CN108565468A - Insertion slot type afflux structure, measuring system and its measurement method - Google Patents
Insertion slot type afflux structure, measuring system and its measurement method Download PDFInfo
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- CN108565468A CN108565468A CN201810330080.5A CN201810330080A CN108565468A CN 108565468 A CN108565468 A CN 108565468A CN 201810330080 A CN201810330080 A CN 201810330080A CN 108565468 A CN108565468 A CN 108565468A
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- afflux
- insertion slot
- slot type
- knife
- flow battery
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
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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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary 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
- Y02E60/10—Energy storage using batteries
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Open insertion slot type afflux structure,Measuring system and measurement method,Insertion slot type afflux structure includes afflux frame (1),Multiple knife-edge graphite collectors (2) and insulated enclosure gasket (3),Afflux frame (1) side is equipped with the inlet (4) for introducing electrolyte and opposite side equipped with the liquid outlet (5) for electrolyte to be discharged,Afflux frame (1) first surface (6) is carved with adjacent flow path groove (7) and runs through slot (8),Flow path groove (7) one end is connected to inlet (4),The other end is connected to liquid outlet (5),Multiple knife-edge graphite collector (2) blade part (9) arranged superposeds,Shank portion (10) opposed,The blade part (9) of each knife-edge graphite collector (2) is inserted through slot (8) relative to the second surface (11) of first surface (6) from afflux frame (1) and forms runner spine from first surface (6) protrusion,Shank portion (10) is positioned over the groove (12) of insulated enclosure gasket (3).
Description
Technical field
It is especially a kind of for measuring the flow battery electricity with runner the present invention relates to a kind of flow battery technology field
Insertion slot type afflux structure, measuring system and its measurement method of current density distribution.
Background technology
The uniformity of electrode interior current density distribution is to evaluate one of the critical operational parameters of battery performance, electrode interior
The inhomogeneities of current density distribution can not only be such that battery performance reduces, and can also be caused sternly to its cost, service life or even safety
The adverse effect of weight.Electrode interior current density is distributed in spatio-temporal distribution unevenness mainly by battery structure, material, fortune
The influence of the various aspects composite factor such as row parameter.There is substance conversion that is complicated and intercoupling inside flow battery, be transmitted across
Journey obtains the on-line measurement experimental data of reliable key parameter distribution character, can deepen the understanding to correlated process mechanism and
Understanding, the rule for grasping flow battery bulk properties parameter uneven distribution and variation, this is to optimizing flow battery structure design
Important academic significance and application value are all had with flow battery performance is improved.Survey to the internal current density of flow battery
There are mainly two types of methods for amount, and one is several copper current-conducting pieces are placed on progress current density distribution on the outside of graphite current collector plates to survey
Amount, another method are that original graphite current collector plates are divided into several pieces of graphite afflux blocks to carry out current density distribution measuring.By
It cannot be guaranteed that contact situation of the every piece of conductive copper sheet with graphite current collector plates is identical in the first measurement method implementation process,
Therefore the accuracy of measurement result can not ensure.For second of detection method, graphite current collector plates need to be filled out by carving slot segmentation-
It is the sectional type being bonded together to fill a series of complex working processes such as the non-division slot part of megohmite insulant-removal-quarter flow path groove
Collector, when use, also need to be used in combination with copper conductive plate, and the electric current on every piece of collector is conductive by the copper contacted
Plate export measures.This method is in measurement process there is no guarantee that contact feelings of the every piece of graphite current collector plates with conductive copper sheet
Condition is identical, and the accuracy of measurement result can not also ensure, and this method processing is complicated, of high cost, is unsuitable for promoting.Cause
This, both the above method all can not be to there is the current density distribution inside runner flow battery effectively to be measured.
Disclosed above- mentioned information is used only for enhancing the understanding to background of the present invention in the background section, it is thus possible to
Including in not constituting home the prior art known to a person of ordinary skill in the art information.
