CN116154211A - Flow battery electrode frame and electric pile - Google Patents

Flow battery electrode frame and electric pile Download PDF

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Publication number
CN116154211A
CN116154211A CN202111387129.9A CN202111387129A CN116154211A CN 116154211 A CN116154211 A CN 116154211A CN 202111387129 A CN202111387129 A CN 202111387129A CN 116154211 A CN116154211 A CN 116154211A
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CN
China
Prior art keywords
electrode frame
electrode
end plate
flange
flow battery
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CN202111387129.9A
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Chinese (zh)
Inventor
范永生
刘庆华
缪平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Energy Investment Corp Ltd
National Institute of Clean and Low Carbon Energy
China Longyuan Power Group Corp Ltd
Original Assignee
China Energy Investment Corp Ltd
National Institute of Clean and Low Carbon Energy
China Longyuan Power Group Corp Ltd
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Publication date
Application filed by China Energy Investment Corp Ltd, National Institute of Clean and Low Carbon Energy, China Longyuan Power Group Corp Ltd filed Critical China Energy Investment Corp Ltd
Priority to CN202111387129.9A priority Critical patent/CN116154211A/en
Publication of CN116154211A publication Critical patent/CN116154211A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The invention provides a flow battery electrode frame and a galvanic pile, wherein the electrode frame comprises a flat electrode frame body, and is characterized in that the edge of the front surface of the electrode frame body is provided with a flange which extends outwards, an obtuse included angle is formed between the flange and the electrode frame body, the inner side surface of the flange is provided with a groove, and the side surface corresponding to the thickness of the electrode frame body is provided with a clamping protrusion; when a plurality of electrode frames are stacked, for two adjacent electrode frames, the clamping protrusions on the electrode frames above are clamped into the grooves on the electrode frames below, so that the two adjacent electrode frames are relatively fixed. Based on the technical scheme of the invention, the clamping protrusion is directly connected with the groove on the flange, so that the locking effect is ensured, the original locking structures such as bolts and springs can be replaced, and the galvanic pile structure is simplified.

