CN102751525B - Flow battery and containing its liquid stream battery stack and flow battery system - Google Patents
Flow battery and containing its liquid stream battery stack and flow battery system Download PDFInfo
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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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- 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 discloses a kind of flow battery and containing its liquid stream battery stack and flow battery system.This flow battery comprises liquid flow frame, collector plate, porous electrode and barrier film, porous electrode is embedded in the cavity of liquid flow frame, collector plate fits in the side of porous electrode, barrier film fits in the side of porous electrode away from collector plate, there is in two frames that liquid flow frame is opposing parallel inlet and liquid outlet that electrolysis liquid flows into or flows out porous electrode, there is between inlet and porous electrode the first transverse flow channels that electrolysis liquid laterally circulates, there is between liquid outlet and porous electrode the second transverse flow channels that electrolysis liquid laterally circulates, porous electrode comprises at least two the porous electrode blocks be fitted in collector plate, the first horizontal flow-guiding channel is formed between adjacent porous electrode block, first horizontal flow-guiding channel is through on the thickness direction of porous electrode.First horizontal conducting runner of the present invention decreases the resistance of electrolyte flow, improves the energy efficiency of liquid stream homogeneity and battery.
Description
Technical field
The present invention relates to flow battery field, particularly relate to a kind of flow battery and containing its liquid stream battery stack and flow battery system.
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 collector plate, and 3 is porous electrode, and 4 is barrier film, and the flow battery of each assembly composition monolithic, by the stacking composition battery pile 6 of N number of flow battery.As shown in Figure 2, by battery pile 6, positive pole fluid reservoir 71, negative pole fluid reservoir 72, positive pole circulation fluid path liquor pump 81, negative pole circulation fluid path liquor pump 82, and positive pole liquid line 91,101 and negative pole liquid line 92,102 form flow battery system.
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 invention provides a kind of flow battery and containing its liquid stream battery stack and flow battery system, large for solving liquid drift angle in liquid stream battery stack of the prior art, the problem that electrolyte flow is uneven.
According to an aspect of the present invention, provide a kind of flow battery, comprise liquid flow frame, collector plate, porous electrode and barrier film, porous electrode is embedded in the cavity of liquid flow frame, collector plate fits in the side of porous electrode, barrier film fits in the side of porous electrode away from collector plate, there is in two frames that liquid flow frame is opposing parallel inlet and liquid outlet that electrolysis liquid flows into or flows out porous electrode, there is between inlet and porous electrode the first transverse flow channels that electrolysis liquid laterally circulates, there is between liquid outlet and porous electrode the second transverse flow channels that electrolysis liquid laterally circulates, porous electrode comprises at least two the porous electrode blocks be fitted in collector plate, the first horizontal flow-guiding channel is formed between adjacent porous electrode block, first horizontal flow-guiding channel is through on the thickness direction of porous electrode.
Further, above-mentioned first horizontal flow-guiding channel is parallel with the second transverse flow channels with the first transverse flow channels, and the length of the first horizontal flow-guiding channel is identical with the transverse width of porous electrode.
Further, be provided with the flow-guiding channel of electrolysis liquid flowing in above-mentioned porous electrode block, the direction of running through of flow-guiding channel extends along the thickness direction of porous electrode block.
Further, above-mentioned flow-guiding channel is the horizontal flow-guiding channel extended transversely or the longitudinal flow-guiding channel extended longitudinally.
Further, above-mentioned flow-guiding channel is one or more.
Further, above-mentioned flow-guiding channel is one, and flow-guiding channel is arranged on the center line of porous electrode block.
Further, above-mentioned flow-guiding channel is multiple, and the arrangement mode of flow-guiding channel is: A, each flow-guiding channel be arranged in parallel, and the two ends of each flow-guiding channel are identical to the distance at the edge of the porous electrode block vertical with flow-guiding channel bearing of trend; Or B, each flow-guiding channel be arranged in parallel, and adjacent guide passage is staggered; Or C, flow-guiding channel are divided into the multiple flow-guiding channel groups be arranged in parallel, and flow-guiding channel group comprises multiple flow-guiding channel, and in adjacent guide passage group, flow-guiding channel is staggered; Or D, flow-guiding channel are divided into the multiple flow-guiding channel groups be arranged in parallel, and flow-guiding channel group comprises multiple flow-guiding channel, and staggered between each flow-guiding channel in each flow-guiding channel group.
