A terminal-equipped electric wire manufacturing method includes: an electric wire installation step of inserting a core-wire exposed part between inner wall surfaces of piece parts of a core-wire connection body, the core-wire exposed part having a core-wire diameter smaller than an interval between the inner wall surfaces of the piece parts; a melting step of melting the core-wire exposed part and the core-wire connection body by emitting a laser beam to the core-wire exposed part and the core-wire connection body from a free end side of each piece part; and a fixation step of fixing the core-wire exposed part and the core-wire connection body thus melted, with the emission of the laser beam stopped.

A welding apparatus includes a welding rod; a temperature measuring jig to measure a temperature of the welding rod; and a welding rod cooler to cool the welding rod.

Example illustrations are directed to methods and apparatuses comprising battery cells having weld joints. In an example method, a laser is moved to a shoulder of a battery cell. The method may further include micro welding with the laser a first line segment on the shoulder of the battery cell and moving the laser a distance on the shoulder of the battery cell. The method may also comprise micro welding with the laser a second line segment on the shoulder of the battery cell in response to moving the laser the distance. Example battery cell assemblies, e.g., for a battery pack, may have a battery cell and a weld joint on a shoulder of the battery cell. The weld joint may include a first micro weld line segment and a second micro weld line segment separated by a distance.

A welded body manufacturing method for a welded body in which a terminal formed of a metal base material and plated with a metal material having a hardness lower than a hardness of the metal base material is connected to an end portion of a conductive member, the conductive member being connected to the terminal on a conductor welding surface of the terminal is provided. The manufacturing method includes forming at least one of a convex portion and a concave portion on the conductor welding surface and connecting the conductive member to the conductor welding surface by means of ultrasonic welding.

A battery module and a method of manufacturing the same includes: a battery cell stack including a plurality of battery cells, a bus bar frame connected to the battery cell stack, at least one electrode lead connected to the battery cell stack and containing a first metal; and a bus bar overlapping with the at least one electrode lead and containing a second metal, the at least one electrode lead and the bus bar are welded to form a welded portion, the welded portion includes a first region in which a central portion is located in the at least one electrode lead and a second region in which the central portion is located in the bus bar, and precipitates of the first metal and the second metal are distributed in both the first region and the second region.

The present invention relates to the field of 4D printing, and particularly to an electro-responsive folding and unfolding composite material for 4D printing, a method for manufacturing the same, and a method for regulating shape memory behavior thereof. In the process of layer-by-layer printing, conductive layers are embedded into a pre-designed shape memory polymer matrix through spray-coating and laser-irradiation nano-fusion welding, to manufacture a folding and unfolding structure with electro-responsive shape memory behavior. The distribution and range of heat affected zones in the electro-responsive shape memory folding and unfolding structure are controlled by adjusting the number of electric heating layers energized and the value of an energizing voltage. The speed of shape recovery and the degree of shape recovery of the structure are regulated according to a magnitude relationship between a shape recovery force F.sub.recovery and a resistance F.sub.resistance to shape recovery of the structure.

A method for producing a component for storing electrical energy, said component comprising at least one cell stack for storing electrical energy and at least one contact element for making electrical contact with the at least one cell stack, has at least the following steps: a) arranging at least part of the at least one cell stack and the at least one contact element in a defined arrangement relative to one other in, or against a chamber that can be evacuated; b) evacuating at least some of the gas in the chamber; c) connecting the at least one cell stack and the at least one contact element together to form an electrically conductive connection by means of at least one laser beam introduced into the chamber.

A wire bonding tool includes a tool body with a tubular cavity extending through the tool body and a distal end. The distal end includes a flared opening at an end of the tubular cavity. The tool body further includes at least one protrusion at a level of the distal end.

The cold pressure welding apparatus includes a first holding part capable of sandwiching a first flat conductor, a second holding part disposed opposite to the first holding part and capable of sandwiching a second flat conductor, and a drive part for moving the first holding part and the second holding part. The drive part can move the first holding part and the second holding part between a first direction separated position and a close position along a first direction. The drive part can move the first holding part and the second holding part between a second direction separated position and a sandwiching position along a second direction.

A semi-finished product for manufacturing an electrical contact element includes a first workpiece having a front side and a rear side opposite the front side, a second workpiece, and a window extending through the first workpiece. The first workpiece and the second workpiece are both metallic. The rear side of the first workpiece is closer to the second workpiece than the front side. Through the window, a surface of the second workpiece is accessible from the first workpiece. The window has a base area that, starting at the front side of the first workpiece, increases toward the second workpiece.