EV charging cable system with cooling

Patent metadata

Field	Value
Publication number	US-11804315-B2
Application number	US-202016864295-A
Country	US
Kind code	B2
Filing date	May 1, 2020
Priority date	May 1, 2019
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A charging system for an electric energy storage includes a cable assembly and a plug transition between the cable assembly and the electric energy storage. The cable assembly includes a cable provided with at least two separate power conductors and at least one earth conductor. The power conductors are spaced apart from each other within the cable, with each surrounding at least one tube and including a plurality of intertwisted wires stranded around the tube. The cable assembly also includes at least two separate cooling circuits within the cable, namely a first cooling circuit having a cooling fluid in the tubes surrounded by the power conductors, and a second cooling circuit having a cooling fluid in auxiliary tubes to cool the plug transition. Systems and methods are also provided for charging an electrical energy storage on basis of such a cable assembly.

First claim

What is claimed is:

1. A charging system for an electric energy storage comprising a charging cable assembly, a plug transition between said charging cable assembly and said electric energy storage, said charging cable assembly comprising a cable provided with at least two separate power conductors, at least one sheath, and at least one earth conductor, each of the at least one sheath being surrounded by one of the at least one earth conductor, wherein the at least two separate power conductors are spaced a distance apart from each other within said cable, each of the at least two separate power conductors surrounds at least one tube, and the each of the at least two separate power conductors comprises a plurality of intertwisted wires stranded around said at least one tube, wherein said charging cable assembly comprises at least two separate cooling circuits within said cable, namely a first cooling circuit comprising a cooling fluid in the at least one tube surrounded by the at least two power conductors and a second cooling circuit comprising a cooling fluid in at least one auxiliary tube configured to cool the plug transition.

2. The charging system according to claim 1 , wherein the each of the at least two separate power conductors is surrounded by one of the at least one sheath.

3. The charging system according to claim 1 , wherein the at least one sheath is a common sheath, wherein said at least two separate power conductors are surrounded by the common sheath.

4. A charging system for an electric energy storage, the charging system comprising:
a charging cable assembly comprising a cable, the cable comprising:
a first cooling circuit comprising a first tube and a second tube;
a first power conductor comprising a first plurality of intertwisted wires stranded at least partially around the first tube, wherein the first tube is configured to convey cooling fluid for cooling of the first power conductor;
a second power conductor spaced laterally from the first power conductor and comprising a second plurality of intertwisted wires stranded at least partially around the second tube, wherein the second tube is configured to convey cooling fluid for cooling of the second power conductor;
a second cooling circuit separate from the first cooling circuit and comprising an auxiliary tube spaced laterally from each of the first power conductor and the second power conductor; and
an earth conductor; and

a plug transition coupling the charging cable assembly and the electric energy storage, wherein the auxiliary tube is configured to convey cooling fluid for cooling of the plug transition.

5. The charging system according to claim 4 , wherein said first cooling circuit is configured for cooling the first and second power conductors and comprises a tube connector, a cooling unit and a pump, wherein at least one of the first tube and second tube is surrounded by said at least two separate power conductors.

6. The charging system according to claim 4 , wherein said second cooling circuit comprises a cooling block, the cooling block connected to the auxiliary tube and in thermal conductive contact with the plug transition.

7. The charging system according to claim 6 , wherein said second cooling circuit further comprises a cooling unit and a pump.

8. The charging system according to claim 4 , wherein said first cooling circuit and said second cooling circuit comprise a mutual cooling unit.

9. The charging system according to claim 4 , wherein the cooling fluids of said first cooling circuit and said second cooling circuit are cooled in a mutual cooling unit.

10. The charging system according to claim 4 , wherein said earth conductor surrounds said auxiliary tube.

11. The charging system according to claim 4 , wherein the cross sectional area of the first and second power conductors is equal to or greater than the cross sectional area of the earth conductor.

12. The charging system according to claim 4 , further comprising a signal conductor arranged inside of said cable and configured to provide transmission of information along said cable.

13. The charging system according to claim 4 , wherein said auxiliary tube is provided at interstices between the first and second power conductors.

14. The charging system according to claim 4 , wherein a diameter of the charging cable assembly is 45 mm or less.

Assignees

• Prysmian Spa

Inventors

• Neumann Andreas

Classifications

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H01B9/006 Primary

  Constructional features relating to the conductors · CPC title

• F16L53/70

  Cooling of pipes or pipe systems · CPC title

• H02J7/0045

  Electricity · mapped topic

• H01B9/02

  with screens or conductive layers, e.g. for avoiding large potential gradients · CPC title