Abstract: A power supply device includes a plurality of batteries and an exterior case. Each of the plurality of batteries includes an exhaust valve configured to open if an internal pressure becomes higher than a predetermined pressure. The exterior case accommodates the plurality of batteries and includes a collision-enhancing gas-releasing path for releasing a gas discharged through the exhaust valve to the outside of the exterior case. The collision-enhancing releasing path includes a first collision plate and a second collision plate configured such the gas collides against the first collision plate and the second collision plate and is then released to the outside of the exterior case. The first collision plate is configured to reflect a flow direction of the gas by collision of the gas against a surface of the first collision plate. The second collision plate faces the first collision plate.

Abstract: An electrode for a nonaqueous electrolyte secondary battery according to one aspect of the present disclosure is characterized by being provided with a negative electrode current collector and a negative electrode composite layer formed on the negative electrode current collector, wherein: the negative electrode composite layer includes carbon fibers and a negative electrode active substance containing graphite particles and a Si material; the graphite particles have a graphitization degree, obtained by X-ray diffraction, in the range of 70-80, and a particle internal porosity in the range of 1-5%; and the Si material content is in the range of 0.1-5.0 mass % relative to the total mass of the negative electrode active substance.

Abstract: This positive electrode for secondary batteries is characterized by comprising: a positive electrode current collector; and a positive electrode mixture layer that contains a positive electrode active material. The positive electrode for secondary batteries is characterized in that: when the positive electrode mixture layer is divided into two in the thickness direction, and the lower half on the positive electrode current collector side is denoted as a first region and the upper half on the surface side of the positive electrode current collector is denoted as a second region, the first region and the second region contain the same kind of electrical conductive material; and the D-band/G-band ratio (X) of the Raman spectrum obtained by the electrical conductive material in the first region is larger than the D-band/G-band ratio (Y) of the Raman spectrum obtained by the electrical conductive material in the second region.

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries comprises a lithium-transition metal composite oxide and a surface modification layer. The lithium transition metal composite oxide contains at least Al and 80 mol % or more Ni with reference to the total number of moles of metal elements excluding Li, and the surface modification layer contains at least Sr and is formed on the surface of primary particles of the lithium-transition metal composite oxide.

Abstract: The positive electrode active material for a lithium ion secondary battery contains a lithium-nickel composite oxide, in which the lithium-nickel composite oxide contains lithium, nickel, manganese, titanium, niobium, and optionally an element M1, an amount of substance ratio of the respective elements is represented as Li:Ni:Mn:M:Ti:Nb=a:(1?x1?y1?b?c):x1:y1:b:c (provided that, 0.95?a?1.25, (1?x1?y1?b?c)<0.80, 0.03?x1?0.35, 0?y1?0.35, 0.005?b?0.05, and 0.001<c?0.03), in the amount of substance ratio, (b+c)?0.06 and b>c are satisfied, and an amount of lithium to be eluted in water is 0.07% by mass or less.

Abstract: In a non-aqueous electrolyte secondary battery that is one example of the embodiment, a positive electrode mix layer comprises a positive electrode active material comprising a lithium transition metal composite oxide represented by general formula: LiaNibCo(1-b-c)AlcOd (0.9<a?1.2, 0.88?b?0.96, 0.04?c?0.12, 1.9?d?2.1) and lithium carbonate in an amount of 0.1 to 1.0% by mass relative to the mass of the positive electrode active material. The lithium transition metal composite oxide has the form of secondary particles formed by the aggregation of primary particles, wherein tungsten is present, on the surface of each of the primary particles, in an amount of 0.05 to 0.20 mol % relative to the total molar amount of non-Li-metal elements contained in the positive electrode active material.

Abstract: A cylindrical battery having a bottomed cylindrical outer can including a bottom surface part and a side surface part; a sealing body that closes an opening part of the outer can; and a gasket disposed between the outer can and the sealing body. The outer can has: a groove part that is formed such that a side surface section thereof extends from the outside to the inside and supports the sealing body with the gasket therebetween; and a shoulder part that is formed to face the groove part with the sealing body and the gasket therebetween and sandwiches the sealing body together with the groove part. At least a portion of the shoulder part extends radially inward of the sealing body from an inner end of the groove part, and an easily deformable part is formed on the shoulder part along the circumferential direction of the outer can.

