Abstract: A battery disclosed herein includes a container member housing an electrode body and a lead, a gasket, an external terminal, and a restraining member. The container member includes a terminal-connecting part having a thickness of 0.3 mm or less. The terminal-connecting part includes a through hole including a rising part. The gasket includes a hollow shaft inserted into the rising part. The external terminal includes a terminal shaft. The terminal shaft includes a diameter-reduction part. The restraining member restrains at least a part of the diameter-reduction part of the terminal shaft via the diameter-reduction part of the rising part and the shaft of the gasket. The inclination angle of the rising part is larger than the inclination angle of the terminal shaft.

Abstract: According to one embodiment, a battery includes a flat-shaped electrode group, a package member and a terminal section. The package member includes a stainless steel-made first package having a flange at an opening and a stainless steel-made second package. The electrode group is stored in a space formed by welding the flange of the first package to the second package. The terminal section includes a through-hole that is open to the first package, a ring-shaped rising portion that extends from a periphery of the through-hole toward an inside of the package member, a ring-shaped member that is arranged on an outer surface of the rising portion, an insulation gasket, and an external terminal. The external terminal is fixed to the first package by caulking.

Abstract: According to one embodiment, a battery is provided. The battery includes an electrode body, a lead, a container member, and a terminal. The container member includes a main part and a terminal-connecting part adjacent to the main part. The electrode body is housed in the main part of the container member. The lead is electrically connected to the electrode body. The lead is housed in the terminal-connecting part of the container member. The terminal is electrically connected to the lead. The terminal is provided on the terminal-connecting part. A thickness of the main part of the container member is larger than a thickness of the terminal-connecting part of the container member.

Abstract: A positive electrode and a negative electrode are stacked so as to face each other with a separator and a low spring constant film interposed therebetween. The positive electrode or the negative electrode has a first spring constant that is the lowest spring constant of the positive electrode, the negative electrode and the separator. The low spring constant film has a second spring constant. The second spring constant is lower than the first spring constant.

Abstract: A nonaqueous electrolyte secondary battery includes: a negative electrode current collector foil; and a negative electrode mixture layer that is arranged on the negative electrode current collector foil. The negative electrode mixture layer contains a plurality of granulated particles. Each of the granulated particles contains a negative electrode active material and a coating film. The coating film is formed on a surface of the negative electrode active material. The coating film includes a first film and a second film. The first film is formed on the surface of the negative electrode active material. The second film is formed on the first film. The first film contains a carboxymethyl cellulose polymer. The second film contains a polyacrylic acid polymer.

Abstract: A method of manufacturing a non-aqueous electrolyte solution secondary battery includes: (A) preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; (B) preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; and (C) manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material. The first positive electrode active material has an average discharge potential lower than that of the second positive electrode active material. The first conductive material has a first OAN. The second conductive material has a second OAN. A ratio of the second OAN to the first OAN is 1.3 or more and 2.1 or less. A sum of the first OAN and the second OAN is 31.64 ml/100 g or less.

Abstract: The non-aqueous electrolyte secondary battery 10 provided by the present invention comprises a positive electrode 30, a negative electrode 50 and a non-aqueous electrolyte. The negative electrode 50 includes a negative electrode current collector 52 and a negative electrode active material layer 54 formed on the current collector 52, the negative electrode active material layer 54 containing a negative electrode active material 55 capable of storing and releasing charge carriers and having shape anisotropy so that the charge carriers are stored and released along a predefined direction. The negative electrode active material layer 54 includes, at a bottom thereof contacting the current collector 52, a minute conductive material 57 with granular shape and/or minute conductive material 57 with fibrous shape having an average particle diameter that is smaller than that of the negative electrode active material 55, and includes, at the bottom thereof; a part of the negative electrode active material 55.

