CN211829056U - Flow battery stack - Google Patents
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- CN211829056U CN211829056U CN202020671383.6U CN202020671383U CN211829056U CN 211829056 U CN211829056 U CN 211829056U CN 202020671383 U CN202020671383 U CN 202020671383U CN 211829056 U CN211829056 U CN 211829056U
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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
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Abstract
The utility model relates to a flow battery field specifically is a flow battery pile. The whole flow battery stack is formed by superposing one or more than two basic battery units, the front sides of a positive electrode side electrode plate frame and a negative electrode side electrode plate frame are opposite, a diaphragm is arranged between the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, the diaphragm is respectively fixedly sealed with the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, a positive electrode is placed into an electrode cavity in the positive electrode side electrode plate frame, a negative electrode is placed into an electrode cavity in the negative electrode side electrode plate frame, and the basic battery units are assembled; and (4) fixedly clamping all the basic battery units, the bipolar plates, the current collectors and the end plates by using bolts to form the flow battery stack. The flow cell stack can effectively solve the problems of liquid leakage and liquid mixing of the flow cell stack, and the installation success rate of the flow cell stack is improved. Meanwhile, the design can realize uniform shunting of electrolyte, and can effectively improve the consistency of each unit in the cell stack, thereby improving the efficiency and performance of the cell.
Description
Technical Field
The utility model relates to a flow battery field specifically is a flow battery pile.
Background
Because traditional fossil energy such as coal, oil, natural gas can not be regenerated, the fossil energy can be consumed within 200 years according to the current consumption speed calculation of human beings. Meanwhile, the use of a large amount of fossil energy brings about extremely serious environmental pollution. Therefore, the development and utilization of clean energy (such as solar energy, wind energy, etc.) is a necessary trend for future energy development. However, these energy sources are influenced by natural factors, have discontinuous, unstable and uncontrollable unsteady characteristics, and cannot be continuously and effectively integrated into the power grid, so the energy storage technology becomes a key for the development and utilization of clean energy.
The electric energy storage mode mainly comprises three main types of mechanical energy storage, electrochemical energy storage and electromagnetic energy storage. The optimal technology matched with a new generation power grid is a flow battery technology in electrochemical energy storage, the power and the capacity of the flow battery technology can be separately and independently designed, the charge-discharge reaction is rapid, the application range is wide, and the flow battery technology not only can be applied to peak clipping and valley filling, but also can be used as a standby power supply or emergency power supply, and can also be applied to improving the quality of electric power, regulating the voltage and frequency and the like.
In the process of the flow battery for the commercial application, the most important device is the battery stack, which converts the electric energy into the chemical energy to be stored in the electrolyte solution, and then converts the chemical energy in the electrolyte solution into the electric energy to be released to the power grid or the external load when needed. The cell stack formed by combining a plurality of basic cell units can provide a higher voltage and achieve a higher power than a single cell. Energy storage systems for practical use typically employ a stack or even a combination of multiple stacks.
Important components of the cell pair interior include electrodes, bipolar plates, separators, electrode plate frames, end plates, and the like. In these assemblies, the electrode plate frame plays a role of embedding positive and negative electrodes, a fixed diaphragm and a bipolar plate, and is provided with an inflow channel and an outflow channel of electrolyte, and can uniformly distribute the electrolyte solution to flow into the electrode material, so the design of the electrode plate frame is very important. However, in the prior art, the design of an electrode plate frame is complex, the sealing is difficult, the electrolyte is distributed unevenly, and the use of large-area electrode materials is limited; or the fluid resistance is not designed reasonably, so that the leakage or the liquid leakage of the cell stack is caused; or the inlet and outlet flow passages are not designed reasonably, so that the internal current loss is overlarge.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flow battery piles, can solve the weeping and the cluster liquid problem of flow battery pile effectively.
The technical scheme of the utility model is that:
a flow battery stack is provided with one or more than two basic battery cells, the front surfaces of a positive electrode side electrode plate frame and a negative electrode side electrode plate frame are opposite, a diaphragm is arranged between the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, the diaphragm is respectively and fixedly sealed with the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, a positive electrode is placed into an electrode cavity in the positive electrode side electrode plate frame, a negative electrode is placed into an electrode cavity in the negative electrode side electrode plate frame, and the basic battery cells are assembled; the front of the basic battery unit is provided with a positive side bipolar plate which is connected with an adjacent battery unit or a positive side current collector; and a negative side bipolar plate is arranged behind the basic battery unit and is connected with the adjacent battery unit or a negative side current collector through the negative side bipolar plate.
