CN220914274U - Zinc bromine flow battery structure capable of inhibiting self-discharge - Google Patents
Zinc bromine flow battery structure capable of inhibiting self-discharge Download PDFInfo
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- CN220914274U CN220914274U CN202322568644.8U CN202322568644U CN220914274U CN 220914274 U CN220914274 U CN 220914274U CN 202322568644 U CN202322568644 U CN 202322568644U CN 220914274 U CN220914274 U CN 220914274U
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- electrode frame
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- positive electrode
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- ZRXYMHTYEQQBLN-UHFFFAOYSA-N [Br].[Zn] Chemical compound [Br].[Zn] ZRXYMHTYEQQBLN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 230000002401 inhibitory effect Effects 0.000 title description 3
- 239000003792 electrolyte Substances 0.000 claims abstract description 86
- 239000007788 liquid Substances 0.000 claims abstract description 43
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 4
- 230000000452 restraining effect Effects 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011701 zinc Substances 0.000 abstract description 11
- 229910052725 zinc Inorganic materials 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 6
- 229910052794 bromium Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 description 2
- AZUYLZMQTIKGSC-UHFFFAOYSA-N 1-[6-[4-(5-chloro-6-methyl-1H-indazol-4-yl)-5-methyl-3-(1-methylindazol-5-yl)pyrazol-1-yl]-2-azaspiro[3.3]heptan-2-yl]prop-2-en-1-one Chemical compound ClC=1C(=C2C=NNC2=CC=1C)C=1C(=NN(C=1C)C1CC2(CN(C2)C(C=C)=O)C1)C=1C=C2C=NN(C2=CC=1)C AZUYLZMQTIKGSC-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229940102001 zinc bromide Drugs 0.000 description 1
Classifications
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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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- Hybrid Cells (AREA)
Abstract
The utility model belongs to the technical field of energy storage of flow batteries, and particularly relates to a zinc-bromine flow battery, which is a battery pack formed by overlapping more than two single batteries from top to bottom in series (liquid paths and circuits are all in series), wherein each single battery mainly comprises an annular negative electrode frame, a diaphragm and an annular positive electrode frame, wherein the annular negative electrode frame is provided with a through hole for accommodating an electrode in the middle part, and the annular positive electrode frame is provided with a through hole for accommodating the electrode in the middle part; the negative electrode is arranged in the through hole in the middle of the annular negative electrode frame, and the positive electrode is arranged in the through hole in the middle of the annular positive electrode frame; according to the utility model, the liquid guide plates at two ends of the zinc-bromine flow battery are provided with a certain inclined angle, when the battery is stopped and placed, positive and negative electrolyte in the positive electrode and the negative electrode can flow out of the electric pile from the carbon felt electrode through the outlet flow passage under the action of gravity, so that the liquid storage amount of the carbon felt electrode is reduced, the water corrosion of zinc can be reduced at the negative electrode side, and the self-discharge of the zinc-bromine flow battery is inhibited.
Description
Technical Field
The utility model belongs to the technical field of energy storage of flow batteries, and particularly relates to a zinc-bromine flow battery.
Background
The zinc-bromine flow battery is a low-cost and high-safety flow battery energy storage technology and has higher energy density. The lithium ion battery is characterized in that a negative electrode is formed by zinc deposition and dissolution, zinc ions are converted into zinc simple substances during charging and deposited on a carbon felt electrode, and bromine molecules generated by a positive electrode penetrate through a porous diaphragm due to the adoption of the porous diaphragm by a zinc bromine flow battery, so that the battery is subjected to self-discharge reaction, and the battery capacity is reduced. After full charge, the zinc bromine flow battery cathode is zinc simple substance, if it is soaked in electrolyte for a long time, hydrolysis reaction can take place with electrolyte, zinc simple substance takes place water corrosion, has reduced battery capacity, simultaneously because there is a large amount of bromine molecules in the positive pole, can see through the diaphragm and take place self-discharge reaction with the zinc of negative pole when shelving, further reduce battery capacity, consequently zinc bromine flow battery's shelving performance is the important problem that promotes its application prospect.
