CN220272515U - Flow channel for flow battery, flow frame device and flow battery - Google Patents
Flow channel for flow battery, flow frame device and flow battery Download PDFInfo
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- CN220272515U CN220272515U CN202321771721.3U CN202321771721U CN220272515U CN 220272515 U CN220272515 U CN 220272515U CN 202321771721 U CN202321771721 U CN 202321771721U CN 220272515 U CN220272515 U CN 220272515U
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- flow
- liquid
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- channel
- flow battery
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- 239000007788 liquid Substances 0.000 claims abstract description 83
- 230000003247 decreasing effect Effects 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000003792 electrolyte Substances 0.000 description 12
- 229910052720 vanadium Inorganic materials 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
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- Fuel Cell (AREA)
Abstract
The utility model provides a liquid flow channel for a liquid flow battery, which comprises a liquid flow inlet and outlet, a flow guiding region and a flow dividing region which are sequentially arranged, wherein the liquid flow inlet and outlet is communicated with a first end of the flow guiding region, and a plurality of strip flow guiding plates with decreasing lengths are arranged in the flow guiding region at intervals along the direction from the liquid flow inlet and outlet to a second end of the flow guiding region so as to form the flow guiding channel; a plurality of flow dividing columns are arranged in the flow dividing region to form a flow dividing flow passage. The utility model provides a flow frame device for a flow battery based on the flow channel for the flow battery, and a cover plate with a consistent shape is covered on each flow channel for the flow battery. The utility model also provides a flow battery based on the flow frame device for the flow battery. Through improving liquid flow channel for liquid velocity of flow evenly distributed improves energy conversion efficiency, prolongs the life of group battery.
Description
Technical Field
The utility model relates to the technical field of flow batteries, in particular to a flow channel for a flow battery, a flow frame device and the flow battery.
Background
With the increasingly serious environmental pollution and carbon emission problems caused by the utilization of fossil energy, the development and use of green renewable energy are increasingly receiving attention. However, renewable energy power generation relies on natural conditions such as solar radiation intensity and wind speed, and there are significant fluctuations in the power generation process, thereby generating intermittent power, and converting such intermittent power to a stable base power remains a significant challenge. The energy storage system is introduced, so that the electric power generated by renewable energy sources can be stored in real time and released as required, and the electric power system is more stable and flexible; the application of the all-vanadium redox flow battery in an energy storage system is more and more important, and the all-vanadium redox flow battery is considered to be an ideal choice for renewable energy storage such as wind energy and the like, and large and medium-sized energy storage systems such as power grid peak shaving and the like.
In the all-vanadium redox flow battery, the flow speed and the distribution uniformity of the liquid influence the distribution uniformity of active substances, and the performance of the all-vanadium redox flow battery is directly influenced. The reasonable liquid flow frame structural design can avoid phenomena such as flowing dead zone, felt burning and the like which occur due to uneven liquid flow velocity distribution, and meanwhile, the pump loss can be reduced, and the service life of the battery pack is prolonged.
CN110970634a discloses an electrode frame for an all-vanadium redox flow battery and application, since the left end of the inlet main runner groove at the upper part is communicated with the right end of the liquid inlet distribution groove at the right side, the right end of the outlet main runner groove at the lower part is communicated with the left end of the liquid outlet distribution groove at the left side, the turning angle of the main runner groove is reduced, the flow resistance is reduced, and the electrolyte is distributed more uniformly when reaching the liquid distribution runner. Besides, the flow area of the inlet liquid-dividing flow channel is increased, and the tapered design is adopted, so that the flow rate of the electrolyte is increased, and meanwhile, the electrolyte can be accelerated secondarily, and the flow speed of the electrolyte in the electrode is further increased. However, in the above technical scheme, the inlet main runner is in the middle of the split runner, and the intervals of the split runners are all fixed, so that the electrolyte still possibly cannot reach the edge split runner, the split effect is poor, the utilization rate of the electrolyte is low, the felt burning phenomenon occurs in the battery testing process, and certain potential safety hazards exist.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, and provides a liquid flow channel for a liquid flow battery, a liquid flow frame device and the liquid flow battery.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the flow channel for the flow battery comprises a flow inlet and a flow outlet, a flow guiding region and a flow dividing region which are sequentially arranged, wherein the flow inlet and the flow outlet are communicated with the first end of the flow guiding region, and a plurality of strip flow guiding plates with decreasing lengths are arranged in the flow guiding region at intervals along the direction from the flow inlet and the flow outlet to the second end of the flow guiding region so as to form the flow guiding channel; a plurality of flow dividing columns are arranged in the flow dividing region to form a flow dividing flow passage.
