polyethylene, polypropylene or polrvinyl chloride.
The invention has the advantages that：
1. the present invention has completely cut off electrolyte contact with bipolar plates through hole section in common line, effectively anti-
Stop the generation of electrochemical corrosion, improve the reliability of pile.
2. present configuration is simple, low cost, it is easy to machining control, throws without the equipment of complex and expensive
Money.
Description of the drawings
Fig. 1 is the electrode frame structure in the flow cell pile of the present invention.
Specific embodiment
Embodiment：
Anode electrode frame, the structure of negative electrode frame and bipolar plates and the cooperation for being adopted is as follows：It is bipolar
Plate is located between positive and negative electrode electrode frame.Anode electrode frame is provided with electrolyte liquid common line through hole,
And it is provided with the anode electrolyte inlet and liquid outlet being connected with anode electrolyte common line；Relatively
Answer, negative electrode frame is provided with anode electrolyte common line through hole, and is provided with and electrolyte liquid
Electrolyte liquid inlet and liquid outlet that common line is connected, bipolar plates are provided with anode electrolyte
Common line and electrolyte liquid common line through hole.In anode electrode frame towards the logical of bipolar plates side
The edge in hole is provided with ring-type convex；Negative electrode frame towards bipolar plates side through hole four
Ring-type convex is provided with circumferential edges.The ring-type convex arranged in positive and negative electrode electrode frame is along perpendicular to negative pole
The height of electrode frame surface direction is equal to bipolar plate thickness.Bipolar plates are clipped in anode electrode frame and negative pole
Between electrode frame, and in bipolar plates through hole the corresponding anode electrode frame upper annular of shape and size
The shape and size of four the week side of boss walls of convex and negative electrode frame upper annular convex are mutually surely closed.
Bipolar plates are positioned on the anode electrode frame with platform or negative electrode frame, in bipolar plates
Through hole be placed on ring-type convex outer rim, place another negative electrode frame or anode electrode frame afterwards, make
Electrolyte inlet or liquid outlet on another negative electrode frame of bipolar plates correspondence or anode electrode frame,
It is completed.In pile running, the through hole and ring-type convex of electrolyte liquid Jing anode electrode frames
The electrolyte inlet or liquid outlet of negative electrode frame are flowed to afterwards；Anode electrolyte Jing negative electrode frames
Through hole and ring-type convex after flow to the electrolyte inlet or liquid outlet of anode electrode frame, electrolyte
Do not contact with the through hole edge of bipolar plates.
The all-vanadium flow battery pile of 1kW is assembled using the structure, pile is made up of 10 batteries,
Ion exchange membrane is Nafion115, and its performance data is：Pile coulombic efficiency 94.1%, voltage efficiency
85.6%, energy efficiency 80.5%.Discovery bipolar plates through hole edge is disassembled after 1500 circulations
Corrosion is had no, is illustrated that the structure can prevent the generation of electrochemical corrosion well, is improved pile reliability.
Claims (6)
1. the structure for preventing bipolar plates from corroding in a kind of flow cell pile, flow cell pile part bag
Include anode electrode frame, negative electrode frame and be sandwiched in bipolar plates therein, anode electrode frame is provided with negative
Pole electrolyte common line through hole, anode electrode frame are provided with and are connected with anode electrolyte common line
Anode electrolyte inlet and liquid outlet, negative electrode frame be provided with anode electrolyte common line lead to
Hole, negative electrode frame are provided with the electrolyte liquid inlet being connected with electrolyte liquid common line
And liquid outlet, bipolar plates are provided with anode electrolyte common line and electrolyte liquid common line through hole；
It is characterized in that：
Ring-type convex is provided with the edge of anode electrode frame through hole, ring-type convex is located at positive electrical
, on the surface of bipolar plates side, through hole is in the anode electrode frame surface near bipolar plates side for pole frame
Projection positioned at ring-type convex hollow region, ring-type convex is along perpendicular to anode electrode frame surface direction
Height be equal to bipolar plate thickness；
Ring-type convex is provided with the edge of negative electrode frame through hole, ring-type convex is located at negative electricity
, on the surface of bipolar plates side, through hole is in the negative electrode frame surface near bipolar plates side for pole frame
Projection positioned at ring-type convex hollow region, ring-type convex is along perpendicular to negative electrode frame surface direction
Height be equal to bipolar plate thickness；
Bipolar plates are clipped between anode electrode frame and negative electrode frame, and in bipolar plates the shape of through hole and
Four the week side of boss of the corresponding anode electrode frame upper annular convex of size and negative electrode frame upper annular convex
The shape and size of wall are mutually surely closed.
