Abstract: A battery including: a battery can including a cylinder portion including an opening edge portion at one end portion of the cylinder portion and a bottom portion that closes the other end portion of the cylinder portion; an electrode body; a sealing member that seals an opening of the opening edge portion. The sealing member includes: a sealing plate; a cap connected to the sealing plate and electrically insulated from the sealing plate; and a sealing portion sealing a space between the cylinder portion and the cap. The cap includes: a ring-shaped top plate portion opposing the opening edge portion in an axial direction of the cylinder portion; and a side wall portion covering an outer circumferential surface of the cylinder portion. The sealing portion may be a gasket provided between the cap and the cylinder portion in a compressed state. The cap is electrically connected to the cylinder portion.

Abstract: A current collector plate includes: a body part that is plate-shaped (radial extending part); and a tongue part that includes a base piece that is connected to the body part (radial extending part) and a tip piece that is bent from the base piece. The tongue part extends from an edge of the body part. The edge extends in a radial direction. The tongue part includes a cantilever structure in which only one end of the tongue part in a direction in which the tongue part extends from the edge is connected to the body part.

Abstract: In the present invention, an electrode terminal of a battery includes: a first connection part that encloses one side in an axial direction of an annular groove portion provided in a circumferential wall of the battery; a second connection part that encloses another side in the axial direction of the groove portion; and a bridge portion that connects the first connection part and the second connection part. When the swelling of the battery causes the groove portion to expand in the axial direction, the bridge portion ruptures and thereby blocks a current flowing between the first connection part and the second connection part.

Abstract: A power storage device includes a first electrode having a first current collector, a second electrode having a second current collector, and a separator interposed between the first electrode and the second electrode. The first electrode, the second electrode, and the separator constitute a wound body having a columnar shape. The power storage device further includes a case having a cylindrical bottomed shape for accommodating the wound body, and a current collection plate electrically connected to the first electrode and the case. The first electrode has an overlapping region overlapping the current collection plate when viewed from a case axial direction and a non-overlapping region not overlapping the current collection plate when viewed from the axial direction. The first electrode and the current collection plate are electrically connected to each other in the overlapping region.

Abstract: A battery module includes: cells, wherein each of the cells including a positive electrode terminal and a negative electrode terminal disposed on one end part, the one end parts being positioned on a same side, and a battery block is constituted by a row of the plurality of cells. The battery module further includes a plate disposed above the one end parts of the cells being arranged, and the plate includes: holes through which the positive electrode terminal and the negative electrode terminal are exposed; and a plurality of conductive members disposed on a surface. The plurality of conductive members extend along the row, two of the plurality of conductive members are disposed in the battery block, and each of the plurality of conductive members includes terminal connecting parts connected through the holes to the terminals of a same pole.

Abstract: A plate-shaped current collector plate includes a first main surface and a second main surface that is opposite to the first main surface. The current collector plate includes: a first portion that is positioned at a central portion of the current collector plate; a plurality of second portions that extend in a first direction away from the first portion; and a plurality of third portions which extend from portions of the plurality of second portions spaced apart from the first portion and protrude in a second direction that intersects with the first direction. In two adjacent second portions of the plurality of second portions, a gap is provided between a third portion that extends from one of the two adjacent second portions among the plurality of third portions and a third portion that extends from an other one of the two adjacent second portions among the plurality of third portions.

