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 non-aqueous rechargeable battery includes an electrode body in which a positive plate and a negative electrode plate are stacked in a stacking direction with a separator arranged in between. The positive electrode plate includes a positive electrode substrate, and a positive electrode mixture layer and an insulating layer arranged on each of two opposite surfaces of the positive electrode substrate. The positive electrode substrate includes a positive electrode uncoated portion. The electrode body includes a positive electrode current collector portion in which layers of the positive electrode uncoated portion are stacked in the stacking direction. A first insulating layer on a first surface of the positive electrode substrate, facing a center of the positive electrode current collector portion in the stacking direction, has a thickness that is greater than that of a second insulating layer on a second surface of the positive electrode substrate opposite to the first surface.

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 non-aqueous rechargeable battery includes an electrode body formed by rolling a stack of a positive electrode plate and a negative electrode plate with a separator arranged in between. At least one of the positive electrode plate and the negative electrode plate includes a substrate, a first mixture layer located on an outer side of the substrate, and a second mixture layer located on an inner side of the substrate. The second mixture layer includes an active material having a BET specific surface area that is greater than that of an active material included in the first mixture layer.

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.

Abstract: A coating device includes a backup roll configured to transport a workpiece; a coating die configured to discharge a coating liquid onto the workpiece; a drive section capable configured to drive the backup roll; and a heat dissipation section configured to dissipate heat generated in the drive section.

Abstract: A method for bonding a current collector to an electrode body is provided. The electrode body includes electrode plate end portions arranged over each other in a thickness direction. The method includes forming a covering by integrally covering the electrode plate end portions with resin at a bonding position of the current collector, and bonding a bonding portion of the current collector, by performing solid-phase bonding, to edges of the electrode plate end portions integrated by the formed covering.

Abstract: A non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a sodium concentration of greater than 532 ppm and less than 71100 ppm. The non-aqueous electrolyte rechargeable battery includes a LiBOB equivalent. The LiBOB equivalent is lithium bis(oxalato)borate in the non-aqueous electrolyte or a substance formed when the lithium bis(oxalato)borate reacts with another substance. The non-aqueous electrolyte has a hypothetical concentration of the LiBOB equivalent of 0.35 wt % or greater and 0.56 wt % or less when an amount of the LiBOB equivalent is converted into a weight of the lithium bis(oxalato)borate.

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 battery terminal has a two-piece configuration of different types of conductive materials. A first piece placed outside and a second piece placed inside with including a current collecting portion are fixed in two portions of a first fixing portion and a second fixing portion. The first fixing portion is positioned between the current collecting portion and the second fixing portion in a longitudinal direction in a shape of the terminal. Leaning of the current collecting portion with respect to a center in a short-side direction and leaning of the first fixing portion with respect to a center are opposite to each other.

Abstract: A battery includes a current collecting member connected to a power generating element housed in an outer casing with a lid, and a rivet placed outside the outer casing. The current collecting member includes a plate-shaped portion placed along the lid. The rivet includes a through part extending through the lid, and a contact part contacting a first surface of the plate-shaped portion. A part of a peripheral end portion of the contact part is joined to the first surface. An edge portion of a non-joined portion of the peripheral end portion, facing the first surface, includes a tapered surface generating a gap smaller at a position closer to the through part. The tapered surface has a maximum size of 0.1 mm or more in a direction from the peripheral end portion to the through part and 0.03 mm or more in a thickness direction of the peripheral end portion.

Abstract: An electrode body of a non-aqueous electrolyte rechargeable battery includes a positive electrode, a negative electrode, and a separator. The negative electrode includes a current collector and an active material layer. The active material layer includes active material particles. The active material particles have a volume distribution including a first peak corresponding to a first particle size and a second peak corresponding to a second particle size smaller than the first particle size. The first particle size is in a range of 7.0 ?m to 9.0 ?m. The second particle size is in a range of 0.8 ?m to 1.0 ?m. The separator has a surface roughness of 1.54 ?m or greater. A peak ratio of a volume of the active material particles of the second peak to a volume of the active material particles of the first peak is in a range of 0.42 to 0.71.

