CN105047945A - Electrode module for flow battery, preparation method of electrode module and battery stack containing electrode module - Google Patents
Electrode module for flow battery, preparation method of electrode module and battery stack containing electrode module Download PDFInfo
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- CN105047945A CN105047945A CN201510317774.1A CN201510317774A CN105047945A CN 105047945 A CN105047945 A CN 105047945A CN 201510317774 A CN201510317774 A CN 201510317774A CN 105047945 A CN105047945 A CN 105047945A
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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
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
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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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Abstract
The invention discloses an electrode module for a flow battery, a preparation method of the electrode module and a battery stack containing the electrode module. The electrode module comprises a positive flow frame, a positive porous electrode, an electrolyte partition plate, a negative flow frame and a negative porous electrode, wherein the positive flow frame, the positive porous electrode, the electrolyte partition plate, the negative flow frame and the negative porous electrode are integrated. With the adoption of the technical scheme disclosed by the invention and the integrated design of the positive flow frame, the positive porous electrode, the electrolyte partition plate, the negative flow frame and the negative porous electrode, contact resistance inside the flow battery is reduced, the porous electrodes are prevented from being excessively compressed, the sealing part of the battery pile is reduced, and the energy efficiency of a flow battery system and the sealing reliability of the battery pile are improved.
Description
Technical field
The present invention relates to flow battery technology field, in particular to a kind of electrode assemblie for flow battery, its preparation method and the battery pile comprising it.
Background technology
Flow battery is a class model electrochemical energy storage system, compared to other energy storage technologies, the advantages such as flow battery has that power is large, capacity is large, energy conversion efficiency is high, long service life, fail safe are high, environmental protection, are having broad application prospects with the field such as photovoltaic generation and supporting large-scale energy storage system, intelligent grid peak regulation, communication base station and the distributed power source of wind power generation.
As shown in Figure 1, wherein 10 ' is bipolar plates to existing flow battery pile structure, and 20 ' is positive pole liquid flow frame, and 30 ' is positive pole porous electrode, and 40 ' is amberplex, and 50 ' is negative pole liquid flow frame, and 60 ' is negative pole porous electrode.Wherein positive pole porous electrode 30 ' is nested in the middle hollow out position of positive pole liquid flow frame 20 ', and negative pole porous electrode 60 ' is nested in the middle hollow out position of negative pole liquid flow frame 50 ', and each parts constantly repeat to stack together by order shown in figure.Wherein, porous electrode (30 ' and 60 ') is generally compressible carbon felt or graphite felt, its thickness is greater than the thickness of liquid flow frame (20 ' and 50 '), be depressed into by bipolar plates 10 ' and flushed with liquid flow frame (20 ' and 50 ') thickness, thus form electricity with bipolar plates 30 ' and contact.Usually, in order to form good electricity contact, the compression ratio of carbon felt is generally more than 20%.But compression can reduce carbon felt interior porosity, cause electrolyte stream dynamic resistance to increase, systems pumps consume is lost and is greatly increased; On the other hand, in existing battery structure, sealed by sealing ring or gasket seal between bipolar plates and liquid flow frame, greatly add the leakage risk of battery pile, be also unfavorable for that the assembling of battery pile and cost thereof reduce simultaneously.
Summary of the invention
The present invention aims to provide a kind of electrode assemblie for flow battery, its preparation method and comprises its battery pile, improves energy efficiency and the battery pile sealing reliability of flow battery system.
To achieve these goals, according to an aspect of the present invention, a kind of electrode assemblie for flow battery is provided.This electrode assemblie comprises positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, the integration of positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode.
Further, positive pole porous electrode, electrolyte dividing plate and negative pole porous electrode form first component together with the methods combining of bonding, hot pressing or resin-dipping, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole liquid flow frame, first component and negative pole liquid flow frame snap together, and positive pole liquid flow frame and negative pole liquid flow frame are by together with the methods combining of bonding, hot pressing or laser welding.
Further, positive pole liquid flow frame, electrolyte dividing plate form flow frame component with negative pole liquid flow frame together with the methods combining of bonding, hot pressing, laser welding, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole porous electrode is bonded in the first cavity of positive pole liquid flow frame by method that is bonding or hot pressing, and negative pole porous electrode is bonded in the second cavity of negative pole liquid flow frame by method that is bonding or hot pressing.