2. the structure for preventing bipolar plates from corroding as claimed in claim 1, it is characterised in that：
Electrolyte liquid flows to the electrolysis of negative electrode frame Jing after the through hole and ring-type convex of anode electrode frame
Liquid inlet or liquid outlet；Anode electrolyte is flowed to Jing after the through hole and ring-type convex of negative electrode frame
The electrolyte inlet of anode electrode frame or liquid outlet, electrolyte through hole edge not with bipolar plates
Contact.
3. the structure for preventing bipolar plates from corroding as claimed in claim 1, it is characterised in that：Will be bipolar
Plate is positioned on the anode electrode frame with platform or negative electrode frame, and the through hole in bipolar plates is placed on
Ring-type convex outer rim, places another negative electrode frame or anode electrode frame afterwards, makes bipolar plates correspondence
Electrolyte inlet or liquid outlet on another negative electrode frame or anode electrode frame, is completed.
4. the structure for preventing bipolar plates from corroding as claimed in claim 1, it is characterised in that：Positive electrical
Between pole frame, negative electrode frame and bipolar plates can it is gluing connect or hot pressing connects by way of it is tight
It is closely connected to be combined.
5. the structure for preventing bipolar plates from corroding as claimed in claim 1, it is characterised in that：Bipolar plates
For the metal material that graphite cake, carbon composite plate or anti-corrosion capability are poor.
6. the structure for preventing bipolar plates from corroding as claimed in claim 1, it is characterised in that：Positive pole or
The receptacle material of person's negative electrode frame is polyethylene, polypropylene or polrvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676675.2A CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676675.2A CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106611863A true CN106611863A (en) | 2017-05-03 |
| CN106611863B CN106611863B (en) | 2019-07-05 |
Family
ID=58610546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676675.2A Active CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106611863B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928320A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Flow battery |
| CN114267861A (en) * | 2021-12-27 | 2022-04-01 | 华秦储能技术有限公司 | Flow battery pile structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847724A (en) * | 2010-03-31 | 2010-09-29 | 清华大学 | Bipolar plate frame and galvanic pile of flow battery |
| KR20100109253A (en) * | 2009-03-31 | 2010-10-08 | 주식회사 티엠시 | A metal bipolar plate set for a fuel cell and a manufacturing method thereof |
| CN102306821A (en) * | 2011-07-08 | 2012-01-04 | 清华大学 | End plate pressing component of redox flow cell galvanic pile |
| CN103811779A (en) * | 2014-03-13 | 2014-05-21 | 大连融科储能技术发展有限公司 | Electrode frame for flow cell, galvanic pile as well as cell system |
| WO2014083387A1 (en) * | 2012-11-30 | 2014-06-05 | Hydraredox Technologies Inc. | Back plate-electrode-membrane assembly for a redox, flow energy storage electrochemical cell |
-
2015
- 2015-10-16 CN CN201510676675.2A patent/CN106611863B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100109253A (en) * | 2009-03-31 | 2010-10-08 | 주식회사 티엠시 | A metal bipolar plate set for a fuel cell and a manufacturing method thereof |
| CN101847724A (en) * | 2010-03-31 | 2010-09-29 | 清华大学 | Bipolar plate frame and galvanic pile of flow battery |
| CN102306821A (en) * | 2011-07-08 | 2012-01-04 | 清华大学 | End plate pressing component of redox flow cell galvanic pile |
| WO2014083387A1 (en) * | 2012-11-30 | 2014-06-05 | Hydraredox Technologies Inc. | Back plate-electrode-membrane assembly for a redox, flow energy storage electrochemical cell |
| CN103811779A (en) * | 2014-03-13 | 2014-05-21 | 大连融科储能技术发展有限公司 | Electrode frame for flow cell, galvanic pile as well as cell system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928320A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Flow battery |
| CN114267861A (en) * | 2021-12-27 | 2022-04-01 | 华秦储能技术有限公司 | Flow battery pile structure |
| CN114267861B (en) * | 2021-12-27 | 2024-05-14 | 华秦储能技术有限公司 | Flow battery pile structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106611863B (en) | 2019-07-05 |
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Application publication date: 20170503 Assignee: Xinxing Ductile Iron Pipes Co.,Ltd. Assignor: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Contract record no.: X2023210000177 Denomination of invention: A structure for preventing bipolar plate corrosion in a flow battery stack Granted publication date: 20190705 License type: Common License Record date: 20231116 |