CN104659390A - Flow battery stack and method for improving voltage abnormity at flow battery end - Google Patents
Flow battery stack and method for improving voltage abnormity at flow battery end Download PDFInfo
- Publication number
- CN104659390A CN104659390A CN201310578971.XA CN201310578971A CN104659390A CN 104659390 A CN104659390 A CN 104659390A CN 201310578971 A CN201310578971 A CN 201310578971A CN 104659390 A CN104659390 A CN 104659390A
- Authority
- CN
- China
- Prior art keywords
- graphite
- pile
- conductive layer
- flow battery
- carbon
- 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.)
- Pending
Links
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
- H01M8/02—Details
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04865—Voltage
- H01M8/04873—Voltage of the individual fuel cell
-
- 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)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to a flow battery stack and a method for improving voltage abnormity at a flow battery end, and belongs to the field of flow batteries. The flow battery stack comprises an end plate, a current-collecting plate and a bipolar plate from an outermost side to the inside, wherein a conducting layer is arranged between the current-collecting plate and the bipolar plate; and the conducting layer is made of a conducting material of which the electrical resistivity is less than 0.5omega.cm. The conducting layer is arranged between the bipolar plate and the current-collecting plate, so that the voltage abnormity at a stack end is improved effectively; the voltage uniformity among single batteries in the stack is ensured; the stack performance is enhanced; and meanwhile, the service life of the stack is greatly prolonged.
Description
Technical field
The present invention relates to a kind of flow cell pile and improve the method for flow battery terminal voltage exception, belong to flow battery field.
Background technology
The situation of worldwide energy shortage and environment exacerbated impels the cry of countries in the world development and utilization regenerative resource to grow to even greater heights.But, all there is the unsteadiness of energy supply, need the energy-storage system of function admirable supporting with it in no matter solar energy or wind energy.The advantages such as it is good that flow battery has fail safe, and reliability is high, and flexible design responds fast, and the life-span is long are desirable scale energy storage devices.
The pile of flow battery is fixed together with filter press form primarily of after multiple monocell superposition, and outermost respectively is the end plate of fastening pile and the collector plate of collected current, for reaching the effect of good collected current, collector plate many employings copper coin.In existing electric pile structure, the bipolar plates being in the end cell (being in the outermost monocell in pile two ends in flow battery) of outermost end often directly contacts with collector plate, because the material of bipolar plates and collector plate, composition, adjacent surface surface state differ widely, although pile makes both be closely contacted to together when assembling by external pressure, but still there is larger contact resistance between the two, the internal resistance of end cell is caused obviously to increase, and then increase the internal resistance of pile, affect the performance and used life of pile.More fatal is, owing to addition of the contact resistance between the bipolar plates of end cell and collector plate, the voltage of end cell (voltage of end cell) often apparently higher than or lower than the voltage of other monocells, serious situation can reach millivolt up to a hundred with pile average voltage deviations, has had a strong impact on the voltage uniformity of pile entirety.When pile be in for a long time run under this kind of situation time, the end cell of pile is due under being in high voltage or larger current for a long time during discharge and recharge, in the course of time, be in pile two side ends battery pole fragile, reduce useful life and the efficiency for charge-discharge of pile, also considerably increase workload and the expense of later period maintenance maintenance.Therefore, be necessary to develop a kind of New galvanic battery electric pile structure particularly end cell structure, thus effectively improve the present situation of pile end cell electric voltage exception.
Summary of the invention
The object of this invention is to provide a kind of flow cell pile.
A kind of flow cell pile, described pile inwardly comprises end plate, collector plate and bipolar plates by outermost, is provided with conductive layer between described collector plate and bipolar plates, and described conductive layer material therefor is the electric conducting material that resistivity is less than 0.5 Ω cm.
