Abstract: A power storage device includes a rectangular box-shaped case and an electrode body housed therein. An opening peripheral portion of a case body of the case is bent to the inside of the opening. A lid peripheral portion of the lid member is bent on an inner surface side. The lid peripheral portion and the opening peripheral portion are hermetically jointed together while the lid peripheral portion stacked on the opening peripheral portion on the outside in its thickness direction over a ring-band shaped range. An electrode laminated portion of the electrode body is elastically compressed in an electrode-body thickness direction by a first main wall portion and a second main wall portion of the case having the elasticity.

Abstract: A power storage device is provided with a case and an electrode body housed in the case. The case includes a bottomed prismatic shaped case body with an opening, and a plate-shaped lid member closing the opening. The case body includes an opening peripheral portion that is bent to the inside of the opening over the entire circumference. The lid member includes a lid peripheral portion that is bent toward an inner surface over the entire circumference. While the lid peripheral portion is stacked, over a ring-band shaped range, on the opening peripheral portion on the outside in the thickness direction, the lid peripheral portion and the opening peripheral portion are hermetically joined to each other.

Abstract: Provided is a technique for improving impregnation efficiency of an electrolyte solution into a wound electrode body. A method for manufacturing an electricity storage device is disclosed herein. The electricity storage device includes an electrode body, a case, and an electrolyte solution. The case includes a body having a wide rectangular first wall and an opening opposed to the first wall, and a sealing plate that seals the opening and is opposed to the first wall. This method includes an accommodating step, an injecting step, and a sealing step. In the accommodating step, the electrode body is accommodated in the body to make the wide surfaces opposed to the first wall. In the injecting step, the electrolyte solution is injected into the body after the accommodating step. In the sealing step, the opening of the body is sealed with the sealing plate after the injecting 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: The electric storage device of the present disclosure includes a case including an exterior package having a first surface formed in a wide width rectangular shape, having a pair of opposed second surfaces, having a pair of opposed third surfaces, and having an opening, and including a sealing plate configured to seal the opening and formed in a wide width rectangular shape. A positive electrode and a negative electrode include plural tabs protruding at one of end parts in a winding axis direction of the electrode body, and include a penetration hole at one surface of the second surface, a terminal is inserted into a penetration hole, wide width surfaces of the electrode body respectively face the sealing plate and the first surface, the tab is arranged inside the case to face the second surface, and a metal joint configured to connect the terminal and the tab is provided.

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: A power storage device includes a case provided with a bottomed rectangular cylindrical case body constituting a second primary wall portion and four side wall portions and a rectangular lid constituting a first primary wall portion. The first primary wall portion and the second primary wall portion are to elastically compress an electrode laminated portion of an electrode body. There are provided a plurality of bent ridge portions extending toward an upper side at an axial inner side, being bent, and further extending toward an axial outer side to press the electrode laminated portion so that an impregnated electrolytic solution is restricted from moving to lower portions of both end portions of the electrode laminated portion.

Abstract: A power storage device is provided with a parallelepiped box-like case and an electrode body housed in the case. The case includes a bottomed rectangular cylindrical case body having a rectangular opening and forming a second primary wall portion and four side wall portions, and a rectangular lid forming a first primary wall portion, in which a lid peripheral edge portion is joined to an opening peripheral edge portion of the opening of the case body over an entire circumference. The first primary wall portion and the second primary wall portion of the case elastically compress an electrode laminated portion of the electrode body in an electrode body thickness direction.

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 battery includes: an outer casing accommodating a power generating element; and a terminal member connected thereto and having a terminal surface exposed outside the outer casing. The battery further includes a conductive closing member formed with a through hole for the terminal member, and an insulating sealing resin member closing a gap between the closing member and the terminal member over the entire perimeter of the through hole. The outer surface of the sealing resin member outside the closing member is defined by an outward-facing portion connected to the terminal member and a sloped portion continuous with and more steeply sloped than the outward-facing portion to have a height from an outer surface of the closing member, smaller toward a farther side from the terminal member. Those outward-facing portion and sloped portion are provided outside an outer edge of the terminal surface over the entire perimeter thereof.

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.

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 method for producing a power storage device includes an insert-molding step in which a resin member is formed by insert molding with a terminal member inserted in an insertion hole of a case member. This insert-molding step is performed using a molding mold that includes a top-surface contact portion which is to face and tightly contact with a terminal top surface of the terminal member, an inner annular flat portion and an outer annular flat portion to form a frame top surface of the resin member, and an annular protruding portion to form an annular groove of the resin member.

Abstract: A method for producing a power storage device includes a process of insert-molding. This process is to relatively move a first mold and a second mold to press a terminal top surface of a terminal member by a top-face close-contact portion of the first mold to a second-mold side and to press a to-be-contacted portion of the terminal member by a contact portion of the second mold to a first-mold side so that a deformed portion of the terminal member is elastically deformed. A resin member is thus insert-molded while the terminal top surface is pressed and tightly contacted with the top-face contact portion.

Abstract: A method for manufacturing a battery herein disclosed includes the steps of: preparing a swaging device including a die having a seating part, a plurality of fixing parts dividedly arranged on the outer circumferential side in the radial direction of the seating part, and a plurality of movable parts respectively arranged between the plurality of fixing parts, and movable toward the outer circumferential side in the radial direction, and a punch to be press-fitted to the seating part of the die; and stacking the first metallic plate, the metal foil lamination part and the second metallic plat on the die, press-fitting the punch to the seating part of the die, and respectively moving the plurality of movable parts toward the outer circumferential side in the radial direction.

Abstract: A method for producing a power storage device includes closing an opening portion of a case body with a lid of a lid assembly, and laser-welding the opening portion of the case body and a peripheral portion of the lid over their entire circumference. A resin member has an outer surface including a scattered light-reached surface to which scattered light of a laser beam directly reaches, at least a part of the scattered light-reached surface including a smoothed region having a surface roughness of 0.6 ?m or less.

Abstract: A method for producing a power storage device includes placing a lid assembly that includes a lid and a terminal member integrated therewith via a resin member to close an opening portion of a case body with the lid, and laser-welding the opening portion of the case body and the peripheral portion of the lid over an entire circumference. In placing the lid assembly, a peripheral high-level region, in which a peripheral outer surface of the peripheral portion of the lid is located on the outer side relative to an opening end surface of the opening portion of the case body is provided in proximate long-side opening portions, close of the opening portion and proximate long-side peripheral portions of the peripheral portion.

Abstract: A method for producing a power storage device includes forming a lid, forming a lid assembly, closing, and welding. In forming a lid, there is included forming, by forging, a protruding portion between a peripheral portion and an insertion-hole surrounding portion of the lid to block scattered light of a laser beam from being irradiated to a resin member, with a distance D from an end surface of the peripheral portion to a side surface of the protruding portion falling within 0.5t (D?0.5t) relative to a thickness t of the lid.