A method for preparing a supercell of a vortex electromagnetic field

Abstract

This invention relates to the field of battery technology, specifically disclosing a method for preparing a vortex electromagnetic field super battery. The preparation method includes positive electrode slurry preparation, vortex structure electric field induction, positive electrode forming, negative electrode preparation, cell assembly, encapsulation, electrolyte injection, formation, and aging. Based on the basic ion vortex theory and the principle of vortex electromagnetic fields, this invention induces a vortex-shaped nanostructure in the positive electrode active material through a directional left-handed electric field. Utilizing the confinement and energy storage effect of the vortex field, it overcomes the macroscopic particle limitation of ion migration in traditional batteries, achieving an energy density of ≥1500Wh / kg, which is 3-4 times that of existing lithium batteries. Driven by the field force of the vortex field, electrons form a directional, lossless vortex motion, achieving a charge / discharge response time in the microsecond range, far exceeding the millisecond response speed of traditional batteries. The charge / discharge rate is significantly improved compared to existing super batteries. Simultaneously, the battery's cycle life and stability far surpass existing energy storage devices.

Description

Technical Field

[0001] This invention belongs to the field of battery technology, specifically relating to a method for preparing a vortex electromagnetic field super battery. Background Technology

[0002] In the field of electrochemical energy storage devices, existing super batteries and various energy storage devices generally face multiple technical bottlenecks, which severely restrict their widespread application in various scenarios. The charge transfer of traditional electrochemical energy storage batteries relies on ion migration between the electrodes and the electrolyte. This mode is limited by the laws of macroscopic particle motion, which not only makes it difficult to achieve lossless energy transfer, but also has the problem of limited charge and discharge rates. Its response speed is mostly in the millisecond range, which cannot meet the needs of high-power devices.

[0003] To improve energy storage efficiency, existing technologies typically employ multi-layered, complex structural designs. This not only increases the difficulty and cost of battery fabrication but also leads to more failure points, reducing battery stability and lifespan. Furthermore, the complex structure hinders the miniaturization and integration of energy storage devices, making them unsuitable for applications with strict size requirements, such as portable electronic devices.

[0004] Furthermore, the energy density of existing energy storage devices is generally low, far from meeting the high-energy storage requirements of scenarios such as new energy vehicles and large-scale energy storage power stations; and the significant energy transmission loss further weakens their practical application value. Currently, there is no energy storage solution in the industry based on the principle of vortex electromagnetic fields to achieve the directional movement of electrons, making it impossible to achieve efficient and lossless electron transmission through field force, nor has a simplified battery structure adapted to the principle of vortex fields been developed. This makes it difficult to achieve a balance between performance improvement and structural simplification in energy storage devices, and there is an urgent need for a new energy storage technology solution that can overcome the above-mentioned technical bottlenecks. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing a vortex electromagnetic field super battery, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for fabricating a vortex electromagnetic field supercell includes the following steps:

[0008] Includes the following steps:

[0009] S1. Preparation of positive electrode slurry: Add positive electrode active material, conductive agent, binder and solvent, and stir using a conventional high-speed dispersion mixer for lithium batteries to make a uniform slurry, in preparation for vortex structure induction;

[0010] S2, Vortex Structure Electric Field Induction: After the slurry is prepared and before coating, the positive electrode slurry obtained in S1 is passed into a directional left-handed electric field induction machine and a pure left-handed DC electric field is applied to make the active material particles in the slurry form a basic ion vortex nanostructure.

[0011] S3. Positive electrode forming: The slurry induced by S2 is coated onto the current collector, and then dried, rolled and cut to form a positive electrode sheet.

[0012] S4. Negative electrode preparation: Following the standard process for lithium batteries, the negative electrode slurry is prepared, coated, dried, rolled, and slit in sequence to form a negative electrode sheet, without the need for additional vortex structure induction.

[0013] S5. Cell Assembly: The positive electrode sheet, separator, and negative electrode sheet are assembled into a cell by winding or stacking in the order of positive electrode, separator, negative electrode, separator.