Description

Flow battery electrode frame and electric pile
Technical Field
The invention relates to the technical field of flow batteries, in particular to a flow battery electrode frame and a galvanic pile.
Background
Flow batteries are an emerging energy storage battery, and electrode frames are an important component of flow batteries for providing electrolyte flow channels, stationary electrodes, bipolar plates, and ion-conducting membranes, and capable of forming a flow battery stack by stacking; meanwhile, the electrode frame also serves as a shell of the electric pile. In order to ensure the tightness of the interior of the stack, welding is required between adjacent electrode frames in the stacked structure.
In the prior art, welding is directly carried out on the planes where adjacent electrode frames are in contact with each other or sealing materials are adopted for connection, and for the electrode frames, only one welding sheet can be stacked in the welding mode, so that the working efficiency is affected. Based on the above, a novel electrode frame structure, namely a galvanic pile, is provided, and the existing welding is replaced by other connection modes, so that the production efficiency is improved.
Disclosure of Invention
To the problem among the above-mentioned prior art, this application has proposed a redox flow battery electrode frame and pile, utilizes the lug boss of joint to be connected with the recess on the flange directly, when guaranteeing locking effect, can replace locking structure such as original bolt, spring, simplifies pile structure.
The invention provides a flow battery electrode frame, which comprises a flat plate-shaped electrode frame body, wherein a flange extending outwards is arranged at the edge of the front surface of the electrode frame body, an obtuse included angle is formed between the flange and the electrode frame body, a groove is formed in the inner side surface of the flange, and a clamping protrusion is arranged on the outer side surface of the electrode frame body;
when a plurality of electrode frames are stacked, for two adjacent electrode frames, the clamping protrusions on the electrode frames above are clamped into the grooves on the electrode frames below, so that the two adjacent electrode frames are relatively fixed.
In one embodiment, the cross-sectional shapes of the clamping protrusion and the groove are wedge-shaped, and the tip of the wedge-shaped is towards the front side of the electrode frame body. Through this embodiment, the cross section shape is wedge joint protruding and recess, can realize through the direct connection that produces deformation between the electrode frame to resume deformation and guarantee the reliability of connection after connecting.
In one embodiment, the flange extends circumferentially continuously along an edge of the electrode frame body; the grooves are of an integral structure extending continuously along the inner side surface of the flange, or the grooves are of a split structure extending discontinuously along the inner side surface of the flange.
In one embodiment, for the groove being an integral structure, the clamping protrusion is an integral structure continuously extending along a side surface corresponding to the thickness of the electrode frame body or a split structure discontinuously extending; the grooves are of split type, and the clamping protrusions are of split type corresponding to the grooves.
In one embodiment, the ribs are manufactured using injection molding, machining, or 3D printing.
In one embodiment, the material of the electrode frame body and the flange is one of polypropylene, polyethylene, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polyvinylidene fluoride or modified polymer thereof.
The invention provides a flow battery pile which consists of a plurality of flow single batteries, wherein each flow single battery comprises the flow battery electrode frame.
In one embodiment, the liquid flow single cell assembly further comprises an end plate, wherein the end plate comprises an upper end plate and a lower end plate, the upper end plate and the lower end plate can be mutually buckled, and a cavity for accommodating and packaging the liquid flow single cells is formed after the upper end plate and the lower end plate are buckled.
In one embodiment, the end parts of the upper end plate and the lower end plate, which can be mutually buckled, are provided with buckling structures, the buckling structures comprise hook-shaped chucks, and clamping grooves are formed in hook-shaped bent parts of the chucks; when the upper end plate is buckled with the lower end plate, the clamping heads of the upper end plate and the lower end plate are respectively clamped into the clamping grooves of the other side.
The above-described features may be combined in various suitable ways or replaced by equivalent features as long as the object of the present invention can be achieved.
Compared with the prior art, the electrode frame and the galvanic pile of the flow battery have the following beneficial effects:
according to the electrode frame and the galvanic pile of the flow battery, the flanges are arranged on the edges of the electrode frame body, and the adjacent electrode frames in the galvanic pile are directly connected with the grooves on the flanges by the clamping protrusions, so that stable connection and locking of the adjacent electrode frames in the galvanic pile can be effectively ensured, the locking effect is ensured, the original locking structures such as bolts and springs can be replaced, and the galvanic pile structure is simplified. The efficiency of the electric pile manufacturing process is improved, and meanwhile, the capacity of adapting to the environment of the electric pile is improved, so that the reliability of the electric pile is improved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 shows a schematic structure of an electrode frame of the present invention;
