Charging Cable For Transmitting Electrical Energy, Charging Plug and Charging Station For Discharging Electrical Energy To a Recipient of Electrical Energy

Abstract

The present invention discloses a charging cable (1) for transmitting electrical energy, having a cable sheath (2) and at least one electric conductor cable (3) arranged within the cable sheath (2), wherein the charging cable (1) is characterized in that at least one cavity (10) within the charging cable (1), between the cable sheath (2) and the electric conductor cable (3), is filled with a heat conduction medium (11), such that the heat conduction medium (11) is in direct contact with the electric conductor cable (3).

Claims

1. A charging cable (1) for transmitting electrical energy, having a cable sheath (2) and at least one electric conductor cable (3) arranged within the cable sheath (2), characterized in that at least one cavity (10) within the charging cable (1), between the cable sheath (2) and the electric conductor cable (3), is filled with a heat conduction medium (11) such that the heat conduction medium (11) is in direct contact with the electric conductor cable (3).

2. The charging cable (1) as claimed in claim 1, characterized in that the charging cable (1) comprises at least one cooling line (5), which is arranged within the cable sheath (2) and can accommodate a flux of coolant fluid.

3. The charging cable (1) as claimed in claim 2, characterized in that a cavity (10) in the charging cable (1), between the cable sheath (2) and the cooling line (5) is filled with the heat conduction medium (11), such that the heat conduction medium (11) is in direct contact with the cooling line (5).

4. The charging cable (1) as claimed in one of the preceding claims, characterized in that the charging cable (1) comprises at least one heat conduction cord (7), which is in direct contact with the heat conduction medium (11).

5. The charging cable (1) as claimed in one of the preceding claims, characterized in that the charging cable (1) comprises at least one filler cord (8), which is impregnated with the heat conduction medium (11).

6. The charging cable (1) as claimed in one of the preceding claims, characterized in that the charging cable (1) comprises a metal cladding (9) which encloses the cable sheath (2).

7. The charging cable (1) as claimed in one of the preceding claims, characterized in that the heat conduction medium (11) is configured as a gel (11), specifically as a gel (11) which is loaded with a ceramic powder.

8. The charging cable (1) as claimed in one of claims 1 to 6, characterized in that the heat conduction medium (11) is configured as a dispersion (11), specifically as a dispersion (11) which is loaded with a ceramic powder.

9. A charging plug for connection to a corresponding coupling device and for the transmission of electrical energy, characterized in that the charging plug comprises at least one power contact, which is arranged in a charging plug housing, wherein a second contact region of the power contact is galvanically connected to a charging cable (1) as claimed in one of the preceding claims, and wherein a first contact region of the power contact is accessible via a contact side of the charging plug housing.

10. A charging station for discharging electrical energy to a recipient of electrical energy, characterized in that the charging station comprises a charging plug as claimed in claim 9.

Description

[0041] Further advantages, details and characteristics of the invention proceed from the exemplary embodiments described hereinafter. Specifically:

[0042] FIG. 1A: shows a perspective representation of a charging cable according to the invention, according to a first form of embodiment of the present invention;

[0043] FIG. 1B: shows a cross-sectional representation of the charging cable represented in FIG. 1A;

[0044] FIG. 2A: shows a perspective representation of a charging cable according to the invention, according to a second form of embodiment of the present invention; and

[0045] FIG. 2B: shows a cross-sectional representation of the charging cable represented in FIG. 1A.

[0046] In the following description, identical components or identical characteristics are identified by identical reference numbers, such that the description of a component provided with reference to one figure is also valid for the remaining figures, thereby obviating any repeated description. Moreover, individual characteristics described with reference to one form of embodiment can also be applied separately in other forms of embodiment.

[0047] FIGS. 1A and 1B represent a charging cable 1 according to a first form of embodiment of the present invention wherein, in FIG. 1A, the charging cable 1 is shown in a perspective representation and, in FIG. 1B, is shown in a cross-sectional representation.

