CN208889773U - A kind of flow battery electrode frame structure - Google Patents
A kind of flow battery electrode frame structure Download PDFInfo
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- CN208889773U CN208889773U CN201821601421.XU CN201821601421U CN208889773U CN 208889773 U CN208889773 U CN 208889773U CN 201821601421 U CN201821601421 U CN 201821601421U CN 208889773 U CN208889773 U CN 208889773U
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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
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Abstract
The utility model relates to flow battery energy storage technical field, in particular to electrolyte inlet and electrolyte outlet is arranged in electric quadrangle in a kind of flow battery electrode frame structure；Middle part is equipped with the through-hole of accommodating porous electrode；In on one side surface of electrode frame, liquid distribution groove is respectively equipped with respect to two sides in middle through-hole；Electrolyte outlet is located at plate upper left side, outlet sprue groove is divided into two up and down, liquid distribution groove is divided into left and right two out, and the outlet sprue groove on top is connected with the top half of electrolyte outlet, and the outlet sprue groove of lower part is connected with the lower half portion of electrolyte outlet；The outlet sprue groove right end on top is connected with the liquid distribution groove left end that goes out on right side, and the outlet sprue groove right end of lower part is connected with the liquid distribution groove left end that goes out in left side；Electrolyte inlet and outlet are symmetrical.The utility model increases electrolyte circulation area；Reduce flow resistance.
Description
Technical field
The utility model relates to flow battery energy storage technical field, in particular to a kind of all-vanadium flow battery field.
Background technique
All-vanadium flow battery is a kind of high efficiency, high reliability, the flow battery energy storage technology of long life, have compared with
High power density, device are simply steerable.Electrolyte is stored in the electrolyte bucket outside pile, can be by increasing electrolyte
Storage capacity improves stored energy capacitance.Which are mainly applied to the fields such as the renewable energy power generations such as peak load regulation network, wind energy and solar energy.
Electrode frame accepts carbon modeling composite dual-electrode plates and diaphragm as component part important in electric pile structure, and realizes electrolyte
Sealing and distribution the effects of.Existing vanadium redox flow battery electrode frame has the disadvantage in that 1. electrolyte inlet and outlet sprue is recessed
Slot circulation area is too small, and flow resistance is larger, reduces the flow of pile, reduces electrolyte flow rate；2. the inlet and outlet in electrode frame
Sprue groove is turned back with biggish, causes biggish flow resistance, reduces electrolyte flow rate；3. importing and exporting liquid separation runner circulating face
Product very little, and designed using flaring, reduce the flow velocity of electrolyte.Since all-vanadium flow battery depth of discharge is deeper, if
Electrolyte flow rate is too low, and it is larger to will lead to concentration polarization in electrode in charge and discharge latter stage, reduces battery performance.
Utility model content
The utility model is in order to solve the above technical problems, provide a kind of electrode of liquid flow cell mount structure.Electrolyte disengaging
Mouth sprue groove is divided into two up and down, significantly increases electrolyte circulation area；The bending angle for reducing sprue, subtracts
Small flow resistance；Increase inlet and outlet liquid separation runner circulation area, and use tapered design, secondary add is played to electrolyte
The effect of speed.
