CN109088094A - Sedimentary slurry energy storage battery with stirring structure - Google Patents
Sedimentary slurry energy storage battery with stirring structure Download PDFInfo
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- CN109088094A CN109088094A CN201810904191.2A CN201810904191A CN109088094A CN 109088094 A CN109088094 A CN 109088094A CN 201810904191 A CN201810904191 A CN 201810904191A CN 109088094 A CN109088094 A CN 109088094A
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/4214—Arrangements for moving electrodes or electrolyte
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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
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a deposition type slurry energy storage battery with a stirring structure, which comprises an electrochemical reactor and an auxiliary structure, wherein the auxiliary structure is arranged in a chamber of the electrochemical reactor and is used for assisting slurry to move; through setting up auxiliary structure assists the thick liquids motion in the electrochemistry chamber for its electrochemistry environment of active material granule is constantly changed in electrochemical reaction in-process, thereby solves the inhomogeneous problem of battery active material electrochemistry environment, and then plays the electrochemistry polarization and the negative pole material dendritic crystal problem that improve the battery.
Description
Technical Field
The invention relates to the technical field of sedimentary slurry energy storage batteries with stirring structures, in particular to a stirring structure suitable for sedimentary slurry energy storage batteries with stirring structures and a sedimentary slurry energy storage battery with a stirring structure.
Background
Manufacturing an electrode of a lithium ion battery, wherein positive electrode slurry comprises an adhesive, a conductive agent, a positive electrode material and the like; the negative electrode slurry is composed of a binder, graphite carbon powder and the like. The preparation of the positive electrode slurry and the negative electrode slurry comprises a series of processes of mixing, dissolving, dispersing and the like between liquid and between liquid and solid materials, and the processes are accompanied with changes of temperature, viscosity, environment and the like. In the positive electrode slurry and the negative electrode slurry, the dispersibility and the uniformity of the granular active substances directly affect the movement of lithium ions between two electrodes of the battery, so that the mixing and the dispersion of the slurry of each pole piece material are very important in the production of the lithium ion battery, and the quality of the dispersion of the slurry directly affects the quality of the subsequent production of the lithium ion battery and the performance of products thereof. The semi-solid state flow battery is a novel battery structure combining the flow battery and the lithium ion battery, adopts the structure of the flow battery and the solid active substance, has the advantages of the flow battery such as power and capacity separation characteristic and high specific energy density of the solid active substance, and is concerned by academia and industry.
However, in the prior art, there is a contradiction between the fluidity of the suspension and the solid content of the suspension adopted by the semi-solid flow battery, and the increase of the overall energy density requires the increase of the solid content of the electrolyte, but the fluidity of the electrolyte is deteriorated, and if the solid content is low, not only the energy density is greatly reduced, but also the overall conductivity of the electrode is low, and large polarization is caused in the reaction process. Secondly, the stability of the suspension is difficult to guarantee, and local sedimentation is easily formed to block flow channels and membranes, which greatly increases the difficulty of equipment design and manufacture. However, if the slurry is completely static during operation, the electrochemical environment of the active material in different regions of the electrode will be greatly different, which may lead to increased device polarization and possible dendrite problems.
Therefore, the sedimentary slurry energy storage battery with the stirring structure is provided, which can ensure the energy density and does not have contradiction between the fluidity and the solid content.
Disclosure of Invention
The invention aims to provide a stirring structure suitable for a deposition type slurry energy storage battery with a stirring structure and the deposition type slurry energy storage battery with the stirring structure.
In order to achieve the above object, the invention provides a deposition type slurry energy storage battery with a stirring structure, which comprises an electrochemical reactor, and further comprises an auxiliary structure arranged in a chamber of the electrochemical reactor to assist the movement of slurry, wherein the auxiliary structure comprises a stirring structure.
The stirring structure comprises electromagnets arranged at two ends of the cavity and magnetons arranged in the cavity; and the electromagnets at the two ends are switched between power-on and power-off according to a driving working system, and the magnetons move under the action of the magnetic field of the electromagnets to stir the slurry in the cavity.
