CN116598571A - Bearing energy storage integrated fiber structure battery and 3D printing method thereof - Google Patents
Bearing energy storage integrated fiber structure battery and 3D printing method thereof Download PDFInfo
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- CN116598571A CN116598571A CN202310874981.1A CN202310874981A CN116598571A CN 116598571 A CN116598571 A CN 116598571A CN 202310874981 A CN202310874981 A CN 202310874981A CN 116598571 A CN116598571 A CN 116598571A
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- continuous fiber
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- fiber tows
- electrode active
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- 239000000835 fiber Substances 0.000 title claims abstract description 132
- 238000004146 energy storage Methods 0.000 title claims abstract description 27
- 238000010146 3D printing Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007773 negative electrode material Substances 0.000 claims abstract description 17
- 238000007639 printing Methods 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000007774 positive electrode material Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 39
- 239000005518 polymer electrolyte Substances 0.000 claims description 23
- 229920001169 thermoplastic Polymers 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000013543 active substance Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 2
- 229920001940 conductive polymer Polymers 0.000 claims description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 claims description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007598 dipping method Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/314—Preparation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
-
- 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
-
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- 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
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application discloses a battery with an integrated fiber structure for bearing and storing energy and a 3D printing method thereof, wherein a conductive continuous fiber tow is used as a current collector, a negative electrode active material is locked in the continuous fiber tow through dipping, drying and twisting, then a solid electrolyte is extruded and coated on the surface of the continuous fiber tow, and then the solid electrolyte mixed with a positive electrode active material is extruded and coated on the surface of the continuous fiber tow; and finally, the battery is subjected to a printing spray head, is compounded with insulating thermoplastic resin, and is extruded according to a printing path to form the battery with the complex structure and the integrated bearing and energy storage fiber structure. The technology can obviously improve the bearing capacity of the battery and realize the integrated design and manufacture of the bearing capacity and the energy storage function.
Description
Technical Field
The application belongs to the technical field of structural batteries, and particularly relates to a load-bearing energy-storage integrated fiber structure battery and a 3D printing method thereof.
Background
The structural battery has the electrochemical energy storage function, has the mechanical property of a structural member, is beneficial to reducing the weight of carrying equipment in the fields of aerospace, electric automobiles and the like, and has wide application prospect. However, the materials used in the traditional structural battery make the bearing performance of the whole structural battery weaker, and the requirements of high performance and light weight of components in the fields of aerospace, electric automobiles and the like are difficult to meet.
In recent years, with the deep research of multifunctional fiber composite materials, excellent mechanical properties of fibers and an energy storage function of a battery are combined, so that the multifunctional fiber composite material can bear larger load and store electric energy, effectively lighten weight, simplify structure and further improve the overall performance of the system, and becomes a new direction of domestic and foreign research. However, the existing fiber structure battery manufacturing method is complex, the fiber structure battery with a complex structure is difficult to manufacture, the design and manufacturing requirements of the fiber structure battery in the fields of aerospace, electric vehicles and the like cannot be met, and the application and development of the fiber structure battery are hindered. The 3D printing technology adopts a line-by-line stacking-layer-by-layer stacking manufacturing principle, can realize the die-free integrated low-cost rapid manufacturing of complex structures, and is applied to the fields of aerospace, automobiles, medical treatment and the like. The manufacturing difficulty of the fiber structure battery is solved by utilizing the 3D printing technology, the high-performance low-cost rapid manufacturing of the bearing and energy storage integrated fiber structure battery with a complex structure is realized, and the method has important application value and wide market prospect.
The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
In order to overcome the problems in the prior art, the application aims to provide a fiber structure battery with integrated bearing and energy storage and a 3D printing method thereof, which realize the complementary advantages of high bearing performance of fibers and energy storage function of the battery and can realize the low-cost and high-efficiency manufacturing of the fiber structure battery with a complex structure.
In order to achieve the above purpose, the application adopts the following technical scheme:
a battery with integrated energy storage structure is prepared as using conductive continuous fiber tow as current collector, adhering negative electrode active substance to continuous fiber tow, using thermoplastic polymer electrolyte as external layer, mixing positive electrode active substance with thermoplastic polymer electrolyte as solid electrolyte and using insulating thermoplastic resin as external layer.
