KR102264554B1 - Method for manufacturing busbar and manufacturing busbar through the same and reel - Google Patents

Abstract

The present invention provides a bus bar manufacturing method, comprising the steps of: providing a first conductive material; supplying the first conductive material, but with at least one of a plurality of cutting and grinding operations in a state where forging is omitted. processing step, the first processing process is performed, and has a thickness of 70% or less compared to the thickness of the first conductive material, and irregularly and non-uniformly a plurality of different thicknesses in the width direction in a range that does not change the physical properties of the material A method for manufacturing a bus bar, comprising the steps of recovering a second conductive material having a step in the form of having a curved or round portion removed, and supplying the recovered second conductive material to perform a second processing, and a bus manufactured through the method A bar and a reel are provided.

Description

A method for manufacturing a bus bar, a bus bar manufactured therethrough, and a reel {METHOD FOR MANUFACTURING BUSBAR AND MANUFACTURING BUSBAR THROUGH THE SAME AND REEL}

The present invention relates to a method of manufacturing a bus bar, a bus bar manufactured through the same, and a reel.

In general, a bus bar is a rod-shaped conductor that enables electrical connection, such as a wire, and serves as a current path between electrical components.

Compared to conventional electric wires, bus bars have high space-use efficiency and have the advantage of supporting the load of electrical components, so they are essential for automobiles and airplanes where electrical components must be connected in a limited space.

In general, the bus bar is made of a copper material with high electrical conductivity and is manufactured in a single structure by forging. However, in the case of manufacturing the bus bar in this forging method, it can be manufactured to about 30% of the thickness of the entire metal material provided, and there is a problem in that plastic deformation occurs or hardness is excessively high during the manufacturing process. This could eventually degrade the electrical properties of the bus bar.

Republic of Korea Patent Publication No. 10-2018-0037364 (2018.04.12)

The present invention has been devised to solve the above technical problem, and by manufacturing a bus bar using a manufacturing method consisting of a post-processing method after omitting the forging method and pre-processing the target material, plastic deformation and deterioration of physical properties due to the forging method It is an object of the present invention to provide a method for manufacturing a bus bar capable of being fundamentally prevented and capable of being manufactured to a relatively thin thickness, a bus bar manufactured through the method, and a reel.

In addition, the present invention provides a method for manufacturing a bus bar capable of significantly reducing the change in electrical conductivity properties even after processing by preventing the change in physical properties due to the conventional forging method, and a bus bar and reel manufactured through the method for that purpose

In addition, the present invention provides a method for manufacturing a bus bar capable of manufacturing a bus bar with a relatively thinner thickness while minimizing plastic deformation that may occur during processing by a forging method, a bus bar manufactured through the same, and a reel to do that for that purpose.

An embodiment of the method for manufacturing a bus bar according to the present invention is

As a bus bar manufacturing method,

providing a first conductive material;

supplying the first conductive material, a first processing step performed including at least one of a plurality of times of cutting and grinding in a state where forging is omitted;

The first processing process is performed, and has a thickness of 70% or less compared to the thickness of the first conductive material, and has a plurality of different thicknesses irregularly and non-uniformly in the width direction in a range that does not change the physical properties of the material, curved or round recovering a second conductive material in which a step is formed in a form in which a portion is removed; and

It may include; supplying the recovered second conductive material to a second processing step.

In one embodiment of the present invention, the second conductive material may have a thickness of 2T or less.

In one embodiment of the present invention, the second processing may be press processing.

In addition, the present invention can provide a bus bar manufactured by the above bus bar manufacturing method.

On the other hand, the present invention has a plurality of different thicknesses to have a non-uniform thickness in the width direction in a state where forging is omitted, and is processed to form a step in which a curved or round portion is removed, cutting and grinding performed at least once It is possible to provide a reel supplied for press processing from a conductive material manufactured including at least one of processing.

In one embodiment of the present invention, it is possible to provide a bus bar manufactured including the reel.

