CN113889641B - Flow battery pile bipolar plate - Google Patents
Flow battery pile bipolar plate Download PDFInfo
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- CN113889641B CN113889641B CN202010627870.7A CN202010627870A CN113889641B CN 113889641 B CN113889641 B CN 113889641B CN 202010627870 A CN202010627870 A CN 202010627870A CN 113889641 B CN113889641 B CN 113889641B
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- 239000003792 electrolyte Substances 0.000 claims abstract description 52
- 210000001624 hip Anatomy 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 9
- 239000013543 active substance Substances 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 229910001456 vanadium ion Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
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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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
-
- 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
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- 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
- H01M8/2455—Grouping of fuel cells, e.g. stacking of fuel cells with liquid, solid or electrolyte-charged reactants
-
- 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 relates to a flow battery, in particular to a bipolar plate suitable for the flow battery, wherein sine wave-shaped or triangular wave-shaped grooves, called boundary diversion grooves, are respectively arranged on the surfaces of flat plates outside an electrode area and close to the left side edge and the right side edge; electrolyte flows in from the inlet side, flows through the electrode area and the boundary flow guiding groove, and flows out from the outlet side. The flow velocity of the electrolyte near the wall surface is increased by additionally arranging the flow guiding structure on the bipolar plate near the wall surface, such as the electrode frame, which is attached to the electrode, so that the update rate of active substances near the wall surface is increased, the uniformity of the distribution of the electrolyte is further improved, the local effect is reduced, the efficiency of a battery or a galvanic pile is improved, and the cost of a system is reduced.
Description
Technical Field
The invention relates to the field of flow batteries, in particular to a flow battery or a galvanic pile bipolar plate.
Background
Along with the adjustment of the energy structure, renewable energy sources such as wind energy, solar energy and the like are used for generating electricity, but the renewable energy sources have the characteristics of discontinuity, instability and the like, are difficult to directly grid-connect, and have high wind and light rejection rate. The electric energy storage technology represented by the flow battery can effectively solve the problem. Flow battery technology is an emerging electrochemical energy storage technology, and is attracting attention because of its advantages of independent design of energy storage capacity and power. In the running process of the flow battery, electrolyte flows in a porous electrode area, when the electrolyte flows through firmware edges such as a flow frame at the edge of the electrode, the electrolyte is influenced by the viscosity effect between the electrolyte and the wall surface, and the flow velocity of the electrolyte in the area is reduced to 0. The novel structure of the trapezoid galvanic pile is proposed in China patent (patent application number: 201410495737.5), and can effectively improve the uniformity of electrolyte, but the concentration uniformity of active substances in an electrode can still be influenced by a viscous boundary layer of a firmware accessory, so that obvious local effects are caused, the overall performance of the galvanic pile (or the galvanic pile) is reduced, the service life of the galvanic pile is shortened, the system cost is increased, and the large-scale application of the flow battery is not facilitated.
Disclosure of Invention
Aiming at the problem of local effect caused by the reduction of the flow rate of electrolyte near the wall surface where the electrode frame and other firmware are attached to the electrode in the flow battery, the novel flow battery or electric pile bipolar plate structure is provided, the structure is simple, the processing is convenient, the flow rate of the electrolyte near the wall surface is increased by additionally arranging a flow guiding structure on the bipolar plate near the wall surface where the electrode frame and other firmware are attached to the electrode, so that the update rate of active substances near the wall surface is increased, the distribution uniformity of the electrolyte is further improved, the local effect is reduced, the battery or electric pile efficiency is improved, and the system cost is reduced.
In order to achieve the above purpose, the specific technical scheme provided by the invention is as follows:
A bipolar plate suitable for a flow battery stack, characterized by: the bipolar plate is of a trapezoid flat plate structure, and a trapezoid area for contacting with an electrode is formed in the middle of one side surface or two side surfaces of the flat plate and is called an electrode area; electrolyte flows in from the lower bottom side of the trapezoid electrode area, flows out from the upper bottom side of the trapezoid after flowing in from the electrode area, wherein the lower bottom side of the trapezoid is called an inlet side, the upper bottom side of the trapezoid is called an outlet side, and two waists of the trapezoid are called left and right sides; sinusoidal wave-shaped or triangular wave-shaped grooves, called boundary diversion grooves, are respectively arranged on the surfaces of the flat plates outside the electrode area and close to the left side edge and the right side edge; electrolyte flows in from the inlet side, flows through the electrode area and the boundary flow guiding groove, and flows out from the outlet side.