The flow cell stack is characterized in that rectangular grooves are formed above and below the electrode cavity respectively, a runner cover plate is placed in each groove, a snake-shaped first-stage shunting runner is formed in each groove, the part, close to one side of the electrode cavity, of each first-stage shunting runner is communicated with the electrode cavity through a second-stage shunting runner, and the second-stage shunting runners are formed by uniformly arranging lugs in the horizontal direction.
The flow battery pile is provided with shared flow channels at four corners of each electrode plate frame, wherein: the sharing flow channels which are arranged on the opposite angles of the upper left part and the lower right part are respectively communicated with the corresponding first-stage flow distribution flow channels; the runner cover plate is respectively embedded in the grooves above and below the electrode plate frame, glue is smeared in the gap between the outer side of the runner cover plate and the grooves for sealing, and meanwhile, the communication of the sharing channel, the first-stage flow distribution channel and the second-stage flow distribution channel with the electrode cavity is reserved.
The area of the flow channel cover plate of the flow cell stack is larger than the total area of the first-stage shunt flow channel and the second-stage shunt flow channel, the flow channel cover plate is completely covered on the first-stage shunt flow channel and the second-stage shunt flow channel after being embedded into the positive electrode side electrode plate frame or the negative electrode side electrode plate frame, and the surface of the flow channel cover plate and the surface of the positive electrode side electrode plate frame or the surface of the negative electrode side electrode plate frame form a plane.
The liquid flow battery stack is characterized in that the depth of a groove is 0.5-3 mm, the width of a first-stage flow dividing channel is 2-15 mm, the depth of the first-stage flow dividing channel is 0.5-8 mm, the width of a second-stage flow dividing channel is 2-15 mm, the depth of the second-stage flow dividing channel is 0.5-8 mm, the thickness of a positive electrode side electrode plate frame or a negative electrode side electrode plate frame is 3-10 mm, the thickness of a flow channel cover plate is 0.5-3 mm, and the diameter of a shared flow channel is 5-50 mm.
In the flow battery stack, the size of the positive electrode is the same as that of an electrode cavity in the positive electrode side electrode plate frame, the size of the negative electrode is the same as that of an electrode cavity in the negative electrode side electrode plate frame, the diaphragm is positioned between the positive electrode and the negative electrode, and the length and the width of the diaphragm are both larger than those of the positive electrode or the negative electrode.
In the flow battery stack, a positive side bipolar plate, a positive side current collector and a positive side end plate are sequentially arranged in front of a basic battery unit, a negative side bipolar plate, a negative side current collector and a negative side end plate are arranged behind the basic battery unit, through holes with the same size are formed in the same positions on the positive side end plate, the positive side bipolar plate, the basic battery unit, the negative side bipolar plate and the negative side end plate, and the through holes sequentially penetrate through bolts; during assembly, the positive side end plate, the positive side current collector, the positive side bipolar plate, the basic battery unit, the negative side bipolar plate, the negative side current collector and the negative side end plate are sequentially stacked, the bolt penetrates through the through hole, the front exposed part of the bolt is fixedly screwed in cooperation with the positive side nut, the rear exposed part of the bolt is fixedly screwed in cooperation with the negative side nut, and the flow battery stack is formed.
The whole flow battery stack is formed by overlapping one or more than two basic battery units, and a bipolar plate is arranged between every two adjacent basic battery units.
The utility model has the advantages and beneficial effects that:
1. the utility model discloses flow battery pile simple structure, the equipment is convenient, has improved the installation success rate of flow battery pile, the cost is reduced.
2. The utility model discloses can realize that electrolyte evenly shunts, can effectively improve the uniformity of every unit in the battery pile, and then improve battery efficiency and performance.
3. The design of the battery stack is suitable for all flow battery systems, in particular to zinc-based flow battery systems such as zinc-iron, zinc-bromine, zinc-cerium, zinc-iodine and zinc-manganese.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention.
Fig. 1 is a schematic view of an electrode plate frame according to an embodiment of the present invention;
fig. 2 is a schematic view of an electrode plate frame after a flow channel cover plate is attached according to an embodiment of the present invention;
fig. 3 is an exploded view of a base battery cell according to an embodiment of the present invention;
fig. 4 is a schematic view of a flow cell stack assembly according to an embodiment of the present invention.