Abstract: A lithium ion secondary battery includes: an electrode mixture layer that contains an electrode active material and an organic ferroelectric having a dielectric constant of 25 or higher; and an electrolytic solution that contains lithium bis(fluorosulfonyl)imide and a nonaqueous solvent. A content of the organic ferroelectric is 0.5 parts by mass to 10 parts by mass with respect to 100 parts by mass of the electrode active material. A proportion of a high-polarity solvent having a dielectric constant of 10 or higher in the nonaqueous solvent is 10 vol % or lower.

Abstract: A manufacturing method of the invention includes: a process of preparing a positive electrode which includes a positive electrode mixture layer, a negative electrode which includes a negative electrode mixture layer, and a non-aqueous electrolyte; and a process of accommodating the positive electrode, the negative electrode, and the non-aqueous electrolyte in a battery case. The non-aqueous electrolyte contains lithium sulfate. In addition, when a BET specific surface area of the negative electrode mixture layer is referred to as X (m2/g) and an addition amount of the lithium sulfate with respect to a total amount of the non-aqueous electrolyte is referred to as Y (mass %), the following relationships are satisfied: 3?X?4.3; 0.02?Y?0.1; and Y/X?0.023.

Abstract: A method of manufacturing a nonaqueous electrolyte secondary battery includes: a kneading step of kneading a carbon-based negative electrode active material, a binder, and a sugar alcohol with each other to form a negative electrode mixture paste; and an application step of applying the negative electrode mixture paste to a negative electrode current collector to form a negative electrode mixture layer.

Abstract: Provided is a positive electrode for nonaqueous electrolyte secondary batteries including a positive electrode mixture layer formed of a positive electrode mixture paste containing a positive electrode active material. The positive electrode active material has a particle diameter of 2 ?m or more and less than 7 ?m. The positive electrode mixture layer includes a first mixture layer in which a maximum diameter of pores formed between particles of the positive electrode active material is more than 1.0 ?m and 5.0 ?m or less, and a second mixture layer in which a maximum diameter of the pores is 1.0 ?m or less. The second mixture layer is arranged closer to the current collector than the first mixture layer. A ratio of a thickness of the first mixture layer to a thickness of the second mixture layer is more than 0.1 and 1.0 or less.

Abstract: A flat-plate portion of a negative electrode composite material layer includes a first end portion at one end portion in a direction of axis of winding of a flat electrode winding assembly, a second end portion located opposite to the first end portion, and a central portion lying between the first end portion and the second end portion. The flat-plate portion of the negative electrode composite material layer is provided with a plurality of communication grooves. The communication groove includes a first terminal end portion at the first end portion, includes a second terminal end portion at the second end portion, includes in the central portion, a starting portion located closer to a bottom portion of a prismatic case relative to the first terminal end portion and the second terminal end portion, and extends from the starting portion toward the first terminal end portion and the second terminal end portion.

Abstract: A manufacturing method of the invention includes: a process of preparing a positive electrode which includes a positive electrode mixture layer, a negative electrode which includes a negative electrode mixture layer, and a non-aqueous electrolyte; and a process of accommodating the positive electrode, the negative electrode, and the non-aqueous electrolyte in a battery case. The non-aqueous electrolyte contains lithium sulfate. In addition, when a BET specific surface area of the negative electrode mixture layer is referred to as X (m2/g) and an addition amount of the lithium sulfate with respect to a total amount of the non-aqueous electrolyte is referred to as Y (mass %), the following relationships are satisfied: 3?X?4.3; 0.02?Y?0.1; and Y/X?0.023.

Abstract: Provided is a method for manufacturing a nonaqueous electrolyte secondary cell which can maintain and demonstrate an excellent cell characteristic over a long period of time. The method for manufacturing a nonaqueous electrolyte secondary cell provided by the present invention includes: a step of preparing a positive electrode having a positive electrode mix layer and a negative electrode having a negative electrode mix layer; and a step of housing the positive electrode and the negative electrode together with a nonaqueous electrolytic solution in a cell case. The nonaqueous electrolytic solution includes a Compound (I) constituted by lithium tris(oxalate)phosphate. When a BET specific surface area of the negative electrode mix layer is denoted by X (m2/g) and the amount of the Compound (I) added to the entire amount of the nonaqueous electrolytic solution is denoted by Y (% by mass), the following relationships are satisfied: 3?X?4.3; 0.4?Y?1.5; and (Y/X)?0.35.