Invention content
In place of solving above-mentioned the deficiencies in the prior art, a kind of high certainty of measurement of present invention offer, at low cost, implementation
By force, easy to operate to measure the insertion slot type afflux structure for having runner flow battery internal current Density Distribution, measuring system
And its measurement method.
The purpose of the present invention is be achieved by the following technical programs.
One aspect of the present invention, a kind of insertion slot type collection being distributed for measuring the flow battery current density with runner
Flow structure, insertion slot type afflux structure include afflux frame, insert multiple knife-edge graphite collectors on afflux frame and fix knife-edge
The insulated enclosure gasket of graphite collector,
Afflux frame, afflux frame side is equipped with the inlet for introducing electrolyte and opposite side is equipped with for electrolyte to be discharged
Liquid outlet, the first surface of afflux frame is carved with adjacent flow path groove and runs through slot, and described flow path groove one end is connected to inlet, separately
One end is connected to liquid outlet,
Knife-edge graphite collector comprising blade part and shank portion, the two-by-two knife of adjacent knife-edge graphite collector
Body partly overlaps arrangement, shank portion opposed, and the blade part of each knife-edge graphite collector is from afflux frame relative to
The second surface insertion on one surface is described to be run through slot and protrudes to form runner spine from first surface, outer detecting circuit electrical connection
The shank portion,
Insulated enclosure gasket comprising multiple grooves for accommodating shank portion.
Described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed, knife-edge
The blade part length and width dimensions of graphite collector with it is described through slot it is identical, thickness is identical as the thickness of afflux frame.
It is described described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed
First surface is equipped with recessed area comprising flow path groove and through slot, and the electrode material of the recessed area and flow battery is close
Contact.
It is described described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed
Flow path groove is serpentine flow path slot, reversion flow path groove, parallel fluid channels slot, interdigitated flow path groove or bending wave flow path groove.
It is described described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed
Afflux frame by being made up to Rockwell hardness number more than 8 degree of erosion resisting insulation material, such as meet stiffness conditions acrylic glass,
Resin or plastics, insulated enclosure gasket are made of shore hardness of the erosion resisting insulation material between 40HA~90HA, play support
And sealing function, such as meet fluorine offset plate, rubber slab and the silica gel plate of hardness requirement.
It is described described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed
Number, the groove number of knife-edge graphite collector are identical with through slot number.
Described for measuring in the insertion slot type afflux structure that the flow battery current density with runner is distributed, afflux
The size of frame and the size of flow path groove are mutually matched receiving.
Another aspect of the present invention, a kind of measuring system of the flow battery current density distribution with runner, the survey
Amount system includes flow battery and measuring device with runner, and the flow battery includes the insertion slot type afflux structure, the
One surface and electrode material are in close contact, and measuring device includes：
Charge/discharge unit, to the flow battery charge and discharge, shank portion and charge/discharge unit form external detection electricity
Road,
Multiple current sensors, the current sensor measure the electric current of the outer detecting circuit respectively,
Data acquisition unit, acquisition and the current data for recording the current sensor.
In the measuring system, the positive and negative electrode electrode material is positive graphite felt electrode, diaphragm by it is described just,
Cathode graphite felt electrode and cathode graphite felt electrode separate, and the current sensor is Hall current sensor.
According to another aspect of the invention, a kind of measurement method step using the insertion slot type afflux structure includes：
Arrange the insertion slot type afflux structure in first step, in the flow battery with runner, or by the insertion slot type
Afflux structure replaces battery current collecting plate and conductive plate,
In second step, electrolyte is introduced from inlet, flows into flow path groove and is discharged from liquid outlet, each knife-edge graphite collection
It is protruded through slot and from first surface described in second surface insertion of the blade part of fluid from afflux frame relative to first surface
Runner spine is formed,
In third step, charge/discharge unit forms outside the flow battery charge and discharge, shank portion and charge/discharge unit
Portion's detection circuit,
In four steps, multiple current sensors measure the electric current of the outer detecting circuit respectively,
In 5th step, data acquisition unit acquires and records the current data of the current sensor.