FIG. 2 shows a partial cross-sectional view of the invention at the flange of the electrode frame;
FIG. 3 is a schematic view showing the structure of a stack of electrode frames according to the present invention;
fig. 4 shows a schematic structural view of an upper end plate of the electric pile of the present invention;
fig. 5 shows a schematic structural view of a lower end plate of the electric pile of the present invention;
fig. 6 shows an outline view of the electric pile of the present invention.
In the drawings, like parts are designated with like reference numerals. The figures are not to scale.
Reference numerals:
the electrode frame comprises a 1-electrode frame body, 11-clamping protrusions, 2-flanges, 21-grooves, 3-end plates, 31-upper end plates, 32-lower end plates, 4-clamping structures, 41-clamping heads and 42-clamping grooves.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The invention provides a flow battery electrode frame, which comprises a flat plate-shaped electrode frame body 1, wherein a flange 2 extending outwards is arranged at the edge of the front surface of the electrode frame body 1, an obtuse included angle is formed between the flange 2 and the electrode frame body 1, a groove 21 is formed in the inner side surface of the flange 2, and a clamping protrusion 11 is arranged on the outer side surface of the electrode frame body 1;
when a plurality of electrode frames are stacked, for two adjacent electrode frames, the clamping protrusions 11 on the upper electrode frame are clamped into the grooves 21 on the lower electrode frame, so that the two adjacent electrode frames are relatively fixed.
Specifically, as shown in the drawings, the electrode frame body 1 in the electrode frame is in a flat plate shape, and has other structures for assembling parts such as a bipolar plate, an ion diaphragm, a positive electrode and a negative electrode of the flow battery, and the like, and the structures are not described herein. The flange 2 in the electrode frame is positioned at the edge of the electrode frame body 1 and extends continuously, so that the whole electrode frame is annular. The flange 2 and the electrode frame body 1 have an obtuse included angle, so the flange 2 is in a state similar to that of the electrode frame body 1 after being bent, as shown in fig. 2 and 3 of the accompanying drawings, the flange 2 is a circle of "flanging" at the edge of the electrode frame body 1.
The plurality of electrode frames are stacked to form a stack of the flow battery, as shown in fig. 3 of the accompanying drawings. For two adjacent electrode frames, in the stacked structure of two stacked electrode frames, the flange 2 of one electrode frame wraps and is buckled on the outer side surface corresponding to the thickness of the electrode frame body 1 of the other electrode frame, as shown in fig. 3 of the accompanying drawings. At this time, the clamping protrusion 11 on the upper electrode frame is clamped into the groove on the inner side surface of the flange 2 on the lower electrode frame, and at this time, the back surface of the upper electrode frame is tightly attached to the front surface of the lower electrode frame, so that the two electrode frames are relatively fixed. The electrode frames are stacked to form the electric pile through the fixing structure, so that the stability of the electric pile structure is guaranteed, and meanwhile, the locking structures such as original bolts, bolts and springs of the electric pile can be omitted.
Preferably, the cross-sectional shapes of the clamping projection 11 and the groove 21 are wedge-shaped, and the tip of the wedge-shape faces the front side of the electrode frame body 1.
Specifically, as shown in fig. 2 and 3 of the accompanying drawings, the clamping protrusion 11 and the groove 21 with wedge-shaped cross sections can directly press the two electrode frames when the two electrode frames are stacked. The wedge-shaped shape forces the flange 2 of the electrode frame to locally deform in the groove 21, so that the clamping protrusion 11 can be smoothly clamped into the groove 21, and after the clamping protrusion 11 is clamped into the groove, the flange 2 is deformed again, so that the clamping protrusion 11 and the groove 21 are stably matched and cannot be separated.
Further, the design of the clamping protrusion 11 and the groove 21 with wedge-shaped cross sections is adopted, and the orientation of the tip determines whether the flange 2 can be correctly deformed to realize the clamping of the clamping protrusion 11 into the corresponding groove 21 during connection, as shown in fig. 3 of the accompanying drawings, the wedge-shaped tip of the clamping protrusion must face to the front side of the electrode frame body 1, namely, the upper side shown in fig. 3 of the accompanying drawings. Of course, according to practical situations, the wedge-shaped tip can be changed to face the opposite side of the electrode frame body 1, i.e. the lower side shown in fig. 3 of the drawings, so that the positions of the clamping protrusion 11 and the groove 21 need to be changed, i.e. the clamping protrusion 11 is disposed on the inner side surface of the flange, and the groove 21 is disposed on the side corresponding to the thickness of the electrode frame body 1.
Preferably, the flange 2 is manufactured by injection moulding, machining or 3D printing.
Specifically, after the electrode frame is integrally formed, the flange is additionally formed on the electrode frame by injection molding, machining or 3D printing, or the flange and the electrode frame are integrally manufactured by injection molding, machining or 3D printing in one-step forming.
In one embodiment, the flange 2 extends continuously circumferentially along the edge of the electrode frame body 1;
