Connection assembly for connecting a thin conductor piece to a thick conductor piece

1. A connection assembly comprising:

a thick conductor piece including a receptacle having an inner wall;

a thin conductor piece for electrically connecting to the thick conductor piece and having a protrusion for insertion into the receptacle, the protrusion directly contacting the inner wall of the thick conductor piece; and

a press-fit element inserted into the receptacle with the protrusion in the receptacle between the press-fit element and the thick conductor piece, the press-fit element comprising, prior to insertion into the receptacle, a shape having a generally uniform diameter over its length that is greater than a dimension of the protrusion in a direction perpendicular to an insertion direction of the press-fit element and configured to be substantially only elastically deformed as it is inserted into the receptacle for forming a press-fit connection between the protrusion and the inner wall.

2. The connection assembly of claim 1 , wherein the thin conductor piece has an insertion opening and the protrusion partly surrounds the insertion opening of the thin conductor piece for inserting the press-fit element.

3. The connection assembly of claim 2 , wherein the protrusion protrudes essentially perpendicular from a neighboring section of the thin conductor piece, the protrusion extending through the receptacle and protruding from an underside of the thick conductor.

4. The connection assembly of claim 3 , wherein the protrusion and the receptacle have geometrically similar cross-sections in the plane of the thick conductor piece.

5. The connection assembly of claim 2 , wherein a thickness of the thin conductor piece adjacent to the protrusion is smaller than the thickness of the thick conductor piece adjacent to the receptacle.

6. The connection assembly of claim 1 , wherein the press-fit element has a disc-like shape, the press-fit element having a thickness in the insertion direction that is less than the diameter of the press-fit element and a though hole formed therethrough in a direction of the thickness.

7. The connection assembly of claim 1 , wherein the receptacle is a through hole.

8. The connection assembly of claim 1 , wherein the thick conductor piece has, in a vicinity of the receptacle, a sealant and/or an adhesive sealant.

9. The connection assembly of claim 1 , wherein the thin conductor piece is at least a part of a flexible printed circuit or of a flat flexible cable.

10. The connection assembly of claim 9 , wherein the thin conductor piece is a conductive layer of a printed circuit board.

11. The connection assembly of claim 1 , wherein the assembly further comprises a bushing between the press-fit element and the protrusion of the thin conductor piece in an assembled state.

12. The connection assembly of claim 11 , wherein the bushing has a rib which projects from an outer side of the bushing towards the protrusion in the assembled state.

13. The connection assembly of claim 12 , wherein the bushing has a radial flange which is arranged adjacent to the receptacle in the assembled state.

14. The connection assembly of claim 1 , wherein the thin conductor piece comprises a conductive foil.

15. The connection assembly of claim 1 , wherein the thin conductor piece comprises a conductive copper or copper alloy sheet.

16. The connection assembly of claim 1 , configured for a battery management system.

17. A connection assembly comprising:

a thick conductor piece including a receptacle having an inner wall;

a thin conductor piece for electrically connecting to the thick conductor piece and having a protrusion for insertion into the receptacle, the protrusion directly contacting the inner wall of the thick conductor piece; and

a press-fit element adapted to be inserted into the receptacle with the protrusion in the receptacle between the press-fit element and the thick conductor piece, the press-fit element comprising, prior to insertion into the receptacle, a disc-like shape of a generally uniform diameter over its length, the diameter prior to insertion into the receptacle greater than a dimension of the protrusion in a direction perpendicular to an insertion direction of the press-fit element, the press-fit element configured to be substantially only elastically deformed for generating a press-fit connection once inserted into the receptacle.

18. The connection assembly of claim 17 , wherein, in an assembled state of the assembly, the press-fit connection is generated between the protrusion and the inner wall by the press-fit element and the thick conductor piece.