[0014] S6. Packaging: The assembled battery cells are packaged using aluminum-plastic film;

[0015] S7. Electrolyte injection: Inject electrolyte into the packaged cell and let it stand to allow the electrolyte to fully wet the cell.

[0016] S8. Formation and Aging: The cells after liquid injection are subjected to formation treatment, followed by static aging at room temperature to activate the active materials of the battery, form a stable SEI film, and obtain a vortex electromagnetic field super battery.

[0017] Preferably, the positive electrode active material in S1 is lithium iron phosphate (LFP) or ternary NCM622, with a particle size of 1-3 μm and a purity ≥99.5%; the conductive agent is a mixture of conductive carbon black (SP) and carbon nanotubes (CNT), with a mass ratio of SP:CNT=9:1; the binder is PVDF with a solid content of 5%; the solvent is NMP with a purity ≥99.9%; the stirring parameters are a rotation speed of 2000 r / min and a time of 60 min, resulting in a slurry with a solid content of 60%-65%, a viscosity of 8000-12000 mPa·s, and a fineness ≤10 μm.

[0018] Preferably, the electric field strength of the pure left-handed DC electric field in S2 is 6 × 10⁻⁶. 3 V / m-1×10 4 V / m, action time is 30s / batch, environmental conditions are normal temperature and pressure.

[0019] Preferably, in step S3, the current collector is a 12μm thick aluminum foil with a surface roughness Ra of 0.3-0.5μm; the coating is performed using a slit extrusion coating machine, with a coating surface density of 20-25 mg / cm³. 2The coating speed is 30 m / min, and the thickness error after coating is ≤ ±2 μm. Drying employs a three-stage temperature process: 80℃, 100℃, and 120℃ sequentially, with a total drying time of 5 min. The moisture content of the electrode sheet after drying is ≤ 500 ppm. The rolling pressure is 15-20 MPa, and the density of the electrode sheet after rolling is 3.6-3.8 g / cm³. 3 The cutting speed is 60m / min, the cut is smooth and burr-free, and the dimensional error is ≤±0.1mm.

[0020] Preferably, the negative electrode active material in S4 is artificial graphite with a particle size of 5-8 μm and a specific surface area of ​​12-18 m². 2 / g; the binder is a CMC+SBR mixture with a solid content of 2%; the solvent is deionized water; the process parameters for the preparation, coating, drying, rolling and slitting of the negative electrode slurry are consistent with the corresponding process of the positive electrode.

[0021] Preferably, the encapsulation in S6 is performed using an aluminum-plastic film encapsulation machine with an encapsulation temperature of 180℃, an encapsulation pressure of 0.4MPa, and an edge sealing width of ≥5mm.

[0022] Preferably, the electrolyte in S7 is a 1 mol / L LiPF6 electrolyte with a solvent ratio of EC:EMC=3:7; the electrolyte is injected using a vacuum injection machine with a vacuum degree of -0.095MPa, an injection volume error of ±0.1mL, and a standing time of 30min; the diaphragm is a polyethylene (PE) diaphragm with a thickness of 16μm and a porosity of 40%-45%.

[0023] Preferably, the formation in S8 uses a conventional lithium battery formation cabinet. If the positive electrode active material is LFP, the formation voltage is 3.65V; if it is NCM622, the formation voltage is 4.2V; the charging current is 0.05C; the aging time is 24 hours, and the battery is left to stand at room temperature; after formation, the battery capacity consistency is ≥98%, the internal resistance is ≤30mΩ, and there is no gas expansion or leakage.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention, based on the fundamental ion vortex theory and the principle of vortex electromagnetic fields, induces a vortex-like nanostructure in the positive electrode active material through a directional left-handed electric field. Utilizing the confinement and energy storage effect of the vortex field, it overcomes the macroscopic particle limitations of ion migration in traditional batteries, achieving an energy density of ≥1500Wh / kg, which is 3-4 times that of existing lithium batteries and more than 80% higher than existing super batteries. This fully meets the high-energy storage requirements of new energy vehicles, energy storage power stations, and other scenarios. Driven by the field force of the vortex field, electrons form a directional, lossless vortex motion, achieving a charge / discharge response time in the microsecond range, far exceeding the millisecond response speed of traditional batteries. The charge / discharge rate is more than 10 times higher than existing super batteries. Simultaneously, the battery's cycle life and stability far surpass existing energy storage devices.

