Abstract: An electrode mixture including an electrode active material, a conductive fibrous carbon material, and inorganic nanoparticles applied to a surface of the electrode active material. The conductive fibrous carbon material contains magnetic metal. A ratio of coverage of the inorganic nanoparticles covering the surface of the electrode active material to content of the magnetic metal contained in the conductive fibrous carbon material is 38.5 or less.

Abstract: An electrode body includes a stack of a negative electrode plate, a positive electrode plate, and a separator in which the separator is arranged between the negative electrode plate and the positive electrode plate. The positive electrode plate has a positive electrode density of 3.0 g/cm3 or less. The negative electrode plate has a negative electrode density of 1.3 g/cm3 or less. A ratio of a specific surface area of the positive electrode plate to a specific surface area of the negative electrode plate is 0.7 or greater.

Abstract: A secondary battery manufacturing method according to an example embodiment of the present disclosure includes an electromagnetic welding step of joining together a first metallic component and a second metallic component included in the secondary battery by electromagnetic welding, and a laser welding step of applying laser light to weld an unjoined part of the first metallic component and the second metallic component, the unjoined part being not joined by the electromagnetic welding step.

Abstract: An electrode body for a non-aqueous rechargeable battery includes a positive electrode substrate and a positive electrode mixture layer. A ratio of a specific surface area of the positive electrode plate to a density of the positive electrode mixture layer is 1.0 to 2.0, inclusive. A ratio of a spring constant of the electrode body to the specific surface area of the positive electrode plate is 30 to 80, inclusive.

Abstract: A non-aqueous rechargeable battery includes an electrode body formed by rolling a stack of positive and negative electrode plates with a separator that holds a non-aqueous electrolyte solution disposed in between. The electrode body includes a curved portion in which layers of the electrode body are curved. The positive electrode plate includes a foil of a positive electrode substrate and a positive electrode mixture layer applied to the positive electrode substrate. The negative electrode plate includes a foil of a negative electrode substrate and a negative electrode mixture layer applied to the negative electrode substrate. The negative electrode mixture layer includes a negative electrode active material that intercalates a charge carrier during charging. A coefficient of static friction between the negative electrode mixture layer and the separator is 0.60 or greater. A coefficient of static friction between the positive electrode mixture layer and the separator is 0.50 or less.

Abstract: A positive electrode plate for a non-aqueous electrolyte rechargeable battery includes a positive electrode mixture layer that is formed by a positive electrode mixture including a positive electrode active material and a conductive material. When RS=(RC×BC)/(RA×BA) is satisfied, where RC (mass %) represents a percentage of the conductive material, BC (m2/g) represents a specific surface area of the conductive material, RA (mass %) represents a percentage of the positive electrode active material, BA (m2/g) represents a specific surface area of the positive electrode active material, and RS represents a total surface area ratio, an aspect ratio AR of the conductive material is thirty or greater, the total surface area ratio RS is in a range of 0.20 to 1.93, and a porosity P (%) of the positive electrode mixture layer is in a range of 40% to 55%.

Abstract: An electrode body includes a substrate serving as a collector, a mixture layer formed on the substrate and containing an electrode active material, and an insulation layer formed on the substrate adjacent to the mixture layer. The insulation layer contains an insulative material. In an interfacial region of the mixture layer and the insulation layer, the mixture layer extends over and overlaps the insulation layer that covers a surface of the substrate. Further, an interfacial surface of the insulation surface interfacing the mixture layer includes undulations having an undulation width that is greater than a particle size of the electrode active material.

Abstract: A non-aqueous electrolyte rechargeable battery includes a positive electrode plate, a negative electrode plate, a separator, and a non-aqueous electrolyte solution. The positive electrode plate includes a current collector, a mixture layer formed on part of at least one surface of the current collector, and an insulating protective layer formed on the at least one surface of the current collector. The insulating protective layer is adjacent to the mixture layer. The insulating protective layer includes an interposed portion located between the mixture layer and the current collector. The insulating protective layer further includes a cavity extending between the interposed portion and the current collector. The cavity is dimensioned to be 3 ?m or greater in a thickness direction of the positive electrode plate and in a range of 5 to 100 ?m, inclusive, in a widthwise direction of the positive electrode plate.

Abstract: A battery includes: an outer casing accommodating a power generating element; and a terminal member connected thereto and having a terminal surface exposed outside the outer casing. The battery further includes a conductive closing member formed with a through hole for the terminal member, and an insulating sealing resin member closing a gap between the closing member and the terminal member over the entire perimeter of the through hole. The outer surface of the sealing resin member outside the closing member is defined by an outward-facing portion connected to the terminal member and a sloped portion continuous with and more steeply sloped than the outward-facing portion to have a height from an outer surface of the closing member, smaller toward a farther side from the terminal member. Those outward-facing portion and sloped portion are provided outside an outer edge of the terminal surface over the entire perimeter thereof.

Abstract: A method for manufacturing a rechargeable battery includes forming a mixture layer and an insulating layer on an electrode substrate having an edge extending in a specified direction so that an exposed portion where the electrode substrate is exposed extends between the edge and the insulating layer; pressing the mixture layer; and stretching an extension portion, located between the edge and the mixture layer, and the insulating layer in the specified direction. The stretching includes applying a stress greater than or equal to yield stress of the electrode substrate or greater than or equal to 0.2% proof stress of the electrode substrate and less than tensile strength of the electrode substrate to the extension portion, and applying a stress greater than or equal to yield stress of the insulating layer or greater than or equal to 0.2% proof stress of the insulating layer to the insulating layer.

