422results about "Electrode extrusion" patented technology

A slot die coater is configured to discharge a coating material onto a surface of a substrate, and may include: a first die having a first surface; a second die having a second surface facing the first surface; and a shim plate interposed between the first surface of the first die and the second surface of the second die to form a slot through which the coating material is discharged. The second die may include a pair of guide lips protruding from both ends of the opening of the slot toward the substrate. An electrode coating device including the slot die coater is configured to coat an electrode substrate using the slot die coater.

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

A dual slot die coater including a lower slot and an upper slot, for extrusion coating of an electrode active material slurry on a surface of a continuously moving current collector. The dual slot die coater includes a lower plate, an intermediate plate positioned on the lower plate and an upper plate positioned on the intermediate plate, the lower slot being formed between the lower plate and the intermediate plate, and the upper slot being formed between the intermediate plate and the upper plate, wherein the lower plate, the intermediate plate and the upper plate have a lower die lip, an intermediate die lip and an upper die lip, each forming an front end with respect to the current collector, respectively, and a thickness of the lower die lip is larger than a thickness of the upper die lip and a thickness of the intermediate die lip.

Provided are an electrode sheet manufacturing device and an electrode sheet manufacturing method, relating to the field of batteries. The electrode sheet manufacturing device comprises a first extrusion mechanism, a second extrusion mechanism, a membrane forming mechanism, and a compounding mechanism. The first extrusion mechanism is used for extruding a material and a slurry into a bulk material. The second extrusion mechanism is disposed downstream of the first extrusion mechanism and is used for extruding the bulk material into a blank material. The membrane forming mechanism is disposed downstream of the second extrusion mechanism and is used for thinning the blank material into a membrane. The compounding mechanism is disposed downstream of the membrane forming mechanism and is used for compounding the membrane and a base material to form an electrode sheet. According to the electrode sheet manufacturing device, a material and a slurry are extruded into a bulk material by means of the first extrusion mechanism, and the material and the slurry can be mixed uniformly. The electrode sheet manufacturing device is used to manufacture an electrode sheet, the uniformity of an active substance layer is good, the performance of the electrode sheet is excellent, and manufacturing efficiency is high.

Embodiments described herein generally relate to semi-solid suspensions, and more particularly to systems and methods for preparing semi-solid suspensions for use as electrodes in electrochemical devices such as, for example batteries. In some embodiments, a method for preparing a semi-solid electrode includes combining a quantity of an active material with a quantity of an electrolyte to form an intermediate material. The intermediate material is then combined with a conductive additive to form an electrode material. The electrode material is mixed to form a suspension having a mixing index of at least about 0.80 and is then formed into a semi-solid electrode.

The present disclosure provides a secondary battery mixture that has good properties, a secondary battery mixture sheet containing the mixture, and a secondary battery using the secondary battery mixture sheet. The secondary battery mixture contains a solid-state electrolyte and / or electrode active material, and a binder, wherein the binder is a fibrillatable resin having a fibrous structure with a fibril diameter (median value) of 100 nm or less, and is contained in the secondary battery mixture in an amount of 0.3% by mass or more and 8% by mass or less.

An apparatus for manufacturing an electrode of a secondary battery, includes: a storage unit to store a slurry; a die coater connected to the storage unit, and to discharge the slurry onto a substrate; a supply unit connected to the storage unit and the die coater, and to supply the slurry from the storage unit to the die coater; a slurry measuring unit to measure a density and a flow rate of the slurry supplied from the supply unit; and a controller to control the supply unit based on the density and the flow rate of the slurry transmitted from the slurry measuring unit.

A dry powder kneading apparatus includes a main body including an inner space into which a mixture containing an active material, a conductive material, and a binder is supplied, and a screw inside the inner space of the main body, the screw being configured to move the mixture in one direction and to knead the mixture into fiberized dry powder, and a rotation torque of the screw being 1.4 kgf·m to 42 kgf·m.

A method for producing structured electrodes comprises extruding a mixture comprising an active material, a conductive additive, a binder, and a solvent from an extruder to form an active material layer; laminating the active material layer and a current collector; and structuring the active material layer using a structured roller comprising a variety of protrusions forming a variety of features extending into the active material layer.