Further, positive pole liquid flow frame, electrolyte dividing plate and negative pole liquid flow frame form the flow frame component of integration by the method that injection moulding or 3D print, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole porous electrode is bonded in the first cavity of positive pole liquid flow frame by method that is bonding or hot pressing, and negative pole porous electrode is bonded in the second cavity of negative pole liquid flow frame by method that is bonding or hot pressing.
Further, positive pole liquid flow frame is identical with the structure of negative pole liquid flow frame.
Further, the material of electrolyte dividing plate is pure resin or contains Packed resin, and pure resin comprises polyvinyl chloride, polyethylene, polypropylene, fluororesin or epoxy resin; The material of filler comprises carbon felt, graphite felt, carbon black, carbon fiber, graphite, carbon nano-tube, imvite or metal powder; The material of porous electrode comprises graphite felt, carbon felt, porous, electrically conductive macromolecular material and porous corrosion-resistant metal materials.
According to a further aspect in the invention, a kind of battery pile is provided.This battery pile comprises any one electrode assemblie above-mentioned.
According to a further aspect in the invention, a kind of preparation method of above-mentioned electrode assemblie is provided.This preparation method comprises and prepares positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, then positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode is carried out integration and obtains electrode assemblie.
Further, integration comprises the following steps: S1, adopts the method for bonding, hot pressing or resin-dipping that positive pole porous electrode, electrolyte dividing plate and negative pole porous electrode are combined together to form first component; S2, snaps together positive pole liquid flow frame, first component and negative pole liquid flow frame, adopts the method for bonding, hot pressing or laser welding positive pole liquid flow frame and negative pole liquid flow frame to be combined and obtains electrode assemblie.
Further, comprise the following steps: S1, adopt the method for bonding, hot pressing or laser welding that positive pole liquid flow frame, electrolyte dividing plate and negative pole liquid flow frame are combined together to form flow frame component; S2, adopt method that is bonding or hot pressing to be bonded in by positive pole porous electrode on positive pole liquid flow frame to be used for embedding in the first cavity of positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by negative pole porous electrode on negative pole liquid flow frame and be used for embedding in the second cavity of negative pole porous electrode.
Further, comprise the following steps: S1, adopt the method for injection moulding or 3D printing by the flow frame component of positive pole liquid flow frame, electrolyte dividing plate and negative electrode solution stream shaped as frame integralization; S2, adopt method that is bonding or hot pressing to be bonded in by positive pole porous electrode on positive pole liquid flow frame to be used for embedding in the first cavity of positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by negative pole porous electrode on negative pole liquid flow frame and be used for embedding in the second cavity of negative pole porous electrode.
Apply technical scheme of the present invention, by the integrated design of positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame, negative pole porous electrode, reduce the contact resistance of flow battery inside, avoid the excess compression of porous electrode, decrease the sealing position of battery pile, improve energy efficiency and the battery pile sealing reliability of flow battery system.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of liquid stream battery stack in prior art; And
Fig. 2 A shows the right TV structure schematic diagram of first component according to an embodiment of the invention;
Fig. 2 B shows the perspective view according to Fig. 2 A;
Fig. 3 A shows the main TV structure schematic diagram of the positive pole liquid flow frame according to an embodiment of the invention not with branch flow channel;
Fig. 3 B shows the perspective view according to Fig. 3 A;
Fig. 4 A shows the main TV structure schematic diagram of the positive pole liquid flow frame according to an embodiment of the invention with branch flow channel;
Fig. 4 B shows the perspective view according to Fig. 4 A;
Fig. 5 shows assembling sequence and the structural representation of the electrode assemblie according to an embodiment of the invention not with branch flow channel;
Fig. 6 shows assembling sequence and the structural representation of the electrode assemblie according to an embodiment of the invention with branch flow channel;
Fig. 7 shows assembling sequence and the structural representation of the flow frame component according to an embodiment of the invention not with branch flow channel;
Fig. 8 shows assembling sequence and the structural representation of the flow frame component according to an embodiment of the invention with branch flow channel;
Fig. 9 A shows the main TV structure schematic diagram of the flow frame component according to an embodiment of the invention not with branch flow channel;
Fig. 9 B shows the perspective view according to Fig. 9 A;
Figure 10 A shows the main TV structure schematic diagram of the flow frame component according to an embodiment of the invention with branch flow channel;
Figure 10 B shows the perspective view according to Figure 10 A;
Figure 11 shows assembling sequence according to the electrode assemblie not with branch flow channel of further embodiment of this invention and structural representation;
Figure 12 shows assembling sequence and the structural representation of the electrode assemblie of the band branch flow channel according to further embodiment of this invention;
Figure 13 shows assembling sequence and the structural representation of the electrode assemblie not with branch flow channel according to yet another embodiment of the invention; And
Figure 14 shows assembling sequence and the structural representation of the electrode assemblie of band branch flow channel according to yet another embodiment of the invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
According to a kind of typical execution mode of the present invention, provide a kind of electrode assemblie for flow battery.This electrode assemblie comprises positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, the integration of positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode.