In the figure, 1 shares a flow channel; 2, through holes; 3, grooves; 4, a first-stage flow dividing channel; 5 a second-stage flow dividing channel; 6 an electrode cavity; 7 positive electrode side electrode plate frame; 8, a positive electrode; 9 a diaphragm; 10 a flow passage cover plate; 11 a base battery cell; 12 positive electrode-side bipolar plate; 13 positive electrode side current collector; 14 a positive electrode-side end plate; 15, bolts; 16 positive side nut; 17 negative side electrode plate frame; 18 a negative electrode; 19 negative side bipolar plate; 20 bumps; 21 a negative electrode side current collector; 22 a negative side end plate; 23 negative side nut.
Detailed Description
In the specific implementation process, the utility model discloses the assembly method of flow cell stack, concrete step is:
(1) placing the flow channel cover plate into the groove of the electrode plate frame, and sealing the contact position by using glue;
(2) combining the electrode plate frames in pairs, wherein the front sides of the electrode plate frames are opposite, a diaphragm is arranged in the middle of the electrode plate frames, and the contact position of the diaphragm and the electrode plate frames is sealed by glue;
(3) placing electrodes into electrode cavities inside an electrode plate frame to form a basic battery unit;
(4) and sequentially overlapping the end plate, the current collector, the bipolar plate, the basic battery unit, the bipolar plate … …, the basic battery unit, the bipolar plate, the current collector and the end plate, and finally, using a bolt to penetrate through the through hole and match with a nut to be fixed and screwed, thus obtaining the flow battery stack.
The invention will be explained in further detail below with reference to the drawings and with reference to exemplary embodiments.
Examples
As shown in fig. 1 and fig. 3, according to the schematic diagram of the electrode plate frame of an embodiment of the present invention, the middle position of the electrode plate frame (the positive electrode-side electrode plate frame 7 or the negative electrode-side electrode plate frame 17) is an electrode cavity 6 for placing an electrode (the positive electrode 8 or the negative electrode 18); rectangular grooves 3 are respectively formed above and below the electrode cavity 6, the depth of each groove 3 is 1mm, the grooves are used for placing a runner cover plate 10, a snake-shaped first-stage shunting runner 4 is arranged in each groove 3, and the width and the depth of each first-stage shunting runner 4 are 8mm and 2 mm; the part of the first-stage flow distribution channel 4 close to one side of the electrode cavity 6 is communicated with the electrode cavity 6 through a second-stage flow distribution channel 5, the second-stage flow distribution channel 5 is formed by uniformly distributing lugs 20 in the horizontal direction, one second-stage flow distribution channel 5 is arranged between every two adjacent lugs 20, and the width and the depth of the second-stage flow distribution channel 5 are 5mm and 2 mm. Four corners of the electrode plate frame are provided with a shared flow channel 1 with the diameter of phi 20mm, wherein: the sharing flow channels 1 which are arranged on the upper left and the lower right opposite angles are respectively communicated with the corresponding first-stage flow dividing flow channels 4. Through holes 2 with the diameter of 10mm are formed in the electrode plate frame, and the through holes 2 are distributed on the periphery of the electrode plate frame.
As shown in fig. 1 and 2, according to the schematic diagram of the electrode plate frame after the flow channel cover plate is adhered, the upper portion in the figure is the state that the flow channel cover plate 10 is adhered in the groove 3. The thickness of the positive electrode side electrode plate frame 7 or the negative electrode side electrode plate frame 17 is 5mm, and the thickness of the flow channel cover plate 10 is 1 mm. Two runner apron 10 inlay respectively in electrode plate frame upper and lower recess 3 department, and glue is paintd in the gap department between runner apron 10 outside and recess 3 and is sealed, remains the intercommunication of shared channel 1, first order reposition of redundant personnel runner 4 and second order reposition of redundant personnel runner 5 and electrode chamber 6 simultaneously. The area of the runner cover plate 10 is larger than the total area of the first-stage shunt runner 4 and the second-stage shunt runner 5, the first-stage shunt runner 4 and the second-stage shunt runner 5 are completely covered after the runner cover plate 10 is embedded into the positive electrode side electrode plate frame 7 or the negative electrode side electrode plate frame 17, and the surfaces of the runner cover plate 10 and the positive electrode side electrode plate frame 7 or the negative electrode side electrode plate frame 17 form a plane.