[0048] The charging cable 1 for the transmission of electrical energy comprises a cable sheath 2, which encloses all the components of the charging cable 1. The charging cable 1 further comprises two electric conductor cables 3 which, in the exemplary embodiment represented, are configured for the transmission of direct current. The two electric conductor cables 3 are respectively enclosed in an insulating sheath 4, such that the electric conductor cables 3 are not in electrical contact with their environment.

[0049] From FIGS. 1A and 1B it can be seen that, within the charging cable 1, cavities 10 are arranged between the cable sheath 2 and the electric conductor cable 3, more specifically between the cable sheath 2 and the insulating sheaths 4. These cavities 10 are filled with a heat conduction medium 11, such that the heat conduction medium 11 is in direct contact with the insulating sheaths 4 of the electric conductor cables 3.

[0050] Consequently, heat generated within the electric conductor cables 3 by ohmic losses is evacuated, in a highly effective manner, to the heat conduction medium 11, which then discharges the heat thus taken up to the remaining structures and components of the charging cable 1. Any overheating of the electric conductor cables 3 is thus effectively counteracted by the provision of the heat conduction medium 11 in the cavities 10 of the charging cable 1.

[0051] From FIGS. 1A and 1B, it can be seen that the charging cable 1 further comprises two cooling lines 5, in each of which a coolant fluid duct 6 is configured. The cooling lines 5 are arranged to accommodate a flux of a coolant fluid. Heat generated by the electric conductor cables 3 and transmitted to the heat conduction fluid 10 is thus effectively evacuated by means of a coolant fluid stream within the cooling lines 5, which are also in direct contact with the heat conduction medium 11.

[0052] It can further be seen that the charging cable 1 comprises a plurality of heat conduction cords 7, which are likewise in direct contact with the heat conduction medium 11. The heat conduction cords 7 can be configured, for example, in the form of copper lines 7. The heat conduction cords 7 have a high thermal conductivity, such that heat taken up by the heat conduction fluid 11 is effectively distributed within the charging cable 1 by means of the heat conduction cords 7.

[0053] The charging cable 1 according to the invention further comprises a plurality of filler cords 8, which are likewise in direct contact with the heat conduction medium 11. The filler cords 8 can be configured of a fibrous material, for example of a cotton fiber fabric. During the manufacture of the charging cable 1, the filler cords 8 can be impregnated with the heat conduction medium 11 such that, upon stranding of the charging cable 1, the heat conduction medium 11 stored in the filler cords 8 is discharged into the cavities 10 in the charging cable 11.

[0054] FIGS. 2A and 2B represent a charging cable 1 according to a second form of embodiment of the present invention wherein, in FIG. 2A, the charging cable 1 is shown in a perspective representation and, in FIG. 2B, is shown in a cross-sectional representation. The charging cable 1 according to the second form of embodiment differs from the charging cable 1 according to the first form of embodiment, in that the charging cable 1 according to the second form of embodiment further comprises a metal cladding 9, which encloses the cable sheath 2 of the charging cable 1. The metal cladding 9 enhances the evacuation of heat from the charging cable 1 to the environment. The remaining design of the charging cable 1 according to the second form of embodiment is identical to the configuration of the charging cable 1 according to the first form of embodiment, such that reference may be made to the above description accordingly.

LIST OF REFERENCE NUMBERS

[0055] 1 Charging cable [0056] 2 Cable sheath [0057] 3 Electric conductor cable [0058] 4 Insulating sheath (of the electric conductor cable) [0059] 5 Cooling line [0060] 6 Coolant fluid duct (of the cooling line) [0061] 7 Heat conduction cord/copper cord [0062] 8 Filler cord [0063] 9 Metal cladding [0064] 10 Cavity in the charging cable [0065] 11 Heat conduction medium/heat conduction gel/heat conduction fluid