Laminated Conductor

Abstract

To provide a multilayer conductor which can suppress vibrations of a single-layer bus bar.SOLUTION: A multilayer conductor 1 includes: a conductor unit 2 formed by depositing a plurality of single-layer bus bars 11 using a band-like conductive member; and an intermediate joint unit 3 which joins the single-layer bus bars 11 in an intermediate region 22 between join end parts 21, 21 of the conductor unit 2. The intermediate joint unit 3 is formed in a position which sandwiches a bending part 23 bending in the conductor unit 2. Joining and binding the single-layer bus bars 11 by the intermediate joint unit 3 can suppress vibrations of the single-layer bus bars 11.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a laminated conductor. [Background technology]

[0002] Conventionally, a known laminated conductor is formed by stacking a plurality of single-layer bus bars (conductive plates), as described in, for example, Patent Document 1. This laminated conductor is formed by stacking a plurality of single-layer bus bars, which makes it highly flexible and easy to bend and route, resulting in good routing properties. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-21628 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned laminated conductor may generate vibrations, and there is room for improvement in this respect. For example, when a long laminated conductor is used, gaps may be formed between the single-layer busbars in the middle of the laminated conductor. In this case, when the laminated conductor is mounted on a vehicle, for example, the movement of the installation location may cause vibrations in the single-layer busbars.

[0005] Therefore, an object of the present invention is to provide a laminated conductor capable of suppressing vibration of a single-layer bus bar. [Means for solving the problem]

[0006] In other words, the laminated conductor of the present invention comprises a conductive portion formed by stacking a plurality of single-layer bus bars each having a strip-shaped conductive material, and an intermediate joint portion provided in an intermediate region between the ends of the conductive portion and joining the single-layer bus bars, the intermediate joint portion being configured to be formed at a position sandwiching the bent portion in the conductive portion. Effect of the Invention

[0007] According to the laminated conductor of the present invention, vibration of the single-layer bus bar can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a laminated electric conductor according to an embodiment before processing. [Diagram 2] FIG. 2 is a perspective view of the laminated electric conductor according to the embodiment after processing. [Diagram 3] FIG. 3 is an enlarged perspective view of the electrical conductor stack according to the embodiment. [Figure 4] FIG. 4 is an explanatory diagram of the vibration reducing function of the laminated conductor according to the embodiment. [Diagram 5] FIG. 5 is a diagram showing a vibration state of a laminated conductor serving as a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same.

[0010] [Embodiment] Fig. 1 is a perspective view of the laminated conductor according to the embodiment before processing, Fig. 2 is a perspective view of the laminated conductor according to the embodiment after processing, Fig. 3 is an enlarged perspective view of the laminated conductor according to the embodiment, Fig. 4 is an explanatory diagram of the vibration reduction function of the laminated conductor according to the embodiment, and Fig. 5 is a diagram showing the vibration state of a laminated conductor serving as a comparative example.

[0011] In the following description, among the first, second, and third directions that intersect with each other, the first direction is referred to as the "extension direction X", the second direction is referred to as the "width direction Y", and the third direction is referred to as the "thickness direction Z". Here, the extension direction X, the width direction Y, and the thickness direction Z are perpendicular to each other. The extension direction X is the longitudinal direction of the laminated conductor and corresponds to the direction in which the laminated conductor extends. The width direction Y corresponds to the width direction of the laminated conductor. The thickness direction Z corresponds to the thickness direction, stacking direction, or height direction of the laminated conductor. The width direction Y and the thickness direction Z correspond to the intersecting direction that intersects with the extension direction X. Furthermore, unless otherwise specified, each direction used in the following description represents a direction in a state in which each part is assembled with each other. Furthermore, the orthogonal here includes substantially orthogonal.

[0012] 1 and 2, the conductor stack 1 is a strip-shaped conductive member that, for example, constitutes a wiring portion of an electric circuit and functions as a power transmission path or a communication transmission path. The conductor stack 1 is mounted, for example, on a vehicle and used to electrically connect an object to which it is attached, such as an electric device 5 or a battery 6. Here, the electric device 5 includes a motor, an inverter, and a generator. The battery 6 includes not only a battery main body such as a battery pack, but also battery components installed in the battery, such as a battery stack, a battery module, and a battery cell.