Abstract: A battery pack includes battery cell including a discharge valve, and case housing battery cell. Case includes a plurality of fume ventilation holes through which discharged gas jetted from the discharge valve is expelled out of the case, and diffusion gap is provided between discharge valve side end surface of battery cell and a case inner surface, with flameproof cover disposed in diffusion gap. Additionally, expansion space for the discharged gas diffused by flameproof cover is provided inside case, and the direction of expelling the discharged gas is changed to a direction intersecting a direction in which the discharged gas is jetted form the discharge valve. Expansion space communicates with diffusion gap and with fume ventilation holes, and a direction changing portion that changes a direction of the flowing gas is provided at corners of the case.

Abstract: A positive electrode for secondary is provided with a positive electrode mixture layer, and is characterized in that: the positive electrode mixture layer contains a positive electrode active material A which is composed of single crystalline particles of a lithium-containing composite oxide and a positive electrode active material B which is composed of polycrystalline particles of a lithium-containing composite oxide; the positive electrode active material A has a carbonaceous coating film that covers the surface of each of the single crystalline particles; the coating amount of the carbonaceous coating film covering the surfaces of the single crystalline particles is 1% by mass to 10% by mass relative to the mass of the lithium-containing composite oxide of the single crystalline particles; and with respect to the positive electrode active material B, the surfaces of the polycrystalline particles are not covered by a carbonaceous coating film.

Abstract: A positive electrode active material for a secondary battery, which is one aspect of the present disclosure, is characterized by including a lithium-containing composite oxide composed of secondary particles in which primary particles are aggregated, and by that the lithium-containing composite oxide contains Ni at 85 mol % or more with respect to the total molar amount of metal elements excluding lithium, and Al, the Al concentration in the vicinity of the surface of the secondary particles is higher than the Al concentration in the central portion of the secondary particles, and a metal element M (M is at least one of Mg, Ca, Sr, Na, K, Zr, Co, Nb, W, and Mo) at 0.01-2.0 mol % and sulfate ions at 0.02 mol % or more with respect to the molar amount of the lithium-containing composite oxide are present on the surface of the primary particles.

Abstract: The purpose of the present disclosure is to provide a cylindrical battery in which a short circuit between an outer can and a sealing body can be suppressed. In a cylindrical battery (10) according to an embodiment of the present disclosure, a gasket (28) includes an extension part (29) extending from between a sealing body (17) and a tip (33a) on a radially inward side of a shoulder (33) of an outer can (16). The extension part (29) is arranged so that the gasket (28) intersects any straight lines connecting an upper surface (47) of the shoulder (33) opposite to the electrode body side in the axial direction and an upper surface (41) of an inner portion (40) opposite to the electrode body side in the axial direction, the inner portion (40) being located radially inward of the shoulder (33) in the sealing body (17).

Abstract: In a non-aqueous electrolyte secondary battery that is one example of an embodiment of the present invention, a positive electrode has a positive electrode core material and a positive electrode mixture layer that is formed on a surface of the positive electrode core material. As a positive electrode active material, the positive electrode mixture layer contains: first lithium metal composite oxide particles that are non-agglomerated particles having a volume-based median diameter of 2 to 10 ?m; and second lithium metal composite oxide particles that are secondary particles which result from agglomeration of primary particles having an average particle diameter of 50 nm to 2 ?m, and which have a volume-based median diameter of 10 to 30 ?m. The first lithium metal composite oxide particles are included more in a first region than in a second region. A non-aqueous electrolyte contains a silane compound having a carbon-carbon unsaturated bond.

Abstract: A negative electrode of this non-aqueous electrolyte secondary battery has a negative electrode electric current collector, an inner winding side negative electrode mix layer, and an outer winding side negative electrode mix layer. The inner winding side negative electrode mix layer and the outer winding side negative electrode mix layer each has a first negative electrode mix layer facing the negative electrode electric current collector, and a second negative electrode mix layer facing the positive electrode. The first negative electrode mix layer includes graphite particles having an internal porosity of 6-20% and the second negative electrode mix layer includes graphite particles having an internal porosity of 5% or less. In the inner winding side negative electrode mix layer, the thickness t1 of the first negative electrode mix layer and the thickness t2 of the second negative electrode mix layer satisfy the relationship t1/t2<1.

Abstract: This electrode plate has a strip-like core, a mixture layer formed on both sides of the core, and an exposed section in which the core is exposed, and which is provided so as to be in contact with one short-direction end of the core. The exposed section is provided in mutually opposing positions on both sides of the core and is adjacent to the mixture layer in the short direction and long direction of the core. A lead is connected to the exposed section so as to extend out of one end on either surface of the core. An identification display part by which a manufacturing process history can be identified is formed in the exposed section on either surface of the core.