[0026] The confinement effect of the vortex structure effectively avoids the thermal runaway problem that is prone to occur in traditional batteries. At the same time, this invention eliminates the redundant structures such as separators and current collectors in traditional batteries. The core consists of three major components: a vortex field generation module, an electronic energy storage cavity, and an energy output interface. The structure is simple and compact, which greatly reduces the difficulty of miniaturization and integration. It can be widely adapted to various energy storage scenarios such as portable electronic devices, new energy vehicles, and energy storage power stations. Moreover, it is compatible with existing lithium battery production lines without the need for large-scale modification of the original production lines.

[0027] Ordinary lithium battery factories do not need to introduce high-end technologies such as semiconductors and micro-processing, nor do they need specialized personnel. They only need to connect a directional left-handed electric field induction machine between the mixer and coating machine of the existing production line to start production. Workers do not need to be retrained. It only takes one month from equipment connection to sample production, and mass production can be achieved in three months. The production capacity is consistent with the existing lithium battery production line, which is suitable for large-scale popularization and promotion. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] A method for fabricating a vortex electromagnetic field supercell includes the following steps:

[0031] Phase 1: Cathode Fabrication (Core Vortex Structure Formation Stage)

[0032] For slurry preparation, LFP (88wt%), conductive agent (5wt%), PVDF binder (7wt%), and NMP solvent were added in proportion and placed in a high-speed dispersing mixer (Greete GRT-500). The stirring speed was set to 2000 r / min, and the stirring time was 60 min to prepare a positive electrode slurry with a solid content of 62% and a viscosity of 10000 mPa·s. Testing showed that the slurry was uniform, free of particles, and had a fineness of 8 μm, meeting the requirements for subsequent induction.

[0033] Vortex structure electric field induction: The prepared positive electrode slurry is passed into a directional left-handed electric field inducor, and the core parameters are set as follows: the electric field direction is purely left-handed, and the electric field strength is 8×10⁻⁶. 3The reaction time was 30 seconds per batch, and the environment was normal temperature (25℃) and normal pressure. Scanning electron microscopy (SEM) analysis showed that the LFP particles in the slurry exhibited a vortex structure formation rate of 96.3%, with the particles arranged in a uniform vortex pattern without disordered distribution.

[0034] Electrode coating was performed using a slit-type extrusion coating machine to uniformly coat the induced vortex structure slurry onto a 12μm aluminum foil current collector, with a coating surface density of 22mg / cm². 2 The coating speed was 30 m / min. Online thickness gauge testing showed uniform coating thickness with an error of ±1.5 μm, and no exposed foil or pinhole defects.

[0035] The coated electrode sheets were then dried in a multi-layer hot air drying oven using a three-stage temperature process: 80℃ (1.5 min) → 100℃ (2 min) → 120℃ (1.5 min), for a total drying time of 5 min. After drying, the electrode sheets had a moisture content of 380 ppm, no warping, and a smooth surface.

[0036] Roll pressing: The dried electrode sheets are rolled using a double-roll mill with a rolling pressure of 18 MPa. The density of the electrode sheets after rolling is 3.7 g / cm³. 3 Density error ±0.03 g / cm³ 3 The vortex structure was not destroyed.

[0037] The electrode sheets are slit into 80mm wide pieces using a CNC slitting machine at a speed of 60m / min. The cuts are smooth and burr-free with a dimensional error of ±0.08mm, which is suitable for battery cell assembly requirements.

[0038] Phase Two: Negative Electrode Preparation. The negative electrode is prepared using the same process as the positive electrode: Artificial graphite (90wt%), conductive agent (4wt%), CMC+SBR binder (6wt%), and deionized water are added and stirred (2000 r / min, 60 min) to prepare a slurry with a solid content of 60% and a viscosity of 9000 mPa·s; subsequent coating (area density 18 mg / cm³) is then performed. 2 Drying (three-stage temperature control, moisture content 420ppm), rolling (pressure 16MPa, density 1.7g / cm³) 3 The slitting (80mm wide) process parameters are matched with the positive electrode to ensure the capacity balance between the positive and negative electrodes.

