144results about "Electrode molding" patented technology

The invention discloses a novel lithium battery pole piece coating machine, which belongs to the technical field of coating machines, and comprises a coating machine body, and an unwinding device, a scratch monitoring device, a tensioning device, a sectional rolling assembly, a cutter assembly, a continuous rolling assembly, a coating assembly and a winding device which are sequentially arranged in the winding direction of a pole piece from front to back, the scratch monitoring device comprises a supporting rod fixed to the coating machine body, the length direction of the supporting rod is consistent with the width direction of the pole piece, and a plurality of linear array cameras are evenly arranged on the lower side of the supporting rod in the length direction at intervals; the sectional type rolling assembly comprises a main motor, an output shaft and a pressing roller, the output shaft comprises multiple sections of supporting shafts which are sequentially connected in the axial direction, and the two ends of each supporting shaft are connected with a first hinge joint and a second hinge joint correspondingly. According to the lithium battery pole piece coating device, protrusions and recesses on the surface of the lithium battery pole piece can be treated in time, and the uniformity of the subsequent pole piece during coating is improved.

The invention discloses a low-porosity and low-impedance dry positive electrode of a solid-state battery and a preparation method of the low-porosity and low-impedance dry positive electrode. The dry positive electrode of the solid-state battery comprises a large-particle positive electrode active material, a small-particle positive electrode active material, a first conductive agent, a second conductive agent, a third conductive agent, a small-size sulfide solid electrolyte, a large-size sulfide solid electrolyte and a binder. All the components are mixed in a manner of size matching and step-by-step embedding. Size matching among multi-stage particles is introduced, so that the size of gaps among different components is reduced, and the porosity is reduced; the binding agent and part of the conductive agent are premixed to form a'binding-conductive double network ', and then the active material and the electrolyte are gradually embedded, so that the purpose of low impedance of the composite positive electrode is achieved. And finally, the rate capability and the cycling stability of the solid-state battery are improved.

The invention relates to the technical field of batteries, in particular to an electrode assembly, a preparation method and a lithium ion battery, the electrode assembly comprises a positive pole piece, a negative pole piece and a diaphragm, the positive pole piece comprises a positive current collector and a positive active material layer, and the positive active material layer comprises a positive active material layer and an inorganic coating; the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material comprises a ternary positive electrode material of which the core nickel content is more than 80 at% and the shell manganese content is 10-20 at%; the negative active material comprises silicon-based active particles and a three-dimensional elastic conductive network layer coating at least part of the surface of the silicon-based particles, and the positive active material and the negative active material are improved, so that various properties of the electrode assembly are good and stable, the overall electrical property and safety of the battery are improved, and the cycle life of the battery is prolonged.

The application discloses a coating system and a coating method. The coating system determines a target roll to be wound based on state parameters of each chuck in a winding device for clamping the roll; and controls the winding device to change the roll in order to wind the material by the target roll when it is determined that the current coating process parameters meet the roll changing condition. The state parameters of each chuck, the coating process parameters and the roll changing condition are used to automatically switch the winding device to wind the material by the target roll, thereby greatly improving the automation degree of roll changing.

The embodiment of the invention provides a preparation method of a high-load electrode with a vertical pore channel structure and a battery, which comprises the following steps: grinding and premixing carbon fluoride and a conductive carbon material in proportion, adding a binder, carrying out high-speed ball milling to obtain fiberized powder, and rolling to prepare an electrode material, thereby obtaining the high-load electrode with the vertical pore channel structure. Compounding the carbon fluoride with a current collector through hot rolling to obtain a positive pole piece; and finally, carrying out laser pore-forming treatment on the positive pole piece to obtain the high-load carbon fluoride electrode with a vertical pore channel structure. The pore diameter of the pore channel structure is 10-100 [mu] m, the pore pitch is 1-10 times of the thickness of the electrode material, the pore depth is 50-100% of the thickness of the electrode material, the ion tortuosity of the electrode is effectively reduced and the ion transmission efficiency is improved by constructing a vertical pore channel, meanwhile, high-energy laser induces an in-situ defluorination reaction on the pore wall to generate a high-conductivity sp2 carbon phase, and the conductivity of the electrode is improved. And the limitation of sacrifice conductivity of a mechanical pore-forming technology is broken through.