Systems and methods are provided herein for applying sacrificial material to otherwise uncoated areas of a foil to provide uniform pressure during calendering. For example, one or more portions of a foil may be coated with an active material while other portions of the foil may be coated with an appropriately selected alternate material. After the active material and the alternate material are applied to the foil, the foil may be dried and then calendered. During calendering, the compressive force of the rollers can cause the portion of the foil coated in the active material to stretch a similar amount to the portions of the foil coated in the alternate material. The resulting calendered web has minimal wrinkles due to the similarity of the stretching of the foil coated in the active material and the foil coated in the alternate material.

A die coater includes a first block having an insulating liquid inlet and a second block on the first block. A shim assembly is interposed between the first block and the second block and configured to form a first slit and a second slit separated from each other. The first block includes a fixing portion having a fixing flow path therein that is a transfer path for insulating liquid flowed in through the insulating liquid inlet, and also includes a lip block configured to be coupled to and detachable from the fixing portion and being a front end of the first block. The lip block has an insulating liquid flow path that is connected to the fixing flow path, and is a transfer path for insulating liquid flowed in through the fixing flow path.

The battery material production device (200) according to this disclosure has receiving ports (210), spreading parts (220), a joining part (230), and an output port (240). The receiving ports (210) each continuously receive a plurality of different compositions in fluid form. The spreading parts (220) guide each of the injected compositions in the output direction while spreading the compositions in a direction orthogonal to the output direction. The joining part (230) joins the plurality of compositions in layers and guides the product in the output direction. The output port (240) is a slit-shaped opening capable of continuously outputting as an output product the plurality of compositions that have been integrated by spreading and joining.

The present disclosure relates to a composite electrode comprising polymer with carbon particles percolated by gallium or a gallium-indium alloy, and a stretchable battery comprising: a cathode electrode comprising silver oxide and styrene-isoprene block copolymer (Ag2O-SIS) and a cathode current collector; an anode electrode comprising a gallium, carbon, and a polymer and an anode current collector; wherein each of the cathode current collector and the anode current collector comprise: a first current collector of a composite comprising liquid metal eutectic gallium-indium (EGaln), silver (Ag), and styrene-isoprene block copolymer (SIS); and a second current collector a second layer of carbon black (CB) and styrene-isoprene block copolymer (SIS). The disclosure also discloses a method to obtain said composite electrode and said stretchable battery.

The invention discloses electrode forming equipment and a coating method.The electrode forming equipment comprises a double-cone extrusion mechanism, a double-steel-belt calendering mechanism, an edge cutting mechanism, a four-roller mechanism and a winding and unwinding mechanism, the double-cone extrusion mechanism is used for mixing and extruding materials, the double-steel-belt calendering mechanism is used for calendering the extruded materials into membranes, and the four-roller mechanism is used for winding and unwinding the membranes; the edge cutting mechanism is used for trimming the edge of a diaphragm, the four-roller mechanism is used for carrying out secondary thinning work on the diaphragm and compounding the diaphragm with a current collector, the winding and unwinding mechanism is used for carrying out winding and unwinding work on a compounded pole piece, and the coating method comprises the following steps of S1, material treatment; s2, preliminarily forming a film; s3, trimming the membrane; s4, carrying out secondary thinning; s5, compounding the surface A; s6, rolling a semi-finished product; s7, unwinding a semi-finished product; s8, compounding the surface B; and S9, rolling a finished product. The film forming quality of the film can be improved, the film forming consistency and uniformity are ensured, the requirement for the compression roller is reduced, and the service life of the compression roller is prolonged.

The present invention relates to a porous electrode for use in electrical energy storage or production devices, such as a lithium ion battery. Said porous electrode is a porous layer comprising at least an active electrode material P and an electronic conductive oxide material.

Embodiments described herein relate generally to semi-solid electrodes, and methods of producing the same. In some embodiments, a method of forming a semi-solid electrode can include mixing an active material, a conductive material, and an electrolyte solvent to produce a semi-solid material. The electrolyte solvent is free of electrolyte salt. The method further includes dispensing the semi-solid material onto a current collector and wetting the semi-solid material with an electrolyte solution to form the semi-solid electrode. In some embodiments, the wetting can be via spraying. In some embodiments, the electrolyte salt can have a concentration in the electrolyte solution of at least about 1 M, at least about 2 M, or at least about 3 M. In some embodiments, the solvent can include ethyl methyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), gamma-Butyrolactone (GBL), or any combination thereof.

