CN106876745A - A kind of flow battery bipolar plates containing speed change runner - Google Patents
A kind of flow battery bipolar plates containing speed change runner Download PDFInfo
- Publication number
- CN106876745A CN106876745A CN201510926413.7A CN201510926413A CN106876745A CN 106876745 A CN106876745 A CN 106876745A CN 201510926413 A CN201510926413 A CN 201510926413A CN 106876745 A CN106876745 A CN 106876745A
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- China
- Prior art keywords
- runner
- electrolyte
- liquid
- depth
- bipolar plates
- Prior art date
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Classifications
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- 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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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
Abstract
The present invention relates to a kind of flow battery bipolar plates containing speed change runner, it is by carrying out scientific and reasonable improvement and integration to liquid flow frame of the prior art and bipolar plate structure, can realize that electrolyte gradually increases along liquid in-out mouthful direction speed, influence of the concentration polarization caused with velocity gradient equilibrium concentration gradient to battery performance, potted component quantity is reduced simultaneously, reduce the purpose of thickness of electrode, so as to simplify pile assembly technology, reduce electrolyte leakage in pile, battery ohmic internal resistance is reduced, the stability and battery performance of battery operation is improved.
Description
Technical field
The present invention relates to flow battery field, particularly a kind of flow battery bipolar plates containing speed change runner.
Background technology
Flow battery, be the vanadium ion solution using different valence state as both positive and negative polarity electrolyte, driven by external pump
Dynamic electrolyte is circulated between fluid reservoir and pile, and electrolyte occurs redox reaction reality in pile
The battery of existing charge and discharge process.Flow battery is made up of pipe-line systems such as pile, electrolyte and pumps, pile bag
Include ionic conduction barrier film, liquid flow frame, electrode, bipolar plates and collector plate etc..Pile cell is passed with ion
Lead centered on barrier film, two ends are followed successively by：Electrode and liquid flow frame, bipolar plate structure.Ionic conduction barrier film and liquid
Between stream frame, there is potted component between liquid flow frame and bipolar plates.10 grades of cells of several levels or number are clamped in
Between two stainless steel end plates, a pile is constituted through filter press pressuring action.Electrolyte is in fluid reservoir and electricity
Circulated between heap, wherein must be by liquid flow frame, liquid flow frame plays distribution electrolyte in pile and exists
The type of flow in pile, prevent the effect that electrolyte leaks outside；Potted component mainly electrolyte is played sealing,
Prevent leakage from acting on；Bipolar plates mainly play each cell in separation pile and collect, convey electric current
Effect.Because liquid flow frame, potted component and bipolar plates play indispensable effect to pile, its structure and
Material will directly affect the stability and battery performance of flow battery.
At present, even depth electrode putting groove is provided with general liquid flow frame, electrolyte is along liquid in-out mouthful direction
Flowing velocity is basically identical, but with the carrying out of reaction, is gradually reduced along liquid in-out mouthful orienting response thing concentration,
Generally cause gradually to increase along liquid in-out mouthful direction concentration polarization, especially in discharge and recharge latter stage or high current
Influence notable under density, cause battery overall performance to decline.Meanwhile, general liquid flow frame and bipolar plates at present
It is two independent structures, potted component must be added between the two during composition pile.Liquid flow frame is generally used
PVC material, bipolar plates use non-porous graphite material, metal or alloy material and various composites, sealing
Structure typically has face to seal or linear sealing two ways.Liquid flow frame, potted component, bipolar plates, liquid flow frame,
Potted component, bipolar plates ... assembly process it is cumbersome, if assembling is unreasonable, easily cause electrolyte to leak outside,
Influence the stable operation of battery；And, potted component cost is also higher；Additionally, liquid flow frame should typically have
The effect for preventing electrolyte from leaking outside, therefore during processing, the thickness of liquid flow frame is than the flow channel depth on liquid flow frame
Big 1mm or so, corresponding thickness of electrode is larger, causes larger ohmic internal resistance, and then influence battery performance.
The content of the invention
The purpose of the present invention is, for the problem that prior art is present, to overcome defect of the prior art,
A kind of flow battery bipolar plates containing speed change runner are proposed and study, it is by liquid stream of the prior art
Frame and bipolar plate structure carry out scientific and reasonable improvement and integration, it is possible to achieve electrolyte is along liquid in-out mouth side
Gradually increase to speed, influence of the concentration polarization caused with velocity gradient equilibrium concentration gradient to battery performance,
Potted component quantity is reduced simultaneously, reduces the purpose of thickness of electrode, so as to simplify pile assembly technology, reduce
Electrolyte leakage in pile, reduces battery ohmic internal resistance, improves the stability and battery performance of battery operation.