Disclosure of utility model
In order to solve the technical problems, the utility model aims to provide a zinc-bromine flow battery structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
A zinc bromine flow battery structure for restraining self discharge is a battery pack formed by overlapping more than two single batteries from top to bottom in series (liquid paths and circuits are all in series), wherein each single battery mainly comprises an annular negative electrode frame, a diaphragm and an annular positive electrode frame, wherein the annular negative electrode frame is provided with a through hole for accommodating an electrode, the annular negative electrode frame is provided with a through hole for accommodating the electrode, and the annular positive electrode frame is provided with a through hole for accommodating the electrode; the negative electrode is arranged in the through hole in the middle of the annular negative electrode frame, and the positive electrode is arranged in the through hole in the middle of the annular positive electrode frame;
Through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame; grooves (on the right side) serving as a negative electrolyte inlet runner (on the left side) and a negative electrolyte outlet runner are respectively arranged on one side surface A of the negative electrode frame, which is close to the diaphragm, and on two opposite sides (namely the left side and the right side of the surface A) of the rectangular through hole;
Grooves (on the right side) serving as an anode electrolyte inlet runner (on the left side) and an anode electrolyte outlet runner (on the right side) are respectively arranged on one side surface B of the anode electrode frame, which is close to the diaphragm, and on two opposite sides (namely the left side and the right side of the surface B) of the rectangular through hole;
Through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame;
The negative electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the negative electrode frame, and the negative electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the negative electrode frame; the positive electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the positive electrode frame, and the positive electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the positive electrode frame;
Copper plates, liquid guide plates and end plates are respectively arranged at the upper end and the lower end of the battery pack in a direction away from the battery pack;
the end plate is a rectangular flat plate with upper and lower surfaces parallel, and the surfaces of the end plate are parallel to a horizontal plane;
The copper plate is a rectangular flat plate with the upper surface and the lower surface parallel, and the surfaces of the rectangular flat plate are parallel to the horizontal plane;
The method is characterized in that:
The liquid guide plate is a wedge hexahedron, one side surface of the liquid guide plate, which is close to the end plate, is a plane parallel to the horizontal plane, and the opposite side surface C, which is close to the copper plate, is a plane with a certain inclination angle with the horizontal plane; rectangular with the same shape and size and the parallel left and right side surfaces of the wedge-shaped hexahedron, and rectangular trapezoids with the same shape and size and the parallel front and rear side surfaces of the wedge-shaped hexahedron;
And the horizontal plane position D of one end (left end) of the liquid guide plate surface C close to the negative electrode electrolyte inlet flow channel and the positive electrode electrolyte inlet flow channel is higher than the horizontal plane position E of one end (right end) of the liquid guide plate surface C close to the negative electrode electrolyte outlet flow channel and the positive electrode electrolyte outlet flow channel.
The inclined angle between the surface C of the liquid guide plate, which is close to one side of the copper plate, and the horizontal plane is 10-30 degrees.
When the zinc-bromine flow battery is assembled, the surfaces of the liquid guide plates at the two ends of the battery pack, which are parallel to the horizontal plane, are tightly attached to the end plates, and the plane, with an inclined angle, of the liquid guide plates and the horizontal plane is tightly attached to the copper plate;
After the zinc-bromine flow battery is assembled, the direction from the inlet flow channel of the negative electrode frame to the outlet flow channel of the negative electrode frame is provided with a downward inclined angle; the direction from the inlet flow channel of the positive electrode frame to the outlet flow channel of the positive electrode frame has a downward inclined inclination angle.
Bipolar plates are arranged between adjacent single cells, and the upper end and the lower end of the battery pack are provided with the bipolar plates.