[0039] Phase 3: Cell assembly and formation. A fully automated winding machine is used to wind the cells in the order of positive electrode, separator, negative electrode, and separator. After winding, the alignment of the tabs is ±0.3mm, with no misalignment. The production capacity is maintained at 5000 pieces / hour, consistent with the existing production line.

[0040] The wound battery cells are packaged using an aluminum-plastic film packaging machine. The packaging temperature is set to 180℃, the packaging pressure to 0.4MPa, and the edge sealing width to 6mm. After packaging, there are no wrinkles or leaks, and the airtightness test is qualified.

[0041] Electrolyte injection is performed using a vacuum injection machine to inject electrolyte into the packaged battery cell. The vacuum level is set to -0.095MPa, and the injection volume error is ±0.08mL. After injection, the cell is allowed to stand for 30 minutes to ensure that the electrolyte is fully wetted and that there are no residual air bubbles.

[0042] For formation and aging, the electrolyte-filled cells were placed in a battery formation cabinet, with a formation voltage of 3.65V (LFP system) and a charging current of 0.05C. After formation, the cells were left to age at room temperature for 24 hours. Testing with a comprehensive battery tester showed that the formed cells exhibited a 98.7% capacity consistency, an internal resistance of 26mΩ, no gas expansion or leakage, and stable energy storage effect of the activated vortex structure.

[0043] Example 2:

[0044] A method for preparing a vortex electromagnetic field super battery includes the following steps;

[0045] Material preparation; Positive electrode active material: ternary material NCM622 (nickel-cobalt-manganese ratio 6:2:2), particle size 1~2μm, purity 99.5%, as the core energy storage unit, adapted to the vortex structure induction requirements;

[0046] Negative electrode active material: artificial graphite, particle size 6~8μm, specific surface area 16m² 2 / g, used to match the positive electrode vortex field and improve lithium storage efficiency;

[0047] Conductive agent: conductive carbon black (SP) and carbon nanotubes (CNT), with a mass ratio of SP:CNT=9:1, to ensure electrode conductivity;

[0048] Binder: PVDF (5% solid content) is used for the positive electrode, and CMC+SBR (2% solid content) is used for the negative electrode to ensure the structural stability of the active material and the current collector;

[0049] Solvents: NMP (99.9% purity) is used for the positive electrode, and deionized water is used for the negative electrode, to prepare a uniform slurry;

[0050] Current collector: 12μm thick aluminum foil for positive electrode (surface roughness Ra0.3~0.5μm, measured Ra0.45μm), 8μm thick electrolytic copper foil for negative electrode, to achieve efficient charge transfer;

[0051] Electrolyte: 1 mol / L LiPF6 electrolyte, solvent ratio EC:EMC = 3:7 (volume ratio), to provide a medium for ion conduction;

[0052] Separator: Polyethylene (PE) separator, 16μm thick, 43% porosity, isolates positive and negative electrodes to prevent short circuits, and is adapted to the charge and discharge characteristics of ternary systems.

[0053] Standard mass production equipment: High-speed dispersion mixer (model: Great GRT-500, standard equipment for lithium batteries); Slit extrusion coating machine (model: Haoneng Technology, standard coating equipment for lithium batteries);

[0054] Multi-layer hot air drying oven (conventional three-stage drying equipment for lithium batteries); roller mill (conventional rolling equipment for lithium batteries, pressure adjustment range 0~50MPa); CNC slitting machine (conventional slitting equipment for lithium batteries, slitting speed 0~100m / min); fully automatic winding machine (conventional assembly equipment for lithium batteries, capacity 5000 pieces / hour); aluminum-plastic film packaging machine (conventional packaging equipment for lithium batteries, temperature control accuracy ±1℃); vacuum liquid injection machine (conventional liquid injection equipment for lithium batteries, vacuum degree adjustment range -0.1~0MPa); battery formation cabinet (model: Chroma, adapted to ternary system formation parameters);

[0055] Auxiliary testing equipment: online thickness gauge (accuracy ±0.1μm), scanning electron microscope (SEM, model: Zeiss Sigma300), battery comprehensive tester (accuracy ±0.05%); directional left-handed electric field induction machine.

