6915results about "Electrode collector coating" patented technology

Embodiments described herein relate generally to systems and methods for continuously and / or semi-continuously manufacturing semi-solid electrodes and batteries incorporating semi-solid electrodes. In some embodiments, the process of manufacturing a semi-solid electrode includes continuously dispensing a semi-solid electrode slurry onto a current collector, separating the semi-solid electrode slurry into discrete portions, and cutting the current collector to form a finished electrode.

Apparatus, system and method for simultaneously drying a coating on a substrate using at least two different drying phenomena, for example, inductive heating and convective heating, or inductive heating and a combination of convective heating and infrared heating. A coating on a substrate is dried by generating heat in the substrate while simultaneously applying convective heat and / or radiant heat to the coating. Simultaneous drying refers to drying of the same region of a substrate at the same time, and in a particular embodiment, subjecting the same region of a substrate to inductive heating and convection at the same time. Preferably the substrate is at least partially conductive.

An electrode manufacturing apparatus according to one aspect of the present disclosure is configured to discharge a liquid to form a resin layer or an inorganic layer on an electrode substrate which is being conveyed in a predetermined direction. The electrode manufacturing apparatus includes a detector, a liquid discharger provided downstream of the detector in the predetermined direction and configured to discharge the liquid to form the resin layer or the inorganic layer, and a controller configured to control a discharge condition of the liquid discharger. Points where a property varies are present on the electrode substrate along a direction intersecting the predetermined direction. The detector outputs pieces of detection information obtained by detecting one of the points in time series, and the controller controls the discharge condition of the liquid discharger based on combined detection information obtained by combining the pieces of detection information.

The invention provides a pole piece and a manufacturing method thereof, a rolling system and a secondary battery, and the manufacturing method of the pole piece comprises the following steps: coating slurry on a current collector and drying to obtain a dried pole piece; the difference between the thickness of the dried pole piece and the preset thickness after rolling is used as the total rolling reduction; the dried pole piece is subjected to continuous multi-stage rolling, adjacent two-stage rolling is carried out, the percentage of the rolling reduction of the previous-stage rolling in the total rolling reduction is larger than or equal to the percentage of the rolling reduction of the next-stage rolling in the total rolling reduction, and the sum of the rolling reduction of all stages of rolling is equal to the total rolling reduction; in the multi-stage rolling, the rolling reduction of each stage of rolling is gradually reduced on the whole; and the multi-stage rolling is cold pressing. According to the manufacturing method of the pole piece, the multi-stage rolling mode is adopted, the rolling reduction decreasing and roller gap adjusting mode is adopted, the diameter, roughness and hardness of the roller body are combined to adapt to different rolling reduction, and finally the consistency of stress release and the pole piece is achieved.

A method for producing a multi-layer coating on a substrate for an anode or cathode includes preparing a first mixture including a first solvent and a first active material, preparing a second mixture including a second solvent and a second active material, combining the first mixture and the second mixture to form a slurry, and coating the substrate with the slurry. The first solvent and the second solvent are immiscible.

A method for manufacturing a dry electrode for an energy storage device are disclosed. The system includes a first dry electrode material delivery system configured to deliver a dry electrode material, a first calendering roll, a second calendering roll, and a controller. The second calendering roll is configured to form a first nip between the first calendering roll and the second calendering roll. The first nip is configured to receive the dry electrode material from the first dry electrode material delivery system, and form a dry electrode film from the dry electrode material. The controller is configured to control a rotational velocity of the second calendering roll to be greater than a rotational velocity of the first calendering roll.

The invention relates to a coating system (1) for dry coating a carrier film (2) for producing an electrode (3) for a storage cell of an electrical energy storage device, with at least one first roller calender (5) for providing the carrier film (2) on at least one side (9) of the carrier film (2) with a first coating (6), wherein at least one second roller calender (13) is provided for providing the carrier film (2) on the first coating (6) with a second coating (14).

The invention discloses a composite copper foil current collector and a preparation method thereof, a negative electrode, a lithium ion battery and electric equipment, and belongs to the technical field of batteries. The composite copper foil current collector comprises a polymer composite layer which comprises a polymer layer and a conductive material layer, the polymer layer has two opposite surfaces, and the conductive material layer is attached to at least one surface of the polymer layer; the polymer composite layer is provided with a first surface and a second surface which are opposite; and the copper layer is attached to the first surface and the second surface of the polymer composite layer. The conductive material is introduced to the surface of the polymer base material and then copper plating is performed, so that the binding force is stronger compared with the binding force between the polymer and copper; meanwhile, the conductive material is compounded on the polymer base material and replaces part of the polymer insulating material to form a coherent conductive network, so that the composite copper foil current collector has higher conductivity; volume expansion hardly occurs in the charging and discharging process, active substances are prevented from falling off from the current collector, and the cycling stability of the battery is improved.

