Abstract: A battery electrode manufacturing device (1000) comprises: a conveying part (1200) that conveys a strip-shaped base film; an electrode composition supply part (1300) that supplies an electrode composition, which is wet powder including an active material and an electrolyte solution, to a predetermined supply position along the conveying direction of the base film; and a width guide part (1600) that controls the width of the electrode composition supplied onto the base film at the supply position.

Abstract: A method of manufacturing a battery electrode includes a powder supply step, a vibration step, a sorting step, a moving step, and a deposition step, in the powder supply step, a powder 60 composed of granulated particles is supplied, in the vibration step, vibration is applied to the powder, in the sorting step, the powder is caused to pass through at least one opening H1, H2 to adjust a particle diameter of the granulated particles to a particle diameter that allows passing through the opening, in the moving step, the powder that has passed through the opening is moved from an outlet position P1 of the opening to a supply position P2 where the powder is supplied to the surface of a current collector 31, and in the deposition step, the powder is deposited on the surface of the current collector.

Abstract: A manufacturing method is provided for manufacturing an electrode for a lithium-ion battery having a current collector and an electrode active material layer. In the method, an electrolytic solution is added to particles created by pulverizing a mixture containing electrode active material particles and a pressure sensitive adhesive resin to obtain an electrode active material composition. The electrode active material composition is molded into sheet form on a current collector using a roll press. The electrode active material composition has a weight of the electrolytic solution based on a total weight of the electrode active material composition that is 0.1-50 wt %.

Abstract: A battery module includes a cell having a cathode resin current collector, a cathode active material layer, a separator, an anode active material layer, and an anode resin current collector. The cell includes a frame sealing the cathode active material layer, the separator, and the anode active material layer. The cathode resin current collector and the anode resin current collector are respectively on first and second surfaces of the cell. An assembled battery in which a number of adjacent pairs of the cells are stacked in series such that the first surface and the second surface of the adjacent pair of the cells are adjacent to each other, or an assembled battery in which a number of cells, each of which has a cathode layer and an anode layer respectively provided on different surfaces of the resin current collector, are stacked via an electrolyte layer.

Abstract: A battery electrode manufacturing device includes: a powder supply device that supplies an electrode composition as a wet powder containing an electrode active material and an electrolytic solution to a strip-shaped base film; a conveyance mechanism that conveys the base film on which the electrode composition supplied from the powder supply device is placed; a preliminary press device, that includes a pair of preliminary rollers, and that compresses the electrode composition supplied from the powder supply device to the base film; and a press device having a pair of rollers that compress the electrode composition after compression by the preliminary press device. The preliminary press device includes a plurality of the pair of preliminary rollers that compress the electrode composition in stages, and the gap between the pair of preliminary rollers is set to be larger than the gap between the pair of rollers.

Abstract: An examination method includes bringing conductor probes into contact with surfaces of an examination target to measure voltage or electric resistance at points on the surfaces of the examination target, and determining whether or not the voltage or the electric resistance is out of an allowable range at any of the points. The examination target is a resin current collector, an electrode sheet having an active material layer laminated on a resin current collector, a separator-attached electrode sheet in which a separator is combined with an electrode sheet, or a unit cell including one set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode resin current collector, which are laminated in order. With the examination method, a defect such as a short circuit can be easily found and production yield can be improved.

Abstract: A battery electrode manufacturing device (100) comprises: a chamber (110) whose inside (IN) is decompressed below atmospheric pressure, wherein a base film (31A) is conveyed to the inside (IN) of the chamber (110) via a load opening (112); and a clean room section (150) that provides a space, wherein the clean room section (150) is provided in the load opening (112) side outside (OU) of the chamber (110), wherein the internal (INa) of the space is pressurized above atmospheric pressure, wherein the base film (31A) is conveyed toward the load opening (112) in the space, and wherein the clean room section (150) supplies clean pressurized air (a1) toward the load opening (112).

Abstract: A method of manufacturing an electrode composition for lithium-ion batteries that can prevent other electrode materials from forming aggregates on the surface of the coating layer of coated electrode active material particles, and that has good fluidity, and that can suppress deterioration of battery performance, can be provided. The method of manufacturing an electrode composition for lithium-ion batteries, the method including: a first mixing step of obtaining a powder for electrodes by mixing coated electrode active material particles for lithium-ion batteries, in which at least a part of the surface of the electrode active material particles is coated with a polymer compound, with a first conductive filler having an aspect ratio of 10 or less; and a second mixing step of obtaining an electrode composition by mixing the powder for electrodes with a second conductive filler having an aspect ratio of 15 or more.

Abstract: Coated electrode active material particles for lithium-ion batteries, that can suppress side reactions between the electrolytic solution and the coated electrode active materials, and that can prevent the internal resistance value of lithium-ion batteries from increasing, can be provided. The coated cathode active material particles for lithium-ion batteries in which at least a part of the surface of the cathode active material particles is coated with a coating layer, wherein the coating layer contains a polymer compound, a conductive assistant, and ceramic particles, and wherein the BET specific surface area of the ceramic particles is 70 to 300 m2/g.

