CN207233869U - Liquid flow frame for flow battery - Google Patents

Abstract

The utility model proposes the liquid flow frame for flow battery.The liquid flow frame includes：First flow manifold, is arranged on one end of reaction zone and is connected with reaction zone, and its longitudinal section product is gradually reduced in a first direction；First Transition runner, its one end accumulate larger one end with the first flow manifold longitudinal section and are connected, and the other end is provided with the first liquid mouth；Second flow manifold, is arranged on the other end of reaction zone and is connected with reaction zone, and its longitudinal section product is gradually reduced in a second direction；Second transition runner, its one end accumulate larger one end with the second flow manifold longitudinal section and are connected, and the other end is provided with and the second liquid mouth；Wherein, first direction is opposite with second direction.The liquid flow frame that the utility model is proposed, the tapered flow manifold of its width of flow path, the flow and speed that can make the electrolyte of inflow reaction zone are all evenly changed, and extend pile service life.

Description

Liquid flow frame for flow battery

Technical field

Flow battery field is the utility model is related to, specifically, the utility model is related to the liquid flow frame for flow battery.

Background technology

All-vanadium flow battery, is the large-scale energy-storage battery of a kind of more efficient, longer life expectancy, security higher.Can be effective Solve wind-power electricity generation, solar power generation output it is unstable the problem of, for power grid flat peak load have the function that it is very big, not Next wide new energy field, energy storage field, power grid adjusting field all have wide application space.Its cardinal principle is to use The vanadium ion solution of different valence state is circulated as positive and negative anodes electrolyte by external pump driving electrolyte between fluid reservoir and pile Redox reaction occurs in pile for flowing, electrolyte so as to complete the battery of charge and discharge process.

The core component of all-vanadium flow battery is battery pile, it is mainly handed over by liquid flow frame, bipolar plates, porous electrode and ion Change the composition such as film.Electrolyte provides power by pump and goes out to enter in single battery from electrolyte perfusion, is then passed through in single battery Cross liquid flow frame and flow into reaction generation potential in carbon felt electrode.So liquid flow frame is part important in pile, its performance Quality will directly influence the stability and operational efficiency of all-vanadium flow battery.

At present, common liquid flow frame structure in order to enable electrolyte enter carbon felt electrode when, feed liquor resistance to the greatest extent may be used Can ground increase, therefore liquid flow frame structure is typically all that various " snakelike " and " arch " etc. are opened up on monocell branch is more tortuous Runner.But using the liquid flow frame of these above-mentioned flow passage structures, the battery efficiency of all-vanadium flow battery is unsatisfactory, and Also there are the short technical problem of battery.

Therefore, the liquid flow frame structure for all-vanadium flow battery at this stage still has much room for improvement.

The content of the invention

The utility model is intended to solve at least some of the technical problems in related technologies.

The utility model is the following discovery based on inventor and completes：

The inventor of the utility model has found in the course of the research, at this stage frequently with various " snakelike " and " arch " Etc. more tortuous runner, it finally enters the usually straight runner used during the carbon felt electrode of reaction zone.However, according to fluid The theory of mechanics, applicant have found under study for action, and with reference to figure 6, the effect evenly distributed of straight runner convection current amount is also not as pre- It is good in thinking, so as to can cause that electrolyte enters the flow of reaction zone and speed is distributed and uneven everywhere, and then influence battery Efficiency.

The inventor of the utility model designs one kind and carries longitudinal section face for current liquid flow frame inner flow passage design deficiency The new liquid flow frame flow passage structure of the flow manifold gradually to contract so that flow into the electrolyte of reaction zone flow and speed evenly Change, while cause the impedance of electrolyte conductive path sufficiently large and by-pass current can be reduced, so as to improve the energy of flow battery Amount efficiency, and extend the service life of the battery.

In view of this, a purpose of the utility model be to propose a kind of flow of electrolyte for making inflow reaction zone and That speed all homogenizes, simple in structure, design more meets hydromechanical or effective use liquid flow frame structure.

In the utility model in a first aspect, the utility model proposes a kind of liquid flow frame for flow battery.

Embodiment according to the present utility model, the liquid flow frame include：First flow manifold, first flow manifold are set Put in one end of reaction zone and be connected with the reaction zone, and the longitudinal section product of first flow manifold is in a first direction It is gradually reduced；First Transition runner, one end of the First Transition runner and the first flow manifold longitudinal section product are larger One end is connected, and the other end is provided with the first liquid mouth being connected with fluid reservoir；Second flow manifold, second flow manifold It is arranged on the other end of the reaction zone and is connected with the reaction zone, and the longitudinal section product of second flow manifold is It is gradually reduced on two directions；Second transition runner, one end of second transition runner and the second flow manifold longitudinal section The larger one end of product is connected, and the other end is provided with the second liquid mouth being connected with the fluid reservoir；Wherein, the first direction It is opposite with the second direction.