Brief description of the drawings
Fig. 1：Bipolar plates in the middle of flow cell pile；
Fig. 2：First bipolar plates of flow cell pile；
Fig. 3：Last bipolar plates of flow cell pile；
In figure：1- positive poles enter fluid through-hole, and 2- negative poles go out fluid through-hole, and 3- anode electrolyte runners, 4- positive poles go out
Fluid through-hole, 5- negative poles enter fluid through-hole, 6- electrolyte liquid runners, 7- bipolar plates, 8- positive pole feed liquor runners,
9- positive poles go out liquid runner, and 10- negative poles go out liquid runner, 11- negative pole feed liquor runners, 12- ring-type convexes.
Specific embodiment
The thickness of the flow battery bipolar plates 7 containing speed change runner is 12mm, and length is 80mm, and width is 60mm,
Near positive pole feed liquor runner 8 or the side anode electrolyte runner 3 of negative pole feed liquor runner 11 or electrolyte liquid runner
6 depth are 4mm, near positive pole go out at liquid runner 9 or negative pole the side anode electrolyte runner 3 of liquid runner 10 or
The depth of electrolyte liquid runner 6 is the ring-type of 2mm, anode electrolyte runner 3 or the side of electrolyte liquid runner 6
Boss thickness is 1mm；
Anode electrolyte enters fluid through-hole 1 and flows into by the positive pole in bipolar plates, is flowed into just through positive pole feed liquor runner 8
Pole electrolyte channel 3, after by positive pole go out liquid runner 9 and converge into positive pole and go out fluid through-hole 4 to flow out；
Electrolyte liquid enters fluid through-hole 5 and flows into by the negative pole in bipolar plates, is flowed into through negative pole feed liquor runner 11 negative
Pole electrolyte channel 6, after by negative pole go out liquid runner 10 and converge into negative pole and go out fluid through-hole 2 to flow out.
The all-vanadium flow battery pile assembled with bipolar plates using this flow battery containing speed change runner is in 80mA
cm-2Under the conditions of the pile energy efficiency tested be 84.2%, than using conventional without the bipolar plate structure for deepening runner
The pile efficiency of assembling increased about 4%.
Claims (4)
1. a kind of flow battery bipolar plates containing speed change runner,
For the bipolar plates being applied in the middle of pile, it is respectively equipped with two side surfaces of bipolar plates symmetrical
Runner, and two side surface runners in bipolar plates are formed around as the ring-type convex of liquid flow frame, runner is in
Ring-type convex around region in, side is with anode electrolyte inlet and anode electrolyte liquid outlet
Anode electrolyte runner, in ring-type convex be provided with respectively with anode electrolyte inlet and anode electrolyte
What liquid outlet was connected fluid through-hole and goes out fluid through-hole through entering for bipolar plates plate body；Opposite side is with negative electricity
Solution liquid inlet and electrolyte liquid liquid outlet electrolyte liquid runner, in ring-type convex be provided with respectively with
Electrolyte liquid inlet be connected with electrolyte liquid liquid outlet through bipolar plates plate body enter fluid through-hole and
Go out fluid through-hole；
For first bipolar plates for being applied to pile, a side surface of bipolar plates is provided with runner, and in bipolar
The surface runner of plate is formed around as the ring-type convex of liquid flow frame, runner be in ring-type convex around area
In domain, it is the anode electrolyte runner with anode electrolyte inlet and anode electrolyte liquid outlet, in
Ring-type convex be provided be connected with anode electrolyte inlet and anode electrolyte liquid outlet respectively through double
Entering for pole plate plate body and goes out fluid through-hole at fluid through-hole；
For last bipolar plates for being applied to pile, a side surface of bipolar plates is provided with runner, and in double
The surface runner of pole plate is formed around as the ring-type convex of liquid flow frame, runner be in ring-type convex around
In region, it is the electrolyte liquid runner with electrolyte liquid inlet and electrolyte liquid liquid outlet,
In ring-type convex be provided with respectively with running through that electrolyte liquid inlet and electrolyte liquid liquid outlet are connected
Entering for bipolar plates plate body and goes out fluid through-hole at fluid through-hole；
Anode electrolyte runner be uniform depth change runner, flow channel depth from anode electrolyte inlet extremely
Anode electrolyte liquid outlet direction uniformly reduces, i.e., larger near anode electrolyte inlet side runner depth,
It is smaller near anode electrolyte liquid outlet side runner depth；Electrolyte liquid runner is the stream of uniform depth change
Road, flow channel depth is uniformly reduced from negative pole electrolyte inlet to electrolyte liquid liquid outlet direction, that is, be close to
Electrolyte liquid inlet side runner depth is larger, smaller near electrolyte liquid liquid outlet side runner depth；
The anode electrolyte inlet of the side of bipolar plates two is symmetrical into face with electrolyte liquid liquid outlet；
The anode electrolyte liquid outlet of the side of bipolar plates two is symmetrical into face with electrolyte liquid inlet.