In some embodiments of the application, the thermoplastic polymer electrolyte is a thermoplastic polycarbonate-based polymer electrolyte, a thermoplastic polyurethane-based polymer electrolyte, or a thermoplastic polyurethane gel polymer electrolyte.
In some embodiments of the application, the load-bearing energy-storage integrated fiber structure battery is a multi-layer all-solid-state battery integrally formed using 3D printing.
In some embodiments of the application, the continuous fiber tows are carbon fibers, metal fibers, carbon black based fibers, conductive polymer fibers, or conductive metal compound fibers.
In some embodiments of the application, the negative electrode active material is graphite, silicon, or a graphite-silicon mixture.
In some embodiments of the application, the positive electrode active material is lithium iron phosphate, lithium cobalt oxide, or a ternary material.
In another embodiment of the present application, there is provided a 3D printing method for carrying an energy storage integrated fiber structure battery, including the steps of:
step 1, a conductive continuous fiber strand is drawn out from a fiber roller, enters an impregnating device, and enters the conductive continuous fiber strand through the slurry of the mixed negative electrode active material, and the slurry of the mixed negative electrode active material is adhered in the conductive continuous fiber strand under the action of fiber tension and slurry viscosity to form a composite continuous fiber strand and is drawn out from the impregnating device;
step 2, the composite continuous fiber tows pass through a drying device, water in the slurry is removed, and negative active substances are still adhered to the continuous fiber tows to form dried composite continuous fiber tows;
step 3, extracting the dried composite continuous fiber tows from the drying device, entering the twisting device, and twisting the dried composite continuous fiber tows to enable the negative electrode active material to be tightly locked in the continuous fiber tows;
step 4, introducing the continuous fiber tows obtained in the step 3 into a first melting cavity, extruding and conveying the thermoplastic polymer electrolyte into the first melting cavity by an extrusion feeding device, wrapping the continuous fiber tows, extruding from a first die to form a composite continuous fiber tows wrapped by the thermoplastic polymer electrolyte, and cooling and solidifying by a first cooling device;
step 5, introducing the composite continuous fiber tows obtained in the step 4 into a second melting cavity, extruding and conveying the thermoplastic polymer electrolyte mixed with the positive electrode active substances into the second melting cavity by using a second extruding and feeding device, wrapping the continuous fiber tows, extruding from a second die, and cooling and solidifying by using a second cooling device;
and 6, enabling the composite continuous fiber tows obtained in the step 5 to enter a printing spray head through a guide roller, enabling the insulating thermoplastic resin to enter the printing spray head under the action of a filament extruder, heating the printing spray head to enable the thermoplastic resin to be molten and clad with the composite continuous fiber tows, extruding the composite continuous fiber tows under the conveying pressure of the filament extruder, and cooling and solidifying the composite continuous fiber tows through a cooling device three to obtain the battery with the integrated fiber structure for bearing and storing energy.
In some embodiments of the present application, the printing nozzle moves under the control of the printing path data, and simultaneously extrudes the integrated fiber structure battery with the bearing and energy storage, so that the integrated fiber structure battery with the bearing and energy storage and having a complex structure can be formed.
The application has the beneficial effects that:
1. the fiber structure battery provided by the application has excellent mechanical properties of fibers and an energy storage function of the battery, improves the system efficiency and reduces the weight of equipment.
2. The 3D printing method for the fiber structure battery can realize the integrated manufacture of the fiber structure battery with a complex structure, and provides a new manufacturing means for the manufacture of the customized special-shaped structure battery.
3. The 3D printing method for the fiber structure battery has the advantages of simple manufacturing process, low manufacturing cost and short period.
4. The 3D printing method for the fiber structure battery provided by the application has flexible and controllable manufacturing process, and can regulate and control the fiber distribution in the fiber structure battery according to application requirements through printing path design, so that the mechanical property and the energy storage property of the fiber structure battery are optimized.
Drawings
The application will be further described with reference to the drawings and examples.
