US-12626837-B2 - Method for manufacturing fusing busbar

US12626837B2US 12626837 B2US12626837 B2US 12626837B2US-12626837-B2

Abstract

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.

Inventors

Kiyoung Kim
YOUNGMIN LEEM

Assignees

A.F.W. CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20221111
Priority Date: 20220124

Claims (3)

1 . A method for manufacturing a fusing busbar, the method comprising: a disposing step of disposing wound second conductors and a wound first conductor formed of a different material from the second conductors; a 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 press-weld the second conductors onto upper and lower surfaces of the first conductor to form a rolled joined plate; a cutting step of removing the second conductors of the rolled joined plate on the upper and lower surfaces of the first conductor to a predetermined width at a middle of the rolled joined plate to expose the first conductor; and a a forming step of press-forming the cut joined plate into a busbar shape to form the fusing busbar in which the second conductors are disposed on the upper and lower surfaces the first conductor on two opposite sides of the fusing busbar, and the first conductor is exposed in a middle of the fusing busbar.
2 . The method of claim 1 , wherein the first conductor is an aluminum plate, and the second conductors are copper plates.
3 . The method of claim 2 , further comprising a heating step of heating the first conductor and the second conductors at different temperatures, respectively, while unwinding the first conductor and the second conductors during the rolling step.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Korean Patent Application No. 10-2022-0009844 filed in the Korean Intellectual Property Office on Jan. 24, 2022, the disclosure of which is incorporated by reference herein in its entirety. TECHNICAL FIELD The disclosure relates to a method for manufacturing a fusing busbar, and more particularly, a method for manufacturing a fusing busbar by press-welding a first conductor and a second conductor, which are different materials, to reduce weight and manufacturing costs while providing a fusing function. DISCUSSION OF RELATED ART Electric components that use electricity perform their functions by receiving electricity from a battery or a power generator. If an overcurrent flows in the circuit to which electricity is supplied, the electric component may be damaged. To prevent this, a fuse is used which is installed between the power supply and the electric component receiving electricity to melt and break upon supply of excessive electricity to thereby stop overcurrent from flowing to the electric component. In other words, the fuse is a component commonly used in electronic and electrical engineering to protect a mechanical device from an overcurrent in an electric circuit. Basically, a fuse is a thin metal wire that melts when an overcurrent flows and blocks the flow of current. Such fuses may be manufactured as busbars which are shaped as a long flat plate depending on their current blocking capacity. Recently, as electric vehicles spread, use of high-capacity batteries for electric vehicles significantly increases, and so does use of fusing busbars to increase electric stability for electric vehicles. The conventional fusing busbar mainly used in electric vehicles uses copper as its main material, which has excellent electrical conductivity compared to the price, to increase the efficiency of electricity supply, and the fusing busbar is formed in a bar shape with a predetermined thickness to stably supply high electricity and has a thin melting portion in the center to break and block electricity when over electricity flows. As such, the conventional fusing busbar uses copper which is expensive and heavy, causing an increase in manufacturing cost and an obstacle to making lightweight electric vehicles. According to an embodiment, there is provided a method for manufacturing a fusing busbar by press-welding a first conductor and a second conductor, which are different materials, to reduce weight and manufacturing costs while providing a fusing function. According to an embodiment, there is provided a method for manufacturing a fusing busbar in which the first conductor exposed by cutting the press-welded plate function as a melting portion performing a fusing function. According to an embodiment, 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, 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 method may further comprise a first cutting step of cutting internal ends of the second conductors into a predetermined width along a length direction of the joined plate. According to an embodiment, a method for manufacturing a fusing busbar comprises a second disposing step of disposing wound second conductors on upper and lower surfaces of a wound first conductor formed of a different material from the second conductors, a second 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 press-weld the second conductors onto the upper and lower surfaces of the first conductor, a second cutting step of cutting the second conductors on the upper and lower surfaces of the first conductor to a predetermined width to partially expose the first conductor of a rolled joined plate of the first conductor and the second conductors, inserting the cut joined plate 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 first conductor may be an aluminum plate, and the second cond