The design standard of the battery or the electric pile is as follows: the bipolar plate is of an isosceles trapezoid flat plate structure, and the electrode area is an isosceles trapezoid area; the sine wave or triangle wave groove means that the left and right side lines of the cross section of the groove parallel to the surface of the plate body are sine lines or triangle waves. The boundary flow guiding grooves are arranged along the side edges of the two waists of the trapezoid and are respectively called a left boundary flow guiding groove and a right boundary flow guiding groove; when the left boundary flow guiding groove and the right boundary flow guiding groove are in sine wave shapes, the positions of the sine wave curves, which are close to each wave crest (or wave trough) of the electrode area, are respectively communicated with the electrode area; or when the left boundary flow guiding groove and the right boundary flow guiding groove are triangular wave types, the positions of the triangular wave close to each wave crest (or wave trough, namely the turning point of the fold line) of the electrode area are respectively communicated with the electrode area. The plane of the plate body is a plane A, and the projection of the boundary diversion groove on the plane A is axisymmetric with a perpendicular bisector B of the upper bottom edge and the lower bottom edge of the electrode area; the projection of the left boundary flow guiding groove and the right boundary flow guiding groove on the plane A is as follows: a strip-shaped closed graph D formed by sequentially connecting two parallel sine curves M and two straight line segments (according to straight lines, sine curves M, straight lines and sine curves M) end to end or a strip-shaped closed graph E formed by sequentially connecting two parallel triangular wave curves N (triangular wave folding lines) and two straight line segments (according to straight lines, folding lines, straight lines and folding lines) end to end; the two straight line segments of the strip-shaped closed graph D or the two straight line segments of the strip-shaped closed graph E are overlapped with the side edges where the two waists of the trapezoid are positioned. The parallel sinusoids refer to that on the plane where two sinusoids are located, a tangent line G is formed at any point F on one sinusoid, then a perpendicular line H passing through the tangent line G is formed at the point F, the perpendicular line H and the other sinusoid are intersected at a point J, a tangent line K of the other sinusoid is formed at the point J, the tangent line G and the tangent line K are parallel, and the two sinusoids have no intersection point; the parallel triangular wave curve refers to that for any two adjacent fold line segments L, P (one end point of two fold line segments is intersected) forming one triangular wave curve, two adjacent fold line segments which are closest to a fold line L, P respectively corresponding to the other triangular wave curve are S, T, a straight line where L is located is parallel to a straight line where S is located, a straight line where P is located is parallel to a straight line where T is located, and the two triangular wave curves have no intersection point. The left boundary flow guiding groove and the right boundary flow guiding groove which are perpendicular to the surface of the plate body are symmetrical structures with a plane which passes through the geometric center of the inlet side edge and is perpendicular to the inlet side edge as a symmetrical plane. The bipolar plate was provided with 4 through holes for inflow and outflow of the positive and negative electrolyte, respectively.
Preferably, the width of the left boundary flow guiding groove and the right boundary flow guiding groove is 0.5-50 mm, and the width of the boundary flow guiding groove refers to the distance between the left sinusoidal curve and the right sinusoidal curve or the triangular wave curve of the section of the groove parallel to the surface of the plate body; namely, the width of the left and right boundary diversion grooves refers to the distance between the tangent G and the tangent K or the distance between the straight line where L is located and the straight line where S is located.
Preferably, the depth of the left boundary flow guiding groove and the right boundary flow guiding groove is 0.5-30 mm, and the depth of the boundary flow guiding groove refers to the vertical distance between the plane of the plate body and any point of the bottom of the groove.
Preferably, the diameter of the inflow and outflow opening of the electrolyte is 0.1-250 mm.
The width of the plate body around the upper electrode area of the plate body is 1-600 mm; the thickness of the plate body is 0.1-150 mm.
