Method for establishing a connection between an electrical connecting element for a motor vehicle on-board network and a cable of the motor vehicle on-board network

1. Method for establishing a connection between an electrical connecting element for a motor vehicle on-board network and a cable of the motor vehicle on-board network, comprising:

providing the cable having a metallic stranded conductor;

first, mechanically compacting the metallic stranded conductor in such a way that a flat area extending in a longitudinal direction of the conductor is formed with a degree of compaction of between 70% and 100%, wherein during the compaction a material bond is formed between strands of the stranded conductor along the longitudinal direction, and wherein the flat area is compacted by a welding of the strands of the stranded conductor; and

wherein during the compacting bare strands of the metallic stranded conductor are pressed against each other in the flat area and welded to each other in the flat area,

then welding the electrical connecting element to the flat area with a material bond.

2. Method of claim 1 , wherein the flat area is compacted by means of ultrasonic welding or by means of resistance welding.

3. Method of claim 1 , wherein an end-to-end recess is formed in the flat area and the electrical connecting element is arranged in the recess.

4. Method of claim 1 , wherein the electrical connecting element is ring-shaped.

5. Method of claim 1 , wherein the electrical connecting element is connected to the strands in a material bond on both sides of the flat area.

6. Method of claim 1 , wherein a profile is introduced into the flat area during welding.

7. Method of claim 6 , wherein the profile is a relief-shaped profile embossed into the flat area during welding which runs at an angle to the longitudinal axis of the strands of the stranded conductor.

8. Method of claim 6 , wherein the profile is strip-shaped or grid-shaped.

9. Method of claim 6 , wherein the profile is introduced on both sides of the flat area.

10. A device comprising:

a cable with a metallic stranded conductor obtained by mechanically compacting the metallic stranded conductor in such a way that a flat area extending in a longitudinal direction of the conductor is formed with a degree of compaction of between 70% and 100%, wherein during the compaction a material bond is formed between strands of the stranded conductor along the longitudinal direction, and wherein the flat area is compacted by a welding of the strands of the stranded conductor,

wherein during the compacting bare strands of the metallic stranded conductor are pressed against and welded to each other in the flat area.

11. The device of claim 10 , wherein the stranded conductor is a round conductor and/or that the stranded conductor is formed from aluminium or an alloy thereof and/or that the stranded conductor is formed from solid material.

12. The device of claim 10 , wherein the cable further includes an insulation of the stranded conductor, and wherein the flat area is arranged in a stripped region of the cable arranged between two insulation sections of the insulation.

13. The device of claim 12 , wherein the insulation in the insulation sections completely encloses the stranded conductor.

14. The device of claim 10 , further comprising an electrical connecting element connected to the conductor in the flat area by a material bond.

15. The device of claim 14 , wherein the electrical connecting element is formed from aluminium or alloys thereof and/or the electrical connecting element is formed from copper or alloys thereof, steel or stainless steel and/or the electrical connecting element is tin-plated and/or under-nickel-plated.

16. The device of claim 14 , wherein the electrical connecting element is connected to the flat area by means of ultrasonic welding.

17. The device of claim 14 , wherein the electrical connecting element is connected to the flat area by means of friction welding, in particular rotational friction welding.

18. The device of claim 14 , wherein the electrical connecting element is ring-shaped sleeve-shaped and is connected to the flat area on both sides of the flat area with collars pointing radially outwards in a material bond.

19. The device of claim 14 , wherein the electrical connecting element and the stranded conductor are encased, preferably overmoulded, with an insulation, in particular beyond the insulation of the stranded conductor.

20. The device of claim 14 , wherein the cable is electrically coupled to a motor vehicle battery for carrying power from the battery.