As shown in fig. 3 and 4, according to the exploded view of the basic battery cell of an embodiment of the present invention, the size of the positive electrode 8 is the same as the size of the electrode cavity 6 in the positive electrode-side electrode plate frame 7, the size of the negative electrode 18 is the same as the size of the electrode cavity 6 in the negative electrode-side electrode plate frame 17, the diaphragm 9 is located between the positive electrode 8 and the negative electrode 18, and the length and the width of the diaphragm 9 are 10mm larger than those of the positive electrode 8 or the negative electrode 18. Firstly, the front faces of the positive electrode side electrode plate frame 7 and the negative electrode side electrode plate frame 17 are opposite, the diaphragm 9 is placed between the positive electrode side electrode plate frame 7 and the negative electrode side electrode plate frame 17, and the diaphragm 9 is respectively fixed and sealed with the positive electrode side electrode plate frame 7 and the negative electrode side electrode plate frame 17 by glue. Then, the positive electrode 8 is placed in the electrode cavity 6 in the positive electrode-side electrode plate frame 7, and the negative electrode 18 is placed in the electrode cavity 6 in the negative electrode-side electrode plate frame 17, thereby completing the assembly of the basic battery cell 11. The front of the basic battery unit 11 is provided with a positive side bipolar plate 12, and the adjacent battery units or a positive side current collector 13 are connected through the positive side bipolar plate 12; the base cell 11 is followed by a negative side bipolar plate 19, with the adjacent cells or negative side current collectors 21 being connected by the negative side bipolar plate 19.
The utility model discloses in, the electrode plate frame is one or two kinds of above combined material in PVC, PP, PE, POM, PVDF, and bipolar plate is the higher carbon material of electric conductivity.
As shown in fig. 4, according to the utility model discloses a flow battery stack assembly drawing of a specific embodiment, basic battery cell 11 is preceding to be equipped with positive pole side bipolar plate 12 in proper order, positive pole side mass flow body 13, positive pole side end plate 14, basic battery cell 11's back is equipped with negative pole side bipolar plate 19, negative pole side mass flow body 21, negative pole side end plate 22, through-hole 2 of the same size has been seted up to same position department on positive pole side end plate 14, positive pole side bipolar plate 12, basic battery cell 11, negative pole side bipolar plate 19, negative pole side end plate 22 to pass in proper order through bolt 15. The positive electrode side current collector 13 and the negative electrode side current collector 21 have a thickness of 2mm and are used for connecting an external circuit or a load. During assembly, the assembly of the flow battery stack can be completed only by sequentially overlapping the positive electrode side end plate 14, the positive electrode side current collector 13, the positive electrode side bipolar plate 12, the basic battery unit 11, the negative electrode side bipolar plate 19, the negative electrode side current collector 21 and the negative electrode side end plate 22 in sequence, finally penetrating the through hole 2 by using the bolt 15, fixedly screwing the front exposed part of the bolt 15 by matching with the positive electrode side nut 16, and fixedly screwing the rear exposed part of the bolt 15 by matching with the negative electrode side nut 23.
The utility model discloses in, flow battery pile uses glue to seal through forming a basic battery cell with electrode plate frame, runner apron and diaphragm to the emergence of weeping and cluster liquid problem has been avoided. Meanwhile, the flow battery stack is simple in structure, convenient to process and cost-saving.
The embodiment result shows, the utility model discloses flow cell stack covers the runner sealed, and electrode plate frame and diaphragm seal bond constitute basic battery cell, and whole flow cell stack can constitute by the coincide of one or more than two basic battery cells, is a bipolar plate between two adjacent basic battery cells. The utility model discloses flow battery piles is simple effective, and the equipment is convenient, can solve the problem of battery pile weeping and cluster liquid effectively.
The above description is only a partial example of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be within the protection scope of the present invention.
Claims (8)
1. A flow battery stack is characterized in that the flow battery stack is provided with one or more than two basic battery cells, the front sides of a positive electrode side electrode plate frame and a negative electrode side electrode plate frame are opposite, a diaphragm is arranged between the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, the diaphragm is respectively fixedly sealed with the positive electrode side electrode plate frame and the negative electrode side electrode plate frame, a positive electrode is placed into an electrode cavity in the positive electrode side electrode plate frame, a negative electrode is placed into an electrode cavity in the negative electrode side electrode plate frame, and the basic battery cells are assembled; the front of the basic battery unit is provided with a positive side bipolar plate which is connected with an adjacent battery unit or a positive side current collector; and a negative side bipolar plate is arranged behind the basic battery unit and is connected with the adjacent battery unit or a negative side current collector through the negative side bipolar plate.