Apply technical scheme of the present invention, by the integrated design of positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame, negative pole porous electrode, reduce the contact resistance of flow battery inside, avoid the excess compression of porous electrode, decrease the sealing position of battery pile, improve energy efficiency and the battery pile sealing reliability of flow battery system.
According to a kind of typical execution mode of the present invention, positive pole porous electrode, electrolyte dividing plate and negative pole porous electrode form first component together with the methods combining of bonding, hot pressing or resin-dipping, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole liquid flow frame, first component and negative pole liquid flow frame snap together, and positive pole liquid flow frame and negative pole liquid flow frame are by together with the methods combining of bonding, hot pressing or laser welding.The combination of positive pole porous electrode, electrolyte dividing plate and negative pole porous electrode is exemplary, also can be combined by other mode of this area.
According to a kind of typical execution mode of the present invention, positive pole liquid flow frame, electrolyte dividing plate form flow frame component with negative pole liquid flow frame together with the methods combining of bonding, hot pressing, laser welding, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole porous electrode is bonded in the first cavity of positive pole liquid flow frame by method that is bonding or hot pressing, and negative pole porous electrode is bonded in the second cavity of negative pole liquid flow frame by method that is bonding or hot pressing.
According to a kind of typical execution mode of the present invention, positive pole liquid flow frame, electrolyte dividing plate and negative pole liquid flow frame form the flow frame component of integration by the method that injection moulding or 3D print, positive pole liquid flow frame is provided with the first cavity for embedding positive pole porous electrode, negative pole liquid flow frame is provided with the second cavity for embedding negative pole porous electrode, positive pole porous electrode is bonded in the first cavity of positive pole liquid flow frame by method that is bonding or hot pressing, and negative pole porous electrode is bonded in the second cavity of negative pole liquid flow frame by method that is bonding or hot pressing.
According to a kind of typical execution mode of the present invention, positive pole liquid flow frame is identical with the structure of negative pole liquid flow frame.
According to a kind of typical execution mode of the present invention, positive pole liquid flow frame and negative pole liquid flow frame are rectangle, the diagonal positions being in rectangle is formed with anode electrolyte feed liquor main pipeline and anode electrolyte fluid main pipeline between positive pole liquid flow frame and negative pole liquid flow frame, another diagonal positions being in rectangle is formed with electrolyte liquid feed liquor main pipeline and electrolyte liquid fluid main pipeline between positive pole liquid flow frame and negative pole liquid flow frame, anode electrolyte feed liquor main pipeline, anode electrolyte fluid main pipeline, electrolyte liquid feed liquor main pipeline is connected with the electrolyte distribution on negative pole liquid flow frame respectively at being formed in positive pole liquid flow frame with electrolyte liquid fluid main pipeline.In this kind of structure, after electrolyte enters single battery branch flow channel, be evenly distributed to single battery porous electrode by electrolyte distribution inner.
According to a kind of typical execution mode of the present invention, anode electrolyte feed liquor main pipeline, anode electrolyte fluid main pipeline, electrolyte liquid feed liquor main pipeline are connected by branch flow channel with between electrolyte distribution with electrolyte liquid fluid main pipeline.
Preferably, branch flow channel is serpentine flow path.Increase branch resistance by serpentine flow path design, thus reduce battery pile by-pass current, and then improve the current efficiency of battery pile.
In the present invention, the effect that electrolyte dividing plate plays is conduction electron and isolated both positive and negative polarity electrolyte.According to a kind of typical execution mode of the present invention, the material of electrolyte dividing plate is pure resin or contains Packed resin, and pure resin comprises polyvinyl chloride, polyethylene, polypropylene, fluororesin or epoxy resin; The material of filler comprises carbon felt, graphite felt, carbon black, carbon fiber, graphite, carbon nano-tube, imvite or metal powder; The material of porous electrode comprises graphite felt, carbon felt, porous, electrically conductive macromolecular material and porous corrosion-resistant metal materials.Above-mentioned filler and porous electrode material are conductive material, thus ensure that the conductivity of electrolyte dividing plate.
