Bus bar system for a stator assembly

1 . A bus bar system comprising,

a first bus bar member;

a second bus bar member;

a third bus bar member;

at least a first spacer member; and

at least a first pin member;

each bus bar member is connectable to an individual winding of a stator assembly for a current supply;

the first bus bar member, the second bus bar member, the third bus bar member are bow-shaped of arc-shaped;

the first bus bar member, the second bus bar member, and the third bus bar member is are arranged substantially stacked and at least partially offset along an elongated direction of the first bus bar member, the second bus bar member, and the third bus bar members the first spacer member is formed substantially cylindrically and comprising a through-hole extending in an axial direction of the first spacer member;

the first spacer member is arranged between the first bus bar member and the second bus bar member, the first bus bar member comprising at least a first aperture extending in a transverse direction of the first bus bar member and the second bus bar member comprising at least a first aperture extending in a transverse direction of the second bus bar member; and

the first pin member is inserted through the first aperture of the first bus bar member, the through-hole of the first spacer member and the first aperture of the second bus bar member to hold the first bus bar member, the second bus bar member and the first spacer member in position;

wherein the first spacer member comprising

a first disc portion comprising a first disc portion outer disc surface and a first disc portion inner disc surface;

a second disc portion comprising a second disc portion outer disc surface and a second disc portion inner disc surface;

a shaft portion;

the first disc portion, the second disc portion and the shaft portion integrally connected;

the first disc portion outer disc surface of the first disc portion contacting a bottom surface of the first bus bar member and the second disc portion outer disc surface of the second disc portion contacting a top surface of the second bus bar member; and

the shaft portion protruding from the second disc portion axially; and

wherein the bus bar system is configured for the stator assembly of an electric machine.

2 . The bus bar system of claim 1 , further comprising at least one locking element, wherein the locking element is mounted at a distal end of the first pin member to fixedly hold the first bus bar member, the second bus bar member, and the first spacer member axially.

3 . The bus bar system of claim 1 , further comprising a fourth bus bar member, wherein the first bus bar member, the second bus bar member, the third bus bar member, and the fourth bus bar member is arranged substantially stacked.

4 . The bus bar system of claim 3 , wherein the first bus bar member, the second bus bar member, the third bus bar member, and the fourth bus bar member are arranged at least partially offset along the elongated direction of the first bus bar member, the second bus bar member, and the third bus bar members.

5 . The bus bar system of claim 4 , further comprising a second spacer member, a third spacer member and a fourth spacer member,

wherein the second spacer member is arranged between the first bus bar member and the second bus bar member, the third spacer member is arranged between the second bus bar member and the third bus bar member, and the fourth spacer member is arranged between the third bus bar member and the fourth bus bar member.

6 . The bus bar system of claim 5 , further comprising a second pin member and a second locking element,

wherein the second pin member is inserted through a second aperture of the first bus bar member, a through-hole of the second spacer member, a second aperture of the second bus bar member, a through-hole of the third spacer member, a first aperture of the third bus bar member, a through-hole of the fourth spacer member, and a first aperture of the fourth bus bar member, and

wherein the second locking element is mounted at a distal end of the second pin member.

7 . The bus bar system of claim 6 , wherein each of the second spacer member, the third spacer member, and the fourth spacer member comprising a first disc portion, a second disc portion, and a shaft portion,

wherein the first disc portion of the second spacer member contacting a bottom surface of the first bus bar member, the second disc portion of the second spacer member contacting a top surface of the second bus bar member,

wherein the first disc portion of the third spacer member contacting a bottom surface of the second bus bar member, the second disc portion of the second spacer member contacting a top surface of the third bus bar member, and

wherein the first disc portion of the fourth spacer member contacting a bottom surface of the third bus bar member, the second disc portion of the second spacer member contacting a top surface of the fourth bus bar member.

8 . The bus bar system of claim 7 , the shaft portion of the second spacer member, the shaft portion of the third spacer member, and the shaft portion of the fourth spacer member is stacked axially such that the through-holes of the second spacer member, the through-hole of the third spacer member, and the through-hole of the fourth spacer member forms an inserting path for the second pin member.

9 . The bus bar system of claim 3 , wherein the fourth bus bar member is coated with a resin.

10 . The bus bar system of claim 1 , wherein the first bus bar member, the second bus bar member, the third bus bar member, are coated with a resin.

11 . A bus bar system comprising,

plurality of bus bar members;

plurality of spacer members;

plurality of pin members; and

plurality of locking elements;

wherein each of the bus bar members are arranged to form a bow-shape or an arc shape and connectable to an individual winding of a stator assembly;

wherein the plurality of the bus bar members are arranged substantially stacked and at least partially offset along an elongated direction of the bus bar members;

wherein at least a spacer member is arranged between two individual bus bar members, wherein the spacer member comprises:

a first disc portion comprising a first disc portion outer disc surface and a first disc portion inner disc surface;

a second disc portion comprising a second disc portion outer disc surface and a second disc portion inner disc surface;

a shaft portion, wherein the shaft portion protruding from the second disc portion axially, and

the first disc portion, the second disc portion and the shaft portion integrally connected;

wherein each bus bar member comprises at least one aperture extending in a transverse direction of the bus bar members;

wherein each of the spacer members are arranged substantially cylindrically and comprising a through-hole extending in an axial direction of the spacer member;

wherein each pin member is inserted through the apertures of at least two of the bus bar members and the through-holes of each of the spacer members so as to align the bus bar members with each other; and

wherein the locking elements are attached to an end of the pin member to fixedly hold the bus bar members and the spacer members in the axial direction of the spacer member.

12 . The bus bar system of claim 11 , wherein the bus bar system is a component of the stator assembly.

13 . The bus bar system of claim 12 , wherein the stator assembly is a component of an electric machine.

14 . A method comprising:

arranging a first bus bar member, a second bus bar member, and a third bus bar member substantially stacked and at least partially offset along an elongated direction of the first bus bar member, the second bus bar member, and the third bus bar member;

arranging a first spacer member between the first bus bar member and the second bus bar member, wherein the first spacer member comprises,

a first disc portion comprising a first disc portion outer disc surface and a first disc portion inner disc surface,

a second disc portion comprising a second disc portion outer disc surface and a second disc portion inner disc surface;

a shaft portion;

the first disc portion, the second disc portion and the shaft portion integrally connected;

the first disc portion outer disc surface of the first disc portion contacting a bottom surface of the first bus bar member and the second disc portion outer disc surface of the second disc portion contacting a top surface of the second bus bar member; and

the shaft portion protruding from the second disc portion axially; and

inserting a first pin member through a first aperture of the first bus bar member, a through-hole of the first spacer member, and a first aperture of the second bus bar member to hold the first bus bar member, the second bus bar member, and the first spacer member in position;

wherein each bus bar member is formed in a bow-shape or an arc shape and connectable to an individual winding of a stator assembly for a power supply;

wherein the first spacer member is formed substantially cylindrically and comprising the through-hole extending in an axial direction of the first spacer member; and

wherein the first bus bar member and the second bus bar member comprise at least the first aperture extending in a transverse direction of the first bus bar member and the second bus bar member; and

wherein the method is configured for manufacturing of a bus bar system for the stator assembly of an electric machine.

15 . The method of claim 14 , wherein the first pin member and a first locking element are pressed against each other to fixedly hold the first bus bar member, the second bus bar member, and the first spacer member axially.

16 . The method of claim 14 , wherein a first locking element is welded at a distal end of the first pin member.