2. bipolar plates according to claim 1, it is characterised in that：
For first bipolar plates for being applied to pile, anode electrolyte runner is the runner of uniform depth change,
Flow channel depth is uniformly reduced from anode electrolyte inlet to anode electrolyte liquid outlet direction, i.e., near positive pole
Electrolyte inlet side runner depth is larger, smaller near anode electrolyte liquid outlet side runner depth；
For last bipolar plates for being applied to pile, a side surface of bipolar plates is provided with runner, and it is band
There is the electrolyte liquid runner of electrolyte liquid inlet and electrolyte liquid liquid outlet；Electrolyte liquid runner
It is the runner of uniform depth change, flow channel depth is from negative pole electrolyte inlet to electrolyte liquid liquid outlet side
It is to uniform reduction, i.e., larger near electrolyte liquid inlet side runner depth, go out liquid near electrolyte liquid
Mouth side runner depth is smaller.
3. bipolar plates according to claim 1, it is characterised in that：Anode electrolyte runner is that depth is equal
The runner of even change, flow channel depth uniformly drops from anode electrolyte inlet to anode electrolyte liquid outlet direction
It is low, i.e., it is larger near anode electrolyte inlet side runner depth, near anode electrolyte liquid outlet side runner
Depth is smaller, and the flow channel depth at anode electrolyte liquid outlet is 0.1-2mm, is entered near anode electrolyte
Liquid mouthful side runner depth 0.5-5mm.
4. bipolar plates according to claim 1, it is characterised in that：Electrolyte liquid runner is that depth is equal
The runner of even change, flow channel depth uniformly drops from negative pole electrolyte inlet to electrolyte liquid liquid outlet direction
It is low, i.e., it is larger near electrolyte liquid inlet side runner depth, near electrolyte liquid liquid outlet side runner
Depth is smaller, and the flow channel depth at electrolyte liquid liquid outlet is 0.1-2mm, is entered near electrolyte liquid
Liquid mouthful side runner depth 0.5-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926413.7A CN106876745B (en) | 2015-12-12 | 2015-12-12 | A kind of flow battery bipolar plates of the runner containing speed change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926413.7A CN106876745B (en) | 2015-12-12 | 2015-12-12 | A kind of flow battery bipolar plates of the runner containing speed change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106876745A true CN106876745A (en) | 2017-06-20 |
| CN106876745B CN106876745B (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510926413.7A Active CN106876745B (en) | 2015-12-12 | 2015-12-12 | A kind of flow battery bipolar plates of the runner containing speed change |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970632A (en) * | 2018-09-29 | 2020-04-07 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for trapezoidal flow battery and application |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867978A (en) * | 2011-07-05 | 2013-01-09 | 中国科学院大连化学物理研究所 | Flow energy storage battery structure |
| CN105514459A (en) * | 2014-09-24 | 2016-04-20 | 中国科学院大连化学物理研究所 | Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof |
| CN104518222B (en) * | 2013-09-29 | 2017-07-07 | 中国科学院大连化学物理研究所 | A kind of flow battery bipolar plates or unipolar plate structure and all-vanadium flow battery |
| CN104716392B (en) * | 2013-12-15 | 2018-09-21 | 中国科学院大连化学物理研究所 | A kind of flow battery structure |
-
2015
- 2015-12-12 CN CN201510926413.7A patent/CN106876745B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867978A (en) * | 2011-07-05 | 2013-01-09 | 中国科学院大连化学物理研究所 | Flow energy storage battery structure |
| CN104518222B (en) * | 2013-09-29 | 2017-07-07 | 中国科学院大连化学物理研究所 | A kind of flow battery bipolar plates or unipolar plate structure and all-vanadium flow battery |
| CN104716392B (en) * | 2013-12-15 | 2018-09-21 | 中国科学院大连化学物理研究所 | A kind of flow battery structure |
| CN105514459A (en) * | 2014-09-24 | 2016-04-20 | 中国科学院大连化学物理研究所 | Mono-trapezoid flow battery, poly-trapezoid flow battery and electric pile thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970632A (en) * | 2018-09-29 | 2020-04-07 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for trapezoidal flow battery and application |
Also Published As
| Publication number | Publication date |
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| CN106876745B (en) | 2019-05-21 |
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