According to a kind of typical execution mode of the present invention, provide a kind of battery pile, this battery pile comprises any one electrode assemblie above-mentioned.
According to a kind of typical execution mode of the present invention, provide a kind of preparation method of above-mentioned electrode assemblie.This preparation method comprises and prepares positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, then positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode is carried out integration and obtains electrode assemblie.
According to a kind of typical execution mode of the present invention, integration comprises the following steps: S1, adopts the method for bonding, hot pressing or resin-dipping that positive pole porous electrode, electrolyte dividing plate and negative pole porous electrode are combined together to form first component; S2, snaps together positive pole liquid flow frame, first component and negative pole liquid flow frame, adopts the method for bonding, hot pressing or laser welding positive pole liquid flow frame and negative pole liquid flow frame to be combined and obtains electrode assemblie.
According to a kind of typical execution mode of the present invention, comprise the following steps: S1, adopt the method for bonding, hot pressing or laser welding that positive pole liquid flow frame, electrolyte dividing plate and negative pole liquid flow frame are combined together to form flow frame component; S2, adopt method that is bonding or hot pressing to be bonded in by positive pole porous electrode on positive pole liquid flow frame to be used for embedding in the first cavity of positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by negative pole porous electrode on negative pole liquid flow frame and be used for embedding in the second cavity of negative pole porous electrode.
According to a kind of typical execution mode of the present invention, comprise the following steps: S1, adopt the method for injection moulding or 3D printing by the flow frame component of positive pole liquid flow frame, electrolyte dividing plate and negative electrode solution stream shaped as frame integralization; S2, adopt method that is bonding or hot pressing to be bonded in by positive pole porous electrode on positive pole liquid flow frame to be used for embedding in the first cavity of positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by negative pole porous electrode on negative pole liquid flow frame and be used for embedding in the second cavity of negative pole porous electrode.
Beneficial effect of the present invention is further illustrated below in conjunction with embodiment.
In the present invention, the integration of electrode assemblie mainly comprises two large class assembling modes, describes in detail below by the embodiment in scheme one and scheme two.
Scheme one: the program first positive pole porous electrode, negative pole porous electrode and liquid flow frame dividing plate is carried out integratedly forming first component, then carry out integrated by positive pole liquid flow frame, negative pole liquid flow frame with first component, finally obtains unitized electrode assemblies.
Embodiment as shown in Figure 2 A and 2B, first component 001 is processed by the method such as bonding, hot pressing, resin-dipping by positive pole porous electrode 101, negative pole porous electrode 102 and electrolyte dividing plate 103.Wherein, electrolyte separator material is polyvinyl chloride, and porous electrode material is graphite felt.This embodiment first positive pole porous electrode 101, electrolyte dividing plate 103 and negative pole porous electrode 102 is carried out integratedly forming first component 001, again positive pole liquid flow frame, negative pole liquid flow frame are carried out integrated with first component 001, finally obtain unitized electrode assemblies.
Embodiment as shown in figs.3 a and 3b, positive pole liquid flow frame 002 not with branch flow channel, wherein, the pipeline being in diagonal positions is anode electrolyte feed liquor main pipeline 201 and anode electrolyte fluid main pipeline 202, and the pipeline be positioned on another diagonal is electrolyte liquid feed liquor main pipeline 203 and electrolyte liquid fluid main pipeline 204.Electrolyte distribution 205 and anode electrolyte feed liquor main pipeline 201, in an embodiment of the present invention, liquid flow frame is centrosymmetric design, electrolyte distribution respectively has one at electrolyte feed liquor place and electrolyte fluid place, wherein, the electrolyte distribution at electrolyte feed liquor place plays the effect of uniform distribution electrolyte, the electrolyte distribution at electrolyte fluid place plays the effect that uniform collection flows through the electrolyte of porous electrode, liquid in-out place all needs to arrange electrolyte distribution, thus ensures that electrolyte evenly flows through porous electrode.The first middle cavity cavity 206 is the region embedding positive pole porous electrode.Negative pole liquid flow frame (not shown) not with branch flow channel, with not to be with branch flow channel positive pole liquid flow frame 002 to construct identical, only need overturn rear staggered relatively.
