Abstract: The present disclosure provides a technique that enables a contraction of a separator due to generation of heat by an electrode body to be appropriately suppressed and an internal short circuit due to a contraction of the separator to be preferably prevented. In a sealed battery 1 disclosed herein, a core portion 22 is formed such that a distance L1 and a distance L2 satisfy 1<L1/L2<1.8, the distance L1 being a shortest distance between a positive electrode side edge portion 22a that is a side edge portion of the core portion 22 on a side of a positive electrode connecting portion 24 and a side edge portion on a side of the core portion 22 of a positive electrode-connected location 32 and the distance L2 being a shortest distance between a negative electrode side edge portion 22b that is a side edge portion of the core portion 22 on a side of a negative electrode connecting portion 26 and a side edge portion on the side of the core portion 22 of a negative electrode-connected location 42.

Abstract: A region of a hole-inner circumferential surface composing a portion defining a terminal through-hole, the region being located on the battery case cover side, include a tapered surface gradually enlarged in diameter as extending toward the battery case cover side and opening toward the battery case cover side; when riveting is carried out, a region of a shaft portion, the region being located inward of the tapered surface, is enlarged in diameter so as to form an annular projecting portion in contact with the tapered surface; and a hole circumferential portion located around the portion defining the terminal through-hole is held between the external enlarged-diameter portion and the annular projecting portion so as to fix a first terminal member to a second terminal member.

Abstract: A portion of an insulation member makes contact with a surface of a lid body by receiving a caulking force from a caulking member either directly or indirectly via another member. When not receiving the caulking force, a surface of the portion of the insulation member facing the lid body becomes a curved surface which indicates a curve bulging in a load direction of a caulking load on a cut plane, the cut plane cutting the portion of the insulation member in a longitudinal direction of the lid body. When kept in the fastened state by receiving the caulking force, the portion of the insulation member is elastically deformed and the surface of the portion of the insulation member facing the lid body is brought into close contact with the surface of the lid body.

Abstract: A method for manufacturing a bottomed cuboid battery container includes: forming a first member by folding one piece of a first flat sheet, the first member being constructed of a quadrilateral bottom surface and first paired side surfaces, the first paired side surfaces continuing from the bottom surface and being oppose each other; and forming the bottomed cuboid battery container by welding each of a second flat sheet and a third flat sheet to the first member such that the second flat sheet and the third flat sheet oppose each other and constitute second paired side surfaces. The second flat sheet and the first member are welded from one direction. The third flat sheet and the first member are welded from one direction.

Abstract: A battery is provided with a lid member that closes a case, a collector terminal member having an insert-through part, an insulator that electrically insulates the lid member and the collector terminal member, and a gasket that provides a seal between the lid member and the collector terminal member. The lid member has a protrusion protruding downward in the vertical direction from the bottom. A gasket is in the same position as the protruding section in an inside-outside direction, which is perpendicular to the vertical direction, and has a sealing part pressed by the protruding section. At least one gap exists in the vicinity of the seal section in a different position to the seal section in the inside-outside direction, and at least portions of the gaps are enclosed by the gasket and the collector terminal member.

Abstract: A battery includes: an insulating plate; a connecting terminal plate; a terminal bolt that passes through the connecting terminal plate, the bolt head being between the insulating plate and the connecting terminal plate, and having a regular N-sided polygon shape, the N being an even number; and a nut. The insulating plate includes a first rotation stopping wall near an end of the insulating plate; the first rotation stopping wall includes a first a first abutting location that abuts the bolt head being rotated in a tightening direction of the nut, and a second abutting location that abuts the bolt head being rotated in a loosening direction of the nut; and a distance from the first abutting location to the first end is greater than a distance from the second abutting location to the first end.