FIG. 1 is a 3D printing process flow diagram of a battery of the present application carrying an energy storage integrated fiber structure;
FIG. 2 is a schematic cross-sectional view of a load-bearing energy storage integrated fiber structure cell of the present application;
Detailed Description
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present application, and are intended to be illustrative of the present application only and should not be construed as limiting the scope of the present application.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In some embodiments of the present application, the present example employs carbon fibers as the continuous fiber tow 2-1, graphite as the negative electrode active material 3-2, and lithium iron phosphate as the positive electrode active material 12.
In some embodiments of the application, a load-bearing energy-storage integrated fibrous structure battery fabricated using 3D printing integrated form, comprising: the conductive continuous fiber tows 2-1 are used as current collectors, the negative electrode active material 3-2 is adhered to the continuous fiber tows 2-1, the thermoplastic polymer electrolyte 7 is arranged on the outer layer, the solid electrolyte is used as solid electrolyte, the thermoplastic polymer electrolyte mixed with the positive electrode active material 12 is arranged outside the solid electrolyte, and the insulating thermoplastic resin 18 is arranged on the outermost layer.
In another embodiment of the present application, a 3D printing method for carrying an energy storage integrated fiber structure battery includes the steps of:
step 1, a conductive continuous fiber bundle 2-1 is extracted from a fiber roll 1, enters an impregnating device 4, the slurry 3-1 of a mixed negative electrode active material 3-2 enters the conductive continuous fiber bundle 2-1 through the slurry 3-1 of the mixed negative electrode active material 3-2, and the slurry 3-1 of the mixed negative electrode active material 3-2 is adhered in the conductive continuous fiber bundle 2-1 under the action of fiber tension and viscosity of the slurry 3-1 to form a composite continuous fiber bundle 2-2, and is extracted from the impregnating device 4;
step 2, the composite continuous fiber tows 2-2 pass through a drying device 5, the water in the slurry 3-1 is removed, and the negative electrode active material 3-2 still adheres to the continuous fiber tows 2-1 to form composite continuous fiber tows 2-3 wrapped by the negative electrode active material 3-2;
step 3, the composite continuous fiber tows 2-3 are extracted from the drying device 5 and enter the twisting device 6, and the composite continuous fiber tows 2-3 are twisted and twisted, so that the negative electrode active material 3-2 is tightly locked in the continuous fiber tows 2-1;
step 4, the twisted composite continuous fiber tows 2-3 enter a melting cavity I8-2, meanwhile, a thermoplastic polymer electrolyte 7 is extruded and conveyed into the melting cavity I8-2 by an extrusion feeding device I8-1, the continuous fiber tows 2-3 are wrapped, the composite continuous fiber tows 2-4 wrapped by the thermoplastic polymer electrolyte are formed by extrusion from a die I9, and then the composite continuous fiber tows are cooled and solidified by a cooling device I10;
step 5, feeding the composite continuous fiber tows 2-4 obtained in the step 4 into a second melting chamber 11-2, simultaneously extruding and conveying the thermoplastic polymer electrolyte mixed with the positive electrode active substance 12 into the second melting chamber 11-2 by a second extrusion feeding device 11-1, wrapping the composite continuous fiber tows 2-4, extruding from a second die 13 to form composite continuous fiber tows 2-5, and cooling and solidifying by a cooling device 14;
and 6, enabling the composite continuous fiber tows 2-5 to enter a printing spray head 16 through a guide roller 15, enabling an insulating thermoplastic resin 18 to enter the printing spray head 16 under the action of a wire extruder 17, heating the printing spray head 16 to enable the thermoplastic resin 18 to melt and wrap the composite continuous fiber tows 2-5, extruding the composite continuous fiber tows under the conveying pressure of the wire extruder 17, and then cooling and solidifying the composite continuous fiber tows through a cooling device 19 to obtain the cooled linear type battery 20 with the integrated energy storage and bearing fiber structure.