Pile is formed primarily of barrier film, bipolar plates, electrode, electrode frame, end plate, seal and securing member, and wherein, pile both sides outermost end is located at by end plate, for fastening whole pile.In prior art, be inwardly followed successively by the bipolar plates of the end cell of end plate, collector plate and outermost end by outermost.Technical scheme of the present invention is: between the bipolar plates of the end cell of collector plate and outermost end, arrange conductive layer, and described conductive layer material therefor is resistivity is less than the electric conducting material of 0.5 Ω cm, utilize the contact resistance between this conductive layer reduction collector plate and bipolar plates, ensure the uniformity of pile global voltage.
Electric conducting material of the present invention is preferably material with carbon element, more preferably carbon fibre composite or graphite product.
Carbon fibre composite of the present invention is preferably graphite fiber composite materials, oxidization fiber carbonized stock, carbon cloth, carbon felt or carbon rope and braid thereof.
Graphite product of the present invention is preferably the composite material of aquadag, crystalline flake graphite, micro powder graphite, nano-graphite, superfine graphite, aquadag, high purity graphite, amorphous graphite, high connductivity graphite, expansible graphite or above-mentioned material.
The composite material of aquadag of the present invention, crystalline flake graphite, micro powder graphite, nano-graphite, superfine graphite, aquadag, high purity graphite, amorphous graphite, high connductivity graphite, expansible graphite refers to above-mentioned material and other materials, as plate body, block or particulate composite that resin compounded is formed.
In all technical schemes of flow cell pile of the present invention, the thickness of all preferred described conductive layer is 0.01 ~ 2mm, more preferably 0.5mm.
Another object of the present invention is to provide a kind of method improving flow battery terminal voltage exception.
Improve a method for flow battery terminal voltage exception, between collector plate and bipolar plates, arrange conductive layer, described conductive layer material therefor is conductivity is the electric conducting material that resistivity is less than 0.5 Ω cm.
Beneficial effect of the present invention is: by arranging conductive layer between bipolar plates and collector plate, effective situation improving pile terminal voltage exception, ensure that the voltage homogeneity between each joint monocell in pile, improve Performance data, greatly extend the useful life of pile simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of flow cell pile end plate partial schematic diagram;
Fig. 2 (a) is end plate floor map;
Fig. 2 (b) is insulating lining floor map;
Fig. 2 (c) is collector plate floor map;
Fig. 2 (d) is conductive layer floor map;
Fig. 2 (e) is bipolar plates floor map;
Reference numeral is as follows: 1, end plate; 2, insulating lining; 3, collector plate; 4, conductive layer; 5, bipolar plates.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
The present invention's aquadag used, carbon cloth, graphite powder are purchased from Qingdao Xing Yuan aquadag Co., Ltd.
Embodiment 1
As shown in Figure 1, a kind of flow cell pile, described pile inwardly comprises end plate 1, insulating lining 2, collector plate 3 and bipolar plates 5 by outermost, is provided with conductive layer 4 between described collector plate 3 and bipolar plates 5, and described conductive layer 4 material therefor is aquadag.
Described aquadag has good film forming and tack, satisfactory electrical conductivity, and coating is firm, fast drying, forms corrosion resistant conductive film after dry.
Flow cell pile parameter is:
2kw flow battery, 10 joint monocells, two-side current collecting plate 3 is the aquadag of 0.02mm with coating thickness on bipolar plates 5 contact-making surface, and collector plate 3 is copper coin, at 110mA/cm
2run battery one month under condition, table 1 and 2 have recorded the change of monocell extreme difference and battery performance change respectively.
Coulombic efficiency: the ratio referring to discharge capacity of the cell and charging capacity in same cyclic process.
Voltage efficiency: electric discharge average voltage is divided by charging average voltage.
Energy efficiency: under identical current density, releases electricity divided by being filled with electricity.
Table 1 univoltage extreme difference changes
Table 2 battery performance change contrast
| Battery | Coulombic efficiency (%) | Voltage efficiency (%) | Energy efficiency (%) |
| Untreated | 94.5 | 84.3 | 79.7 |
| After process | 94.6 | 86.8 | 82.1 |
Embodiment 2
As shown in Figure 1, a kind of flow cell pile, described pile inwardly comprises end plate 1, liner plate 2, collector plate 3 and bipolar plates 5 by outermost, is provided with conductive layer 4 between described collector plate 3 and bipolar plates 5, and described conductive layer 4 material therefor is carbon cloth.