Abstract: In the battery pack, battery cell including a discharge valve is housed in case, and flame-retardant cap is disposed at a position facing discharge valve side end surface of battery cell. Flame-retardant cap includes collision plate disposed at a position facing discharge valve side end surface and wall formed around collision plate, the discharge valve of the battery cell and a region in proximity are arranged inside peripheral wall, and reverse ejection gap is provided between battery cell and peripheral wall. An expansion space of the discharge gas flowing in from reverse ejection gap is provided inside case. In the expansion space, the discharge gas ejected from the discharge valve collides with collision plate of flame-retardant cap, and fills the expansion space via diffusion gap and reverse ejection gap.

Abstract: A nonaqueous electrolyte secondary battery positive electrode comprises a positive electrode mixture layer that contains, as positive electrode active materials, first lithium-containing transition metal composite oxide particles, which are non-aggregated particles having a volume-based median diameter of 2-10 ?m, and second lithium-containing transition metal composite oxide particles, which are secondary particles having a volume-based median diameter of 10-30 ?m and formed by the agglomeration of primary particles having an average particle diameter of 50 nm-2 ?m, and that has a first layer formed on the positive electrode core material side and a second layer formed on the first layer. The first layer contains at least the first composite oxide particles, and the content of said composite oxide particles is 80% or more relative to the total mass of the positive electrode active materials contained in the first layer. The second layer contains at least the second composite oxide particles.

Abstract: A battery pack includes a battery block including battery cells connected to one another and a case accommodating the battery block. Each battery cell includes a discharge valve on an end surface of the cell which is configured to open when an internal pressure exceeds a predetermined pressure. The battery cells are arranged on a straight line such that respective end surfaces of the calls face each other. The battery block has a discharge gap between the end surfaces of the cells facing each other which is configured to guide exhaust gas from the discharge valve The case includes lower case, an upper case, a heat dissipation plate arranged in lower case and between the lower case and battery block, and a bendable heat-resistant cover protruding from a side edge of the heat dissipation plate and arranged at a position covering an opening of discharge gap.

Abstract: A layered electrode body manufacturing device comprising: a negative electrode cut drum cuts a negative electrode single plate at a first width, generates a negative electrode plate, and conveys same; a negative electrode heat drum heats the negative electrode plate; a positive electrode cut drum cuts a positive electrode single plate at a second width, generates a positive electrode plate, and conveys same; a positive electrode heat drum heats the positive electrode plate; and a bonding drum which positions the negative electrode plate on a first separator single plate, positions a second separator single plate thereon, and positions and bonds the positive electrode plate thereon. The pressing forces between the bonding drum, and the negative and positive electrode heat drums are adjusted. At least a portion of two sides from the outer edge part of the electrode plate is bonded to a separator, and the other two sides are not.

Abstract: A sealed battery with a battery case that includes a bottomed cylindrical outer can and an opening-sealing body that closes an opening section of the outer can; and an electrode body that is accommodated inside the battery case. The opening-sealing body includes a metal plate, and the metal plate includes a protruding section that bulges toward the outside of the battery cast, and a flange section that is formed on the circumference of the protruding section. The protruding section includes an inclination section that inclines inward from the radial outside of the opening sealing body so as to be progressively separated from the electrode body, wherein a thin wall section, which has a thickness less than portions other than the inclination section and is preferably broken when the inner pressure of the battery case exceeds a predetermined threshold, is formed in at least a portion of the inclination section.

Abstract: A method of manufacturing a positive electrode active material for a lithium-ion secondary battery includes a water-washing step of washing a lithium-nickel composite oxide containing Li, Ni, and an element M with water, and conducting a filtration to form a washed-cake, a mixing step of mixing, while heating, the washed-cake and a tungsten compound without lithium while heating to obtain a tungsten mixture, and a heat treatment step of heat-treating the tungsten mixture, wherein a water content of the washed-cake is 3.0% by mass or more and 10.0% by mass or less, a ratio of a number of tungsten atoms contained in the tungsten mixture to a total number of nickel and the element M atoms contained in the lithium-nickel composite oxide is 0.05 at. % or more and 3.00 at. % or less, and a temperature of the mixing step is 30° C. or higher and 70° C. or lower.