[0013] The laminated conductor 1 is a conductor that is not provided with an insulating coating, and does not form an insulating coating that adheres closely to the surface. Note that a holding member or a protective member such as a protector may be attached to the laminated conductor 1 during use or installation.

[0014] The laminated conductor 1 includes a conductive portion 2 and an intermediate joint portion 3. The conductive portion 2 is a main body of the laminated conductor 1 and functions as a transmission path that conducts electricity. The conductive portion 2 is a belt-shaped plate body formed by stacking a plurality of single-layer busbars 11. The single-layer busbar 11 is a plate material made of a conductive material in a belt shape. The single-layer busbar 11 is formed with a small thickness relative to the length in the width direction Y and the extension direction X, and is configured to be flexible and deformable. Therefore, the conductive portion 2 in which a plurality of single-layer busbars 11 are stacked is also flexible and can be used after being deformed. In the conductive portion 2, the number of stacked single-layer busbars 11 is appropriately set depending on, for example, the value of the current flowing through the laminated conductor 1, the material constituting the single-layer busbar 11, or the deformed shape of the laminated conductor 1.

[0015] The conductive portion 2 has joint ends 21 at both ends. The joint ends 21 are ends of the conductive portion 2 and are formed at both ends of the conductive portion 2. The joint ends 21 are portions for attaching the laminated conductor 1 to an attachment target such as an electric device 5 or a battery 6, and are formed by joining the single-layer busbars 11. For example, the joint ends 21 join the single-layer busbars 11 together by welding, and restrain the single-layer busbars 11 so as not to come apart. The joint ends 21 also have attachment holes 21A formed therein. The attachment holes 21A are holes for attaching the laminated conductor 1 to an attachment target such as an electric device 5 or a battery 6, and are formed so as to penetrate the single-layer busbar 11 from the front to the back.

[0016] An intermediate joint 3 is formed in the conductive portion 2. The intermediate joint 3 is a portion that joins the single-layer busbar 11 in an intermediate region 22 of the conductive portion 2. The intermediate region 22 of the conductive portion 2 is a region between one end and the other end of the conductive portion 2, for example, a region between one joint end 21 and the other joint end 21. The intermediate joint 3 joins the single-layer busbars 11 to each other by, for example, welding, and restrains the single-layer busbar 11 from coming apart. The intermediate joint 3 is formed between two joint ends 21 formed at both ends of the conductive portion 2, and is a joint different from the joint ends 21. For example, as shown in FIG. 3, the length L1 of the intermediate joint 3 in the extension direction X is shorter than the length L2 of the joint ends 21. By shortening the length L1 of the intermediate joint 3, it is possible to make the conductive portion 2 easier to deform. The intermediate joint 3 may join the single-layer busbar 11 by a method other than welding.

[0017] In FIG. 3, the intermediate joints 3 are formed in the intermediate region 22 of the conductive portion 2 at positions sandwiching the bent portion 23. For example, two intermediate joints 3 are formed in the intermediate region 22 of the conductive portion 2 so as to sandwich the bent portion 23. The two intermediate joints 3 are formed, for example, at equal distances from the center positions of the bent portions. Here, equal distances include substantially equal distances. The distance between the intermediate joints 3 may be set taking into consideration the workability of the laminated conductor 1 and the vibration suppression of the single-layer busbar 11. For example, in the bent portion 23, the distance between the two intermediate joints 3 is set to be greater than the length of the conductive portion 2 in the width direction Y and less than five times the length of the width direction Y. That is, in the bent portion 23, if the distance between the two intermediate joints 3 is shorter than the length of the conductive portion 2 in the width direction Y, it becomes difficult to bend and process the conductive portion 2 during processing, and if the distance between the two intermediate joints 3 is longer than five times the length of the conductive portion 2 in the width direction Y, there is a risk that the single-layer busbar 11 will vibrate due to shaking after installation. For this reason, the intermediate joints 3 are installed at a distance from each other to such an extent that the single-layer busbar 11 does not vibrate. Depending on the installation environment of the laminated conductor 1, the distance between the two intermediate joints 3 may be set to be five times or more the length of the conductive portion 2 in the width direction Y. Also, as shown in FIG. 1, in the laminated conductor 1, it is not necessary to provide two intermediate joints 3 at the bent portion of the conductive portion 2. For example, when the conductive portion 2 is bent in an out-of-plane direction parallel to the front surface 24 and the back surface 25, the single-layer busbar 11 is unlikely to come apart, so two intermediate joints 3 may not be provided at such a bent portion.