Flow cell pile parameter is:
2kw flow battery, 10 joint monocells, carbon cloth thickness is 0.6mm, at 110mA/cm
2run battery one month under condition, record battery extreme difference changes, and battery performance changes;
Table 3 univoltage extreme difference changes
Table 4 battery performance change contrast
| Battery | Coulombic efficiency (%) | Voltage efficiency (%) | Energy efficiency (%) |
| Untreated | 93.8 | 84.2 | 79.0 |
| After process | 94.0 | 86.5 | 81.3 |
Embodiment 3
A kind of flow cell pile, described pile inwardly comprises end plate 1, liner plate 2, collector plate 3 and bipolar plates 5 by outermost, is provided with conductive layer 4 between described collector plate 3 and bipolar plates 5, the graphite powder that described conductive layer 4 launches for uniform spreading.
Flow cell pile parameter is:
2kw flow battery, 10 joint monocells, graphite powder thickness is 0.1mm, at 110mA/cm
2run battery one month under condition, record battery extreme difference changes, and battery performance changes;
Table 5 univoltage extreme difference changes
Table 6 battery performance change contrast
| Battery | Coulombic efficiency (%) | Voltage efficiency (%) | Energy efficiency (%) |
| Untreated | 94.3 | 84.3 | 79.5 |
| After process | 94.6 | 86.8 | 82.1 |
Claims (9)
1. a flow cell pile, described pile inwardly comprises end plate, collector plate and bipolar plates by outermost, it is characterized in that: be provided with conductive layer between described collector plate and bipolar plates, and described conductive layer material therefor is the electric conducting material that resistivity is less than 0.5 Ω cm.
2. pile according to claim 1, is characterized in that: described electric conducting material is material with carbon element.
3. pile according to claim 2, is characterized in that: described material with carbon element is carbon fibre composite.
4. pile according to claim 3, is characterized in that: described carbon fibre composite is graphite fiber composite materials, oxidization fiber carbonized stock, carbon cloth, carbon felt or carbon rope braid.
5. pile according to claim 2, is characterized in that: described material with carbon element is graphite product.
6. pile according to claim 5, is characterized in that: described graphite product is the composite material of aquadag, crystalline flake graphite, micro powder graphite, nano-graphite, superfine graphite, aquadag, high purity graphite, amorphous graphite, high connductivity graphite, expansible graphite or above-mentioned material.
7. pile according to claim 1, is characterized in that: the thickness of described conductive layer is 0.01 ~ 2mm.
8. pile according to claim 1, is characterized in that: be also provided with liner plate between the end plate of described pile and collector plate.