The magnetons are made of iron, cobalt, nickel or ferrite and other magnetic materials, and the magnetic characters comprise one or more different diameters, and the diameter range of the magnetic characters is 10 mu m-1mm.
The surface of the magneton is coated with a layer of insulating coating.
The electrochemical reactor comprises a positive electrode cavity, a negative electrode cavity, a diaphragm arranged between the positive electrode cavity and the negative electrode cavity, a positive electrode current collector and a negative electrode current collector.
The heat dissipation structure is used for dissipating heat of the cavity.
The heat radiation structure comprises a heat radiation fin which is arranged outside the cavity and connected with the positive current collector and the negative current collector.
The radiating fin is connected with the positive current collector and/or the negative current collector through welding, gluing or mechanical contact, and the joint is sealed by adopting insulating glue; or the heat sink is integrally manufactured with the positive electrode current collector and/or the negative electrode current collector.
The driving working system comprises the following steps: during stirring, the electromagnet at the first end of the chamber is electrified, the electromagnet at the second end of the chamber is powered off, the magnetons move under the action of a magnetic field and reach the first end, then the electromagnet at the first end is powered off, the electromagnet at the second end of the chamber is powered on, and the magnetons move reversely under the action of the magnetic field and reach the second end; and then the cycle repeats.
The auxiliary structure further comprises a vibrating structure.
Compared with the prior art, the invention has the following advantages:
in the invention, the auxiliary structure is arranged to assist the movement of the slurry in the electrochemical cavity, so that the electrochemical environment of active material particles is continuously changed in the electrochemical reaction process, the problem of uneven electrochemical environment of the active material of the battery is solved, and the electrochemical polarization and the dendritic crystal problem of a negative electrode material of the battery are improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic cross-sectional view of an electromagnetic sedimentary slurry energy storage cell with a stirring structure according to the present invention;
FIG. 2 is a partial structural diagram of an electromagnetic deposition type slurry energy storage battery with a stirring structure according to the present invention;
FIG. 3 is a schematic diagram of a partially disassembled structure of an electromagnetic deposition type slurry energy storage battery with a stirring structure according to the present invention;
FIG. 4 is a schematic cross-sectional view of a composite diaphragm according to the present invention;
description of the attached labels: 1-positive current collector; 2-positive electrode leading-out end; 3-a positive electrode chamber; 4-negative current collector; 5-a negative leading-out end; 6-a negative electrode chamber; 7-a composite membrane; 8-a heat sink; 9-magneton; 10-an electromagnet; 11-a feed inlet; 12-a discharge hole; 13-positive plate frame; 14-negative plate frame; 15-diaphragm plate frame; 16-an isolation layer; 17-a conductive layer; 18-insulating coating.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
As shown in fig. 1, 2 and 3, the embodiment provides a deposition type slurry energy storage battery with a stirring structure, which includes an electrochemical reactor, and further includes an auxiliary structure disposed in a chamber of the electrochemical reactor to assist in the movement of slurry, where the auxiliary structure includes a stirring structure.
In this embodiment, through setting up the auxiliary structure comes the assistance to the thick liquids motion in the electrochemistry chamber for its electrochemistry environment of active material granule is constantly changed in electrochemical reaction in-process, thereby solves the inhomogeneous problem of battery active material electrochemistry environment, and then plays the electrochemistry polarization and the negative pole material dendrite problem that improve the battery.
The stirring structure comprises electromagnets 10 arranged at two ends of the cavity and magnets 9 arranged in the cavity; the electromagnets 10 at the two ends are switched on and off according to a driving working system, and the magnetons 9 move under the action of the magnetic fields of the electromagnets 10 to stir the slurry in the cavity.
In the embodiment, the electromagnet 10 at the two ends is switched on and off to switch the magnetic field, so that the magnetons 9 run in different directions, and the stirring purpose is achieved; meanwhile, intermittent stirring can be optimized, energy consumption is reduced, and the influence on the output power of the device is small.