Abstract: A power storage device includes: a first electrode including a first current collector having an elongated sheet shape and a first active material layer supported on the first current collector; a second electrode including a second current collector having an elongated sheet shape and a second active material layer supported on the second current collector; a separator interposed between the first electrode and the second electrode; a non-aqueous electrolyte; and a first current collecting plate electrically connected to the first current collector, wherein the first electrode, the second electrode, and the separator constitute a columnar wound body, a first end in a longitudinal direction of the first current collector is a first exposed part not having the first active material layer and protruding from a first end surface of the wound body, a first tab extends from the first exposed part, the first tab covers at least a part of the first exposed part on an inner peripheral side inside the first tab, and t

Abstract: A lithium secondary battery including positive and negative electrodes including positive and negative electrode current collectors with elongated sheets, respectively, and a negative electrode external terminal electrically connected to the negative electrode current collector, and a negative electrode connection portion interposed between the negative electrode current collector and the negative electrode external terminal, wherein in the negative electrode, a lithium metal deposits during charging and the lithium metal dissolves during discharging, the positive electrode, the negative electrode, and a separator form an electrode group of a cylindrical wound body, and the negative electrode connection portion includes (i) an end portion along a longitudinal direction of the negative electrode current collector projecting from one end face of the wound body, or (ii) a plurality of negative electrode tab-leads electrically connected to the negative electrode current collector and extending from the one end fa

Abstract: A positive electrode, which is an example of this secondary battery electrode, includes: a positive electrode core material; an electrically conductive adhesive layer disposed on the positive electrode core material; and a positive electrode mixture layer disposed on the adhesive layer. The positive electrode core material includes, at one end in a lateral direction of the positive electrode core material, an exposed portion where the adhesive layer and the positive electrode mixture layer are not disposed. An insulating protection layer that includes resin is disposed on the exposed portion of the one end. A predetermined gap is provided between the protective layer and an end surface of one end in the lateral direction of the adhesive layer.

Abstract: A sealing plate of the present disclosure includes a flange part in an annular shape provided on an outer peripheral edge, a raised part in an annular shape located nearer to a center than the flange part and being thicker than the flange part, a fragile part located nearer to the center than the raised part and being thinnest in the sealing plate, a relay part in an annular shape located nearer to the center than the fragile part, and a middle part located nearer to the center than the relay part and including a center part of the sealing plate, wherein in the thickness direction of the sealing plate, the fragile part is apart from the flange part in the first direction, and the relay part protrudes toward a second direction that is opposite to the first direction in the thickness direction.

Abstract: A positive electrode that is an example of an electrode for a secondary battery comprises: a positive electrode core material, a conductive adhesive layer disposed on the positive electrode core material, and a positive electrode mixture layer disposed on the adhesive layer, wherein: the positive electrode core material has, at one end in the short direction of the positive electrode core material, an exposed part on which the adhesive layer and the positive electrode mixture layer are not provided; an insulating protective layer containing a resin is disposed on the exposed part at the one end; and the protective layer is in contact with the end surface at one end of the adhesive layer and the positive electrode mixture layer in the short direction.

Abstract: This positive-electrode active material for non-aqueous electrolyte secondary batteries is provided with: an electrode assembly; a bottomed cylindrical exterior body having an outer diameter of 25 mm or more, that houses the electrode assembly and is connected to a negative electrode; and, a sealing body that seals an opening at the upper end of the exterior body and is connected to a positive electrode. The positive electrode includes a positive-electrode current collector, and a positive-electrode mixture layer formed on the surface of the positive-electrode current collector and containing a positive-electrode active material and an electroconductive agent. The positive-electrode active material includes a lithium-containing composite oxide having a chalcogen compound and/or a halogen compound adhered to the surface and a layered rock salt structure. Area basis weight of the positive-electrode mixture layer is 250 g/m2 or more. In the electrode assembly, three or more positive-electrode leads are led out.

Abstract: This positive electrode included in an electrode assembly includes a positive electrode current collector and a positive electrode mixture laver which is formed on the surface of the positive electrode current collector and which includes a positive electrode active material and a conductive agent. The positive electrode active material contains a lithium-containing complex oxide. The lithium-containing complex oxide has a layered rock salt structure, contains substantially no Co, and contains at least Ni and Mn. The Ni content in the lithium-containing complex oxide is not less than 70 mol % with respect to the total number of moles of metal elements excluding Li. The basis weight of the positive electrode mixture layer is not less than 250 g/m2. Three or more positive electrode leads are drawn out in the electrode assembly.