[0056] The specific preparation method is as follows: the following ingredients are precisely proportioned according to the following mass ratio: NCM622 positive electrode active material (89wt%), conductive agent (SP+CNT, 5wt%), PVDF binder (6wt%), and solvent NMP is added to a high-speed dispersion mixer (Greete GRT-500) according to the target of "solid content 63%".

[0057] Set the stirring parameters: 2000 r / min speed, 60 min stirring time, and monitor the slurry status in real time during the stirring process to ensure no particle agglomeration.

[0058] Quality control point testing: The slurry viscosity is 11000 mPa·s, the fineness is 7 μm, and it is uniform with no obvious particles, which meets the raw material requirements for subsequent vortex structure induction.

[0059] The vortex structure electric field inducer directly introduces the prepared ternary cathode slurry into the directional left-handed vortex electric field inducer through a pipeline, and sets the core process parameters:

[0060] Electric field direction: pure left-handed (ensuring consistent vortex field rotation to form an effective binding field);

[0061] Electric field strength: 8×10 3 V / m (adapts to the viscosity of ternary slurry to avoid overly dense or unformed structures);

[0062] Processing time: 30s / batch (the amount of slurry processed per batch is matched with the capacity of the mixer and coating machine, without slowing down the production line speed).

[0063] Environmental conditions: ambient temperature (23℃) and ambient pressure (101.325kPa), no vacuum or inert gas protection required, simplifying operation.

[0064] Quality control point inspection: The arrangement of NCM622 particles in the slurry was observed by SEM. The vortex structure formation rate reached 95.8%, and the particles were evenly distributed in a vortex shape without random accumulation, which met the core structure requirements.

[0065] Electrode coating involves introducing the vortex-induced positive electrode slurry into a slit-type extrusion coating machine (directly connected to the outlet of the electric field induction machine) and coating it onto the surface of a 12μm thick aluminum foil current collector.

[0066] Coating parameters set: Coating surface density 23 mg / cm³ 2 The coating speed is 30m / min and the coating width is 80mm.

[0067] Real-time monitoring with an online thickness gauge ensures uniform coating thickness with an error of ±1.8μm, and eliminates defects such as exposed foil, pinholes, and scratches, ensuring that the vortex structure is not damaged during the coating process.

[0068] Drying: The coated positive electrode sheet is sent into a multi-layer hot air drying oven, using a three-stage gradient heating process to avoid rapid solvent evaporation that could cause deformation of the vortex structure.

[0069] First stage: 80℃ for 1.5 min (initial removal of surface solvent);

[0070] Second stage: 100℃ for 2 minutes (deep removal of internal solvent);

[0071] Third stage: 120℃ for 1.5 min (to solidify the electrode junction).

[0072] The total drying time was 5 minutes. After drying, the moisture content of the electrode sheet was 410 ppm. It was free from warping, had a smooth surface, and maintained its vortex structure intact.

[0073] Rolling: The dried positive electrode sheet is fed into the roller press, and the rolling parameters are set as follows: rolling pressure 19MPa, rolling speed 20m / min.

[0074] Quality control point inspection: Electrode sheet density after rolling is 3.75 g / cm³. 3 Density error ±0.04 g / cm³ 3 SEM re-inspection showed that the vortex structure was not damaged by compression, and the density of the active material met the design requirements.

[0075] The positive electrode sheet after rolling is cut into specified sizes (width 80mm, length set to 150mm according to the cell capacity requirement) using a CNC slitting machine. The slitting parameters are set as follows: slitting speed 60m / min, blade pressure 0.3MPa.

[0076] Quality control point inspection: After slitting, the electrode cut is flat and burr-free (burr length ≤ 0.05mm), the size error is ±0.09mm, the electrode tab position is accurate, and it meets the requirements of subsequent cell assembly.

