Liquid cooled cable and charging cable assembly

1. A liquid cooled cable ( 1 ) comprising:

a. a conductor ( 2 ) including at least two cable strands ( 3 ), wherein the at least two cable strands ( 3 ) comprise wires ( 4 ) stranded with respect to each other, wherein the wires ( 4 ) of a cable strand ( 3 ) are mechanically compressed with respect to each other, thereby increasing a higher area current carrying cross-section, wherein the wires ( 4 ) comprise copper;

b. the conductor ( 2 ) encompassed by a hose ( 5 ) spaced at least partially apart from the conductor ( 2 ) by an interstitial space ( 6 ) arranged between an inner wall ( 7 ) of the hose ( 4 ) and the cable strands ( 3 ) of the conductor ( 2 ), wherein the inner wall ( 7 ) of the hose ( 5 ) comprises a diameter in the range of 5% to 15% bigger than a diameter of an envelope curve ( 9 ) of the corresponding conductor ( 2 );

c. the interstitial space ( 6 ) including a cooling liquid ( 15 ) in the hose ( 5 ) along the conductor ( 2 ).

2. The liquid cooled cable ( 1 ) according to claim 1 , wherein the at least two cable strands ( 3 ) are stranded with respect to each other in a helical manner in a longitudinal direction (x) of the conductor ( 2 ).

3. The liquid cooled cable ( 1 ) according to claim 1 , wherein the conductor ( 2 ) comprises one of:

a. two cable strands ( 3 ) in a cross-section being spaced by 180° apart from each other with respect to a center ( 16 ) of the conductor ( 2 ); and

b. three cable strands ( 3 ) in a cross-section being spaced by 120° apart from each other with respect to the center ( 16 ) of the conductor ( 2 ).

4. The liquid cooled cable ( 1 ) according to claim 1 , wherein the at least two cable strands ( 3 ) are spaced apart from each other by a spacer.

5. The liquid cooled cable ( 1 ) according to claim 1 , wherein the hose ( 5 ) comprises an essentially circular cross-section.

6. The liquid cooled cable ( 1 ) according to claim 1 , wherein the hose ( 5 ) is self-supporting.

7. The liquid cooled cable ( 1 ) according to claim 1 , wherein the conductor ( 2 ) is arranged laterally movable with respect to the hose ( 5 ) resulting in a variable interstitial space ( 6 ).

8. The liquid cooled cable ( 1 ) according to claim 1 , wherein the length of twist of the cable strands ( 3 ) is in the range of 7 to 15 times a diameter of an envelope curve ( 9 ) of the corresponding conductor ( 2 ).

9. A charging cable ( 10 ) comprising at least one liquid cooled cable ( 1 ) according to claim 1 .

10. The charging cable ( 10 ) according to claim 9 , wherein the charging cable ( 10 ) comprises two liquid cooled cables ( 1 ) arranged adjacent to each other.

11. The charging cable ( 10 ) according to claim 9 , wherein the charging cable ( 10 ) comprises a flow hose ( 12 ) for the cooling liquid ( 15 ).

12. The charging cable ( 10 ) according to claim 9 , wherein the charging cable ( 10 ) comprises an outer hose ( 11 ).

13. A method for making of a liquid cooled cable ( 1 ) comprising the following steps:

a. providing a conductor ( 2 ) including at least two cable strands ( 3 ), the at least two cable strands ( 3 ) including wires ( 4 ) stranded with respect to each other, wherein the wires ( 4 ) of a cable strand ( 3 ) are mechanically compressed with respect to each other, thereby increasing a higher area current carrying cross-section, wherein the wires ( 4 ) comprise copper;

b. encompassing the conductor ( 2 ) with a hose ( 5 ) extruded over the at least two cable strands ( 3 ) in a continuous manner spaced at least partially apart from the conductor ( 2 ) by an interstitial space ( 6 ) arranged between an inner wall ( 7 ) of the hose ( 5 ) and the cable strands ( 3 ) of the conductor ( 2 ), wherein the inner wall ( 7 ) of the hose ( 5 ) comprises a diameter in a range of 5% to 15% larger than a diameter of an envelope curve ( 9 ) of the corresponding conductor ( 2 ); and

c. conducting a cooling liquid ( 15 ) within the interstitial space ( 6 ) in the hose ( 5 ) along the conductor ( 2 ).

14. The method according to claim 13 , wherein the at least two cable strands ( 3 ) during production are stranded with respect to each other in a helical manner in a longitudinal direction (x) of the conductor ( 2 ).

15. The method according to claim 13 , wherein the wires ( 4 ) of at least one cable strand ( 3 ) are mechanically compressed with respect to each other before the hose ( 5 ) is extruded over the at least two cable strands ( 3 ).