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: In one embodiment, a method of dismantling an electricity storage device includes: preparing a battery; cutting the battery with a band saw blade; and applying a laser beam to cutting chips adhering to the band saw blade to remove the cutting chips adhering to the band saw blade.

Abstract: A method of dismantling a battery includes a cutting step, a heating step, and a removing step. In one embodiment, the cutting step cuts a case of the battery with a band saw blade made of a material having a higher melting point than a material making up the case. The heating step heats the band saw blade to a temperature that is higher than the melting point of the material making up the case and is lower than the melting point of the material making up the band saw blade. The removing step removes cutting chips adhering to the band saw blade by applying an external force to the band saw blade that is heated in the heating step.

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: Provided is a technique to break a case properly when an internal pressure of the case reaches a predetermined pressure. A herein disclosed energy storage device includes a case that is made of a first metal, includes a metallic piece that is welded to the case and that is made of a second metal being different from the first metal, and includes an intermetallic compound of the first metal and the second metal, the intermetallic compound being provided on a welded part of the case and the metallic piece.

Abstract: The present disclosure provides an electrical energy storage device including an electrode body, a case main body that includes an opening, a sealing plate that seals the opening, a welding joining part, and a shielding part that shields a gap between the welding joining part and the electrode body inside the case main body, in which in a peripheral edge of the welding joining part, a space that is surrounded by the shielding part, the case main body, and the sealing plate is secured.

Abstract: A busbar disclosed herein includes: a first metallic member including a first plate portion; a second metallic member including a second plate portion; a swaged joint formed by plastically deforming the first plate portion of the first metallic member and the second plate portion of the second metallic member such that the first plate portion and the second plate portion are swaged together; and a metal joint formed by metal-joining the first plate portion of the first metallic member to the second plate portion of the second metallic member.

Abstract: An electricity storage module 100 includes plural electricity storage devices, a restriction member 110, and a spacer 120. The plural electricity storage devices include a pair of opposed wide width surfaces 11b1, 11b2, and the wide width surfaces 11b1, 11b2 are arranged to be opposed to each other. The restriction member 110 is configured to restrict the plural electricity storage devices in a direction along which the wide width surfaces 11b1, 11b2 of plural electricity storage devices are arranged to be opposed to each other. The spacer 120 is arranged between an electricity storage device arranged at a first end part 2a in a direction along which the plural devices are arranged and the restriction member 110, and a thickness becomes smaller when a load being larger than a predetermined load is applied along the direction in which the electricity storage devices are arranged.

Abstract: In a sealed power storage device, a device case includes a resin case body with an opening and a resin lid closing the opening. The resin lid is made of electrical insulation resin. A metal terminal member is extended from inside to outside of the device case, penetrating through the resin lid. The resin lid is hermetically molded together with the metal terminal member so that the resin lid is directly joined to the outer peripheral surface of the metal terminal member without interposing another member between the resin lid and the metal terminal member.

Abstract: A method for disassembling a laminated battery includes: preparing a laminated battery including a laminate, an electrode body enclosed in the laminate, and an electrolyte enclosed in the laminate; and heating the laminated battery until at least the laminate is unsealed.

Abstract: A method for disassembling a power storage device includes: preparing a power storage device in which a positive electrode and a negative electrode are housed in a case, the negative electrode is electrically connected to the case, and the positive electrode is insulated from the case; separating a portion of the case where the case is electrically connected to the negative electrode, from the case; and cutting another portion of the case after the separating.

Abstract: A device interconnection member for connecting a first electrode terminal made of first metal in one power storage device and a second electrode terminal made of second metal in another power storage device includes a first conductive member made of the first metal and to be connected to the first electrode terminal, a second conductive member made of the second metal and to be connected to the second electrode terminal, a joint portion where a first joined portion of the first conductive member and a second joined portion of the second conductive member are joined, and a resin seal member hermetically sealing the joint portion.

