CN103117402B - Porous electrode assembly, liquid-flow half-cell and liquid-flow cell stack - Google Patents
Porous electrode assembly, liquid-flow half-cell and liquid-flow cell stack Download PDFInfo
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- CN103117402B CN103117402B CN201310039261.XA CN201310039261A CN103117402B CN 103117402 B CN103117402 B CN 103117402B CN 201310039261 A CN201310039261 A CN 201310039261A CN 103117402 B CN103117402 B CN 103117402B
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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
Abstract
The invention provides a porous electrode assembly, a liquid-flow half-cell and a liquid-flow cell stack. The porous electrode assembly comprises a plurality of porous electrodes which are superimposed, wherein at least one porous electrode is a channel electrode with a flow channel, and the flow channel runs through the channel electrode in the thickness direction. At least one porous electrode of the porous electrode assembly is a channel electrode with an inner flow channel through which an electrolyte can flow, and the electrolyte flows in the porous electrode with the flow channel under the guide effect of the flow channel, so that the surface area for the electrolyte to permeate the solid part of the porous electrode is increased, the liquid flow resistance of the porous electrode for the flowing of the electrolyte can be reduced, and the liquid flow pressure difference needed by the flowing of the electrolyte can be effectively reduced; and moreover, when the electrolyte flows in the flow channel, the electrolyte uniformly permeates the porous electrodes on two sides of the flow channel, so that the uniformity for the flowing of the liquid flow can be improved, concentration difference polarization caused by the flowing of the electrolyte can be reduced, and the charging-discharging efficiency of a liquid flow cell with the porous electrode assembly can be improved.
Description
Technical field
The present invention relates to flow battery design field, in particular to a kind of porous electrode group, flow half-cell and liquid stream battery stack.
Background technology
Vanadium redox 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 electric energy efficiently.Such battery has long service life, and energy conversion efficiency is high, and fail safe is good, advantages of environment protection, and can be used for wind power generation and the supporting large-scale energy storage system of photovoltaic generation, be one of electrical network peak load shifting, balanced loaded main selection.Therefore, vanadium redox battery becomes the emphasis of Large Copacity energy-storage battery research gradually in recent years.
Vanadium redox battery is respectively with vanadium ion V
2+/ V
3+and V
4+/ V
5+as the both positive and negative polarity oxidation-reduction pair of battery, both positive and negative polarity electrolyte is stored in respectively in two fluid reservoirs, drive active electrolyte to be back to again in fluid reservoir to reacting environment's (battery pile) by acidproof liquor pump and form circulating fluid loop, to realize charge and discharge process.In vanadium redox battery energy-storage system, the quality of stack performance decides the charge-discharge performance of whole system, especially charge-discharge electric power and efficiency.Battery pile stacks compression successively by multi-disc monocell, is in series.Wherein, the composition of monolithic flow battery as shown in Figure 1.1 ' is liquid flow frame, and 2 ' is bipolar plates, and 3 ' is porous electrode, and 4 ' is amberplex, and the flow battery of each assembly composition monolithic, by the stacking composition battery pile 5 ' of N number of flow battery.
The flowing of existing liquid stream battery stack electrolyte inside is generally by the infiltration mass transfer of porous electrode, and the type of flow of this electrolyte causes liquid drift angle in battery pile very large on the one hand, pump exorbitant expenditure, thus flow battery system efficiency is reduced; On the other hand, the flowing of battery pile electrolyte inside is uneven, concentration polarization is comparatively large, causes pile internal loss, thus the voltage efficiency of battery is reduced.
Summary of the invention
The present invention aims to provide a kind of porous electrode group, flow half-cell and liquid stream battery stack, improves the homogeneity of porous electrode electrolyte inside flowing.
To achieve these goals, according to an aspect of the present invention, provide a kind of porous electrode group, porous electrode group comprises stacked multiple porous electrodes, wherein at least one porous electrode is the runner electrode with runner, and runner is through at the thickness direction of runner electrode.
Further, above-mentioned runner is the transverse flow channels extended transversely of one or more closed at both ends or the longitudinal runner extended longitudinally.
Further, above-mentioned runner is one, and runner is arranged on the center line of porous electrode.
Further, above-mentioned runner is multiple, and the arrangement mode of runner is: A, each runner be arranged in parallel, and the two ends of each runner are identical to the distance at the edge of the porous electrode vertical with runner bearing of trend; Or B, each runner be arranged in parallel, and adjacent channels is staggered along runner bearing of trend; Or C, runner are divided into the multiple runner groups be arranged in parallel, and runner group comprises multiple runner, the bearing of trend of each runner group is consistent with the bearing of trend of the runner in this runner group, and in adjacent channels group, runner is staggered along runner bearing of trend; Or D, runner are divided into the multiple runner groups be arranged in parallel, runner group comprises multiple runner, the bearing of trend of each runner group is vertical with the bearing of trend of the runner in this runner group, and staggered along runner bearing of trend between each runner in each runner group.
