CN106410248A - Redox flow battery - Google Patents
Redox flow battery Download PDFInfo
- Publication number
- CN106410248A CN106410248A CN201610312736.1A CN201610312736A CN106410248A CN 106410248 A CN106410248 A CN 106410248A CN 201610312736 A CN201610312736 A CN 201610312736A CN 106410248 A CN106410248 A CN 106410248A
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- Prior art keywords
- positive pole
- negative pole
- auxiliary tank
- liquid pump
- fluid reservoir
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- 239000007788 liquid Substances 0.000 claims abstract description 79
- 239000012530 fluid Substances 0.000 claims description 44
- 239000003792 electrolyte Substances 0.000 abstract description 30
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000001802 infusion Methods 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005381 potential energy Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 229910052720 vanadium Inorganic materials 0.000 description 6
- 239000008151 electrolyte solution Substances 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001456 vanadium ion Inorganic materials 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
-
- 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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- Fuel Cell (AREA)
- 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)
Abstract
The invention relates to a redox flow battery, which comprises a battery stack, a positive liquid storage tank, a positive auxiliary tank, a negative liquid storage tank and a negative auxiliary tank, wherein the top of the positive liquid storage tank and the top of the negative liquid storage tank communicate with the top of the battery stack through a main liquid inlet pipe with a valve separately; the bottom of the positive liquid storage tank and the bottom of the negative liquid storage tank communicate with the bottom of the battery stack through a main liquid outlet pipe with a valve and an infusion pump separately; the maximum liquid levels of the positive auxiliary tank and the negative auxiliary tank are lower than the lowest interface of the battery stack; the positive auxiliary tank and the negative auxiliary tank communicate with the battery stack through an auxiliary liquid inlet pipe with a valve separately; and the positive auxiliary tank and the negative auxiliary tank communicate with the battery stack through an auxiliary liquid outlet pipe with a valve and an infusion pump separately. According to the redox flow battery, the problems of corrosion, self-discharge and the like due to the fact that the stack is soaked in an electrolyte for a long period of time in a horizontal structure are solved; the service life of the redox flow battery is prolonged; and maintenance is convenient.
Description
Technical field
The invention belongs to field of batteries is and in particular to a kind of redox flow batteries.
Background technology
The active material of conventional accumulators is inclusive within solid state electrode, redox flow batteries(As all-vanadium flow battery)Positive and negative electrode active material be primarily present in electrolyte, the electrolyte that it contains positive and negative electrode active matter is attached separately in two fluid reservoirs.Taking all-vanadium flow battery as a example, vanadium ion solution is positive and negative electrode active material, positive pole is that V (IV)/V (V) electricity is right, negative pole is then that V (III)/V (II) electricity is right, the solvent that it adopts is dilute sulfuric acid, anode electrolyte is V (V) and the sulfuric acid solution of V (IV), and electrolyte liquid is V (III) and V (II) sulfuric acid solution.Ideally, after battery is fully charged, positive solution all (V) sulfate ion solution, negative solution all V (II) sulfuric acid solution, OCP is more 1.6V.During all-vanadium flow battery work, all-vanadium flow battery is circulated through by liquid-feeding pump, the positive and negative electrode electrolyte in all-vanadium flow battery is separated by amberplex.
Redox flow batteries structure is mainly horizontal structure or up-down structure at present.The all-vanadium flow battery of multiple fluid reservoirs disclosed in United States Patent (USP) US20080241643, it is that fluid reservoir is divided into multiple modularizations, increase electrolyte volume, can effective electrolyte first volume, maintain electrolyte second volume simultaneously, allow small lot operation electrolyte, fluid reservoir and pile belong to horizontal structure design.A kind of flow battery disclosed in Japan Patent JP2006147376, pile and fluid reservoir are up-down structure, pressure differential between anode electrolyte and electrolyte liquid is calculated by controller, and then control the rotating speed of each circulating pump, make the pressure differential between anode electrolyte and electrolyte liquid in prescribed limit.A kind of redox flow battery system disclosed in Chinese patent 201010108417.1, pile and fluid reservoir are horizontal structure, a kind of can reduce redox flow batteries leakage current, improve the novel battery system of battery charging and discharging performance, positive and negative electrode fluid reservoir is completely isolated to upper and lower two parts with dividing plate respectively.But there is problems with said structure:1)When redox flow batteries adopt horizontal structure, when battery does not run, pile long period of soaking in the electrolytic solution, the problems such as easily produce burn into self discharge;2)When redox flow batteries adopt up-down structure, need to be transported in the high pile of potential energy electrolyte from the low fluid reservoir of potential energy, cause pump loss to increase, system effectiveness reduces.
