CN202127060U - Flow battery, flow battery stack and flow battery system - Google Patents
Flow battery, flow battery stack and flow battery system Download PDFInfo
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- CN202127060U CN202127060U CN2011202533801U CN201120253380U CN202127060U CN 202127060 U CN202127060 U CN 202127060U CN 2011202533801 U CN2011202533801 U CN 2011202533801U CN 201120253380 U CN201120253380 U CN 201120253380U CN 202127060 U CN202127060 U CN 202127060U
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- 239000007788 liquid Substances 0.000 claims abstract description 49
- 239000003792 electrolyte Substances 0.000 claims abstract description 47
- 229910052720 vanadium Inorganic materials 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 2
- 239000003014 ion exchange membrane Substances 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910002804 graphite Inorganic materials 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 238000003411 electrode reaction Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001456 vanadium ion Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a flow battery, a flow battery stack and a flow battery system, wherein the flow battery comprises a flow frame (1), collector plates (2), ion exchange membranes and electrodes; the flow frame (1) comprises a middle channel, a liquid inlet (11) and a liquid outlet (12); the liquid inlet (11) and the liquid outlet (12) are communicated with the middle channel; the collector plates (2) are arranged in the middle channel of the flow frame (1); the ion exchange membranes are arranged between adjacent collector plates (2) and form cavities for containing elelctrolyte with the collector plates (2); and the electrodes are arranged in the cavities and configured to ensure that flow direction specific surface area of the electrolyte from the liquid inlet (11) to the liquid outlet (12) is increased gradually. Through the utility model, the problem that the reaction rates of the electrodes and the heat generated by reaction are uneven as the concentration of reactive materials in the electrolyte is decreased gradually along with the reaction in the prior art is solved, so that the flow direction in the charging/discharging process is effectively decreased, the charging/discharging performance of the battery is improved and the service life of the battery is prolonged.
Description
Technical field
The utility model relates to field of batteries, in particular to a kind of flow battery, liquid stream battery stack and flow battery system.
Background technology
The kind of flow battery is a lot; All-vanadium flow battery is an example to use comparatively widely; All-vanadium flow battery is that a kind of vanadium ion electrolyte with different valence state carries out redox electrochemical reaction appts, can realize the mutual conversion between chemical energy and the electric energy efficiently.Such battery has long service life, and energy conversion efficiency is high, and fail safe is good, and advantages of environment protection can be used for the supporting extensive energy-storage system of wind power generation and photovoltaic generation, is one of electrical network peak load shifting, balanced loaded main selection.Therefore, all-vanadium flow battery becomes the emphasis that big capacity energy-storage battery is studied gradually in recent years.
All-vanadium flow battery is respectively with vanadium ion V2+/V3+ and the V4+/V5+ both positive and negative polarity oxidation-reduction pair as battery; Positive and negative electrode electrolyte is stored in respectively in two fluid reservoirs; Drive electrolyte to battery by pump; Be back to again and form closed circulation flow loop in the fluid reservoir, to realize the charge and discharge process.
In the all-vanadium flow battery system, the quality of stack performance is determining the charge-discharge performance of whole system, especially discharges and recharges power and efficient.Battery pile is to be stacked successively by the multi-disc monocell to compress, and is in series.Wherein, traditional monolithic flow battery and battery pile are as shown in Figure 1, and the monomer liquid galvanic battery comprises: liquid flow frame 1, collector plate 2, electrode 3 and amberplex 4 are stacked successively by a plurality of cells 5 and to compress and to be composed in series battery pile 6.
The electrode material that is used for vanadium redox battery is generally graphite felt, and this electrode material has loose structure, good electron conductivity, advantages such as resistance to corrosion and certain mechanical strength.Yet; Generally use both at home and abroad at present the graphite felt electrode directly and the collector plate integration system be equipped with battery pile; Electrolyte is in the process of graphite felt of flowing through; Reactive material concentration is along with the carrying out of reaction reduces gradually in the electrolyte, and it is inhomogeneous to cause electrode reaction rate and reaction everywhere to produce heat, and then reduces battery pile charge-discharge performance and useful life.