This invention discloses a method for preparing a self-supporting silicon-carbon electrode sheet, comprising the following steps: preparation of expanded graphite, nitrogen doping, pore formation, silicon composite, and molding. Its innovation lies in: through the porous design of the nitrogen-doped expanded graphite matrix, combined with in-situ silicon coating and integrated molding process, an integrated electrode sheet with a three-dimensional elastic conductive network is constructed. By doping expanded graphite with nitrogen, the wettability of the electrode sheet to the electrolyte can be improved. The pores in the expanded graphite can serve as ion transport channels between graphite layers. Then, utilizing the microscopic two-dimensional sheet structure of expanded graphite, direct molding is achieved to realize efficient composite of graphite and silicon and complete the preparation of the negative electrode sheet in one step. This results in a breakthrough electrode sheet thickness reaching the 1mm level (far exceeding the tens of micrometers level of traditional current collectors), while also possessing high rate performance and excellent cycle stability. The three-dimensional structure maintains electrode integrity through a mechanical interlocking effect, and the structure has a certain degree of elasticity, allowing the material to maintain structural stability during repeated expansion / contraction caused by charging and discharging, significantly improving capacity retention.

This application discloses a coating system and a coating method. The coating system determines a target reel to be wound based on state parameters of chucks for clamping reels in a winding apparatus (11); and when it is determined that current coating process parameters satisfy a reel change condition, the winding apparatus (11) is controlled to change reels to wind a material using the target reel. Through the state parameters of the chucks, the coating process parameters, and the reel change condition, automatic switching to the target reel for winding the material in the winding apparatus is achieved, significantly improving the automation level of reel change.

This invention provides a low-resistivity negative electrode for an all-solid-state secondary battery, a method for manufacturing the same, and an all-solid-state secondary battery using the aforementioned negative electrode. This invention relates to Sustainable Development Goals (SDGs) 12, 3, 7, and 11. The all-solid-state negative electrode of this invention is characterized by having a molded body containing a negative electrode mixture comprising a negative electrode material including a negative electrode active material and a solid electrolyte. The negative electrode material contains a carbon material having a layer of an oxide with lithium-ion conductivity formed on its surface as the negative electrode active material, wherein the amount of the oxide is 1 part by mass or more relative to 100 parts by mass of the carbon material, and a sulfide-based solid electrolyte is included as the solid electrolyte. Furthermore, the all-solid-state secondary battery of this invention is characterized by having a positive electrode, a negative electrode, and a solid electrolyte layer between the positive and negative electrodes, thus forming the negative electrode of this invention.

The invention provides an all-solid-state positive pole piece as well as a preparation method and application thereof. The all-solid-state positive pole piece at least comprises a current collector, a positive pole piece and a negative pole piece, the all-solid-state positive electrode layer is at least arranged on one surface of the current collector, the all-solid-state positive electrode layer comprises a positive electrode active material and a solid-state electrolyte, the median particle size X of the solid-state electrolyte is 20-50 microns, and the ion transmission tortuosity in the all-solid-state positive electrode plate is 3-5. According to the all-solid-state positive pole piece as well as the preparation method and the application thereof provided by the invention, the ion transmission tortuosity in the positive pole piece can be reduced, so that the rate capability and the cycle performance of an all-solid-state battery are improved.

A method of manufacturing an all-solid-state battery includes forming an anode active material layer on surfaces of an anode current collector, forming a first solid electrolyte layer covering exposed surfaces of the anode active material layer to form a symmetrical electrode structure, pressing the structure at a preliminary pressing pressure lower to form an anode, forming a cathode active material layer on a surface of cathode current collectors, the cathode active material layer being smaller than the cathode current collectors, forming a second solid electrolyte layer covering the cathode active material layers and the cathode current collectors to form first and second cathodes, forming a laminate by laminating the cathodes on opposite surfaces of the anode, the second solid electrolyte layers of the cathodes facing the anode, and pressing the laminate at the final pressing pressure.

This disclosure relates to an active material structure, an electrode structure therein, a secondary battery therein, and a method for manufacturing the same. The active material structure includes a first active material line arranged in a first direction, a second active material line arranged in a second direction intersecting the first direction, and an intermediate active material line between the first and second active material lines in a third direction intersecting the first and second directions. The intermediate active material line is provided in the overlapping region of the first and second active material lines, wherein the upper and second active material lines are electrically connected via the intermediate active material line.