The invention has the advantages that：
Knife-edge graphite collector is inserted the sectional type collection that flow passage structure is built in slot in afflux frame by the present invention
Flow structure, when implementation make knife-edge graphite collector directly with the electrode material contacts of flow battery, every knife-edge graphite collector
Shank portion be connected respectively with charge/discharge unit constitute inside battery current density distribution measure loop, the present invention in every piece of knife
The current density of shape graphite collector is equal to the ratio between surveyed electric current and graphite flake collection liquid surface product, and insulated enclosure gasket is being implemented
When need to be placed on knife-edge graphite collector shank portion be used for fix graphite flake collector.Be cut on the insulated enclosure gasket with
The groove that knife-edge graphite collector shank portion size matches, gasket can not only support fixed graphite flow collection sheet, also act as
Sealing and insulating effect.The electrode material of first surface and battery is in close contact to ensure good electric conductivity and leakproofness.Knife
The blade part of type graphite collector is inserted into slot from the another side of afflux frame and forms runner spine, knife-edge graphite afflux
The shank portion of body to be built with the sectional type afflux structure of flow passage structure, and then is realized with stream for connecting external circuit
The flow battery internal current Density Distribution of road structure measures, and inside battery current density distribution is carried out by medium of graphite material
It measures, reduces and measure difficulty, and can be applied in the batteries with aggressive electrolyte such as acid alkalinity.The insertion slot type afflux
Original collector plate and conductive plate in the direct substituting battery of structure save material, reduce flow battery testing cost, replicability
By force.Number is tested in the on-line measurement that reliable key parameter distribution character can be obtained by the flow battery insertion slot type afflux structure
According to, can deepen the understanding and cognition to battery correlated process mechanism, grasp flow battery bulk properties parameter uneven distribution with
The rule of variation, this all has important meaning and application value to the design of optimization flow battery, manufacture and operation.
The measuring device and measurement method of the present invention can accurately measure the distribution of flow battery current density, and operation side
Just, implementation is strong and at low cost.
Above description is only the general introduction of technical solution of the present invention, in order to make the technological means of the present invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be clearer and more comprehensible, below with the present invention specific implementation mode illustrate
Explanation.
Description of the drawings
By reading the detailed description in hereafter preferred embodiment, the present invention various other advantage and benefit
Those of ordinary skill in the art will become clear, Figure of description only for the purpose of illustrating preferred embodiments,
And it is not considered as limitation of the present invention, it should be apparent that, drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings, and throughout the drawings, identical component is presented with like reference characters,
In the accompanying drawings：
Fig. 1 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
The decomposition diagram of slot type afflux structure；
Fig. 2 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
The structural schematic diagram of the knife-edge graphite collector of slot type afflux structure；
Fig. 3 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
The afflux frame schematic cross-section of slot type afflux structure；
Fig. 4 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
The assembling schematic diagram of slot type afflux structure；
Fig. 5 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
Slot type afflux structure is assemblied in the structural schematic diagram of flow battery；
Fig. 6 is the measuring device structural schematic diagram of measuring system according to an embodiment of the invention；
Fig. 7 is the step schematic diagram of measurement method according to an embodiment of the invention；
Fig. 8 is the current density distributing figure measured according to an embodiment of the present invention.
The present invention is further explained below in conjunction with drawings and examples.
Specific implementation mode
Specific embodiments of the present invention are more fully described below with reference to accompanying drawings.Although showing the present invention's in attached drawing
Specific embodiment, it being understood, however, that may be realized in various forms the present invention without should be limited by embodiments set forth here
System.It is to be able to be best understood from the present invention on the contrary, providing these embodiments, and can be complete by the scope of the present invention
Be communicated to those skilled in the art.