Preferably, the intersection of the inner corner of the boundary diversion groove and each edge is arc-shaped.
The bipolar plate provided by the invention can be made of graphite and other materials, but is not limited to the materials. The groove structure on the plate body can be formed by mechanical processing and carving, hot pressing and the like, but is not limited to the above.
Compared with the prior art, the bipolar plate structure adopted by the invention can accelerate the flow velocity of electrolyte at the edge of the electrode, relieve local effect, reduce battery polarization and improve the performance of the battery and the pile.
The technical proposal of the invention has the beneficial effects that
The bipolar plate for the flow battery or the galvanic pile is convenient to process and simple in structure, and the updating rate and the distribution uniformity of active substances in the flow battery are improved by additionally arranging the boundary flow guide structure on the wall surface, so that the battery performance is effectively improved. Specifically:
The flow velocity of the fluid is reduced to 0 in a certain range as the fluid flows near the wall surface due to the influence of the viscosity of the fluid, especially the liquid flow itself. Therefore, some local effects occur in this region, such as slow electrolyte renewal rate, insufficient active material supply occurs as the reaction proceeds, and polarization increases, voltage efficiency decreases, and electrolyte utilization decreases, eventually degrading overall battery performance.
By additionally arranging the boundary flow guide structure on the bipolar plate near the joint of the fixing piece such as the liquid flow frame and the electrode, the flow velocity of the electrolyte in the area is increased, so that the update rate of the active substances in the area is accelerated, the concentration of the active substances at the edge of the electrode area is increased, the active substances are distributed more uniformly, the internal polarization of the battery is effectively reduced, and the overall performance of the battery is improved.
Drawings
FIG. 1 is a schematic view of the structure of embodiment 1
FIG. 2 is a schematic diagram of the embodiment 2
FIG. 3 is a schematic structural diagram of comparative example 3
Symbol description:
1-negative electrolyte flow inlet, 2-plate, 3-inlet side, 4-electrode area, 5-boundary flow-guiding groove, 6-positive electrolyte flow inlet, 7-left and right sides, 8-negative electrolyte flow outlet, 9-outlet side, 10-positive electrolyte flow outlet
Detailed Description
Example 1
As shown in fig. 1, a flow battery cell stack bipolar plate. The graphite-pressed bipolar plate comprises a bipolar plate body 2, wherein a negative electrode electrolyte flow inlet 1, a negative electrode electrolyte flow outlet 8, a positive electrode electrolyte flow inlet 6 and a positive electrode electrolyte flow outlet 10 are arranged on the bipolar plate body. Wherein, the negative electrode electrolyte flow inlet 1 and the positive electrode electrolyte flow inlet 6 are positioned at the lower bottom side of the trapezoid of the plate body, and the negative electrode electrolyte flow outlet 8 and the positive electrode electrolyte flow outlet 10 are positioned at the upper bottom side of the trapezoid of the plate body. The middle part of the plate body is provided with an electrode area 4 which is trapezoid, 2 identical triangular wave curve-shaped boundary flow guide grooves 5 are arranged near the left side edge and the right side edge 7 of the trapezoid electrode area, one ends of the 2 grooves are positioned on the left side edge and the right side edge 7 of the electrode area and are attached to the inlet side edge 3, the other ends of the 2 grooves are positioned on the left side edge and the right side edge 7, the two grooves are axisymmetric relative to the central axes of the inlet side edge 3 and the outlet side edge 9, and the central line directions of the two triangular wave curve-shaped grooves are respectively parallel to the nearest left side edge and the right side edge of the triangular wave curve-shaped grooves.
The thickness of the plate body is 12mm; the negative electrode electrolyte flow inlet 1, the negative electrode electrolyte flow outlet 8, the positive electrode electrolyte flow inlet 6 and the positive electrode electrolyte flow outlet 10 are all round, and have the diameter of 12mm; in the trapezoid where the electrode area is located, the inlet side is 400mm long, the outlet side is 210mm long, the left side waist and the right side waist are 300mm long, the depth of the triangular wave curve-shaped boundary flow guiding groove 5 is 10mm, and the width is 10mm. The triangular wave curve boundary flow guiding groove is positioned outside the electrode area, the triangular wave duty ratio is 0.5, the wave amplitude is 3cm, the period is 12cm, and the triangular wave curve boundary flow guiding groove is attached to the left side edge and the right side edge 7 at the trough.