Based on the above, the distance between the end wall of the second end of the flow guiding area and the adjacent long strip flow guiding plates is larger than or equal to the distance between any two long strip flow guiding plates.
Based on the above, the split columns are equal-diameter and equal-height split columns, and the spacing between any two split columns is the same.
The utility model provides a flow frame device for a flow battery based on the flow channel for the flow battery, which comprises a frame body, wherein an electrode accommodating cavity is arranged in the middle of the frame body so as to place a graphite felt porous electrode; the liquid flow channels for the liquid flow batteries are symmetrically arranged at the centers of two sides of the frame body, the corner areas, far away from the liquid flow inlets and outlets, of the liquid flow channels for the liquid flow batteries are oblique edges, and each liquid flow channel for the liquid flow battery is communicated with the graphite felt porous electrode.
Based on the above, the flow channels for the flow batteries are also covered with cover plates with the same shape.
Based on the above, two corner areas of the electrode accommodating cavity, which are close to the flow dividing flow channel, are oblique edges.
Based on the above, the two sides of the frame body are respectively and centrally symmetrically provided with through holes, and each through hole and one liquid inlet and outlet are positioned at one side and symmetrically arranged.
Based on the above, the liquid inlet and outlet and the through hole are respectively provided with a sealing groove and a groove, the front face of the frame body is provided with a sealing groove adjacent to the frame body boundary, and the back face of the frame body is provided with a sealing groove adjacent to the electrode accommodating cavity.
The utility model provides a flow battery based on the flow frame device for the flow battery, which comprises the flow frame device for the flow battery.
Compared with the prior art, the liquid flow channel for the liquid flow battery provided by the utility model has substantial characteristics and improvements, and particularly comprises a plurality of strip guide plates with decreasing lengths, which are arranged at intervals along the liquid flow inlet and outlet to the other end of the guide area, wherein the strip guide plates and the side edges of the guide area form the guide flow channel, so that the transverse length of the flow channel is prolonged, electrolyte is effectively and uniformly distributed, the flow velocity of electrode liquid on the porous electrode is balanced, and the energy conversion efficiency of the all-vanadium liquid flow battery is improved.
The cover plate is arranged corresponding to the liquid flow channel for the liquid flow battery, and can effectively prevent the situation that the flow channel is blocked due to swelling of the perfluorinated sulfonic acid ion membrane in the charging and discharging process, and meanwhile, the stress of the flow dividing column is uniformly distributed, so that the flow dividing column is prevented from deforming, and the service life of the battery pack is prolonged.
The utility model is provided with the positioning boss on the shunt column so as to improve the assembly efficiency of the battery.
Drawings
Fig. 1 is a schematic view of the flow channel for a flow battery according to the present utility model.
Fig. 2 is a schematic structural view of a flow frame device for a flow battery according to the present utility model.
In the figure: 1. a frame; 2. a cover plate; 3. an electrode accommodating chamber; 4. a beveled edge; 5. a split column; 6. positioning the boss; 7. a long guide plate; 8. an end wall; 9. a liquid flow inlet; 10. a liquid flow outlet; 11. a through hole; 12. sealing the groove; 13. a liquid flow inlet and outlet; 14. a diversion area; 15. a split area.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Example 1
The embodiment provides a flow channel for a flow battery, as shown in fig. 1, which comprises a flow inlet and outlet 13, a flow guiding area 14 and a flow dividing area 15 which are sequentially arranged, wherein the flow inlet and outlet 13 is communicated with a first end of the flow guiding area 14, and a plurality of strip flow guiding plates 7 with decreasing lengths are arranged in the flow guiding area 14 at intervals along the direction from the flow inlet and outlet 13 to a second end of the flow guiding area 14 so as to form a flow guiding channel; a plurality of flow dividing columns 5 are arranged in the flow dividing area 15 to form a flow dividing flow passage.
