Conductor connection structure

Abstract

The present invention provides a conductor connection structure that can enhance the conductivity of the joint even when two different conductors are joined together. [Solution] The conductor connection structure 1 comprises a first conductor 2 having a plate-shaped conductor portion 20 at its end, and a second conductor 3 having a plate-shaped conductor portion 30 at its end. The width and thickness dimensions at the end of the conductor portion of the first conductor are approximately the same as the width and thickness dimensions at the end of the conductor portion of the second conductor. The end face of the conductor portion of the first conductor and the end face of the conductor portion of the second conductor are joined by a joint portion 4, and the ends of the conductor portion of the first conductor and the ends of the conductor portion of the second conductor are not joined in a stacked state in the thickness direction. When the first and second conductors are viewed in plan, the total wire length W1 of the joint portion is 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion of the first conductor and the width dimension W3 at the end of the conductor portion of the second conductor.

Description

Technical Field

[0001] The present invention relates to a conductor connection structure.

Background Art

[0002] Automobiles are equipped with a variety of electronic devices. Further, in order to transmit power, control signals, etc. to the electronic devices, wire harnesses are routed. A wire harness includes a plurality of electric wires and connectors, and is connected to an electronic device or another wire harness by fitting the connectors to the connectors of the electronic device or another wire harness.

[0003] Generally, a wire with a terminal (a wire with a conductor) that constitutes such a wire harness includes an electric wire and a terminal fitting (conductor) attached to the end of the electric wire (see Patent Document 1).

[0004] Patent Document 1 discloses a wire with a terminal including an electric wire in which a conductor portion made of a material mainly composed of a first metal is covered with an insulating material, and a terminal made of a material mainly composed of a second metal different from the first metal and connected to the conductor portion exposed at one end of the electric wire. In the wire with a terminal, further, an alloy layer containing the first metal and the second metal is formed across the conductor portion and the terminal on the entire outer peripheral edge of the contact portion between the conductor portion and the terminal. Specifically, in a state where the conductor portion including a plurality of strands and the terminal are abutted, the contact portion between the conductor portion and the terminal is joined by a laser welder. The joint portion between the conductor portion and the terminal thus formed becomes an alloy layer, and the conductor portion and the terminal are in a conductive state and firmly joined.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In Patent Document 1, a plate-shaped terminal and a roughly rectangular conductor are joined together by butting them. Therefore, in order to ensure electrical conductivity between the terminal and the conductor, it is necessary to melt the entire butted portion. However, if the plate-shaped terminal and the conductor of the wire are made of different metals, the electrical conductivity of each metal is different, so even if the entire butted portion is melted, there is a possibility that the electrical conductivity between the terminal and the conductor of the wire will be insufficient.

[0007] This invention has been made in view of the problems of the prior art. The object of this invention is to provide a conductor connection structure that can improve the conductivity of the joint even when two different conductors are joined together. [Means for solving the problem]

[0008] A conductor connection structure according to an aspect of the present invention comprises a first conductor having a plate-shaped conductor portion at its end, and a second conductor having a plate-shaped conductor portion at its end. The width and thickness dimensions at the end of the conductor portion of the first conductor are substantially the same as the width and thickness dimensions at the end of the conductor portion of the second conductor, respectively. The end face of the conductor portion of the first conductor and the end face of the conductor portion of the second conductor are joined by a joint, and the end of the conductor portion of the first conductor and the end of the conductor portion of the second conductor are not joined in a stacked state in the thickness direction. When the first conductor and the second conductor are viewed in plan, the total length of the joint is 1.7 times or more the shorter of the width dimensions at the end of the conductor portion of the first conductor and the width dimensions at the end of the conductor portion of the second conductor. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a conductor connection structure that can improve the conductivity of the joint even when two different conductors are joined together. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic perspective view showing an example of a conductor connection structure according to this embodiment. [Figure 2] This is a schematic plan view showing another example of the conductor connection structure according to this embodiment. [Figure 3] This is a schematic plan view showing another example of the conductor connection structure according to this embodiment. [Figure 4] This is a schematic perspective view showing another example of the conductor connection structure according to this embodiment. [Figure 5] This is a schematic diagram illustrating the manufacturing method of the conductor connection structure according to this embodiment. [Figure 6] This is a schematic perspective view illustrating why the total wire length of the joint is at least 1.7 times the shorter of the width dimension at the end of the conductor portion of the first conductor and the width dimension at the end of the conductor portion of the second conductor. [Modes for carrying out the invention]

[0011] The conductor connection structure according to this embodiment will be described in detail below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from the actual ratios.

