Aluminum electric wire and wire harness

Abstract

An aluminum electric wire (1) includes a conductor (10) and an insulator (20). The conductor (10) is configured from a center stranded wire (11) and a plurality of outer peripheral stranded wires (12) laminated in two or more layers on the outer periphery of the center stranded wire. The center stranded wire (11) and the outer peripheral stranded wire (12) are formed by stranding single wires made of pure aluminum. The single wire diameter of each single wire is at least 0.21 mm and less than 1.0 mm. The adhesive force between the conductor (10) and the insulator (20) is 6-45 N. The thickness of the insulator (20) ranges from 0.72 mm to 1.80 mm.

Description

Technical Field

[0001] The present invention relates to an aluminum wire and a wire harness. Background Art

[0002] In the prior art, aluminum wires in which the outer periphery of an aluminum conductor is coated with an insulator have been proposed (for example, see Patent Documents 1 to 3). In these aluminum wires, the insulator uses a specific material to improve flexibility.

[0003] Citation List

[0004] Patent Documents

[0005] Patent Document 1: JP2012 - 99412A

[0006] Patent Document 2: JP2012 - 104227A

[0007] Patent Document 3: JP2019 - 179628A Summary of the Invention

[0008] Technical Problem

[0009] The flexibility of a wire is determined by the sum of various factors such as the material of the conductor, the single - wire diameter and stranding structure, the material and thickness of the insulator, and the adhesion state between the conductor and the insulator. Therefore, there is room for improvement in the flexibility of the wires described in Patent Documents 1 to 3.

[0010] Copper wires are less likely to have a tendency to bend the conductor, and the bending R of the wire increases during wiring. Therefore, when laying copper wires, protectors or clamps are used to adjust the route to prevent interference with equipment, wires, etc. On the other hand, aluminum wires are more likely to have a bending tendency than copper wires. However, even aluminum wires still have insufficient formability and require route adjustment by clamps or the like.

[0011] The present invention is proposed to solve the above problems in the prior art. One object of the present invention is to provide an aluminum wire and a wire harness capable of improving flexibility and formability.

[0012] Solution to the Problem

[0013] An aluminum wire according to an embodiment of the present invention is an aluminum wire, comprising: a conductor; and an insulator covering the conductor, wherein the conductor includes a central stranded wire and a plurality of outer stranded wires laminated in two or more layers on the outer periphery of the central stranded wire, wherein the central stranded wire and the outer stranded wires are formed by stranding single wires made of pure aluminum, wherein the single wires each have a single wire diameter of 0.21 mm or more and less than 1.0 mm, wherein the adhesion between the conductor and the insulator is 6 N or more and 45 N or less, and wherein the thickness of the insulator is 0.72 mm or more and 1.80 mm or less.

[0014] A wire harness according to an embodiment of the present invention includes the above aluminum wire.

[0015] Advantageous effects of the invention

[0016] According to the present invention, it is possible to provide an aluminum wire and a wire harness capable of improving flexibility and formability. Description of the drawings

[0017] Figure 1 Figure 1 is a perspective view showing an embodiment of a wire harness including an aluminum wire according to an embodiment of the present invention.

[0018] Figure 2 Figure 2 is a cross-sectional view showing an example of the aluminum wire shown Figure 1 in.

[0019] Figure 3 Figure 3 is a cross-sectional view showing an example of a partial structure of the aluminum wire shown Figure 2 in.

[0020] Figure 4 Figure 4 is a first table showing examples and comparative examples.

[0021] Figure 5 Figure 5 is a second table showing examples and comparative examples.

[0022] Figure 6A Figure 6A is a schematic diagram showing a method for measuring adhesion and showing a sample for measuring adhesion.

[0023] Figure 6B Figure 6B is a schematic diagram showing a method for measuring adhesion and showing a method for measuring adhesion.

[0024] Figure 7 Figure 7 is a conceptual diagram showing a case of a flexibility test.​​​​​​​​​​​​​​​​

[0025] Figure 8 Figure 8 is a table showing the results of a formability test.