The bus bar manufacturing method according to the present invention, and the bus bar and reel manufactured through the same, omit the forging method and sequentially manufacture the bus bar using a manufacturing method consisting of a pre-processing and a post-processing method, so that plastic deformation by the forging method and While it is possible to fundamentally prevent deterioration of physical properties, there is an effect that it can be manufactured with a relatively thin thickness.

In addition, the method for manufacturing a bus bar according to the present invention, and the bus bar and reel manufactured through the same have the effect of preventing the change in physical properties due to the conventional forging method, thereby greatly reducing the change in electrical conductivity properties even after processing.

In addition, the method for manufacturing a bus bar according to the present invention, and the bus bar and the reel manufactured therefor minimize plastic deformation that may occur during machining by the forging method, and the bus bar can be manufactured with a relatively thinner thickness. It works.

1 is a block diagram showing a manufacturing process of a bus bar according to an embodiment of the present invention;
Figure 2 is a partial cross-sectional view of part 'A' of Figure 1,
3 is a cross-sectional view of a conductive material according to a process in which cutting processing is performed according to an embodiment of the present invention;
4 to 5 are views showing various examples of a bus bar manufactured by a method for manufacturing a bus bar according to an embodiment of the present invention;
6 is a flowchart illustrating a manufacturing process of a bus bar according to an embodiment of the present invention.

Hereinafter, an embodiment of a method for manufacturing a bus bar according to the present invention, and a bus bar and a reel manufactured through the same will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 is a block diagram showing a manufacturing process of a bus bar according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of part 'A' of FIG. 1 , and FIG. 3 is an embodiment of the present invention A cross-sectional view of a conductive material cut according to an embodiment is shown, and FIGS. 4 to 5 are diagrams schematically showing various examples of a bus bar manufactured by a bus bar manufacturing method according to an embodiment of the present invention. is shown.

1 to 5, the bus bar manufacturing apparatus according to the present invention is a roll-type first reel 110, a first conductive material S fed from one side while being supplied from the first reel 110 (S). ), the first conductive material (S) is formed by processing at least one or more cutting portions 120 and grinding portions 130, respectively, which are continuously formed along the direction in which the first conductive material (S) is processed. The second conductive material S2 may include a second reel 150 from which the second conductive material S2 is recovered, and a press unit 140 for manufacturing the second conductive material S2 into a predetermined shape.

The bus bar manufacturing apparatus according to the present invention may be manufactured in a reel to reel type. The reel-to-reel method is a method in which a process is performed while a conductive material is supplied between the first reel 110 and the second reel 150, and the first reel 110 has a roll-type first conductive material (S) can be rolled up.

At least one cutting unit 120 and one or more grinding units 130 may be provided to perform at least one of cutting and grinding of the first conductive material S, respectively. The processed first conductive material S, that is, the second conductive material S2 , may be rewound on the second reel 150 . At this time, at least one cutting unit 120 and at least one grinding unit 130 may be provided, respectively, and through this, cutting and grinding may be performed simultaneously or selectively at least once or more. A machining process according to an embodiment in which the at least one or more cutting and grinding operations are performed intermittently or continuously will be further described below with reference to FIG. 3 .

Here, as shown in FIG. 2 presented by the present invention, the second conductive material S2 may be wound with a non-uniform thickness t in the width W direction. For example, the second conductive material S2 may include a first layer S-1, a second layer S-2, and a third layer S-3 having a plurality of step portions S-5 formed therein. can be formed.

The press unit 140 may be provided to process the second conductive material S2 by pressing. Such a pressing process may be a step of forming an external shape by performing punching, fracture, or bending by a press using a reel-to-reel method.

3 is a cross-sectional view of a conductive material according to a process in which a cutting process is performed according to an embodiment of the present invention.

Referring to FIG. 3 , an apparatus for manufacturing a bus bar according to the present invention includes a roll-type first reel 110 , a first conductive material S fed from one side while being supplied from the first reel 110 , and a second 1 At least one cutting part 120 and a grinding part 130 which are each continuously formed along the direction in which the conductive material (S) proceeds, and the first conductive material (S) is cut and ground at least once or more A second conductive material (S2) formed by processing, a second reel 150 from which the second conductive material (S2) is recovered, and a press unit 140 for manufacturing the second conductive material (S2) into a predetermined shape. can do.

The bus bar manufacturing apparatus according to the present invention may be manufactured in a reel to reel type. The reel-to-reel method is a method in which a processing process is performed while a conductive material is supplied between the first reel 110 and the second reel 150, and the first reel 110 has a roll-type first conductive material ( S) can be wound. At least one or more of each of the cutting unit 120 and the grinding unit 130 may be provided to perform at least one processing process of cutting and grinding the first conductive material S, respectively. The processed first conductive material S, that is, the second conductive material S2 , may be rewound on the second reel 150 .

Here, according to the present invention, cutting of the conductive material may be performed at least one time or more intermittently or continuously through the cutting part 120 provided with at least one or more. In addition, the conductive material may be subjected to at least one grinding process intermittently or continuously through the grinding unit 130 provided with at least one or more. In the conductive material, the cutting and grinding may be performed at least one time or more, respectively, or randomly at the same time.

Subsequently, the conductive material S2 may be pressed through the press unit 140 . Such a pressing process may be performed with a reel press using a reel to reel method, punching, fracture, or bending to form an outer shape.

In a specific example, as shown in FIG. 3 , after the roll-type first conductive material S is processed on the first reel 110 , two or more cutting operations are performed through the cutting unit 120 before being wound. can be That is, first, the first conductive material (S) having a thickness of about 2T (T1) is provided, and the first conductive material (S) is provided to have a thickness of about 1.5T (T2) primarily through the cutting part 120 . of the first cutting process may be performed. Subsequently, secondary cutting processing (refer to the red dotted line) of the first conductive material S may be continuously performed to have a thickness of approximately 0.8T (T3) according to a preset thickness value. The second cutting processing may be additionally continuously processed with a preset width (W) and thickness (T) at the same position where the first cutting processing is performed.

In this case, the first and second cutting machining may be performed intermittently or continuously at least once or more according to a preset machining method, thickness, machining length, machining width, machining frequency, and the like. The processing method according to the present invention may be preset so that cutting or grinding processing may be simultaneously or selectively performed at least once or more according to the shape and type of the bus bar finally manufactured from the conductive material. For example, it may be performed after being set in various ways such as cutting-cutting-grinding-cutting or cutting-grinding-cutting.

In addition, although cutting or grinding processing is described as a processing method in the present invention, it is not limited thereto, and it is not particularly limited as long as it is a metal processing method that can achieve the object disclosed in the present invention in a known method of processing a metal plate. is of course

For reference, the cutting process is performed by cutting a chip from the metal using a cutting tool such as a milling machine or lathe having a greater hardness than the metal to be formed to form a desired shape. means to make the metal of Typically, this cutting process involves fixing metal on a milling machine table and rotating it with a rotary cutting tool, a milling cutter, to cut irregular and complex surfaces, or milling machine machining that can cut drill grooves and gear teeth. can be heard

Hereinafter, a manufacturing process of such a bus bar manufacturing apparatus will be described.

5 is a flowchart schematically illustrating a bus bar manufacturing process according to an embodiment of the present invention.

Referring to FIG. 5 with reference to FIGS. 1 to 4 , first, a first conductive material S of a metallic material coated with a conductive material is prepared. The first conductive material (S) may be continuously supplied in one direction from one side on the first reel (110) (S100). At this time, the first conductive material (S) may be processed to have the same thickness in the width direction.

Subsequently, the first conductive material (S) supplied on the plane may be subjected to plane processing while passing through at least one cutting part 120 and the grinding part 130 . At this time, the first conductive material S may be simultaneously or selectively subjected to at least one cutting and grinding process through at least one cutting unit 120 and grinding unit 130 according to a preset condition ( S200). Here, according to the present invention, when such a cutting and grinding process is performed, the first conductive material (S) is processed to have an irregular and non-uniform thickness (t) in the width direction, thereby forming the second conductive material (S2). It can be processed (S300).

Although the drawings of the present invention show examples in which the first conductive material (S) can be cut and ground, as a conductive material, for example, a shape having a different thickness in the width direction within a range that does not change the physical properties of the metal plate material It is not particularly limited as long as it is a processing method that can achieve

Thereafter, the second conductive material S2 may be recovered to the second reel 150 in a processed state to have a non-uniform thickness t. At this time, as described above, since the second conductive material S2 has a non-uniform thickness in the width direction, it may be wound on the second reel 150 with an irregular thickness.

Next, the second conductive material S2 wound on the second reel 150 may be pressed through the press unit 140 while being supplied again. Through this, an outer shape for manufacturing the bus bar 100 may be finally determined.

In some cases, after such press working, the terminal connection part (not shown) that can be connected to the battery terminal may be plated and heat treated. For plating and heat treatment of the battery terminal connection part, masking may be included before that. For masking, a mask (not shown) for plating may be applied to an area excluding the terminal connection portion and a predetermined portion. The masking treatment performed before the plating treatment and heat treatment may be performed by attaching a tape (not shown) other than the above mask.

The plating may be performed with at least one of nickel (Ni), gold (Au), copper (Cu), and tin (Sn). Plating may be performed by electroplating, and after plating is performed, the mask and tape applied to the metal plate 10 may be removed.

The bus bar manufactured by the manufacturing method as described above can be manufactured with a thin thickness while minimizing plastic deformation during processing, and can maintain high electrical conductivity without significant change in physical properties even after processing.

Furthermore, the method for manufacturing a bus bar according to the present invention and the bus bar manufactured through the method can solve problems occurring in the conventional forging method. That is, conventionally, it is possible to process only about 30% of the thickness of the metal plate, which is a conductive material, by applying the forging process. However, it is possible to remove the forging process and manufacture a relatively thinner thickness of the metal plate through grinding and cutting. That is, according to the present invention, it is characterized in that it can be processed to have a thickness of about 70% or less, for example, 2T or less, compared to the thickness of the metal plate, which is a conductive material. This makes it possible to implement various desired shapes when manufacturing the bus bar, as shown in FIGS. 4 to 5 , thereby improving the precision of the width change part of the metal plate material. This can greatly improve the flatness by removing the round portion of the curved shape of the step portion generated in the conventional forging process.

In addition, the manufacturing method according to the present invention omits the conventional forging method that can only be produced in large quantities, so that not only mass production in a reel-to-reel method but also a small amount of production is possible.

In the above, an embodiment of a method for manufacturing a bus bar according to the present invention and a bus bar and a reel manufactured through the same have been described in detail with reference to the accompanying drawings. However, the embodiment of the present invention is not necessarily limited by the above-described embodiment, and it is natural that various modifications and implementations within an equivalent range are possible by those skilled in the art to which the present invention pertains. will be. Therefore, the true scope of the present invention will be determined by the claims to be described later.

100: bus bar 110: first reel
120: cutting unit 130: grinding unit
140: press unit 150: second reel
S: first conductive material S2: second conductive material
S-1: first layer S-2: second layer
S-3: first layer S-5: step part

Claims (5)

As a bus bar manufacturing method,
providing a first conductive material;
supplying the first conductive material, but performing a first processing including at least one of a plurality of times of cutting and grinding in a state where forging is omitted;
The first processing process is performed, but has a thickness of 70% or less compared to the thickness of the first conductive material, and has a plurality of different thicknesses irregularly and non-uniformly in the width direction in a range that does not change the physical properties of the material, curved or round recovering a second conductive material in which a step is formed in a form in which a portion is removed; and
A bus bar manufacturing method comprising a; supplying the recovered second conductive material to a second processing step.
The method of claim 1,
wherein the second conductive material has a thickness of 2T or less.
The method of claim 1,
The second processing process is a bus bar manufacturing method that is press processing.
A bus bar manufactured by the method for manufacturing a bus bar according to claim 1 .
It has a plurality of different thicknesses so as to have a non-uniform thickness in the width direction in a state where forging is omitted, and is processed to form a step in which a curved or round portion is removed, at least one of cutting and grinding performed at least once A reel supplied for press processing from a conductive material manufactured including

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