To achieve the above object, the utility model uses following technical scheme:
Electrode frame is rectangular plate；Through-hole is respectively set close to the edge of quadrangle in electrode frame, through-hole is made respectively everywhere
For electrolyte inlet and electrolyte outlet；Be provided in the middle part of rectangular plate a hollow out, the square of porous electrode can be accommodated
Shape middle through-hole；In on one side surface of electrode frame, distinguish in the electrode frame surface on opposite two sides close to rectangular central portion through-hole
Groove is distributed equipped with upper and lower two liquid, groove is distributed respectively as electrolyte feed liquor and electrolyte goes out liquid distribution groove, feed liquor
Distribution groove be connected by import sprue groove with electrolyte inlet, out liquid distribution groove by export sprue groove and
Electrolyte outlet is connected；Feed liquor distribution groove is connected through import liquid separation runner with middle through-hole, and liquid distributes groove through going out out
Mouth liquid separation runner (or groove) is connected with middle through-hole.Electrolyte outlet is located at plate upper left side, outlet sprue groove point
At upper and lower two, liquid distribution groove is divided into left and right two, the upper half of outlet the sprue groove and electrolyte outlet on top out
Split-phase connection, the outlet sprue groove of lower part are connected with the lower half portion of electrolyte outlet；The outlet sprue on top is recessed
Slot right end is connected with the liquid distribution groove left end that goes out on right side, and the outlet sprue groove right end of lower part and the liquid that goes out in left side distribute
Groove left end is connected；Exporting the liquid separation runner section parallel with rectangular plate plate face is inverted trapezoidal, out liquid distribution groove warp
Outlet liquid separation runner is connected with middle through-hole.Electrolyte inlet is located at plate lower right, and import sprue groove is divided into up and down
Two, feed liquor distribution groove is divided into left and right two, and the import sprue groove on top is connected with the top half of electrolyte inlet
Logical, the import sprue groove of lower part is connected with the lower half portion of electrolyte inlet；The import sprue groove left end on top
It is connected with the feed liquor on right side distribution groove right end, the import sprue groove left end of lower part and the feed liquor distribution groove in left side are right
End is connected；The import liquid separation runner section parallel with rectangular plate plate face be it is trapezoidal, feed liquor distribute groove through import liquid separation
Runner is connected with middle through-hole.Outlet master of the 180 degree arc angle region with top where the top half of electrolyte outlet
Flow path groove is connected；Outlet mainstream of the 120-180 degree arc angle region with lower part where the lower half portion of electrolyte outlet
Road groove is connected；Import sprue of the 120-180 degree arc angle region with top where the top half of electrolyte inlet
Groove is connected；Import sprue groove phase of the 180 degree arc angle region with lower part where the lower half portion of electrolyte inlet
Connection.Export sprue groove, go out liquid distribution groove, outlet liquid separation runner, import sprue groove, feed liquor distribution groove, into
It is equipped with cover plate on mouth liquid separation runner, runner blocks when preventing gasket from compressing.
The utility model by adopting the above technical scheme, compared with prior art, has the following technical effect that
Electrolyte inlet and outlet sprue groove is divided into two up and down, compared with the prior art, imports and exports sprue groove stream
Logical area improves 75%；Simultaneously because the import sprue groove left end on top is connected with the feed liquor on right side distribution groove right end
Logical, the outlet sprue groove right end of lower part is connected with the liquid distribution groove left end that goes out in left side, reduces sprue groove
It turns back angle, reduces flow resistance, make electrolyte when reaching liquid separation runner by more uniform distribution.In addition to this, it mentions
The high circulation area of import liquid separation runner, and can also be to electricity while increasing flow of electrolyte using tapered design
It solves liquid and carries out secondary acceleration, further promote flowing velocity of the electrolyte in electrode.Since upper inlet sprue groove is under
It is shorter compared to the process of lower inlet sprue groove and upper outlet sprue groove to export sprue groove, therefore can be according to electricity
Solve the connection of the attribute of liquid, adjustment upper inlet sprue groove and lower outlet sprue groove and catholyte inlet and outlet through-hole
Angle is led with reaching balance upper inlet sprue groove and lower inlet sprue groove, upper outlet sprue groove and lower outlet
The purpose of flow path groove flow resistance, so that the flow uniformity of electrolyte is more preferable.Electrode frame is greatly reduced in the utility model
To the resistance of electrolyte flow, it can be promoted in the case where the lift of guarantee electrolyte pump is constant and pass through all-vanadium flow pile
Flow of electrolyte, increase electrolyte flow speed, mass transfer enhancement, reduce concentration polarization, improve battery performance.
Detailed description of the invention
Fig. 1 conventional electrodes mount structure.
The electrode frame structure of Fig. 2 the utility model embodiment.