Further, above-mentioned runner comprise transversely or longitudinal extension one or more first flow and along one or more second runners extended perpendicular to the bearing of trend of first flow, first flow is not communicated with the second runner.
Further, the arrangement mode of above-mentioned runner is: E, porous electrode are provided with multiple first flow, and the plurality of first flow is divided into multiple first flow group, at least one the second runners are set between adjacent two first flow groups, each first flow group comprises the multiple first flows be arranged in parallel, and adjacent first flow is staggered; Or F, porous electrode are provided with one or more T-shaped runner group, T-shaped runner group comprises a first flow and second runner in the middle part of this first flow, the second runner in T-shaped runner group is not communicated with first flow, when T-shaped runner group is multiple, in adjacent two T-shaped runner groups, two the second runners are parallel to each other, and two first flows are positioned at the difference end of corresponding second runner, and each adjacent T-shaped runner group is not communicated with each other; Or G, porous electrode are provided with one or more I font runner group, I font runner group comprises parallel two first flows and two ends second runner respectively in the middle part of two first flows be oppositely arranged, second runner is not communicated with first flow, when I font runner group is multiple, and each I font runner group is not communicated with each other.
Further, above-mentioned runner comprise transversely or longitudinal extension first flow and along the second runner extended perpendicular to the bearing of trend of first flow, first flow is connected with the second runner.
Further, the arrangement mode of above-mentioned runner comprises: H, porous electrode are provided with one or more zigzag runner group, zigzag runner group comprises two first flows and second runner, two first flows are separately positioned on the both sides of the second runner, and different from the second runner respectively end of two first flows is connected, when zigzag runner group is multiple, and each zigzag runner group is not communicated with each other.
Further, above-mentioned runner is the runner of multiple one end open.
Further, the spacing of adjacent above-mentioned runner is identical.
Further, the opening direction of adjacent above-mentioned runner is contrary or identical.
Further, above-mentioned porous electrode group comprises 2n porous electrode, and n is positive integer, wherein, n=1, a porous electrode is runner electrode; Or n=1, and each porous electrode is runner electrode, the runner of adjacent channels electrode is staggered, or n > 1, and n porous electrode spaced apart is runner electrode, the runner of adjacent runner electrode is staggered, and the runner of spaced porous electrode is just to arrangement; Or n > 1, and each porous electrode is runner electrode, the runner of adjacent runner electrode is staggered, and the runner of spaced runner electrode is just to arrangement.
Further, above-mentioned porous electrode group comprises 2n+1 porous electrode, and n is positive integer, and wherein, the porous electrode being positioned at the center of porous electrode group is runner electrode; Or n ± 1 porous electrode spaced apart is runner electrode, and the runner of adjacent runner electrode is staggered, and the runner of spaced runner electrode is just to arrangement; Or 2n+1 porous electrode is runner electrode, and the runner of adjacent runner electrode is staggered, mutually away from the runner of runner electrode just to arrangement.
According to a further aspect in the invention, provide a kind of flow half-cell, flow half-cell comprises: liquid flow frame, and the electrode container cavity having frame and formed by frame, frame is provided with electrolyte inlet and electrolyte outlet; Porous electrode group, to be embedded in the electrode container cavity of liquid flow frame and to be connected with electrolyte outlet with electrolyte inlet, porous electrode group for claim to any one of porous electrode group; Bipolar plates, is arranged on the side of liquid flow frame and parallel with porous electrode group.
Further, above-mentioned liquid flow frame comprises the first relative frame and the second frame, and electrolyte inlet is arranged on the first frame, and electrolyte outlet is arranged on the second frame, porous electrode group and have gap between the first frame and the second frame.
Further, the runner of above-mentioned porous electrode group is the runner of multiple one end open and vertical with the second frame with the first frame, and gap is communicated with electrolyte inlet and runner and electrolyte outlet and runner.
Further, above-mentioned bipolar plates is provided with the electrolyte directed fluid inlet corresponding with electrolyte inlet and electrolyte outlet and electrolyte diversion outlet.
According to a further aspect in the invention, provide a kind of liquid stream battery stack, the amberplex comprising one or more positive pole half-cell, one or more negative pole half-cell and be arranged between positive pole half-cell and negative pole half-cell, it is characterized in that, positive pole half-cell and negative pole half-cell are above-mentioned flow half-cell, and the bipolar plates of flow half-cell is arranged away from amberplex.
