Abstract: A battery includes a case member, a terminal member, and a resin member. The case member has a through-hole. The resin member includes an inner portion that contacts an inner surface of the case member, an inside-hole portion that fills space between a wall of the through-hole and the terminal member, and an outer portion that contacts an outer surface of the case member and has a smaller volume than the inner portion. One of a first condition that the thermal expansion coefficient of the case member is larger than that of the inner portion and the tensile strength of the inner portion is lower than that of the outer portion and a second condition that the thermal expansion coefficient of the case member is smaller than that of the inner portion and the tensile strength of the outer portion is lower than that of the inner portion is satisfied.

Abstract: A power storage device includes a case having a case member made of metal and including a valve hole, a safety valve member made of metal and including a safety valve portion of a pressure relief type which fractures and opens when the internal pressure of the case exceeds a valve opening pressure, and a valve fixing resin member made of resin and encircling the safety valve member. The valve fixing resin member is interposed between a hole surrounding portion of the case member surrounding the valve hole and a peripheral portion of the safety valve member to be hermetically joined to these portions over the entire circumferences and fix the safety valve member to the case member.

Abstract: A power storage device includes a safety valve in a case member made of metal. The case member has a valve periphery roughened portion around the safety valve on a case inner surface The power storage device includes a blockage preventing resin protrusion that is a protrusion made of resin and protruding to the inside. The blockage preventing resin protrusion is joined to the valve periphery roughened portion and reduces the possibility of a piece of the electrode body blocking the safety valve. Nanocolumns stand numerously on the valve periphery roughened portion, and the blockage preventing resin protrusion is joined to the valve periphery roughened portion such that a resin material fills gaps between the nanocolumns standing numerously.

Abstract: A power storage device includes a case member having a terminal insertion hole, a terminal member inserted through the terminal insertion hole, and a resin member made of an insulating resin material and hermetically adhering to the case member and the terminal member to fix the terminal member to the case member while insulating the members from each other. The terminal member has an encircling band-shaped first roughened portion that has a roughened surface and surrounds the terminal member, and a second roughened portion that is spaced apart from the first roughened portion and has a roughened surface. The resin member is insert-molded integrally with the case member and the terminal member, and has an encircling band-shaped terminal seal portion that hermetically adheres to the first roughened portion, and a stress reducing portion that adheres to the second roughened portion and reduces stress generated in the terminal seal portion.

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 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 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: 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: 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 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 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 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 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: Provided is a technique of making it easier to separate a bus bar from an electrical energy storage device. An electrical energy storage module includes a plurality of electrical energy storage devices and a bus bar. The electrical energy storage devices are arranged in a first direction. The bus bar is provided to link two of the electrical energy storage devices that are adjacent to each other in the first direction. The bus bar includes a grip part. The grip part is a projection protruding from a surface of the bus bar or a penetration hole.

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 herein disclosed electrode body is a wound body in which, via a first separator 30A and a second separator 30B, a positive electrode plate 10 and a negative electrode plate 20 are wound therein. The first separator 30A is adhered to the positive electrode plate 10, but not adhered to the negative electrode plate 20. On the other hand, the second separator 30B is adhered to the negative electrode plate 20, but not adhered to the positive electrode plate 10. Then, both of a second terminal end part 30Be of the second separator 30B and a first terminal end part 30Ae of the first separator 30A are exposed to an outer surface of the wound body. In addition, a separator wound part 40s in which the first separator 30A and the second separator 30B are wound therein includes a non-adhesion area 30X where the separators are not adhered to each other.

Abstract: A method of recovering electrode materials includes: a preparing step of preparing an electrode assembly or an electrode sheet, the electrode assembly and the electrode sheet including a current collector and an electrode active material layer formed on the current collector and containing an electrode active material; a dissolving step of immersing the electrode assembly or the electrode sheet in an etchant solution that dissolves the current collector; and a separating step of separating a precipitate containing the electrode active material from the etchant solution in which the current collector is dissolved.

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.