The utility model content
The utility model aims to provide a kind of flow battery, liquid stream battery stack and flow battery system; Reduce gradually with the carrying out of reactive material concentration in the electrolyte in the solution prior art along with reaction; It is inhomogeneous to cause electrode reaction rate and reaction everywhere to produce heat, and then reduces the charge-discharge performance of battery and the problem in useful life.
To achieve these goals, an aspect according to the utility model provides a kind of flow battery, comprising: liquid flow frame, have center-aisle, and inlet that is connected with center-aisle and liquid outlet; Collector plate is arranged in the liquid flow frame center-aisle; Amberplex is arranged between each collector plate, and amberplex and collector plate form the cavity that holds electrolyte; Electrode is arranged in the cavity, and electrode is configured to increase gradually along the electrolyte flow direction ratio surface area from the inlet to the liquid outlet.
Further, the specific area of electrode increases the increase gradually for noncontinuity gradually.
Further, electrode is made up of the polylith cell electrode; Each cell electrode has different specific surface, and the specific area of adjacent cell electrode is increase gradually along the electrolyte flow direction.
Further, the specific area of electrode increases gradually and is successional and increases gradually.
Further, each shape of cross section of electrode is identical, and the specific area along the electrolyte flow direction of electrode increases gradually.
Further, the area of each cross section of electrode increases along the direction of electrolyte flow gradually.
Further, electrode is the conductivity porous material.
According to the utility model on the other hand, a kind of liquid stream battery stack is provided, has comprised the flow battery of a plurality of series connection, flow battery is above-mentioned flow battery.
According to the utility model on the other hand, a kind of flow battery system is provided, has comprised: liquid stream battery stack, electrolyte container and pump, electrolyte container is communicated with the liquid flow frame of battery pile through pump, and liquid stream battery stack is above-mentioned liquid stream battery stack.
Further, the flow battery system is the all-vanadium flow battery system.
In the technical scheme of the utility model, flow battery comprises: liquid flow frame, collector plate, amberplex and electrode.Wherein, liquid flow frame has center-aisle, and inlet that is connected with center-aisle and liquid outlet; Collector plate is arranged in the liquid flow frame center-aisle; Amberplex is arranged between each collector plate, and amberplex and collector plate form the cavity that holds electrolyte; Electrode is arranged in the cavity, and electrode is configured to increase gradually along the electrolyte flow direction ratio surface area from the inlet to the liquid outlet.Though in the flow process of electrolyte from the inlet to the liquid outlet; Reactive material concentration is along with the carrying out of reaction reduces gradually in the electrolyte; But the electrode of the flow battery of the utility model increases in the specific area of electrolyte flow direction gradually, and just the haptoreaction area increases gradually, like this; Can guarantee the reaction rate homogeneous; Specifically, increase specific area through electrode and offset the reduction of reactive material concentration, reduce gradually along with the carrying out of reaction thereby efficiently solve reactive material concentration in the electrolyte; Cause electrode reaction rate and the uneven problem of reaction generation heat everywhere, and then improved the charge-discharge performance of battery and the problem in useful life.
Description of drawings
The Figure of description that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of flow battery of the prior art and liquid stream battery stack;
Fig. 2 shows the part-structure sketch map according to the embodiment one of the flow battery of the utility model;
Fig. 3 shows the schematic side view of the flow battery of Fig. 2;
Fig. 4 shows the schematic side view according to the embodiment two of the flow battery of the utility model; And
Fig. 5 shows the schematic side view according to the embodiment three of the flow battery of the utility model.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Fig. 2 shows the part-structure sketch map according to the embodiment one of the flow battery of the utility model; Fig. 3 shows the schematic side view of the flow battery of Fig. 2.In conjunction with referring to Fig. 2 to Fig. 3, the flow battery of embodiment one comprises: liquid flow frame 1, collector plate 2, amberplex (not shown) and electrode 3.Wherein, liquid flow frame 1 has center-aisle and the inlet that is connected with center-aisle 11 and liquid outlet 12; Collector plate 2 is arranged in liquid flow frame 1 center-aisle; Amberplex 4 is arranged between each collector plate 2, and amberplex 4 forms the cavity that holds electrolyte with collector plate 2; Electrode 3 is arranged in the cavity, and electrode 3 is configured to along 12 electrolyte flow direction ratio surface area increases gradually from inlet 11 to liquid outlet.