[0012] As shown in Figure 1, the conductor connection structure 1 according to this embodiment comprises a first conductor 2 having a conductor portion 20 with a plate-shaped end, and a second conductor 3 having a conductor portion 30 with a plate-shaped end. In this specification and drawings, the direction in which the first conductor 2 and the second conductor 3 are aligned is indicated by arrow Y, the direction perpendicular to arrow Y (up and down direction) is indicated by arrow Z, and the direction perpendicular to both arrow Y and arrow Z (left and right direction) is indicated by arrow X.

[0013] The first conductor 2 comprises a conductive portion 20 made of a conductive metal and an insulating coating layer 21 covering the periphery of the conductive portion 20. The conductive portion 20 is a member in which at least its ends are plate-shaped. The insulating coating layer 21 is formed from a flexible and electrically insulating resin material. At one end of the first conductor 2, the insulating coating layer 21 is removed, exposing the end of the conductive portion 20. As such a first conductor 2, for example, a busbar or a terminal can be used.

[0014] The second conductor 3 also comprises a conductive portion 30 made of a conductive metal and an insulating coating layer 31 covering the conductor portion 30. The conductive portion 30 is a member in which at least its ends are plate-shaped. The insulating coating layer 31 is formed from a flexible and electrically insulating resin material. In the second conductor 3 as well, the insulating coating layer 31 is removed at one end, exposing the end of the conductive portion 30. For example, a busbar or a terminal can be used as such a second conductor 3.

[0015] The conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 are formed by processing a plate material made of a conductive metal material. The conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 may be made of a single layer of metal plate, or they may be made of a laminated plate made by stacking multiple thin metal plates.

[0016] The conductive metal material constituting the conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 is not particularly limited, but for example, copper, copper alloy, aluminum, or aluminum alloy can be used. Specifically, both the conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 can be made of aluminum or an aluminum alloy. Alternatively, both the conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 can be made of copper or a copper alloy. Furthermore, one of the conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 can be made of copper or a copper alloy, and the other of the conductive portion 20 of the first conductor 2 and the conductive portion 30 of the second conductor 3 can be made of aluminum or an aluminum alloy.

[0017] The thickness dimension along the Z direction in the conductor portion 20 of the first conductor 2 is substantially the same as the thickness dimension along the Z direction in the conductor portion 30 of the second conductor 3. The thickness dimension of the conductor portion 20 of the first conductor 2 is preferably within ±30% of the thickness dimension of the conductor portion 30 of the second conductor 3. The thickness dimensions of the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 are not particularly limited, but can be, for example, 3 mm to 6 mm.

[0018] The width dimension along the X direction in the conductor portion 20 of the first conductor 2 is substantially the same as the width dimension along the X direction in the conductor portion 30 of the second conductor 3. The width dimension of the conductor portion 20 of the first conductor 2 is preferably within ±30% of the width dimension of the conductor portion 30 of the second conductor 3.

[0019] Note that the first conductor 2 and the second conductor 3 may be formed with leaf springs, protrusions, through holes, etc. for suppressing detachment when inserted into a connector or the like.

[0020] The conductor portion 20 of the first conductor 2 has a convex portion 201 that protrudes toward the conductor portion 30 of the second conductor 3. The convex portion 201 has a substantially triangular shape in plan view. Further, the conductor portion 30 of the second conductor 3 has a concave portion 301 along the shape of the convex portion 201. The concave portion 301 has a substantially triangular shape in plan view. Therefore, the convex portion 201 in the conductor portion 20 of the first conductor 2 has a structure that meshes with the concave portion 301 in the conductor portion 30 of the second conductor 3.