2. The flow cell stack of claim 1, wherein rectangular grooves are respectively formed above and below the electrode cavity, the flow channel cover plates are placed in the grooves, a serpentine first-stage shunt flow channel is formed in each groove, a portion of the first-stage shunt flow channel, which is close to one side of the electrode cavity, is communicated with the electrode cavity through a second-stage shunt flow channel, and the second-stage shunt flow channel is formed by uniformly arranging bumps along a horizontal direction.
3. The flow cell stack of claim 2, wherein a shared flow channel is provided at each electrode plate frame at four corners, wherein: the sharing flow channels which are arranged on the opposite angles of the upper left part and the lower right part are respectively communicated with the corresponding first-stage flow distribution flow channels; the runner cover plate is respectively embedded in the grooves above and below the electrode plate frame, glue is smeared in the gap between the outer side of the runner cover plate and the grooves for sealing, and meanwhile, the communication of the sharing channel, the first-stage flow distribution channel and the second-stage flow distribution channel with the electrode cavity is reserved.
4. The flow cell stack of claim 3, wherein the area of the flow channel cover plate is larger than the total area of the first-stage flow distribution channel and the second-stage flow distribution channel, the flow channel cover plate is embedded in the positive-side electrode plate frame or the negative-side electrode plate frame and completely covers the first-stage flow distribution channel and the second-stage flow distribution channel, and the flow channel cover plate and the surface of the positive-side electrode plate frame or the negative-side electrode plate frame form a plane.
5. The flow battery stack of claim 3, wherein the groove is 0.5-3 mm deep, the width of the first stage shunt flow channel is 2-15 mm, and the depth of the first stage shunt flow channel is 0.5-8 mm, the width of the second stage shunt flow channel is 2-15 mm, and the depth of the second stage shunt flow channel is 0.5-8 mm, the thickness of the positive electrode plate frame or the negative electrode plate frame is 3-10 mm, the thickness of the flow channel cover plate is 0.5-3 mm, and the diameter of the shared flow channel is 5-50 mm.
6. The flow cell stack of claim 1, wherein the positive electrode has a dimension that is the same as a dimension of an electrode cavity in the positive electrode-side electrode plate frame, the negative electrode has a dimension that is the same as a dimension of an electrode cavity in the negative electrode-side electrode plate frame, the separator is positioned between the positive electrode and the negative electrode, and the separator has a length and a width that are greater than either the positive electrode or the negative electrode.
7. The flow battery stack according to claim 1, wherein a positive side bipolar plate, a positive side current collector and a positive side end plate are sequentially arranged in front of the basic battery unit, a negative side bipolar plate, a negative side current collector and a negative side end plate are sequentially arranged in back of the basic battery unit, and through holes with the same size are arranged at the same positions on the positive side end plate, the positive side bipolar plate, the basic battery unit, the negative side bipolar plate and the negative side end plate and are sequentially penetrated through by bolts; during assembly, the positive side end plate, the positive side current collector, the positive side bipolar plate, the basic battery unit, the negative side bipolar plate, the negative side current collector and the negative side end plate are sequentially stacked, the bolt penetrates through the through hole, the front exposed part of the bolt is fixedly screwed in cooperation with the positive side nut, the rear exposed part of the bolt is fixedly screwed in cooperation with the negative side nut, and the flow battery stack is formed.
8. The flow cell stack of claim 1, wherein the entire flow cell stack is formed by stacking one or more base cells, and a bipolar plate is disposed between two adjacent base cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020671383.6U CN211829056U (en) | 2020-04-28 | 2020-04-28 | Flow battery stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020671383.6U CN211829056U (en) | 2020-04-28 | 2020-04-28 | Flow battery stack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211829056U true CN211829056U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020671383.6U Active CN211829056U (en) | 2020-04-28 | 2020-04-28 | Flow battery stack |
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| CN (1) | CN211829056U (en) |
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2020
- 2020-04-28 CN CN202020671383.6U patent/CN211829056U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210810 Address after: 400050 building 6, No. 15, Fengsheng Road, Jiulongpo District, Chongqing Patentee after: Chongqing Xinhe Qiyue Technology Co.,Ltd. Address before: 410114 No. 960, Second Section of Wanjiali South Road, Tianxin District, Changsha City, Hunan Province Patentee before: Changsha University of Science & Technology |
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| TR01 | Transfer of patent right |