Abstract: An inversion plate short-circuits the positive electrode external terminal and the negative electrode external terminal to each other by changing its position. A temperature sensitive member is disposed adjacent to the inversion plate on the side opposite to a direction in which the inversion plate changes its position. The volume of temperature sensitive member increases due to a rise in temperature. The temperature sensitive member contains aluminum phosphite and calcium carbonate.

Abstract: Provided is a non-aqueous electrolyte secondary battery in which an increase in resistance is suppressed when high rate pulsed charging and discharging is repeatedly carried out. The non-aqueous electrolyte secondary battery provided by the present disclosure is provided with: a positive electrode; a negative electrode; a separator; and a non-aqueous electrolyte solution. The separator is provided with a separator base made of a non-woven fabric; a first resin layer provided on a surface of the separator base that faces the positive electrode; and a second resin layer provided on a surface of the separator base that faces the negative electrode. In addition, a resin matrix of the first resin layer is constituted from polytetrafluoroethylene or a copolymer containing polytetrafluoroethylene as a primary component, and a resin matrix of the second resin layer is constituted from poly(vinylidene fluoride) or a copolymer containing poly(vinylidene fluoride) as a primary component.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode current collector, a first positive electrode mixture layer that is provided on the positive electrode current collector, and a second positive electrode mixture layer that is provided on the first positive electrode mixture layer. The first positive electrode mixture layer includes a first positive electrode active material and a first conductive material. The second positive electrode mixture layer includes a second positive electrode active material and a second conductive material. The first positive electrode active material includes a lithium composite oxide having a layered crystal structure. The second positive electrode active material includes a lithium composite oxide having an olivine-type crystal structure.

Abstract: A positive electrode mixture layer (12) includes a first layer (12a) that has a main surface MS and a second layer (12b) formed closer to the positive electrode current collector (11) side than the first layer (12a). A ratio of the volume of the first layer (12a) to the volume of the positive electrode mixture layer (12) is 20 to 75 vol %. The first layer (12a) contains lithium iron phosphate (LFP) (1) and lithium nickel cobalt manganese composite oxide (NCM) (2). A ratio of the mass of the LFP (1) to the total mass of the LFP (1) and the NCM (2) in the first layer (12a) is more than 0 and 80 mass % or less. The second layer (12b) contains NCM (2). A ratio of the mass of the LFP (1) to the total mass of the positive electrode active material in the positive electrode mixture layer (12) is 7.5 to 20 mass %. A maximum pore size of the first layer (12a) is 0.50 to 0.70 ?m.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode composite material layer containing first positive electrode active material particles containing a lithium nickel composite oxide, second positive electrode active material particles containing lithium iron phosphate, and a conductive material. A ratio of the second positive electrode active material particles in a total mass of the first positive electrode active material particles and the second positive electrode active material particles is not lower than 5 mass % and not higher than 20 mass %. A standard deviation ? representing distribution of an iron element satisfies a condition of 0.28???0.52 when distribution of the iron element is determined by conducting area analysis with an electron probe microanalyzer in a cross-section of the positive electrode composite material layer.

Abstract: A positive electrode collector includes a main body layer and a surface layer. The surface layer is provided at least at a portion of a surface of the main body layer where the positive electrode mixture layer is provided, and is made of a carbon material. A first positive electrode active material is made of first lithium complex oxide having a layered crystal structure. A second positive electrode active material includes a particle made of second lithium complex oxide having an olivine crystal structure, a carbon film provided at least at a part of a surface of the particle, and alginic acid salt provided at least at a part of a surface of the carbon film. A conducting agent in the positive electrode mixture layer includes a carbon particle and alginic acid salt provided at least at a part of a surface of the carbon particle.