Electrically conductive cable and motor vehicle

Abstract

Electrically conductive cable (100) comprising several twisted strands (103), wherein the strands (103) each comprise several electrically conductive wires, wherein the cable (100) has two cable sections (301) and a decoupling section (300) arranged between the cable sections (301), wherein the cable (100) has a larger cross-sectional area in the decoupling section (300) than in the cable sections (301), wherein a damping element (400) is arranged in the decoupling section (300) and is surrounded by the strands (103).

Description

[0001] The invention relates to an electrically conductive cable according to the preamble of claim 1.

[0002] Such cables are known from the prior art. They are used, for example, in automotive engineering to power an electric drive. to connect to a power source. One disadvantage is that the cables also transmit unwanted sound.

[0003] CN 103354123 A therefore discloses a cable in which an elastic filler is used in a central area between the conductors. is arranged in a way that makes sound transmission more difficult.

[0004] In contrast, the invention is based on the objective of creating a cable that requires less installation space. Furthermore, it is intended that a A motor vehicle can be equipped with such a cable.

[0005] This problem is solved by a cable according to claim 1 and by a motor vehicle according to claim 10. Embodiments of the The invention is specified in the dependent claims.

[0006] The cable comprises several twisted strands. Each strand comprises several electrically conductive wires. Under the The expression "twisted together" is understood in this description to mean in particular that the strands are twisted along the longitudinal axis. the cable is wound around its longitudinal axis. It is possible that the relative position of the strands to each other does not change. Under the In this description, the term "electrically conductive" is understood to mean, in particular, that the wires have an electrical conductivity. exhibit a conductivity of more than 10⁷ S / m. The cable could, for example, be a high-voltage cable designed for voltages greater than 30 V and It is designed for power outputs greater than 80 kW.

[0007] The cable has two cable sections and a decoupling section arranged between the cable sections. The cable The decoupling section has a larger cross-sectional area than the cable sections. This reduces the acoustic conductivity. The cable's resistance in the decoupling sections is significantly reduced because the strands can be spaced further apart than in the rest of the cable. the cable sections. The elasticity of the cable is significantly increased in the decoupling section, so sound waves are conducted less effectively. Elasticity is increased because the individual strands exhibit greater flexibility due to their larger cross-sectional area. Furthermore, also move the strands relative to each other.

[0008] At the same time, no additional material is required in the cable sections. Therefore, no additional installation space is required in the cable sections. required. The electrical properties of the cable are not negatively affected in either the cable sections or the decoupling section, since the The conductor cross-section remains the same. The cross-sectional area of ​​the cable can be constant in the cable sections.

[0009] According to one embodiment of the invention, a damping element can be arranged in the decoupling section, which is separated from the strands. is surrounded. It is possible that the damping element is not completely covered by the strands. The damping element reduces the cable's resistance. The decoupling section is more stable. The strands are held approximately in their positions by the damping element, thus reducing the risk of damage. Damage to the strands exists, for example due to vibrations.

[0010] According to one embodiment of the invention, the damping element and the strands can be arranged concentrically.

[0011] According to one embodiment of the invention, the damping element can be made of plastic. Plastic is usually well suited as Suitable acoustic damping material.

[0012] According to one embodiment of the invention, the damping element can have a specific sound attenuation of more than 1 dB / mm.

[0013] According to one embodiment of the invention, the strands can be attached to the damping element. This can be done, in particular, by means of a material bond. This can be done, for example, by gluing the strands to the damping element. This reduces the risk of damaging the strands. for example, through vibrations.

[0014] According to one embodiment of the invention, the cable can include electrical insulation. The insulation can be applied to the strands both in the The cable sections are surrounded by insulation, both within the decoupling section and in the decoupling section. Continuous insulation is advantageous for safety reasons.

[0015] According to one embodiment of the invention, the cable can include a shield. The shield can protect the strands both in the cable sections as well as in the decoupling section. The shielding can, for example, be a metal layer that protects the The shielding protects the stranded wires from electromagnetic fields originating in the cable's environment. Conversely, the shielding can also protect the environment from electromagnetic fields. shield against electromagnetic fields generated by an electric current flowing through the cable Continuous shielding is advantageous to prevent interference currents.

[0016] According to one embodiment of the invention, the strands in the cable sections can directly touch each other. The strands can be in The decoupling sections must be spaced apart from each other. This gives the cable particularly high elasticity in the decoupling section, so that Sound waves are conducted relatively poorly.