Abstract: In a battery, a terminal member includes: a columnar portion; a head portion, outside an outer casing, having a larger diameter than a through hole of a lid; and an umbrella-shaped portion, more inside than a current collecting member, having a larger diameter than a through hole of the current collecting member to closely contact an inside surface thereof. A gasket includes: a plate-shaped portion between the lid and the head portion; and a cylindrical portion between a wall surface of the through hole of the lid and the columnar portion. An insulator includes: a plate-shaped portion between the lid and the current collecting member; and a cylindrical portion between the wall surface of the through hole of the lid and the columnar portion. Leading ends of the cylindrical portions close contact each other between the wall surface of the through hole of the lid and the columnar portion.

Abstract: A power feeding system of the present disclosure includes a control unit. In a case where a magnitude of supply destination power is smaller than an upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power based on power output from the power source, and to charge the storage battery with power which is a difference obtained by subtracting the supply destination power from the upper limit value of the power supply capability of the power source. In a case where the magnitude of the supply destination power is more than or equal to the upper limit value of the power supply capability of the power source, the control unit controls the charge/discharge control circuit so as to meet the supply destination power by both the power source and the storage battery.

Abstract: A positive plate for a nonaqueous rechargeable battery includes a positive electrode substrate and a positive electrode mixture layer that contains at least a positive electrode active material. Particles of the positive electrode active material having a specific surface area of a range of 1.5 m2/g to 3.0 m2/g prior to manufacture of the positive plate for the nonaqueous rechargeable battery are used. A difference between a specific surface area of the positive plate for the nonaqueous rechargeable battery after manufacturing the positive plate for the nonaqueous rechargeable battery and the specific surface area of the particles of the positive electrode active material prior to manufacture of the positive plate for the nonaqueous rechargeable battery is in a range of 0.66 m2/g to 1.8 m2/g.

Abstract: A non-aqueous electrolyte rechargeable battery includes an electrode body, a negative electrode current collector, and a positive electrode current collector. The electrode body includes a stack of a negative electrode sheet, a positive electrode sheet, and a separator. The negative electrode sheet includes a negative electrode base, a negative electrode mixture layer, and a negative electrode connecting portion. The positive electrode sheet includes a positive electrode base, a positive electrode mixture layer, a positive electrode connecting portion, and an insulating protective layer. The insulating protective layer includes an outer insulating protective layer on a surface relatively far from the positive electrode current collector in a stacking direction of the electrode body and an inner insulating protective layer on a surface relatively close to the positive electrode current collector in the direction.

Abstract: A method for manufacturing a battery pack includes forming a positive electrode plate; forming a negative electrode plate; forming an electrode body; forming a battery cell; applying a binding load to battery cells; and initially charging the battery cells. When “A mg/cm2” represents a mass of a positive electrode active material on the positive electrode substrate, “C cm3/cm2” represents a volume of pores in the positive electrode substrate, “B mg/cm2” represents a mass of a negative electrode active material on the negative electrode substrate, “D cm3/cm2” represents a volume of pores in the negative electrode substrate, “E cm3/cm2” represents a volume of pores in the separator, and “F N/mm2” represents pressure applied to an opposing portion of a case of the electrode body facing a flat surface of the electrode body, a value of (A+B)/{(C+D+E)/F} is between 1300 and 3000, inclusive.

Abstract: A method for joining a current collector includes (1) providing an electrode body that includes electrode plate end portions overlapping each other in a thickness-wise direction of the electrode plate end portions, (2) providing a current collector including a folded portion, where the folded portion includes two opposing holding walls that hold the electrode plate end portions of the electrode body in between, and a top part that connects the two holding walls and includes an opening, and (3) brazing edges of the electrode plate end portions, exposed from the opening of the top part, to the two holding walls to join the current collector to the electrode body.