KR20220061820A - Single-plate flexible busbar and manufacturing method thereof - Google Patents

Abstract

According to embodiments of the present invention, a flexible busbar comprises: terminal parts located at both ends of the flexible busbar; and a conductive line part disposed between terminal parts, wherein the conductive line part is located in a central region excluding both ends of the flexible busbar. The terminal parts include at least two first conductive layers stacked. The conductive line part includes at least two second conductive layers stacked. The first conductive layers has a single plate bent.

Description

SINGLE-PLATE FLEXIBLE BUSBAR AND MANUFACTURING METHOD THEREOF

The present invention relates to a single plate bus bar, and more particularly, to a single plate flexible bus bar capable of securing sufficient flexibility of the bus bar, improving electrical properties and maximizing durability, and a method for manufacturing the same.

In recent vehicles (especially electric vehicles, etc.), various electric devices are built in a modularized form, and each module of such electric devices has sufficient energization capability in a narrow space, and is flexible and capable of stably supplying power within a given narrow space. A bus bar is required.

In order to solve the above-mentioned needs, prior documents such as Korean Patent Application Laid-Open No. 10-2020-0064919 (June 8, 2020) and Korean Patent Application Laid-Open No. 10-2015-0101154 (September 3, 2015), etc. Although a flexible bus bar has been disclosed that secures flexibility and conduction ability by stacking conductors, there is a problem in that minute gaps or misalignment occur between the laminated plate-shaped conductors due to bending, etc. Flexibility is reduced by shrinking tube or covering surrounding the material, and sufficient durability by itself is also not secured.

In order to solve this problem, conventional welding between laminates or using filler metal such as indium between joints as in Korean Patent Application Laid-Open No. 10-2019-0128098 (2019.11.15.) is used to reduce electrical resistance and heat issues. Efforts have been made, but in this case, it is difficult to secure the flexibility of the bus bar, and there is a limit to the effect of reducing the electrical resistance due to the difference in materials and properties between the welding member or the filler metal and the main conductor.

Korean Patent Publication No. 10-2020-0064919 (2020.06.08.) Korean Patent Publication No. 10-2015-0101154 (2015.09.03.) Korean Patent Publication No. 10-2019-0128098 (2019.11.15.)

The present invention has been devised to solve the above-described problems, and an object of the present invention is to provide a single-plate flexible bus bar capable of securing sufficient flexibility of the bus bar, improving electrical characteristics and maximizing durability, and a method for manufacturing the same. is to provide

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to embodiments of the present invention in order to solve this problem, preparing a conductive plate; forming a laminated conductive bar by performing at least one of a bending process and a rolling process on the conductive plate; and cutting both sides of a central region excluding both ends of the multilayer conductive bar to form terminal parts positioned at both ends and conductive line parts positioned in the central region; single plate flexible bus bar manufacturing method comprising a this is provided

In some embodiments, the forming of the stacked conductive bar may include: bending and stacking a first plate region of the conductive plate; and rolling so that a second plate region excluding the first plate region of the conductive plate surrounds the bent-stacked first plate region.

The forming of the terminal part and the conductive line part may include: welding an end of the rolled second plate region positioned in the terminal part; and punching the terminal part to form a connection hole.

In some embodiments, the forming of the laminated conductive bar may include: rolling the conductive plate from one side to the other side; and pressing the rolled conductive plate.

According to embodiments of the present invention, terminal portions located at both ends of the flexible bus bar; and a conductive line portion disposed in a central region excluding both ends of the flexible bus bar and disposed between the terminal portions, wherein the terminal portion includes at least two stacked first conductive layers, the conductive line The portion includes at least two or more stacked second conductive layers, wherein the first conductive layers are provided with a flexible bus bar in which a single plate is bent.

In some embodiments, both the first conductive layers and the second conductive layers may be connected by the single plate.

The flexible bus bar according to the embodiments of the present invention is made of a single plate and is composed of a plurality of conductive layers cut to each other in the region where the conductive line part is located, so that electrical conductivity due to microscopic gaps between bonding surfaces by lamination and welding parts, etc. It is possible to maximize the electricity transfer efficiency of the busbar by fundamentally blocking the deterioration, and the durability of the busbar itself due to the heating of gaps and welds in high voltage and high current situations decreases the durability of the busbar itself and causes damage to parts electrically connected to or adjacent to the busbar. It is possible to solve the problem, and furthermore, it is possible to secure sufficient flexibility of the bus bar for versatility in various application environments.

1 is a perspective view exemplarily showing a single-plate flexible bus bar according to some embodiments of the present invention.
2 is a flowchart illustrating a method of manufacturing a single-plate flexible bus bar according to some embodiments of the present invention.
3 to 9 are exemplary views for explaining step-by-step a method of manufacturing a single-plate flexible bus bar according to some embodiments of the present invention.
10 to 12 are exemplary views for explaining step-by-step a method of manufacturing a single-plate flexible bus bar according to other sub-embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but may be implemented in various different forms, and only these embodiments make the publication of the present invention complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

In addition, in this specification, the singular form may also include a plural form unless otherwise specified in the phrase. As used herein, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

1 is a perspective view exemplarily showing a single-plate flexible bus bar according to some embodiments of the present invention.

Referring to FIG. 1 , the flexible bus bar 100 may include terminal units 110 positioned at both ends of the bus bar and a conductive line unit 120 disposed between the terminal units 110 . Specifically, the flexible bus bar 100 extends in a first direction (X-axis direction in FIG. 1 ), and each of the terminal parts 110 is located at both ends of the first direction to include other external bus bars, circuits, It is connected to electronic components, electronic products, and wiring, and accordingly, current can be smoothly transmitted in the first direction.

The terminal unit 110 may have a structure in which a plurality of conductive layers are stacked. For example, as shown in FIG. 1 , each of the plurality of conductive layers may have a plane extending in the first direction and the second direction (the Y-axis direction in FIG. 1 ), and each of the plurality of conductive layers includes a first They may be stacked in three directions (the Z-axis direction of FIG. 1 ). That is, the terminal unit 110 may include at least two or more stacked first conductive layers 111 .

Meanwhile, in embodiments of the present invention, the stacked first conductive layers 111 may be single-plate bent ones. In other words, the stacked first conductive layers 111 may include substantially one conductive plate 10 (see FIGS. 4 to 12 ).

In some embodiments, the terminal part 110 may have a connection hole 30 penetrating through the terminal part 110 in the third direction, but is not limited thereto.

In addition, although not shown, at least one side of the terminal part 110 may include a welding part formed by welding one end of the conductive plate 10 to the terminal part 110 body.

The conductive line part 120 may be electrically connected to the terminal parts 110 between the terminal parts 110 and may extend in the first direction. That is, the conductive line part 120 is located in a central region except for both ends of the flexible bus bar 100 .

The conductive line unit 120 may also have a structure in which a plurality of conductive layers are stacked like the terminal unit 110 . For example, as shown in FIG. 1 , each of the plurality of conductive layers may have a plate-shaped structure extending on an X-Y plane, and each of the plurality of conductive layers may be stacked in the third direction. That is, the conductive line unit 120 may include at least two stacked second conductive layers 121 .

When viewed only in the region where the conductive line part 120 is located (ie, the central region excluding both ends of the flexible bus bar 100 ), the second conductive layers 121 are a plurality of physically cut off each other. They may be conductive layers, and accordingly, the conductive line part 120 may have sufficient flexibility in the third direction as shown in FIG. 1 , and may also have rotation flexibility about the X axis as the central axis.

On the other hand, when viewed as a whole of the flexible bus bar 100 without being limited to the region where the conductive line part 120 is located, the second conductive layers 121 are formed of one conductive plate 10, and further One conductive plate 10 is also formed with one conductive layer 111 .

That is, in the present specification, for clarity of explanation, the terminal parts 110 and the conductive line part 120 are separated and the first conductive layers 111 and the second conductive layers 121 are separately described, but the terminal parts 110 and the conductive line part 120 or the first conductive layers 111 and the second conductive layers 121 are not physically separated from each other. That is, the terminal units 110 and the conductive line unit 120 may extend integrally without separate bonding portions, as shown in FIG. 1 . In other words, the first conductive layers 111 stacked on each of the terminal parts 110 and the second conductive layers 121 stacked on the conductive line part 120 are all connected by a single conductive plate 10 . can

The flexible bus bar 100 of the present invention is made of a single plate as described above, but is composed of a plurality of conductive layers cut to each other in the region where the conductive line part 120 is located, so that a fine gap between bonding surfaces by lamination and/or Alternatively, it is possible to maximize the electricity transfer efficiency of the busbar by fundamentally blocking the decrease in electrical conductivity (that is, increase in electrical resistance) caused by welding, etc. For example, surface corrosion, etc.) and damage to parts electrically connected to or adjacent to the bus bar can be solved, and furthermore, sufficient flexibility of the bus bar for versatility in various application environments can be secured. do.

2 is a flowchart illustrating a method of manufacturing a single plate flexible bus bar according to some embodiments of the present invention, and FIGS. 3 to 9 are a manufacturing method of a single plate flexible bus bar according to some embodiments of the present invention. It is an example diagram to explain step by step.

2 to 9 , the flexible bus bar manufacturing method includes preparing the conductive plate 10 ( S10 ), bending or rolling at least a partial region 10_1 of the conductive plate 10 . to form the laminated conductive bar 10' (S20), by cutting both sides of the central region excluding both ends of the laminated conductive bar 10' to the terminal part 110 and the conductive line part 120 It may include the step of forming (S30).

In step S20 , the stacked conductive bar 10 ′ may extend in the first direction (X-axis direction) and may be formed in various ways.

In some embodiments, the laminated conductive bar 10 ′ is laminated by bending the first plate region 10_1 of the conductive plate 10 as shown in FIGS. 4 to 5 , and the first plate region 10_1 The second plate region 10_2 except for the second plate region 10_2 may be formed by rolling to surround the bent-stacked first plate region 10_1 .

On the other hand, in some embodiments, unlike shown in the drawings, the stacked conductive bar may be formed by bending and stacking the entire area of the conductive plate 10 without distinction of the first and second plate areas 10_1 and 10_2, but the present invention In the laminated conductive bar of the stacked conductive bar, since a single conductive plate is bent and stacked, the stacking structure may be spread by the restoring force of the bending portion. Considering this, the second plate region 10_2 is It is more preferable to roll so as to surround the bent-stacked first plate region 10_1.

In step S30, the conductive line part 120 is cut along the third direction (Z-axis direction) of both sides of the central region (B, see FIG. 7 ) except for both ends of the stacked conductive bars 10 ′ and 20 ′. can be formed by Accordingly, when viewed only in the region where the conductive line part 120 is located (that is, the central region excluding both ends of the flexible bus bar 100 ), the conductive line part 120 includes a plurality of conductive lines that are physically cut from each other. It may have a structure in which layers are stacked.

On the other hand, the flexible bus bar manufacturing method of the present invention forms a connection hole 30 by welding the end region (region A, see FIG. 8 ) of the rolled second plate region ( S40 ) and punching the terminal part 110 . It may further include a step (S50) of doing.

In FIG. 2 , the welding step ( S40 ) has been described as a process following the conductive line forming step ( S30 ), but the present invention is not limited thereto. That is, of course, after welding the ends of the conductive plate 10 positioned on the laminated conductive bar first, a cutting process for forming the conductive line portion may be performed.

The connection hole forming step (S50) is also not limited to the order. For example, the connection hole forming process may be performed simultaneously with the cutting process for forming the conductive line part.

10 to 12 are exemplary views for explaining step-by-step a method of manufacturing a single-plate flexible bus bar according to some other exemplary embodiments of the present invention.

10 to 12 , the flexible bus bar manufacturing method includes the steps of preparing a conductive plate as described above with reference to FIG. 2 ( S10 ), forming the stacked conductive bar 20 ′ ( S20 ), and lamination. The method may include cutting both sides of the central region of the conductive bar 20' to form a terminal part and a conductive line part (S30).

The laminated conductive bar 20 ′ in this embodiment is different from that described with reference to FIGS. 3 to 6 , after rolling the conductive plate from one side to the other side, the rolled conductive plate is removed as shown in FIG. 11 . There is a difference in that it is formed by pressing in three directions (Z-axis direction). After forming the laminated conductive bar 20', similar to that described with reference to FIGS. 7 to 9, the distal end of the rolled conductive plate is welded, and a process of forming a conductive line part and a connection hole is performed. It is possible to manufacture the flexible bus bar 200 .

A person of ordinary skill in the art related to this embodiment will understand that it can be implemented in a modified form without departing from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (6)

A method for manufacturing a single plate flexible bus bar, the method comprising:
preparing a conductive plate;
forming a laminated conductive bar by performing at least one of a bending process and a rolling process on the conductive plate; and
Cutting both sides of the central region excluding both ends of the stacked conductive bar to form terminal parts positioned at both ends and conductive line parts positioned in the central region; characterized in that it comprises, A method for manufacturing single-plate flexible busbars.
According to claim 1,
Forming the laminated conductive bar comprises:
laminating by bending a first plate region of the conductive plate; and
rolling so that a second plate region of the conductive plate excluding the first plate region surrounds the bending-stacked first plate region;
3. The method of claim 2,
The forming of the terminal part and the conductive line part comprises:
welding an end of the rolled second plate region located in the terminal portion; and
and forming a connection hole by punching the terminal part.
According to claim 1,
Forming the laminated conductive bar comprises:
rolling the conductive plate from one side to the other side; and
Compressing the rolled conductive plate; A method of manufacturing a single-plate flexible bus bar comprising: a.
In the flexible bus bar,
terminal portions positioned at both ends of the flexible bus bar; and
and a conductive line portion disposed between the terminal portions, located in a central region excluding the both ends of the flexible bus bar; and
The terminal unit includes at least two or more stacked first conductive layers,
The conductive line part includes at least two or more stacked second conductive layers,
The flexible bus bar, wherein the first conductive layers are a single plate bent.
6. The method of claim 5,
The flexible bus bar, characterized in that all of the first conductive layers and the second conductive layers are connected by the single plate.

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