It should be noted that having used some vocabulary in specification and claim to censure specific components.Ability
Field technique personnel it would be appreciated that, technical staff may call the same component with different nouns.This specification and right
It is required that not in such a way that the difference of noun is used as and distinguishes component, but differentiation is used as with the difference of component functionally
Criterion."comprising" or " comprising " as mentioned in working as in specification in the whole text and claim are an open language, therefore should be solved
It is interpreted into " including but not limited to ".Specification subsequent descriptions be implement the present invention better embodiment, so it is described description be with
For the purpose of the rule of specification, it is not limited to the scope of the present invention.Protection scope of the present invention is when regarding appended right
It is required that subject to institute's defender.
For ease of the understanding to the embodiment of the present invention, solved below in conjunction with attached drawing is further by taking specific embodiment as an example
Explanation is released, and each attached drawing does not constitute the restriction to the embodiment of the present invention.
In order to better understand, Fig. 1 is according to an embodiment of the invention for measuring the flow battery with runner
The decomposition diagram of the insertion slot type afflux structure of current density distribution, Fig. 2 are according to an embodiment of the invention for measuring
The structural schematic diagram of the knife-edge graphite collector of the insertion slot type afflux structure of flow battery current density distribution with runner；Figure
3 be the insertion slot type afflux knot according to an embodiment of the invention being distributed for measuring the flow battery current density with runner
The afflux frame schematic cross-section of structure；Fig. 4 is according to an embodiment of the invention for measuring the flow battery electricity with runner
The assembling schematic diagram of the insertion slot type afflux structure of current density distribution；As shown in Figs 1-4, it is used to measure the flow battery with runner
Current density distribution insertion slot type afflux structure include afflux frame 1, the multiple knife-edge graphite collectors 2 inserted on afflux frame 1
With the insulated enclosure gasket 3 of fixed knife-edge graphite collector 2.
Afflux frame 1,1 side of afflux frame is equipped with the inlet 4 for introducing electrolyte and opposite side is equipped with for electricity to be discharged
The liquid outlet 5 of liquid is solved, the first surface 6 of afflux frame 1 is carved with adjacent flow path groove 7 and runs through slot 8, and 7 one end of the flow path groove connects
Logical inlet 4, the other end are connected to liquid outlet 5,
Knife-edge graphite collector 2 comprising blade part 9 and shank portion 10, two-by-two adjacent knife-edge graphite collector 2
9 arranged superposed of blade part, 10 opposed of shank portion, the blade part 9 of each knife-edge graphite collector 2 is from afflux frame
1 relative to first surface 6 second surface 11 be inserted into it is described form runner spine through slot 8 and from the protrusion of first surface 6, it is external
Detection circuit is electrically connected the shank portion 10,
Insulated enclosure gasket 3 comprising multiple grooves 12 for accommodating shank portion 10.
The present invention can measure runner flow battery internal current Density Distribution in real time, to inside battery operating condition into
The comprehensive real-time monitoring of row, can accurately measure flow battery internal current Density Distribution situation, using graphite material as medium into
Row inside battery current density distribution measuring reduces and measures difficulty, and it is equal with corrosive electrolytic to can be applied to acid alkalinity
In the battery of matter, the present invention is easy to operate, and stability is high, and replicability is strong.
For a further understanding of the present invention, in one embodiment, insertion slot type afflux structure includes afflux frame 1, knife-edge stone
Ink sheet collector 2 and insulation spacer 3, the afflux frame involved in embodiment uses acrylic glass, but material is not limited to Ya Ke
Power glass；Serpentine flow path slot is carved in the side of afflux frame, but flow passage structure is not limited to serpentine flow path；It is applied complete in embodiment
In vanadium flow battery anode, but it is not limited to be applied in all-vanadium flow battery and anode；Graphite flake collector in the present embodiment
Support pad uses Viton fluorine offset plates, but is not limited to use Viton fluorine offset plates.
