Abstract: An insulation holder disclosed herein is an insulating box-shaped body to house an electrode body of an electricity storage device. The insulation holder includes: a bottom face having a rectangular shape in a plan view; a pair of first side faces extending upward from the bottom face; and a pair of second side faces extending upward from the bottom face. The insulation holder is provided on its bottom side with corners. The corners are included in areas defined in the insulation holder. The areas are provided with thin portions.

Abstract: An insulation holder disclosed herein is an insulating box-shaped body to house an electrode body of an electricity storage device. The insulation holder includes: a bottom face having a rectangular shape in a plan view; a pair of first side faces extending upward from the bottom face; and a pair of second side faces extending upward from the bottom face. The insulation holder is provided on its bottom side with corners. The insulation holder is provided with grooves adjacent to the corners.

Abstract: The present disclosure provides a manufacturing method for a power storage device including a case main body, a sealing plate, an electrode body, and a film body with an insulating property. The film body includes a long side surface, and a bent part extending from the long side surface toward the sealing plate and bent so as to get close to the electrode body. A light diffusion part that diffuses laser light is provided to the bent part. This manufacturing method includes a preparing step of preparing the film body, an accommodating step of accommodating the electrode body and the film body in the case main body, and a laser welding step of welding an outer peripheral part of the sealing plate to an inner peripheral part of an opening of the case main body by laser.

Abstract: In a battery case sealing method, a lid is fitted to an opening of a battery case, and then a side wall on an inner side of the battery case and a side surface of the lid are brought into contact with each other. The side wall forms the opening. In a state where the side wall on the inner side of the battery case is in contact with the side surface of the lid, a boundary portion between the side wall and the side surface of the lid is welded by irradiating a laser beam in a direction from an outer side of the battery case toward the inner side of the battery case in a thickness direction of the lid.

Abstract: A manufacturing method includes the steps of: preparing a battery case having an opening; fabricating an assembly by inserting a wound electrode body and a lid which includes a terminal connected to the wound electrode body and which closes the opening into the battery case; sandwiching the battery case by a pressing jig in a state where the opening faces downward to close a gap between the battery case and the lid; disposing the assembly so that the terminal faces upward by inverting the assembly in a state where the battery case is sandwiched by the pressing jig; and welding the lid and the battery case to each other in a state where the terminal faces upward and the battery case is sandwiched by the pressing jig.

Abstract: A manufacturing method includes the steps of: preparing a battery case having an opening; fabricating an assembly by inserting a wound electrode body and a lid which includes a terminal connected to the wound electrode body and which closes the opening into the battery case; sandwiching the battery case by a pressing jig in a state where the opening faces downward to close a gap between the battery case and the lid; disposing the assembly so that the terminal faces upward by inverting the assembly in a state where the battery case is sandwiched by the pressing jig; and welding the lid and the battery case to each other in a state where the terminal faces upward and the battery case is sandwiched by the pressing jig.

Abstract: A manufacturing method includes the steps of: preparing a battery case having an opening; fabricating an assembly by inserting a wound electrode body and a lid which includes a terminal connected to the wound electrode body and which closes the opening into the battery case; sandwiching the battery case by a pressing jig in a state where the opening faces downward to close a gap between the battery case and the lid; disposing the assembly so that the terminal faces upward by inverting the assembly in a state where the battery case is sandwiched by the pressing jig; and welding the lid and the battery case to each other in a state where the terminal faces upward and the battery case is sandwiched by the pressing jig.

Abstract: A manufacturing method includes the steps of: preparing a battery case having an opening; fabricating an assembly by inserting a wound electrode body and a lid which includes a terminal connected to the wound electrode body and which closes the opening into the battery case; sandwiching the battery case by a pressing jig in a state where the opening faces downward to close a gap between the battery case and the lid; disposing the assembly so that the terminal faces upward by inverting the assembly in a state where the battery case is sandwiched by the pressing jig; and welding the lid and the battery case to each other in a state where the terminal faces upward and the battery case is sandwiched by the pressing jig.

Abstract: In a battery case sealing method, a lid is fitted to an opening of a battery case, and then a side wall on an inner side of the battery case and a side surface of the lid are brought into contact with each other. The side wall forms the opening. In a state where the side wall on the inner side of the battery case is in contact with the side surface of the lid, a boundary portion between the side wall and the side surface of the lid is welded by irradiating a laser beam in a direction from an outer side of the battery case toward the inner side of the battery case in a thickness direction of the lid.

Abstract: Provided is a laser beam machining apparatus (1) which enables prevention of a reduction in the transmittance of a protection glass (32) caused by adhesion of high-temperature foreign substances such as spatters and fumes generated in laser beam machining to thereby increase the useful life of the protection glass (32). The laser beam machining apparatus (1) performs machining by melting the surface of a workpiece (2) by irradiating the surface of the workpiece (2) with a laser beam. The laser machining apparatus is provided with a condenser lens (31) for condensing the laser beam onto the surface of the workpiece (2), the protection glass (32) for protecting the condenser lens (31), which is disposed on the workpiece (2) side of the condenser lens (31), a torch (34) for emitting the laser beam, which is disposed facing the workpiece (2), and an assist gas feeding unit (40) (cooling means) for cooling the protection glass (32).