Abstract: The present disclosure enables a decline in a joining force between an internal terminal and an external terminal to be suppressed even when a load is applied to a sealed battery from the outside. In a sealed battery disclosed herein, an external terminal includes a plate portion and a flange portion. The plate portion has a rectangular shape and includes an internal terminal joining portion that is joined to the internal terminal at one end of the plate portion in a lengthwise direction and an external device joining portion that is joined to an external device at another end of the plate portion in the lengthwise direction. The flange portion is arranged in at least one side edge portion of the plate portion in a transverse direction so as to rise approximately perpendicularly with respect to the plate portion.

Abstract: The present disclosure enables a decline in a joining force between an internal terminal and an external terminal to be suppressed even when a load is applied to a sealed battery from the outside. In a sealed battery disclosed herein, an external terminal includes a plate portion and a flange portion. The plate portion has a rectangular shape and includes an internal terminal joining portion that is joined to the internal terminal at one end of the plate portion in a lengthwise direction and an external device joining portion that is joined to an external device at another end of the plate portion in the lengthwise direction. The flange portion is arranged in at least one side edge portion of the plate portion in a transverse direction so as to rise approximately perpendicularly with respect to the plate portion.

Abstract: A manufacturing method for the secondary battery includes a first preparation step for inserting a terminal formed in an oval like shape and having a cylindrical shaft part into an attachment hole formed on a sealing plate of the secondary battery, a second preparation step for arranging a conductive member on a surface at a side where the shaft part of the sealing plate protrudes, a first caulking step for using a caulking tool that includes a tip end part formed in an oval like shape and includes a base end part formed in a complete round shape whose diameter is larger than the tip end part, to insert the tip end part into the shaft part, so as to make the base end part expand an inner diameter of the shaft part, and a second caulking step for pressing an expanded portion of the shaft part to be flat.

Abstract: A battery includes: a conductive member provided with a through hole; and a terminal member inserted in the through hole and having a tip portion exposed on the conductive member. A joined portion of the tip portion of the terminal member to the conductive member is formed. The joined portion includes a thick portion at which a thickness of the terminal member is relatively thick, and a thin portion at which the thickness of the terminal member is relatively thin.

Abstract: A layered portion is formed by layering an electrode core body. The layered portion has a first outer surface and a second outer surface opposite to each other. The first outer surface of the layered portion is connected to a current collector that is in a form of a plate. A first protrusion/recess region is formed in the second outer surface of the layered portion. A second protrusion/recess region is formed in an outer surface of the current collector located opposite to the layered portion. A width of the second protrusion/recess region is 1.3 times or more and 2.0 times or less as large as a width of the first protrusion/recess region. A curved portion is formed at a portion at which the layered portion and the current collector are connected to each other.

Abstract: A collector terminal that electrically connects an external terminal at least part of which is disposed on an outer side of a battery case and an electrode body accommodated on an inner side of the battery case, includes a base portion that is attached to the external terminal, and a lead portion that extends from the base portion and is joined to the electrode body. A recessed portion is provided at a foot part of the lead portion at a boundary portion between the base portion and the lead portion so as to extend along a width direction orthogonal to an extending direction of the lead portion. A slit is provided at a portion adjacent to the recessed portion in the width direction so as to extend inward in the base portion.

Abstract: The present disclosure enables a decline in a joining force between an internal terminal and an external terminal to be suppressed even when a load is applied to a sealed battery from the outside. In a sealed battery disclosed herein, an external terminal includes a plate portion and a flange portion. The plate portion has a rectangular shape and includes an internal terminal joining portion that is joined to the internal terminal at one end of the plate portion in a lengthwise direction and an external device joining portion that is joined to an external device at another end of the plate portion in the lengthwise direction. The flange portion is arranged in at least one side edge portion of the plate portion in a transverse direction so as to rise approximately perpendicularly with respect to the plate portion.