The present invention relates to a method of manufacturing an electrode of an all-in-one battery comprising the steps of mixing an electrode active material, a solid electrolyte and a first binder with a first solvent to prepare a primary slurry; drying the primary slurry to prepare a mixture powder; mixing the mixture powder, a conductive agent, and a second binder with a second solvent to prepare a secondary slurry; and coating the secondary slurry on a current collector.

The invention discloses sodium ion battery positive electrode slurry, a positive electrode plate and a sodium ion battery. The sodium ion battery positive electrode slurry is prepared from the following materials in percentage by mass: 93-97% of a positive electrode main material; 1%-3% of a binder; 1%-5% of a conductive agent; 0.1%-0.5% of an alkaline regulator; and the positive electrode main material is a mixture of a layered oxide sodium battery positive electrode and a polyanion sodium battery positive electrode. The positive pole piece prepared from the layered oxide and polyanion mixed positive pole material is high in compaction, and the obtained sodium ion battery has excellent first effect, energy density, cycle performance and safety performance. The method is simple to operate, slurry mixing is performed in a low-humidity environment in a manner of neutralizing residual alkali on the surface of the material by adopting maleic anhydride, and the obtained positive electrode slurry is good in viscosity and stability, excellent in dispersion effect and excellent in gel resistance.

The invention discloses a bipolar current collector and a preparation method thereof, a bipolar electrode and a battery, the bipolar current collector comprises a base film layer, an aluminum layer is arranged on the surface of one side of the base film layer, and a copper layer is arranged on the surface of the other side of the base film layer; the base film layer comprises a middle polymeric film layer and ceramic layers on the surfaces of the two sides of the polymeric film layer; miniature channels for lithium ions to pass through are distributed on the bipolar current collector along the thickness direction, and the miniature channels penetrate through the aluminum layer, the base film layer and the copper layer. A diaphragm in a traditional bipolar electrode is omitted, so that the volume energy density in the battery is remarkably improved, lithium ions in the battery can have diffusion channels in multiple directions, the internal resistance of the battery is reduced, and the rate capability is improved. According to the invention, a diaphragm lamination process is omitted, the production efficiency can be improved, and meanwhile, the risk of short circuit at the edges of the positive and negative active material layers caused by alignment errors of the lamination process is avoided.

The invention relates to the technical field of batteries, and particularly discloses a current collector, a method for preparing the current collector, a pole piece, a lithium ion battery and a power utilization device.The current collector comprises a base material and a conductive coating arranged on at least one side of the base material, and physical crosslinking points are evenly distributed in the conductive coating; the physical cross-linking points are non-covalent bond connecting points and comprise coordinate bonds between the binder and metal ions and / or hydrogen bonds between the binder and the polyhydroxy compound. The physical cross-linking points can effectively improve the adaptability of the conductive coating to the expansion and shrinkage stress of the active material layer in the long-term circulation process, the physical cross-linking points can be self-generated again after being damaged, the cross-linking structure improves the adhesion strength of the conductive coating to the current collector, meanwhile, the conductive coating has excellent fatigue resistance, and the service life of the conductive coating is prolonged. After long-term circulation, the high cohesiveness is still kept, and the phenomena of interface separation and active substance powder falling are not prone to occurring.

A positive electrode active material, a method of preparing the same, a positive electrode, and a rechargeable lithium battery including the positive electrode are provided. The positive electrode active material includes core particles and a coating layer on the surface of the core particles. The core particles include a layered lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than, or equal to, about 60 mol % based on 100 mol % of a total metal amount excluding lithium. The coating layer includes Al and P.

A negative electrode including a negative electrode current collector; a negative electrode active material layer that is disposed on at least one surface of the negative electrode current collector and includes a negative electrode active material; and a coating layer including a negative-type (N-type) organic active material, wherein the negative electrode active material layer includes an inclined part provided in at least one side thereof by partitioning the negative electrode active material layer, and a flat part provided excluding the inclined part, the inclined part is inclined towards the surface of the negative electrode current collector, and the coating layer is disposed on at least a portion of the inclined part.