Further, above-mentioned flow-guiding channel comprise transversely or longitudinal extension the first flow-guiding channel and along the second flow-guiding channel extended perpendicular to the bearing of trend of the first flow-guiding channel, the first flow-guiding channel is not communicated with the second flow-guiding channel.
Further, above-mentioned first flow-guiding channel is one or more, and the second flow-guiding channel is one or more.
Further, the arrangement mode of above-mentioned flow-guiding channel is: E, porous electrode block are provided with multiple first flow-guiding channel, and the plurality of first flow-guiding channel is divided into multiple first flow-guiding channel group, at least one the second flow-guiding channels are set between adjacent two the first flow-guiding channel groups, each first flow-guiding channel group comprises multiple first flow-guiding channels be arranged in parallel, and the first adjacent flow-guiding channel is staggered, or F, porous electrode block is provided with one or more " T " font flow-guiding channel group, " T " font flow-guiding channel group comprises first flow-guiding channel and second flow-guiding channel in the middle part of this first flow-guiding channel, the second flow-guiding channel in " T " font flow-guiding channel group is not communicated with the first flow-guiding channel, when " T " font flow-guiding channel group is multiple, in two adjacent " T " font flow-guiding channel groups, two the second flow-guiding channels are parallel to each other, two the first flow-guiding channels are positioned at the difference end of corresponding second flow-guiding channel, each adjacent " T " font flow-guiding channel group is not communicated with each other, or G, porous electrode block are provided with one or more " I " font flow-guiding channel group, " I " font flow-guiding channel group comprises parallel two the first flow-guiding channels and two ends second flow-guiding channel respectively in the middle part of two the first flow-guiding channels be oppositely arranged, second flow-guiding channel is not communicated with the first flow-guiding channel, when " I " font flow-guiding channel group is multiple, and each " I " font flow-guiding channel group is not communicated with each other.
Further, above-mentioned flow-guiding channel comprise transversely or longitudinal extension the first flow-guiding channel and along the second flow-guiding channel extended perpendicular to the bearing of trend of the first flow-guiding channel, the first flow-guiding channel is connected with the second flow-guiding channel.
Further, the arrangement mode of above-mentioned flow-guiding channel comprises: H, porous electrode block are provided with one or more " Z " font flow-guiding channel group, " Z " font flow-guiding channel group comprises two the first flow-guiding channels and second flow-guiding channel, two the first flow-guiding channels are separately positioned on the both sides of the second flow-guiding channel, and different from the second flow-guiding channel respectively end of two the first flow-guiding channels is connected, when " Z " font flow-guiding channel group is multiple, and each " Z " font flow-guiding channel group is not communicated with each other.
Further, above-mentioned porous electrode block of working as is rectangular, comprise relative first side and second side and be connected the 3rd relative side and the four side of first side and second side, one end towards first side of 3rd side is formed towards the first isolation projection of the outside projection of the 3rd side, and one end towards second side of four side is formed towards the second isolation projection of the outside projection of four side.
According to a further aspect in the invention, additionally provide a kind of liquid stream battery stack, comprise at least one flow battery, this flow battery is above-mentioned flow battery.
According to a further aspect in the invention, additionally provide a kind of flow battery system, comprise at least one flow battery, this flow battery is above-mentioned flow battery.