[0026] Figure 9 Figure 9 is a table showing the comparison results between the aluminum wire according to Example 3 and the copper wire according to Comparative Example 10. DETAILED DESCRIPTION

[0027] Hereinafter, the present invention will be described with reference to preferred embodiments. The present invention is not limited to the embodiments described below, and the embodiments can be appropriately changed without departing from the gist of the present invention. In the embodiments to be described below, there may be parts where illustration and description of a part of the configuration are omitted. Needless to say, known or publicly known techniques are appropriately applied to the omitted technical details within the range not conflicting with the content to be described below.

[0028] Figure 1 is a perspective view showing an example of a wire harness including an aluminum wire according to an embodiment of the present invention. As Figure 1 shown, the wire harness WH includes an aluminum wire 1 and another member O. The another member O is, for example, a connector O1 and a terminal O2. The another member O is not limited to the connector O1, the terminal O2, etc., and may also be another wire or the like.

[0029] Figure 2 is a cross-sectional view showing an example of the aluminum wire 1 Figure 1 shown, and Figure 3 is a cross-sectional view showing an example of a part of the configuration of the aluminum wire 1 Figure 2 shown. As Figure 2 shown, the aluminum wire 1 includes a conductor 10 and an insulator 20 covering the outer periphery of the conductor 10 in a contact state.

[0030] The conductor 10 includes a center strand 11 and a plurality of outer strands 12. The plurality of outer strands 12 are formed in two or more layers on the outer peripheral side of the center strand 11. It is assumed that the outer strands 12 are stranded around the center strand 11 in a bunch. Alternatively, the outer strands 12 are not limited to being stranded in a bunch and may also be concentrically stranded. As Figure 3 shown, the center strand 11 and the outer strands 12 are formed by stranding a plurality of single wires 11a and 12a made of pure aluminum.

[0031] Here, in the present embodiment, the single wire diameters of the plurality of single wires 11a and 12a constituting the center strand 11 and the outer strands 12 are 0.21 mm or more and less than 1.0 mm. This is because when the single wire diameter is less than 0.21 mm, the single wires 11a and 12b are too thin and easily break, and when the single wire diameter is 1.0 mm or more, the single wires 11a and 12a are too thick and the flexibility is impaired.​​​​

[0032] In this embodiment, the adhesive force between the conductor 10 and the insulator 20 is 6 N or more and 45 N or less. This is because when the adhesive force is less than 6 N, the conductor 10 and the insulator 20 are extremely likely to move independently when the wire is bent, and the formability is significantly reduced. In addition, this is because when the adhesive force exceeds 45 N, the adhesive force becomes too high, and it is difficult for the conductor 10 and the insulator 20 to move independently, acting like a single thick rod, which impairs the flexibility.

[0033] In addition, in this embodiment, the thickness of the insulator 20 is 0.72 mm or more and 1.80 mm or less. This is because when the thickness is less than 0.72 mm, the insulator 20 is too thin to ensure abrasion resistance. In addition, this is because when the thickness exceeds 1.80 mm, the insulator 20 becomes too thick to ensure flexibility.

[0034] In addition, in this embodiment, the insulator 20 is preferably made of cross-linked polyethylene. This is because when cross-linked polyethylene is used, it is possible to easily provide a heat resistance and cost balance, and the aluminum wire 1 with more excellent heat resistance and cost.

[0035] The cross-sectional area (size) of the conductor 10 is preferably 30 sq (square millimeters) or more and 230 sq or less. This is because when the cross-sectional area is less than 30 sq, the weight reduction effect is reduced compared to a copper wire of the same size. When the cross-sectional area exceeds 230 sq, the size becomes too large, for example, it is difficult to apply the conductor to a vehicle.

[0036] In addition, the pitch of the center strand 11 is preferably 15 times or more and 30 times or less (preferably 20 times) the stranding outer diameter, and the pitch of the outer strand 12 is preferably 8 times or more and 15 times or less (preferably 11 times) the outer diameter of the corresponding layer. Here, the corresponding layer is the first layer when the outer strand 12 belongs to the first layer, and the second layer when the outer strand 12 belongs to the second layer. That is, the pitch of the outer strand 12 of the first layer is preferably 8 times or more and 15 times or less the outer diameter of the first layer, and the pitch of the outer strand 12 of the second layer is preferably 8 times or more and 15 times or less the outer diameter of the second layer. This is because when these pitches are used, it is possible to help prevent wire breakage, strand loosening, and strand collapse.

[0037] Next, embodiments and comparative examples of the present invention will be described. Figure 4 and Figure 5 is a table showing the embodiments and comparative examples.

