Abstract: A power storage cell comprises an electrode assembly, a collector plate that has the first electrode sheet connected thereto, and a laminate film, wherein the collector plate has a peripheral edge portion including an inner side located closer to the electrode assembly and an outer side located on a side opposite to the electrode assembly with respect to the inner side, the collector plate is provided with a welding portion and an adhesive portion, and when a direction from the inner side toward the outer side is defined as a first direction and a direction intersecting the first direction is defined as a second direction, the welding portion and the adhesive portion are aligned in the second direction.

Abstract: A power storage cell comprises an electrode assembly that is composed of a first electrode sheet, a separator and a second electrode sheet stacked in layers, a collector plate that is disposed adjacent to the electrode assembly and has the first electrode sheet connected thereto, and a laminate film that seals the electrode assembly and the collector plate inside, wherein a portion of the laminate film that is located on a major surface of the collector plate has at least one exposure hole that exposes a portion of the collector plate.

Abstract: A power storage device includes a power storage module, an accommodation case, a first plate portion, and a second plate portion. The first plate portion is provided with a first protrusion and a second protrusion. The first protrusion and the second protrusion are formed to extend in a first intersecting direction intersecting with the stacking direction. The second plate portion is provided with a third protrusion and a fourth protrusion. The third protrusion and the fourth protrusion are formed to extend in a second intersecting direction intersecting with the stacking direction and the first intersecting direction.

Abstract: A power storage device includes: a power storage module including power storage cells; an accommodation case; and a plate portion. Each of the power storage cells includes: an exterior body; and an electrode assembly and an electrolyte solution that are accommodated in the exterior body. The plate portion includes a fixed section and a corrugated plate portion. In a plan view of the plate portion as seen from a position away from the plate portion in the stacking direction, the corrugated plate portion is formed to deform so as to extend toward a central point of the electrode assembly when the corrugated plate portion receives pressing force applied in the stacking direction.

Abstract: A power storage device includes power storage cells and a bus bar. Each power storage cell includes positive-electrode sheets, negative-electrode sheets, a positive-electrode current collector plate, a negative-electrode current collector plate, and a laminated film. The positive-electrode current collector plate includes a positive-electrode protrusion shaped to protrude from the laminated film, and the negative-electrode current collector plate includes a negative-electrode protrusion shaped to protrude from the laminated film. The power storage cells are stacked such that the positive electrode protrusion in one power storage cell and the negative-electrode protrusion in another power storage cell adjacent to the one power storage cell face each other in the one direction. The bus bar is shaped to extend in the one direction and connects the positive-electrode protrusion to the negative-electrode protrusion.

Abstract: A power storage cell comprises an electrode assembly, a collector plate that has the first electrode sheet connected thereto, and a laminate film, wherein the collector plate has a peripheral edge portion including an inner side located closer to the electrode assembly and an outer side located on a side opposite to the electrode assembly with respect to the inner side, the collector plate is provided with a welding portion and an adhesive portion, and when a direction from the inner side toward the outer side is defined as a first direction and a direction intersecting the first direction is defined as a second direction, the welding portion and the adhesive portion are aligned in the second direction.

Abstract: Provided is a method capable of producing, with excellent operability, a laminated electrode assembly which is stably restrained. The method for producing a laminated electrode assembly disclosed herein includes a step of preparing a laminate in which a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately laminated, and a separator is interposed between each positive electrode sheet and each negative electrode sheet; a step of enveloping, with a heat shrinkable film, four faces of the laminate including a pair of main faces perpendicular to a lamination direction of the laminate and facing each other, and a pair of end faces parallel to the lamination direction of the laminate and facing each other; and a step of heating the pair of end faces while sandwiching the pair of main faces with a cooling plate to thermally shrink the heat shrinkable film on the pair of end faces.

Abstract: A battery module includes a secondary battery, temperature detection unit that detects temperature information about the secondary battery, and a control device that controls charging and discharging of the secondary battery on the basis of the temperature information detected by the temperature detection unit. In the battery module, a level difference (recess) is provided on the surface of at least one of the secondary battery and the temperature sensor such that a space is formed at least at a central portion of a contact region at which the temperature sensor of the temperature detection unit and the secondary battery come into contact with each other. As a result, a space in which foreign matter can be accommodated can be formed, and accordingly the temperature information about the secondary battery can be detected with high precision by suitably bringing the temperature sensor and the secondary battery into contact with each other.

Abstract: A sealed cell according to the present invention includes an angular case 50 that accommodates an electrode body. The angular case 50 includes a concave case main body 52, having an opening, and a sealing member 54. The case main body 52 has a flat surface 52a opposed to the sealing member 54, with the electrode body interposed therebetween, and a side wall 52b rising from the flat surface 52a. The peripheral edge portion of the opening provided in the case main body 52 and the sealing member 54 are joined to each other by seal welding. Concave and convex portions including concave portions 56a, 156a recessed toward the inside of the case and convex portions 56b flush with the flat surface 52a are formed on at least one side 58a portion of end sides of the flat surface 52a. Electrode terminals 80, 82 are disposed on bottom surfaces of the concave portions 56a, 156a.

Abstract: A sealed battery disclosed here comprises an electrode body comprising a positive electrode collector and a negative electrode collector, collector tabs for external connection bonded to the corresponding collector, and a case. Both of bonded portions of the positive and the negative electrode collectors and the positive and negative electrode collector tabs are in the case. At least one of the positive and the negative electrode collectors and the collector tab bonded to the corresponding electrode are made of metals different from each other. An intermetallic compound present at a bonded interface between the collector and the connector tab and is made of the metals different from each other has a maximum diameter of smaller than 1 ?m under a transmission electron microscope observation.