Abstract: A battery provided according to the invention includes an electrode body including a positive electrode and a negative electrode, and a battery case. A positive electrode inner terminal is connected to the positive electrode, and a negative electrode inner terminal is connected to the negative electrode. The battery includes, inside the battery case, a first film placed between the electrode body and an inner wall of the battery case, and a second film placed between the battery case and at least one of the negative electrode inner terminal and the positive electrode inner terminal. By the first film and the second film, at least one of the negative electrode inner terminal and the positive electrode inner terminal is insulated from the inner wall of the battery case, and the electrode body is insulated from the inner wall of the battery case.

Abstract: A portion of an insulation member makes contact with a surface of a lid body by receiving a caulking force from a caulking member either directly or indirectly via another member. When not receiving the caulking force, a surface of the portion of the insulation member facing the lid body becomes a curved surface which indicates a curve bulging in a load direction of a caulking load on a cut plane, the cut plane cutting the portion of the insulation member in a longitudinal direction of the lid body. When kept in the fastened state by receiving the caulking force, the portion of the insulation member is elastically deformed and the surface of the portion of the insulation member facing the lid body is brought into close contact with the surface of the lid body.

Abstract: A battery includes: a battery case having a case body member and a case lid member having a through hole; a rivet that engages with the through hole; and a gasket. The through hole is hermetically sealed with the gasket interposed between the circumferential outer surface of the case lid member and an outer flange of the rivet. The case lid member is configured such that, in a state wherein a peripheral edge portion connected to an opening end portion of the case body member, the circumferential outer surface is positioned in the axial outward direction such that the circumferential outer surface faces further towards the outer side along the axis line of the through hole than the peripheral edge portion and the opening end portion.

Abstract: A sealed battery 10 is provided, which has a seam 45 between a case main body 21 and a lid 22 on an outer surface 22A side of the lid 22, and in which this seam 25 is laser welded. A terminal 40 connected to an electrode assembly in the battery 10 is led to the outside from a through hole in the lid 22 and is separated from the lid outer surface 22A by an outside resin member 60. The outside resin member 60 is constituted of a resin matrix 62, which is formed of a nonaromatic resin composition, and inorganic fibers 64 present dispersed in the resin matrix 62. At least 50% by mass of the inorganic fibers 64 in the outside resin member 60 is disposed such that the fiber axial direction of the inorganic fibers 64 is parallel to the outer surface of the lid 22.

Abstract: A sealed battery includes a filling hole, and a gasket and a blind rivet that seal the filling hole. A tapered surface that is inclined toward an inside of a battery case is formed around the filling hole of the battery case. The filling hole is sealed by the gasket and the blind rivet by the blind rivet plastic deforming.

Abstract: A region of a hole-inner circumferential surface composing a portion defining a terminal through-hole, the region being located on the battery case cover side, include a tapered surface gradually enlarged in diameter as extending toward the battery case cover side and opening toward the battery case cover side; when riveting is carried out, a region of a shaft portion, the region being located inward of the tapered surface, is enlarged in diameter so as to form an annular projecting portion in contact with the tapered surface; and a hole circumferential portion located around the portion defining the terminal through-hole is held between the external enlarged-diameter portion and the annular projecting portion so as to fix a first terminal member to a second terminal member.

Abstract: Provided is a technique for suppressing welding faults caused in sealing a case of a sealed battery by laser welding. A step for manufacturing a sealed battery having a case sealed by a sealing plug and a sealing plate, which includes a sealing step for fitting the sealing plug into a pouring hole formed in a recess of a lid portion and inserting the sealing plate into the recess, and a welding step for joining the sealing plate to the recess by laser welding. In the sealing step, a heat-insulating member is provided in a minute space defined by the recess, the sealing plug and the sealing plate so as to block at least a part of the boundary portion between the sealing plate and the recess. In the welding step, welding is completed at a position where the heat-insulating member is present in the boundary portion.