[0021] Then, in a state where the end face of the convex portion 201 in the conductor portion 20 of the first conductor 2 and the end face of the concave portion 301 in the conductor portion 30 of the second conductor 3 are abutted, the joint portion 4 is formed by joining the interface between the convex portion 201 and the concave portion 301. The joint portion 4 is formed from the front surface to the back surface of the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 in the Z direction, which is the thickness direction. Also, the joint portion 4 is formed from one end to the other end of the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 in the X direction, which is the width direction.

[0022] Here, when the first conductor 2 and the second conductor 3 are viewed in plan view, the total line length W1 of the joint portion 4 is 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3. When the line length W1 is 1.7 times or more longer than the shorter of the width dimension W2 and the width dimension W3, the conductive area between the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 increases, so that the conductivity of the joint portion 4 can be enhanced.

[0023] Specifically, the electrical conductivity (IACS) of aluminum is 61.7% with respect to copper. Therefore, when the conductor portion of the first conductor is made of copper and the conductor portion of the second conductor is made of aluminum, when trying to pass electricity in the same way between the conductor portion of the first conductor and the conductor portion of the second conductor, the area of the end face of the conductor portion of the second conductor needs to be 1.7 times the area of the end face of the conductor portion of the first conductor. And, if, as shown in Fig. 6(a), the end faces of the conductor portion 20a of the first conductor 2 and the end face of the conductor portion 30a of the second conductor 3 are flat, even if the end face of the conductor portion 20a and the end face of the conductor portion 30a are abutted and joined with a joint efficiency of 100%, only 61.7% of the area of the end face of the conductor portion 30a is joined to the end face of the conductor portion 20a. That is, as shown in Fig. 6(b), the portion marked with symbol A at the end face of the conductor portion 30a of the second conductor 3 is not in contact with the conductor portion 20a of the first conductor 2. Therefore, in the joint portion between the conductor portion 20a of the first conductor 2 and the conductor portion 30a of the second conductor 3, there is concern about deterioration in electrical and mechanical performance.

[0024] In contrast, in the conductor connection structure 1 of this embodiment, the total wire length W1 of the joint 4 is 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3. Furthermore, the width dimension W2 and thickness dimension at the end of the conductor portion 20 of the first conductor 2 are approximately the same as the width dimension W3 and thickness dimension at the end of the conductor portion 30 of the second conductor 3. Therefore, even if the conductor portion 20 of the first conductor 2 is made of copper and the conductor portion 30 of the second conductor 3 is made of aluminum, the joint area between the conductor portion 20 and the conductor portion 30 is equivalent to the area of ​​the end face of the conductor portion 30, thus suppressing a decrease in electrical performance. In addition, because the joint area between the conductor portion 20 and the conductor portion 30 is equivalent to the area of ​​the end face of the conductor portion 30, the mechanical strength of the joint 4 between the conductor portion 20 and the conductor portion 30 can be increased.

[0025] Furthermore, if the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3 are the same, the total wire length W1 of the joint 4 is 1.7 times or more the width dimension W2 or W3.

[0026] In the conductor connection structure 1 of this embodiment, the total wire length W1 of the joint 4 only needs to be 1.7 times or more the shorter of the width dimensions W2 and W3. Therefore, the shape of the end of the conductor portion 20 of the first conductor 2 and the end of the conductor portion 30 of the second conductor 3 are not limited to the shape shown in Figure 1.

[0027] For example, in the conductor connection structure 1 shown in Figure 2, the conductor portion 20 of the first conductor 2 has multiple protrusions 202 that project toward the conductor portion 30 of the second conductor 3. Each protrusion 202 is approximately triangular in shape when viewed from above. Furthermore, the conductor portion 30 of the second conductor 3 has recesses 302 that conform to the shape of the multiple protrusions 202. Each recess 302 is approximately triangular in shape when viewed from above. Therefore, the multiple protrusions 202 of the conductor portion 20 of the first conductor 2 are structured to interlock with the multiple recesses 302 of the conductor portion 30 of the second conductor 3.

