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 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 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 battery pack includes battery cells and a spacer arranged between two adjacent battery cells. Each battery cell includes an electrode body and a case. The electrode body includes an upper curved portion, a flat portion, and a lower curved portion. The spacer presses one side wall of the case of one of the adjacent battery cells toward an inner side of the case at a part where the side wall opposes a region from the upper curved portion to the lower curved portion. The spacer forms passages for cooling air between the spacer and the side wall. A first cooling efficiency of the cooling air per unit area at a first opposing portion of the side wall that opposes the upper curved portion is less than a second cooling efficiency per unit area at a second opposing portion of the side wall that opposes the flat portion.

Abstract: An electrode mixture includes an electrode active material and a carbon nanotube as a conductive fibrous carbon material. The electrode mixture includes an inorganic nanoparticle disposed on a surface of the electrode active material.

Abstract: A method for manufacturing a positive plate of a rechargeable battery includes producing an insulation protective paste forming an insulation protective layer of the positive plate, the insulation protective paste including insulation particles, a binder, and a solvent and having a pH adjusted corresponding to a zeta potential at which the insulation particles do not aggregate, producing a positive composite material paste forming a positive composite material layer of the positive plate, the positive composite material paste including a positive active material, a conduction support, a binder, and a solvent, and a pH adjuster being added to the positive composite material paste to adjust a pH corresponding to a zeta potential at which the insulation particles aggregate, and simultaneously coating a positive current collector of the positive plate with the positive composite material paste and the insulation protective paste disposed adjacent to an end of the positive composite material paste.

Abstract: A battery stack includes cells that are arranged in a row and bound together. Each of the cells includes a case and an electrode body accommodated in the case. The cells include multiple types of position variation cells, in which positions of electrode bodies of the cells are different from each other when the cells are viewed in an arrangement direction of the cells.