Abstract: A power storage device includes a case member, a terminal member, and a resin member that fixes the terminal member to the case member. At least one of a case seal portion and a terminal seal portion has a plurality of first seal portions each of which extends continuously over the entire periphery in a circumferential direction and is subjected to cohesive failure when a joint with the resin member breaks down, and a second seal portion that is disposed between the first seal portions adjacent to each other, extends continuously over the entire periphery in the circumferential direction, and is subjected to interfacial failure when a joint with the resin member breaks down.

Abstract: A metal-resin joint includes a metal member having a continuous band-shaped resin joined portion on a metal surface, and a resin member joined and fixed to the resin joined portion over the entire periphery in a circumferential direction. The resin joined portion has a continuous band-shaped recess arranged portion in which numerous bowl-shaped recesses are arranged while partially overlapping, and the recess arranged portion includes a continuous band-shaped nano-roughened portion on which high nanocolumns stand numerously, and a non-nano-roughened portion. The resin member is joined to the nano-roughened portion over the entire periphery with a resin material filling gaps between the high nanocolumns standing numerously on the nano-roughened portion.

Abstract: A power storage device includes a case lid member, a terminal member, and a resin member. The resin member includes a resin outer portion, a resin inner portion, and a resin inside-hole portion. The case lid member and the resin member are configured that, when the power storage device is placed under a temperature environment of ?40° C., the resin member forms an outward convex warp in a lid thickness direction with respect to a lid longitudinal direction so that a pair of longitudinal joint faces of the resin inner portion press the terminal member in the lid longitudinal direction.

Abstract: A power storage device includes a case lid with a terminal inserting hole, a current collecting terminal having a hole insertion portion inserted in the terminal inserting hole and an external connection portion placed on a front surface side of the case lid, and an insulating resin member integrally molded with the current collecting terminal and the case lid. The insulating resin member includes an outer-periphery-side insulating resin portion and a back-surface side insulating resin portion connecting the current collecting terminal and the case lid. The back-surface side insulating resin portion is formed with a hollow portion penetrating through a back surface of the back-surface side insulating resin portion to a back surface of the outer connecting portion. The back surface of the outer connecting portion is formed with an annular band-shaped sealing portion along the outer edge portion of the hollow portion.

Abstract: A power storage device includes a case lid with a terminal inserting hole, a current collecting terminal having a hole insertion portion inserted in the terminal inserting hole in a case front-back direction and an external connection portion continuous with the hole insertion portion and placed in parallel to the case lid on the case front-surface side, and an insulating resin member integrally molded with the current collecting terminal and the case lid to connect the hole insertion portion and the external connection portion to a hole outer edge portion and a hole surrounding portion. The insulating resin member includes a back-surface side insulating resin portion connecting a back surface of the external connection portion and the hole insertion portion to the hole outer edge portion and the hole surrounding portion. The back-surface side insulating resin portion is formed with a recessed portion opening on a case back-surface side.

Abstract: Provided is a lid body including: a terminal member being mainly made up of a first metal; a sealing plate mainly made up of a second metal; and a sealing material. The sealing plate has a mounting hole for attaching the terminal member. The terminal member is inserted into the mounting hole and is attached to the sealing plate in a state where the sealing material is joined to a peripheral edge portion of the mounting hole. With as ?S a coefficient of linear expansion at 25° C. of the sealing material, ?1 as a coefficient of linear expansion at 25° C. of the first metal and ?2 as a coefficient of linear expansion at 25° C. of the second metal, ?L??S??H is satisfied, where ?H is the higher value and ?L is the lower value from among the ?1 and ?2.

Abstract: In a battery, a lid member of a battery case is provided with a terminal part and a resin member. The terminal part has a terminal plate-shaped portion located inside the battery case, which extends wider than a through hole along an inner surface of the lid member. The resin member has an inner resin plate-shaped portion located between the inner surface of the lid member and the terminal plate-shaped portion. The lid member, on the inner surface side around the through hole, includes a protruding portion defined by a protruding inner surface joined to the inner resin plate-shaped portion and protruding toward the inside of the battery case relative to a non-protruding inner surface farther from the through hole than the protruding inner surface. Side surfaces of the protruding portion and the terminal plate-shaped portion do not project outward beyond a side surface of the inner resin plate-shaped portion.

Abstract: A method of manufacturing a power storage device includes a laser welding step in which a laser beam is irradiated to an opening portion of a case body and a peripheral portion of a case lid member of a lid assembly over the entire circumference to laser weld them while the opening portion of the case body is closed by the case lid member, a shielding step, prior to the laser welding step, in which a shield member is placed in position on the lid assembly to prevent scattered light of the laser beam from reaching a resin member, and a removing step, after the laser welding step, in which the shield member is removed.

Abstract: A power storage device has a case member, a first terminal member, a second terminal member, a first resin member hermetically joined to the case member and the first terminal member, and a second resin member hermetically joined to the case member and the second terminal member. The first resin member is made of a first resin material having a resin material linear expansion coefficient ? within the range of 1.6×10?5 to 2.7×10?5 (1/K), and the second resin member is made of a second resin material that is different from the first resin material and has a resin material flexural modulus E of 17 GPa or less.

Abstract: A power storage device includes a current collecting terminal, a case member having a terminal insertion hole, and an insulating resin member connecting the current collecting terminal with a hole periphery and a hole surrounding portion of the terminal insertion hole. The current collecting terminal and the case member have seal portions that ensure airtightness in a case, at connecting portions connecting with the insulating resin member, and each of the seal portions is a roughened surface. The insulating resin member has a thermoplastic resin material including high molecular weight particles with a molecular weight of 10,000 or more and low molecular weight particles with a molecular weight of 500 to 5,000, and the low molecular weight particles are included 5 to 15% by weight in the thermoplastic resin material and are unevenly distributed closer to the roughened surface.