[0028] Then, by joining the interfaces between the protrusions 202 and the recesses 302 with the end faces of the multiple protrusions 202 on the conductor portion 20 of the first conductor 2 and the end faces of the multiple recesses 302 on the conductor portion 30 of the second conductor 3, the joint portion 4 can be formed. Even with such a structure, the total wire length W1 of the joint portion 4 can be made 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3.

[0029] Furthermore, as shown in Figure 1, when there is only one protrusion 201 on the conductor portion 20 of the first conductor 2, the protrusion length of the protrusion 201 in the Y direction needs to be somewhat long in order to make the wire length W1 of the joint 4 at least 1.7 times the shorter of the width dimensions W2 and W3. However, as shown in Figure 2, when there are multiple protrusions 201 on the conductor portion 20 of the first conductor 2, the protrusion length of the protrusions 201 in the Y direction can be short. Therefore, the protrusion length of the joint 4 in the Y direction can be shortened.

[0030] In the conductor connection structure 1 shown in Figure 3, the conductor portion 20 of the first conductor 2 has a convex portion 203 that protrudes toward the conductor portion 30 of the second conductor 3, and the conductor portion 30 of the second conductor 3 has a concave portion 303 that conforms to the shape of the convex portion 203. The conductor portion 20 of the first conductor 2 has a dovetail joint formed as the convex portion 203, which is approximately trapezoidal when viewed from above, and the conductor portion 30 of the second conductor 3 has a dovetail hole formed as the concave portion 303 that conforms to the shape of the dovetail joint. After fitting the convex portion 203 and the concave portion 303 together, the joint 4 can be formed by joining the interface between the convex portion 202 and the concave portion 302. With such a dovetail joint structure, the total wire length W1 of the joint 4 can be made 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3.

[0031] In the conductor connection structure 1 of this embodiment, the shapes of the first conductor 2 and the second conductor 3 are not particularly limited, as long as the shape of the end of the conductor portion is plate-shaped. For example, the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 may be hollow or solid. Also, at least one of the first conductor 2 and the second conductor 3 may be an electric wire.

[0032] Figure 4 shows a conductor connection structure 1 in which the first conductor is a wire 2A. In the conductor connection structure 1 of Figure 4, the wire 2A is a coated wire comprising a plurality of individual wires 20A which are the conductor portion, and an insulating coating layer 21A that covers the plurality of individual wires 20A. The individual wires 20A can be made of a conductive metal material such as copper, copper alloy, aluminum, or aluminum alloy. The insulating coating layer 21A is formed from a resin material that is flexible and electrically insulating. At one end of the wire 2A, the insulating coating layer 21A is removed, and a portion of the individual wires 20A is exposed.

[0033] The electric wire 2A is formed by shaping multiple exposed strands 20A and includes a core wire bundle 22 that is substantially rectangular in shape when viewed from above. The core wire bundle 22 corresponds to the end of the conductor portion 20 of the first conductor 2. An inclined surface 204A is formed between the multiple strands 20A, which are surrounded by an insulating coating layer 21A, and the core wire bundle 22.

[0034] The core wire bundle 22 of the electric wire 2A has a protrusion 201A that projects toward the conductor portion 30 of the second conductor 3. When viewed from above, the protrusion 201A is approximately triangular in shape. Furthermore, the conductor portion 30 of the second conductor 3 has a recess 301 that follows the shape of the protrusion 201A. When viewed from above, the recess 301 is also approximately triangular in shape. Therefore, the protrusion 201A in the core wire bundle 22 of the electric wire 2A is structured to interlock with the recess 301 in the conductor portion 30 of the second conductor 3.

[0035] Then, with the end face of the protrusion 201A in the core wire bundle 22 of the electric wire 2A and the end face of the recess 301 in the conductor portion 30 of the second conductor 3 butted together, the interface between the protrusion 201A and the recess 301 is joined to form the joint portion 4. In the Z direction, which is the thickness direction, the joint portion 4 is formed from the front surface to the back surface of the core wire bundle 22 of the electric wire 2A and the conductor portion 30 of the second conductor 3. In the X direction, which is the width direction, the joint portion 4 is formed from one end to the other of the core wire bundle 22 of the electric wire 2A and the conductor portion 30 of the second conductor 3. The joint portion 4 is made of an alloy of the metal constituting the strands 20A of the electric wire 2A and the metal constituting the conductor portion 30 of the second conductor 3.