Specific embodiment
Comparative example
The traditional electrode mount structure of all-vanadium flow battery is as shown in Figure 1.It is set respectively in electrode frame close to the edge of quadrangle
Through-hole is set, through-hole is respectively as electrolyte inlet and electrolyte outlet everywhere；A hollow out is provided in the middle part of rectangular plate
, the rectangular central portion through-hole that porous electrode can be accommodated；In on one side surface of electrode frame, in close to opposite the two of rectangular central portion through-hole
The electrode frame surface on side is respectively equipped with upper and lower two liquid distribution groove, distributes groove and electricity respectively as electrolyte feed liquor
Solution liquid goes out liquid distribution groove, and feed liquor distribution groove is connected by import sprue groove with electrolyte inlet, and liquid distribution is recessed out
Slot is connected by outlet sprue groove with electrolyte outlet；Feed liquor distributes groove through import liquid separation runner and middle through-hole phase
Connection, liquid distribution groove is connected through outlet liquid separation runner (or groove) with middle through-hole out；A pole of the electrode frame as battery
Play the role of tissue electrolyte flow and support electrode at work.Electrolyte inlet cross-sectional length is 16.75mm.A part
Electrolyte flow to electrode frame center via electrolyte inlet through-hole, by import sprue groove, flows into through import distribution groove
Import liquid separation runner.After electrolyte reacts in porous electrode region, it is flow to electrode frame center via outlet distribution groove, through exporting
Sprue groove flows out electrode frame.Importing and exporting sprue groove section width is 8mm.Import liquid separation runner, outlet liquid separation runner
It is all made of flaring design, the section width that import liquid separation runner, outlet liquid separation runner and porous electrode have a common boundary is 3mm.
Electrode area: 875cm2。
Pile joint number: 10 sections
Current density: 80mA/cm2, charge cutoff voltage: 15.5V, discharge cut-off voltage: 10V
Pile charge and discharge coulombic efficiency 99.1%, voltage efficiency 87.2%, energy efficiency 86.4%
Embodiment
Vanadium redox flow battery electrode frame is as shown in Figure 2.In embodiment, electrolyte inlet cross-sectional length is 31.4mm-
37.7mm, a part of electrolyte are distributed via right side import by upper inlet sprue groove and are flowed via electrolyte inlet through-hole
Road groove flows into import liquid separation runner, and import liquid separation runner uses tapered design, and electrolyte enters right half after secondary acceleration
Lateral electrode frame, remaining electrolyte flow into import liquid separation through left side import distribution flow path groove import along lower inlet sprue groove
Runner flows into left half electrode frame after secondary acceleration.After electrolyte reacts in porous electrode region, a part goes out via lower part
Mouth sprue flows out electrode frame via left side outlet distribution flow path groove, and remaining electrolyte is passed through through right-side outlet distribution flow path groove
Electrode frame is flowed out by upper outlet sprue groove.Import sprue groove and outlet sprue groove, cross section of fluid channel beam overall are equal
For 14mm, import liquid separation runner uses tapered design, the section that import liquid separation runner, outlet liquid separation runner and porous electrode have a common boundary
Width is 6mm.
In embodiment, the connection area of electrolyte inlet and outlet sprue groove and electrolyte inlet and outlet through-hole is comparative example
1.87-2.25 times, the flow cross-section areas of inlet and outlet sprue groove is 1.75 times of comparative example, and import liquid separation runner goes out
The area of section that mouth liquid separation runner and porous electrode have a common boundary is 2 times of comparative example.Inlet and outlet distribution flow path groove avoids larger
Turn back, greatly reduce the flow resistance that electrolyte flows in electrode frame, flow pump lift it is constant in the case where, Neng Gouzeng
Big flow of electrolyte improves electrolyte flow rate.Import liquid separation runner uses tapered design, plays secondary acceleration to electrolyte and makees
With further improving electrolyte flow rate.
Electrode area: 875cm2。
Pile joint number: 10 sections
Current density: 80mA/cm2, charge cutoff voltage: 15.5V, discharge cut-off voltage: 10V
Pile charge and discharge coulombic efficiency 99.3%, voltage efficiency 89.2%, energy efficiency 88.6%
Table 1: battery performance comparison
| Pile serial number | Coulombic efficiency % | Voltage efficiency % | Energy efficiency % |
| Comparative example | 99.1 | 87.2 | 86.4 |
| Embodiment | 99.2 | 89.2 | 88.6 |
It is compared by battery performance as can be seen that using the electrode frame of the utility model, the performance of all-vanadium flow pile is wanted
It is substantially better than the performance of the all-vanadium flow pile using traditional electrode frame, illustrating can be effective using the electrode frame of the utility model
Electrolyte flow rate is promoted, enhancing active material reduces concentration polarization in the mass transfer ability of electrode interior, improves battery performance.
