200results about "Electrode extrusion" patented technology

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.

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.

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 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 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

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.

A negative electrode manufacturing device for a secondary battery includes a dual slot die having an upper block, a middle block, and a lower block, a first slot provided through a gap between the upper and middle blocks and a second slot provided through a gap between the middle and lower blocks. The first and second slots discharge a first negative electrode slurry. The device further includes a coating roll opposite the first and second slots that transfers an electrode sheet coated with the negative electrode slurry discharged from each slot. The upper block, the middle block, and the lower block include an upper lip, a middle lip, and a lower lip forming an outlet at a front end of each block. The upper and lower lips exhibit a magnetism of a same polarity, and the middle and upper lips exhibit a magnetism having an opposite polarity.

The present invention relates to the field of electrochemical cells, a mother unit and a method for preparing said cells. The electrochemical cells have a structure comprising at least 2 units. Each unit comprises at least one thermoplastic electronically conductive collector layer, at least one anode layer, at least one electrolyte layer and at least one cathode layer.

A manufacturing device of a fiber-type electrode includes: a bath including a coagulant; a transport portion including a supply roll provided outside the bath, a take-up roll provided inside the bath to be immersed in the coagulant, and a winding roll provided outside the bath, and configured to transport a fiber-type substrate; and a nozzle between the supply roll and the take-up roll. The nozzle includes a guide pipe that provides a moving passage of the fiber-type substrate, an inner main body around the guide pipe and that provides a central axis space in which an active material solution is supplied, and an outer main body around the inner main body and that provides a peripheral space in which a polymer solution is supplied.

A method and a device are proposed for manufacturing a ribbon electrode, the ribbon electrode being manufactured comprising a ribbon current collector coated on both sides with a layer of electrode material and having on both sides an area extending along one of its longitudinal edges that is not coated with electrode material, in which a ribbon metal foil (100) is coated with the electrode material in a continuous process, a number of parallel strips (120) of electrode material are applied to a first side of the ribbon metal foil (100) and an equal number of parallel strips (110) of electrode material are applied to a second side of the ribbon metal foil (100), so that in a line of sight perpendicular to the ribbon metal foil (100), in each case one strip on the first side (120) overlaps one of the strips on the second side (110) of the ribbon metal foil (100). On both sides between directly adjacent parallel strips of electrode material (110, 120), non-coated strip-like areas (111, 121) remain free of electrode material. The method is characterized in that the parallel strips of electrode material (110, 120) are simultaneously applied to the first and second sides of the ribbon-shaped metal foil (100).

According to one embodiment of the present disclosure, a free-standing film for dry electrode, comprising: a binder, an active material and a conductive material, wherein the free-standing film has a tensile strength of 2000 gf / cm2 or more based on a thickness of 200 µm.

Provided are a coating die head and a coating apparatus for an electrode sheet. The coating die head is provided with a feed inlet (111), a first flow equalizing cavity (11210), flow channels (11220), and a plurality of coating ports (1410); the first flow equalizing cavity (11210) extends in a first direction and is communicated with the feed inlet (111); the plurality of coating ports (1410) are arranged at intervals in the first direction; and the flow channels (11220) are configured to communicate the first flow equalizing cavity (11210) with the plurality of coating ports (1410). In the direction of the coating ports (1410) moving away from the feed inlet (111), the minimum lengths of the flow channels (11220) between the coating ports (1410) among the plurality of coating ports (1410) and the first flow equalizing cavity (11210) show a decreasing trend.

A slot die coater includes a first die block, a second die block below the first die block, a third die block below the second die block, a first spacer between the first die block and the second die block, the first spacer defining a first slot through which a first slurry is to be discharged, the first spacer including a first base, first and second sub-guides extending from opposite sides of the first base, respectively, in a first slurry discharge direction, and an amount of the first slurry to be discharged from the first slot being determined based on shapes of the first and second sub-guides, and a second spacer between the second die block and the third die block, the second spacer defining a second slot through which a second slurry is to be discharged.

A device for coating an electrode tab insulator includes: a top die having an inlet configured to receive an insulator; a bottom die on a lower side of the top die and coupled to the top die; and a shim member having a thickness (t) between the top die and the bottom die and including an outlet connected to the inlet and establishing a passage in which the insulator flows in a width direction of the outlet.

The present invention relates to a method for producing a thick electrode film having a layer thickness of 100 μm or more and 600 μm or less for a secondary alkali ion energy storage device, the method comprising the steps of: a) preparing a dispersion comprising at least one solvent and solids, the dispersion having a total solids content of 40 wt. % or more and 80 wt. % or less, the solids comprising an active material, one or more conductive additives, and one or more binders, and mixing butanediol into the dispersion at a concentration of 2 wt. % or more and 10 wt. % or less, based on the total weight of the dispersion; b) coating the dispersion in a layer thickness of 200 μm or more and 1200 μm or less; and c) drying the coated dispersion to obtain an electrode film. The present invention also relates to the use of the method according to the present invention for producing an electrode film, and to an electrode film having a layer thickness of 100 μm or more and 600 μm or less, and having a specific composition.