Apply technical scheme of the present invention, at least one porous electrode of porous electrode group is the runner electrode that inside is provided with the runner of electrolysis liquid circulation, electrolyte under the guide functions of runner in the porous electrode with runner flowing add the surface area that electrolyte permeates to the entity part of porous electrode, decrease the liquid flowing resistance that porous electrode causes electrolyte flow, significantly reduce the liquid drift angle needed for electrolyte flow; And electrolyte when flowing in runner, uniformly penetrating in the porous electrode of runner both sides, improves the homogeneity of fluid flow, decreases the concentration polarization because electrolyte flow inequality causes, improves the efficiency for charge-discharge with its flow battery.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of flow battery of the prior art;
Fig. 2 shows the structural representation in the porous electrode group according to a kind of preferred embodiment of the present invention with the porous electrode of runner;
Fig. 3 shows the structural representation in the porous electrode group according to another kind of preferred embodiment of the present invention with the porous electrode of runner;
Fig. 4 a shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 4 b shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 5 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 6 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 7 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 8 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Fig. 9 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Figure 10 shows the structural representation in the porous electrode group according to another preferred embodiment of the present invention with the porous electrode of runner;
Figure 11 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 12 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 11, and wherein arrow points is the flow direction of electrolyte;
Figure 13 shows the structural representation of the flow battery half-cell with the porous electrode group shown in Figure 11;
Figure 14 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 15 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 14, and wherein arrow points is the flow direction of electrolyte;
Figure 16 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 17 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 16, and wherein arrow points is the flow direction of electrolyte;
Figure 18 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 19 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 18, and wherein arrow points is the flow direction of electrolyte;
Figure 20 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 21 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 20, and wherein arrow points is the flow direction of electrolyte;
Figure 22 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 23 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 22, and wherein arrow points is the flow direction of electrolyte;
Figure 24 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention;
Figure 25 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 24, and wherein arrow points is the flow direction of electrolyte;
Figure 26 shows the structural representation of the porous electrode group according to another preferred embodiment of the present invention; And
Figure 27 shows the flow schematic diagram of the porous electrode group electrolyte inside shown in Figure 26, and wherein arrow points is the flow direction of electrolyte.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Fig. 2 to Figure 27, in the typical execution mode of one of the present invention, provide a kind of porous electrode group, porous electrode group comprises stacked multiple porous electrodes 30, wherein at least one porous electrode 30 is for having the runner electrode of runner 31, and runner 31 is through at the thickness direction of runner electrode.
There is the porous electrode group of said structure, wherein at least one porous electrode 30 is the inner runner electrode being provided with the runner 31 of electrolysis liquid circulation, electrolyte under the guide functions of runner 31 in the porous electrode 30 with runner 31 flowing add the surface area that electrolyte permeates to the entity part of porous electrode 30, decrease the liquid flowing resistance that porous electrode 30 pairs of electrolyte flow cause, significantly reduce the liquid drift angle needed for electrolyte flow; And electrolyte when flowing in runner 31, uniformly penetrating in the porous electrode 30 of runner 31 both sides, improves the homogeneity of fluid flow, decreases the concentration polarization because electrolyte flow inequality causes, improves the efficiency for charge-discharge with its flow battery.
The thickness of the porous electrode 30 in porous electrode group of the present invention can be the same or different, the porous electrode group of different-thickness ratio has different impacts for the transmission direction of electrolyte and electrolyte in the mass-transfer efficiency of regional area, when the thickness of the porous electrode 30 with runner is larger, when the thickness of remaining porous electrode 30 is less, the mass-transfer efficiency of electrolyte can make moderate progress, and those skilled in the art can carry out preferably the thickness of porous electrode 30 according to the demand of mass-transfer efficiency.
As shown in Fig. 2 to 6, the runner 31 of above-mentioned porous electrode 30 is the transverse flow channels extended transversely of one or more closed at both ends or the longitudinal runner extended longitudinally.Runner 31 extends transversely or extends longitudinally, the uniform liquid stream pressure that runner 31 with the contact-making surface of porous electrode 30 are formed, thus be delivered to the position that runner 31 is not set in porous electrode 30 and also can form relatively uniform liquid stream pressure, make the liquid stream of porous electrode 30 inside realize Uniform Flow.
As shown in Figure 2, in a kind of preferred embodiment of the present invention, the runner 31 of above-mentioned porous electrode group is one, and runner 31 is arranged on the center line of porous electrode 30.When the center line at porous electrode 30 being arranged a runner 31, this runner 31 can be arranged on cross central line, also can arrange on the longitudinal, the electrolyte being distributed in porous electrode 30 inside of runner 31 both sides can realize Uniform Flow under the homogeneous pressure of the electrolyte of runner 31 inside.