Claims (3)
1. a kind of flow battery electrode frame structure, electrode frame are rectangular plate, distinguish in electrode frame close to the edge of quadrangle
Through-hole is set, and through-hole is respectively as electrolyte inlet and electrolyte outlet everywhere；One is provided in the middle part of rectangular plate to engrave
The rectangular central portion through-hole empty, porous electrode can be accommodated；In on one side surface of electrode frame, in close to the opposite of rectangular central portion through-hole
The electrode frame surface on two sides is respectively equipped with upper and lower two liquid distribution groove, respectively as electrolyte feed liquor distribution groove and
Electrolyte goes out liquid distribution groove, and feed liquor distribution groove is connected by import sprue groove with electrolyte inlet, and liquid distributes out
Groove is connected by outlet sprue groove with electrolyte outlet；Feed liquor distribution groove is through import liquid separation runner or groove in
Portion's through-hole is connected, and liquid distribution groove is connected through outlet liquid separation runner or groove with middle through-hole out；
It is characterized by: electrolyte outlet is located at plate upper left side, outlet sprue groove is divided into two up and down, and liquid distribution is recessed out
Slot is divided into left and right two, and the outlet sprue groove on top is connected with the top half of electrolyte outlet, the outlet master of lower part
Flow path groove is connected with the lower half portion of electrolyte outlet；The outlet sprue groove right end on top and the liquid that goes out on right side distribute
Groove left end is connected, and the outlet sprue groove right end of lower part is connected with the liquid distribution groove left end that goes out in left side；Outlet point
The liquid stream road section parallel with rectangular plate plate face is inverted trapezoidal, and liquid distribution groove is through outlet liquid separation runner and middle through-hole out
It is connected；
Electrolyte inlet is located at plate lower right, and import sprue groove is divided into two up and down, and feed liquor distribution groove is divided into left and right
Two, the import sprue groove on top is connected with the top half of electrolyte inlet, the import sprue groove of lower part with
The lower half portion of electrolyte inlet is connected；The import sprue groove left end on top and the feed liquor on right side distribute groove right end phase
The import sprue groove left end of connection, lower part is connected with the feed liquor in left side distribution groove right end；Import liquid separation runner and square
The parallel section of shape plate plate face be it is trapezoidal, feed liquor distribution groove be connected through import liquid separation runner with middle through-hole.
2. according to electrode frame structure described in claim 1, it is characterised in that: the 180 degree where the top half of electrolyte outlet
Arc angle region is connected with the outlet sprue groove on top；120-180 degree arc where the lower half portion of electrolyte outlet
Angular zone is connected with the outlet sprue groove of lower part；
120-180 degree arc angle region where the top half of electrolyte inlet is connected with the import sprue groove on top
It is logical；180 degree arc angle region where the lower half portion of electrolyte inlet is connected with the import sprue groove of lower part.
3. according to electrode frame structure described in claim 1, it is characterised in that: outlet sprue groove goes out liquid distribution groove, outlet
Liquid separation runner, feed liquor distribution groove, is equipped with cover plate on import liquid separation runner at import sprue groove, prevents gasket from compressing
Shi Liudao blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601421.XU CN208889773U (en) | 2018-09-29 | 2018-09-29 | A kind of flow battery electrode frame structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601421.XU CN208889773U (en) | 2018-09-29 | 2018-09-29 | A kind of flow battery electrode frame structure |
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| Publication Number | Publication Date |
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| CN208889773U true CN208889773U (en) | 2019-05-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970634A (en) * | 2018-09-29 | 2020-04-07 | 中国科学院大连化学物理研究所 | Electrode frame for all-vanadium redox flow battery and application |
| CN114597438A (en) * | 2020-12-03 | 2022-06-07 | 中国科学院大连化学物理研究所 | Novel electrode frame and zinc-bromine flow battery |
-
2018
- 2018-09-29 CN CN201821601421.XU patent/CN208889773U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970634A (en) * | 2018-09-29 | 2020-04-07 | 中国科学院大连化学物理研究所 | Electrode frame for all-vanadium redox flow battery and application |
| CN114597438A (en) * | 2020-12-03 | 2022-06-07 | 中国科学院大连化学物理研究所 | Novel electrode frame and zinc-bromine flow battery |
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