Compared with the prior art, the utility model has the following beneficial effects:
According to the utility model, the liquid guide plates at the two ends of the zinc-bromine flow battery are provided with a certain inclination angle, so that after the battery is assembled, the inlet flow channel to the outlet flow channel of the negative electrode frame and the positive electrode frame have a certain inclination angle. When the battery is stopped and placed, positive and negative electrolyte in the positive electrode and the negative electrode can flow out of the galvanic pile from the carbon felt electrode through the outlet flow passage under the action of gravity, so that the liquid storage amount of the carbon felt electrode is reduced, the water corrosion of zinc can be reduced at the negative electrode side, and the self-discharge of the zinc-bromine flow battery is inhibited; and the bromine concentration in the carbon felt electrode is reduced at the positive electrode side, so that the permeation of bromine molecules during the storage of the battery is reduced, and the self-discharge of the battery is further inhibited.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings to which the embodiments relate will be briefly described.
Fig. 1 is a side view of a liquid guide plate of the present utility model.
Fig. 2 is a top view of the liquid guiding plate of the present utility model.
Fig. 3 is a top view of the copper plate of the present utility model.
Fig. 4 is a zinc-bromine flow battery structure of the present utility model. Wherein 1 is a battery end plate, 2 is a battery liquid guide plate, 3 is a battery copper plate, 4 is a single battery of the utility model, wherein a negative electrode frame, a diaphragm and a positive electrode frame are sequentially arranged, 5 is a bipolar plate, and every two single batteries are sequentially stacked through the bipolar plate in series.
Detailed Description
The following detailed description of the utility model is provided in connection with examples, but the implementation of the utility model is not limited thereto, and it is obvious that the examples described below are only some examples of the utility model, and that it is within the scope of protection of the utility model to those skilled in the art to obtain other similar examples without inventive faculty.
The embodiment of the utility model relates to a zinc-bromine flow battery structure for inhibiting self-discharge, which is a battery pack formed by overlapping more than two single batteries from top to bottom in series (liquid paths and circuits are all in series), wherein the single batteries mainly comprise an annular negative electrode frame, a diaphragm and an annular positive electrode frame, wherein the annular negative electrode frame is provided with a through hole for accommodating an electrode at the middle part, and the annular positive electrode frame is provided with a through hole for accommodating the electrode at the middle part; the negative electrode is arranged in the through hole in the middle of the annular negative electrode frame, and the positive electrode is arranged in the through hole in the middle of the annular positive electrode frame; through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame; grooves (on the right side) serving as a negative electrolyte inlet runner (on the left side) and a negative electrolyte outlet runner are respectively arranged on one side surface A of the negative electrode frame, which is close to the diaphragm, and on two opposite sides (namely the left side and the right side of the surface A) of the rectangular through hole; grooves (on the right side) serving as an anode electrolyte inlet runner (on the left side) and an anode electrolyte outlet runner (on the right side) are respectively arranged on one side surface B of the anode electrode frame, which is close to the diaphragm, and on two opposite sides (namely the left side and the right side of the surface B) of the rectangular through hole; through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame; the negative electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the negative electrode frame, and the negative electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the negative electrode frame; the positive electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the positive electrode frame, and the positive electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the positive electrode frame; copper plates, liquid guide plates