In one embodiment, in embodiment serpentine flow path slot and adjacent is carved in the first surface of acrylic afflux frame 1
Insert 8 knife-edge graphite collectors run through slot.The thickness of acrylic afflux frame is 8mm, and serpentine flow path is by 7 U row slot groups
At length 36mm, width 2mm, groove depth 2mm.It is 34mm, width 2mm through slot length.8 knife-edge graphite affluxs
The blade length and width dimensions of body be all mutually 34mm through slot, blade thickness is all mutually 8mm with afflux frame thickness.By knife-edge stone
The blade part of ink sheet collector 2 is inserted into from the second surface of acrylic afflux frame 1 in slot, knife-edge graphite collector
Shank portion is for connecting external circuit, after the blade of graphite collector is inserted into through slot, in the first surface of afflux frame
Form the spine of serpentine flow path.Insulated enclosure gasket 3 is cut according to the handle of a knife size of knife-edge graphite collector, makes knife-edge stone
In the groove of the handle of a knife insertion support pad of black collector 2.
In the preferred embodiment of insertion slot type afflux structure of the present invention, 9 length and width of blade part of knife-edge graphite collector 2
Size with it is described through slot 8 it is identical, thickness is identical as the thickness of afflux frame 1.
In the preferred embodiment of insertion slot type afflux structure of the present invention, the first surface 6, which is equipped with, includes 7 He of flow path groove
Through the recessed area of slot 8 13, the recessed area 13 and the electrode material 14 of flow battery are in close contact.
In the preferred embodiment of insertion slot type afflux structure of the present invention, the flow path groove 7 is serpentine flow path slot, serpentine flow
Road slot includes multiple U-type grooves in the horizontal direction.
In the preferred embodiment of insertion slot type afflux structure of the present invention, the afflux frame 1 is made of acrylic glass, absolutely
Edge gasket seal 3 is made of fluorine offset plate.
In the preferred embodiment of insertion slot type afflux structure of the present invention, the number of the knife-edge graphite collector 2, groove
12 numbers and through 8 numbers of slot it is identical, handle of a knife position is according to number consecutively from top to bottom
In the preferred embodiment of insertion slot type afflux structure of the present invention, the thickness of afflux frame 1 is 8mm, and flow path groove 7 is by more
U row slots composition, the length of 36mm, width 2mm, groove depth 2mm are 34mm, width 2mm through 8 length of slot.
Fig. 6 is the measuring device structural schematic diagram of measuring system according to an embodiment of the invention, as shown, a kind of
The measuring system of flow battery current density distribution with runner includes flow battery and measuring device 16 with runner, institute
The insertion slot type afflux structure that flow battery includes described is stated, first surface 6 and electrode material 14 are in close contact, and measuring device 16 is wrapped
It includes：
Charge/discharge unit 17, to the flow battery charge and discharge, shank portion 10, conductive copper plate 21 and charge/discharge unit
17 form outer detecting circuit,
Multiple current sensors 18, the current sensor 18 measure the electric current of the outer detecting circuit respectively,
Data acquisition unit 19, acquisition and the current data for recording the current sensor 18.
Fig. 5 is according to an embodiment of the invention for measuring inserting for the flow battery current density distribution with runner
Slot type afflux structure is assemblied in the structural schematic diagram of flow battery, the preferred embodiment of insertion slot type afflux structure of the present invention
In, the electrode material 14 is positive graphite felt electrode, and diaphragm 20 is by the positive graphite felt electrode and cathode graphite felt electrode
It separates, 15 side of negative electrode collector plate is equipped with conductive copper plate 21, and the current sensor 18 is Hall current sensor.
In one embodiment, full flow battery insertion slot type afflux structure directly substitutes in all-vanadium flow battery when implementing
The first surface of afflux frame is directly in close contact with the electrode material of flow battery 14 by original anode collection plate and conductive plate,
To ensure good electric conductivity between graphite collector and electrode material.Full electrode of liquid flow cell material involved in the present embodiment
14 use the GFA5 graphite felts of 4cm*3cm, diaphragm 20 to use Nafion117.Negative pole currect collecting plate 15 is the stone for being carved with serpentine flow path
Black collector plate, electric current are collected through conductive copper plate 21.All components are fastened using aluminum end plate through screw bolt and nut.Electrolyte uses
The VOSO of 1.5mol/L4With the H of 2mol/L2SO4Mixed solution, measuring environment temperature be 20 DEG C, electrolyte flow rate 20mL/
Min, charging and discharging currents density are 25mA/cm2Charge and discharge total current is 0.3A.Every block of surveyed electric current of graphite collector in the present invention
Density is equal to surveyed electric current and accumulates 0.68cm with graphite flake collection liquid surface2The ratio between.
