A block copolymer consists mainly of structural units each derived from an ethylenically unsaturated monomer and has at least one mercapto group. The block copolymer has an Mn of 5,000-500,000 and has a block structure, which is an A-B-A triblock structure or a star-shaped block structure of [A-B]qX. The q is an integer of 2-6. The polymer block (A) has a glass transition temperature of 20° C. or higher. The polymer block (B) of the triblock structure has a glass transition temperature lower than 20° C., and the [polymer block (B)]qX of the star-shaped block structure has a glass transition temperature lower than 20° C. The X is an initiator residue or/and a coupling-agent residue or is a derivative thereof.

A block copolymer consists mainly of structural units each derived from an ethylenically unsaturated monomer and has at least one mercapto group. The block copolymer has an Mn of 5,000-500,000 and has a block structure, which is an A-B-A triblock structure or a star-shaped block structure of [A-B]qX. The q is an integer of 2-6. The polymer block (A) has a glass transition temperature of 20° C. or higher. The polymer block (B) of the triblock structure has a glass transition temperature lower than 20° C., and the [polymer block (B)]qX of the star-shaped block structure has a glass transition temperature lower than 20° C. The X is an initiator residue or/and a coupling-agent residue or is a derivative thereof.

A bus bar includes members made from a conductive material and consecutively arranged to form a plate shape defining a wiring pathway. The members adjacent to each other have connection surfaces at which the members adjacent to each other are connected to each other by laser joining. The members adjacent to each other include at least one tolerance buffer between the members adjacent to each other. In the at least one tolerance buffer, the connection surfaces of the members adjacent to each other have different widths.

A bus bar includes members made from a conductive material and consecutively arranged to form a plate shape defining a wiring pathway. The members adjacent to each other have connection surfaces at which the members adjacent to each other are connected to each other by laser joining. The members adjacent to each other include at least one tolerance buffer between the members adjacent to each other. In the at least one tolerance buffer, the connection surfaces of the members adjacent to each other have different widths.

A method for manufacturing a fusing busbar comprises a first disposing step of disposing wound second conductors on upper and lower surfaces of two opposite ends of a wound first conductor formed of a different material from the second conductors, a first rolling step of unwinding the first conductor and the second conductors and continuously feeding the first conductor and the second conductors to a rolling mill to continuously press-weld the second conductors onto the upper and lower surfaces of the two opposite ends of the first conductor, with a predetermined gap between the second conductors, and a first forming step of inserting a joined plate of the first conductor and the second conductors into a forming machine to press-form the joined plate into a busbar shape in which the second conductors are disposed on two opposite sides of the joined plate, and the first conductor is exposed in a middle of the joined plate.

A method for manufacturing a fusing busbar comprises a first disposing step of disposing wound second conductors on upper and lower surfaces of two opposite ends of a wound first conductor formed of a different material from the second conductors, a first rolling step of unwinding the first conductor and the second conductors and continuously feeding the first conductor and the second conductors to a rolling mill to continuously press-weld the second conductors onto the upper and lower surfaces of the two opposite ends of the first conductor, with a predetermined gap between the second conductors, and a first forming step of inserting a joined plate of the first conductor and the second conductors into a forming machine to press-form the joined plate into a busbar shape in which the second conductors are disposed on two opposite sides of the joined plate, and the first conductor is exposed in a middle of the joined plate.

The present disclosure provides an electric wire including: a plurality of conductors that have been twisted together; and an insulation coating that covers an outer circumference of the plurality of conductors, wherein the plurality of conductors include: a plurality of outer conductors that are arranged along an outermost circumference; and at least one inner conductor that is provided on an inner side of the plurality of outer conductors, the at least one inner conductor includes one or more first strands, the one or more first strands are copper wires, each copper wire including a tin-plating layer, each of the plurality of outer conductors includes one or more second strands, and the one or more second strands are copper wires, each copper wire not including a plating layer.

A bus bar formed using a metal plate is provided. The metal plate includes one or more holes extending through the metal plate on a bend line. The bus bar includes a folded part formed by bending the metal plate along the bend line through hemming. The folded part includes a first region and a second region. The first region is located between an outer edge of the metal plate and the bend line. The second region overlaps in close contact with the first region. The bus bar also includes a terminal arranged in the first region. The folded part includes one or more welds in which the first region and the second region are welded to each other.

A bus bar formed using a metal plate is provided. The metal plate includes one or more holes extending through the metal plate on a bend line. The bus bar includes a folded part formed by bending the metal plate along the bend line through hemming. The folded part includes a first region and a second region. The first region is located between an outer edge of the metal plate and the bend line. The second region overlaps in close contact with the first region. The bus bar also includes a terminal arranged in the first region. The folded part includes one or more welds in which the first region and the second region are welded to each other.

A bus bar, which includes a metal bar made of an electrically conductive metal material; a bandage member configured to surround the metal bar except for both ends of the metal bar; and an insulating tube configured to surround the metal bar and the bandage member together, wherein the bandage member is made of a metal wire having a surface coated with a coating material having insulation and fire resistance.