Electrical bus bar

1. An electrical bus bar, comprising:

a first mounting portion configured to be connected to a first counter connector;

a second mounting portion configured to be connected to a second counter connector;

a flexible section between the first and second mounting portions;

a first flat part; and

a second flat part, wherein the first flat part and the second flat part each extend from the first mounting portion to the second mounting portion and are arranged in a stacked configuration, wherein the first flat part and the second flat part are made of sheet metal, wherein a first strip of the sheet metal extends from a body edge of the first flat part to a body edge of the second flat part forming a first link, wherein the first link is dimensioned to keep a first contact surface of the first flat part and a second contact surface of the second flat part in intimate contact, wherein the first flat part comprises an arm protruding from the first contact surface located in the flexible section, wherein the second flat part comprises an opening located in the flexible section, and wherein the arm is formed to protrude into the opening, thereby limiting movement of the first flat part in relation to the second flat part.

2. The electrical bus bar according to the claim 1 , wherein the arm protrudes through the opening and wherein an arm end is in contact to a third contact surface of the second flat part opposite to the second contact surface to keep the first contact surface of the first flat part and the second contact surface of the second flat part in intimate contact.

3. The electrical bus bar according to the claim 2 , wherein the electrical bus bar comprises a third flat part, extending from the first mounting portion to the second mounting portion, made of the sheet metal and arranged to the stacked configuration, wherein a second strip of the sheet metal extends from the body edge of the first flat part to a body edge of the third flat part forming a second link, wherein the third flat part comprises a forth contact surface that is in intimate contact with the third contact surface.

4. The electrical bus bar according to the claim 3 , wherein the first link and the second link are attached to the body edges at positions where the body edges are parallel to a longitudinal axis.

5. The electrical bus bar according to the claim 4 , wherein the second link is attached to the body edge of the first flat part and to the body edge of the third flat part at positions where the body edges are substantially parallel to the longitudinal axis and wherein the first link and the second link are arranged on positions, opposite to each other, along a transversal axis, perpendicular to the longitudinal axis.

6. The electrical bus bar according to the claim 4 , wherein an extension of the first link is smaller than an extension of the second link.

7. The electrical bus bar according to the claim 4 , wherein the third flat part comprises a second opening located in the flexible section, wherein the arm is formed to protrude into the second opening, thereby limiting movement of the first flat part in relation to the second flat part and the third flat part.

8. The electrical bus bar according to the claim 7 , wherein the arm protrudes through the second opening and wherein the arm end is in contact to a fifth contact surface of the third flat part opposite to a fourth contact surface to keep the first contact surface of the first flat part and the second contact surface of the second flat part, furthermore the third contact surface of the second flat part and the fourth contact surface of the third flat part in intimate contact.

9. The electrical bus bar according to the claim 1 , wherein the electrical bus bar is made of one piece of sheet metal.

10. The electrical bus bar according to the claim 1 , wherein all contact surfaces are plated with tin.

11. The electrical bus bar according to the claim 1 , wherein the electrical bus bar has an elongated shape aligned along a longitudinal axis, wherein the first link is attached to the body edges of the first flat part and the second flat part at a positions where the body edges are substantially parallel to the longitudinal axis.

12. The electrical bus bar according to the claim 1 , wherein the first mounting portion comprises a first connecting opening and the second mounting portion comprises a second connecting opening.

13. The electrical bus bar according to the claim 12 , wherein the first connecting opening or the second connecting opening is equipped with an electrical terminal.

14. A method for manufacturing a multi-part electrical bus bar having a first mounting portion configured to be connected to a first counter connector, a second mounting portion configured to be connected to a second counter connector, a flexible section between the first and second mounting portions, a first flat part, and a second flat part, wherein the first flat part and the second flat part each extend from the first mounting portion to the second mounting portion and are arranged in a stacked configuration, wherein the first flat part and the second flat part are made of sheet metal, wherein a first strip of the sheet metal extends from a body edge of the first flat part to a body edge of the second flat part forming a first link, wherein the first link is dimensioned to keep a first contact surface of the first flat part and a second contact surface of the second flat part in intimate contact, wherein the first flat part comprises an arm protruding from the first contact surface located in the flexible section, wherein the second flat part comprises an opening located in the flexible section, and wherein the arm is formed to protrude into the opening, thereby limiting movement of the first flat part in relation to the second flat part, said method comprising the steps of:

a) providing the sheet metal and a tooled stamping machine;

b) inserting the sheet metal into the stamping machine;

c) stamping the second flat part and the first flat part attached to a carrier strip from the sheet metal using the stamping machine, thereby forming the arm and the opening;

d) folding the first flat part and second flat part to a stacked configuration, wherein the first link limits the movement of the first flat part and second flat part; and

e) removing the first flat part from the carrier strip.