In the embodiment, the active slurry enters through the feed port 11, and is discharged through the discharge port 12 after reaction, and the active slurry does not need to flow in a chamber or a pipeline, so that the circulation resistance of the active slurry is greatly reduced, the energy storage efficiency of an energy storage system is improved, and the electrochemical reactor can adopt a narrow flow channel design; the active materials in the electrochemical reactor have high stacking density, and the internal resistance and polarization phenomena are far smaller than those of the lithium ion flow battery.
On the basis of the above, the magnetons 9 are made of iron, cobalt, nickel or ferrite and other magnetic materials, and the magnetons include one or more different diameters, and the diameter range is 10 μm-1mm. In this embodiment, the magneton 9 is preferably a steel ball, and the diameter thereof is set to be 0.3mm. In a preferred embodiment, the surface of the magneton 9 is coated with an insulating coating to prevent the steel balls from directly contacting with the active material or the electrolyte.
Specifically, the electrochemical reactor comprises a positive electrode chamber 3, a negative electrode chamber 6, a diaphragm arranged between the positive electrode chamber 3 and the negative electrode chamber 6, and a positive electrode current collector 1 and a negative electrode current collector 4. The electrochemical reactor is a plate structure or a tubular structure or is formed by laminating a plurality of sub-electrochemical reactors, and the electrochemical reactor can be designed into other structures.
On the basis, the embodiment further comprises a heat dissipation structure for dissipating heat of the cavity. Specifically, the heat radiation structure comprises a heat radiation fin 8 which is arranged outside the cavity and connected with the positive current collector 1 and the negative current collector 4. In this embodiment, the positive electrode current collector 1 and/or the negative electrode current collector 4 may be optionally extended to the outside of the electrochemical reactor. In this embodiment, the heat dissipation structure can timely extract internal heat in the electrochemical reactor, and the electrochemical environment and the temperature environment in which the active slurry is extracted in the working process are obviously superior to those of a semi-solid flow battery, so that the heat dissipation structure has higher safety and longer service life.
Specifically, the heat sink 8 is connected with the positive current collector 1 and/or the negative current collector 4 by welding, gluing or mechanical contact, and the joint is sealed by using an insulating glue; or the heat sink 8 is integrally manufactured with the positive electrode current collector 1 and/or the negative electrode current collector 4.
In this embodiment, as a preferred embodiment, the driving operation system is: during stirring, the electromagnet 10 at the first end of the chamber is powered on, the electromagnet 10 at the second end of the chamber is powered off, the magnetons 9 move under the action of a magnetic field and reach the first end, then the electromagnet 10 at the first end is powered off, the electromagnet 10 at the second end of the chamber is powered on, and the magnetons 9 move in a reverse direction under the action of the magnetic field and reach the second end; then the operation is repeated circularly; of course, other drive regimes may be selected.
On the basis, the diaphragm in the embodiment is a composite diaphragm 7 made of one or more materials of a porous polymer film, a porous ceramic diaphragm, non-woven fabrics, various fabrics, fiber paper, a metal mesh, a carbon fiber mesh, a carbon felt, a polymer felt and the like.
As shown in fig. 4, the composite diaphragm 7 includes an isolation layer 16, a conductive layer 17 disposed on both sides of the isolation layer 16, and an insulating coating 18 disposed between the conductive layer 17 and the isolation layer 16; the conductive layer 17, the insulating coating 18, the isolation layer 16, the insulating coating 18 and the conductive layer 17 are sequentially stacked and bonded into a whole, and a gap between every two adjacent layers is not more than 10 micrometers.
In this embodiment, the conductive composite membrane 7 is formed by two conductive layers 17 and one isolation layer 16, and the insulating coating 18 is disposed between the conductive layers 17 and the isolation layer 16, so that one side of the conductive layer 17 close to the isolation layer 16 is in a state of being coated by the insulating coating 18, thereby preventing ions from producing dendrites between the conductive layer 17 and the isolation layer 16, preventing the isolation layer 16 from being pricked, and improving the safety performance of a battery system; meanwhile, the conductive composite diaphragm 7 realizes the integration of the isolation layer 16 and the conductive layer 17, simplifies the battery structure of the fluidized slurry battery, improves the utilization rate of the internal volume of the battery, and improves the mechanical strength and the service life of the conductive composite diaphragm 7.