As shown in Figures 3 to 6, in a kind of preferred embodiment of the present invention, the runner 31 of above-mentioned porous electrode group is multiple, and the arrangement mode of runner 31 is: A, each runner 31 be arranged in parallel, and the two ends of each runner 31 are identical to the distance at the edge of the porous electrode 30 vertical with runner 31 bearing of trend; Or B, each runner 31 be arranged in parallel, and adjacent channels 31 is staggered along runner 31 bearing of trend; Or C, runner 31 are divided into the multiple runner groups be arranged in parallel, runner group comprises multiple runner 31, the bearing of trend of each runner group is consistent with the bearing of trend of the runner 31 in this runner group, and in adjacent channels group, runner 31 is staggered along runner 31 bearing of trend; Or D, runner 31 are divided into the multiple runner groups be arranged in parallel, runner group comprises multiple runner 31, the bearing of trend of each runner group is vertical with the bearing of trend of the runner 31 in this runner group, and each runner 31 in each runner group is staggered along runner 31 bearing of trend.
When the arrangement mode of the runner 31 in porous electrode 30 is A, as shown in Figure 5, the spacing of two adjacent runners 31 can equal also can be different, when adjacent runner 31 spacing along electrolyte longitudinal flow direction reduce time, the volume in the porous electrode region between runner 31 also reduces along same direction, therefore more effectively avoid the flows decrease of the prolongation electrolyte of the glide path along with electrolyte, cause the problem that liquid pressure diminishes, electrolyte flow rate reduces further that porous electrode region is produced.Adopt arrangement mode A, electrolyte in runner 31 produces more uniform pressure to its porous electrode region that will flow through, thus make electrolyte homogeneous flowing in porous electrode 30, runner 31 not only can be arranged in the mode of the horizontal expansion shown in Fig. 5, also can arrange in the mode of longitudinal extension, and the spacing of adjacent runner 31 can equal also can be unequal, the spacing of preferably adjacent runner 31 reduces along the direction of electrolyte lateral flow.
When the arrangement mode of the runner 31 in porous electrode 30 is B, as shown in fig. 4 a, the runner 31 of horizontal expansion carries out staggered with arrangement mode B, the spacing of adjacent runner 31 can equal also can be unequal, the spacing of preferably adjacent runner 31 reduces along the direction of electrolyte longitudinal flow, and as shown in Figure 4 b, the runner 31 of longitudinal extension carries out staggered with arrangement mode B, the spacing of adjacent runner 31 can equal also can be unequal, the spacing of preferably adjacent runner 31 reduces along the direction of electrolyte lateral flow, can make to produce certain pressure to electrolyte flow between adjacent runner 31, under the comprehensive function of adjacent runner 31, make electrolyte homogeneous flowing in porous electrode 30.
When the arrangement mode of the runner 31 in porous electrode 30 is C, as shown in Figure 5, combine the advantage of arrangement mode A and B, therefore, runner 31 arranges with above-mentioned arrangement mode C the liquid drift angle reduced needed for electrolyte flow and realizes homogeneous flowing in porous electrode 30 inside.
When the runner 31 in porous electrode 30 is D, as shown in Figure 6, when the runner 31 of longitudinal extension is arranged with arrangement mode D, the technique effect with arrangement mode as shown in Figure 5 also can be realized.
The runner 31 of above-mentioned porous electrode group comprise transversely or longitudinal extension one or more first flow and along one or more second runners extended perpendicular to the bearing of trend of first flow, first flow is not communicated with the second runner.The runner 31 of horizontal expansion and the runner 31 of longitudinal extension are comprehensively arranged, both achieved the transverse direction of electrolyte in runner 31 and longitudinally circulated, and, the liquid stream pressure that electrolyte is produced in porous electrode 30 inside is more even, better achieves the effect of electrolyte in the inner homogeneous flowing of porous electrode 30.
As shown in Figure 7 to 9, in another preferred embodiment of the present invention, the arrangement mode of above-mentioned runner 31 is: E, porous electrode 30 are provided with multiple first flow, and the plurality of first flow is divided into multiple first flow group, at least one the second runners are set between adjacent two first flow groups, each first flow group comprises the multiple first flows be arranged in parallel, and adjacent first flow is staggered; Or F, porous electrode 30 are provided with one or more T-shaped runner group, T-shaped runner group comprises a first flow and second runner in the middle part of this first flow, the second runner in T-shaped runner group is not communicated with first flow, when T-shaped runner group is multiple, in adjacent two T-shaped runner groups, two the second runners are parallel to each other, and two first flows are positioned at the difference end of corresponding second runner, and each adjacent T-shaped runner group is not communicated with each other; Or G, porous electrode 30 are provided with one or more I font runner group, I font runner group comprises parallel two first flows and two ends second runner respectively in the middle part of two first flows be oppositely arranged, second runner is not communicated with first flow, when I font runner group is multiple, and each I font runner group is not communicated with each other.