A boundary diversion groove is processed on one surface of the plate body; all the intersection points with corners are in arc transition. The grooves on the bipolar plate are engraved by machining.
Example 2
As shown in fig. 2, a flow stack bipolar plate. The graphite-pressed bipolar plate is formed by pressing graphite and comprises a bipolar plate body 2, wherein a negative electrode electrolyte inlet 1, a negative electrode electrolyte outlet 8, a positive electrode electrolyte inlet 6 and a positive electrode electrolyte outlet 10 are arranged on the bipolar plate body. Wherein, the negative electrode electrolyte flow inlet 1 and the positive electrode electrolyte flow inlet 6 are positioned at the lower bottom side of the trapezoid of the plate body, and the negative electrode electrolyte flow outlet 8 and the positive electrode electrolyte flow outlet 10 are positioned at the upper bottom side of the trapezoid of the plate body. The middle part of the plate body is provided with an electrode area 4 which is trapezoid, 2 identical sine wave curve boundary flow guide grooves 5 are arranged near the left side edge and the right side edge 7 of the trapezoid electrode area, one ends of the 2 grooves are positioned on the left side edge and the right side edge 7 of the electrode area and are attached to the inlet side edge 3, the other ends of the 2 grooves are positioned on the left side edge and the right side edge 7 and are attached to the outlet side edge 9, the two grooves are axisymmetric relative to the central axes of the inlet side edge 3 and the outlet side edge 9, and the central line directions of the two sine wave curve grooves are respectively parallel to the nearest left side edge and the right side edge.
The thickness of the plate body is 5mm; the negative electrode electrolyte flow inlet 1, the negative electrode electrolyte flow outlet 8, the positive electrode electrolyte flow inlet 6 and the positive electrode electrolyte flow outlet 10 are all round, and have the diameter of 8mm; in the trapezoid where the electrode area is located, the inlet side is 200mm long, the outlet side is 140mm long, and the two waists are 180mm long. The depth of the sine wave boundary diversion groove 5 is 3mm, and the width is 3mm. The sine wave boundary diversion grooves are positioned outside the electrode area, the shape of the sine wave boundary diversion grooves meets the function y=sinx, the wave amplitude is 2cm, the period is 6cm, and all wave crests or all wave troughs are attached to the left side edge and the right side edge 7.
A boundary diversion groove is processed on one surface of the plate body; all the intersection points with corners are in arc transition. The grooves on the bipolar plate are engraved by machining.
Comparative example 3
The comparative example used a flat plate bipolar plate without boundary flow grooves as shown in fig. 3.
Taking an all-vanadium redox flow battery as an example, a commercial software package COMSOL Multiphysics @ is utilized to perform simulation calculation, and a mathematical model used for simulation mainly comprises:
Momentum conservation and continuity equation:
Wherein, And P represents the velocity vector and pressure, respectively, mu and mu * represent the intrinsic viscosity and the effective viscosity of the electrolyte, respectively, and K represents the permeability of the porous medium (porous electrode), as determined by the Carman-Kozeny equation.
Conservation of materials equation:
Wherein c i is the concentration of material i, S i is the source term in the conservation equation of material i, Is the effective diffusion coefficient in the porous electrode region.
Boundary conditions and initial conditions:
Wherein the method comprises the steps of For normal vector, the inlet pressure P in is set to 12kPa, and the outlet pressure P out is set to 0Pa.
In the model, the concentration of inlet vanadium ions is correlated with the charge-discharge state (SoC) to eliminate the effect of reaction time. The diffusion flux of all materials at the outlet was set to 0 based on the assumption of a sufficiently developed flow. The wall boundary was set to 0 flux. The specific expression is:
representing various ion inlet concentrations, i=2, 3,4,5 representing vanadium ions of the corresponding valence state, And (3) withThe initial concentration of vanadium ions in the positive and negative electrodes, respectively, was set to 1000mol m -3 in this model. The relative error factor for model convergence is 1 x 10 -6.