In one embodiment, charge/discharge unit 17 is electrochemical using the PARSTAT4000A of Princeton company manufacture
It learns work station and charge and discharge is carried out to battery；Current sensor 18 is electric using the LTSR 6-NP Halls of 8 LEM companies of Switzerland manufactures
Flow sensor measures the size of current for flowing through 8 knife-edge graphite flake collector external wires respectively；Data acquisition unit 19 uses
The size of current that the 34970A data collecting instruments of Agilent companies of U.S. manufacture survey Hall sensor carry out data acquisition with
Record.
Fig. 7 is the step schematic diagram of measurement method according to an embodiment of the invention, a kind of to utilize the insertion slot type
The measurement method step of afflux structure includes：
Arrange the insertion slot type afflux structure in first step S1, in the flow battery with runner, or by the slot
Formula afflux structure replaces battery current collecting plate and conductive plate,
In second step S2, electrolyte is introduced from inlet 4, flows into flow path groove 7 and is discharged from liquid outlet 5, each knife-edge
The blade part 9 of graphite collector 2 from afflux frame 1 relative to the second surface 11 of first surface 6 be inserted into it is described through slot 8 and from
The protrusion of first surface 6 forms runner spine,
In third step S3, charge/discharge unit 17 is to the flow battery charge and discharge, shank portion 10, negative conductive copper coin
21 and charge/discharge unit 17 formed outer detecting circuit,
In four steps S4, multiple current sensors 18 measure the electric current of the outer detecting circuit respectively,
In 5th step S5, data acquisition unit 19 acquires and records the current data of the current sensor 18.
Measurement method in order to further illustrate the present invention, in one embodiment, Fig. 8 are according to one implementation of the present invention
The current density distributing figure that example measures, as shown, abscissa is the position of shank portion, i.e., aforementioned connection outer detecting circuit
8 shank portions position, ordinate be the position measure charging and discharging under current density, current density is in runner
Inlet upstream region is bigger, and downstream current density is smaller at runner exit.The result shows that under above-mentioned service condition, electricity
Extremely internal electrochemical reaction degree distribution is uneven.It is primarily due to the electrochemical reaction in the porous electrode of flow path upstream
Compare acutely, for electrolyte with being transported in runner, internal reactant gradually participates in reaction in adjacent graphite felt electrode
And be consumed, therefore the reactive material in the graphite felt electrode in flow paths downstream is less, shows lower current density.
The present invention can measure runner flow battery internal current Density Distribution in real time, to inside battery operating condition into
The comprehensive real-time monitoring of row, can accurately measure flow battery internal current Density Distribution situation, easy to operate, and stability is high,
Replicability is strong.
Although embodiment of the present invention is described above in association with attached drawing, the invention is not limited in above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art are under the enlightenment of this specification and in the range for not departing from the claims in the present invention and being protected
In the case of, a variety of forms can also be made, these belong to the row of protection of the invention.
Claims (10)
1. a kind of insertion slot type afflux structure being distributed for measuring the flow battery current density with runner, insertion slot type afflux knot
Structure includes afflux frame (1), inserts multiple knife-edge graphite collectors (2) on afflux frame (1) and fix knife-edge graphite collector
(2) insulated enclosure gasket (3), it is characterised in that：
Afflux frame (1), afflux frame (1) side is equipped with the inlet (4) for introducing electrolyte and opposite side is equipped with for being discharged
The first surface (6) of the liquid outlet (5) of electrolyte, afflux frame (1) is carved with adjacent flow path groove (7) and runs through slot (8), the stream
Road slot (7) one end is connected to inlet (4), and the other end is connected to liquid outlet (5),
Knife-edge graphite collector (2) comprising blade part (9) and shank portion (10), two-by-two adjacent knife-edge graphite afflux
Blade part (9) arranged superposed of body (2), shank portion (10) opposed, the blade portion of each knife-edge graphite collector (2)
Point (9) are inserted into from afflux frame (1) relative to the second surface (11) of first surface (6) described through slot (8) and from first surface
(6) prominent to form runner spine, outer detecting circuit is electrically connected the shank portion (10),
Insulated enclosure gasket (3) comprising multiple grooves (12) for accommodating shank portion (10).