When the arrangement mode of the runner 31 in porous electrode group of the present invention is E, as shown in Figure 7, porous electrode 30 is divided into uniform several porous electrode region by the second runner of horizontal expansion, the parallel distribution of first flow of the longitudinal extension that each porous electrode intra-zone is arranged, and interlaced arrangement, the zonule of electrolysis liquid homogeneous flowing is better formed like this in each porous electrode region, these zonules combine and just obtain the porous electrode 30 that an inside has the homogeneous distribution of electrolyte, when the second runner longitudinal extension made in Fig. 7 and first flow horizontal expansion time, also above-mentioned electrolyte can be realized in the inner homogeneous distribution of porous electrode 30.
When the arrangement mode of the runner 31 in porous electrode group of the present invention is F, as shown in Figure 8, just T-shaped and inverted T-shape cross arrangement, in addition, T-shapedly also can all also can all to arrange with inverted T-shape with just T-shaped arrangement, and the spacing distance between each T-shaped first flow and the second runner can be the same or different.T-shaped liquid stream pressure is around homogeneous, and T-shaped number is more, and the runner of porous electrode 30 inside is more, and the resistance that electrolyte flow is subject in porous electrode 30 is less, electrolyte more easily realize homogeneous effect.
When the arrangement mode of the runner 31 in porous electrode group of the present invention is G, as shown in Figure 9, I font distributes by shown in Fig. 9, liquid stream pressure around I font is homogeneous, and the number of I font is more, the runner of porous electrode 30 inside is more, the resistance that electrolyte flow is subject in porous electrode 30 is less, electrolyte more easily realize homogeneous effect.
The runner 31 of above-mentioned porous electrode group comprise transversely or longitudinal extension first flow and along the second runner extended perpendicular to the bearing of trend of first flow, first flow is connected with the second runner.The runner 31 of horizontal expansion and the runner 31 of longitudinal extension are comprehensively arranged, both achieved the transverse direction of electrolyte in runner 31 and longitudinally circulated, and first flow is connected with the second runner and enhances the mobility of electrolyte in runner 31, the liquid stream pressure that electrolyte is produced in porous electrode 30 inside is more even, better achieves the effect of electrolyte in the inner homogeneous flowing of porous electrode 30.
In another preferred embodiment of the present invention, as shown in Figure 10, the arrangement mode of the runner 31 of above-mentioned porous electrode group comprises: H, porous electrode 30 are provided with one or more zigzag runner group, zigzag runner group comprises two first flows and second runner, two first flows are separately positioned on the both sides of the second runner, and different from the second runner respectively end of two first flows is connected, when zigzag runner group is multiple, and each zigzag runner group is not communicated with each other.According to the runner 31 of the zigzag arranged shown in Figure 10 in porous electrode 30, when electrolyte flows in the runner 31 of this zigzag, the pressure raw homogeneous to the liquid miscarriage around this zigzag, and, the number of zigzag is more, the runner more than 31 of porous electrode 30 inside, the resistance that electrolyte flow is subject in porous electrode 30 is less, the effect more easily realizing homogeneous flowing of electrolyte.
As shown in Figure 11 to 27, the runner 31 of porous electrode group of the present invention is the runner of multiple one end open.Runner 31 is set to the runner with one end open, is then conducive to electrolyte and successfully enters in runner 31, and then improve the flowing of electrolyte in porous electrode group, more easily realize the homogeneous flowing of electrolyte.
More uniformly penetrate in the entity of porous electrode 30 in order to improve electrolyte further by runner 31, the spacing of preferred adjacent channels 31 is identical.
In order to make electrolyte flow direction in runner 31 of the present invention controlled, the opening direction of preferred adjacent channels 31 is contrary or identical.
As shown in Figure 11 to Figure 21, it is positive integer that above-mentioned porous electrode group comprises 2n porous electrode 30, n, wherein, n=1, a porous electrode 30 is runner electrode; Or n=1, and each porous electrode 30 is runner electrode, the runner 31 of adjacent channels electrode is staggered, or n > 1, and n porous electrode 30 spaced apart is runner electrode, the runner 31 of adjacent runner electrode is staggered, and the runner 31 of spaced runner electrode is just to arrangement; Or n > 1, and each porous electrode 30 is runner electrode, the runner 31 of adjacent runner electrode is staggered, and the runner 31 of spaced runner electrode is just to arrangement.