According to exemplary embodiments, provided in a method for generating a roll map. The method comprises the steps of: transmitting process information about an electrode sheet to a processor; updating a measurement condition of the processor on the basis of the process information; and collecting measurement data including measurement values on the basis of a measurement signal generated by measuring the electrode sheet, wherein the electrode sheet includes a plurality of coated lanes and a plurality of uncoated parts; and processing the measurement data on the basis of the measurement condition updated on the basis of the process information.

Examples include a device for coating a carrier substrate with a powdered material. The device includes an application unit having a first roller and a second roller which, at a nip thereof, form a first gap through which a powder mixture can be conveyed to form a dry film. A counter-pressure roller, together with the second roller or another roller arranged between the counter-pressure roller and the second roller, forms a second gap through which the carrier substrate to be coated can be guided for having the dry film applied to the carrier substrate. The first gap between the first and second rollers can be adjusted based on a position-based positioning drive by being set to a constant and / or defined gap width, and the second gap can be adjusted based on a force-based positioning drive, and can be set to a constant and / or defined contact force or linear force.

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.

Provided is an electrode for lithium-ion secondary battery, the electrode comprising an active material layer comprising a particulate active material, the active material comprising an organic sulfur compound and an iron compound, wherein As, AF, and M satisfy the following inequality (1) As×AF×M > 1600, where As represents a sulfur element content, in % by mass, in the active material, AF represents an iron element content, in % by mass, in the active material, and M represents a median diameter, in µm, of the active material. It is an object of the present invention to improve an overall performance of charge and discharge capacity and a capacity retention rate of a lithium-ion secondary battery.

The present application provides a method and apparatus for determining the boundary of a thinned coating region of an electrode sheet, an electronic device, and a medium. The method comprises the steps: obtaining an initial contour curve from a contour curve set of an initial thinned coating region of a target electrode sheet; on the basis of the material region surface density of a material region in the target electrode sheet and the initial contour curve, determining a corresponding initial positive and negative electrode capacity ratio; and if the initial positive and negative electrode capacity ratio meets a preset positive and negative electrode capacity ratio, determining that the initial contour curve is the boundary of the initial thinned coating region.

A method for manufacturing an anode electrode includes rolling a first aluminum foil layer; annealing the first aluminum foil layer to create a first annealed aluminum foil layer; mechanically bonding a first lithium metal foil layer between an anode current collector and the first annealed aluminum foil layer; and aging the anode electrode to prelithiate the first annealed aluminum foil layer.

Proposed is an apparatus and method for manufacturing a dry electrode sheet. The apparatus includes a material feeder supplying an electrode material, a pair of sheet forming rollers facing each other and forming an electrode sheet by pressurizing the electrode material supplied from the material feeder, a first force sensor connected to each of the sheet forming rollers and measuring a force applied to each of the sheet forming rollers, a thickness sensor measuring a thickness of the electrode sheet, a gap adjuster connected to each of the sheet forming rollers and adjusting the gap between the sheet forming rollers, and a controller controlling the gap adjuster to adjust the gap between the sheet forming rollers on the basis of a force value measured by the first force sensor so that the thickness of the electrode sheet received from the thickness sensor matches a target value.

The invention relates to a base membrane for a composite current collector based on SiO2 nano composite modification and a preparation method of the base membrane. Synergistic modified nano SiO2 is compounded with aluminum hypophosphite, montmorillonite and the like to form modified auxiliary particles, the modified auxiliary particles and PET master batches are subjected to blending extrusion, and meanwhile, the surface of the base membrane is coated with a modified coating containing nano SiO2, so that the composite current collector is obtained. The mechanical property, the thermal stability and the flame retardance of the base film are obviously improved.

Disclosed herein is a current collector, a secondary battery, an electrical device, and a method for preparing the current collector. The current collector includes a substrate. The substrate includes the porous material. The affinity material is disposed in pores of the porous material. The affinity material is configured to promote the deposition of metal ions in an electrolyte solution. The affinity material includes at least one of a carbon-based material, a non-metal oxide, a carbide, a fluoride, a nitride, a sulfide, a phosphide, and an organic material. The above manner is able to effectively reduce the nucleation overpotential of the metal ions on the porous material of the current collector, promote the uniform diffusion and deposition of the metal ions within the pores of the porous material of the current collector, inhibit the generation of a dendrite, and improve the cyclic performance and safety of the battery.