Abstract: The battery electrode manufacturing device comprises: a film supply unit that supplies a film to an active material, wherein the active material has been stacked on a strip-shaped base film, wherein the active material is conveyed along a conveying direction in a chamber whose interior is decompressed below atmospheric pressure; and a compression unit that compresses the active material, which has been supplied on the base film, via the film.

Abstract: Coated electrode active material particles for lithium-ion batteries that can suppress side reactions between the electrolytic solution and the coated electrode active material particles, and that can prevent the internal resistance value of the lithium-ion battery from increasing even when they are used in a high temperature environment, can be provided. Coated electrode active material particles for lithium-ion batteries in which at least a part of the surface of the electrode active material particles is coated with a coating layer, wherein the coating layer contains particles made of polymer having lithium-ion conductivity, a coating resin, and a conductive assistant.

Abstract: A predoping method for a negative electrode active material to dope the negative electrode active material with lithium ions using an electrolyte solution that includes lithium ions. The electrolyte solution includes at least one type of additive having a reduction potential higher than a reduction potential of a solvent contained in the electrolyte solution.

Abstract: Provided is a battery pack in which close contact between resin current collectors of vertically adjacent unit cells can be maintained. A battery pack includes: two or more unit cells including a stacked unit consisting of a set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode resin current collector stacked sequentially, a stacked body of the above-described two or more unit cells being enclosed in an exterior body; and an integrated insulator covering across boundaries between the above-described unit cells on at least one of the side surfaces of the above-described stacked body.

Abstract: A battery pack having two or more cells provided with a lamination unit composed of a single set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer and a negative electrode resin current collector sequentially laminated together, the two or more cells being sealed in an exterior body, in which filler materials are provided in gaps between the cells and/or gaps between the cell and the exterior body.

Abstract: The present invention aims to provide a method for producing a pinhole-free thin resin current collector for negative electrodes. The method for producing a sheet-shaped resin current collector for negative electrodes of the present invention includes stacking three or more layers of melts of conductive resin compositions each containing a polyolefin and a conductive filler to obtain a multilayered body, wherein the polyolefin contained in each of the conductive resin compositions that form the respective layers of the multilayered body has a melt mass flow rate of 15 to 70 g/10 min as measured at a temperature of 230° C. and a load of 2.16 kg in accordance with JIS K7210-1:2014.

Abstract: A lithium ion battery including a cell formed by sequentially stacking a positive current collector, a positive active material layer, a separator, a negative active material layer, and a negative current collector, the lithium ion battery being characterized by including a frame member disposed between the positive current collector and the negative current collector to seal the positive active material layer, the separator, and the negative active material layer, the frame member having, disposed therein, an electronic component for detecting an internal condition of the cell.

Abstract: A battery electrode manufacturing device, which can suppress air from being contained in the active material and improve uniformity of an active material layer formed on a current collector, is provided. The battery electrode manufacturing device comprises: a first chamber whose interior is decompressed below atmospheric pressure; an active material supply unit that supplies a powdery active material onto a current collector, which is arranged in the first chamber; and a compressor that compresses the active material supplied on the current collector, wherein the active material supply unit and the compressor are arranged in the first chamber.

Abstract: A lithium-ion battery manufacturing device and a lithium-ion battery manufacturing method can suppress variation in thickness and shape distortion of a lithium-ion battery. The lithium-ion battery includes a cathode current collector, a cathode active material layer, a separator, an anode active material layer, and an anode current collector that are stacked. The lithium-ion battery has a circular frame member that fixes an outer edge of the separator, which is placed between the cathode current collector and the anode current collector, and that seals the cathode active material layer, the separator, and the anode active material layer. The lithium-ion battery manufacturing device includes: a holder that sandwiches the lithium-ion battery from both sides of the stacking direction; and a sealing device that has a frame-shaped heater, which heat-seals an outer edge of the lithium-ion battery by heating the frame member placed at the outer edge.

Abstract: An examination method of the present invention is characterized by including a step of bringing conductor probes into contact with surfaces of an examination target to measure voltage or electric resistance at a plurality of points on the surfaces of the examination target, the examination target being a resin current collector, an electrode sheet having an active material layer laminated on the resin current collector, a separator-attached electrode sheet in which a separator is combined with the electrode sheet, or a unit cell including one set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode resin current collector, which are laminated in order, and a step of determining whether or not a point at which the voltage or the electric resistance is out of an allowable range is present in the examination target.

Abstract: This invention has an objective to increase the collected amounts of lithium contained in a lithium-ion battery. A recycling method for a lithium-ion battery comprising: a first discharging step, which increases an amount of lithium included in a cathode active material by discharging the lithium-ion battery via a load with a first resistance value; a second discharging step, which further increases the amount of lithium included in the cathode active material by discharging the lithium-ion battery via a load with a second resistance value lower than the first resistance value; and a collecting step, which collects the cathode active material from the lithium-ion battery after the second discharging step.