[0077] Phase Two: Negative Electrode Preparation. The negative electrode preparation process follows the conventional lithium battery process, with parameters precisely matched to the positive electrode process to ensure capacity balance between the positive and negative electrodes and to synergistically form an overall vortex field effect.

[0078] Slurry preparation: Artificial graphite (91wt%), conductive agent (SP+CNT, 4wt%), and CMC+SBR binder (5wt%) were added according to the mass ratio. Deionized water was added as a solvent. The mixture was stirred using a high-speed dispersing mixer (the same model as the positive electrode) with the following parameters set: speed 2000r / min and stirring time 60min. A negative electrode slurry with a solid content of 61%, viscosity of 9500mPa·s, fineness of 9μm, and uniformity without particles was prepared.

[0079] Coating: A slot-type extrusion coating machine was used to coat the surface of an 8μm thick electrolytic copper foil, with a coating surface density of 19mg / cm³. 2 The coating speed is 30 m / min, and the coating error is ±1.7 μm.

[0080] Drying: The same three-stage drying process as the positive electrode is adopted, with a drying time of 5 minutes, a moisture content of 430 ppm, and no warping.

[0081] Roller pressing: Roller pressing pressure 17MPa, density after roller pressing 1.72g / cm³ 3 Density error ±0.03 g / cm³ 3 ;

[0082] Slitting: Slitting speed 60m / min, slitting size matches the positive electrode sheet (width 80mm, length 155mm), cut surface is flat and burr-free.

[0083] Phase 3: Cell assembly and formation. A fully automatic winding machine is used to wind and assemble the cells in the order of positive electrode, separator, negative electrode, and separator. The winding parameters are set as follows: winding speed 30 r / min, tension 0.2 N, and tab alignment accuracy ±0.4 mm.

[0084] Quality control point inspection: The wound cells have no misalignment, separator wrinkles, or tab misalignment. The cell size is 100mm×80mm×10mm (soft-pack cell), which meets the design specifications. The production capacity is maintained at 5000 pieces / hour, consistent with the existing production line.

[0085] For encapsulation, the wound battery cell is fed into an aluminum-plastic film encapsulation machine and a hot-press encapsulation process is adopted. The encapsulation parameters are set as follows: encapsulation temperature 180℃, encapsulation pressure 0.4MPa, edge sealing width 6mm, and encapsulation time 3s.

[0086] Quality control point inspection: After packaging, the battery cell has no wrinkles, leaks, or incomplete sealing. It passes the airtightness test (vacuum degree -0.09MPa, pressure holding for 30s with no leakage) to ensure that the electrolyte does not leak and that moisture does not seep in.

[0087] For electrolyte injection, a vacuum injection machine is used to inject 1 mol / L LiPF6 electrolyte (solvent EC:EMC=3:7) into the packaged cell. The injection parameters are set as follows: vacuum degree -0.095MPa, injection volume calculated based on cell capacity as 15.2mL, and injection error ±0.09mL. After injection, the cell is allowed to stand for 30 minutes to ensure that the electrolyte fully wets the positive and negative electrode plates and the separator, and that there are no residual air bubbles.

[0088] Formation and aging: After electrolyte injection, the battery cells are placed in a battery formation cabinet (Chroma). The formation parameters for the ternary system are set as follows: formation voltage 4.2V (different from 3.65V for LFP system), charging current 0.05C, formation time 8h, and then left to age at room temperature for 24h to activate the vortex energy storage effect of NCM622 material and form a stable SEI film.

[0089] Quality control point inspection: After formation, the cell capacity consistency is 98.3%, the internal resistance is 28mΩ, there is no gas expansion or leakage, and the voltage inspection shows no defects such as zero voltage or low voltage, meeting the factory requirements.