Content of the invention
It is an object of the invention to provide a kind of redox flow batteries, the problems such as this redox flow batteries solves the burn into self discharge that in horizontal structure, pile long period of soaking is brought in the electrolytic solution, extend the service life of redox flow batteries, convenient maintenance.
The technical solution adopted in the present invention is:
A kind of redox flow batteries, including battery pile, positive pole fluid reservoir, positive pole auxiliary tank, negative pole fluid reservoir and negative pole auxiliary tank, the top of positive pole fluid reservoir is connected with the top of battery pile by the main input duct with valve respectively with the top of negative pole fluid reservoir, the bottom of positive pole fluid reservoir is with the bottom of negative pole fluid reservoir respectively by connecting with the bottom of battery pile with the main drain pipe road of drawing liquid pump with valve, the highest liquid level of positive pole auxiliary tank and negative pole auxiliary tank is below the minimum interface of battery pile, positive pole auxiliary tank is connected with battery pile by the auxiliary input duct with valve respectively with negative pole auxiliary tank, positive pole auxiliary tank is with negative pole auxiliary tank respectively by connecting with battery pile with the auxiliary drain pipe road of drawing liquid pump with valve.
Further, main drain pipe road tank connected with positive pole liquid storage and assist tank connected auxiliary drain pipe road to share a drawing liquid pump with positive pole, described drawing liquid pump is positive pole drawing liquid pump, and wherein, the connecting pipe of the outlet of positive pole drawing liquid pump and battery pile is common conduit;Main drain pipe road tank connected with negative pole liquid storage and assist tank connected auxiliary drain pipe road to share a drawing liquid pump with negative pole, described drawing liquid pump is negative pole drawing liquid pump, and wherein, the connecting pipe of the outlet of negative pole drawing liquid pump and battery pile is common conduit.
Further, the highest liquid level of positive pole fluid reservoir and negative pole fluid reservoir is above the highest interface of battery pile.
The invention has the beneficial effects as follows:
1. the present invention sets up positive pole auxiliary tank and negative pole auxiliary tank and corresponding bypass duct, when redox flow batteries are stopped transport, close main road pipeline valve, open bypass duct valve, under potential energy effect, electrolyte in battery pile flows in auxiliary tank, when redox flow batteries run, again the liquid drawing liquid pump in auxiliary tank is extracted in battery pile, then open main road pipeline valve, close bypass duct valve, carry out normal power generation, this redox flow batteries solves the corrosion that in horizontal structure, pile long period of soaking is brought in the electrolytic solution, the problems such as self discharge, extend the service life of redox flow batteries;When battery pile needs to safeguard, electrolyte can be left in auxiliary tank, without being separately provided the tank body specially deposited, conveniently keep in repair.
2., because operation when operation when redox flow batteries are stopped transport and redox flow batteries run is not that synchronization is carried out, so sharing drawing liquid pump not interfere with corresponding operating, and saved cost.
3., when redox flow batteries run, electrolyte flows to battery pile from fluid reservoir under the double action of potential energy difference and drawing liquid pump, reduces the loss of drawing liquid pump.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure:1- battery pile;2- positive pole fluid reservoir;3- negative pole fluid reservoir;4- positive pole drawing liquid pump;5- negative pole drawing liquid pump;Valve on 6- and the tank connected main input duct of positive pole liquid storage;Valve on 7- and the tank connected main input duct of negative pole liquid storage;Valve on 8- and the tank connected main drain pipe road of positive pole liquid storage;Valve on 9- and the tank connected main drain pipe road of positive pole liquid storage;10- assists the valve on tank connected auxiliary drain pipe road with positive pole;11- assists the valve in tank connected auxiliary input duct with positive pole;12- assists the valve in tank connected auxiliary input duct with negative pole;13- assists the valve on tank connected auxiliary drain pipe road with negative pole;14- positive pole auxiliary tank;15- negative pole auxiliary tank.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of redox flow batteries, including battery pile 1, positive pole fluid reservoir 2, positive pole auxiliary tank 14, negative pole fluid reservoir 3 and negative pole auxiliary tank 15, the top of the top of positive pole fluid reservoir 2 and negative pole fluid reservoir 3 is passed through to carry valve respectively(It is respectively 6 and 7)Main input duct connect with the top of battery pile 1, the bottom of the bottom of positive pole fluid reservoir 2 and negative pole fluid reservoir 3 is passed through to carry valve respectively(It is respectively 8 and 9)And drawing liquid pump(It is respectively 4 and 5)Main drain pipe road connect with the bottom of battery pile 1, the highest liquid level of positive pole auxiliary tank 14 and negative pole auxiliary tank 15 is below the minimum interface of battery pile 1, and positive pole auxiliary tank 14 and negative pole auxiliary tank 15 pass through to carry valve respectively(It is respectively 11 and 12)Auxiliary input duct connect with battery pile 1, positive pole auxiliary tank 14 and negative pole auxiliary tank 15 pass through to carry valve respectively(It is respectively 10 and 13)And drawing liquid pump(It is respectively 4 and 5)Auxiliary drain pipe road connect with battery pile 1.
