Cable lug for cooled high-voltage lines

Abstract

The invention relates to a connection device for an internally cooled line, in particular a high-voltage line. The invention also relates to a line system having an internally cooled line and a connection device of this type. One embodiment of the connection device (100) has: an outer line-receiving means (160) for connection to the internally cooled line (1000); and an inner at least approximately tubular tube-receiving means (120), in particular a capillary tube, with at least sections thereof arranged in the outer line-receiving means (160), for receiving at least one section of a cooling tube (1200) arranged in the internally cooled line (1000).

Description

[0001] LEONI Kabel GmbH - 1 - 30A-168 817

[0002] Cable lug for cooled high-voltage cables

[0003] The invention relates to a connection device for an internally cooled cable, in particular a high-voltage cable. Furthermore, the invention relates to a cable system comprising an internally cooled cable and such a connection device.

[0004] Cable lugs generally allow for the electrical connection of wires or strands using screws, plugs, or terminal blocks. For example, such cable lugs are frequently used for electrical contact in high-voltage connectors. They are very easy and quick to connect and can ensure consistently low contact resistance.

[0005] Conventional internally cooled cables are often constructed with one or more electrical conductors arranged around a cooling hose. Due to their design, such as high-voltage cables, they cannot be crimped onto a cable lug in the traditional way. The cooling hose inside the cable would collapse under the crimping force, and a satisfactory crimp would not be achieved. A collapsed cooling hose reduces cooling performance.

[0006] Therefore, there is a need for an improved connection for internally cooled pipes. In particular, there is a need for an improved connection device for an internally cooled pipe, as well as for an improved piping system with such a connection device and an internally cooled pipe.

[0007] According to a first aspect of the invention, a connection device for an internally cooled line is proposed. The connection device has an outer line receptacle. The connection device has an inner, at least nearly tubular, hose receptacle. The at least nearly tubular hose receptacle is arranged at least partially in or within the outer line receptacle. The outer line receptacle serves to receive and / or connect to the internally cooled line. The at least nearly tubular hose receptacle serves to receive at least a section of a cooling hose arranged in the internally cooled line.

[0008] The arrangement of the at least partially tubular hose receptacle in or within the outer pipe receptacle can be such that...

[0009] (37) LEONI Kabel GmbH - 2 - 30A-168 817 is understood to mean that the at least nearly tubular hose receptacle is arranged at least section by section in an interior formed or bounded by the outer cable receptacle.

[0010] The connection between the external cable receptacle and the internally cooled cable can be mechanical. It can also be electrical. The mechanical connection can, for example, create or necessitate an electrical connection. This connection thus allows for simple electrical contact between one or more conductors of the internally cooled cable and the external cable receptacle.

[0011] An area containing the outer conductor receptacle in the longitudinal direction can define or correspond to a connection area. Within this connection area, a connection can be made between the outer conductor receptacle and the internally cooled conductor, for example, a crimp connection.

[0012] At least one section of the at least nearly tubular hose receptacle can overlap longitudinally with the outer hose receptacle. At least one section of the at least nearly tubular hose receptacle may not overlap longitudinally with the outer hose receptacle. The longitudinal direction refers to the direction along the longitudinal axis of the at least nearly tubular hose receptacle. The longitudinal axis is normally defined as the axis of a body (here: the at least nearly tubular hose receptacle) that corresponds to the direction of its greatest extent or extension.

[0013] The connection device may have a cable lug or be designed as a cable lug. The hose receptacle, which is at least nearly tubular, may be arranged within an interior space bounded or defined by the outer cable receptacle. For example, the hose receptacle, which is at least nearly tubular, may be surrounded at least partially, for example completely, by the outer cable receptacle in the circumferential direction. The hose receptacle, which is at least nearly tubular, may be hollow, particularly on the inside. Likewise, the cable receptacle may have an internal cavity.

[0014] The hose receptacle, which is at least nearly tubular, can be capillary-shaped. In this case, the hose receptacle, which is at least nearly tubular, can be capillary-shaped.

[0015] (37) LEONI Kabel GmbH - 3 - 30A-168 817 may also be designed as a capillary and be described accordingly. A capillary is usually a (very) fine, elongated cavity. In general, capillaries are tubes with (very) small inner diameters.

[0016] The outer pipe fitting can have an inlet opening and an outlet opening. The inlet opening of the pipe fitting can, for example, accommodate the internally cooled pipe. The outlet opening can, for example, accommodate the hose fitting, which is at least nearly tubular. The hose fitting, which is at least nearly tubular, can also have an inlet opening and an outlet opening. The inlet opening of the hose fitting, which is at least nearly tubular, can, for example, accommodate the cooling hose. The hose fitting, which is at least nearly tubular, and / or the outer pipe fitting can be formed as a single piece.