and end plates are respectively arranged at the upper end and the lower end of the battery pack in a direction away from the battery pack; the end plate is a rectangular flat plate with upper and lower surfaces parallel, and the surfaces of the end plate are parallel to a horizontal plane; the copper plate is a rectangular flat plate with the upper surface and the lower surface parallel, and the surfaces of the rectangular flat plate are parallel to the horizontal plane; the method is characterized in that: the liquid guide plate is a wedge hexahedron, one side surface of the liquid guide plate, which is close to the end plate, is a plane parallel to the horizontal plane, and the opposite side surface C, which is close to the copper plate, is a plane with a certain inclination angle with the horizontal plane; rectangular with the same shape and size and the parallel left and right side surfaces of the wedge-shaped hexahedron, and rectangular trapezoids with the same shape and size and the parallel front and rear side surfaces of the wedge-shaped hexahedron; and the horizontal plane position D of one end (left end) of the liquid guide plate surface C close to the negative electrode electrolyte inlet flow channel and the positive electrode electrolyte inlet flow channel is higher than the horizontal plane position E of one end (right end) of the liquid guide plate surface C close to the negative electrode electrolyte outlet flow channel and the positive electrode electrolyte outlet flow channel. The inclined angle between the surface C of the liquid guide plate, which is close to one side of the copper plate, and the horizontal plane is 10-30 degrees. When the zinc-bromine flow battery is assembled, the surfaces of the liquid guide plates at the two ends of the battery pack, which are parallel to the horizontal plane, are tightly attached to the end plates, and the plane, with an inclined angle, of the liquid guide plates and the horizontal plane is tightly attached to the copper plate; after the zinc-bromine flow battery is assembled, the direction from the inlet flow channel of the negative electrode frame to the outlet flow channel of the negative electrode frame is provided with a downward inclined angle; the direction from the inlet flow channel of the positive electrode frame to the outlet flow channel of the positive electrode frame has a downward inclined inclination angle. Bipolar plates are arranged between adjacent single cells, and the upper end and the lower end of the battery pack are provided with the bipolar plates.
The electrolyte is an aqueous solution of 2mol/l zinc bromide solution, 3mol/l potassium chloride solution and 0.4mol/l MEP complexing agent. The membrane is a commercial Daramic porous membrane; areas of the negative carbon felt electrode and the positive carbon felt electrode are respectively: 800cm 2
Comparative example 1
Comparative example 1 a zinc bromine flow battery was assembled using a conventional structure. The battery liquid guide plate is of a horizontal structure and has no inclination angle. The specific electrode size, the number of cell stacks and the charge-discharge system are as follows:
Electrode area: 800cm 2;
Number of stack (number of unit cells): 10 sections;
Current density: 40mA/cm 2, charging time: 3 hours, discharge cut-off voltage: 8V, shelf time: 24 hours;
battery cycle performance: coulomb efficiency 91.3%, voltage efficiency 83.3%, energy efficiency 76.1%;
battery rest performance: coulomb efficiency 75.4%, voltage efficiency 70.3%, energy efficiency 53.0%;
Comparative example 2
Comparative example 2a zinc-bromine flow battery was assembled using the above structure. The inclination angle of the battery liquid guide plate is 5 degrees. The specific electrode size, the number of cell stacks and the charge-discharge system are as follows:
Electrode area: 800cm 2;
Number of stack (number of unit cells): 10 sections;
current density: 40mA/cm 2, charging time: 3 hours, discharge cut-off voltage: 8V; the rest time is as follows: 24 hours;
Battery cycle performance: coulomb efficiency 90.1%, voltage efficiency 82.3%, energy efficiency 74.2%;
Battery rest performance: coulomb efficiency 77.2%, voltage efficiency 73.4%, energy efficiency 56.7%; comparative example 3
Comparative example 3 a zinc-bromine flow battery was assembled using the above structure. The inclination angle of the battery liquid guide plate is 40 degrees. The specific electrode size, the number of cell stacks and the charge-discharge system are as follows:
Electrode area: 800cm 2;
Number of stack (number of unit cells): 10 sections;
current density: 40mA/cm 2, charging time: 3 hours, discharge cut-off voltage: 8V; the rest time is as follows: 24 hours;
Battery cycle performance: coulomb efficiency 88.3%, voltage efficiency 79.5%, energy efficiency 70.2%;
Battery rest performance: coulomb efficiency 79.4%, voltage efficiency 72.5%, energy efficiency 57.6%;
Example 1
Example 1a zinc bromine flow battery was assembled using the above structure. The inclination angle of the battery liquid guide plate is 15 degrees. The specific electrode size, the number of cell stacks and the charge-discharge system are as follows:
Electrode area: 800cm 2;
Number of stack (number of unit cells): 10 sections;
current density: 40mA/cm 2, charging time: 3 hours, discharge cut-off voltage: 8V; the rest time is as follows: 24 hours;
battery cycle performance: coulomb efficiency 90.8%, voltage efficiency 82.3%, energy efficiency 74.7%;
battery rest performance: coulomb efficiency 82.5%, voltage efficiency 74.6%, energy efficiency 61.5%;
Example 2
Example 2 a zinc bromine flow battery was assembled using the above structure. The inclination angle of the battery liquid guide plate is 25 degrees. The specific electrode size, the number of cell stacks and the charge-discharge system are as follows:
Electrode area: 800cm 2;
Number of stack (number of unit cells): 10 sections;
current density: 40mA/cm 2, charging time: 3 hours, discharge cut-off voltage: 8V; the rest time is as follows: 24 hours;
Battery cycle performance: coulomb efficiency 92.9%, voltage efficiency 83.8%, energy efficiency 77.9%;
Battery rest performance: coulomb efficiency 83.1%, voltage efficiency 76.6%, energy efficiency 63.6%;
the comparative example 1 adopts the traditional structure to assemble the zinc-bromine flow battery, and can be seen that the battery has very low shelving performance after charging for 3 hours, because a large amount of electrolyte is stored in a carbon felt of the positive electrode and the negative electrode when the battery is shelved, and water corrosion is generated on the negative electrode, the electrolyte and zinc, so that the capacity loss of the zinc is caused; in the positive electrode, bromine molecules penetrate through the diaphragm to chemically react with zinc simple substance of the negative electrode, so that active substances are consumed, and the capacity of the battery is lost; in the comparative example 2, the zinc-bromine flow battery structure provided by the utility model is adopted, but the inclination angle of the liquid guide plate is smaller, so that electrolyte cannot flow out of an electrode completely when the battery is placed, and severe self-discharge also occurs, but the placing performance is higher compared with that of the comparative example 1; in the comparative example 3, the inclination angle of the liquid guide plate is larger, and the electrolyte can be ensured to completely flow out of the electrode when the battery is placed, but in the normal charge-discharge cycle process, the distribution uniformity of the electrolyte in the electrode is poor due to the overlarge inclination angle, so that the polarization of the battery is larger, the voltage efficiency is lower, and the performance of the battery in normal operation is affected.
In the embodiment 1, compared with the comparative example, the zinc-bromine flow battery structure provided by the utility model has the advantages that the shelf performance is obviously improved, because the electrolyte can flow out of the electrode under the action of gravity when the battery is placed due to the inclination angle of the liquid guide plate, the problems of zinc corrosion of the negative electrode and permeation of positive bromine molecules are inhibited, and the shelf performance of the battery is improved; example 2 shows that after the inclination angle is increased, the resting performance is improved to a certain extent, and the normal charge-discharge cycle performance of the battery is also improved to a certain extent, because the electrode frame has a certain inclination angle, the flow rate of electrolyte is increased, the polarization of the battery is reduced, and the voltage efficiency of the battery is improved. Meanwhile, compared with comparative example 3, the inclination angle of example 2 is not too large, so that the flow uniformity of the electrolyte can be ensured, the flow rate of the electrolyte can be increased, and the performance of the battery can be improved.