the groove 21 is a unitary structure extending continuously along the inner side surface of the flange 2, or the groove 21 is a split structure extending discontinuously along the inner side surface of the flange 2.
Specifically, in practical application, in order to ensure that the opposite sealing performance is maintained after the plurality of electrode frames are stacked, the flanges 2 continuously extend along the periphery of the electrode frame body 1, and further, for two adjacent electrode frames, the adjacent electrode frames have continuous contact surfaces formed by the flanges 2 in the periphery, so that the sealing can be maintained to a certain extent.
The notch 21 may be continuous and complete in shape, or may be a split structure comprising several discontinuous parts, so as to meet different requirements without affecting the connection between two adjacent electrode frames.
In one embodiment, for the groove 21 as an integral structure, the clamping protrusion 11 is an integral structure continuously extending along the side corresponding to the thickness of the electrode frame body 1 or a discrete structure discontinuously extending; for the groove 21 is of a split type structure, the clamping protrusion 11 is of a split type structure corresponding to the groove 21.
Specifically, the engaging protrusion 11 may be designed in a different structure corresponding to a different structure of the recess 21. When the groove 21 is in an integral structure, the clamping protrusion 11 may be an integral structure corresponding to the groove 21 or a split structure. The clamping bulges of the two structures can be clamped into the grooves 21, but the contact surface of one structure after being clamped is large, and the contact surface of the other structure after being clamped is small, so that different requirements can be met. While the corresponding groove 21 is a split structure, the clamping protrusion 11 can only be a split structure corresponding to the groove 21.
In one embodiment, the material of the electrode frame body 1 and the flange 2 is one of polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), acrylonitrile Butadiene Styrene (ABS), polyvinylidene fluoride (PVDF) or a modified polymer thereof.
Specifically, the electrode frame body 1 and the flange 2 may be made of one of the above materials, or may be modified based on the above materials, or may be made of a weldable polymer material formed by compounding a household material with other rigid polymer fibers.
The flow battery pile consists of a plurality of flow single batteries, and the flow single batteries comprise the flow battery electrode frame, so that all technical effects of the flow battery pile are achieved.
Specifically, the flow cell also includes other components including an ion separator, bipolar plate, electrode, and other components assembled on an electrode frame.
The separator allows positive and negative electrode reactions to pass conductive ions, including but not limited to H, to block the passage of other ions and solvents + 、Na + 、K + 、Li + 、Cl - 、OH - And (3) plasma.
The electrode includes a positive electrode and a negative electrode, and a positive electrode reaction and a negative electrode reaction of the battery respectively occur. The positive electrode reaction comprises oxidation-reduction reactions of other pairs such as interconversion of pentavalent vanadium ions and tetravalent vanadium ions, interconversion of ferric ions and ferrous ions, and the like. The negative electrode reaction comprises redox reactions of other pairs such as interconversion of trivalent vanadium ions and tetravalent vanadium ions, interconversion of trivalent chromium ions and divalent chromium ions, and the like.
In one embodiment, the liquid flow cell further comprises an end plate 3, the end plate 3 comprises an upper end plate 31 and a lower end plate 32, the upper end plate 31 and the lower end plate 32 can be mutually buckled, and a cavity for accommodating and packaging a plurality of liquid flow cells is formed after the upper end plate 31 and the lower end plate 32 are buckled.
As shown in fig. 3 to 6 of the drawings, the end plate 3 is actually a housing of a structure in which a plurality of electrode frames are stacked, and includes an upper end plate 31 and a lower end plate 32 that are fastened to each other, and the upper end plate 31 and the lower end plate 32 are used for protecting the electrode frames after fastening and further ensuring the stability of the structure in which a plurality of electrode frames are stacked, so that packaging is achieved through fastening and the reliability of the galvanic pile structure is ensured.
In one embodiment, the end parts of the upper end plate 31 and the lower end plate 32 which can be mutually buckled are provided with buckling structures 4, the buckling structures 4 comprise hook-shaped clamping heads 41, and clamping grooves 42 are formed in hook-shaped bent parts of the clamping heads 41; when the upper end plate 31 and the lower end plate 32 are engaged, the chucks 41 of the two are respectively engaged with the engaging grooves 42 of the other.
Specifically, as shown in fig. 3 of the drawings, the upper end plate 31 and the lower end plate 32 are mutually buckled through the buckling structure 4, and the upper end plate 31 and the buckling structure 4 on the lower end plate 32 are completely identical, except that the directions of the clamping heads 41 are opposite. When in buckling, the upper end plate 31 and the lower end plate 32 are directly pressed, the clamping head 41 is deformed, and then the clamping heads 41 of the upper end plate and the lower end plate are respectively clamped into the clamping grooves 42 of the other side, so that buckling connection is realized.
In the description of the present invention, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "left," "right," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims (9)