The flow dividing columns 5 are equal-diameter equal-height flow dividing columns 5, and the distances between any two flow dividing columns 5 are the same to form a flow dividing channel. The flow distribution channels are arranged at equal intervals, so that electrolyte can be effectively and uniformly distributed, the flow velocity of the electrolyte on the porous electrode is balanced, and the energy conversion efficiency of the all-vanadium redox flow battery is improved.
Further, the long-strip guide plates 7 are distributed along the liquid flow inlet and outlet 13 to the second end of the guide area 1, and the lengths of the long-strip guide plates are gradually decreased, so that the transverse lengths of the flow dividing channels are prolonged, the electrode liquid can reach the farthest flow dividing channel, the flow velocity of the electrode liquid on the porous electrode is comprehensively balanced, and the energy conversion efficiency of the vanadium redox flow battery is further improved.
Example 2
This embodiment differs from embodiment 1 in that: the distance between the end wall 8 of the second end of the flow guiding region 14 and the adjacent long-strip flow guiding plates 7 is larger than or equal to the distance between any two long-strip flow guiding plates 7.
In one embodiment, the number of the long-strip guide plates 7 is 5, the lengths of the long-strip guide plates 7 are 172mm, 75mm, 73mm, 54mm and 14mm from left to right, the distance between two adjacent long-strip guide plates 7 is 6mm, and the distance between the two long-strip guide plates 7 on the far right and the end wall 8 is 13mm.
In another embodiment, the number of the long-strip guide plates 7 is 5, the lengths of the long-strip guide plates are 172mm, 75mm, 73mm, 54mm and 14mm respectively from left to right, and the distance between two adjacent long-strip guide plates 7 is 3mm. The distance between the two rightmost elongated baffles 7 and the end wall 8 is 6mm.
In another embodiment, the number of the long guide plates 7 is 5, the lengths of the long guide plates are 172mm, 75mm, 73mm, 54mm and 14mm respectively from left to right, and the spacing between the barrier strips is 3mm. 13mm is between the two strip guide plates 7 at the rightmost side and the end wall 8.
Example 3
The embodiment provides a flow frame device for a flow battery, as shown in fig. 2, which comprises a frame body 1, wherein an electrode accommodating cavity 3 is arranged in the middle of the frame body 1 so as to place a graphite felt porous electrode; the flow channels for the flow battery described in embodiment 1 or 2 are symmetrically arranged at the centers of two sides of the frame body 1, the corner areas of the flow channels for the flow battery, which are far away from the flow inlets and the flow outlets, are beveled edges 4, and each flow channel for the flow battery is communicated with the graphite felt porous electrode.
In a specific implementation, two sides of the frame body 1 are respectively provided with a flow channel I for the flow battery and a flow channel II for the flow battery; the flow channel I for the flow battery and the flow channel II for the flow battery are centrosymmetric, wherein the flow channel I for the flow battery and the flow channel II for the flow battery can be used as a liquid inflow channel or a liquid outflow channel.
When the liquid inlet and outlet of the liquid flow channel I for the liquid flow battery is the liquid inlet 9, the liquid inlet and outlet of the liquid flow channel II for the liquid flow battery is the liquid outlet 10, at this time, electrolyte enters through the liquid inlet 9 of the liquid flow channel I for the liquid flow battery, flows into the graphite felt porous electrode through the diversion channel and the diversion channel of the liquid flow channel I for the liquid flow battery in sequence, and flows out from the liquid outlet 10 of the liquid flow channel II for the liquid flow battery in sequence.
When the liquid inlet and outlet of the liquid flow channel II for the liquid flow battery is the liquid inlet 9, the liquid inlet and outlet of the liquid flow channel I for the liquid flow battery is the liquid outlet 10, at this time, electrolyte enters through the liquid inlet 9 of the liquid flow channel II for the liquid flow battery, flows into the graphite felt porous electrode through the diversion channel and the diversion channel of the liquid flow channel II for the liquid flow battery in sequence, and flows out from the liquid outlet 10 of the liquid flow channel I for the liquid flow battery in sequence.
It can be understood that the two sides of the frame body 1 are also provided with through holes 11 in central symmetry respectively, each through hole 11 and one liquid inlet and outlet are located at one side, and are symmetrically arranged, wherein each through hole 11 is communicated with the liquid inlet and outlet on the adjacent flow frame device for the flow battery.
Preferably, two corner areas of the electrode accommodating cavity 3 close to the flow dividing channels are beveled edges 4, so that the problem that electrolyte at corners of the porous electrode of the graphite felt is fixed and does not flow is reduced.