Abstract: A rechargeable battery state determination method determines whether a rechargeable battery is in a micro-short-circuit-prone state, which is a state that is highly likely to form a micro-short circuit.

Abstract: In an insulating protective layer formed on each of two opposite surfaces of a positive electrode connection portion, a yield stress X (N) of a positive electrode plate is set such that “X?0.122 N” is satisfied. “MIN?0.0372 N” is satisfied, where MIN (N) represents a flexural strength of the positive electrode plate including only an inner insulating protective layer formed on a surface of the positive electrode connection portion that is located toward a positive electrode current collector in a stacking direction of an electrode body.

Abstract: A state determination device for a lithium-ion rechargeable battery includes a storage device and an execution device. The storage device stores deposition determination mapping data for defining a deposition determination mapping that uses a difference variable as an input variable and outputs information on whether lithium is deposited on a negative electrode of the lithium-ion rechargeable battery. The difference variable indicate information on a difference between a surface concentration of the negative electrode active material and an average concentration of the negative electrode active material in the lithium-ion rechargeable battery. The execution device is configured to execute a determination acquisition process for acquiring a value of the input variable of the deposition determination mapping, and a determination process for determining deposition of lithium by inputting the value of the input variable of the deposition determination mapping to the deposition determination mapping.

Abstract: A method for manufacturing a lithium-ion rechargeable battery includes manufacturing a positive electrode plate that includes a positive electrode mixture layer containing a positive electrode active material, lithium hydroxide, and lithium acetate; manufacturing a negative electrode plate that includes a negative electrode mixture layer containing a negative electrode active material and a sodium salt; and injecting a non-aqueous electrolyte solution including LiBOB into a case that accommodates the positive and negative plates. When “A” represents a mole number of the lithium hydroxide added in the manufacturing the positive electrode plate, “B” represents a mole number of the lithium acetate formed in the manufacturing the positive electrode plate, and “C” represents a mole number of the sodium salt added in the manufacturing the negative electrode plate, 0.04?B/A?0.06 and 1.9?B/C are satisfied. Lithium acetate has a higher solubility in the non-aqueous electrolyte solution than sodium acetate.

Abstract: In a manufacturing process of a battery or a circuit board, or a printing process, there is a case where a long sheet material is conveyed from an unwinding unit to a winding unit. One object of the present disclosure is to provide a technique capable of preventing the long sheet material from being rubbed by a roller when the material is conveyed. The present disclosure relates to a conveyor adapted for a battery manufacturing process. The conveyor comprises a roller configured to convey a long sheet material, a shaft through the roller; a bearing installed between the roller and the shaft, and a driver configured to rotate the shaft in the same direction as a rotating direction of the roller conveying the long sheet material.

Abstract: An electrode mixture including an electrode active material, a conductive fibrous carbon material, and inorganic nanoparticles applied to a surface of the electrode active material. The conductive fibrous carbon material contains magnetic metal. A ratio of coverage of the inorganic nanoparticles covering the surface of the electrode active material to content of the magnetic metal contained in the conductive fibrous carbon material is 38.5 or less.

Abstract: An electrode body includes a stack of a negative electrode plate, a positive electrode plate, and a separator in which the separator is arranged between the negative electrode plate and the positive electrode plate. The positive electrode plate has a positive electrode density of 3.0 g/cm3 or less. The negative electrode plate has a negative electrode density of 1.3 g/cm3 or less. A ratio of a specific surface area of the positive electrode plate to a specific surface area of the negative electrode plate is 0.7 or greater.

Abstract: A method for manufacturing a negative electrode plate of a rechargeable battery is provided. The method includes kneading a negative electrode active material and a negative electrode additive to form a negative electrode mixture paste; applying the negative electrode mixture paste to a negative electrode current collector; and drying the negative electrode mixture paste. The blackness of a material prepared by kneading the negative electrode active material and the negative electrode additive is set in a range of 4 to 16. The viscosity of a negative electrode thickener contained in the negative electrode additive is set in a range of 13000 mPa·s to 21000 mPa·s when a shear rate is 0.01 s?1.

Abstract: A lithium-ion rechargeable battery includes a negative electrode plate including a negative electrode substrate and a negative electrode mixture layer applied to the substrate, a positive electrode plate including a positive electrode substrate and a positive electrode mixture layer applied to the substrate, a separator arranged between the negative electrode plate and the positive electrode plate, and a non-aqueous electrolyte. The negative electrode substrate includes a negative electrode connection portion that projects from the negative electrode mixture layer in a first width direction. The positive electrode substrate includes a positive electrode connection portion that projects from the positive electrode mixture layer in a second width direction. The separator has a gas permeability that is greater at a portion facing an end of the positive electrode mixture layer in the second width direction than a portion facing an end of the positive electrode mixture layer in the first width direction.

Abstract: A lithium-ion rechargeable battery includes a negative electrode plate including a negative electrode substrate and a negative electrode mixture layer applied to the substrate, a positive electrode plate including a positive electrode substrate and a positive electrode mixture layer applied to the substrate, a separator arranged between the negative electrode plate and the positive electrode plate, and a non-aqueous electrolyte. The negative electrode substrate includes a negative electrode connection portion that projects from the negative electrode mixture layer in a first width direction. The positive electrode substrate includes a positive electrode connection portion that projects from the positive electrode mixture layer in a second width direction. The negative electrode plate has a thickness that increases in the first width direction. The positive electrode plate has a thickness that increases in the second width direction. The separator has a porosity that increases in the second width direction.