Porous electrode of the present invention is combined by porous electrode block, the first horizontal flow-guiding channel is formed between adjacent two porous electrode blocks, make electrolyte in the guide functions current downflow of the first horizontal conducting runner, decrease the liquid flowing resistance that porous electrode block causes electrolyte flow, significantly reduce the liquid drift angle needed for electrolyte flow, improve the energy efficiency of flow battery; Simultaneously, transverse edge due to each porous electrode block has the first horizontal flow-guiding channel, thus electrolyte infiltrates in each block porous electrode block under uniform liquid pressure effect, improve the homogeneity of fluid flow, decrease the concentration polarization because electrolyte flow inequality causes, improve the voltage efficiency of flow battery system.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
Accompanying drawing form this specification a part, for understanding the present invention further, accompanying drawing shows the preferred embodiments of the present invention, and be used for principle of the present invention is described together with specification.In figure:
Fig. 1 shows the structural representation of liquid stream battery stack of the prior art;
Fig. 2 shows the structural representation of flow battery system of the prior art;
Fig. 3 shows porous electrode and collector plate combined planar structural representation;
Fig. 4 a shows the part-structure schematic diagram of flow battery according to a first embodiment of the present invention;
Fig. 4 b shows flow battery planar structure schematic diagram according to a first embodiment of the present invention;
Fig. 5 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a second embodiment of the present invention;
Fig. 6 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a third embodiment of the present invention;
Fig. 7 a shows the planar structure schematic diagram of the porous electrode block of flow battery according to a fourth embodiment of the present invention;
Fig. 7 b shows the planar structure schematic diagram of the porous electrode block of flow battery according to a fifth embodiment of the present invention;
Fig. 8 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a sixth embodiment of the present invention;
Fig. 9 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a seventh embodiment of the present invention;
Figure 10 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a eighth embodiment of the present invention;
Figure 11 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a ninth embodiment of the present invention;
Figure 12 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a tenth embodiment of the present invention;
Figure 13 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a 11th embodiment of the present invention; And
Figure 14 shows the planar structure schematic diagram of the porous electrode block of flow battery according to a 12th embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in embodiments of the invention is described in detail, but following embodiment and accompanying drawing are only understand the present invention, and the present invention can not be limited, the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
For the ease of statement, the frame at porous electrode inlet and liquid outlet place is defined as horizontal frame by the present invention, and the frame vertical with horizontal frame is defined as longitudinal frame, as shown in Figure 3.But horizontal frame of the present invention and longitudinal frame can not be confined to the direction shown in Fig. 3, the scheme identical with technical scheme essence of the present invention with the invention belongs to same inventive concept is all within protection scope of the present invention.
In the typical execution mode of one of the present invention, provide a kind of flow battery, comprise liquid flow frame 1, collector plate 2, porous electrode 3 and barrier film 4, porous electrode 3 is embedded in the cavity of liquid flow frame 1, collector plate 2 fits in the side of porous electrode 3, barrier film 4 fits in the side of porous electrode 3 away from collector plate 2, there is in two frames that liquid flow frame 1 is opposing parallel inlet 12 and liquid outlet 13 that electrolysis liquid flows into or flows out porous electrode 3, there is between inlet 12 and porous electrode 3 the first transverse flow channels 32 that electrolysis liquid laterally circulates, there is between liquid outlet 13 and porous electrode 3 the second transverse flow channels 33 that electrolysis liquid laterally circulates, this porous electrode 3 comprises at least two the porous electrode blocks 30 be fitted in collector plate 2, the first horizontal flow-guiding channel 34 is formed between adjacent porous electrode block 30, first horizontal flow-guiding channel 34 is through the first embodiment as shown in figures 4 a and 4b on the thickness direction of porous electrode 3.
Porous electrode 3 of the present invention is combined by porous electrode block 30, the first horizontal flow-guiding channel 34 is formed between adjacent two porous electrode blocks 30, make electrolyte in the guide functions current downflow of the first horizontal conducting runner 34, decrease the liquid flowing resistance that porous electrode block 30 pairs of electrolyte flow cause, significantly reduce the liquid drift angle needed for electrolyte flow, improve the energy efficiency of flow battery; Simultaneously, transverse edge due to each porous electrode block 30 has the first horizontal flow-guiding channel 34, thus electrolyte infiltrates in each block porous electrode block 30 under uniform liquid pressure effect, improve the homogeneity of fluid flow, decrease the concentration polarization because electrolyte flow inequality causes, improve the voltage efficiency of flow battery system.