[0090] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a vortex electromagnetic field supercell, characterized in that, Includes the following steps: S1. Preparation of positive electrode slurry: Add positive electrode active material, conductive agent, binder and solvent, and stir using a conventional high-speed dispersion mixer for lithium batteries to make a uniform slurry, in preparation for vortex structure induction; S2, Vortex Structure Electric Field Induction: After the slurry is prepared and before coating, the positive electrode slurry obtained in S1 is passed into a directional left-handed electric field induction machine and a pure left-handed DC electric field is applied to make the active material particles in the slurry form a basic ion vortex nanostructure. S3. Positive electrode forming: The slurry induced by S2 is coated onto the current collector, and then dried, rolled and cut to form a positive electrode sheet. S4. Negative electrode preparation: Following the standard process for lithium batteries, the negative electrode slurry is prepared, coated, dried, rolled, and slit in sequence to form a negative electrode sheet, without the need for additional vortex structure induction. S5. Cell Assembly: The positive electrode sheet, separator, and negative electrode sheet are assembled into a cell by winding or stacking in the order of positive electrode, separator, negative electrode, separator. S6. Packaging: The assembled battery cells are packaged using aluminum-plastic film; S7. Electrolyte injection: Inject electrolyte into the packaged cell and let it stand to allow the electrolyte to fully wet the cell. S8. Formation and Aging: The cells after liquid injection are subjected to formation treatment, followed by static aging at room temperature to activate the active materials of the battery, form a stable SEI film, and obtain a vortex electromagnetic field super battery.

2. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The positive electrode active material in S1 is lithium iron phosphate (LFP) or ternary NCM622, with a particle size of 1-3 μm and a purity of ≥99.5%; the conductive agent is a mixture of conductive carbon black (SP) and carbon nanotubes (CNT), with a mass ratio of SP:CNT=9:1; the binder is PVDF with a solid content of 5%; the solvent is NMP with a purity of ≥99.9%; the stirring parameters are a rotation speed of 2000 r / min and a time of 60 min, resulting in a slurry with a solid content of 60%-65%, a viscosity of 8000-12000 mPa·s, and a fineness of ≤10 μm.

3. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The electric field strength of the pure left-handed DC electric field in S2 is 6 × 10⁻⁶. 3 V / m-1×10 4 V / m, action time is 30s / batch, environmental conditions are normal temperature and pressure.

4. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: In step S3, the current collector is a 12μm thick aluminum foil with a surface roughness Ra of 0.3-0.5μm; the coating is performed using a slit extrusion coating machine, with a coating surface density of 20-25 mg / cm³. 2 The coating speed is 30 m / min, and the thickness error after coating is ≤ ±2 μm. Drying employs a three-stage temperature process: 80℃, 100℃, and 120℃ sequentially, with a total drying time of 5 min. The moisture content of the electrode sheet after drying is ≤ 500 ppm. The rolling pressure is 15-20 MPa, and the density of the electrode sheet after rolling is 3.6-3.8 g / cm³. 3 The cutting speed is 60m / min, the cut is smooth and burr-free, and the dimensional error is ≤±0.1mm.

5. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The negative electrode active material in S4 is artificial graphite with a particle size of 5-8 μm and a specific surface area of ​​12-18 m². 2 / g; the binder is a CMC+SBR mixture with a solid content of 2%; the solvent is deionized water; the process parameters for the preparation, coating, drying, rolling and slitting of the negative electrode slurry are consistent with the corresponding process of the positive electrode.

6. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The S6 uses an aluminum-plastic film encapsulation machine with an encapsulation temperature of 180℃, an encapsulation pressure of 0.4MPa, and an edge sealing width of ≥5mm.

7. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The electrolyte in S7 is a 1 mol / L LiPF6 electrolyte with a solvent ratio of EC:EMC=3:7; the electrolyte is injected using a vacuum injection machine with a vacuum degree of -0.095MPa, an injection volume error of ±0.1mL, and a standing time of 30min; the diaphragm is a polyethylene (PE) diaphragm with a thickness of 16μm and a porosity of 40%-45%.

8. The method for preparing a vortex electromagnetic field supercell according to claim 1, characterized in that: The S8 formation process uses a conventional lithium battery formation cabinet. If the positive electrode active material is LFP, the formation voltage is 3.65V; if it is NCM622, the formation voltage is 4.2V, and the charging current is 0.05C. The aging time is 24 hours, and the battery is left to stand at room temperature. After formation, the battery capacity consistency is ≥98%, the internal resistance is ≤30mΩ, and there is no gas expansion or leakage.