A method for manufacturing patterned electrodes includes extruding a mixture including 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 patterning the active material layer using a patterned roller including a plurality of projections that form a plurality of features extending into the active material layer.

Disclosed is a facility for manufacturing electrodes. According to an embodiment of the present disclosure, the facility for manufacturing electrodes may a heating roll which includes a heating roll shaft extending in a longitudinal direction and a heating roll contact surface rotatably coupled to the heating roll shaft about the heating roll shaft; a slot die disposed to face the heating roll while being spaced apart therefrom, and configured to dispense a slurry; a roll heating unit configured to heat the heating roll contact surface; and an electrode drying unit which includes a drying housing and a heater positioned inside the drying housing.

Novel composites for use in battery anode electrodes are described. The novel composites include silicon-based nanostructures attached to a carbon-based substrate having a polymer disposed thereon, the polymer including monomeric units formed from styrene and allyl alcohol. The composites allow for the preparation of anode electrodes having low ratios of inactive materials to active materials, with improved processability according to both wet and dry anode coating techniques. Anode electrodes including the composites have improved uniformity and are more apt at accommodating volume changes during cycling.

To stabilize the battery quality.SOLUTION: A battery manufacturing method includes the steps of measuring a predetermined weight of each of a plurality of electrode materials A to C and placing them in a container 31, placing the plurality of electrode materials A to C placed in the container 31 into a supplying machine 40, supplying the plurality of electrode materials A to C from the supplying machine 40 to a twin-screw kneader 50, and kneading the plurality of electrode materials A to C in the twin-screw kneader 50.SELECTED DRAWING: Figure 2

An edge glue coating extrusion die, the present application relates to battery processing production technology field, especially relates to functional slurry coating and insulating slurry coating for lithium battery extrusion die. By main film coating mechanism, edge glue coating mechanism and feed adjusting mechanism, main film coating mechanism and edge glue coating mechanism are independently arranged, and are embedded with each other, the glue amount of main film coating mechanism is adjusted in real time dynamically through feed adjusting mechanism, and the edge glue coating mechanism can switch the edge glue coating type at any time, which can greatly improve the efficiency in production, and can meet higher production speed, higher product requirement. The present application has the following advantages: 1) two functional slurries and insulating slurries can be coated simultaneously; 2) the different discharge opening ends arranged at equal intervals are alternately arranged, which can meet the material coating of all products with different coating widths; 3) the glue amount of main film coating is controllable.

Embodiments described herein relate generally to semi-solid slurries made with a mechanically compacted powder, and more particularly methods for preparing semi-solid slurries with a higher solid ratio (e.g., greater than 50% by volume of the slurry) which enables more stable production of batteries with high energy density. Described herein is a method for fabricating a semi-solid electrode and an electrode material. The method involves blending an active material with a conductive material to form an intermediate material, which is then compacted to form a compacted material. This compacted material is subsequently mixed with an electrolyte to form a semi-solid slurry. In some embodiments, the compacted material includes a plurality of agglomerates formed from the electrochemically active material. The method further includes applying the semi-solid slurry onto a current collector material to form a semi-solid electrode.

Provided herein are solid-state cathode compositions and processes for making the solid-state cathode compositions.

A method of manufacturing a battery includes providing a slurry including carbon nanotubes, a binder, and a solvent. The ultrasonic homogenizer is then operated to form a suspension containing the carbon nanotubes and the binder within the solvent. A layer of suspension is then applied to the current collector of the cell. Finally, an electrode coating of the battery is applied to the layer of suspension while applying the layer of suspension to the current collector.

The application discloses a secondary battery high-viscosity slurry coating method and device. The coating method is as follows: after the coating substrate sequentially passes through a slurry gap in a vacuum environment and a discharge gap for controlling the thickness of the coating slurry, the coating substrate is coated, and a uniform pole piece is obtained. The discharge gap is arranged on the basis of the slurry cavity. The coating device comprises a coating back roller, a coating member is arranged on the coating back roller, the coating member and the outer periphery of the coating back roller form a gap for coating the coating substrate, the coating member comprises a vacuum cavity and a slurry cavity which are communicated with the slurry gap for first coating the coating substrate, and a coating substrate leading-in mechanism is arranged at the end of the vacuum cavity away from the slurry cavity; a slurry inlet is arranged on the slurry cavity, and a casing at the end of the slurry cavity away from the vacuum cavity and the coating back roller form a discharge gap for re-coating. The device has the advantages of simple structure, convenient operation and the ability to effectively and uniformly coat high-viscosity slurry.

Provided are an electrode, a lithium battery including the same, and an electrode manufacturing method, the electrode including: an electrode active material layer including an electrode active material and a binder; and an electrode current collector on one surface or between two surfaces of the electrode active material layer, wherein the electrode active material layer includes: a first electrode active material layer including a first electrode active material and a first binder and contacting the electrode current collector; and a second electrode active material layer arranged on the first electrode active material layer and including a second electrode active material layer and a second binder.