Further, in order to prevent the mixing of the two single cells, the liquid inlet and outlet and the through hole 11 are respectively provided with a sealing groove 12 and a groove, the front surface of the frame body 1 is provided with the sealing groove 12 adjacent to the boundary of the frame body 1, and the back surface of the frame body 1 is provided with the sealing groove 12 adjacent to the electrode accommodating cavity 3.
Furthermore, a cover plate 2 with the same shape is further arranged on each flow channel for the flow battery in a covering mode.
In the specific implementation, in order to facilitate the installation of the cover plate 2, the shunt column 5 is provided with a positioning boss 6, and the cover plate 2 is in bolt connection with the positioning boss 6.
The cover plate 2 can effectively prevent the condition that the flow channel is blocked due to the swelling of the perfluorosulfonic acid ion membrane in the charge and discharge process, and meanwhile, the stress of the dam is uniformly blocked by the liquid, so that the deformation of the dam is prevented, and the service life of the battery pack is prolonged.
Example 4
The embodiment provides a flow battery, which comprises the flow frame device for the flow battery described in the embodiment 3.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. A flow channel for a flow battery, characterized in that: the device comprises a liquid flow inlet and outlet, a flow guiding region and a flow dividing region which are sequentially arranged, wherein the liquid flow inlet and outlet is communicated with a first end of the flow guiding region, and a plurality of strip flow guiding plates with decreasing lengths are arranged in the flow guiding region at intervals along the direction from the liquid flow inlet and outlet to a second end of the flow guiding region so as to form a flow guiding flow channel; a plurality of flow dividing columns are arranged in the flow dividing region to form a flow dividing flow passage.
2. The flow channel for a flow battery according to claim 1, wherein: the distance between the end wall of the second end of the flow guiding area and the adjacent long strip flow guiding plates is larger than or equal to the distance between any two long strip flow guiding plates.
3. The flow channel for a flow battery according to claim 1 or 2, characterized in that: the flow dividing columns are equal-diameter and equal-height flow dividing columns, and the distances between any two flow dividing columns are the same.
4. The utility model provides a flow frame device for flow battery which characterized in that: the graphite felt porous electrode comprises a frame body, wherein an electrode accommodating cavity is formed in the middle of the frame body so as to accommodate the graphite felt porous electrode; the flow channels for the flow battery are symmetrically arranged on the centers of two sides of the frame body, the corner areas, away from the flow inlets and the liquid outlets, of the flow channels for the flow battery are oblique edges, and each flow channel for the flow battery is communicated with the graphite felt porous electrode.
5. The flow frame device for a flow battery according to claim 4, wherein: and a cover plate with the same shape is further covered on each flow channel for the flow battery.
6. The flow frame device for a flow battery according to claim 5, wherein: the shunt column is provided with a positioning boss, and the cover plate is connected with the positioning boss through a bolt.
7. The flow frame device for a flow battery according to claim 4, 5 or 6, wherein: two corner areas of the electrode accommodating cavity, which are close to the flow dividing flow channel, are oblique edges.
8. The flow frame device for a flow battery according to claim 4, 5 or 6, wherein: through holes are also formed in the two sides of the frame body in a central symmetry mode, and each through hole and one liquid inlet and outlet are located on one side and are symmetrically arranged.
9. The flow frame device for a flow battery according to claim 8, wherein: the liquid inlet and outlet and the through hole are respectively provided with a sealing groove, the front face of the frame body is provided with a sealing groove close to the boundary of the frame body, and the back face of the frame body is provided with a sealing groove close to the electrode accommodating cavity.
10. A flow battery, characterized by: a flow frame device for a flow battery according to any one of claims 4 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321771721.3U CN220272515U (en) | 2023-07-07 | 2023-07-07 | Flow channel for flow battery, flow frame device and flow battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321771721.3U CN220272515U (en) | 2023-07-07 | 2023-07-07 | Flow channel for flow battery, flow frame device and flow battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220272515U true CN220272515U (en) | 2023-12-29 |
Family
ID=89303238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321771721.3U Active CN220272515U (en) | 2023-07-07 | 2023-07-07 | Flow channel for flow battery, flow frame device and flow battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220272515U (en) |
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2023
- 2023-07-07 CN CN202321771721.3U patent/CN220272515U/en active Active
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