Electrolyte is permeated to the other parts of the porous electrode 30 of porous electrode group by the runner 31 near electrolyte entrance, and flow out porous electrode group by the runner 31 near electrolyte outlet place, decrease the resistance that electrolyte flows into, flows out and permeate in porous electrode 30, optimize the homogeneity of the flowing of electrolyte in porous electrode group from three dimensions.For n=1, as shown in Figure 11 to Figure 15, a runner electrode is only had in two porous electrodes 30 of porous electrode group, electrolyte enters runner electrode by runner 31, then the entity part to runner electrode is permeated with another porous electrode 30 and reacts in porous electrode 30, then flows to the runner 31 of runner electrode and flows out runner electrode.As shown in Figure 16 to Figure 21, when porous electrode group have two be the runner electrode with runner time, electrolyte can interpenetrate flowing as shown in figure 17 between porous electrode, also can be shortened the seepage distance of electrolyte in porous electrode 30 by staggered runner 31, thus optimize the homogeneity that electrolyte flows in porous electrode 30.
As shown in Figure 22 to Figure 27, it is positive integer that above-mentioned porous electrode group comprises 2n+1 porous electrode 30, n, and wherein, the porous electrode 30 being positioned at the center of porous electrode group is runner electrode; Or n ± 1 porous electrode spaced apart 30 is runner electrode, and the runner 31 of adjacent runner electrode is staggered, and the runner 31 of spaced runner electrode is just to arrangement; Or 2n+1 porous electrode 30 is runner electrode, and the runner 31 of adjacent runner electrode is staggered, mutually away from the runner 31 of runner electrode just to arrangement.
There is the porous electrode group of said structure, three-dimensional designs different runner 31 structures, and by the guide functions of runner 31, electrolyte is permeated on the three-dimensional of porous electrode group by the inside of porous electrode 30, improve the homogeneity that electrolyte flows in porous electrode group.
As shown in figure 13, in the typical execution mode of another kind of the present invention, provide a kind of flow half-cell, flow half-cell comprises liquid flow frame 1, porous electrode group 3 and bipolar plates 2, the electrode container cavity that liquid flow frame 1 has frame 11 and formed by frame 11, frame 11 is provided with electrolyte inlet 12 and electrolyte outlet 13; Porous electrode group 3 to be embedded in the electrode container cavity of liquid flow frame 1 and to be connected with electrolyte outlet 13 with electrolyte inlet 12, and porous electrode group 3 is above-mentioned porous electrode group; Bipolar plates 2 is arranged on the side of liquid flow frame 1 and parallel with porous electrode group 3.
There is the flow half-cell of said structure, the electrolyte inlet 12 of porous electrode group 3 and liquid flow frame 1 is connected with electrolyte outlet 13 and electrolyte can be transported in porous electrode group 2 rapidly, and flowed in the stacked porous electrode 30 of porous electrode group 3 by the runner 31 of porous electrode group 3, infiltration, existence due to runner 31 resistance decreased when electrolyte flows in porous electrode group 3 improves the homogeneity of liquid stream, add the mass-transfer efficiency of electrolyte in porous electrode group, reduce concentration polarization and the pressure drop of liquid stream, improve the efficiency for charge-discharge of flow half-cell.
In a kind of preferred embodiment of the present invention, the liquid flow frame 1 of above-mentioned flow half-cell comprises the first relative frame and the second frame, electrolyte inlet 12 is arranged on the first frame, electrolyte outlet 13 is arranged on the second frame, porous electrode group 3 and have gap between the first frame and the second frame.
Be provided with the first frame of electrolyte inlet 12 and be provided with gap between the second frame of electrolyte outlet 13 and porous electrode group 3, utilize this gap the electrolyte flowed into by electrolyte inlet 12 is transported to equably with the runner of porous electrode 30 in or penetrate in porous electrode 30, then mutually flow between the porous electrode 30 of porous electrode group 3, realize high efficiency discharge and recharge reaction.
The present invention is in order to improve the mobility of the electrolyte between porous electrode group 3 and liquid flow frame 1 further, the runner 31 of preferred porous electrode group 3 is the runner of multiple one end open and vertical with the second frame with the first frame, and gap is communicated with electrolyte inlet 12 and runner 31 and electrolyte outlet 13 and runner 31.The electrolyte flowed into by electrolyte inlet 12 enters by utilization and the vertically disposed gap of runner 31 simultaneously to be had in the runner 31 of opening, improve the homogeneity that electrolyte flows in porous electrode 30, and utilize gap in time the electrolyte after reaction to be transferred out porous electrode 30, improve the efficiency for charge-discharge of flow half-cell.
In another preferred embodiment of the present invention, the bipolar plates 2 of above-mentioned flow half-cell is provided with the electrolyte directed fluid inlet corresponding with electrolyte inlet 12 and electrolyte outlet 13 and electrolyte diversion outlet.By being arranged at electrolyte inlet 12 and the corresponding electrolyte directed fluid inlet of electrolyte outlet 13 and electrolyte diversion outlet in bipolar plates 2, make electrolyte successively through electrolyte directed fluid inlet, electrolyte inlet 12, porous electrode group 3, electrolyte outlet 13 and electrolyte diversion outlet, make electrolyte flow into flow half-cell short as much as possible with the path of flowing out flow half-cell, and improve the integrated level of flow half-cell and the compactness of structure.
