CN208674270U - A kind of flow battery or pile - Google Patents
A kind of flow battery or pile Download PDFInfo
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- CN208674270U CN208674270U CN201821611406.3U CN201821611406U CN208674270U CN 208674270 U CN208674270 U CN 208674270U CN 201821611406 U CN201821611406 U CN 201821611406U CN 208674270 U CN208674270 U CN 208674270U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model relates to flow battery fields, in particular to flow battery or electric pile structure, liquid flow frame including flake porous electrode and middle part band and its respective shapes and size through-hole, porous electrode is placed in the middle through-hole of liquid flow frame, it is mutually amplexiformed with the middle through-hole inner wall of liquid flow frame the edge of porous electrode, the through-hole as electrolyte flow channel and the through-hole as electrolyte flow pass are equipped in liquid flow frame, the through-hole of electrolyte flow channel is connected by groove as entrance guiding region or through-hole with middle through-hole, the through-hole of electrolyte flow pass as the groove or through-hole that export water conservancy diversion region with middle through-hole by being connected；It is characterized by: removing entrance guiding region and exporting except the liquid flow frame inner wall at the middle through-hole where water conservancy diversion region, strip is equipped between other liquid flow frame middle through-hole inner wall and porous electrode edge insulate porous filled layer；The porous filled layer of the insulation keeps apart porous electrode and liquid flow frame wall surface.
Description
Technical field
The utility model relates to flow battery fields, in particular to flow battery or electric pile structure.
Background technique
Flow battery technology is a kind of emerging electrochemical energy storage technology, because it usually there is stored energy capacitance independently to set with power
The advantages that meter and be widely noticed.In flow battery operational process, the active material in electrolyte is dissolved in reservoir and battery
It is circulated between (or pile).When electrolyte is in pile internal flow, viscous effect is influenced between by electrolyte and wall surface, wall
Nearby flow velocity reduces in face, and smaller closer to wall surface flow velocity, until flow velocity is reduced to 0 at wall surface.The reduction of electrolyte flow rate will
It will lead to the active material update dissolved in electrolyte to slow down, so that active material concentration declines, and then cause biggish
Concentration polarization reduces electric battery (or pile) overall performance, shortens its service life, increases system cost, is unfavorable for liquid stream electricity
The large-scale application in pond.So far, the effective solution still without being directed to this problem.
Utility model content
Degradation problem caused by declining near wall electrolyte flow rate in flow battery proposes a kind of novel
Flow battery or pile, on the basis of traditional assembly method, by adding one at the wall surface that electrode frame and electrode are amplexiformed
Porous filled layer insulate to eliminate the low flow velocity area of near wall, totally polarizes to reduce battery, improves electrolyte utilization rate,
It is final to reduce system cost.
To achieve the above object, specific technical solution provided by the utility model is as follows:
A kind of flow battery or pile, the liquid including flake porous electrode and middle part band and its respective shapes and size through-hole
Frame is flowed, porous electrode is placed in the middle through-hole of liquid flow frame, and the edge of porous electrode is and in the middle through-hole of liquid flow frame
Wall surface mutually amplexiforms, and is equipped with the through-hole as electrolyte flow channel and the through-hole as electrolyte flow pass in liquid flow frame,
The through-hole of electrolyte flow channel is connected by groove as entrance guiding region or through-hole with middle through-hole, and liquid stream is electrolysed
The through-hole in channel as the groove or through-hole that export water conservancy diversion region with middle through-hole by being connected out；It is characterized by: removing
Except the liquid flow frame inner wall at middle through-hole where entrance guiding region and outlet water conservancy diversion region, in the middle part of other liquid flow frames
The porous filled layer of strip insulation is equipped between through-hole wall face and porous electrode edge；The porous filled layer of the insulation will be porous
Electrode is kept apart with liquid flow frame wall surface.
The utility model assembly structure design standard are as follows: the porous filled layer that insulate be located at porous electrode and liquid flow frame wall surface it
Between.
Preferably, the porous filled layer width of insulation is 0~30mm；Length is greater than or equal to porous electrode along electrolysis
The length of liquid flow direction；Thickness differs range with thickness of electrode in 0~10mm
Preferably, the porosity of the porous filled layer of the insulation differs range with porous electrode porosity and is after mounting
0~0.3.
The porous filled layer material of insulation provided by the utility model can select polyurethane, polytetrafluoroethylene (PTFE), polyphenyl and miaow
One of azoles, polyether sulfone materials material or two kinds or more, but not limited to this.