Embodiment as illustrated in figures 4 a and 4b, with the positive pole liquid flow frame 005 of branch flow channel, wherein, the pipeline being in diagonal positions is anode electrolyte feed liquor main pipeline 501 and anode electrolyte fluid main pipeline 502, and be positioned at another diagonal is electrolyte liquid feed liquor main pipeline 503 and electrolyte liquid fluid main pipeline 504.Branch flow channel 505 is connected with electrolyte distribution 506, and the first middle cavity 507 is the region embedding positive pole porous electrode.Negative pole liquid flow frame (not shown) with branch flow channel constructs identical with the positive pole liquid flow frame 005 of band branch flow channel, only need overturn rear staggered relatively.Be a kind of runner design it is noted that given here, other runner design is also contained in thinking of the present invention.
Embodiment as shown in Figure 5, for preparation and the structural representation of the unitized electrode assemblies 004 not with branch flow channel design, cooperatively interacted by first component 001, the positive pole liquid flow frame 002 not with branch flow channel and the negative pole liquid flow frame 003 not with branch flow channel, by the technology such as bonding, hot pressing, laser welding by the opposed area bonding beyond positive porous electrode, negative pole porous electrode, form the unitized electrode assemblies 004 not with branch flow channel.
Embodiment as shown in Figure 6, the preparation of the unitized electrode assemblies 007 with branch flow channel design and structural representation, cooperatively interacted by the positive pole liquid flow frame 005 of first component 001, band branch flow channel and the negative pole liquid flow frame 006 of band branch flow channel, by the technology such as bonding, hot pressing, laser welding by the opposed area bonding beyond both positive and negative polarity porous electrode, form the unitized electrode assemblies 007 of band branch flow channel.
Scheme 2: the program first positive pole liquid flow frame, negative pole liquid flow frame and electrolyte dividing plate is carried out integratedly forming flow frame component, then carry out integrated by positive pole porous electrode, negative pole porous electrode with flow frame component, finally obtains unitized electrode assemblies.
Wherein, the preparation of flow frame component has two kinds of approach, one is by positive pole liquid flow frame, electrolyte dividing plate and negative pole liquid flow frame are by bonding, hot pressing, the technology bondings such as laser welding, Fig. 7 and Fig. 8 sets forth the flow frame component 010 of the flow frame component 009 not with branch flow channel and the band branch flow channel obtained by this approach, wherein, electrolyte dividing plate 008 material is pure resin or contains Packed resin, resin types includes but are not limited to polyvinyl chloride, polyethylene, polypropylene, fluororesin, epoxy resin etc., filler comprises and is not limited only to carbon felt, graphite felt, carbon black, carbon fiber, graphite, carbon nano-tube, imvite, metal powder etc.Another kind of approach directly prepares integrated flow frame component by technology such as injection mo(u)lding, 3D printings, and Fig. 9 A, Fig. 9 B and Figure 10 A, Figure 10 B sets forth the one-body molded flow frame component 012 of the one-body molded flow frame component 011 not with branch flow channel and the band branch flow channel obtained by this approach.
In scheme 2, the preparation of unitized electrode assemblies is cooperatively interacted at positive pole porous electrode 002, negative pole porous electrode 003 and above-mentioned obtained flow frame component (009,010,011 or 012), by methods such as bonding, hot pressing, both positive and negative polarity porous electrode is bonded in the electrolyte dividing plate both sides of flow frame component, obtained unitized electrode assemblies.Figure 11, Figure 12, Figure 13, Figure 14 respectively illustrate and bond obtained unitized electrode assemblies process schematic by flow frame component (009,010,011 or 012) and both positive and negative polarity porous electrode.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Unitized electrode assemblies of the present invention, solve in the design of existing flow battery and seal position and cause pile easily to occur the problem that the problem of leakage and the tight compression of porous electrode and bipolar plates cause electrolyte stream dynamic resistance to increase improve the sealing reliability of battery pile and the energy efficiency of flow battery system more.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the electrode assemblie for flow battery, it is characterized in that, comprise positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, the integration of described positive pole liquid flow frame, described positive pole porous electrode, described electrolyte dividing plate, described negative pole liquid flow frame and described negative pole porous electrode.
2. electrode assemblie according to claim 1, it is characterized in that, described positive pole porous electrode, described electrolyte dividing plate and described negative pole porous electrode are by bonding, the methods combining of hot pressing or resin-dipping forms first component together, described positive pole liquid flow frame is provided with the first cavity for embedding described positive pole porous electrode, described negative pole liquid flow frame is provided with the second cavity for embedding described negative pole porous electrode, described positive pole liquid flow frame, described first component and described negative pole liquid flow frame snap together, described positive pole liquid flow frame and described negative pole liquid flow frame are by bonding, the methods combining of hot pressing or laser welding together.