[0038] First, as Figure 4 and Figure 5As shown, all the single wires constituting the conductor in Example 1 are made of pure aluminum. In Example 1, the conductor size is 50 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 32 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 48.9 mm 2 , and the outer diameter is 10.0 mm. In Example 1, the insulator is made of cross-linked polyethylene (PE) with a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Example 1 is 13.0 mm. In addition, the result of measuring the adhesion force by the measurement method based on ISO19642 described later is that the adhesion force is 6 N.

[0039] The aluminum wire according to Example 2 is the same as the aluminum wire in Example 1 except that the adhesion force is 45 N.

[0040] In Example 3, all the single wires are made of pure aluminum. The conductor size is 95 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 62 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 94.7 mm 2 , and the outer diameter is 13.9 mm. In Example 3, the insulator is made of cross-linked PE with a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Example 3 is 16.9 mm. In addition, the adhesion force is 9 N.

[0041] On the other hand, all the single wires constituting the conductor in Comparative Example 1 are made of pure copper. In Comparative Example 1, the conductor size is 30 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 19 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 29.0 mm 2 , and the outer diameter is 7.8 mm. In Comparative Example 1, the insulator is made of cross-linked PE with a thickness of 1.30 mm. The outer diameter of the aluminum wire according to Comparative Example 1 is 10.4 mm. In addition, the adhesion force is 86 N.

[0042] All the single wires constituting the conductor in Comparative Example 2 are made of pure copper. In Comparative Example 2, the conductor size is 35 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 23 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 35.2 mm 2 , and the outer diameter is 8.4 mm. In Comparative Example 2, the insulator is made of cross-linked PE with a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 2 is 11.4 mm. In addition, the adhesion force is 95 N.

[0043] All the single wires constituting the conductor in Comparative Example 3 are made of pure copper. In Comparative Example 3, the conductor size is 40 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 26 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 39.7 mm 2, and the outer diameter is 9.1 mm. In Comparative Example 3, the insulator is made of crosslinked PE and has a thickness of 1.40 mm. The outer diameter of the wire according to Comparative Example 3 is 11.9 mm. In addition, the adhesive force is 110 N.

[0044] All the single wires constituting the conductor in Comparative Example 4 are made of pure aluminum. In Comparative Example 4, the conductor size is 50 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 83 secondary strands, and the single wire diameter is 0.20 mm. The cross-sectional area of this conductor is 50.6 mm 2 , and the outer diameter is 9.9 mm. In Comparative Example 4, the insulator is made of crosslinked PE and has a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 4 is 12.9 mm. This aluminum wire breaks during manufacturing and is not feasible as a product, and the adhesive force etc. were not measured.

[0045] All the single wires constituting the conductor in Comparative Example 5 are made of pure aluminum. In Comparative Example 5, the conductor size is 50 sq, the central stranded wire and the outer peripheral stranded wire have 19 main strands and 32 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 48.9 mm 2 , and the outer diameter is 10.0 mm. In Comparative Example 5, the insulator is made of crosslinked PE and has a thickness of 0.50 mm. The outer diameter of the aluminum wire according to Comparative Example 5 is 11.0 mm. In this aluminum wire, the thickness of the insulator is too small to ensure abrasion resistance, and the coating thickness is unstable, so this aluminum wire is not feasible as a product. Therefore, in Comparative Example 5, the adhesive force etc. were not measured.

[0046] In Comparative Example 6, the conductor is the same as that in Comparative Example 5. In Comparative Example 6, the insulator is made of crosslinked PE and has a thickness of 0.72 mm. The outer diameter of the aluminum wire according to Comparative Example 6 is 11.4 mm. The adhesive force is 5 N.

[0047] In Comparative Example 7, the conductor is the same as that in Comparative Example 5. In Comparative Example 7, the insulator is made of crosslinked PE and has a thickness of 1.80 mm. The outer diameter of the aluminum wire according to Comparative Example 7 is 13.6 mm. The adhesive force is 52 N.

[0048] All the single wires constituting the conductor in Comparative Example 8 are made of pure aluminum. In Comparative Example 8, the conductor size is 50 sq, and the stranded wire is achieved by stranding 61 single wires with a single wire diameter of 1.0 mm. The cross-sectional area of this conductor is 47.9 mm 2 , and the outer diameter is 9.0 mm. In Comparative Example 8, the insulator is made of crosslinked PE and has a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 8 is 12.0 mm. In addition, the adhesive force is 28 N.