Specifically, the thickness of the insulating coating 18 of the present embodiment is 0.1 to 50 μm; wherein, two adjacent layers adopt vacuum evaporation plating or electroplating or chemical plating or casting or spin coating or spray coating or hot pressing or screen printing or ink-jet printing or bonding or mechanical pressing to be compounded into a whole, thereby ensuring that the conductive layer 17 and the isolation layer 16 can be tightly jointed to form the conductive composite diaphragm 7 and ensuring that the gap between the two adjacent layers is not more than 10 μm.
Specifically, in the present embodiment, the isolation layer 16 is made of polyethylene, polypropylene, polyvinylidene fluoride, or other electronically nonconductive porous polymer material;
as an alternative embodiment, the isolation layer 16 can also be made of glass fiber non-woven fabric, synthetic fiber non-woven fabric, ceramic fiber paper, or other electronic non-conductive inorganic non-metallic material and organic polymer composite porous material;
further, as an alternative embodiment, the isolation layer 16 may be a gel polymer electrolyte composite material formed by compounding an electronically nonconductive polymer matrix, a liquid organic plasticizer, and a lithium salt.
On the basis of the above embodiments, the conductive layer 17 of the present embodiment is a conductive layer 17 formed by mechanically stamping or chemically etching a metal sheet or a metal foil having multiple through holes, where the through holes are in a circular shape, an oval shape, a semicircular shape, a square shape, a hexagonal shape, a triangular shape, a diamond shape, a trapezoid shape, or an irregular polygon shape; wherein the surface of the metal thin plate or the metal foil is coated with a conductive carbon material coating; when the conductive layer 17 is used for a positive current collector, the metal sheet or metal foil is a metal sheet or metal foil made of aluminum, aluminum alloy, stainless steel, silver, tin, nickel, or titanium; when the conductive layer 17 is used for a negative current collector, the metal thin plate or the metal foil is a metal thin plate or a metal foil made of copper, stainless steel, nickel, titanium, silver, tin-plated copper, nickel-plated copper, or silver-plated copper.
As a switchable embodiment, the conductive layer 17 may also be an electronic conductive layer 17 having a plurality of through holes, the electronic conductive layer 17 is a conductive layer 17 made of one or more of porous polyester fiber conductive cloth, carbon fiber conductive cloth, and metal wire and organic fiber mixed conductive cloth, or the electronic conductive layer 17 is a conductive layer 17 made of an organic material with a conductive carbon material coating or a metal film coated on the surface, the organic material including natural cotton, polyester, aramid, nylon, polypropylene, polyethylene, polytetrafluoroethylene, and other organic substances with good electrolyte resistance; the through holes are circular, oval, semicircular, square, hexagonal, triangular, rhombic, trapezoidal or irregular polygons.
As another alternative embodiment, the conductive layer 17 may be a conductive layer 17 having a single-layer mesh structure or a multi-layer mesh structure woven with conductive fibers, or the conductive layer 17 may be a foamed metal conductive layer 17 having a plurality of through holes; the through holes are circular, oval, semicircular, square, hexagonal, triangular, rhombic, trapezoidal or irregular polygons.
Further, the through hole of the conductive layer 17 of the present embodiment is filled with an insulating porous material, a gel polymer electrolyte plasma conductor material, thereby preventing an active slurry from entering the through hole of the conductive layer 17, and further improving the safety of the separator layer.
In this embodiment, it is preferable that the insulating coating 18 is physically and chemically coated on the side of the conductive layer 17 close to the insulating layer; wherein, the coating of the insulating coating 18 is provided by organic polymer material or inorganic ceramic material or other insulating material, the physical method comprises mechanical coating or electroplating or local soaking or vapor deposition method or laser, and the chemical method comprises electron beam surface treatment or thermal spraying.