In embodiment one, the specific area of electrode 3 increases the increase gradually for noncontinuity gradually, and specifically, in conjunction with referring to Fig. 2 to Fig. 3, electrode 3 is made up of polylith cell electrode 31, cell electrode 32, cell electrode 33, cell electrode 34, cell electrode 35; Each cell electrode 31, cell electrode 32, cell electrode 33, cell electrode 34, cell electrode 35 have different specific surface, and the specific area between the adjacent cell electrode is increase gradually along the electrolyte flow direction.Embodiment one mainly is according to the preparation of electrode 3 materials or selects to control its difference of specific area everywhere.
The technical scheme of application implementation example one; Though 12 the flow process, reactive material concentration is along with the carrying out of reaction reduces electrolyte gradually in the electrolyte from inlet 11 to liquid outlet, the electrode 3 of the flow battery of embodiment one increases in the specific area of electrolyte flow direction gradually; Just the haptoreaction area increases gradually; Like this, can guarantee the reaction rate homogeneous, specifically; The reduction of offsetting reactive material concentration through the specific area that increases electrode 3; Reactive material concentration causes electrode reaction rate and the uneven problem of reaction generation heat everywhere, and then has improved the charge-discharge performance of battery and the problem in useful life along with the carrying out that reacts reduces gradually in the electrolyte thereby efficiently solve.
In embodiment two, the specific area of electrode 3 increases gradually to successional and increases gradually, and is as shown in Figure 4; Arrow is represented the electrolyte flow direction, and wherein, electrode 3 constitutes two half-cells with collector plate 2; The centre is an amberplex 4, and collector plate 2 outsides compress through bolt 16 and bolt 17.Each shape of cross section of electrode 3 is identical, and the specific area along the electrolyte flow direction of electrode 3 increases gradually.
The electrode 3 of the flow battery of embodiment two is successional increase gradually in the specific area of electrolyte flow direction; Just the haptoreaction area is successional increases gradually; Thereby offset the reduction of reactive material concentration; Reactive material concentration causes electrode reaction rate and the uneven problem of reaction generation heat everywhere, and then has improved the charge-discharge performance of battery and the problem in useful life along with the carrying out that reacts reduces gradually in the electrolyte thereby efficiently solve.
In embodiment three, the specific area of electrode 3 increases gradually to successional and increases gradually, and is as shown in Figure 5; Arrow is represented the electrolyte flow direction, and wherein, electrode 3 constitutes two half-cells with collector plate 2; The centre is an amberplex 4, and collector plate 2 outsides compress through bolt 16 and bolt 17.The area of each cross section of electrode 3 increases along the direction of electrolyte flow gradually.The electrode 3 of the flow battery of embodiment three is successional increase gradually in the specific area of electrolyte flow direction; Just the haptoreaction area is successional increases gradually; Thereby offset the reduction of reactive material concentration; Reactive material concentration causes electrode reaction rate and the uneven problem of reaction generation heat everywhere, and then has improved the charge-discharge performance of battery and the problem in useful life along with the carrying out that reacts reduces gradually in the electrolyte thereby efficiently solve.
In the above-described embodiments, preferably, electrode 3 is the conductivity porous material, is generally graphite felt or conductive plastics.
The utility model also provides a kind of liquid stream battery stack, comprises the flow battery of a plurality of series connection, and flow battery is above-mentioned flow battery.Above-mentioned flow battery is stacked successively the liquid stream battery stack that compresses and be composed in series the utility model.This liquid stream battery stack efficiently solves reactive material concentration in the electrolyte to be reduced along with the carrying out of reaction gradually, causes electrode reaction rate and reaction everywhere to produce the uneven problem of heat, and then has improved the problem in charge-discharge performance and useful life.
The utility model also provides a kind of flow battery system, comprising: liquid stream battery stack, electrolyte container and pump (not shown), and electrolyte container is communicated with the liquid flow frame 1 of battery pile through pump, and liquid stream battery stack is above-mentioned liquid stream battery stack.Other parts of this flow battery system see also related art, repeat no more at this.The flow battery system of the utility model efficiently solves reactive material concentration in the electrolyte and reduces gradually along with the carrying out of reaction; Cause electrode reaction rate and the uneven problem of reaction generation heat everywhere, and then improved the problem in charge-discharge performance and useful life.