First horizontal flow-guiding channel 34 of the present invention is parallel with the second transverse flow channels 33 with the first transverse flow channels 32, and the length of the first horizontal flow-guiding channel 34 is identical with the transverse width of porous electrode 3.The first horizontal flow-guiding channel that porous electrode block 30 is formed and the horizontal direction running through porous electrode 3 of porous electrode 3, electrolyte is flowed freely in a lateral direction the whole of porous electrode 3, thus form homogeneous pressure in the inside of whole porous electrode block 30, and the compound mode of this horizontal flow-guiding channel 34 is simple, be easy to realize.
In a kind of preferred embodiment of the present invention, be provided with the flow-guiding channel 31 of electrolysis liquid flowing in this porous electrode block 30, the direction of running through of flow-guiding channel 31 extends along the thickness direction of porous electrode block 30.
Porous electrode block 30 inside is provided with the flow-guiding channel 31 of electrolysis liquid circulation, electrolyte is under the guide functions of flow-guiding channel 31, decrease the liquid flowing resistance that porous electrode block 30 pairs of electrolyte flow cause, significantly reduce the liquid drift angle needed for electrolyte flow, thus decrease the pump consumption of flow battery system, improve the energy efficiency of flow battery system; And, when electrolyte flows in flow-guiding channel 31, uniformly penetrating in the porous electrode block 30 of flow-guiding channel 31 both sides, further increase the homogeneity of the fluid flow in whole porous electrode 3, decrease the concentration polarization because electrolyte flow inequality causes, improve the voltage efficiency of flow battery system.
In a kind of preferred embodiment of the present invention, flow-guiding channel 31 is the horizontal flow-guiding channel extended transversely or the longitudinal flow-guiding channel extended longitudinally.Flow-guiding channel 31 extends transversely or extends longitudinally, the uniform liquid stream pressure that flow-guiding channel 31 with the contact-making surface of porous electrode block 30 are formed, thus be delivered to the position that flow-guiding channel 31 is not set in porous electrode block 30 and also can form relatively uniform liquid stream pressure, make the liquid stream of porous electrode block 30 inside realize Uniform Flow.
Flow-guiding channel 31 in porous electrode block 30 of the present invention is one or more.The object that porous electrode block 30 designs flow-guiding channel 31 reduces porous electrode block 30 inside to the drag effect of the electrolyte also guide functions of realization to electrolyte, therefore, no matter the number of flow-guiding channel 31 is one or multiplely can plays the guide functions of electrolyte thus realize the effect of electrolyte in the inner homogeneous flowing of porous electrode 3.
When flow-guiding channel 31 is one, flow-guiding channel 31 is arranged on the center line of porous electrode block 30.The second embodiment as shown in Figure 5, when the center line at porous electrode block 30 being arranged a flow-guiding channel 31, on the center line of this flow-guiding channel 31 porous electrode block 30, the electrolyte being distributed in porous electrode block 30 inside of flow-guiding channel 31 both sides can realize Uniform Flow under the homogeneous pressure of the electrolyte of flow-guiding channel 31 inside.
When flow-guiding channel 31 is multiple, the arrangement mode of flow-guiding channel 31 can be: A, each flow-guiding channel 31 be arranged in parallel, and the two ends of each flow-guiding channel 31 are identical to the distance at the edge of the porous electrode block 30 vertical with flow-guiding channel 31 bearing of trend.The 3rd embodiment as shown in Figure 6, flow-guiding channel 31 is arranged with arrangement mode A, porous electrode block 30 between two adjacent flow-guiding channels 31 spacing can equal also can be different, when adjacent flow-guiding channel 31 spacing along electrolyte longitudinal flow direction reduce time, the volume in the porous electrode region between flow-guiding channel 31 also reduces along same direction, therefore the flows decrease of the prolongation electrolyte of the glide path along with electrolyte is more effectively avoided, the liquid pressure to porous electrode region produces is caused to diminish, the problem that electrolyte flow rate reduces further.Adopt arrangement mode A, electrolyte in flow-guiding channel 31 produces homogeneous pressure to the porous electrode region that it will flow through, flow-guiding channel 31 not only can be arranged in the mode of the horizontal expansion shown in Fig. 6, also can arrange in the mode of longitudinal extension, and the spacing of adjacent flow-guiding channel 31 can equal also can be unequal, the spacing of preferably adjacent flow-guiding channel 31 reduces along the direction of electrolyte lateral flow.