The liquid flow frame 1 of flow half-cell of the present invention can arrange anode electrolyte import simultaneously, anode electrolyte exports, the import of electrolyte liquid and the outlet of electrolyte liquid, bipolar plates 2 can arrange the anode electrolyte directed fluid inlet corresponding with anode electrolyte import simultaneously, corresponding anode electrolyte diversion outlet is exported with anode electrolyte, the electrolyte liquid directed fluid inlet corresponding with the import of electrolyte liquid and export corresponding electrolyte liquid diversion outlet with electrolyte liquid, and the anode electrolyte in flowing and electrolyte liquid are kept apart by the mode coordinated with seal groove by present conventional sealing ring.
In the typical execution mode of another kind of the present invention, provide a kind of liquid stream battery stack, the amberplex 4 comprising one or more positive pole half-cell, one or more negative pole half-cell and be arranged between positive pole half-cell and negative pole half-cell, positive pole half-cell and negative pole half-cell are above-mentioned flow half-cell, and the bipolar plates 2 of flow half-cell is arranged away from amberplex 4.
Above-mentioned liquid stream battery stack has flow half-cell of the present invention, and therefore, this liquid stream battery stack also has higher efficiency for charge-discharge.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a porous electrode group, it is characterized in that, described porous electrode group comprises stacked multiple porous electrodes (30), wherein porous electrode described at least one (30) is for having the runner electrode of runner (31), described runner (31) is through at the thickness direction of described runner electrode
Described porous electrode group comprises 2n porous electrode (30), and n is positive integer, wherein,
N=1, a described porous electrode (30) is described runner electrode; Or
N=1, and each described porous electrode (30) is described runner electrode, the described runner (31) of adjacent described runner electrode is staggered, or
N > 1, and n described porous electrode (30) spaced apart is described runner electrode, the described runner (31) of adjacent described runner electrode is staggered, and the described runner (31) of spaced described porous electrode (30) is just to arrangement; Or
N > 1, and each described porous electrode (30) is described runner electrode, the described runner (31) of adjacent described runner electrode is staggered, and the described runner (31) of spaced described runner electrode is just to arrangement; Or
Described porous electrode group comprises 2n+1 porous electrode (30), and n is positive integer, wherein,
The porous electrode (30) being positioned at the center of described porous electrode group is described runner electrode; Or
A n ± 1 described porous electrode (30) spaced apart is described runner electrode, the described runner (31) of adjacent described runner electrode is staggered, and the described runner (31) of spaced described runner electrode is just to arrangement; Or
Described 2n+1 porous electrode (30) is described runner electrode, and the described runner (31) of adjacent described runner electrode is staggered, mutually away from the described runner (31) of described runner electrode just to arrangement.
2. porous electrode group according to claim 1, is characterized in that, the transverse flow channels extended transversely that described runner (31) is one or more closed at both ends or the longitudinal runner extended longitudinally.
3. porous electrode group according to claim 2, is characterized in that, described runner (31) is one, and described runner (31) is arranged on the center line of described porous electrode (30).
4. porous electrode group according to claim 2, is characterized in that, described runner (31) is for multiple, and the arrangement mode of described runner (31) is:
A, each described runner (31) be arranged in parallel, and the two ends of each described runner (31) are identical to the distance at the edge of the described porous electrode (30) vertical with described runner (31) bearing of trend; Or
B, each described runner (31) be arranged in parallel, and adjacent described runner (31) is staggered along described runner (31) bearing of trend; Or
C, described runner (31) are divided into the multiple runner groups be arranged in parallel, described runner group comprises multiple described runner (31), the bearing of trend of each described runner group is consistent with the bearing of trend of the described runner (31) in this runner group, and described in adjacent described runner group, runner (31) is staggered along described runner (31) bearing of trend; Or
D, described runner (31) are divided into the multiple runner groups be arranged in parallel, described runner group comprises multiple described runner (31), the bearing of trend of each described runner group is vertical with the bearing of trend of the described runner (31) in this runner group, and staggered along described runner (31) bearing of trend between each described runner (31) in each described runner group.
5. porous electrode group according to claim 1, it is characterized in that, described runner (31) comprise transversely or longitudinal extension one or more first flow and along one or more second runners extended perpendicular to the bearing of trend of described first flow, described first flow is not communicated with described second runner.