The present invention sets up positive pole auxiliary tank 14 and negative pole auxiliary tank 15 and corresponding bypass duct, when redox flow batteries are stopped transport, closes main road pipeline valve, opens bypass duct valve, under potential energy effect, the electrolyte in battery pile 1 flows to auxiliary tank(14 and 15)In, when redox flow batteries run, then by auxiliary tank(14 and 15)In liquid drawing liquid pump(4 and 5)It is extracted in battery pile 1, then open main road pipeline valve, close bypass duct valve, carry out normal power generation, the problems such as this redox flow batteries solves the burn into self discharge that in horizontal structure, pile long period of soaking is brought in the electrolytic solution, extends the service life of redox flow batteries;When battery pile 1 needs to safeguard, electrolyte can be left in auxiliary tank(14 and 15)In, without being separately provided the tank body specially deposited, conveniently keep in repair.
As shown in figure 1, in the present embodiment, the main drain pipe road being connected with positive pole fluid reservoir 2 and the auxiliary drain pipe road being connected with positive pole auxiliary tank 14 share a drawing liquid pump 4(That is, positive pole drawing liquid pump 4), wherein, the outlet of positive pole drawing liquid pump 4 is common conduit with the connecting pipe of battery pile 1;The main drain pipe road being connected with negative pole fluid reservoir 3 and the auxiliary drain pipe road being connected with negative pole auxiliary tank 15 share a drawing liquid pump 5(That is, negative pole drawing liquid pump 5), wherein, the outlet of negative pole drawing liquid pump 5 is common conduit with the connecting pipe of battery pile 1.Because operation when operation when redox flow batteries are stopped transport and redox flow batteries run is not that synchronization is carried out, so sharing drawing liquid pump(4 and 5)Do not interfere with corresponding operating, and save cost.
In the present embodiment, the highest liquid level of positive pole fluid reservoir 2 and negative pole fluid reservoir 3 is above the highest interface of battery pile 1.When redox flow batteries run, electrolyte is in potential energy difference and drawing liquid pump(4 and 5)Double action under from fluid reservoir(2 and 3)Flow to battery pile 1, reduce drawing liquid pump(4 and 5)Loss.
In the present embodiment, positive pole fluid reservoir 2, the volume of positive pole auxiliary tank 14, negative pole fluid reservoir 3 and negative pole auxiliary tank 15 determine according to the specification of battery pile 1 and quantity, general range is 1L ~ 1000L.In the present embodiment, positive pole drawing liquid pump 4 and negative pole drawing liquid pump 5 are variable frequency pump.
The workflow of the embodiment of the present invention is:
When redox flow batteries are stopped transport, close main road pipeline valve(6th, 7,8 and 9)With partial bypass valve(10 and 13), open partial bypass pipeline valve(11 and 12), under potential energy effect, the anode electrolyte in battery pile 1 flows in positive pole auxiliary tank 14, and the electrolyte liquor stream in battery pile 1, in negative pole auxiliary tank 15, when redox flow batteries need to run, closes part bypass duct valve(11 and 12), open partial bypass valve(10 and 13), positive pole drawing liquid pump 4 and negative pole drawing liquid pump 5, positive pole drawing liquid pump 4 by anode electrolyte suction battery pile 1, by electrolyte liquid suction battery pile 1, collect after finishing negative pole drawing liquid pump 5, closes bypass valve by the electrolyte in battery pile 1(10th, 11,12 and 13), open main road pipeline valve(6th, 7,8 and 9)Now, redox flow batteries bring into operation, anode electrolyte flows to battery pile 1 from the bottom of positive pole fluid reservoir 2 in the presence of potential energy difference and positive pole drawing liquid pump 4, anode electrolyte in battery pile 1 flows to positive pole fluid reservoir 2 from top under extruding impetus, it is thusly-formed circulation, simultaneously, electrolyte liquid flows to battery pile 1 from the bottom of negative pole fluid reservoir 3 in the presence of potential energy difference and negative pole drawing liquid pump 5, electrolyte liquid in battery pile 1 flows to negative pole fluid reservoir 3 from top under extruding impetus, is thusly-formed circulation.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted, and all these modifications and variations all should be belonged to the protection domain of claims of the present invention.
