257results about "Electrode rolling/calendering" patented technology

Disclosed are an apparatus for manufacturing an electrode and a method of manufacturing an electrode. The apparatus for manufacturing an electrode includes a roller configured to roll an electrode plate, and the roller is configured to primary roll the electrode plate at a first compression ratio to form a primary electrode plate, secondary roll the primary electrode plate at a second compression ratio to form a secondary electrode plate, and tertiary roll the secondary electrode plate at a third compression ratio to form a tertiary electrode plate.

The present invention relates to an electrode mixture film including a binder having a three-dimensional fiber network structure, and an electrode active material accommodated in the fiber network structure, wherein an R value defined by factors of density and tensile strength of the electrode mixture film is 5.0 to 10.0, and by increasing sheeting completeness of the electrode mixture film, the electrode mixture film may satisfy the range of the R value, through which it is possible to provide an electrode mixture film having excellent mechanical strength and excellent appearance characteristics and allowing a lamination process with a current collector to be stably performed.

A method of kneading an electrode mixture capable of controlling the fiberization state of a binder to improve the characteristics of a dry electrode film, and a method of manufacturing a dry electrode film and a dry electrode including the same are provided. The method of kneading an electrode mixture includes performing a kneading process on the electrode mixture, obtaining a processed image of the electrode mixture on which the kneading process has been performed, determining a fiberization state of the binder included in the obtained processed image, and controlling process conditions of the kneading process based on the determined fiberization state of the binder.

Disclosed is an electrode sheet calender roll including a hard layer formed by physical vapor deposition and a manufacturing method thereof. The manufacturing method of the electrode sheet calender roll according to one embodiment of the present invention is characterized by including: a hard layer forming step of forming a hard layer on a roll core composed of a steel material containing carbon by a PVD method; and a hard layer forming step of polishing the hard layer so that the thickness of the hard layer is different between a center portion and end portions of the calender roll.

The present disclosure provides a secondary battery binder that contains a sulfide-based electrolyte and exhibits favorable properties, a secondary battery binder sheet containing the secondary battery binder, and a solid-state secondary battery using the secondary battery binder sheet. Specifically provided is a secondary battery binder containing a sulfide-based solid electrolyte and a binding agent, said secondary battery binder being characterized in that the binding agent is a fibrillary resin. The binding agent ideally has a fibrous structure with a fibril diameter (median value) of 100 nm or less.

Disclosed are apparatuses and methods for forming films having uniform thicknesses across the entire width of the film. The films are also disclosed. The apparatus for forming the film includes a first nip roller and a second nip roller, each of the first nip roller and the second nip roller being configured to compress the powder as it passes between the first nip roller and the second nip roller and thereby form the film, whereby in the absence of a force counteracting the pressure of the passage of the powder between the first nip roller and the second nip roller the first nip roller is deflected to a greater degree than the second nip roller. Furthermore, the first nip roller and the second nip roller are each associated with one or more eccentric bearings that rotate to apply force vectors to the first nip roller and the second nip roller.

The present disclosure provides a multi-roll calender configured to processing material onto a coating. In particular, the present disclosure provides a multi-roll calender and method with a first roll and a second roll configured to form a first nip, wherein the first roll and the second roll laminate a first film on a first side of a foil in the first nip. The system and method may comprise a third roll and a fourth roll configured to form a second nip between the third roll and the fourth roll, wherein the third roll and the fourth roll laminate a second film on a second side of the foil in the second nip.

An electrode base material comprising: a resin base material; and active material particles and solid electrolyte particles on the resin base material, a particle layer comprising the active material particles and the solid electrolyte particles being formed on the resin base material, wherein, when the particle layer is viewed from a surface side in contact with the resin base material or from a surface side opposite thereto, the solid electrolyte particles are arranged so as to cover at least a part of surfaces of the active material particles, and wherein, in an observation of a cross section of the particle layer with SEM, a difference between the exposed surface area ratio of the active material particles on a specific surface of the particle layer and the exposed surface area ratio on the opposite surface falls within a specific range.