A secondary battery manufacturing device is provided that includes a case portion provided with a nozzle configured to face a base material being moved by a coating roll. A cavity portion is positioned inside the case portion, with the cavity portion forming a conduit for transferring a coating solution to the nozzle. A vent portion is provided that has a first side surrounding an inlet to the cavity portion and a second side extends to the outside of the case portion to form a path for discharging gas. A filtering portion is positioned between the cavity portion and the vent portion, with the filtering portion being configured to direct gas contained in the coating solution in a direction toward the vent portion and prevent liquid of the coating solution from being directed to the vent portion.

The invention relates to the technical field of lithium batteries, in particular to a multi-layer negative electrode and a preparation method and application thereof.The base foil of the multi-layer negative electrode is provided with a bottom layer, the bottom layer is provided with a surface layer, and the surface layer comprises surface layer glue, surface layer conductive carbon and a surface layer active substance; the peel strength of the bottom layer is recorded as Rb, the peel strength of the surface layer is recorded as Rs, the rebound correction coefficient of the surface layer is recorded as Ee, the mass percent of surface layer glue in the surface layer is recorded as Cc, Rb is larger than or equal to 60N / m and smaller than or equal to 320N / m, Rs is larger than or equal to 5.6 N / m and smaller than or equal to 42N / m, Ee is larger than or equal to 0.233 and smaller than or equal to 1.45, Cc is larger than or equal to 1.2% and smaller than or equal to 7.5%, and [In (Rb / Rs-0. 4)] * (Ee / Cc) 1 / 2 is larger than or equal to 0.12 and smaller than or equal to 26.67. According to the invention, the negative electrode is designed into a multi-layer structure and is supplemented with the surface glue with excellent performance, so that the anti-expansion performance of the multi-layer negative electrode is improved under the synergistic effect, and the rapid charging performance and the long cycle performance of the lithium ion battery can be improved.

A solid-state battery, preferably a pouch cell, includes a cathode including cathode active material comprising Li ions, graphene, and optionally a binder; an electrolyte; and an anode, preferably a lithium anode, wherein said electrolyte is positioned in between said cathode and said anode.

The invention provides a pole piece, a battery and an electronic device, the pole piece comprises: a current collector, the current collector comprises a coated area and an uncoated area, the coated area comprises an active material layer, a first insulation part and a second insulation part which are arranged along a preset direction on at least one surface of the current collector in the thickness direction and are sequentially and adjacently arranged; in the thickness direction of the current collector, the thickness of the first insulating part is greater than that of the second insulating part, and the first insulating part comprises a first insulating layer and a second insulating layer coated on the first insulating layer; in the preset direction, the width of the uncoated area is W1mm, the width of the first insulating part is W2mm, and W1 / W2 is larger than or equal to 1.5 and smaller than or equal to 10. According to the pole piece, the battery and the electronic device provided by the invention, on the premise of reducing wrinkles and folding of the uncoated area, the uncoated area has enough width to be assembled with other structures in the 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 system for tracking a position of an electrode of a battery cell is disclosed which comprises: a controller configured to acquire coordinate information of the electrode and a cell identification (ID) of the unit electrode; a calculator configured to calculate coordinates of the cell ID, the coordinates of the cell ID corresponding to one or more positions of the unit electrode; a roll map generator configured to generate a roll map based on the coordinate information of the electrode obtained from the controller, the roll map including coordinates of the roll map based on a dimension in a length direction of the electrode; and a mapping part configured to compare the coordinates of the roll map with the coordinates of the cell ID to derive the one or more position of the unit electrode during the electrode manufacturing process from which the unit electrode originates.

The invention relates to a negative pole piece and a preparation method and application thereof.The negative pole piece comprises a current collector and a negative active layer arranged on at least one face of the current collector in the thickness direction, the negative active layer comprises a first active layer, a second active layer and a third active layer, the first active layer is attached to the surface of the current collector, and the second active layer is attached to the surface of the current collector; the second active layer is arranged on the surface, far away from the current collector, of the first active layer, and the third active layer is arranged on the surface, far away from the first active layer, of the second active layer; the first active layer comprises carbon-coated secondary particle graphite, the second active layer comprises heteroatom-doped hard carbon, and the third active layer comprises porous carbon nanofibers. According to the lithium ion battery, the multiple active layers containing different active materials are arranged on the surface of the current collector, and meanwhile, the thickness of each active layer is regulated and the preparation process is optimized, so that the lithium ion battery containing the negative pole piece has high energy density, quick charge capacity and excellent cycle life.