[0036] Thus, in the conductor connection structure 1A of this embodiment, the first conductor 2 is made of a wire 2A having a core wire bundle 22 consisting of multiple strands 20A, and the end of the conductor portion 20 of the first conductor 2 can be made of the core wire bundle 22.

[0037] Next, a method for manufacturing the conductor connection structure 1 according to this embodiment will be described.

[0038] As shown in Figure 5(a), first, a first conductor 2 having a conductor portion 20 with a plate-shaped end and a second conductor 3 having a conductor portion 30 with a plate-shaped end are prepared.

[0039] Next, as shown in Figure 5(b), a convex portion 201 is formed by machining the end face 205 of the conductor portion 20 of the first conductor 2 into a convex shape. Also, a concave portion 301 is formed by machining the end face 305 of the conductor portion 30 of the second conductor 3 into a concave shape.

[0040] Then, as shown in Figure 5(c), the joint 4 is formed by joining the interface between the protrusion 201 and the recess 301 with the end face of the protrusion 201 on the conductor portion 20 of the first conductor 2 and the end face of the recess 301 on the conductor portion 30 of the second conductor 3, while the protrusion 201 and the recess 301 are butted together. The joining method is not particularly limited, but joining methods such as FSW (friction stir welding) and heat pressure welding can be used. Laser welding can also be used as a joining method. In the case of a dovetail joint structure as shown in Figure 3, the joint can also be formed by press-fitting the protrusion 201 on the conductor portion 20 of the first conductor 2 into the recess 301 on the conductor portion 30 of the second conductor 3.

[0041] This manufacturing method makes it possible to obtain a conductor connection structure 1 in which the total wire length W1 of the joint 4 is 1.7 times or more the shorter of the width dimensions W2 and W3. Furthermore, by making the shape of the end of the conductor portion 20 of the first conductor 2 and the end of the conductor portion 30 of the second conductor 3 plate-shaped, the convex portion 201 and concave portion 301 can be formed by press working, so that the convex portion 201 and concave portion 301 can be processed into a uniform shape.

[0042] As described above, the conductor connection structure 1 of this embodiment comprises a first conductor 2 having a conductor portion 20 with a plate-shaped end, and a second conductor 3 having a conductor portion 30 with a plate-shaped end. The width and thickness dimensions at the end of the conductor portion 20 of the first conductor 2 are approximately the same as the width and thickness dimensions at the end of the conductor portion 30 of the second conductor 3, respectively. The end face of the conductor portion 20 of the first conductor 2 and the end face of the conductor portion 30 of the second conductor 3 are joined by a joint 4, and the end of the conductor portion 20 of the first conductor 2 and the end of the conductor portion 30 of the second conductor 3 are not joined in a stacked state in the thickness direction. When the first conductor 2 and the second conductor 3 are viewed from above, the total wire length W1 of the joint 4 is 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3.

[0043] In the conductor connection structure 1, the total wire length W1 of the joint 4 is 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3. Therefore, since the joining area between the conductor portion 20 and the conductor portion 30 is equivalent to the area of ​​the end face of the conductor portion 30, it is possible to suppress a decrease in electrical performance. In addition, since the joining area between the conductor portion 20 and the conductor portion 30 is equivalent to the area of ​​the end face of the conductor portion 30, it is possible to increase the mechanical strength of the joint 4 between the conductor portion 20 and the conductor portion 30. As a result, it is possible to ensure the reliability of the joint 4 between the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3.

[0044] Furthermore, in the conductor connection structure 1, the end face of the conductor portion 20 of the first conductor 2 and the end face of the conductor portion 30 of the second conductor 3 are joined by a joint 4, and the end of the conductor portion 20 of the first conductor 2 and the end of the conductor portion 30 of the second conductor 3 are not joined in a stacked state in the thickness direction. Therefore, the thickness of the joint between the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 is reduced, making the conductor connection structure 1 low profile.