Inventor is it was unexpectedly observed that the liquid flow frame of the utility model embodiment, the tapered flow manifold of its longitudinal section area The change of width of flow path designed according to Hydrodynamics Theory, so as to make the flow of the electrolyte of inflow reaction zone and Speed is all evenly changed, and then can be consistent the chemical reaction inside pile, keeps pile internal temperature uniform, extends electricity Heap service life；On the other hand the length of electrode frame inner flow passage can also be lengthened, effective internal resistance of self-discharge of battery is improved, prolongs The service life of long pile.

In addition, according to the liquid flow frame of the utility model above-described embodiment, there can also be technical characteristic additional as follows：

Embodiment according to the present utility model, first flow manifold are provided with first close to the side of the reaction zone Distribution grid；Second flow manifold is provided with the second distribution grid close to the side of the reaction zone.

Embodiment according to the present utility model, first distribution grid and second distribution grid are wrapped independently of one another Include multiple cylinders being spaced apart.

Embodiment according to the present utility model, the First Transition runner are provided with the first flow manifold junction First rectifying block；Second transition runner is provided with the second rectifying block with the second flow manifold junction.

Embodiment according to the present utility model, first rectifying block and second rectifying block include multiple equidistant respectively The first branching block and the second branching block set, and the length of first branching block and second branching block is each independent For 3~5mm.

Embodiment according to the present utility model, first flow manifold and First Transition runner respectively with described second point Flow runner and the second transition runner central symmetry.

Embodiment according to the present utility model, the First Transition runner are mutually perpendicular to first flow manifold, institute The second transition runner is stated to be mutually perpendicular to second flow manifold.

Any point on embodiment according to the present utility model, first flow manifold and second flow manifold Width of flow path D is shown in formula I：D (x)=ax²+b·x+c(0≤x≤L)(Ⅰ)；Wherein, L be the reaction zone width, x The reaction zone is arrived in said first direction close to the First Transition runner one for any point on first flow manifold Any point arrives the reaction zone close to described second in this second direction in the distance at end or second flow manifold The distance of transition runner one end；Also, three points on first flow manifold and second flow manifold meet following Condition：X1 is 0, width of flow path D1 is that (0.13~0.17) L, x3 L, width of flow path D3 are that (0.05~0.3) D1, x2 is L/2, width of flow path D2 are (0.35~0.45) (D1+D3).

The additional aspect and advantage of the utility model will be set forth in part in the description, partly by from following description In become obvious, or recognized by the practice of the utility model.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the cross-sectional structure schematic diagram of the liquid flow frame of the utility model one embodiment；

Fig. 2 is the cross-sectional structure schematic diagram of the liquid flow frame of the utility model another embodiment；

Fig. 3 is the cross-sectional structure schematic diagram of the decrement flow manifold of the liquid flow frame of the utility model one embodiment；

Fig. 4 is that two liquid flow frames of the flow battery of the utility model one embodiment are centrosymmetric the signal of setting Figure；

Fig. 5 is the fluid Simulation figure of the decrement flow manifold of the liquid flow frame of the utility model one embodiment；

Fig. 6 is the fluid Simulation figure of the prior art " bow " type runner.

Reference numeral

100 reaction zones

210 first runners

2110 first distribution grids

220 First Transition runners

2210 first rectifying blocks

230 first liquid mouths

310 second flow manifolds

3110 second distribution grids

320 second transition runners

3210 second rectifying blocks

330 second liquid mouths

400 the 3rd liquid mouths

500 the 4th liquid mouths

Embodiment

The embodiment of the utility model is described below in detail, those skilled in the art is it will be appreciated that example below is intended to use In explanation the utility model, and it is not construed as the limitation to the utility model.Unless stated otherwise, do not have in embodiment below It is expressly recited particular technique or condition, those skilled in the art according to common technology or condition in the art or can press Carried out according to product description.

In the one side of the utility model, the utility model proposes a kind of liquid flow frame for flow battery.Reference Fig. 1~3,5, are described in detail the liquid flow frame of the utility model.

