A welding method according to the present invention is a welding method for irradiating an object to be welded including a plurality of metallic plates that are stacked on each other with a high energy beam and performing welding. The welding method includes: forming a plurality of tack weld nuggets along a virtual closed curve on a part to be welded of the object to be welded; and forming a plurality of main weld nuggets so that the main weld nuggets overlap the plurality of respective tack weld nuggets.

A heat pipe and a sealing method thereof; the sealing method for a heat pipe includes the steps of: providing a metal pipe member, the metal pipe member including one end having a sealed end portion formed thereon and another end thereof having a narrowing neck section extended therefrom. The narrowing neck section includes a channel. A compression mold compresses the narrowing neck section and moves away from the metal pipe member in order to compress and elongate the narrowing neck section into a compression elongated column and to seal the channel. Finally, spot welding process is performed on the compression elongated column to form a sealed block thereon. The present invention is of the merits of improved work efficiency for heat pipe bending, compression and testing and increased length of the metal pipe member with enhanced thermal transfer performance of the heat pipe.

In some examples, a technique including positioning supports such that the supports are between a first metallic substrate and a second metallic substrate, wherein an undulating member is located between the first metallic substrate and the second metallic substrate, the undulating member defining a plurality of first peaks adjacent to a first surface of the first metallic substrate and a plurality of second peaks adjacent to a second surface of the second metallic substrate, wherein a first support of the supports is positioned such that the first support extends between a first peak of the plurality of first peaks and the second surface of the second metallic substrate; welding the first peak to the first surface of the first metallic substrate in an area of the first support; and removing the first support by at least one of a thermal removal process or a chemical removal process.

A system and a corresponding method are provided for interconnecting the batteries in a battery pack in a manner that is designed to simplify the connection process, thereby improving throughput. The system uses two different types of interconnects; wire and ribbon interconnects. The wire interconnects are attached to each battery's large contact area terminal nub while the ribbon interconnects are attached to the crimped edge region of each battery's case.

A heat assisted friction stir welding system and fastener for use therewith allows the joining a variety of dissimilar materials, including joining composites and plastics to metal, in which the fastener becomes part of the bond. The fastener can be constructed from multiple materials, allowing for the joining of dissimilar metals. Heating the materials to be joined reduces the clamping force and torque required by the friction stir weld process. The result is a bond that is stronger with less energy input.