Of course, as an alternative embodiment, the insulating coating 18 may also completely coat the conductive layer 17 by physical and chemical methods, and the side of the conductive layer 17 close to the slurry is cleaned by polishing, heat treatment, and chemical corrosion to expose the coating of the insulating coating 18;
wherein, the coating of the insulating coating 18 is provided by organic polymer material or inorganic ceramic material or other insulating material, the physical method comprises mechanical coating or electroplating or local soaking or vapor deposition method or laser, and the chemical method comprises electron beam surface treatment or thermal spraying; and then the insulating coating 18 close to one side of the slurry is removed by physical and chemical means such as polishing, heat treatment, chemical corrosion and the like, so that the conductive layer 17 is exposed.
On the basis of the above, the positive electrode current collector 1 and the negative electrode current collector 4 in the present embodiment may be made of one or more of filament, mesh, plate, rod, foam sponge, and fiber, depending on the energy storage active material in the active slurry; the positive electrode current collector 1 and the negative electrode current collector 4 may have the same structure or different materials.
Further, it is preferable that the energy storage active material in the active paste according to this embodiment is a particulate solid; the fixed shape of the particles is one or a mixture of a plurality of porous microsphere structures sintered by spherical, cylindrical, irregular flaky and tiny particles.
The active slurry is composed of energy storage active substances, electrolyte, additives and the like, the energy storage active substances can be selected to have polydisperse particle size distribution, and the proportion of the energy storage active substances with different particle sizes is determined according to the slurry state required by the device. In this embodiment, the solid content of the active slurry is preferably 50% or more.
Furthermore, the energy storage active substance, the electrolyte and the additive can be selected from the anode and the cathode of the existing commercial battery system and the electrolyte material according to actual requirements. The energy storage active material can be selected from lithium ion battery material systems, such as: lithium cobaltate/lithium titanate/lithium salt carbonate, lithium manganate/carbon/lithium salt carbonate, lithium iron phosphate/carbon/lithium salt carbonate, and the like. The energy storage active substance can be selected from a lead-acid battery system, such as lead dioxide/metallic lead/lead methylsulfonate aqueous solution, lead dioxide/metallic lead/dilute sulfuric acid and the like. The energy storage active material can also be selected from zinc-nickel battery systems, such as: nickel dioxide/metallic zinc and zinc alloy/soluble zincate acidic aqueous solution, nickel dioxide/metallic zinc and zinc alloy/soluble zincate alkaline aqueous solution. The energy storage active material can also be selected from active materials used in a zinc-manganese battery system and an iron-nickel battery system. Or the energy storage active material can also be selected from a mixed system of the above multiple electric pairs or a newly discovered active material electric pair system.
As a preferred embodiment, a functional additive may also be added to the energy storage active material. Wherein, the functional additive can be one or more of conductive agent, thickening agent, antioxidant, SEI film improving additive, flame retardant additive, etc.
The auxiliary structure further comprises a vibrating structure.
In this embodiment, the slurry is a deposition type slurry, and the slurry includes a mixture of at least an energy storage active material and an electrolyte, where the energy storage active material is energy storage particles, and the energy storage particles in the deposition type slurry are stacked and contacted with each other; the energy storage particles in the deposition type slurry and the conductive agent cooperate to form a conductive network, so that current is transmitted to a current collector through the conductive network and is led out from the positive electrode and the negative electrode to form an electronic loop; ion exchange occurs between the surface of the energy storage particles of the deposition type slurry and the electrolyte in the deposition type slurry, and ions are dissociated through the accumulation gaps among the energy storage particles of the deposition type slurry and penetrate through the diaphragm structure to form an ion loop.
Example 2
On the basis of embodiment 1, this embodiment provides a specific deposition type slurry energy storage battery with a stirring structure, as follows:
the installed capacity is designed to be 750kwh, and the maximum power is designed to be 1mw. The whole device is about 0.8m high and occupies 2m of land 2 On the left and right sides, the volume energy density of the device is about 469wh/L, which is basically consistent with the volume energy density of the current lithium ion battery. The device stirs the thick liquids intermittently in high-power charge-discharge process to stir the thick liquids after single charge-discharge circulation finishes.