[0045] In the conductor connection structure 1 of this embodiment, it is preferable that at least one protrusion 201 is formed on one end of the conductor portion 20 of the first conductor 2 and on the other end of the conductor portion 30 of the second conductor 3, and that a recess 301 that engages with the protrusion 201 is formed on the other end of the conductor portion 20 of the first conductor 2 and on the other end of the conductor portion 30 of the second conductor 3. With this configuration, the total wire length W1 of the joint 4 can be made 1.7 times or more the shorter of the width dimension W2 at the end of the conductor portion 20 of the first conductor 2 and the width dimension W3 at the end of the conductor portion 30 of the second conductor 3. Figures 1 to 5 show a configuration in which a protrusion 201 is formed on the end of the conductor portion 20 of the first conductor 2 and a recess 301 is formed on the end of the conductor portion 30 of the second conductor 3. However, this embodiment is not limited to this configuration, and the above effects can also be obtained in a configuration in which a recess is formed at the end of the conductor portion 20 of the first conductor 2 and a convex portion is formed at the end of the conductor portion 30 of the second conductor 3.

[0046] In the conductor connection structure 1 of this embodiment, the first conductor 2 is an electric wire equipped with a core wire bundle 22 consisting of multiple strands 20A, and the end of the conductor portion 20 of the first conductor 2 may be made of the core wire bundle 22. As a result, when a terminal is used as the second conductor 3, an electric wire with a terminal can be obtained that has excellent conductivity and connection strength between the second conductor 3 and the first conductor 2.

[0047] In the conductor connection structure 1 of this embodiment, one of the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 may be made of copper or a copper alloy, while the other of the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 may be made of aluminum or an aluminum alloy. In the conductor connection structure 1, the joint area between the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3 is equal to the area of ​​the end face of the conductor portion 30 of the second conductor 3, so that a decrease in electrical performance between the first conductor 2 and the second conductor 3 can be suppressed. Therefore, even if the above metals are used for the conductor portion 20 of the first conductor 2 and the conductor portion 30 of the second conductor 3, good conductivity between them can be achieved.

[0048] Although this embodiment has been described above, this embodiment is not limited to these, and various modifications are possible within the scope of the gist of this embodiment. [Explanation of symbols]

[0049] 1.1A conductor connection structure 2 First conductor 2A wire 3. Second conductor 4 Joint 20 Conductor portion of the first conductor 20A stranded wire 22 Core wire bundle 30 Conductor portion of the second conductor 201, 201A, 202, 203 protrusions 301, 302, 303 recess W1 Total wire length of the joint W2 Width dimension at the end of the conductor portion of the first conductor W3 Width dimension at the end of the conductor portion of the second conductor

Claims

1. A first conductor having a conductive portion with a plate-shaped end, A second conductor having a conductive portion with a plate-shaped end, Equipped with, The width and thickness dimensions at the end of the conductor portion of the first conductor are approximately the same as the width and thickness dimensions at the end of the conductor portion of the second conductor, respectively. The end face of the conductor portion of the first conductor and the end face of the conductor portion of the second conductor are joined by a joint, and the end of the conductor portion of the first conductor and the end of the conductor portion of the second conductor are not joined in a stacked state in the thickness direction. A conductor connection structure in which, when the first conductor and the second conductor are viewed in plan, the total wire length of the joint is 1.7 times or more the shorter of the width dimension at the end of the conductor portion of the first conductor and the width dimension at the end of the conductor portion of the second conductor.

2. At least one protrusion is formed on one of the ends of the conducting portion of the first conductor and the conducting portion of the second conductor. The conductor connection structure according to claim 1, wherein a recess that engages with the convex portion is formed at the other end of the conductor portion of the first conductor and the other end of the conductor portion of the second conductor.

3. The conductor connection structure according to claim 1 or 2, wherein the first conductor is an electric wire having a bundle of core wires consisting of a plurality of strands, and the end of the conductor portion of the first conductor is made of the bundle of core wires.

4. The conductor connection structure according to claim 1 or 2, wherein one of the conductor portion of the first conductor and the conductor portion of the second conductor is made of copper or a copper alloy, and the other of the conductor portion of the first conductor and the conductor portion of the second conductor is made of aluminum or an aluminum alloy.

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