When flow-guiding channel 31 is multiple, the arrangement mode of flow-guiding channel 31 can also be: B, each flow-guiding channel 31 be arranged in parallel, and adjacent guide passage 31 is staggered.The 4th embodiment as shown in Figure 7a, the flow-guiding channel 31 of horizontal expansion carries out staggered with arrangement mode B, the spacing of adjacent flow-guiding channel 31 can equal also can be unequal, the spacing of preferably adjacent flow-guiding channel 31 reduces along the direction of electrolyte longitudinal flow, and the 5th embodiment as shown in Figure 7b, the flow-guiding channel 31 of longitudinal extension is to carry out staggered with arrangement mode B, the spacing of adjacent flow-guiding channel 31 can equal also can be unequal, the spacing of preferably adjacent flow-guiding channel 31 reduces along the direction of electrolyte lateral flow, can make to produce certain pressure to electrolyte flow between adjacent flow-guiding channel 31.
When flow-guiding channel 31 is multiple, the arrangement mode of flow-guiding channel 31 can also be: C, flow-guiding channel 31 are divided into the multiple flow-guiding channel groups be arranged in parallel, flow-guiding channel group comprises multiple flow-guiding channel 31, and in adjacent guide passage group, flow-guiding channel 31 is staggered.The 6th embodiment as shown in Figure 8, the flow-guiding channel 31 of horizontal expansion is arranged with arrangement mode C, combine the advantage of arrangement mode A and B, therefore, the liquid drift angle that the setting of above-mentioned arrangement mode flow-guiding channel 31 reduces needed for electrolyte flow realizes homogeneous flowing in porous electrode block 30 inside.
When flow-guiding channel 31 is multiple, the arrangement mode of flow-guiding channel 31 can also be: D, flow-guiding channel 31 are divided into the multiple flow-guiding channel groups be arranged in parallel, flow-guiding channel group comprises multiple flow-guiding channel 31, and staggered between each flow-guiding channel 31 in each flow-guiding channel group.The 7th embodiment as shown in Figure 9, also can realize the technique effect with arrangement mode as shown in Figure 8 when the flow-guiding channel 31 of longitudinal extension is arranged with arrangement mode C.
In the another kind of preferred embodiment of the present invention, flow-guiding channel 31 comprises transversely or the first flow-guiding channel of longitudinal extension and the second flow-guiding channel of extending along the bearing of trend perpendicular to the first flow-guiding channel, and the first flow-guiding channel is not communicated with the second flow-guiding channel.The flow-guiding channel 31 of horizontal expansion and the flow-guiding channel 31 of longitudinal extension are comprehensively arranged, both achieved the transverse direction of electrolyte in flow-guiding channel 31 and longitudinally circulated, and, the liquid stream pressure that electrolyte is produced in porous electrode block 30 inside is more even, better achieves the effect of electrolyte in the inner homogeneous flowing of porous electrode block 30.
First flow-guiding channel of above-described embodiment is one or more, and the second flow-guiding channel is one or more.When flow-guiding channel is the combined flow channel of the first flow-guiding channel and the second flow-guiding channel, the number of the first flow-guiding channel and the second flow-guiding channel can according to the specific design way selection of flow-guiding channel, and no matter the number of flow-guiding channel is one or multiplely can plays the guide functions of electrolyte thus realize the effect of electrolyte in the inner homogeneous flowing of porous electrode 3.
In a kind of specific embodiment of the present invention, the arrangement mode of above-mentioned flow-guiding channel 31 is: E, porous electrode block 30 are provided with multiple first flow-guiding channel, and the plurality of first flow-guiding channel is divided into multiple first flow-guiding channel group, at least one the second flow-guiding channels are set between adjacent two the first flow-guiding channel groups, each first flow-guiding channel group comprises multiple first flow-guiding channels be arranged in parallel, and the first adjacent flow-guiding channel is staggered.The 8th embodiment as shown in Figure 10, flow-guiding channel 31 is arranged with arrangement mode E, porous electrode is divided into uniform several porous electrode region by the second flow-guiding channel of horizontal expansion, the parallel distribution of first flow-guiding channel 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 block 30 that an inside has the homogeneous distribution of electrolyte, when the second flow-guiding channel longitudinal extension made in Figure 10 and the first flow-guiding channel horizontal expansion time, also above-mentioned electrolyte can be realized in the inner homogeneous distribution of porous electrode block 30.