Abstract: A hermetically sealed battery is provided with a sealing member for air-tightly sealing the through-hole of a battery case from the outside. The sealing member has: a covering member secured to the battery case from the outside; an insertion portion inserted into the through-hole; an annular pressure contact portion in air-tight pressure contact with the hole surrounding portion of the battery case; and a connecting portion disposed between the insertion portion and the annular pressure contact portion so as to be integral with the insertion portion and the annular pressure contact portion. The connecting portion is provided with an annular groove surrounding the insertion portion.

Abstract: A method for manufacturing a bottomed cuboid battery container includes: forming a first member by folding one piece of a first flat sheet, the first member being constructed of a quadrilateral bottom surface and first paired side surfaces, the first paired side surfaces continuing from the bottom surface and being oppose each other; and forming the bottomed cuboid battery container by welding each of a second flat sheet and a third flat sheet to the first member such that the second flat sheet and the third flat sheet oppose each other and constitute second paired side surfaces. The second flat sheet and the first member are welded from one direction. The third flat sheet and the first member are welded from one direction.

Abstract: A battery provided according to the invention includes an electrode body including a positive electrode and a negative electrode, and a battery case. A positive electrode inner terminal is connected to the positive electrode, and a negative electrode inner terminal is connected to the negative electrode. The battery includes, inside the battery case, a first film placed between the electrode body and an inner wall of the battery case, and a second film placed between the battery case and at least one of the negative electrode inner terminal and the positive electrode inner terminal. By the first film and the second film, at least one of the negative electrode inner terminal and the positive electrode inner terminal is insulated from the inner wall of the battery case, and the electrode body is insulated from the inner wall of the battery case.

Abstract: A battery sealing member: has a power generating element, a case body member, a case lid member, and an electrode terminal member having an insert-through part inserted in a through-hole provided in the case lid member. The electrode terminal member is electrically connected to the power generating element. The battery sealing member is made of a synthetic resin and has a sealing part held between the electrode terminal member and the inner surface of the case lid member. The crystallinity of the sealing part of the sealing member is higher than the crystallinity of a portion other than the seal section.

Abstract: A battery includes: an insulating plate; a connecting terminal plate; a terminal bolt that passes through the connecting terminal plate, the bolt head being between the insulating plate and the connecting terminal plate, and having a regular N-sided polygon shape, the N being an even number; and a nut. The insulating plate includes a first rotation stopping wall near an end of the insulating plate; the first rotation stopping wall includes a first a first abutting location that abuts the bolt head being rotated in a tightening direction of the nut, and a second abutting location that abuts the bolt head being rotated in a loosening direction of the nut; and a distance from the first abutting location to the first end is greater than a distance from the second abutting location to the first end.

Abstract: A battery includes a winding electrode body, a battery case provided with a liquid inlet and positive and negative terminal members. The positive terminal member has a junction part compressed in a direction orthogonal to a winding axis direction. The negative terminal member has a junction part compressed in the direction orthogonal to the winding axis direction. The liquid inlet is positioned leaning to either the positive terminal junction part or the negative terminal junction part. In the winding electrode body, a separation distance from the junction part further away from the liquid inlet to the end lying on the relevant junction side in the winding axis direction is greater than a separation distance from the junction part closer to the liquid inlet to the end on the relevant junction side in the winding axis direction.

Abstract: A sealed battery 10 is provided, which has a seam 45 between a case main body 21 and a lid 22 on an outer surface 22A side of the lid 22, and in which this seam 25 is laser welded. A terminal 40 connected to an electrode assembly in the battery 10 is led to the outside from a through hole in the lid 22 and is separated from the lid outer surface 22A by an outside resin member 60. The outside resin member 60 is constituted of a resin matrix 62, which is formed of a nonaromatic resin composition, and inorganic fibers 64 present dispersed in the resin matrix 62. At least 50% by mass of the inorganic fibers 64 in the outside resin member 60 is disposed such that the fiber axial direction of the inorganic fibers 64 is parallel to the outer surface of the lid 22.