Compared with the prior art, the battery or pile for using the utility model can be rectangle and trapezoidal, can make reactivity
The uniformity of dispensed materials is greatly improved, to guarantee battery and pile internal-response uniformity, weakens localized heat release,
Reduce polarization, high electrolyte utilization rate.Particularly with high-power pile, can effective lower cost, save material.
Technical solutions of the utility model bring beneficial effect
The battery or pile of the utility model are easy to process, easy to operate, improve liquid by adding the porous filled layer of insulation
The distributing homogeneity of active material inside galvanic battery and effectively promote battery performance.Specifically:
By fluid, the especially influence of liquid stream viscosity itself, fluid close to wall area when flowing, in certain range
Interior, closer to wall surface, the flow velocity of fluid is smaller, until flow velocity is down to 0 at wall surface.Therefore, electrolyte updates speed in the area
Rate is slow, with the continuous progress of reaction, active material insufficient supply occurs, and then polarize and increase, voltage efficiency reduces, electrolyte
Utilization rate reduces, and finally makes the reduction of battery overall performance.
By adding a porous insulation filled layer in liquid flow frame and the electrode place of amplexiforming, so that active material updates this slower
Electrochemical reaction does not occur in one liquid lamella, so that the active material concentration at electrode zone edge increases, active material
It is more evenly distributed, reduces battery polarization, promote battery performance.
Detailed description of the invention
1 assembling structure schematic diagram of Fig. 1 embodiment.
2 assembling structure schematic diagram of Fig. 2 embodiment.
3 assembling structure schematic diagram of Fig. 3 comparative example.
Symbol description:
1- electrolyte main flow inlet, 2- entrance guiding region, 3- wall surface, the porous filled layer of 4- insulation, 5- porous electrode, 6-
Export water conservancy diversion region, 7- electrolyte main flow outlet
Active material concentration distribution map in embodiment 1 and comparative example 2 under the identical service condition of Fig. 4.
Specific embodiment
Embodiment 1
As shown in Figure 1, a kind of flow battery assembling structure.Areas outside as shown in the figure is liquid flow frame framework, is electricity in figure
Solve the body region of liquid stream warp, including entrance guiding region 2, the porous filled layer 4 of insulation, porous electrode 5 and outlet water conservancy diversion region
6.It is wherein provided with electrolyte main flow inlet 1 on entrance guiding region, exports and is provided with electrolyte main flow outlet on water conservancy diversion region
7, porous filling of insulating is placed between porous electrode 5 and wall surface 3.Porous electrode is trapezoidal, a horizontal direction upper bottom width
For 30mm, bottom width is 60mm, and material is carbon felt；Porous electrode each side sets the porous filled layer of an insulation, and shape is flat
Row quadrangle, horizontal width are 3mm, and material is polyurethane.Entrance guiding region and outlet water conservancy diversion zone level direction are wide
Degree is porous electrode and the sum of the porous filled layer horizontal direction width that insulate, respectively entrance 36mm and outlet 66mm.
Embodiment 2
As shown in Fig. 2, a kind of flow battery assembling structure.Areas outside as shown in the figure is liquid flow frame framework, is electricity in figure
Solve the body region of liquid stream warp, including entrance guiding region 2, the porous filled layer 4 of insulation, porous electrode 5 and outlet water conservancy diversion region
6.It is wherein provided with electrolyte main flow inlet 1 on entrance guiding region, exports and is provided with electrolyte main flow outlet on water conservancy diversion region
7, porous filling of insulating is placed between porous electrode 5 and wall surface 3.Porous electrode is a rectangle, and horizontal direction width is
30mm, material are carbon felt；Porous electrode each side sets the porous filled layer of a rectangular dielectric, and horizontal width is 3mm, material
Matter is polyurethane.Entrance guiding region and outlet water conservancy diversion zone level direction width are porous electrode and the porous filled layer water that insulate
Square to the sum of width 36mm.
Comparative example 3
Comparative example assembling structure selects traditional rectangle flow battery assembling structure, as shown in Figure 3.Outside region as shown in the figure
Side is liquid flow frame framework, the body region flowed through in figure for electrolyte, including entrance guiding region 2, porous electrode 5 and outlet guide
Flow region 6.It is wherein provided with electrolyte main flow inlet 1 on entrance guiding region, exports and is provided with electrolyte master on water conservancy diversion region
Outflux 7.Porous electrode is a rectangle, and horizontal direction width is 30mm, and material is carbon felt.Entrance guiding region and outlet guide
Flow zone level direction width 30mm.
By taking all-vanadium flow battery as an example, commercial packages COMSOL Multiphysics is utilized@Carry out simulation calculating, mould
Quasi- mathematical model used specifically includes that
The conservation of momentum and continuity equation:
Wherein,Velocity vector and pressure, μ and μ are respectively indicated with P*It respectively indicates electrolyte intrinsic viscosity and effectively glues
Degree, K indicate the permeability of porous media (porous electrode), are acquired by Carman-Kozeny equation.