A sulfur-carbon composite comprising a porous carbon material, a coating layer on a surface of the porous carbon material, said coating layer comprising a compound with electrolyte solution impregnation property, and sulfur, a method for preparing the same, and a positive electrode for a lithium-sulfur battery and a lithium-sulfur battery comprising the same.

Provided are: a negative electrode for an all-solid-state secondary battery, which has a low resistance value; a method for producing the negative electrode; and an all-solid-state secondary battery. The present invention relates to targets 12, 3, 7, 11 of sustainable development targets (SDGs). This negative electrode for an all-solid-state secondary battery is characterized by comprising a molded body of a negative electrode mixture containing a solid electrolyte and a negative electrode material containing a negative electrode active material, the negative electrode material containing, as the negative electrode active material, a carbon material having, on the surface thereof, a layer containing an oxide having lithium ion conductivity. The carbon material contains hard carbon, the oxide contains a lithium titanium oxide, the amount of the oxide is 1 part by mass or more with respect to 100 parts by mass of the carbon material, a sulfide-based solid electrolyte is contained as the solid electrolyte, and the thickness of a molded article of the negative electrode mixture is 200 [mu] m or more and 3000 [mu] m or less.

This invention discloses an automated leveling system and method for tabs of soft-pack battery modules, belonging to the field of new energy vehicles. The leveling system includes a frame, a battery module walking device, a servo motor, an ultrasonic welding machine, and a PLC control panel. The battery module walking device includes multiple mounting platforms mounted on sliders, driven by lead screws. The mounting platforms are used to fix the battery modules with tabs to be leveled. The ultrasonic welding machine is located above the battery module walking device and its operation is controlled by the PLC control panel. This invention can flexibly set relevant control programs according to the different number of tabs to be leveled for different battery modules. By setting the pressure of the welding head falling, the efficiency of tab leveling is maximized. This invention can effectively level the small burrs left during tab punching, thereby ensuring the flatness of the tab-bus fit.

This method for manufacturing an electrode mixture 1 comprises: forming composite particles 8 by adhering a conductive material 6 to an electrode active material 4; forming a mixture 14 by mixing the composite particles 8 with a grain aggregate 12 of fibrous binders 10; and fibrillation the grain aggregate 12 in the mixture 14 by applying shear force to the grain aggregate 12, whereby an agglomerate 16 is formed in which a plurality of the composite particles 8 are coupled by the fibrous binders 10.

Provided are: a negative electrode for an all-solid-state secondary battery, which has a low resistance value; a method for producing the negative electrode; and an all-solid-state secondary battery. The present invention relates to targets 12, 3, 7, 11 of sustainable development targets. The negative electrode for an all-solid-state secondary battery is characterized by comprising a molded body of a negative electrode mixture containing a solid electrolyte and a negative electrode material containing a negative electrode active material, the negative electrode material containing, as the negative electrode active material, a carbon material having, on the surface thereof, a layer containing an oxide having lithium ion conductivity. The carbon material contains at least one of graphite and hard carbon, the oxide contains at least one of lithium niobium oxide, lithium titanium oxide and lithium phosphorus oxide, the amount of the oxide is 1 part by mass or more with respect to 100 parts by mass of the carbon material, and a sulfide-based solid electrolyte is contained as the solid electrolyte. The thickness of the molded body of the negative electrode mixture is 200 [mu] m or more and 3000 [mu] m or less.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and / or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and / or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

A method of manufacturing a film notching mold for a secondary battery pouch includes processing each of an upper plate, a lower plate, a plurality of paired upper modules, a plurality of paired lower modules, a rounded press-fit plate, and an interference-fit portion in a polyhedral frame shape in the form of a metal plate; coupling each of the upper plate, the lower plate, the plurality of paired upper modules, the plurality of paired lower modules, the rounded press-fit plate, and the interference-fit portion by interference-fit; and performing linear driving-type pressing by forming a press-fit space.