According to an exemplary embodiment of the present invention, a method for saving a roll map is provided. The method includes the steps of: transmitting compressed measurement data to a server, wherein the compressed measurement data is generated by processing measurement data collected by measuring an electrode sheet; modifying the compressed measurement data to generate modified measurement data; and saving the modified data, wherein the compressed measurement data includes a first measurement start coordinate, a first measurement end coordinate, a first representative value of a first interval defined by the first measurement start coordinate and the first measurement end coordinate, a second measurement start coordinate, a second measurement end coordinate, and a second representative value of a second interval defined by the second measurement start coordinate and the second measurement end coordinate, wherein the first measurement start coordinate and the second measurement start coordinate are the same.

A negative electrode (12) according to an embodiment of the present invention comprises: a negative electrode core (40); and a negative electrode mixture layer (41) that is positioned on the negative electrode core (40), the negative electrode mixture layer (41) containing a negative electrode active material (50) and a water-soluble polymer (51). The water-soluble polymer (51) is present such that an amount of 0.50 mass % or more relative to the negative electrode active material (50) is adsorbed onto the negative electrode active material (50), and an amount of 1.05 mass % or less is separated from the negative electrode active material (50). The negative electrode active material (50) includes a carbon material and a silicon-containing material.

A method of the present disclosure for producing an electrode active material sheet includes providing an electrode mixture comprising active material particles, a binder, and ethylene carbonate, and pressing the electrode mixture with a press member, wherein pressing the electrode mixture with the press member includes at least partially melting the ethylene carbonate.

The present invention proposes a positive electrode for a secondary battery, the positive electrode including a positive electrode current collector and a positive electrode mixture layer on the positive electrode current collector, the positive electrode including: a coated portion at which the positive electrode mixture layer is formed in a uniform thickness; an uncoated portion provided on at least one edge of the coated portion on the positive electrode current collector and at which the positive electrode mixture layer is not formed; and a buffer portion between the coated portion and the uncoated portion, at which the positive electrode mixture layer is formed in a thickness smaller than that of the coated portion.

The present disclosure relates to a dry electrode for an electrochemical device, a method for manufacturing the same, and an electrochemical device including the same, and the electrode according to an aspect of the present disclosure includes a current collector and an electrode film located on at least one surface of the current collector, the electrode film including an active material, a porous filler, a conductive material and a binder, wherein an average particle size (D50) of the porous filler is at least twice as large as an average particle size (D50) of the active material, and a bending resistance of the electrode is 20 mm (Φ) or less.

An electrode manufacturing device includes a transfer part configured to move an electrode coated with an active material, a rolling part configured to roll the electrode, a marking part in front of the rolling part, the marking part configured to make a plurality of mark portions on the electrode, a measurement part configured to measure distances between the mark portions before rolling the electrode and after rolling the electrode, and a control part configured to calculate an extent of elongation by comparing measurement results of the measurement part.

Disclosed herein is a roll press device for performing hot rolling on an electrode coated with electrode active material, wherein, in one example, a pre-heater is disposed upstream of a rolling unit that performs rolling on an electrode transferred in a roll-to-roll manner, and the pre-heater irradiates an infrared laser along a width direction of the electrode surface to heat it as radiant heat.

The application provides a dry-process electrode tab film and a preparation method thereof, and belongs to the technical field of dry-process electrode manufacturing. The dry-process electrode tab film comprises active material particles, conductive agent particles and an adhesive, the adhesive is in a fibrous form, the active material particles comprise large-diameter active material particles and small-diameter active material particles, wherein the particle size D50 of the large-diameter active material particles is 4-10 mu m, the particle size D50 of the small-diameter active material particles is 0.9-1.8 mu m, and the small-diameter active material particles are arranged in an area close to and adhered to the adhesive along the extension direction of the adhesive. The dry-process electrode tab film can have good film-forming property and high compaction density.