Embodiment according to the present utility model, with reference to Fig. 1, which mainly includes：First flow manifold 210, first Transition runner 220, the first liquid mouth 230, the second flow manifold 310, the second transition runner 320 and the second liquid mouth 330.Wherein, First flow manifold 210 is arranged on one end of reaction zone 100, and is connected with the reaction zone 100, and first flow manifold 210 longitudinal section product is gradually reduced in a first direction；One end of First Transition runner 220 and the first flow manifold 210 Longitudinal section accumulate larger one end A and be connected, the other end is provided with the first liquid mouth 230, and the first liquid mouth 230 can be with fluid reservoir phase Connection；Second flow manifold 310 is arranged on the other end of reaction zone 100, and is connected with the reaction zone 100, and this second point The longitudinal section product of stream runner 310 is gradually reduced in a second direction；Flowed with the second shunting one end of second transition runner 320 310 longitudinal section of road accumulates larger one end A ' and is connected, and the other end is provided with the second liquid mouth 330, and the second liquid mouth 330 can be with liquid storage Tank is connected；Also, first direction is opposite with second direction.It should be noted that with reference to Fig. 1, the first flow manifold 210 or the The longitudinal section of two flow manifolds 310 specifically refers to the section perpendicular to first direction or second direction.

The inventor of the utility model designs one kind and carries longitudinal section face for current liquid flow frame inner flow passage design deficiency The new liquid flow frame flow passage structure of the flow manifold gradually to contract, with reference to figure 5, may be such that the electrolyte for flowing into reaction zone flow and Speed is evenly changed, while can also make the impedance of electrolyte conductive path sufficiently large and can reduce by-pass current, so as to improve The energy efficiency of flow battery, and extend the service life of the battery.

Embodiment according to the present utility model, with reference to figure 2, the first flow manifold 210 is set close to the side B of reaction zone 100 It is equipped with the first distribution grid 2110.Correspondingly, the second flow manifold 310 is also equipped with second close to the side B ' of reaction zone 100 Distribution grid 3110 (does not mark) in figure.In this way, using above-mentioned multiple distribution grids, rectification further can be carried out to electrolyte, The uniform flow for flowing into reaction zone is consistent.Embodiment according to the present utility model, the first distribution grid 2110 and second point Concrete shape with grid 3110 is not particularly limited, and those skilled in the art can be according to the distribution grid to electrolyte Distribution effects is designed.In some embodiments of the utility model, the first distribution grid 2110 and the second distribution grid 3110 can use cylinder, in this way, more effectively can be shunted electrolyte using the distribution grid of above-mentioned shape uniform.According to The particular number of the embodiment of the utility model, the first distribution grid 2110 and the second distribution grid 3110 is also from special limit System, those skilled in the art can be designed according to the physical length of the tapered flow manifold of longitudinal section area.In this practicality In some new embodiments, the first distribution grid 2110 and the second distribution grid 3110 can be separately 23~25, In this way, using the distribution grid of above-mentioned quantity, the flow of the electrolyte of inflow reaction zone can be made evenly consistent.

Embodiment according to the present utility model, with reference to figure 2, First Transition runner 220 is vertical with the first flow manifold 210 Set.Correspondingly, the second transition runner 320 is also vertically disposed with the second flow manifold 310.In this way, without increase While the area of liquid flow frame, it can effectively extend the total length of electrode frame inner flow passage, so as to improve having for self-discharge of battery Internal resistance is imitated, and extends the service life of pile.

Embodiment according to the present utility model, with reference to figure 2, the connection of 220 and first flow manifold 210 of First Transition runner Place A is provided with the first rectifying block 2210.Correspondingly, the junction A ' of the second transition runner 320 and the second flow manifold 310 is set There is the second rectifying block 3210 (not marked in figure).In this way, when electrolyte enters longitudinal section area gradually from transition runner by turning round During the flow manifold of contracting, rectifying block plays the role of rectification, so that the electrolyte flowed into is evenly.

Embodiment according to the present utility model, the first rectifying block 2210 and 3210 specific arrangement mode of the second rectifying block are not It is particularly limited, those skilled in the art can be connected specific according to the actual flow velocity and flow manifold of electrolyte with reaction zone Width is designed.In some embodiments of the utility model, the first rectifying block 2210 and the second rectifying block 3210 are wrapped respectively Multiple the first branching blocks and the second branching block being placed equidistant with are included, and the length of the first branching block and the second branching block is each only It is vertical for 3~5mm.In this way, the multiple branching blocks set using aforesaid way, can preferably play rectified action, so that stream Enter the electrolyte of the tapered flow manifold of longitudinal section area evenly.It should be noted that the first rectifying block 2210 and second is whole The length of stream block 3210 specifically refers to the length in the first direction or in second direction.