A purpose of the present invention is to provide a method for manufacturing, etc., a member for an electrochemical device in which the problem of unavoidable change in the composition of the electrochemical device due to solvent depletion, moisture absorption, etc., during manufacturing of the electrochemical device is unlikely to occur. This method for manufacturing a member for an electrochemical device includes performing at least one molding operation disclosed in the present specification on a formation material composition that: includes at least one filling agent (F), a plasticizer (P-S) that is water, an ionic liquid, or a mixture of these, and a polymer (P1); does not substantially include an organic solvent; and has plasticity and is self-supporting.

A method for producing a bipolar electrode includes: mixing, under shear, a mixture containing a positive electrode active material or negative electrode active material and a binder resin, and a fibrillizable compound, to respectively prepare a positive electrode powder and a negative electrode powder; rolling the positive electrode powder and the negative electrode powder to respectively form a positive electrode layer and a negative electrode layer; and compressing the positive electrode layer and the negative electrode layer by respectively applying different pressures thereto, to respectively adjust a porosity of the positive electrode layer and a porosity of the negative electrode layer.

Provided are an apparatus for manufacturing an electrode film and an operation method for the same. The apparatus for manufacturing an electrode film may include: a feeder configured to transport mixed powder; a guide groove including a filtering portion configured to pass small particles among the powder dropped from the feeder and leave large particles, and a guide portion guiding the large particles in a given direction; and a roller configured to roll the powder conveyed through the guide portion.

The invention relates to a bipolar electrode and a method for manufacturing a bipolar electrode. The method for manufacturing a bipolar electrode includes: a step for shear-mixing a mixture containing a positive electrode active material or a negative electrode active material and a binder resin with a fiberizable compound to prepare a positive electrode powder and a negative electrode powder, respectively; a step in which the positive electrode powder and the negative electrode powder are rolled to form a positive electrode layer and a negative electrode layer, respectively; and a step in which the positive electrode layer and the negative electrode layer are compressed by applying different pressures to the positive electrode layer and the negative electrode layer, respectively, and the porosity of the positive electrode layer and the porosity of the negative electrode layer are adjusted, respectively.

To provide a method and / or apparatus for manufacturing an electrode with a substrate and with a dry film.SOLUTION: The disclosure relates to a method for manufacturing an electrode 4 with a substrate 30 and with a first dry film 22, wherein to form the first dry film 22, solvent-free dry film material is brought into a first roller gap 18 formed between a first roller 6 and a second roller 8. The first dry film 22 formed in the first roller gap 18 is roller-conveyed into a second roller gap 24 formed between the second roller 8 and a third roller 10 and compressed in the second roller gap 24. For laminating, the compressed first dry film 22 and the substrate 30 are conveyed into a third roller gap 26 formed between the third roller 10 and a fourth roller 12, where the first dry film 22 is roller-conveyed into the third roller gap 26.SELECTED DRAWING: Figure 2

Provided are a method and apparatus for calibrating contact parameters of electrode materials, and a computer storage medium. The method includes the following operations. A discrete element simulation test is performed on an electrode material based on a calibration model and calibration ranges of contact parameters of the electrode material when an axial force-displacement curve of a target pellet of the electrode material meets an adaption condition of the contact model; then a simulated axial pressure-axial strain relationship of the electrode material is acquired based on a target discrete element simulation parameter of the electrode material; whether the contact parameters are calibrated successfully is judged based on this relationship; and when the contact parameters are calibrated successfully, calibration results of the contact parameters are determined.

The invention provides a continuous preparation method and system for a dry electrode with a gradient pore structure, and the method comprises the steps: S1, calculating the gradient pore distribution parameters of a dry electrode coating through a finite element design model, and enabling the gradient pore distribution parameters to be used for the pore control of the dry electrode coating in the thickness direction; s2, conveying a surface layer feed, a middle layer feed and a bottom layer feed to the dry-method electrode coating by a partition feeding device according to the gradient pore distribution parameters, wherein the surface layer feed, the middle layer feed and the bottom layer feed are sequentially distributed in the thickness direction of the dry-method electrode coating; and S3, the gradient calendering device receives the dry-method electrode coating, and the gradient calendering device executes gradient calendering on the dry-method electrode coating through the roll gap dynamic adjusting system to form a gradient pore structure. Precise control over the porosity gradient in continuous production is achieved, so that the electrode energy density, the ion transmission efficiency and the structural stability are balanced, the cycle life of the battery is prolonged, and the rate capability and the safety of the battery are improved.