[0017] Further features and advantages of the present invention will become clear from the following description of preferred Examples of implementation with reference to the accompanying illustrations. These are for identical or similar components and for components The same reference symbols are used for objects with identical or similar functions. Figure 1 shows a schematic cross-sectional view through the... a cable section of a cable according to an embodiment of the invention; Fig. 2 a schematic cross-sectional view through a Decoupling section of the cable from Fig. 1; Fig. 3 a schematic top view of a cable with a decoupling section and two Cable sections according to an embodiment of the invention; and Fig. 4 a schematic top view of a cable with a damping element according to one embodiment of the invention.

[0018] The cable 100 comprises insulation 101, shielding 102 and several strands 103. The strands 103, the shielding 102 and The insulation 101 is arranged concentrically. The strands 103 are electrically conductive and surrounded by the shielding 102. Between the A further layer of insulation 104 is arranged between the shielding 102 and the strands 103. The shielding 102 is surrounded by the insulation 103.

[0019] In the cable section shown in Fig. 1, the cross-sectional area is smaller than in the decoupling section shown in Fig. 2. This is primarily caused by a free space 200 surrounded by the strands 103. The strands 103 are shown in cross-sectional view in Fig. 2. arranged in a geometric circle around the free space 200. The free space helps to ensure that the cable 100 is in the decoupling section. It dampens sound waves particularly well. The strands 103 are relatively flexible relative to each other, resulting in relatively poor sound conductivity. because the elasticity of the cable 100 is relatively high in the decoupling section.

[0020] Figure 3 shows that the decoupling section 300 is arranged between the cable sections 301. For better For clarity, the insulation and shielding were not shown in decoupling section 300. Therefore, it is also evident that the strands 103 are twisted together. In the decoupling section 300, two adjacent strands 103 do not touch each other, so that sound is particularly The current is poorly conducted because the strands 103 are movable relative to each other.

[0021] In Fig. 4, a damping element 400 is arranged in the decoupling section 300. The damping element 400 can, for example, They are made of plastic and have a comparatively high specific sound insulation. The strands 103 can be attached to the damping element 400. It must be glued in place. The damping element 400 primarily serves to reduce the risk of damage to the strands 103. It contributes to mechanical stability of the cable 100 in the decoupling section 300. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was generated automatically and is solely for the better information of the Readers' contributions were included. The list is not part of the German patent or utility model application. The DPMA assumes no liability whatsoever. for any errors or omissions. Cited patent literature

[0000] CN 103354123 A

[0003]

Claims

[1] Electrically conductive cable (100) comprising several twisted strands (103), wherein the strands (103) each have several electrically comprising conductive wires, wherein the cable (100) comprises two cable sections (301) and a conductor arranged between the cable sections (301). decoupling section (300) characterized in that the cable (100) has a larger cross-sectional area in the decoupling section (300). exhibits than in the cable sections (301). [2] Cable (100) according to claim 1, characterized in that a damping element (400) is arranged in the decoupling section (300) which is surrounded by the strands (103). [3] Cable (100) according to the previous claim, characterized in that the strands (103) and the damping element (400) are concentric are arranged. [4] Cable (100) according to one of the two preceding claims, characterized in that the damping element (400) is made of plastic. [5] Cable (100) according to one of the three preceding claims, characterized in that the damping element (400) has a specific exhibits sound attenuation of more than 1 dB / mm. [6] Cable (100) according to one of the four preceding claims, characterized in that the strands (103) are attached to the damping element (400) are. [7] Cable (100) according to one of the preceding claims, characterized in that the cable (100) comprises an electrical insulation (101), wherein the insulation (101) surrounds the strands (103) both in the cable sections (301) and in the decoupling section (300). [8] Cable (100) according to one of the preceding claims, characterized in that the cable (100) comprises a shield (102), wherein the Shielding (102) surrounds the strands (103) both in the cable sections (301) and in the decoupling section (300). [9] Cable (100) according to one of the preceding claims, characterized in that the strands (103) in the cable sections (301) are directly connected to each other touch, and that the strands (103) are spaced apart from each other in the decoupling section (300). [10] Motor vehicle comprising an electric drive, an energy storage device and a cable (100) according to any of the preceding claims, wherein The drive is electrically connected to the energy storage device via the cable.

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