[0018] The bent portion 23 is a bent portion in the conductive portion 2, and is a portion bent in an in-plane direction of a plane parallel to the front surface 24 and the back surface 25 of the conductive portion 2. Here, the bent portion 23 includes a curved or bent portion in the conductive portion 2. In FIG. 2, the in-plane direction of the plane parallel to the front surface 24 and the back surface 25 of the conductive portion 2 is, for example, an in-plane direction of a plane including the extension direction X and the width direction Y. Since the bent portion 23 of the conductive portion 2 is bent in the in-plane direction, a gap is likely to be formed between the single-layer busbars 11 due to distortion of the single-layer busbars 11, and the single-layer busbars 11 are likely to vibrate. However, in the laminated conductor 1, the intermediate joint portion 3 is formed at a position sandwiching the bent portion 23, so that the single-layer busbars 11 at the bent portion 23 are restrained. Therefore, even in the laminated conductor 1 having the bent portion 23, the vibration of the single-layer busbars 11 can be suppressed.

[0019] Next, the vibration suppressing function of the electrical conductor laminate 1 according to this embodiment will be described in detail.

[0020] As shown in Fig. 2, the laminated conductor 1 is processed into a wiring shape before being installed in a vehicle. That is, during processing, the laminated conductor 1 is deformed by being raised in the thickness direction Z or curved in an in-plane direction of a plane including the extension direction X and the width direction Y, depending on the shape or structure of the installation location of the vehicle. Such deformation during processing may cause stress in the laminated conductor 1, which may cause the single-layer busbars 11 constituting the laminated conductor 1 to come apart. That is, gaps may be generated between the single-layer busbars 11, causing the stacking state of the single-layer busbars 11 to be disturbed. In particular, bending in an in-plane direction of a plane parallel to the front surface 24 and the back surface 25 of the conductive portion 2 is likely to cause gaps between the single-layer busbars 11.

[0021] For this reason, an intermediate joint 3 is formed in the conductor stack 1 during processing. For example, the conductor stack 1 is welded as necessary at bent portions during processing to form intermediate joints 3. At bent portion 23 bent in the in-plane direction of conductive portion 2, intermediate joints 3 are provided to sandwich bent portion 23. Note that even at portions bent in the in-plane direction of conductive portion 2, intermediate joints 3 may not be provided at portions with small curvature.

[0022] In this manner, by providing the intermediate joints 3 in the laminated conductor 1, the single-layer busbar 11 is restrained and the single-layer busbar 11 is prevented from coming apart. This maintains the laminated state of the single-layer busbar 11. Furthermore, in the laminated conductor 1, the intermediate joints 3 are provided so as to sandwich the bent portions 23 at which the single-layer busbar 11 is likely to come apart. This makes it possible to appropriately prevent the single-layer busbar 11 from coming apart.

[0023] Such a laminated conductor 1 is installed in a vehicle by being wired. When the vehicle is traveling, the vibration of the vehicle is transmitted to the laminated conductor 1, causing it to vibrate. At this time, as shown in Fig. 4, the laminated conductor 1 has intermediate joints 3 provided to sandwich the bent portion 23, which prevents the single-layer busbar 11 from coming apart and keeps the laminated state of the single-layer busbar 11 intact.