Abstract: A power storage device has a case member, a terminal member, and a resin member subjected to insert molding to fix the terminal member to the case member. The resin member is made of a resin material including a thermoplastic main resin having a first glass transition temperature equal to or higher than 70° C., a thermoplastic elastomer, and a filler. The elastomer has a second glass transition temperature that is equal to or higher than ?10° C. and equal to or lower than 20° C. and a third glass transition temperature equal to or lower than ?40° C.

Abstract: A metal member (a lid member and a positive terminal member) has a surface with a joining region to be joined to a resin member (a positive-electrode resin member) to seal between the first space and the second space (outside and inside of a battery) in combination with the resin member. The joining region includes a roughened region formed on the surface and constituted of a base layer composed of accumulated debris particles, and a column group layer composed of nano columnar bodies standing densely in two dimensions, each being formed of the debris particles bonding to one another like strings of beads extending in the height direction from the base layer. The nano columnar bodies in the resin member have an average height of 84 nm or more.

Abstract: A battery is a lithium-ion battery including a case, an electrode body and an electrolytic solution which are housed inside the case, and a resin member fixed to the case and having an inner exposed surface which is exposed inside the case. The electrolytic solution is a non-aqueous electrolytic solution containing fluorine. The resin member includes glass filler formed of glass which contains silicon oxide as a main body and added with group 2 elements. A number of atoms ratio of the group 2 elements to silicon in component elements of the glass filler is 0.12% or more and 65% or less.

Abstract: In an aluminum member, a member body made of metal aluminum (a lid member and a positive terminal member) is formed, on its member surface, with protrusions (a lid upper-surface protrusion layer, a lid lower-surface protrusion layer, a terminal side-surface protrusion layer, a terminal lower-surface protrusion layer) having a nano-order diameter of less than 1 ?m and a nano-order height of less than 1 ?m, which are densely arranged. Proximal end portions of the protrusions, continuous to the member surface, contains amorphous alumina and ?-alumina.

Abstract: A battery includes a unit member in which a positive-electrode resin member made of resin is joined to each of a lid and a positive terminal member, which are made of metal. The lid and the positive terminal member are formed, on respective surfaces, with protrusions that have an average diameter of less than 1 ?m on a nano-order and are arranged in a densely reticulated arrangement. The resin forming the positive-electrode resin member intrudes into each gap between at least distal ends of the adjacent protrusions, so that the positive-electrode resin member is joined to at least the distal ends of the protrusions.

Abstract: A battery lid includes an aluminum lid member, a first terminal member made of aluminum and a second terminal member made of copper, each extending to both a front side and a back side, and resin members fixing the terminal members to the lid member. Of the second terminal member, an opposite surface that faces a wall surface between the front side and the back side of the lid member via the resin member is formed with asperities, in which the resin member bites to form a minute anchor structure. The resin member is made of a base resin mixed with fillers and prepared so that its linear expansion coefficient in a range of 80% to 120% of a linear expansion coefficient of the aluminum.

Abstract: The manufacture method disclosed herein is a method for manufacturing an electrical storage device, including a step of preparing an outer case in which a peripheral part of an opening is a flat surface, and a lid assembly obtained by integral molding of a lid, a terminal member and an insulating member, a step of attaching the lid assembly to the opening of the outer case, and a step of irradiating the boundary of the peripheral part and an outer edge part with laser light. The lid assembly is placed so that an inclined part will become thinner from the outer surface toward the boundary with the outer case, and the outer surface of the lid is placed at a higher place than the peripheral part of the opening, and the inner surface of the lid is placed at a lower place than the peripheral part of the opening.

Abstract: A power storage device includes a case having a metal lid with an insertion hole, a terminal member inserted through the insertion hole, and a resin member insulating between the case and the terminal member. The terminal member is made of a flat plate-shaped metal member bent to form an inner terminal part and an outer terminal part including a connection flat surface. The outer terminal part includes an outer main portion extending from an area joined to the inner terminal part to one side in a thickness direction of the inner terminal part, forming over half of the connection flat surface, and an outer protruding portion protruding on the other side in the thickness direction, forming the rest of the connection flat surface. The terminal member has a T-shaped cross-section at a portion including the joined area of the inner and outer terminal parts.

Abstract: A power storage device includes a case having a metal lid with an insertion hole, a terminal member inserted through the insertion hole, and a resin member insulating between the case and the terminal member. The lid has a surface facing outside, including a ring-shaped hole-surrounding region around the insertion hole, to which the resin member is airtightly firmly fixed, and an outer region contacting the resin member. A two-region consisting of two, the hole-surrounding region and the outer region, has a two-region length at a two-region length ratio of 3.0 or more, which is the ratio of the maximum two-region length to the minimum two-region length, and a seal length of 1.4 or less, which is the ratio of the maximum seal length to the minimum seal length of the hole-surrounding region.

Abstract: A power storage device includes a case member, a terminal member inserted in an insertion hole of the case member, and a resin member joined to the case member and the terminal member. The resin member includes, on a resin outer surface exposed on an outer side of the case member, at least any one of a recess and a projection portion increasing a creepage distance from a terminal outer surface, which is exposed on the outer side of the case member, of the terminal member to a case outer surface exposed on the outer side of the case member.