The electrochemical reactor of the device has an inner length and width of 83cm × 200cm × 30cm, and specifically, as shown in fig. 3, grooves are engraved in the upper and lower casings. Wherein, the positive current collector 1 adopts a 100-mesh metal aluminum mesh, the negative current collector 4 adopts a 100-mesh metal copper mesh, and the diameters of the metal aluminum mesh and the metal copper mesh are 0.5mm. One side of the positive current collector 1 and one side of the negative current collector 4 are welded with the radiating fins 8 with the thickness of 0.5 mm; specifically, the heat sink 8 is made of copper metal, has a size of 50cm × 20cm, and has a surface coated with an insulating paint. The diaphragm is a porous PE diaphragm for an ion battery, wherein the aperture is about 0.08 mu m, and the thickness of the diaphragm is 50 mu m. The positive electrode current collector 1, the negative electrode current collector 4 and the diaphragm are combined with the corresponding positive plate frame 13, the negative plate frame 14 and the diaphragm plate frame 15 to form a positive plate, a negative plate and a diaphragm plate, the positive plate frame 13, the negative plate frame 14 and the diaphragm plate, and the joint of the positive plate frame 13, the negative plate frame 14 and the diaphragm plate is sealed by adopting insulating glue. Just, negative plate and diaphragm plate assemble according to the order of negative plate, diaphragm plate, positive plate, diaphragm plate, and the positive plate is 1000 pieces altogether, and the negative plate attacks 1001 pieces, and the diaphragm is 1000 pieces altogether, and each board interval is 1mm, and the kneck is sealed with the insulating cement, at the metal filter screen of 200 meshes of business turn over discharge gate 12 installation, shell about the installation to with the bolt lock die.
After the electrochemical reactor is installed, a certain amount of electrolyte is poured into the electrochemical reactor to wet the chamber, and then the magnetons 9 are added from the feed port 11. Specifically, about 10000 particles are added into each negative electrode chamber 6, and 3000 particles are distributed in the positive electrode chamber. An electromagnet 10 is arranged on the upper and lower shells of the device; thereby completing the assembly of the device having the positive and negative terminals 2 and 5.
The device adopts deposition type slurry prepared by commercial lithium ion battery system materials in the market, wherein the positive electrode material adopts positive electrode active substance particles composed of spinel lithium manganate powder, graphite powder and a binder, the particle size is between 5 and 500 mu m, and the negative electrode material adopts negative electrode active substance particles composed of graphite material, copper powder and a binder, the particle size is between 5 and 500 mu m. The electrolyte adopts the carbonate added with the lithium-containing electrolyte, the materials are mixed and stirred into suspension type slurry, the suspension type slurry is respectively injected into corresponding cavities of the device and deposited to form deposition type slurry, the injection amount of the positive active slurry is 500L, the positive cavity 3 is filled with the positive active slurry, the injection amount of the negative active slurry is 500L, the negative cavity 6 is filled with the negative active slurry, and the gap of the feed inlet 11 is filled with the electrolyte, so that the whole system is isolated from the outside; the electromagnet 10 is started to enable the magnetons 9 and the slurry to be uniformly mixed.
The device has the advantages of large energy storage capacity at one time and low preparation precision. In the embodiment, the active substance and the electrolyte can be replaced, the separated active substance can be directly recovered, the recovery cost is greatly reduced, the requirement on the service life of the used active substance can also be greatly reduced, and the cheaper active substance can be used. The reaction device is separated from the active substance, and the service life of the whole system is greatly prolonged because the service life of the reaction device is far longer than that of the active substance, and only the active substance needs to be updated at lower cost and little maintenance is needed during work.
Meanwhile, compared with the traditional winding lamination or polar plate type energy storage battery, the device can save a large amount of diaphragm, positive and negative pole current collector materials, the volume energy density and the mass energy density of the battery are also obviously improved, and the battery preparation does not need expensive battery manufacturing equipment such as a coating machine, a slicing machine, a lamination machine and the like, so that the raw material cost and the manufacturing cost of the battery are greatly reduced, and compared with the current commercial lithium ion energy storage battery with the same scale, the cost of the device can be reduced by more than 30%.