6. porous electrode group according to claim 5, is characterized in that, the arrangement mode of described runner (31) is:
E, described porous electrode (30) are provided with multiple first flow, and the plurality of first flow is divided into multiple first flow group, between adjacent two first flow groups, the second runner described at least one is set, each first flow group comprises the multiple first flows be arranged in parallel, and adjacent described first flow is staggered; Or
F, described porous electrode (30) are provided with one or more T-shaped runner group, described T-shaped runner group comprises a described first flow and described second runner in the middle part of this first flow, described second runner in described T-shaped runner group is not communicated with described first flow, when described T-shaped runner group is multiple, in adjacent two described T-shaped runner groups, two the second runners are parallel to each other, two first flows are positioned at the difference end of corresponding second runner, and each adjacent described T-shaped runner group is not communicated with each other; Or
G, described porous electrode (30) are provided with one or more I font runner group, described I font runner group comprises parallel two first flows and two ends described second runner respectively in the middle part of described two first flows be oppositely arranged, described second runner is not communicated with described first flow, when described I font runner group is multiple, and each described I font runner group is not communicated with each other.
7. porous electrode group according to claim 1, it is characterized in that, described runner (31) comprise transversely or longitudinal extension first flow and along the second runner extended perpendicular to the bearing of trend of described first flow, described first flow is connected with described second runner.
8. porous electrode group according to claim 7, is characterized in that, the arrangement mode of described runner (31) comprising:
H, described porous electrode (30) are provided with one or more zigzag runner group, described zigzag runner group comprises two first flows and second runner, two described first flows are separately positioned on the both sides of the second runner, and different from the described second runner respectively end of two described first flows is connected, when described zigzag runner group is multiple, and each described zigzag runner group is not communicated with each other.
9. porous electrode group according to claim 1, is characterized in that, the runner that described runner (31) is multiple one end open.
10. porous electrode group according to claim 9, is characterized in that, the spacing of adjacent described runner (31) is identical.
11. porous electrode groups according to claim 10, is characterized in that, the opening direction of adjacent described runner (31) is contrary or identical.
12. 1 kinds of flow half-cell, is characterized in that, described flow half-cell comprises:
Liquid flow frame (1), the electrode container cavity having frame (11) and formed by described frame (11), described frame (11) is provided with electrolyte inlet (12) and electrolyte outlet (13);
Porous electrode group (3), to be embedded in the described electrode container cavity of described liquid flow frame (1) and to be connected with electrolyte outlet (13) with described electrolyte inlet (12), the porous electrode group of described porous electrode group (3) according to any one of claim 1 to 11;
Bipolar plates (2), is arranged on the side of described liquid flow frame (1) and parallel with described porous electrode group (3).
13. flow half-cell according to claim 12, it is characterized in that, described liquid flow frame (1) comprises the first relative frame and the second frame, described electrolyte inlet (12) is arranged on described first frame, described electrolyte outlet (13) is arranged on described second frame, described porous electrode group (3) and have gap between described first frame and described second frame.
14. flow half-cell according to claim 13, it is characterized in that, the runner that the runner (31) of described porous electrode group (3) is multiple one end open and vertical with described second frame with described first frame, described gap is communicated with described electrolyte inlet (12) and described runner (31) and described electrolyte outlet (13) and described runner (31).
15. according to claim 12 to the flow half-cell according to any one of 14, it is characterized in that, described bipolar plates (2) is provided with the electrolyte directed fluid inlet corresponding with described electrolyte inlet (12) and electrolyte outlet (13) and electrolyte diversion outlet.
16. 1 kinds of liquid stream battery stacks, the amberplex (1) comprising one or more positive pole half-cell, one or more negative pole half-cell and be arranged between described positive pole half-cell and described negative pole half-cell, it is characterized in that, described positive pole half-cell and described negative pole half-cell are the flow half-cell described in any one of claim 12 to 15, and the bipolar plates of described flow half-cell (2) is arranged away from described amberplex (1).
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| JP6108008B1 (en) * | 2016-05-30 | 2017-04-05 | 住友電気工業株式会社 | Bipolar plate, cell frame and cell stack, and redox flow battery |
| US10950867B2 (en) * | 2016-12-13 | 2021-03-16 | Toray Industries, Inc. | Electrode, redox flow battery, and method for producing electrode |
| CN116742030B (en) * | 2023-08-14 | 2023-12-05 | 北京普能世纪科技有限公司 | Electrode for flow battery and flow battery |
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| CN102723501A (en) * | 2012-06-29 | 2012-10-10 | 中国东方电气集团有限公司 | Porous electrode, liquid flow battery with same, battery stack and battery system |
| CN102751525A (en) * | 2012-06-29 | 2012-10-24 | 中国东方电气集团有限公司 | Flow battery, and flow battery stack and flow battery system containing same |
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| CN102751525A (en) * | 2012-06-29 | 2012-10-24 | 中国东方电气集团有限公司 | Flow battery, and flow battery stack and flow battery system containing same |
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