The stream at any point on embodiment according to the present utility model, the first flow manifold 210 and the second flow manifold 310 Road width D is shown in formula I：D (x)=ax²+b·x+c(0≤x≤L)(Ⅰ).With reference to figure 3, it is with the first flow manifold 210 , the L in formula I is the width of reaction zone 100, specifically, x (hangs down in a first direction for any point on the first flow manifold 210 The x directions of straight coordinate system) on distance to reaction zone 100 close to 220 one end of First Transition runner；Also, the first flow manifold Known three points will meet the following conditions on 210：When x1 is 0, the width of flow path D1 (d1 is designated as in figure) of starting point is (0.13 ~0.17) L；When x3 is L, the width of flow path D3 (d3 is designated as in figure) of destination county is (0.05~0.3) D1；And x2 is L/2 When, the width of flow path D2 (d2 is designated as in figure) of midpoint is (0.35~0.45) (D1+D3).Correspondingly, the second flow manifold 310 width of flow path refer to the first flow manifold 210.In this way, present inventor designs above-mentioned according to hydrodynamics Tapering type varying width D the first flow manifold 210 and the second flow manifold 310, can make from flow manifold flow into reaction zone Electrolyte flow and speed all evenly, so as to not interfere with the efficiency of battery more, while can more make electrolyte conductive logical The impedance on road is sufficiently large and can reduce by-pass current, so as to further improve the energy efficiency of flow battery, and further prolongs The service life of the long battery.

Embodiment according to the present utility model, with reference to figure 2, the width of First Transition runner 220 can be from the first liquid mouth What one end of the 230 to the first runner 210 linearly changed.Correspondingly, the width of the second transition runner 320 can be from second What one end of the 330 to the second runner of liquid mouth 310 also linearly changed.In this way, 220 and second transition runner of First Transition runner 320, it can not only increase the length of whole runner to increase impedance and reduce shunt circuit, but also be alternatively arranged as electrolyte from liquid mouth One section of transition before to flow manifold.

Embodiment according to the present utility model, with reference to figure 2, the first flow manifold 210 and the second flow manifold 310 are centers Symmetrically, and First Transition runner 220 and the second transition runner 320 are also centrosymmetric, then the first liquid mouth 230 and the second liquid Mouthfuls 330 be separately positioned on two of liquid flow frame it is diagonal on.In this way, using the two component runners and transition runner of above-mentioned design, can While need not increase the area of liquid flow frame, it can effectively extend the total length of electrode frame inner flow passage, so as to improve battery Effective internal resistance of self discharge, and extend the service life of pile.

In some embodiments of the utility model, the first liquid mouth 230 and the second liquid mouth 330 can divide in charge and discharge process Not Zuo Wei inlet and liquid outlet use.Specifically, during charging, second liquid mouth, 330 conduct as inlet of the first liquid mouth 230 Liquid outlet, electrolyte flows into First Transition runner 220 from the first liquid mouth 230, then is uniformly flowed into instead by the first runner 210 Area 100 is answered, fully the second runner 310 and the second transition runner 320 is flowed successively through after reaction, is come out from the second liquid mouth 330；Put When electric, the first liquid mouth 230 as liquid outlet and the second liquid mouth 330 is used as inlet, then electrolyte flowed into from the second liquid mouth 330, Flowed out from the first liquid mouth 230.

In conclusion embodiment according to the present utility model, the utility model proposes a kind of liquid flow frame, its longitudinal section face The change of the width of flow path of the flow manifold gradually to contract is designed according to Hydrodynamics Theory, so as to make inflow reaction zone Electrolyte flow and speed all evenly change, and then can be consistent the chemical reaction inside pile, keep in pile Portion's temperature is uniform, extends pile service life；On the other hand the length of electrode frame inner flow passage can also be lengthened, improves battery certainly Effective internal resistance of electric discharge, extends the service life of pile.

Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only retouched The property stated, without limiting the utility model in any way.

Embodiment 1

In this embodiment, fluid Simulation is carried out to the feed liquor runner of above-mentioned liquid flow frame.Wherein, the specific bar of simulation Part is all provided that uniform flow 0.4m/s for inlet velocity, and outlet is arranged to isobaric outlet, and length of tapered runner is in this 120mm, parameter a=1/1800, b=1/60, c=5 in formula I.

The results are shown in Figure 5 for the fluid simulation of the embodiment, wherein, analog result, which has been marked inside runner, and outflow is vertical cuts Electrolyte velocity (Velocity) distribution situation of the tapered flow manifold of face area.As seen from Figure 5, longitudinal section area is tapered Flow manifold can realize evenly distributing for flow and speed to the electrolysis for flowing into porous electrode, meet that flow battery is required Flow of electrolyte evenly distributes effect.