In some embodiments of the present application, the print head 16 moves under control of the print path data while extruding the load-bearing energy-storing integrated fiber structure cell 20 to form a load-bearing energy-storing integrated fiber structure cell having a complex structure.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (7)
1. The battery is characterized in that the battery is a multilayer all-solid-state battery formed by 3D printing integration, conductive continuous fiber tows are used as current collectors, negative electrode active substances are adhered to the continuous fiber tows, a layer of thermoplastic polymer electrolyte is outwards used as solid electrolyte, the solid electrolyte is outwards used as thermoplastic polymer electrolyte mixed with positive electrode active substances, and the outermost layer is insulating thermoplastic resin.
2. The energy storage integrated fiber structure battery according to claim 1, wherein the thermoplastic polymer electrolyte is a thermoplastic polycarbonate-based polymer electrolyte, a thermoplastic polyurethane-based polymer electrolyte, or a thermoplastic polyurethane gel polymer electrolyte.
3. The integrated load-bearing and energy-storage fiber structure battery according to claim 1, wherein the conductive continuous fiber tows are one or more of carbon fibers, metal fibers, carbon black fibers, conductive polymer fibers, and conductive metal compound fibers.
4. The integrated fiber structure battery of claim 1, wherein the negative electrode active material is graphite, silicon or a graphite-silicon mixture.
5. The integrated fiber structure battery of claim 1, wherein the positive electrode active material is lithium iron phosphate, lithium cobalt oxide or ternary material.
6. A 3D printing method for a battery of integrated fiber structure carrying energy storage according to any one of claims 1-5, comprising the steps of:
step 1, a conductive continuous fiber strand is drawn out from a fiber roller, enters an impregnating device, and enters the conductive continuous fiber strand through the slurry of the mixed negative electrode active material, and the slurry of the mixed negative electrode active material is adhered in the conductive continuous fiber strand under the action of fiber tension and slurry viscosity to form a composite continuous fiber strand and is drawn out from the impregnating device;
step 2, the composite continuous fiber tows pass through a drying device, water in the slurry is removed, and negative active substances are still adhered to the continuous fiber tows to form dried composite continuous fiber tows;
step 3, extracting the dried composite continuous fiber tows from the drying device, entering the twisting device, and twisting the dried composite continuous fiber tows to enable the negative electrode active material to be tightly locked in the continuous fiber tows;
step 4, introducing the continuous fiber tows obtained in the step 3 into a first melting cavity, extruding and conveying the thermoplastic polymer electrolyte into the first melting cavity by an extrusion feeding device, wrapping the continuous fiber tows, extruding from a first die to form a composite continuous fiber tows wrapped by the thermoplastic polymer electrolyte, and cooling and solidifying by a first cooling device;
step 5, introducing the composite continuous fiber tows obtained in the step 4 into a second melting cavity, extruding and conveying the thermoplastic polymer electrolyte mixed with the positive electrode active substances into the second melting cavity by using a second extruding and feeding device, wrapping the continuous fiber tows, extruding from a second die, and cooling and solidifying by using a second cooling device;
and 6, enabling the composite continuous fiber tows obtained in the step 5 to enter a printing spray head through a guide roller, enabling the insulating thermoplastic resin to enter the printing spray head under the action of a filament extruder, heating the printing spray head to enable the thermoplastic resin to be molten and clad with the composite continuous fiber tows, extruding the composite continuous fiber tows under the conveying pressure of the filament extruder, and cooling and solidifying the composite continuous fiber tows through a cooling device three to obtain the battery with the integrated fiber structure for bearing and storing energy.
7. The 3D printing method of the battery with the integrated energy storage and fiber structure according to claim 6, wherein the printing nozzle moves under the control of printing path data, and the battery with the integrated energy storage and fiber structure is extruded at the same time, so that the battery with the integrated energy storage and fiber structure with a complex structure can be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310874981.1A CN116598571B (en) | 2023-07-17 | 2023-07-17 | Bearing energy storage integrated fiber structure battery and 3D printing method thereof |
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| CN202310874981.1A CN116598571B (en) | 2023-07-17 | 2023-07-17 | Bearing energy storage integrated fiber structure battery and 3D printing method thereof |
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| CN116598571B CN116598571B (en) | 2023-10-27 |
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