It should be understood that the above embodiments are only examples for clarity of description, and are not limiting. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. Sedimentary slurry energy storage cell with stirring structure, it includes electrochemical reactor, its characterized in that: the slurry stirring device further comprises an auxiliary structure arranged in the cavity of the electrochemical reactor and used for assisting the slurry to move, and the auxiliary structure comprises a stirring structure.
2. The sedimentary slurry energy storage cell with stirring structure as claimed in claim 1, wherein: the stirring structure comprises electromagnets (10) arranged at two ends of the cavity and magnetons (9) arranged in the cavity; the electromagnets (10) at the two ends are switched on and off according to a driving working system, and the magnetons (9) move under the action of the magnetic fields of the electromagnets (10) to stir the slurry in the cavity.
3. The sedimentary slurry energy storage cell with stirring structure as claimed in claim 2, wherein: the magnetons (9) are made of iron, cobalt, nickel or ferrite and other magnetic materials (9), the magnetic characters comprise one or more different diameters, and the diameter range of the magnetic characters is 10 mu m-1mm.
4. The sedimentary slurry energy storage battery with the stirring structure as claimed in claim 3, wherein: the surface of the magneton (9) is coated with a layer of insulating paint.
5. The sedimentary slurry energy storage cell with stirring structure according to claim 3 or 4, characterized in that: the electrochemical reactor comprises a positive electrode cavity (3), a negative electrode cavity (6), a diaphragm arranged between the positive electrode cavity (3) and the negative electrode cavity (6), a positive electrode current collector (1) and a negative electrode current collector (4).
6. The sedimentary slurry energy storage battery with the stirring structure as claimed in claim 5, wherein: the heat dissipation structure is used for dissipating heat of the cavity.
7. The sedimentary slurry energy storage cell with stirring structure as claimed in claim 6, wherein: the heat radiation structure comprises a heat radiation fin (8) which is arranged outside the cavity and connected with the positive current collector (1) and the negative current collector (4).
8. The sedimentary slurry energy storage cell with agitation structure as claimed in claim 7, wherein: the radiating fin (8) is connected with the positive current collector (1) and/or the negative current collector (4) through welding, gluing or mechanical contact, and the joint is sealed by adopting insulating glue; or the radiating fin (8) and the positive electrode current collector (1) and/or the negative electrode current collector (4) are integrally manufactured.
9. The sedimentary slurry energy storage cell with stirring structure as claimed in claim 2, wherein: the driving working system comprises the following steps: during stirring, the electromagnet (10) at the first end of the chamber is electrified, the electromagnet (10) at the second end of the chamber is powered off, the magnetons (9) move under the action of a magnetic field and reach the first end, then the electromagnet (10) at the first end is powered off, the electromagnet (10) at the second end of the chamber is electrified, and the magnetons (9) move in the opposite direction under the action of the magnetic field and reach the second end; and then the cycle repeats.
10. The sedimentary slurry energy storage cell with stirring structure as claimed in claim 1, wherein: the auxiliary structure further comprises a vibrating structure.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113632283A (en) * | 2020-09-30 | 2021-11-09 | 宁德新能源科技有限公司 | Liquid battery and electronic device with same |
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| CN202454663U (en) * | 2012-03-01 | 2012-09-26 | 微宏动力系统（湖州）有限公司 | Current collector and battery pack adopting same |
| JP2014002941A (en) * | 2012-06-19 | 2014-01-09 | Sharp Corp | Battery |
| CN105008513A (en) * | 2012-12-19 | 2015-10-28 | 戴克斯纳有限责任公司 | Mixing apparatus and methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113632283A (en) * | 2020-09-30 | 2021-11-09 | 宁德新能源科技有限公司 | Liquid battery and electronic device with same |
| CN113632283B (en) * | 2020-09-30 | 2024-05-17 | 宁德新能源科技有限公司 | Liquid battery and electronic device with same |
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Application publication date: 20181225 |