Conservation of matter equation:
Wherein ciFor the concentration of material i, SiFor the source item in material i conservation equation,For having in porous electrode region
Imitate diffusion coefficient.
Boundary condition and primary condition:
Wherein inlet pressure is set as 24000 Pa, and back pressure is set as 0 Pa.
In a model, the concentration of entrance vanadium ion is associated with charging and discharging state (SoC), with the shadow of elimination reaction time
It rings.According to fully developed flow it is assumed that the diffusion flux of exit all materials is set as 0.Wall surface boundary is set as 0 flux.Tool
The expression formula of body are as follows:
WithThe respectively initial concentration of anode and cathode vanadium ion, is set as 1500mol m in this model-3.Model
The convergent relative error factor is 1 × 10-6。
In 200mA cm-2Current density under charge, SoC be 50% when, to embodiment 2 and comparative example 3 simulation calculate
The result arrived is as shown in Fig. 4 and following table:
As it can be seen that the uniformity of reactive substance distribution is significantly improved using the assembling structure of the utility model, polarization
It is significantly reduced, and then reduces localized heat release, improved electrolyte utilization rate, reduce cost.
Claims (5)
1. a kind of flow battery or pile, the liquid stream including flake porous electrode and middle part band and its respective shapes and size through-hole
Frame, porous electrode are placed in the middle through-hole of liquid flow frame, the edge of porous electrode with the middle through-hole inner wall of liquid flow frame
Face is mutually amplexiformed, and is equipped with the through-hole as electrolyte flow channel and the through-hole as electrolyte flow pass, electricity in liquid flow frame
The through-hole for solving liquid flow channel is connected by groove as entrance guiding region or through-hole with middle through-hole, and electrolyte flows out
The through-hole in channel as the groove or through-hole that export water conservancy diversion region with middle through-hole by being connected；It is characterized by: remove into
Lead to except the liquid flow frame inner wall at middle through-hole where mouth water conservancy diversion region and outlet water conservancy diversion region, in the middle part of other liquid flow frames
The porous filled layer of strip insulation is equipped between hole inner wall and porous electrode edge；The porous filled layer of the insulation is by porous electricity
Pole keeps apart with liquid flow frame wall surface.
2. flake porous electrode and middle part including quadrangle are with corresponding four according to flow battery described in claim 1 or pile
The liquid flow frame of side shape through-hole, porous electrode are placed in the middle through-hole of liquid flow frame, and the edge of porous electrode is and liquid flow frame
Middle through-hole inner wall mutually amplexiform.
3. according to flow battery described in claim 1 or pile, the porous filled layer of insulation along vertical liquid flow frame from the inside to the outside
Width be 0.1~30mm；The porous filled layer that insulate when assembly perpendicular to the thickness of electrode surface differs range with thickness of electrode
In 0~10mm.
4. according to the flow battery of claim 1 or 3 or pile, after mounting the porosity of the porous filled layer of insulation with
It is 0~0.3 that porous electrode porosity, which differs range,.
5. porous electrode includes anode and cathode according to flow battery described in claim 1 or pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821611406.3U CN208674270U (en) | 2018-09-29 | 2018-09-29 | A kind of flow battery or pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821611406.3U CN208674270U (en) | 2018-09-29 | 2018-09-29 | A kind of flow battery or pile |
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| Publication Number | Publication Date |
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| CN208674270U true CN208674270U (en) | 2019-03-29 |
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| CN201821611406.3U Active CN208674270U (en) | 2018-09-29 | 2018-09-29 | A kind of flow battery or pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112447997A (en) * | 2019-08-28 | 2021-03-05 | 中国科学院大连化学物理研究所 | Flow battery galvanic pile bipolar plate and application |
| CN112447998A (en) * | 2019-08-28 | 2021-03-05 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for flow battery stack and application |
-
2018
- 2018-09-29 CN CN201821611406.3U patent/CN208674270U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112447997A (en) * | 2019-08-28 | 2021-03-05 | 中国科学院大连化学物理研究所 | Flow battery galvanic pile bipolar plate and application |
| CN112447998A (en) * | 2019-08-28 | 2021-03-05 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for flow battery stack and application |
| CN112447997B (en) * | 2019-08-28 | 2023-11-17 | 中国科学院大连化学物理研究所 | Flow battery pile bipolar plate and application |
| CN112447998B (en) * | 2019-08-28 | 2024-03-26 | 中国科学院大连化学物理研究所 | Bipolar plate suitable for flow battery pile and application |
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