[0024] Meanwhile, FIG. 5 shows a vibration state of a laminated conductor 100 as a comparative example. The laminated conductor 100 is a conductor that does not have an intermediate joint 3. In this laminated conductor 100, the single-layer busbar 11 vibrates greatly. That is, when the vibration of the vehicle is transmitted to the laminated conductor 100 while the vehicle is running and the laminated conductor 100 is swung, a gap is generated between the single-layer busbars 11, and the single-layer busbars 11 are allowed to move freely. Therefore, the single-layer busbars 11 vibrate. At this time, when the single-layer busbars 11 are put into a resonant state due to the shaking of the vehicle body, the single-layer busbars 11 vibrate greatly in the thickness direction Z. In addition, abnormal noise may occur due to the vibration of the single-layer busbars 11. In contrast, the laminated conductor 1 according to this embodiment is provided with the intermediate joint 3, and by joining and restraining the single-layer busbars 11, the vibration of the single-layer busbars 11 can be reliably suppressed, and the generation of abnormal noise due to the vibration of the single-layer busbars 11 can be suppressed.

[0025] As described above, the laminated conductor 1 according to this embodiment can appropriately suppress vibration of the single-layer busbar 11 by providing the intermediate joint portion 3 at a position sandwiching the bent portion 23 of the conductive portion 2.

[0026] Furthermore, in the laminated conductor 1 of this embodiment, when the conductive portion 2 has a bent portion 23 formed therein that bends in an in-plane direction of a surface parallel to the front surface 24 and the back surface 25, the vibration of the single-layer busbar 11 can be suppressed by providing an intermediate joint portion 3 so as to sandwich this bent portion 23.

[0027] Furthermore, in the electrical conductor laminate 1 according to this embodiment, the single-layer busbars 11 are joined at the intermediate joints 3 by welding, so that the single-layer busbars 11 can be reliably joined and restrained.

[0028] The conductor stack 1 according to this embodiment is connected to an electric device or a battery mounted on a vehicle for use. In this case, even if the conductor stack 1 is swung, the single-layer bus bar 11 can be prevented from vibrating.

[0029] Although the embodiment of the present invention has been illustrated above, the above embodiment is merely an example and is not intended to limit the scope of the invention. The above embodiment can be implemented in various other forms, and various omissions, substitutions, combinations, and modifications can be made without departing from the gist of the invention. In addition, the specifications of each configuration, shape, and the like (structure, type, direction, format, size, length, width, thickness, height, number, arrangement, position, material, etc.) can be appropriately changed and implemented.

[0030] For example, in the above-described embodiment, the case where the conductor stack 1 is mounted on a vehicle has been described, but the conductor stack 1 may be mounted on a moving object other than a vehicle, such as an aircraft, a ship, etc. Also, the conductor stack 1 may be used in products, devices, systems, etc. other than moving objects. [Explanation of symbols]

[0031] 1: Laminated conductor 2: Conductive part 3: Middle joint 5: Electrical equipment 6: Battery 11: Single layer busbar 21: Joint end (end) 22: Middle area 23: Bend 24: Surface 25: Back side X: Extending direction

Claims

1. a conductive portion formed by stacking a plurality of single-layer bus bars each having a strip-shaped conductive member; an intermediate joint portion provided in an intermediate region between the ends of the conductive portion and joining the single-layer bus bar, the intermediate joint portion is formed at a position sandwiching a bent portion at the conductive portion with respect to an extension direction of the conductive portion, the plurality of stacked single-layer bus bars are joined and restrained to each other at the intermediate joint portion, the plurality of stacked single-layer bus bars are not joined to each other between two intermediate joint portions formed at positions sandwiching the bent portion in the extending direction of the conductive portion, and the single-layer bus bars are relatively more likely to come apart than the intermediate joint portions. Laminated conductor.

2. The bent portion is bent in an in-plane direction parallel to the front and back surfaces of the conductive portion. The laminated conductor according to claim 1 .

3. The intermediate joint portion joins the single-layer busbar by welding. The laminated conductor according to claim 1 or 2.

4. Connected to an electrical device or battery installed in the vehicle; The laminated conductor according to claim 1 or 2.

5. The two intermediate joints are formed at the same distance from a central position of the bent portion. The laminated conductor according to claim 1 or 2.

6. The distance between the two intermediate joints is wider than the width of the conductive portion and shorter than five times the width of the conductive portion. The laminated conductor according to claim 1 or 2.

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