The application discloses a low-porosity and low-resistance solid-state battery dry-method cathode and a preparation method thereof. The composition of the solid-state battery dry-method cathode comprises large-particle positive electrode active material, small-particle positive electrode active material, first conductive agent, second conductive agent, third conductive agent, small-size sulfide solid-state electrolyte, large-size sulfide solid-state electrolyte and binder. The components are mixed through size matching and gradual embedding. By introducing size matching among multistage particles, the size of gaps among different components is reduced, and the porosity is reduced. The binder and part of the conductive agent are premixed to form a "binder-conductive double network", and then the active material and the electrolyte are gradually embedded to realize the low-resistance purpose of the composite cathode. Finally, the rate performance and cycle stability of the solid-state battery are improved.

To provide a manufacturing method of a battery capable of suppressing intrusion of foil sagging and burrs between layers of an electrode laminate in a cutting process of the electrode laminate.SOLUTION: A method for producing a battery including a positive electrode current collector, a positive electrode layer, a solid electrolyte layer, a negative electrode layer, and a negative electrode current collector in this order, the method including a step of preparing an electrode laminate in which the positive electrode current collector, the positive electrode layer, the solid electrolyte layer, the negative electrode layer, and the negative electrode current collector are laminated, and a step of cutting the electrode laminate in a state where the electrode laminate is fixed by a jig in a lamination direction of the electrode laminate, the jig has an elastic body in a region facing at least a part of the thin layer region.SELECTED DRAWING: Figure 2

A long cycle all-solid-state battery without external pressure and a silicon negative electrode and a preparation method thereof, which utilizes Li 21 Si5 alloy low Young's modulus characteristics, under high stacking pressure to induce Li 21 Si5 alloy stress sintering phenomenon, get dense, integrated alloy negative electrode. At the same time, the use of Li 21 Si5 alloy high electron / ion conductive characteristics, the construction of the negative electrode upper layer of the electronic / ion double conductor layer (Li 21 Si5) and the lower layer of the mixed three-dimensional conductive layer (Si-Li 21 Si5). The structure provides a uniform electric field for the negative electrode of the all-solid-state battery, disperses the cycle expansion stress of Si evenly at the bottom of the negative electrode, stabilizes the interface between the solid electrolyte and the negative electrode, reduces the side reaction, and thus realizes the super-high initial efficiency and stable long cycle performance of the all-solid-state battery without external pressure.

To provide a method of manufacturing an electrode using a granulated material with improved spreadability.SOLUTION: A method of manufacturing an electrode includes the steps of: preparing a granulated material 10 containing an electrode active material, a binder, and a solvent; compressing the granulated material between a pair of rolls 31, 32, to form an electrode composite layer 12; and placing the electrode composite layer on an electrode current collector 13. At least one of the pair of rolls has a temperature of 40°C. or higher.SELECTED DRAWING: Figure 2

The application relates to a preparation method of a lithium battery-structure integrated composite material, and belongs to the technical field of lithium battery preparation. The method comprises the following steps: uniformly mixing epoxy resin, a diluent, a curing agent 1 and a lipophilic emulsifier to obtain dispersion liquid 1; dropping an electrolyte solution into the dispersion liquid 1 at a constant speed, and stirring at a constant temperature and a high speed to obtain a water-in-oil emulsion; uniformly mixing deionized water, a hydrophilic emulsifier and a curing agent 2 at a constant temperature to obtain dispersion liquid 2; adding the water-in-oil emulsion into the dispersion liquid 2, and emulsifying at a high speed to obtain a water-in-oil-in-water emulsion system; performing temperature rising and curing on the water-in-oil-in-water emulsion system; performing centrifugation, washing and drying after curing to obtain a solid nanometer adhesive; grinding the solid nanometer adhesive, and then uniformly coating the solid nanometer adhesive in a mold for high-temperature treatment to obtain a lithium battery diaphragm. The electrolyte solution is selected as an inner water phase of the water-in-oil emulsion, the internal osmotic pressure of the emulsion can be increased, fusion between the emulsions can be prevented, and the particle size is increased.