The present invention provides a slot die coater that improves distortion of a die block caused by internal pressure. The slot die coater of the present invention includes an upper plate and a lower plate that are combined with each other to form an outlet, and a shim that is interposed between the lower plate and the upper plate to form a slot that communicates with the outlet, the upper plate having a groove that is parallel to the shim and extends into the upper plate above the slot, and further including a taper block and a pressing bolt that are inserted into the groove to press the shim.

The present invention relates to an apparatus for manufacturing a negative electrode for a secondary battery and a method for manufacturing a negative electrode using the same. The negative electrode manufacturing device comprises an upper block, a middle block and a lower block, and a double-groove mold including a first groove and a second groove for discharging the negative electrode slurry through each gap between the upper block and the middle block and between the middle block and the lower block, in which an upper lip, a middle lip, and a lower lip are located at tips of the corresponding blocks, the upper lip and the lower lip are configured to apply magnetic fields of the same polarity, and the first groove and the second groove are configured to receive the negative electrode slurry. And the middle lip portion is configured to apply a magnetic field opposite to the upper lip in polarity. Therefore, the carbon-based negative electrode active material in the discharged negative electrode slurry can be applied, so that the crystal face is oriented to be approximately perpendicular to the surface of the negative electrode current collector. Therefore, the manufactured negative electrode has excellent directionality of the carbon-based negative electrode active material and has the advantage of being easily applied to a large-scale production process.

A slot die coater includes an intermediate block, a first block facing one side of the intermediate block, a second block facing an opposite side of the intermediate block, a first spacer between the first block and the intermediate block, the first spacer having a first discharge port, and a second spacer between the second block and the intermediate block, the second spacer having a second discharge port, wherein a pair of first inner surfaces on opposite sides of the first discharge port, respectively, have first protruding lines extending along a lengthwise direction of the first discharge port, each of the first protruding lines having a first height.

Disclosed is a slot die coater that improves die block deformation due to internal pressure. A slot die coater of the present disclosure includes an upper plate and a lower plate assembled with each other to form a discharge port; and a shim interposed between the lower plate and the upper plate to form a slot communicating with the discharge port, wherein the upper plate has a groove recessed into the upper plate parallel with the shim above the slot, and further includes a taper block and a pressure bolt fitted into the groove to press the shim.

A system for applying material is provided. The system includes a die and a flow guide. The die includes an opening and a cavity in communication with the opening. The die is configured to extrude material in a primary application direction through the opening. The flow guide is disposed within the cavity and configured to shape a flow of material extruded by the die. The flow guide includes a flow narrowing portion and a flow shaping portion. The flow narrowing portion extends in a width direction perpendicular to the primary application direction to block material flow in the primary application direction. The flow shaping portion extends downstream from the flow narrowing portion in the primary application direction. The width of the flow shaping portion is less than or decreases from the width of the flow narrowing portion.

The present invention relates to a method for manufacturing such components, the components that can be obtained by this method, and the use of these components in the manufacture of an electrochemical cell with a liquid organic electrolyte.

A method for producing an alkali metal coated current collector for a battery, wherein the method comprises melting the alkali metal, removing impurities floating on the surface of the molten alkali metal, and applying the purified molten alkali metal to the surface of at least one side of a passing current collector substrate to form a coating on the current collector substrate.A system for manufacturing an alkali metal-coated current collector for a battery comprises at least one extruder, a melting chamber, an inlet extending into the melting chamber, at least one feed roller in the inlet for feeding alkali metal introduced into the inlet into the melting chamber; a heater for melting alkali metal in the melting chamber; an opening in the chamber for removing impurities floating on the molten alkali metal in the melting chamber; an outlet extending from the melting chamber to a discharge opening; a reservoir for receiving molten alkali metal; and at least one drive roller for driving a current collector substrate past the reservoir to receive a coating of molten alkali metal.