1. The electrode frame of the flow battery comprises a flat plate-shaped electrode frame body and is characterized in that a flange extending outwards is arranged at the edge of the front surface of the electrode frame body, an obtuse included angle is formed between the flange and the electrode frame body, a groove is formed in the inner side surface of the flange, and a clamping protrusion is arranged on the outer side surface of the electrode frame body;
when a plurality of electrode frames are stacked, for two adjacent electrode frames, the clamping protrusions on the electrode frames above are clamped into the grooves on the electrode frames below, so that the two adjacent electrode frames are relatively fixed.
2. The flow battery electrode frame of claim 1, wherein the cross-sectional shapes of the clamping protrusions and the grooves are wedge-shaped, and the tips of the wedges face to the front side of the electrode frame body.
3. The flow battery electrode frame of claim 1 or 2, wherein the flange extends circumferentially continuously along an edge of the electrode frame body;
the grooves are of an integral structure extending continuously along the inner side surface of the flange, or the grooves are of a split structure extending discontinuously along the inner side surface of the flange.
4. The flow battery electrode frame of claim 3, wherein for the groove to be of an integral structure, the clamping protrusion is of an integral structure or a discrete structure extending continuously along a side corresponding to the thickness of the electrode frame body;
the grooves are of split type, and the clamping protrusions are of split type corresponding to the grooves.
5. The flow battery electrode frame of claim 1, wherein the flange is manufactured by injection molding, machining, or 3D printing.
6. The flow battery electrode frame of claim 1, wherein the electrode frame body and the flange are made of one of polypropylene, polyethylene, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polyvinylidene fluoride or modified polymer thereof.
7. A flow battery stack consisting of a plurality of flow battery cells, wherein the flow battery cells comprise the flow battery electrode frame of any one of claims 1 to 6.
8. The flow battery stack of claim 7, further comprising an end plate, the end plate comprising an upper end plate and a lower end plate, the upper end plate and the lower end plate being capable of being snapped together to form a cavity that houses and encapsulates the plurality of flow cells.
9. The flow battery stack of claim 8, wherein the ends of the upper end plate and the lower end plate capable of being mutually buckled are provided with buckling structures, the buckling structures comprise hook-shaped clamping heads, and clamping grooves are formed in hook-shaped bent parts of the clamping heads;
when the upper end plate is buckled with the lower end plate, the clamping heads of the upper end plate and the lower end plate are respectively clamped into the clamping grooves of the other side.
CN202111387129.9A 2021-11-22 2021-11-22 Flow battery electrode frame and electric pile Pending CN116154211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111387129.9A CN116154211A (en) 2021-11-22 2021-11-22 Flow battery electrode frame and electric pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111387129.9A CN116154211A (en) 2021-11-22 2021-11-22 Flow battery electrode frame and electric pile

Publications (1)

Publication Number Publication Date
CN116154211A true CN116154211A (en) 2023-05-23

Family

ID=86358743

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111387129.9A Pending CN116154211A (en) 2021-11-22 2021-11-22 Flow battery electrode frame and electric pile

Country Status (1)

Country Link
CN (1) CN116154211A (en)

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