The results of the simulation calculations for examples 1,2 and comparative example 3 at a current density of 100mA cm -2 for 50% SoC are shown in the following table:
Therefore, the adoption of the bipolar plate structure can obviously improve the uniformity of the distribution of the reactive substances, reduce the polarization, reduce the local effect, improve the power density and reduce the cost.
Claims (7)
1. A bipolar plate suitable for a flow battery stack, characterized by: the bipolar plate is of a trapezoid flat plate structure, and a trapezoid area used for being in contact with an electrode is formed in the middle of one side surface or two side surfaces of the flat plate and is called an electrode area; electrolyte flows in from the lower bottom side of the trapezoid electrode area, flows out from the upper bottom side of the trapezoid after flowing in from the electrode area, wherein the lower bottom side of the trapezoid is called an inlet side, the upper bottom side of the trapezoid after flowing out is called an outlet side, and two waists of the trapezoid are called left and right sides; sinusoidal wave-shaped or triangular wave-shaped grooves, called boundary diversion grooves, are respectively arranged on the surfaces of the flat plates outside the electrode area and close to the left side edge and the right side edge; electrolyte flows in from the inlet side edge, flows out from the outlet side edge after flowing through the electrode area and the boundary flow guiding groove, and the sine wave-shaped or triangular wave-shaped groove means that the left and right side lines of the cross section of the groove parallel to the surface of the plate body are sine lines or triangular waves.
2. The bipolar plate of claim 1, wherein:
the bipolar plate is of an isosceles trapezoid flat-plate structure, and the electrode area is an isosceles trapezoid area.
3. The bipolar plate of claim 1, wherein:
the boundary flow guiding grooves are arranged along the side edges of the two waists of the trapezoid and are respectively called a left boundary flow guiding groove and a right boundary flow guiding groove;
when the left boundary flow guiding groove and the right boundary flow guiding groove are in sine wave shapes, each crest (or trough) of the sine wave curve, which is close to the electrode area, is respectively communicated with the electrode area;
Or when the left boundary flow guiding groove and the right boundary flow guiding groove are triangular wave types, the positions of the triangular wave close to each wave crest (or wave trough, namely turning points of fold lines) of the electrode area are respectively communicated with the electrode area.
4. The bipolar plate of claim 1, wherein:
The left boundary flow guiding groove and the right boundary flow guiding groove which are perpendicular to the surface of the plate body are symmetrical structures with a plane which passes through the geometric center of the inlet side edge and is perpendicular to the inlet side edge as a symmetrical plane.
5. A bipolar plate as in any one of claims 1-4, wherein:
The depth of the left and right boundary diversion grooves is 0.5-30 mm, the depth of the boundary diversion groove refers to the vertical distance between the plane of the plate body and any point at the bottom of the groove.
6. The bipolar plate of claim 1, wherein: the bipolar plate was provided with 4 through holes for inflow and outflow of the positive and negative electrolytes, respectively.
7. Use of a bipolar plate according to any of claims 1-6 in a flow battery or stack.
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| CN113889641B true CN113889641B (en) | 2024-08-23 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203367426U (en) * | 2013-08-13 | 2013-12-25 | 湖南省银峰新能源有限公司 | Flow frame structure of flow battery and electric pile comprising flow frame structure |
| CN209104272U (en) * | 2018-11-28 | 2019-07-12 | 中国科学院大连化学物理研究所 | A kind of bipolar plates suitable for trapezoidal liquid flow battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210110932U (en) * | 2019-08-28 | 2020-02-21 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for trapezoidal flow battery or electric pile |
| CN210136963U (en) * | 2019-08-28 | 2020-03-10 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for rectangular flow battery or electric pile |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203367426U (en) * | 2013-08-13 | 2013-12-25 | 湖南省银峰新能源有限公司 | Flow frame structure of flow battery and electric pile comprising flow frame structure |
| CN209104272U (en) * | 2018-11-28 | 2019-07-12 | 中国科学院大连化学物理研究所 | A kind of bipolar plates suitable for trapezoidal liquid flow battery |
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