Preferably, the flow battery system is the all-vanadium flow battery system.
Adopt the utility model technical scheme design vanadium redox battery, be exemplified below:
Example 1:
With high conductivity porous graphite felt as electrode material, with five specific area differences but identical graphite felt electrode and the hot pressing of graphite collector plate of overall dimension is integrated.Every graphite felt electrode size is 40mm * 200mm * 5mm, and the graphite felt electrode of forming a 200mm * 200mm * 5mm is whole, and the specific area of five cube electrodes increases progressively on flow field direction.It is 91.2% that the monocell that uses this graphite felt electrode and amberplex and collector plate to form discharges and recharges coulomb efficient, and voltage efficiency is 88.9%, and energy efficiency is 81.1%.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (10)
1. flow battery comprises:
Liquid flow frame (1) has center-aisle, and inlet (11) that is connected with said center-aisle and liquid outlet (12);
Collector plate (2) is arranged in said liquid flow frame (1) center-aisle;
Amberplex is arranged between each said collector plate (2), and said amberplex and said collector plate (2) form the cavity that holds electrolyte;
Electrode (3) is arranged in the said cavity,
It is characterized in that,
Said electrode (3) is configured to increase gradually along the said electrolyte flow direction ratio surface area from said inlet (11) to said liquid outlet (12).
2. flow battery according to claim 1 is characterized in that, the specific area of said electrode (3) increases the increase gradually for noncontinuity gradually.
3. flow battery according to claim 2 is characterized in that, said electrode (3) is made up of polylith cell electrode (31,32,33,34,35); Each said cell electrode (31,32,33,34,35) has different specific surface, and the specific area of adjacent said cell electrode (31,32,33,34,35) is increase gradually along said electrolyte flow direction.
4. flow battery according to claim 1 is characterized in that, the specific area of said electrode (3) increases gradually to successional and increases gradually.
5. flow battery according to claim 4 is characterized in that, each shape of cross section of said electrode (3) is identical, and the specific area along the electrolyte flow direction of said electrode (3) increases gradually.
6. flow battery according to claim 4 is characterized in that, the area of each cross section of said electrode (3) increases along the direction of said electrolyte flow gradually.
7. flow battery according to claim 1 is characterized in that, said electrode (3) is the conductivity porous material.
8. liquid stream battery stack comprises the flow battery of a plurality of series connection it is characterized in that said flow battery is each described flow battery in the claim 1 to 7.
9. flow battery system comprises: liquid stream battery stack, electrolyte container and pump, and said electrolyte container is communicated with the liquid flow frame (1) of said battery pile through said pump, it is characterized in that, and said liquid stream battery stack is the described liquid stream battery stack of claim 8.
10. flow battery according to claim 9 system is characterized in that, said flow battery system is the all-vanadium flow battery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202533801U CN202127060U (en) | 2011-07-18 | 2011-07-18 | Flow battery, flow battery stack and flow battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202533801U CN202127060U (en) | 2011-07-18 | 2011-07-18 | Flow battery, flow battery stack and flow battery system |
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| Publication Number | Publication Date |
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| CN202127060U true CN202127060U (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202533801U Expired - Lifetime CN202127060U (en) | 2011-07-18 | 2011-07-18 | Flow battery, flow battery stack and flow battery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290591A (en) * | 2011-07-18 | 2011-12-21 | 中国东方电气集团有限公司 | Redox flow cell, redox flow cell stack and redox flow cell system |
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2011
- 2011-07-18 CN CN2011202533801U patent/CN202127060U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290591A (en) * | 2011-07-18 | 2011-12-21 | 中国东方电气集团有限公司 | Redox flow cell, redox flow cell stack and redox flow cell system |
| CN102290591B (en) * | 2011-07-18 | 2014-03-26 | 中国东方电气集团有限公司 | Redox flow cell, redox flow cell stack and redox flow cell system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120125 Effective date of abandoning: 20140326 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120125 Effective date of abandoning: 20140326 |