Claims (4)
1. A zinc bromine flow battery structure for restraining self discharge is composed of a battery pack formed by overlapping more than two single batteries in series from top to bottom, wherein a liquid path and a circuit are all in series connection, and each single battery mainly comprises an annular negative electrode frame, a diaphragm and an annular positive electrode frame, wherein the annular negative electrode frame is provided with a through hole for accommodating an electrode in the middle part, and the annular positive electrode frame is provided with a through hole for accommodating the electrode in the middle part; the negative electrode is arranged in the through hole in the middle of the annular negative electrode frame, and the positive electrode is arranged in the through hole in the middle of the annular positive electrode frame;
Through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame; grooves which are positioned at the left side and used as a negative electrolyte inlet runner and positioned at the right side and used as a negative electrolyte outlet runner are respectively arranged on the surface A of one side of the negative electrode frame, which is close to the diaphragm, and at the opposite sides of the rectangular through hole, namely the left side and the right side of the surface A;
Grooves which are positioned at the left side and serve as an anode electrolyte inlet runner and a cathode electrolyte outlet runner at the right side are respectively arranged on the surface B of one side of the anode electrode frame, which is close to the diaphragm, and are opposite to two sides of the rectangular through hole, namely the left side and the right side of the surface B;
Through holes serving as a cathode electrolyte inlet common runner, a cathode electrolyte outlet common runner, an anode electrolyte inlet common runner and an anode electrolyte outlet common runner are respectively arranged on the cathode electrode frame and the anode electrode frame;
The negative electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the negative electrode frame, and the negative electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the negative electrode frame; the positive electrode electrolyte inlet common runner is connected with the electrolyte inlet runner of the positive electrode frame, and the positive electrode electrolyte outlet common runner is connected with the electrolyte outlet runner of the positive electrode frame;
Copper plates, liquid guide plates and end plates are respectively arranged at the upper end and the lower end of the battery pack in a direction away from the battery pack;
the end plate is a rectangular flat plate with upper and lower surfaces parallel, and the surfaces of the end plate are parallel to a horizontal plane;
The copper plate is a rectangular flat plate with the upper surface and the lower surface parallel, and the surfaces of the rectangular flat plate are parallel to the horizontal plane;
The method is characterized in that:
The liquid guide plate is a wedge hexahedron, one side surface of the liquid guide plate, which is close to the end plate, is a plane parallel to the horizontal plane, and the opposite side surface C, which is close to the copper plate, is a plane with a certain inclination angle with the horizontal plane; rectangular with the same shape and size and the parallel left and right side surfaces of the wedge-shaped hexahedron, and rectangular trapezoids with the same shape and size and the parallel front and rear side surfaces of the wedge-shaped hexahedron;
And the horizontal plane position D of the surface C of the liquid guide plate close to the negative electrode electrolyte inlet flow channel and the positive electrode electrolyte inlet flow channel, namely the left end of the C, is higher than the horizontal plane position E of the surface C of the liquid guide plate close to the negative electrode electrolyte outlet flow channel and the positive electrode electrolyte outlet flow channel, wherein D is above E.
2. The battery structure of claim 1, wherein:
The inclined angle between the surface C of the liquid guide plate, which is close to one side of the copper plate, and the horizontal plane is 10-30 degrees.
3. A battery structure according to claim 1 or 2, characterized in that:
When the zinc-bromine flow battery is assembled, the surfaces of the liquid guide plates at the two ends of the battery pack, which are parallel to the horizontal plane, are tightly attached to the end plates, and the plane, with an inclined angle, of the liquid guide plates and the horizontal plane is tightly attached to the copper plate;
After the zinc-bromine flow battery is assembled, the direction from the inlet flow channel of the negative electrode frame to the outlet flow channel of the negative electrode frame is provided with a downward inclined angle; the direction from the inlet flow channel of the positive electrode frame to the outlet flow channel of the positive electrode frame has a downward inclined inclination angle.
4. A battery structure according to claim 1 or 2, characterized in that:
Bipolar plates are arranged between adjacent single cells, and the upper end and the lower end of the battery pack are provided with the bipolar plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322568644.8U CN220914274U (en) | 2023-09-21 | 2023-09-21 | Zinc bromine flow battery structure capable of inhibiting self-discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322568644.8U CN220914274U (en) | 2023-09-21 | 2023-09-21 | Zinc bromine flow battery structure capable of inhibiting self-discharge |
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| CN220914274U true CN220914274U (en) | 2024-05-07 |
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| CN202322568644.8U Active CN220914274U (en) | 2023-09-21 | 2023-09-21 | Zinc bromine flow battery structure capable of inhibiting self-discharge |
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2023
- 2023-09-21 CN CN202322568644.8U patent/CN220914274U/en active Active
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