[0049] All single wires constituting the conductor in Comparative Example 9 are made of pure aluminum. In Comparative Example 9, the conductor size is 50 sq, the central stranding and the outer peripheral stranding have 19 main strands and 13 secondary strands, and the single wire diameter is 0.5 mm. The cross-sectional area of this conductor is 48.5 mm 2 , and the outer diameter is 9.4 mm. In Comparative Example 9, the insulator is made of cross-linked PE and has a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 9 is 12.4 mm. In addition, the adhesive force is 200 N.

[0050] All single wires constituting the conductor in Comparative Example 10 are made of pure copper. In Comparative Example 10, the conductor size is 70 sq, the central stranding and the outer peripheral stranding have 19 main strands and 46 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 70.3 mm 2 , and the outer diameter is 12.0 mm. In Comparative Example 10, the insulator is made of cross-linked PE and has a thickness of 1.50 mm. The outer diameter of the wire according to Comparative Example 10 is 15.0 mm. In addition, the adhesive force is 120 N.

[0051] All single wires constituting the conductor in Comparative Example 11 are made of pure aluminum. In Comparative Example 11, the conductor size is 95 sq, the central stranding and the outer peripheral stranding have 19 main strands and 25 secondary strands, and the single wire diameter is 0.5 mm. The cross-sectional area of this conductor is 93.2 mm 2 , and the outer diameter is 12.9 mm. In Comparative Example 11, the insulator is made of cross-linked PE and has a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 11 is 15.9 mm. In addition, the adhesive force is 55 N.

[0052] All single wires constituting the conductor in Comparative Example 12 are made of aluminum alloy. In Comparative Example 12, the conductor size is 50 sq, the central stranding and the outer peripheral stranding have 19 main strands and 32 secondary strands, and the single wire diameter is 0.32 mm. The cross-sectional area of this conductor is 48.9 mm 2 , and the outer diameter is 10.0 mm. In Comparative Example 12, the insulator is made of cross-linked PE and has a thickness of 1.50 mm. The outer diameter of the aluminum wire according to Comparative Example 12 is 13.0 mm. In addition, the adhesive force is 54 N.

[0053] The adhesive force is measured as follows. Figure 6A is a schematic diagram showing the method for measuring the adhesive force and shows the sample for measuring the adhesive force. Figure 6B is a schematic diagram showing the method for measuring the adhesive force and shows the method for measuring the adhesive force.

[0054] When measuring the adhesive force, first, as Figure 6AAs shown, strip 25 mm of insulation from one end of a wire with a total length of 75 mm to expose the conductor. Then, as Figure 6B shown, insert the conductor into a hole in a plate with a diameter of the conductor outer diameter + 0.1 mm, and pull the conductor out from the insertion side at a speed of 200 mm / min. Define the force (maximum value) when pulling out the conductor until the conductor separates from the insulation as the adhesion force.

[0055] Perform flexibility tests on the wires according to Examples 1 to 3 and Comparative Examples 1 to 12 above, and perform formability tests on the wires according to Examples 1 to 3 and Comparative Examples 2 and 6.

[0056] Figure 7 is a conceptual diagram showing the state of the flexibility test. For the flexibility test, use a 400 mm wire with insulation coated on the conductor as a sample. Then, as Figure 7 shown, fix the other end of the sample, apply a load from one end, and record the load when the sample is bent 180 degrees as the flexibility.

[0057] Figure 8 is a table showing the results of the formability test. In the formability test, as Figure 8 shown, wind the wire around cylinders with diameters of φ75 and φ50, fix it with a cable tie or the like, leave it for one minute, and then loosen the fixing part. At this time, evaluate the degree of unwinding of the wire. Regarding Figure 4 and Figure 5 in the evaluation, when the degree of unwinding of the wire on the line passing through the center of the cylinder (see the dashed line in Figure 8 ) is 75 mm or more, the formability is rated as "×", and when the degree of unwinding of the wire is less than 75 mm, the formability is rated as "○". The reason for using cylinders with diameters of φ75 and φ50 is to confirm the formability when the diameter is about five times the wire diameter.