The present disclosure relates to an apparatus and a method for manufacturing an electrode of a secondary battery. The apparatus comprises: a storage unit for storing slurry; a mold coater connected to the storage unit and discharging the slurry onto the substrate; a supply unit connected to the storage unit and the mold coating machine and supplying the slurry from the storage unit to the mold coating machine; a slurry measuring unit that measures the density and flow rate of the slurry supplied from the supply unit; and a controller that controls the supply unit on the basis of the density and flow rate of the slurry transmitted from the slurry measurement unit.

A process for producing biscuits (25) of a cathode mixture, which involves introducing into an extruder (42) all the materials (41) required in the cathode mixture, including the secondary electrolyte, all the materials being in particulate form, and operating the extruder (42) while heating the mixture to above the melting point of the secondary electrolyte. The materials required typically comprise a metal powder such as nickel or iron, sodium chloride, and aluminium powder; and the secondary electrolyte is sodium aluminium chloride (NaAlCl4). These materials may all be in powder form. The extruded mixture is used to form biscuits (25). Such biscuits may be used in an electrochemical cell (10).

The application provides a membrane preparation device, a pole piece manufacturing equipment and a membrane preparation method. The membrane preparation device comprises a mixing mechanism, a first feeding mechanism, a second feeding mechanism and an extrusion die. The first feeding mechanism is used for adding a powder mixture containing a powder and a first binder into the mixing mechanism. The second feeding mechanism is used for adding a solution containing a second binder into the mixing mechanism. The mixing mechanism is used for mixing the powder mixture and the solution. The extrusion die is connected to the discharge end of the mixing mechanism and is used for extruding a membrane. When the membrane preparation device is applied to the preparation of an active material layer membrane of a pole piece, the mixing uniformity and the distribution uniformity of the active material mixture can be effectively improved, and the proportion of the active material can be increased. Therefore, the production quality of the pole piece is effectively improved, and the energy density of the battery is effectively improved.

To provide a battery having high energy density and having more stable cycle performance.SOLUTION: In one example, a positive electrode plate includes a positive electrode current collector, and a positive electrode active material layer provided on one side or both sides of the positive electrode current collector. The positive electrode active material layer includes a first active material layer and a second active material layer. The first active material layer is positioned in an intermediate region in a longitudinal direction on a surface of the positive electrode current collector. The second active material layer is positioned on both side edge parts in the longitudinal direction on the surface of the positive electrode current collector or the second active material layer is positioned at a periphery of a surface of the positive electrode current collector. The first active material layer includes a first active material, and the second active material layer includes a second active material. The gram capacity of the first active material is higher than that of the second active material. The positive electrode plate according to the present invention can improve the lithium precipitation problem in a negative electrode plate edge part and a battery including the positive electrode plate has higher energy density and more stable cycle performance.SELECTED DRAWING: Figure 1

A slot die coater according to the present invention is a slot die coater having a slot for ejecting a coating solution, in the direction opposite to gravity, onto the surface of a substrate continuously driven and transferred by a coating roll, the slot die coater comprising a first die block and a second die block which form the slot therebetween, wherein the center of the rotation axis of the coating roll is located closer to the second die block than the upper part of a first die lip forming the front end part of the first die block with respect to the substrate.

A dual slot die coater according to the present disclosure is a dual slot die coater including a lower slot and an upper slot, for extrusion coating of an electrode active material slurry on a surface of a continuously moving current collector through at least one of the lower slot or the upper slot, and the dual slot die coater includes a lower plate, an intermediate plate positioned on the lower plate and an upper plate positioned on the intermediate plate, the lower slot being formed between the lower plate and the intermediate plate, and the upper slot being formed between the intermediate plate and the upper plate, wherein the lower plate, the intermediate plate and the upper plate have a lower die lip, an intermediate die lip and an upper die lip, each forming an front end with respect to the current collector, respectively, and a distance between the current collector and the lower die lip is larger than a distance between the current collector and the upper die lip and a distance between the current collector and the intermediate die lip.

An apparatus for manufacturing an electrode of a secondary battery, includes: a storage unit configured to store a slurry; a die coater connected to the storage unit, and to discharge the slurry onto a substrate; a supply unit connected to the storage unit and the die coater, and to supply the slurry from the storage unit to the die coater; a slurry measuring unit to measure a density of the slurry supplied from the supply unit; and a controller to control the supply unit based on the density of the slurry transmitted from the slurry measuring unit.