Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery that can suppress damage to an electrode body in the vicinity of an end of an insulation tape due to repetition of charging and discharging. A non-aqueous electrolyte secondary battery is characterized by comprising: an exterior body; a wound-type electrode body which is housed in the exterior body and in which a positive electrode and a negative electrode are wound with a separator interposed therebetween; and an insulation tape stuck to the electrode body. The non-aqueous electrolyte secondary battery is also characterized in that the insulation tape has a base material layer and an adhesive layer that is provided on a main surface of the base material layer, and a side surface of the base material layer is non-vertically inclined with respect to the main surface.

Abstract: The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery configured to suppress the occurrence of internal short-circuiting in the vicinity of the inner side end of winding. This nonaqueous electrolyte secondary battery. according to one embodiment includes: an electrode body in which a positive electrode and a negative electrode are wound with a separator therebetween; a nonaqueous electrolyte; and an exterior body for housing the electrode body and the nonaqueous electrolyte. A negative electrode (12) includes a first negative electrode active material, and a second negative electrode active material, the second negative electrode active material exhibiting a greater expansion rate than the first negative electrode active material during charging.

Abstract: A conductive member is disposed on a side of the sealing plate adjacent to an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector, which is electrically connected to positive electrode plates. A second insulating member is disposed between the deformation plate and the first positive-electrode current collector. Fixing projections and displacement prevention projections are provided on a surface of the second insulating member. The second insulating member is fixed to the first positive-electrode current collector such that the fixing projections are disposed in fixing holes in the first positive-electrode current collector.

Abstract: A battery module includes a plurality of cylindrical batteries and lead plate connected to cylindrical batteries and electrically connecting the plurality of cylindrical batteries. Cylindrical battery includes can bottom valve including a thin-walled line ruptured and opening an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure. Lead plate includes double-supported arm arranged opposing a can bottom of cylindrical battery and coupled to lead plate at both ends at a position opposing can bottom valve, and gas permeation gap of exhaust gas ejected from the exhaust port on both sides of double-supported arm.

Abstract: A plurality of battery cells each having a prismatic shape, a fixing member that fixes the plurality of battery cells in a stacked state, and a thermal insulation sheet that is sandwiched between stacking surfaces of battery cells and thermally insulates the adjacent battery cells, wherein thermal insulation sheet is an inorganic fiber sheet in which inorganic fibers are aggregated in a three-dimensionally non-directional manner and fine voids are provided between the inorganic fibers.

Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35 r of the center.

Abstract: A positive electrode terminal is inserted into a current-collector through hole formed, in a positive electrode current collector and riveted in a spot-faced hole formed in the positive electrode current collector. A protrusion is formed on a bottom surface of the spot-faced hole so as to extend around the current-collector through hole, and a riveted portion of the positive electrode terminal covers the protrusion. The riveted portion of the positive electrode terminal is weld-connected to an edge of the spot-faced hole.

Abstract: The present disclosure provides a non-aqueous electrolytic solution secondary battery capable of suppressing increase of initial resistance when an isocyanate group-containing compound is added to a non-aqueous electrolytic solution. The non-aqueous electrolytic solution secondary battery according to one embodiment of the present disclosure has: a wound type electrode body in which a positive electrode and a negative electrode are wound with a separator interposed therebetween; and a battery case for housing the wound type electrode body and the non-aqueous electrolytic solution. The relation between a nitrogen element concentration A1 derived from an isocyanate group-containing compound in an outermost circumferential surface 2a of the wound type electrode body, and a nitrogen element concentration B derived from an isocyanate group-containing compound in an inner region located further in than the outermost circumferential surface of the wound type electrode body, satisfies A1>B.

Abstract: A separator for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure comprises a porous base material and a heat-resistant porous film that is arranged on at least one surface of the porous base material so as to face an electrode of a nonaqueous electrolyte secondary battery. The heat-resistant porous film contains a filler and a binder; and at least a part of a facing part A of the heat-resistant porous film, said facing part A facing the edge portion of the electrode, has a higher binder content than a facing part B of the heat-resistant porous film, said facing part B facing the central portion of the electrode.

Abstract: A nonaqueous electrolyte secondary battery provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. An electrode mixture layer of the positive electrode contains: first lithium metal composite oxide particles that are non-aggregated particles which have a volume-based median diameter of from 2 ?m to 10 ?m; and second lithium metal composite oxide particles that are secondary particles, in each of which primary particles having an average particle diameter of from 50 nm to 2 ?m aggregate, and which have a volume-based median diameter of from 10 ?m to 30 ?m. With a first region and the second region sequentially halved from the surface side of the positive electrode mixture layer, the content of the first lithium metal composite oxide particles in the first region is higher than the content of the first lithium metal composite oxide particles in the second region.