Abstract: A disassembly method for a battery disclosed herein includes a removal step of removing an electrode assembly from the battery. The method also includes an immersion step of immersing at least a part of the removed electrode assembly in a liquid. The method further includes a separation step of separating the positive electrode current collector foil and the negative electrode current collector foil from each other by pulling at least one of the positive electrode current collector foil and the negative electrode current collector foil, which are immersed in the liquid, so as to displace the positive electrode current collector foil and the negative electrode current collector foil in a direction intersecting the laminating direction thereof.

Abstract: The secondary battery includes a battery case. This battery case includes a battery case main body and includes a sealing plate. This battery case main body includes a pair of wide width side surfaces that are opposed mutually, and includes a pair of narrow width side surfaces that are opposed mutually. The sealing plate includes a peripheral part and a central part that is flat. Regarding the sealing plate, an end surface of a peripheral edge of the peripheral part is joined to end surfaces of the pair of wide width side surfaces and joined to end surfaces of the pair of narrow width side surfaces. The peripheral part is bent over a whole circumference of it to make the battery outer surface side from the central part of the sealing plate toward the end surface of the peripheral edge of the peripheral part be a convex surface.

Abstract: A process of separating an electrode body includes an immersing step and an ultrasonic wave applying step. In the immersing step, the stacked electrode body is immersed in a solution containing hydrofluoric acid. Thereafter, in the ultrasonic wave applying step, an ultrasonic wave is applied to the solution. In the ultrasonic wave applying step, the ultrasonic wave is applied in a state where a positive electrode tab and a negative electrode tab of the stacked electrode body are gripped.

Abstract: To provide a technology allowing a bus bar to be mounted more strongly on an electrode external terminal using a simpler structure. An electricity storage module disclosed herein includes aligned electricity storage device, and a bus bar. The bus bar has two non-through holes formed at the same surface of the bus bar. A positive electrode external terminal of one electricity storage device of the adjacent two electricity storage devices is fitted in one non-through hole of the two non-through holes, and a negative electrode external terminal of the other electricity storage device of the adjacent two electricity storage devices is fitted in the other non-through hole of the two non-through holes. By this, the bus bar forms the electrical connection between the adjacent two electricity storage devices.

Abstract: A recovery method for recovering an electrolytic solution 15 of a lithium-ion secondary battery 10 includes an installing step S2 and a hole forming step S3. In the installing step S2, the lithium-ion secondary battery 10 is installed in a chamber 110 such that a projecting pin 161 is located immediately under a hole forming portion 42a of a case 41. In the hole forming step S3, the table 140 is lowered to pierce into the hole forming portion 42a.

Abstract: A power storage device includes a metal case with a safety valve part. The safety valve part includes a hole surrounding edge portion that forms a valve hole penetrating through the case and a valve member hermetically sealing this valve hole. The valve member includes a plate circumferential edge portion and a ring-shaped resin valve member that is made of thermoplastic resin and hermetically seals a space between the plate circumferential edge portion of the metal seal plate and the hole surrounding edge portion of the case. The safety valve part is a first safety valve part of a temperature opening type to be opened by softening or melting of the resin valve member by heat.

Abstract: A method for producing a power storage device includes an insert-molding step of making a resin member by insert-molding with respect to a terminal member inserted in an insertion hole of a lid. In this insert-molding step, the insertion hole of the lid is placed in front of a gate, and a molten resin is injected through the gate to flow in an opposite gate-side space in a cavity through the insertion hole, allowing the molten resin to spread over the entire cavity, to form the resin member.

Abstract: A lid body includes a terminal member of at least one of a positive electrode and a negative electrode, a sealing plate including an attachment hole for attaching the terminal member, and a sealing material containing a thermoplastic resin and an inorganic filler. The terminal member is inserted into the attachment hole and attached to the sealing plate in a state in which the sealing material is joined to a peripheral portion of the attachment hole. Here, as the inorganic filler, an inorganic substance having a volume change rate of 20% or less after being immersed for 7 days in a test electrolyte, which is prepared at 65° C., and which contains 1200 ppm of water and 1 M of LiPF6, and moreover in which a volume ratio of a solvent thereof satisfies a relationship of ethylene carbonate:diethyl carbonate:dimethyl carbonate=1:1:1, is used.