9. improve a method for flow battery terminal voltage exception, it is characterized in that: between collector plate and bipolar plates, arrange conductive layer, described conductive layer material therefor is the electric conducting material that resistivity is less than 0.5 Ω cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310578971.XA CN104659390A (en) | 2013-11-15 | 2013-11-15 | Flow battery stack and method for improving voltage abnormity at flow battery end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310578971.XA CN104659390A (en) | 2013-11-15 | 2013-11-15 | Flow battery stack and method for improving voltage abnormity at flow battery end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104659390A true CN104659390A (en) | 2015-05-27 |
Family
ID=53250266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310578971.XA Pending CN104659390A (en) | 2013-11-15 | 2013-11-15 | Flow battery stack and method for improving voltage abnormity at flow battery end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104659390A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450404A (en) * | 2015-07-27 | 2017-02-22 | 大连融科储能技术发展有限公司 | Redox flow cell stack |
| CN106450405A (en) * | 2015-07-27 | 2017-02-22 | 大连融科储能技术发展有限公司 | Flow battery stack structure |
| CN111564643A (en) * | 2020-05-09 | 2020-08-21 | 承德新新钒钛储能科技有限公司 | End plate structure of flow battery |
| CN115663225A (en) * | 2022-12-27 | 2023-01-31 | 杭州德海艾科能源科技有限公司 | Preparation method of flow battery composite collector plate |
| CN117096370A (en) * | 2023-10-17 | 2023-11-21 | 江苏恒安储能科技有限公司 | Novel flow battery terminal electrode and flow battery assembled by same |
-
2013
- 2013-11-15 CN CN201310578971.XA patent/CN104659390A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450404A (en) * | 2015-07-27 | 2017-02-22 | 大连融科储能技术发展有限公司 | Redox flow cell stack |
| CN106450405A (en) * | 2015-07-27 | 2017-02-22 | 大连融科储能技术发展有限公司 | Flow battery stack structure |
| CN106450405B (en) * | 2015-07-27 | 2019-11-26 | 大连融科储能技术发展有限公司 | Flow cell pile structure |
| CN111564643A (en) * | 2020-05-09 | 2020-08-21 | 承德新新钒钛储能科技有限公司 | End plate structure of flow battery |
| CN111564643B (en) * | 2020-05-09 | 2022-02-22 | 承德新新钒钛储能科技有限公司 | End plate structure of flow battery |
| CN115663225A (en) * | 2022-12-27 | 2023-01-31 | 杭州德海艾科能源科技有限公司 | Preparation method of flow battery composite collector plate |
| CN117096370A (en) * | 2023-10-17 | 2023-11-21 | 江苏恒安储能科技有限公司 | Novel flow battery terminal electrode and flow battery assembled by same |
| CN117096370B (en) * | 2023-10-17 | 2024-01-09 | 江苏恒安储能科技有限公司 | Novel flow battery terminal electrode and flow battery assembled by same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107681115B (en) | Negative plate of lithium slurry battery | |
| KR101478814B1 (en) | A electrode structure with multi coating layers having active materials consisting of different sizes, and secondary battery containing the same. | |
| US9806337B2 (en) | Electrode structure having alternating composite layers | |
| CN105355457A (en) | Lithium ion capacitor and formation method thereof | |
| CN104795583A (en) | Novel lithium ion flow battery | |
| CN104659390A (en) | Flow battery stack and method for improving voltage abnormity at flow battery end | |
| CN109546080A (en) | A kind of anode pole piece, and its preparation method and application | |
| CN110729529A (en) | Energy storage battery cell with composite electrode structure and method for pre-embedding lithium in battery cell | |
| JP2013042134A (en) | Electrodes for electrochemical capacitor and electrochemical capacitor including the same | |
| CN103000390B (en) | A kind of negative pole currect collecting preparation and use the ultracapacitor of this collector | |
| CN103545530B (en) | Collector, lithium ion cell electrode and lithium ion battery | |
| CN101465416A (en) | High specific capacity composite electrode pole piece for lithium ion battery | |
| CN101894682A (en) | High-energy ultracapacitor | |
| CN112825354A (en) | Lithium negative electrode, preparation method thereof and lithium secondary battery | |
| CN103035925A (en) | Lithium-ion power battery, lithium-ion power battery current collecting body, negative electrode pole piece | |
| KR20120129569A (en) | Hybrid capacitor | |
| CN105390298A (en) | Lithium ion capacitor negative unit, cell and lithium ion capacitor | |
| CN104752687A (en) | Production method of polymer lithium ion battery positive and negative current collectors | |
| CN209880409U (en) | Capacitor based on mass transfer reduction and diffusion control multilayer electrode | |
| CN107221699A (en) | A kind of novel high voltage lithium ion battery and energy storage elements based on silicium cathode | |
| CN106876714A (en) | A kind of lithium ion battery for automobile starting/stopping system | |
| CN104953169A (en) | Lithium ion low-temperature battery | |
| CN110323483A (en) | Secondary cell and preparation method thereof with include its power device | |
| CN210074034U (en) | Lithium ion battery negative plate and lithium ion battery | |
| CN115172663A (en) | Composite negative pole piece and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |