JP2020004525A - Shunt wire - Google Patents

Abstract

To provide shunt wire which can bend extending direction of the shunt wire on one face at relatively large curvature without increasing thickness.SOLUTION: Shunt wire 1 comprises electric conductive terminals 20 at both ends of an L-shaped bendable conductor 10. The bendable conductor 10 is 2 laminar structure that three strand wire conductors 100 which length are different and stood in a row are overlapped in two layers. The strand wire conductor 100 which is put together so that the bendable conductor 10 bends in about 90 degree on one face gets longer from the end sequentially. A terminal 20 comprises a body part 200 connected to a terminal block and a skirt part 210 to protect a root part of the strand wire conductor 100. The body section 200 possesses a tapped hole 220.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shunt wire having terminals at both ends of a flexible conductor.

A technique described in Patent Document 1 is known as a technique in this field. According to this technique, since a plurality of flat braided wires are overlapped in the bending direction to form the flexible conductor, the cross-sectional area can be increased without impairing the flexibility. It says that a shunt wire can be obtained that absorbs advance and retreat due to expansion and contraction of the battery stack and hardly disconnects the connection between the extraction terminal and the relay. The shunt wire has an L-shape in which the center of the flexible conductor is bent at approximately 90 degrees in the thickness direction.
In general, there is known a configuration in which a plurality of stranded wire conductors in which copper thin wires are braided in a three-dimensional shape are combined in parallel. According to this technique, it is possible to obtain a shunt wire capable of deforming the flexible conductor into a torsion bar with the extending direction of the stranded conductor as the axis.

JP-A-2002-362165

Indeed, the shunt wire described in Patent Document 1 can be relatively easily bent by about 90 degrees in the direction in which the flat braided wires overlap. However, it is not easy to bend the direction in which the shunt wire extends perpendicularly to the direction by 90 degrees on the same plane.
In addition, it can be predicted that the shunt wire composed of the bundle of the stranded conductors will have better deformability of the flexible conductor than the case of the flat braided wire. However, since the thickness of the flexible conductor is increased, it is not easy to bend the shunt wire approximately 90 degrees in a direction extending on the same plane.

  The present invention has been made in view of the above-described problem, and provides a shunt wire that can bend a direction in which a shunt wire extends on a same surface with a relatively large curvature without increasing the thickness of a flexible conductor. As an issue.

  The shunt wire of the present invention is: (1) a shunt wire having a conductive terminal at both ends of a flexible conductor, wherein the flexible conductor comprises a combination of two or more stranded wire conductors having different lengths; The combination of the stranded conductors is characterized in that it is sequentially elongated from the end.

  According to the present invention, since the flexible conductor is a combination of stranded wire conductors that are sequentially elongated from the end, the direction in which the shunt wire extends can be bent with a relatively large curvature on the same plane without increasing the thickness of the flexible conductor. A shunt wire is obtained.

  Preferably, the shunt wire of the present invention is characterized in that (2) the combined stranded wire conductors are adjusted to have different lengths so that the flexible conductor bends substantially 90 degrees on the same plane ( 1) It is as described.

  According to the present invention, a shunt wire that can connect two terminal blocks even when there is an obstacle in the linear direction can be obtained.

Preferably, the shunt wire of the present invention is characterized in that (3) the flexible conductor described in the above (1) is overlapped in two or more layers in the thickness direction.

  According to the present invention, a shunt wire that can be easily three-dimensionally deformed is obtained because it is composed of a combination of a plurality of stranded conductors in both the thickness direction (vertical direction) and the width direction.

  Preferably, the shunt wire of the present invention is characterized in that (4) the terminal includes a main body connected to the stranded conductor, and the main body includes a skirt at an end where the stranded conductor is continuous ( 1) to (3).

  According to the present invention, since the terminal is provided with the skirt portion, the stranded wire conductor comes into contact with the inner surface of the skirt portion, so that a shunt wire that does not come into contact with the cut surface of the tubing material and can be damaged is obtained.

FIG. 1 is an external perspective view of a shunt wire according to an embodiment of the present invention. 2A and 2B are assembly process diagrams of the shunt wire, in which (1) shows the preparation of constituent members, (2) shows the state before crimping, and (3) shows the state after crimping. FIG. 3 is a completed view of the shunt wire, (1) is a plan view, and (2) is an external view of application to a terminal block. FIG. 4 is an example of use of a shunt wire according to another embodiment of the present invention. FIG. 5 is an example of use of a shunt wire according to still another embodiment of the present invention. FIG. 6 is an example of use of a shunt wire according to still another embodiment of the present invention.

  Embodiments of the present invention will be described with reference to the accompanying drawings. However, the technical scope of the present invention is not limited to these embodiments, and can be implemented without departing from the gist of the invention. FIG. 1 is an external perspective view of a shunt wire according to an embodiment of the present invention. 2A and 2B are assembly process diagrams of the shunt wire, in which (1) shows the preparation of constituent members, (2) shows the state before crimping, and (3) shows the state after crimping. FIG. 3 is a completed view of the shunt wire, (1) is a plan view, and (2) is an external view of application to a terminal block. FIG. 4 is an example of use of a shunt wire according to another embodiment of the present invention. FIG. 5 is an example of use of a shunt wire according to still another embodiment of the present invention. FIG. 6 is an example of use of a shunt wire according to still another embodiment of the present invention.

The shunt wire 1 has conductive terminals 20 attached to both ends of a flexible conductor 10 and is mounted on an electric circuit through which a relatively large current flows. In recent years, there has been seen an example in which the power supply is assembled in a power supply peripheral circuit of an electric vehicle, a hybrid car, and the like.
As shown in FIG. 1, the shunt wire 1 of the present embodiment is provided with conductive terminals 20 at both ends of a flexible conductor 10 that is bent at substantially 90 degrees on the same plane perpendicular to the thickness direction. The flexible conductor 10 is formed by bundling three stranded conductors 100 extending in a rod shape, and has a certain degree of flexibility. The flexible conductor 10 can be bent in the thickness direction within a limit in a state where the flexible conductor 10 is bent at substantially 90 degrees on the same plane.

  The stranded conductor 100 is formed by knitting a thin copper wire in a three-dimensional rod shape, and can be deformed in any direction about the axial direction. The flexible conductor 10 of the present embodiment is obtained by bundling three such stranded conductors 100 having high flexibility in parallel. The three stranded conductors 100 are bound at the terminal 20. The stranded conductor 100 is bendable within a limited range that is not restricted by the adjacent stranded conductor 100 except at both ends bound at the terminal 20. The surface of the stranded conductor 100 may be rust-proofed by tin plating or the like for durability and electrical characteristics.

  As shown in FIG. 1, the terminals 20 are provided at both ends of the flexible conductor 10 including three stranded conductors 100. The terminals 20 are respectively connected to the corresponding terminal blocks D, whereby the two terminals are electrically and mechanically connected by the shunt wire 1. The terminal 20 may be formed from a copper tube material having good conductivity, and may have a rust-proof surface such as tin plating. The terminal 20 and the stranded wire conductor 100 may be connected by crimping, and the crimping surface (inner peripheral surface) of the terminal 20 may be roughened to secure the holding strength.

  As shown in FIG. 1, the terminal 20 includes a main body 200 connected to the corresponding stranded conductor 100, and a skirt 210 covering a root portion of the stranded conductor 100 with the terminal 20. The main body 200 has a rectangular shape in a plan view, and has a screw hole 220 formed in the center thereof. The main body 200 has a smooth surface corresponding to the terminal block D in order to obtain a good connection with the corresponding terminal block D. The terminal 20 is fixed to the terminal block D through the screw hole 220 by screwing. There may be two or more screw holes.

<Assembly process>
The shunt wire 1 of the present embodiment is assembled according to the process shown in FIG. The shunt wire 1 is composed of a copper tube (20, hereinafter referred to as 20) which becomes a terminal 20 at both ends, and three stranded conductors 100 constituting the flexible conductor 10.

  Step 1 is preparation of a copper tube material 20 cut to a predetermined size and deformed into a slightly elliptical cross section, and preparation of three stranded conductors 100, as shown in (1) of FIG. The three stranded conductors 100 may be adjusted to the same length as shown in (1) of FIG. Alternatively, the dimensions may be adjusted in advance so that the end faces are aligned in a state where the end faces are bent at substantially 90 degrees. The cross-sectional area of the copper tube 20 is slightly larger than the bundle of the cross-sectional areas of the three stranded conductors 100, and the cross-sectional shape of the copper tubing 20 is elliptical so that the three stranded conductors 100 can be placed in parallel. It is.

  Step 2 is a step of inserting a bundle of three stranded conductors 100 into the copper tube material 20 prepared in Step 1 as shown in (2) of FIG. The bundle of the three stranded conductors 100 has a central portion bent at approximately 90 degrees in the process of step 2. A bend of approximately 90 degrees may be a large radius, or a bend of a small radius may be made without exceeding the limit. An end of the bundle of three stranded conductors 100 inserted from one end of the copper tube 20 is exposed from the other end of the copper tube 20. The amount of exposure of this end portion is gradually shortened from the inner side to the outer side.

  Step 3 is, as shown in (3) of FIG. 2, a crimping process and a completion process of the copper tube material 20 and the three stranded conductors 100. The copper tube 20 and the bundle of three stranded conductors 100 are connected by crimping. The copper tube material 20 having an elliptical cross section is formed into a terminal 20 having a substantially rectangular cross section by crimping. The three stranded wire conductors 100 are integrated at a high density by the crimping process, and are compressed so that the gap between the three stranded wire conductors 100 and the inner peripheral surface of the copper pipe material 20 becomes invisible. In the crimping process, as shown in FIG. 2 (3), a load is applied to a region excluding one end of the copper tube material 20, so that the one end is not deformed and the skirt portion 210 which spreads hem is formed. Will be done. Since the skirt portion of the terminal (copper tube material) 20 is formed in this manner, its length can be adjusted within a limit.

After crimping, the stranded wire conductor 100 exposed from the end of the terminal 20 is cut extra so as to be aligned with the end face of the terminal 20. Alternatively, the end face of the terminal 20 and the end face of the stranded conductor 100 may be aligned by partially cutting the end of the terminal 20. Thereby, the length of the terminal 20 after crimping can be adjusted. Alternatively, the dimensions and the setting position of the stranded conductor 100 may be adjusted in advance so that the end surface of the terminal 20 after crimping and the end surface of the stranded conductor 100 are aligned. In this way, the step of cutting the end face of the stranded conductor 100 after crimping can be omitted. A screw hole 220 is formed in the center of the main body 200 of the terminal 20 to obtain a completed shape of the shunt wire 1.

<Example of use>
FIG. 3 shows a usage example of the shunt wire 1. The shunt wire 1 has an L-shape in plan view that is bent at approximately 90 degrees on the same plane. If the two terminal blocks D to be connected cannot be connected linearly due to, for example, a structure (not shown) provided in the middle, the L-shaped shunt wire 1 is applied to bypass the structure (not shown). be able to. Further, when the two terminal blocks D are not at the same level in the height direction, the flexible conductor 10 is bent between the terminals in the height direction and applied so that obstacles and height levels different from each other are different. The terminal block D at the location can be connected to the shunt wire main body and surrounding structures without imposing an excessive load.

<Effect>
-The shunt wire 1 which bends about 90 degrees on the same plane orthogonal to the thickness direction is obtained.
-Since the three stranded conductors 100 are bent in parallel at approximately 90 degrees on the same plane, the shunt wire 1 in which the periphery of the bent portion is not particularly bulky can be obtained.
-Since the terminal 20 is provided with the skirt portion 210, the shunt wire 1 which does not apply a load to the stranded conductor 100 can be obtained.
-Since the three stranded conductors 100 are provided in parallel, the shunt wire 1 that can easily bend on the same plane and bend in the height direction can be obtained.

<Another embodiment>
Another embodiment of the present invention will be described with reference to FIG. The flexible conductor 10 ′ of another embodiment is composed of a total of six stranded conductors 100 in a two-tiered structure. Three stranded conductors 100 are arranged in parallel in both the upper and lower stages. The assembling process follows the assembling process of the above-described embodiment. As a result, a shunt wire 1 'can be obtained in which bending on the same plane perpendicular to the thickness direction and bending in the vertical direction can be performed without applying excessive force.

Still another embodiment of the present invention will be described with reference to FIG. The flexible conductor 10 of still another embodiment has a U-shape including three stranded conductors 100. Terminals 20 are provided at both ends of the flexible conductor 10. An intermediate terminal 30 is provided at the U-shaped bent portion. The posture is stabilized by fixing the intermediate terminal 30 to the support when three terminal blocks D are connected, or when the distance between the two terminal blocks is long and the intermediate portion of the shunt wire 1 ″ needs to be supported. I do.
Even when the components are changed as described above, the above-described effects can be obtained.

Still another embodiment of the present invention will be described with reference to FIG. A flexible conductor 10 ′ of still another embodiment is composed of four stranded conductors 100, both ends of which are united by a terminal 20, while the middle part is branched into two systems, and each system has two stranded conductors. The wire conductor 100 is bound at the intermediate terminal 30. As a result, a shunt wire 1 ″ ″ in which the flexible conductor 10 ′ is branched into two systems is obtained.
Even when the components are changed as described above, the above-described effects can be obtained.

1 Shunt wire 10 Flexible conductor 100 Twisted wire conductor 20 Terminal (copper tube material)
200 body part 210 skirt part 220 screw hole D terminal block B screw 30 intermediate terminal

Claims (5)

A shunt wire provided with conductive terminals at both ends of a flexible conductor, wherein the flexible conductor is composed of a combination of two or more stranded conductors having different lengths, and the combination of the stranded conductors is sequentially elongated from an end. A shunt wire that is unique. The shunt wire according to claim 1, wherein the combined stranded conductors are adjusted to have different lengths so that the flexible conductor bends at about 90 degrees on the same plane. A shunt wire characterized in that two or more layers of the flexible conductor according to claim 2 are stacked in the thickness direction. 4. The shunt wire according to claim 1, wherein the terminal includes a main body connected to the stranded conductor, and the main body includes a skirt at an end to which the stranded conductor is connected. 5. . 5. The shunt wire according to claim 4, wherein the shunt wire has a conductive terminal at an intermediate portion.

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