[0058] As Figure 4 and Figure 5 shown, in Examples 1 to 3, the flexibility is 7 N or more and 11 N or less, and excellent flexibility results are obtained. Similarly, excellent flexibility results are also obtained in Comparative Examples 1, 2, and 6. In particular, it is found that although the aluminum wires according to Examples 1 to 3 are thicker than the copper wires according to Comparative Examples 1 and 2, they can exhibit the same degree of flexibility. On the other hand, in Comparative Examples 3 and 7 to 12, the flexibility exceeds 11 N and does not reach the flexibility in Examples 1 to 3. Comparative Examples 4 and 5 are not feasible as products, and the flexibility is not measured.

[0059] As Figure 4 、 Figure 5 and Figure 8 shown, in Examples 1 to 3 ( Figure 8In Example 3 (which is omitted), the spread of the aluminum wire is less than 75 mm, and the formability is good, that is, the wire does not require route adjustment by a protector or a clamp. On the other hand, in Comparative Examples 2 and 6 ( Figure 8 in which Comparative Example 2 is omitted), the spread of the wire is 75 mm or more, and route adjustment is required.

[0060] In summary, it was found that the aluminum wires according to Examples 1 to 3 can improve flexibility and formability.

[0061] The outer diameter of the aluminum wire according to this embodiment is not so large compared with that of the copper wire, and the weight can also be significantly reduced. Figure 9 is a table showing the comparison results between the aluminum wire according to Example 3 and the copper wire according to Comparative Example 10. When the ambient temperature is 105 °C and a current of 250 A is continuously applied, as Figure 9 shown, the maximum temperature of the conductor of the aluminum wire according to Example 3 is 136.9 °C, and the maximum temperature of the conductor of the copper wire according to Comparative Example 10 is 137.2 °C. That is, both reach approximately the same temperature.

[0062] Here, when comparing the wire outer diameters, the aluminum wire according to Example 3 is 16.9 mm, and the copper wire according to Comparative Example 10 is 15.0 mm. That is, the outer diameter of the aluminum wire according to Example 3 is about 113.5% of that of the copper wire according to Comparative Example 10, and there is not much difference between the two.

[0063] On the other hand, when comparing the weights, the aluminum wire according to Example 3 is 288.5 g / m, and the copper wire according to Comparative Example 10 is 731.3 g / m. That is, the weight of the aluminum wire according to Example 3 is reduced by about 60.6% relative to the copper wire according to Comparative Example 10.

[0064] Thus, according to the aluminum wire 1 and the wire harness WH in this embodiment, the conductor 10 not only includes the central stranded wire 11 and the outer peripheral stranded wire 12 formed by stranding the single wires 11a and 12a, but also has a single wire diameter of less than 1.0 mm. Therefore, the situation where the single wires 11a and 12b become too thick and the flexibility of the aluminum wire 1 is impaired is prevented. Since the wire diameter is 0.21 mm or more, the possibility of wire breakage when bending the wire is also reduced.

[0065] In addition, since the adhesion force between the conductor 10 and the insulator 20 is 6 N or more, a certain degree of adhesion force is ensured, the conductor 10 and the insulator 20 are less likely to move independently, and the deterioration of formability due to independent movement is prevented. Since the adhesion force between the conductor 10 and the insulator 20 is 45 N or less, the deterioration of flexibility when the thick object is bent by integrating the conductor 10 and the insulator 20 is prevented.

[0066] In addition, since the thickness of the insulator 20 is 0.72 mm or more and 1.80 mm or less, the insulator 20 is prevented from being too thin to ensure wear resistance, or from being too thick to reduce flexibility.

[0067] Therefore, it is possible to provide the aluminum wire 1 and the wire harness WH that can improve flexibility and formability.

[0068] Since the insulator 20 is crosslinked polyethylene, heat resistance and cost can be balanced, and the aluminum wire 1 with excellent heat resistance and cost can be provided.

[0069] Since the cross-sectional area of the conductor 10 is 30 sq or more, the weight reduction effect can be improved to a certain extent compared with a copper wire of the same size. And since the cross-sectional area of the conductor 10 is 230 sq or less, the size of the conductor 10 is not too large, and it can be easily applied to, for example, vehicles.