In the another kind of specific embodiment of the present invention, the arrangement mode of above-mentioned flow-guiding channel 31 is: F, porous electrode block 30 is provided with one or more " T " font flow-guiding channel group, " T " font flow-guiding channel group comprises first flow-guiding channel and second flow-guiding channel in the middle part of this first flow-guiding channel, the second flow-guiding channel in " T " font flow-guiding channel group is not communicated with the first flow-guiding channel, when " T " font flow-guiding channel group is multiple, in two adjacent " T " font flow-guiding channel groups, two the second flow-guiding channels are parallel to each other, two the first flow-guiding channels are positioned at the difference end of corresponding second flow-guiding channel, each adjacent " T " font flow-guiding channel group is not communicated with each other.9th embodiment as shown in figure 11, when flow-guiding channel 31 is arranged with arrangement mode E, " T " font can with as shown in figure 11 just " T " font and " T " font cross arrangement, also can all so that just the arrangement of " T " font also can all to fall the arrangement of " T " font, and the spacing distance between first flow-guiding channel of each " T " font and the second flow-guiding channel can be the same or different.Liquid stream pressure around " T " font is homogeneous, and the number of " T " font is more, and the flow-guiding channel of porous electrode block 30 inside is more, and the resistance that electrolyte flow is subject in porous electrode block 30 is less, electrolyte more easily realize homogeneous effect.
In another specific embodiment of the present invention, the arrangement mode of flow-guiding channel 31 is: G, porous electrode block 30 are provided with one or more " I " font flow-guiding channel group, " I " font flow-guiding channel group comprises parallel two the first flow-guiding channels and two ends second flow-guiding channel respectively in the middle part of two the first flow-guiding channels be oppositely arranged, second flow-guiding channel is not communicated with the first flow-guiding channel, when " I " font flow-guiding channel group is multiple, and each " I " font flow-guiding channel group is not communicated with each other.。Tenth embodiment as shown in figure 12, when flow-guiding channel 31 is arranged with arrangement mode F, " I " font distributes by shown in Figure 12, liquid stream pressure around " I " font is homogeneous, and the number of " I " font is more, the flow-guiding channel of porous electrode block 30 inside is more, the resistance that electrolyte flow is subject in porous electrode block 30 is less, electrolyte more easily realize homogeneous effect.
In another preferred embodiment of the present invention, flow-guiding channel 31 comprise transversely or longitudinal extension the first flow-guiding channel and along the second flow-guiding channel extended perpendicular to the bearing of trend of the first flow-guiding channel, the first flow-guiding channel is connected with the second flow-guiding channel.The flow-guiding channel 31 of horizontal expansion and the flow-guiding channel 31 of longitudinal extension are comprehensively arranged, both achieved the transverse direction of electrolyte in flow-guiding channel 31 and longitudinally circulated, and first flow-guiding channel be connected with the second flow-guiding channel and enhance the mobility of electrolyte in flow-guiding channel 31, the liquid stream pressure that electrolyte is produced in porous electrode block 30 inside is more even, better achieves the effect of electrolyte in the inner homogeneous flowing of porous electrode block 30.
In a kind of specific embodiment of the present invention, the arrangement mode of flow-guiding channel 31 comprises: H, porous electrode block 30 are provided with one or more " Z " font flow-guiding channel group, " Z " font flow-guiding channel group comprises two the first flow-guiding channels and second flow-guiding channel, two the first flow-guiding channels are separately positioned on the both sides of the second flow-guiding channel, and different from the second flow-guiding channel respectively end of two the first flow-guiding channels is connected, when " Z " font flow-guiding channel group is multiple, and each " Z " font flow-guiding channel group is not communicated with each other.11 embodiment as shown in figure 13, according to the flow-guiding channel arranged shown in Figure 13 in porous electrode block 30, electrolyte flows in the stream that " Z " font is formed, the pressure raw homogeneous to the liquid miscarriage around this " Z " font, and the number of " Z " font is more, the flow-guiding channel of porous electrode block 30 inside is more, the resistance that electrolyte flow is subject in porous electrode block 30 is less, more easily realizing all and the effect differed of electrolyte.