Comparative example 1

In the comparative example, according to simulated conditions substantially the same manner as Example 1, to current common " bow " type runner section Carry out fluid Simulation.Wherein, the width of " bow " type runner is 6mm, is laterally 120mm per segment length, wherein branching block At intervals of 3mm.

The results are shown in Figure 6 for the fluid simulation of the embodiment, wherein, analog result has marked inside " bow " type runner and stream Go out electrolyte velocity (Velocity) distribution situation of the runner.As seen from Figure 6, " bow " type runner is to the equal of flow of electrolyte Even distribution effects is unsatisfactory.

Summarize

Integrated embodiment 1 and comparative example 1 can show that it can be seen that, Fig. 6 is compared in the flowing of Fig. 5 from the contrast of Fig. 5 and Fig. 6 Flowing uniformly much, i.e. tapered currently used " bow " the type stream of flow manifold performance ratio of the longitudinal section area of this patent design The mobile performance in road is much better.So the liquid flow frame that the utility model is proposed, the tapered flow manifold of its longitudinal section area The change of width of flow path is designed according to Hydrodynamics Theory, so as to make the flow of the electrolyte of inflow reaction zone and speed Degree is all evenly changed, and then can be consistent the chemical reaction inside pile, keeps pile internal temperature uniform, extends pile Service life；On the other hand the length of electrode frame inner flow passage can also be lengthened, improves effective internal resistance of self-discharge of battery, is extended The service life of pile.

In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model Limitation.

In the description of the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " company Connect ", the term such as " fixation " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally； Can mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be with It is the interaction relationship of connection inside two elements or two elements.For the ordinary skill in the art, may be used To understand concrete meaning of the above-mentioned term in the utility model as the case may be.

In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the utility model, " multiple " are meant that at least two, such as two It is a, three etc., unless otherwise specifically defined.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (8)

1. A kind of 1. liquid flow frame for flow battery, it is characterised in that including：

   First flow manifold, first flow manifold is arranged on one end of reaction zone and is connected with the reaction zone, and institute The longitudinal section product for stating the first flow manifold is gradually reduced in a first direction；

   Larger one end phase is accumulated in First Transition runner, one end of the First Transition runner with the first flow manifold longitudinal section Connection, the other end are provided with the first liquid mouth being connected with fluid reservoir；

   Second flow manifold, second flow manifold are arranged on the other end of the reaction zone and are connected with the reaction zone It is logical, and the longitudinal section product of second flow manifold is gradually reduced in a second direction；

   Larger one end phase is accumulated in second transition runner, one end of second transition runner with the second flow manifold longitudinal section Connection, the other end are provided with the second liquid mouth being connected with the fluid reservoir；

   Wherein, the first direction is opposite with the second direction.
2. 2. liquid flow frame according to claim 1, it is characterised in that

   First flow manifold is provided with the first distribution grid close to the side of the reaction zone；

   Second flow manifold is provided with the second distribution grid close to the side of the reaction zone.
3. 3. liquid flow frame according to claim 1, it is characterised in that first distribution grid and second distribution grid Include multiple cylinders being spaced apart independently of one another.
4. 4. liquid flow frame according to claim 1, it is characterised in that

   The First Transition runner is provided with the first rectifying block with the first flow manifold junction；

   Second transition runner is provided with the second rectifying block with the second flow manifold junction.
5. 5. liquid flow frame according to claim 4, it is characterised in that first rectifying block and second rectifying block difference Including multiple the first branching blocks and the second branching block being placed equidistant with, and first branching block and second branching block Length is independently each 3~5mm.
6. 6. liquid flow frame according to claim 1, it is characterised in that the first flow manifold and First Transition the runner difference With second flow manifold and the second transition runner central symmetry.
7. 7. liquid flow frame according to claim 1, it is characterised in that the First Transition runner and first flow manifold It is mutually perpendicular to, second transition runner is mutually perpendicular to second flow manifold.
8. 8. liquid flow frame according to claim 1, it is characterised in that first flow manifold and second flow manifold The width of flow path D at upper any point is shown in formula I：

   D (x)=ax2+bx+c (0≤x≤L) (I)；

   Wherein, L is the width of the reaction zone,

   X arrives the reaction zone close to the First Transition stream in said first direction for any point on first flow manifold Any point arrives the reaction zone close to described in this second direction in the distance of road one end or second flow manifold The distance of second transition runner one end；

   Also, three points on first flow manifold and second flow manifold meet the following conditions：

   X1 is 0, width of flow path D1 is (0.13~0.17) L,

   X3 is L, width of flow path D3 is (0.05~0.3) D1,

   X2 is L/2, width of flow path D2 is (0.35~0.45) (D1+D3).