[0070] The pitch of the center strand 11 is 15 times or more and 30 times or less of the stranded outer diameter, and the pitch of the outer strand 12 is 8 times or more and 15 times or less of the stranded outer diameter. Therefore, the possibility of exceeding the processing limit is greatly reduced, and it helps to prevent the occurrence of wire breakage, strand loosening, and strand collapse.

[0071] Although the present invention has been described based on the embodiments above, the present invention is not limited to the above embodiments, and can be modified without departing from the gist of the present invention, and well-known or publicly known technologies can be appropriately combined.

[0072] For example, in the wire harness WH according to the present embodiment, the connector O1 and the terminal O2 are shown as examples of other members O, but the other members O are not particularly limited thereto, and can be, for example, the same type of aluminum wire 1 or the like.

[0073] The features of the embodiments of the present invention will be briefly summarized and listed below. [1]

[0075] An aluminum wire (1) comprising:

[0076] A conductor (10); and

[0077] An insulator (20) covering the conductor (10),

[0078] wherein the conductor (10) includes a center strand (11) and a plurality of outer strands (12) laminated in two or more layers on the outer periphery of the center strand,

[0079] wherein the center strand (11) and the outer strands (12) are formed by stranding single wires (11a, 12a) made of pure aluminum,

[0080] Among them, the single wires (11a, 12a) each have a single wire diameter of 0.21 mm or more and less than 1.0 mm.

[0081] Among them, the adhesion force between the conductor (10) and the insulator (20) is 6 N or more and 45 N or less, and

[0082] Among them, the thickness of the insulator (20) is 0.72 mm or more and 1.80 mm or less. [2]

[0084] The aluminum wire (1) according to [1] above,

[0085] Among them, the insulator (20) is cross-linked polyethylene. [3]

[0087] The aluminum wire (1) according to [1] above,

[0088] Among them, the cross-sectional area of the conductor (10) is 30 sq or more and 230 sq or less. [4]

[0090] The aluminum wire (1) according to [1] above,

[0091] Among them, in the conductor (10), the pitch of the central strand (11) is 15 times or more and 30 times or less of the stranded outer diameter, and the pitch of the outer peripheral strand (12) is 8 times or more and 15 times or less of the outer diameter of the corresponding layer. [5]

[0093] A wire harness (WH), comprising:

[0094] The aluminum wire (1) according to any one of [1] to [4] above.

[0095] Although the present invention has been described in detail with reference to specific embodiments, those skilled in the art can obviously make various changes and modifications without departing from the gist and scope of the present invention.

[0096] This application is based on a Japanese patent application (Japanese Patent Application No. 2023-57192) filed on March 31, 2023, the content of which is incorporated herein by reference.

[0097] Industrial Applicability

[0098] According to the present invention, it is possible to provide an aluminum wire and a wire harness that can improve flexibility and formability. The present invention having such an effect is useful for aluminum wires and wire harnesses.

[0099] List of Reference Signs

[0100] 1: Aluminum wire

[0101] 10: Conductor

[0102] 11: Central strand

[0103] 12: Outer peripheral strand

[0104] 11a, 12a: Single wire

[0105] 20: Insulator

[0106] O: Other components

[0107] WH: Wire harness

Claims

1. An aluminum electric wire, comprising: conductor; as well as an insulator covering the conductor, wherein The conductor includes a central stranded wire and a plurality of peripheral stranded wires stacked in two or more layers on the periphery of the central stranded wire. The central stranded wire and the peripheral stranded wire are formed by stranding single wires made of pure aluminum, The single wires each have a single wire diameter of not less than 0.21 mm and less than 1.0 mm, The bonding force between the conductor and the insulator is 6N or more and 45N or less, and The thickness of the insulator is greater than or equal to 0.72 mm and less than or equal to 1.80 mm.

2. The aluminum electric wire according to claim 1, in, The insulator is cross-linked polyethylene.

3. The aluminum electric wire according to claim 1, in, The cross-sectional area of ​​the conductor is greater than or equal to 30 sq and less than or equal to 230 sq.

4. The aluminum electric wire according to claim 1, in, In the conductor, the lay length of the central strand is 15 to 30 times the stranded outer diameter, and the lay length of the peripheral strand is 8 to 15 times the outer diameter of the corresponding layer.

5. A wiring harness comprising: The aluminum electric wire according to any one of claims 1 to 4.

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