Claims (3)
1. a kind of redox flow batteries it is characterised in that:Including battery pile, positive pole fluid reservoir, positive pole auxiliary tank, negative pole fluid reservoir and negative pole auxiliary tank, the top of positive pole fluid reservoir is connected with the top of battery pile by the main input duct with valve respectively with the top of negative pole fluid reservoir, the bottom of positive pole fluid reservoir is with the bottom of negative pole fluid reservoir respectively by connecting with the bottom of battery pile with the main drain pipe road of drawing liquid pump with valve, the highest liquid level of positive pole auxiliary tank and negative pole auxiliary tank is below the minimum interface of battery pile, positive pole auxiliary tank is connected with battery pile by the auxiliary input duct with valve respectively with negative pole auxiliary tank, positive pole auxiliary tank is with negative pole auxiliary tank respectively by connecting with battery pile with the auxiliary drain pipe road of drawing liquid pump with valve.
2. as claimed in claim 1 a kind of redox flow batteries it is characterised in that:Main drain pipe road tank connected with positive pole liquid storage and assist tank connected auxiliary drain pipe road to share a drawing liquid pump with positive pole, described drawing liquid pump is positive pole drawing liquid pump, and wherein, the connecting pipe of the outlet of positive pole drawing liquid pump and battery pile is common conduit;Main drain pipe road tank connected with negative pole liquid storage and assist tank connected auxiliary drain pipe road to share a drawing liquid pump with negative pole, described drawing liquid pump is negative pole drawing liquid pump, and wherein, the connecting pipe of the outlet of negative pole drawing liquid pump and battery pile is common conduit.
3. as claimed in claim 1 a kind of redox flow batteries it is characterised in that:The highest liquid level of positive pole fluid reservoir and negative pole fluid reservoir is above the highest interface of battery pile.
Priority Applications (1)
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CN201610312736.1A CN106410248A (en) | 2016-05-12 | 2016-05-12 | Redox flow battery |
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CN201610312736.1A CN106410248A (en) | 2016-05-12 | 2016-05-12 | Redox flow battery |
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CN201610312736.1A Pending CN106410248A (en) | 2016-05-12 | 2016-05-12 | Redox flow battery |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114263567A (en) * | 2021-12-08 | 2022-04-01 | 广东力恒新能源科技有限公司 | Iron-chromium liquid flow energy storage battery system |
WO2024086411A1 (en) * | 2022-10-19 | 2024-04-25 | Ess Tech, Inc. | Gravity drainage subsystem for redox flow battery system |
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CN102664279A (en) * | 2012-04-27 | 2012-09-12 | 深圳市金钒能源科技有限公司 | Passive power supply method and power supply system for vanadium cell emergency power supply |
CN203659994U (en) * | 2013-12-24 | 2014-06-18 | 青海百能汇通新能源科技有限公司 | Self-flowing type zinc-bromine flow battery |
CN204966601U (en) * | 2015-09-23 | 2016-01-13 | 特变电工沈阳变压器集团有限公司 | Realize black device that starts of zinc bromine liquid stream system battery |
CN205810966U (en) * | 2016-05-12 | 2016-12-14 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of redox flow batteries |
-
2016
- 2016-05-12 CN CN201610312736.1A patent/CN106410248A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102664279A (en) * | 2012-04-27 | 2012-09-12 | 深圳市金钒能源科技有限公司 | Passive power supply method and power supply system for vanadium cell emergency power supply |
CN203659994U (en) * | 2013-12-24 | 2014-06-18 | 青海百能汇通新能源科技有限公司 | Self-flowing type zinc-bromine flow battery |
CN204966601U (en) * | 2015-09-23 | 2016-01-13 | 特变电工沈阳变压器集团有限公司 | Realize black device that starts of zinc bromine liquid stream system battery |
CN205810966U (en) * | 2016-05-12 | 2016-12-14 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of redox flow batteries |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114263567A (en) * | 2021-12-08 | 2022-04-01 | 广东力恒新能源科技有限公司 | Iron-chromium liquid flow energy storage battery system |
CN114263567B (en) * | 2021-12-08 | 2024-04-02 | 广东力恒新能源科技有限公司 | Iron-chromium liquid flow energy storage battery system |
WO2024086411A1 (en) * | 2022-10-19 | 2024-04-25 | Ess Tech, Inc. | Gravity drainage subsystem for redox flow battery system |
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