Abstract: A secondary battery includes: an electrode body including an electrode main body, a collector foil protrusion section, and a collector foil connection portion; a first collector terminal including a first extension part that is welded to the collector foil connection portion; and a second collector terminal that is a member separate from the first collector terminal and includes a second extension part welded to the collector foil connection portion. The first extension part and the second extension part are located on the opposite sides of the collector foil connection portion. The secondary battery includes a welded joint at which both the first extension part and the second extension part are welded to the collector foil connection portion such that the first extension part, the second extension part, and the collector foil connection portion are united. The first collector terminal and the second collector terminal are united through the welded joint.

Abstract: A secondary battery is provided, which includes a laminated electrode body and which has a current-collecting structure with favorable structural stability even when mounted to a vehicle and with superior high-rate charge-discharge characteristics.

Abstract: A secondary battery employs a stacked electrode assembly. A current collector terminal includes a base plate portion and a current collector plate portion being continuous with the base plate portion and extending along a direction orthogonal to the base plate portion. The current collector plate portion includes a plurality of slits extending from a tip end of the current collector plate portion along a direction orthogonal to the base plate portion. A cut-out is formed in at least one of an edge of the plurality of slits and an edge of the current collector plate portion extending along a direction orthogonal to the base plate portion.

Abstract: A secondary battery includes a stacked electrode assembly in which a plurality of positive electrode sheets and a plurality of negative electrode sheets are stacked. Current collector terminals include current collector plate portions each extending along a plane orthogonal to exposed portions of the positive electrode sheets and exposed portions of the negative electrode sheets. Each of base plate portions is continuous with the current collector plate portion and extends along one side of the electrode assembly that is orthogonal to one side thereof from which the exposed portions protrude. Each of the current collector plate portions includes a plurality of slits extending from a tip end of the current collector plate portion along a direction orthogonal to the base plate portion, and extending into a curved portion. The exposed portions are inserted in the slits of the current collector terminals.

Abstract: A battery pack is a battery pack that is configured by arranging plural chargeable-dischargeable single cells in a specified direction. Each of the plural single cells includes: an electrode body including a positive electrode and a negative electrode; and a box-shaped battery case accommodating the electrode body and an electrolyte. The two adjacent single cells in the battery pack are provided with gas discharge valves in mutually opposing surfaces of the battery cases, each of the gas discharge valves discharging gas that is produced in the battery case. In the battery cases provided in the two adjacent single cells, the gas discharge valves that are provided in the mutually opposing surfaces are disposed at positions that do not overlap each other when seen in an arrangement direction of the single cells.

Abstract: A secondary battery includes a rolled electrode body, a case main body that has a shape of an open cylinder with a bottom; a case cover, a first electrode terminal, and a second electrode terminal. The first electrode terminal and the second electrode terminal support the rolled electrode body. The first electrode terminal is fixed to the case cover, with one end being exposed to the outside of the case main body, and the other end being connected to a first collector portion. The second electrode terminal is fixed, together with the negative-electrode electrode terminal, to the case cover, with one end being exposed to the outside of the case main body, and the other end being connected to a second collector portion.

Abstract: A battery module includes a secondary battery, temperature detection unit that detects temperature information about the secondary battery, and a control device that controls charging and discharging of the secondary battery on the basis of the temperature information detected by the temperature detection unit. In the battery module, a level difference (recess) is provided on the surface of at least one of the secondary battery and the temperature sensor such that a space is formed at least at a central portion of a contact region at which the temperature sensor of the temperature detection unit and the secondary battery come into contact with each other. As a result, a space in which foreign matter can be accommodated can be formed, and accordingly the temperature information about the secondary battery can be detected with high precision by suitably bringing the temperature sensor and the secondary battery into contact with each other.

Abstract: The battery according to the present invention includes electrodes provided with current collecting tabs 26 and 36, an electrode body 10 constituted by repeatedly laminating the electrodes in the direction of lamination, and tab groups 28 and 38 obtained by overlaying repeatedly laminated electrode tabs 26 in the direction of lamination. First tabs 26 and 36 included in the tab groups 28 and 38 have extending parts 26a and 36a which extend from an active material layer, and crossing parts 26b and 36b which extend in a direction perpendicular to, or intersecting at an acute angle with, the direction of extension A of the extending parts 26a and 36a. The crossing parts 26b and 36b are gathered together in the direction of lamination, and current collector terminals 70 and 72 are joined to the positions at which the crossing parts are gathered together.

Abstract: A manufacturing method for a secondary battery according to the invention includes an assembling step in which an insulating member having an insulating property is assembled to an electrode body, the insulating member having a first inclined portion and a second inclined portion provided so as to face each other in one end of the insulating member, as well as a gap provided between the first inclined portion and the second inclined portion. In the first inclined portion and the second inclined portion, inclined surfaces are formed on surfaces of the first inclined portion and the second inclined portion on sides facing each other, and are inclined in a direction in which the first inclined portion and the second inclined portion are separated from each other as the first inclined portion and the second inclined portion extend to tip sides.

Abstract: A secondary battery employs a stacked electrode assembly. A current collector terminal includes a base plate portion and a current collector plate portion being continuous with the base plate portion and extending along a direction orthogonal to the base plate portion. The current collector plate portion includes a plurality of slits extending from a tip end of the current collector plate portion along a direction orthogonal to the base plate portion. A cut-out is formed in at least one of an edge of the plurality of slits and an edge of the current collector plate portion extending along a direction orthogonal to the base plate portion.