A system and method for processing a dry electrode film comprising a roller system, a terahertz measurement device and a dry electrode powder mixture dispenser, are disclosed. The measurement device may comprise a terahertz source and a terahertz sensor. Such terahertz source may be emitted towards an upper and lower surface of the dry electrode film and reflected back towards the terahertz sensor to measure a physical property of the dry electrode film.

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.

An exemplary embodiment provides a secondary battery manufacturing apparatus. The secondary battery manufacturing apparatus includes a calender roller configured to press an electrode sheet, wherein the electrode sheet includes a coated lane coated with an electrode paste and an uncoated portion to which the electrode paste is not applied, and a pinch roller configured to press the electrode sheet, wherein a portion of the electrode sheet pressed by the pinch roller is different from a portion of the electrode sheet pressed by the calender roller, and the pinch roller is configured to press the uncoated portion of the electrode sheet.

Provided are an electrode binder for a rechargeable lithium battery, an electrode manufactured using the electrode binder, and a rechargeable lithium battery. The electrode binder for a rechargeable lithium battery includes a metal salt of hydrophilic amino acid.

According to the present invention, a rechargeable battery, a method for manufacturing the rechargeable battery, and a method for manufacturing an electrode for the rechargeable battery are provided with: a step for forming electrode slurry that includes an electrode active material, amorphous carbon or a carbon fiber, a thickener, and a binder; a step for applying the electrode slurry to a substrate and then drying the same, thereby forming an electrode coating film on the surface of the substrate; and a step for superposing the substrate having the electrode coating film formed on the surface thereof onto one surface of perforated metal foil including a plurality of through-holes, and then applying a pressure thereto, thereby transferring the electrode coating film to the perforated metal foil.

The present invention relates to a method for preparing an expandable carbon nanotube powder, including disaggregating carbon nanotube aggregates via mutual collision in a disaggregation device in a solvent-free state, wherein the disaggregation is performed by the rotation of two or more rotors provided in the disaggregation device and by a high-pressure gas sprayed from a nozzle provided in the disaggregation device, the rotors have a rotation speed of 4100 rpm or greater, and the nozzle sprays the high-pressure gas at a pressure of 3.5 bar or greater.

A current collector including a metal foil, and a primer coating layer formed on at least one surface of the metal foil. A surface roughness (Ra) of the primer coating layer is 0.01 to 1 μm. The primer coating layer may include a carbon-based material and a binder. A surface of the metal foil may have irregularities formed by a rolling of the primer coating layer.

The present invention relates to a lithium-ion battery (LiB) having a binder-free anode comprising an active material and about 1-5% by weight of single wall carbon nanotubes (SWCNT) as a conductive additive, wherein the SWCNT has an inorganic impurity content of less than 10% by weight. The LiB of the present invention having a binder-free anode, provides higher capacity than a LiB having an anode that contains a polymeric binder.

According to an embodiment of the present disclosure, there is provided a doctor blade comprising: a first blade having a first tip including an inclined plane; and a second blade having a second tip including a curved surface, wherein the first blade and the second blade are in contact with each other, wherein an active material is provided on a current collector and can be moved integrally or individually towards a traveling electrode or vice versa.

A dry electrode fabricating apparatus and method are disclosed. A dry electrode fabricating apparatus includes a chute including an inner space in which an electrode powder is accommodated, an inlet port through which the electrode powder is input to the inner space, and an outlet port through which the electrode powder is discharged from the inner space, a pair of calender rolls through which the electrode powder discharged through the outlet port passes and by which the electrode powder is compressed into an electrode film, a temperature sensor to measure a temperature of the chute, a chute moving part, and a controller configured to control the chute moving part such that the chute-calender roll distance becomes greater than a reference distance if the temperature of the chute is higher than or equal to a reference temperature.