In the another kind of preferred embodiment of the present invention, porous electrode block 30 is rectangular, comprise relative first side and second side and be connected the 3rd relative side and the four side of first side and second side, one end towards first side of 3rd side is formed towards the first isolation projection 35 of the outside projection of the 3rd side, and one end towards second side of four side is formed towards the second isolation projection 36 of the outside projection of four side.12 embodiment as shown in figure 14, at the left hand edge of porous electrode block 30, the first isolation projection 35 is set, at the right hand edge of porous electrode block 30, the second isolation projection 36 is set, thus make the electrolyte flowing into porous electrode block 30 in advance from the horizontal and vertical common infiltration of porous electrode block 30, make the homogeneity of the electrolyte of porous electrode block 30 inside better.
In another typical embodiment of the present invention, additionally provide a kind of liquid stream battery stack and a kind of flow battery system, comprise at least one flow battery, flow battery is flow battery of the present invention.
Achieve at flow battery of the present invention on the basis of the homogeneity of porous electrode 3 electrolyte inside flowing, decrease the pressure reduction of the battery pile be made up of flow battery, and then decrease the consumption of liquor pump, improve the efficiency of flow battery system.
These are 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 (4)
1. a flow battery, comprise liquid flow frame (1), collector plate (2), porous electrode (3) and barrier film (4), described porous electrode (3) is embedded in the cavity of described liquid flow frame (1), described collector plate (2) fits in the side of described porous electrode (3), described barrier film (4) fits in the side of described porous electrode (3) away from described collector plate (2), there is in two frames that described liquid flow frame (1) is opposing parallel inlet (12) and liquid outlet (13) that electrolysis liquid flows into or flows out described porous electrode (3), it is characterized in that, there is between described inlet (12) and described porous electrode (3) the first transverse flow channels (32) that electrolysis liquid laterally circulates, there is between described liquid outlet (13) and described porous electrode (3) the second transverse flow channels (33) that electrolysis liquid laterally circulates, described porous electrode (3) comprises at least two the porous electrode blocks (30) be fitted in described collector plate (2), the first horizontal flow-guiding channel (34) is formed between adjacent described porous electrode block (30), described first horizontal flow-guiding channel (34) is through on the thickness direction of described porous electrode (3), wherein, described first horizontal flow-guiding channel (34) is parallel with described second transverse flow channels (33) with described first transverse flow channels (32), the length of described first horizontal flow-guiding channel (34) is identical with the transverse width of described porous electrode (3), the flow-guiding channel (31) of electrolysis liquid flowing is provided with in described porous electrode block (30), the direction of running through of described flow-guiding channel (31) extends along the thickness direction of described porous electrode block (30),
When described flow-guiding channel (31) comprise transversely or longitudinal extension the first flow-guiding channel and along the second flow-guiding channel extended perpendicular to the bearing of trend of described first flow-guiding channel, and described first flow-guiding channel is not when being communicated with described second flow-guiding channel, the arrangement mode of described flow-guiding channel (31) is:
E, described porous electrode block (30) are provided with multiple first flow-guiding channel, and the plurality of first flow-guiding channel is divided into multiple first flow-guiding channel group, between adjacent two the first flow-guiding channel groups, the second flow-guiding channel described at least one is set, each first flow-guiding channel group comprises multiple first flow-guiding channels be arranged in parallel, and adjacent described first flow-guiding channel is staggered; Or