Abstract: A watercraft propulsion device includes: a motor driving a propulsion unit; a battery supplying electric power to the motor; and a gas flow passage including one end communicating with the battery and another end communicating with a region that is outside a watercraft hull and is located lower than an upper end of a shell panel disposed at an edge of the watercraft hull, the gas flow passage exhausting a gas ejected from the battery from the other end to outside of the watercraft hull.

Abstract: A battery including: a battery can having a cylindrical portion, a bottom wall closing one end of the cylindrical portion, and an open rim continuous with the other end of the cylindrical portion; an electrode body housed in the cylindrical portion; and a sealing body fixed to the open rim so as to seal an opening defined by the open rim. The sealing body includes a sealing plate and a gasket disposed at a peripheral portion of the sealing plate. The gasket has at least one protruding portion configured to restrict insertion of the sealing body into the open rim.

Abstract: A power storage device includes a first electrode having a strip first current collector and a first active material layer carried on the first current collector, a second electrode having a strip second current collector and a second active material layer carried on the second current collector, and a separator interposed between the first electrode and the second electrode. The first electrode, the second electrode, and the separator form a columnar wound body. The first current collector has a plurality of first tabs electrically connected to one end along the longitudinal direction of the first current collector and extending radially inward of the wound body. The first tab has a proximal end portion connected to the first current collector, and a first wide portion wider than the proximal end portion. The plurality of first tabs are overlapped and welded to each other at their first wide portions.

Abstract: A power storage device includes a first electrode having a first current collector, a second electrode having a second current collector, and a separator, which form a columnar wound body. The power storage device includes a cylinder covering an outer periphery of the columnar wound body and having a first opening, a sealing body sealing the first opening, and at least one first tab, its one end connected to the first current collector and the other end connected to the sealing body. The sealing body has a first member including a first face facing away from the columnar wound body, and a second member including a second face facing the columnar wound body. The other end of the first tab is welded to the first face of the first member to form a first welding portion that is positioned between the first face and the second face.

Abstract: A power storage device has a columnar wound body in which a first and second electrode are placed on top of another with a separator interposed therebetween. The first electrode has a first portion, a second portion, and a first connection portion that connects the first and second portion, and the first and second portion face each other. The first connection portion is provided in a band region of the first current collector along the winding direction of the wound body, as a first exposed portion not having the first active material layer and exposing the first current collector. The first and second portions are portions each having the first active material layer at both sides of the first connection portion. The second electrode is sandwiched by the first portion and the second portion with the separator interposed therebetween, and wound along the winding direction to form the wound body.

Abstract: A power storage device includes a first electrode having an elongated sheet first current collector, and a first active material layer carried on the first current collector, an elongated sheet second electrode, a separator interposed between the first electrode and the second electrode, a non-aqueous electrolyte, and a first current collecting portion electrically connected to the first current collector, wherein the first electrode, the second electrode, and the separator form a columnar wound body, one end portion along a longitudinal direction of the first current collector is a first exposed portion not having the first active material layer and projected from one end face of the wound body, the first current collecting portion has a porous metal portion, and one or more projected portions that are pressed into the porous metal portion, and the porous metal portion fills the gap of the first exposed portion.

Abstract: A battery includes a metal battery can that has a tubular portion having an opening edge portion and a bottom portion; an electrode body that is in the battery can; an electrolytic solution that fills the battery can; and a sealing member that has an outer peripheral surface facing an inner peripheral surface of the opening edge portion of the tubular portion and is configured to seal the opening edge portion. A part of the inner peripheral surface of the opening edge portion and a part of the outer peripheral surface of the sealing member are joined by a melting portion, and a preventing portion is on the outer peripheral surface of the sealing member, the preventing portion being configured to prevent the electrolytic solution from rising toward a position, in which the melting portion is formed.