2. insertion slot type afflux structure according to claim 1, it is characterised in that：Preferably, knife-edge graphite collector (2)
Blade part (9) length and width dimensions with it is described through slot (8) it is identical, thickness is identical as the thickness of afflux frame (1).
3. insertion slot type afflux structure according to claim 1, it is characterised in that：The first surface (6), which is equipped with, includes stream
Road slot (7) and the recessed area (13) for running through slot (8), the recessed area (13) and the electrode material (14) of flow battery are close
Contact.
4. insertion slot type afflux structure according to claim 1, it is characterised in that：The flow path groove (7) be serpentine flow path slot,
Reversion flow path groove, parallel fluid channels slot, interdigitated flow path groove or bending wave flow path groove.
5. insertion slot type afflux structure according to claim 1, it is characterised in that：The afflux frame (1) is by reaching Rockwell hardness
Erosion resisting insulation material of the value more than 8 degree is made, corrosion resistant of the insulated enclosure gasket (3) by shore hardness between 40HA~90HA
Erosion insulating materials is made.
6. insertion slot type afflux structure according to claim 1, it is characterised in that：Of the knife-edge graphite collector (2)
Number, groove (12) number are identical with through slot (8) number.
7. insertion slot type afflux structure according to claim 1, it is characterised in that：The thickness of afflux frame (1) is 8mm, runner
Slot (7) is made of a plurality of U rows slot, the length of 36mm, width 2mm, groove depth 2mm, is 34mm through slot (8) length, wide
Degree is 2mm.
8. a kind of measuring system of the flow battery current density distribution with runner, which is characterized in that the measuring system packet
Flow battery and measuring device (16) with runner are included, the flow battery includes according to any one of claim 1-7 institutes
The insertion slot type afflux structure stated, first surface (6) and electrode material (14) are in close contact, and measuring device (16) includes：
Charge/discharge unit (17), to the flow battery charge and discharge, shank portion (10) and charge/discharge unit (17) formation are outer
Portion's detection circuit,
Multiple current sensors (18), the current sensor (18) measure the detection circuit of each shank portion (10) respectively
Electric current,
Data acquisition unit (19), acquisition and the current data for recording the current sensor (18).
9. measuring system according to claim 8, it is characterised in that：The electrode material (14) is graphite felt electrode, every
Film (20) separates positive graphite felt electrode and cathode graphite felt electrode, and negative electrode collector plate (15) side is equipped with conductive copper plate
(21), the current sensor (18) is Hall current sensor.
10. a kind of measurement method using the insertion slot type afflux structure described in any one of claim 1-7, step include：
In first step (S1), the insertion slot type afflux structure is arranged in the flow battery with runner, or by the insertion slot type
Afflux structure replaces collector plate and conductive plate in battery,
In second step (S2), electrolyte is introduced from inlet (4), flows into flow path groove (7) and is discharged from liquid outlet (5), each
Second surface (11) of the blade part (9) of knife-edge graphite collector (2) from afflux frame (1) relative to first surface (6) is inserted into
It is described to form runner spine through slot (8) and from first surface (6) protrusion,
In third step (S3), charge/discharge unit (17) is to the flow battery charge and discharge, shank portion (10) and charge and discharge list
First (17) form outer detecting circuit,
In four steps (S4), multiple current sensors (18) measure the outer detecting circuit of each shank portion (10) respectively
Electric current,
In 5th step (S5), data acquisition unit (19) acquires and records the current data of the current sensor (18).
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