F, described porous electrode block (30) is provided with one or more " T " font flow-guiding channel group, described " T " font flow-guiding channel group comprises described first flow-guiding channel and described second flow-guiding channel in the middle part of this first flow-guiding channel, described second flow-guiding channel in described " T " font flow-guiding channel group is not communicated with described first flow-guiding channel, when described " T " font flow-guiding channel group is multiple, in " T " font flow-guiding channel group described in adjacent two, two the second flow-guiding channels are parallel to each other, two the first flow-guiding channels are positioned at the difference end of corresponding second flow-guiding channel, each adjacent described " T " font flow-guiding channel group is not communicated with each other, or
G, described porous electrode block (30) are provided with one or more " I " font flow-guiding channel group, described " I " font flow-guiding channel group comprises parallel two the first flow-guiding channels and two ends described second flow-guiding channel respectively in the middle part of described two the first flow-guiding channels be oppositely arranged, described second flow-guiding channel is not communicated with described first flow-guiding channel, when described " I " font flow-guiding channel group is multiple, and each described " I " font flow-guiding channel group is not communicated with each other;
When described flow-guiding channel (31) comprise transversely or longitudinal extension the first flow-guiding channel and along the second flow-guiding channel extended perpendicular to the bearing of trend of described first flow-guiding channel, and described first flow-guiding channel is when being connected with described second flow-guiding channel
The arrangement mode of described flow-guiding channel (31) is:
H, described porous electrode block (30) are provided with one or more " Z " font flow-guiding channel group, described " Z " font flow-guiding channel group comprises two the first flow-guiding channels and second flow-guiding channel, two described first flow-guiding channels are separately positioned on the both sides of the second flow-guiding channel, and different from the described second flow-guiding channel respectively end of two described first flow-guiding channels is connected, when described " Z " font flow-guiding channel group is multiple, and each described " Z " font flow-guiding channel group is not communicated with each other.
2. flow battery according to claim 1, it is characterized in that, when described porous electrode block (30) is rectangular, comprise relative first side and second side and be connected the 3rd relative side and the four side of described first side and second side, one end towards first side of described 3rd side is formed towards the first isolation projection (35) of the outside projection of the 3rd side, and one end towards second side of described four side is formed towards the second isolation projection (36) of the outside projection of four side.
3. a liquid stream battery stack, comprises at least one flow battery, it is characterized in that, described flow battery is the flow battery described in claim 1 or 2.
4. a flow battery system, comprises at least one flow battery, it is characterized in that, described flow battery is the flow battery described in claim 1 or 2.
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| US20150364767A1 (en) * | 2013-01-31 | 2015-12-17 | Dongfang Electric Corporation | Porous electrode assembly, liquid-flow half-cell, and liquid-flow cell stack |
| CN103094600B (en) * | 2013-01-31 | 2015-09-23 | 中国东方电气集团有限公司 | A kind of flow half-cell and the liquid stream battery stack with it |
| CN103117402B (en) * | 2013-01-31 | 2015-04-29 | 中国东方电气集团有限公司 | Porous electrode assembly, liquid-flow half-cell and liquid-flow cell stack |
| CN109716571A (en) * | 2016-08-04 | 2019-05-03 | 昭和电工株式会社 | Redox flow batteries |
| WO2018025406A1 (en) | 2016-08-05 | 2018-02-08 | 昭和電工株式会社 | Redox flow battery |
| CN107845823B (en) * | 2016-09-21 | 2023-08-22 | 中国科学院大连化学物理研究所 | Electrode frame structure of flow battery pile |
| TWI661605B (en) * | 2018-10-19 | 2019-06-01 | Industrial Technology Research Institute | Flow battery stack |
| CN112787012B (en) * | 2019-11-11 | 2022-05-27 | 北京好风光储能技术有限公司 | Battery rack, operation method thereof and energy storage power station provided with battery rack |
| DE102022115645A1 (en) | 2022-06-23 | 2023-12-28 | Schaeffler Technologies AG & Co. KG | Redox flow battery and method for producing a redox flow battery |
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| US6905797B2 (en) * | 2001-04-12 | 2005-06-14 | Squirrel Holdings Ltd. | Porous mat electrodes for electrochemical reactor having electrolyte solution distribution channels |
| JP3996762B2 (en) * | 2001-11-21 | 2007-10-24 | 住友電気工業株式会社 | Redox flow battery electrode |
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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 |
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