Abstract: An electrode for a non-aqueous electrolyte secondary battery, which is an example of an embodiment, has a belt-shaped negative electrode current collector and a negative electrode mixture layer formed on the surface of the negative electrode current collector. The negative electrode mixture layer contains a first Si-based active material and a second Si-based active material, each of which has a structure in which Si particles are dispersed in an oxide phase. The Si particle content in the first Si-based active material is higher than the Si particle content in the second Si-based active material, and, in the negative electrode mixture layer, the ratio of the mass of the first Si-based active material to the total mass of the first Si-based active material and the second Si-based active material is greater at the center than at the end in the width direction of the negative electrode current collector.

Abstract: A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

Abstract: Disclosed are a connection assembly for a battery module and a battery module. The connection assembly for a battery module has a housing body, a cover plate and an openable and closable door, wherein the housing body is used for supporting a plurality of components; the cover plate covers the housing body and used for covering the plurality of components on the housing body; the cover plate is provided with a second through-hole, and the second through-hole positionally corresponds to at least one of the plurality of components; the openable and closable door is movably mounted on the cover plate, and is positionally changeable between an open position and a closed position; wherein in the open position, the openable and closable door opens the second through-hole to expose the at least one of the plurality of components; and in the closed position, the openable and closable door shields at least part of the second through-hole to cover the at least one of the plurality of components on the body.

Abstract: At one edge of a positive electrode plate in a winding axis direction of an electrode body, two positive electrode tabs per turn are provided to protrude from the edge. At the other edge of a negative electrode plate in the winding axis direction of the electrode body, two negative electrode tabs per turn are provided to protrude from the edge. The multiple positive electrode tabs provided to protrude from the positive electrode plate include multiple types of positive electrode tabs having different protrusion lengths and proximal end widths, and the multiple negative electrode tabs provided to protrude from the negative electrode plate include multiple types of negative electrode tabs having different protrusion lengths and base end widths.

Abstract: A conductive member is disposed on a side of the sealing plate adjacent to an electrode assembly with a first insulating member disposed therebetween. The conductive member has a conductive-member opening portion. The conductive-member opening portion of the conductive member is sealed by a deformation plate. The deformation plate is connected to a first positive-electrode current collector, which is electrically connected to positive electrode plates. A second insulating member is disposed between the deformation plate and the first positive-electrode current collector. Fixing projections and displacement prevention projections are provided on a surface of the second insulating member. The second insulating member is fixed to the first positive-electrode current collector such that the fixing projections are disposed in fixing holes in the first positive-electrode current collector.

Abstract: A sealed battery, which is an exemplary embodiment, comprises a battery case including a bottomed cylindrical outer can and a sealing body that closes an opening of the outer can, a gasket disposed between the outer can and the sealing body, and an electrode body including an electrode and housed in the battery case. The sealing body includes a metal plate, and the metal plate has a thin portion formed in an annular shape, a valve portion having a convex shape inside the battery case, and an annular portion to which the electrode lead is connected. The gasket is provided with an elastically deformable portion that abuts against the inner surface of the valve portion and urges the valve portion to the outside of the battery case.

Abstract: A secondary battery according to an embodiment includes: an electrode body which contains a positive electrode, a negative electrode, and at least one separator interposed between the positive electrode and the negative electrode; a case main body which receives the electrode body; a sealing body which seals an opening portion of the case main body; and a sealing body-side insulating member provided between the sealing body and one end portion of the electrode body and a case main body-side insulating member; the one end portion and the other end portion of the electrode body each form a protruding section; and the sealing body-side insulating member includes a base material and an adhesive layer which is disposed on the base material and which contains a cured object of a curable resin, and the protruding section of the one end portion of the electrode body is adhered to the adhesive layer.

Abstract: The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery that has excellent cycle characteristics. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with: an electrode body that comprises a positive electrode, a negative electrode and a separator; and a nonaqueous electrolyte. A mixture layer of the negative electrode contains a negative electrode active material, at least either one of carboxymethyl cellulose or a salt thereof, and at least either one of sorbic acid or a salt thereof; and the content of the sorbic acid and/or a salt thereof is 1,500 ppm or less relative to the mass of the mixture layer.

Abstract: A first secondary battery cell and a second secondary battery cell each having a cylindrical shape and connected in series and/or in parallel with each other are aligned and housed in such postures that side surfaces of the cylindrical shapes face each other. A battery pack includes: a longitudinal partition plate disposed at an interface between the first secondary battery cell and the second secondary battery cell housed in an internal space of a housing case; a lead plate that crosses the longitudinal partition plate; and a lateral partition plate that covers the end surfaces of the first secondary battery cell and the second secondary battery cell. The lateral partition plate and the lead plate pass through a longitudinal side slit in a state of overlap between the lateral partition plate and the lead plate.

Abstract: A nonaqueous electrolyte secondary battery positive electrode according to an aspect of the present disclosure is provided with a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector. The positive electrode mixture layer contains a positive electrode active material, fibrous carbon, and nonfibrous carbon. When the positive electrode mixture layer is divided into two equal regions in the thickness direction, and the half of the regions that is on the positive electrode collector side is defined as a first region and the half of the regions that is on the outer surface side is defined as a second region, the mass proportion of the fibrous carbon with respect to the total mass of the fibrous carbon and the nonfibrous carbon in the first region is set to be less than that in the second region.