3. electrode assemblie according to claim 1, it is characterized in that, described positive pole liquid flow frame, described electrolyte dividing plate and described negative pole liquid flow frame are by bonding, hot pressing, the methods combining of laser welding forms flow frame component together, described positive pole liquid flow frame is provided with the first cavity for embedding described positive pole porous electrode, described negative pole liquid flow frame is provided with the second cavity for embedding described negative pole porous electrode, described positive pole porous electrode is bonded in the first cavity of described positive pole liquid flow frame by method that is bonding or hot pressing, described negative pole porous electrode is bonded in the second cavity of described negative pole liquid flow frame by method that is bonding or hot pressing.
4. electrode assemblie according to claim 1, it is characterized in that, described positive pole liquid flow frame, described electrolyte dividing plate and described negative pole liquid flow frame form the flow frame component of integration by the method that injection moulding or 3D print, described positive pole liquid flow frame is provided with the first cavity for embedding described positive pole porous electrode, described negative pole liquid flow frame is provided with the second cavity for embedding described negative pole porous electrode, described positive pole porous electrode is bonded in the first cavity of described positive pole liquid flow frame by method that is bonding or hot pressing, described negative pole porous electrode is bonded in the second cavity of described negative pole liquid flow frame by method that is bonding or hot pressing.
5. the electrode assemblie according to any one of claim 2 to 4, is characterized in that, described positive pole liquid flow frame is identical with the structure of described negative pole liquid flow frame.
6. electrode assemblie according to claim 5, is characterized in that, the material of described electrolyte dividing plate is pure resin or contains Packed resin, and described pure resin comprises polyvinyl chloride, polyethylene, polypropylene, fluororesin or epoxy resin; The material of described filler comprises carbon felt, graphite felt, carbon black, carbon fiber, graphite, carbon nano-tube, imvite or metal powder; The material of described porous electrode comprises graphite felt, carbon felt, porous, electrically conductive macromolecular material and porous corrosion-resistant metal materials.
7. a battery pile, is characterized in that, comprises electrode assemblie according to any one of claim 1 to 6.
8. the preparation method of the electrode assemblie according to any one of a claim 1 to 6, it is characterized in that, comprise the following steps: prepare positive pole liquid flow frame, positive pole porous electrode, electrolyte dividing plate, negative pole liquid flow frame and negative pole porous electrode, then described positive pole liquid flow frame, described positive pole porous electrode, described electrolyte dividing plate, described negative pole liquid flow frame and described negative pole porous electrode are carried out integration and obtain described electrode assemblie.
9. preparation method according to claim 8, is characterized in that, described integration comprises the following steps:
S1, adopts the method for bonding, hot pressing or resin-dipping that described positive pole porous electrode, described electrolyte dividing plate and described negative pole porous electrode are combined together to form first component;
S2, snaps together described positive pole liquid flow frame, described first component and described negative pole liquid flow frame, adopts the method for bonding, hot pressing or laser welding described positive pole liquid flow frame and described negative pole liquid flow frame to be combined and obtains described electrode assemblie.
10. preparation method according to claim 8, is characterized in that, comprises the following steps:
S1, adopts the method for bonding, hot pressing or laser welding that described positive pole liquid flow frame, described electrolyte dividing plate and described negative pole liquid flow frame are combined together to form flow frame component;
S2, adopt method that is bonding or hot pressing to be bonded in by described positive pole porous electrode on described positive pole liquid flow frame to be used for embedding in the first cavity of described positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by described negative pole porous electrode on described negative pole liquid flow frame and be used for embedding in the second cavity of described negative pole porous electrode.
11. preparation methods according to claim 8, is characterized in that, comprise the following steps:
S1, adopts the method for injection moulding or 3D printing by the flow frame component of described positive pole liquid flow frame, described electrolyte dividing plate and described negative electrode solution stream shaped as frame integralization;
S2, adopt method that is bonding or hot pressing to be bonded in by described positive pole porous electrode on described positive pole liquid flow frame to be used for embedding in the first cavity of described positive pole porous electrode, adopt method that is bonding or hot pressing to be bonded in by described negative pole porous electrode on described negative pole liquid flow frame and be used for embedding in the second cavity of described negative pole porous electrode.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784918A (en) * | 2017-01-05 | 2017-05-31 | 苏州久润能源科技有限公司 | A kind of flow battery liquid flow frame and its monocell |
| CN116505049A (en) * | 2023-06-27 | 2023-07-28 | 杭州德海艾科能源科技有限公司 | Integrated battery cell for flow battery and manufacturing method thereof |
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