[0017] The hose fitting, which is at least nearly tubular, can have a cross-sectional shape that is at least nearly round. Alternatively, the hose fitting, which is at least nearly tubular, can have a cross-sectional shape that is at least nearly non-round. For example, the hose fitting, which is at least nearly tubular, can have a polygonal cross-sectional shape, such as hexagonal or octagonal. According to the first example, the hose fitting, which is at least nearly tubular, can have an inner wall with a cross-sectional shape that is at least nearly round and an outer wall with a cross-sectional shape that is at least nearly round. According to the second example, the hose fitting, which is at least nearly tubular, can have an inner wall with a cross-sectional shape that is at least nearly round and an outer wall with a non-round cross-sectional shape, such as a polygonal (e.g., hexagonal or octagonal) cross-section.

[0018] The outer cable receptacle can have a cross-sectional shape that is at least nearly annular. Alternatively, the outer cable receptacle can have a cross-sectional shape that is at least nearly non-circular, e.g., polygonal. An outer cable receptacle with a polygonal cross-sectional shape can also be connected to a round cable by, for example, crimping or pressing the polygonal cross-sectional shape onto the round cable. According to the first example, the outer cable receptacle can have an inner wall with a cross-sectional shape that is at least nearly annular and an outer wall with a cross-sectional shape that is at least nearly annular. According to the second example, the outer cable receptacle can have an inner wall with a cross-sectional shape that is at least nearly annular and an outer wall with a cross-sectional shape that is at least nearly non-circular, for example, polygonal (e.g., hexagonal or octagonal).

[0019] The hose receptacle, which is at least nearly tubular, can have a straight shape, at least in sections, in the longitudinal direction. Additionally or alternatively, the hose receptacle, which is at least nearly tubular, can have a curved shape, at least in sections, in the longitudinal direction. For example, the hose receptacle, which is at least nearly tubular, can have a straight shape as long as it runs within the outer hose receptacle. After leaving the outer hose receptacle, the hose receptacle, which is at least nearly tubular, can have a curved shape with, for example, predefined curves or radii. This can facilitate hose routing, i.e., the routing of the cooling hose. Furthermore, potential problems with the sealing of the cooling hose in / out of high-voltage areas can be avoided or circumvented.

[0020] The hose receptacle, which is at least nearly tubular, can have a first section with a first strength and / or stiffness in a longitudinal direction of the hose receptacle.

[0021] The hose receptacle, which is at least nearly tubular, can have a second section with a second strength and / or stiffness along its longitudinal direction. This second strength and / or stiffness is lower than the first. In other words, the second section can have greater flexibility than the first. For example, the first section can be located in the junction area between the outer hose receptacle and the internally cooled hose. Conversely, the second section can be located outside the junction area between the outer hose receptacle and the internally cooled hose.

[0022] The second section of the at least nearly tubular hose receptacle can, for example, be designed as or comprise a plastic hose. The plastic hose can, for instance, be pushed onto the first section. The inner wall of the plastic hose can be connected to the first section.

[0023] For example, the at least nearly tubular hose receptacle can initially be relatively firm and / or rigid (i.e., in an entry area and / or overlap area with the outer cable receptacle). In this LEONI Kabel GmbH - 5 - 30A-168 817

[0024] In certain areas, such as the overlap area, the at least nearly tubular hose connection can provide protection and / or mechanical stability / stabilization for the cooling hose. Later (i.e., in an end area and / or in an area that no longer overlaps with the outer hose connection), the at least nearly tubular section can be relatively flexible. In this area, for example, the at least nearly tubular section merely guides the cooling hose and provides little or no mechanical stability / stabilization.

[0025] The hose receptacle, which is at least nearly tubular, can have a single-layer structure at least in sections. In particular, the hose receptacle, which is at least nearly tubular, can have a single-layer structure at least in sections in a radial direction. The single-layer structure can, for example, extend longitudinally along at least one section of the hose receptacle, and in particular along its entire length.

[0026] The hose receptacle, which is at least nearly tubular, can have a multi-layered structure, at least in some sections. In particular, the hose receptacle, which is at least nearly tubular, can have a multi-layered structure, at least in some sections, in a radial direction. The multi-layered structure can, for example, extend longitudinally along at least one section of the hose receptacle, and in particular along its entire length.

[0027] The hose fitting, which is at least nearly tubular, can be made of metal. Additionally or alternatively, the hose fitting, which is at least nearly tubular, can be made of plastic. For example, the hose fitting, which is at least nearly tubular, can be made of metal. Suitable metals include, for example, stainless steel, steel, brass, copper, or corresponding alloys.

[0028] In a multi-layered structure, for example, an inner layer can consist of a harder metal, such as steel, and an outer layer can consist of a softer metal, such as copper or brass. This can result in electrically advantageous deformations of the outer layer during crimping. At the same time, the harder metal of the inner layer ensures high mechanical stability.

[0029] (37) LEONI Kabel GmbH - 6 - 30A-168 817

[0030] Alternatively, in a multi-layered construction, for example, an inner layer can consist of a harder material, such as steel, and an outer layer of a softer material, such as plastic. This provides an electrically insulating hose connection. At the same time, the harder material of the inner layer ensures high mechanical stability.

[0031] The outer conductor receptacle can be made of metal or consist of metal. This allows an electrical contact to be established between the outer conductor receptacle and one or more electrical conductors of the internally cooled conductor.

[0032] The hose receptacle, which is at least nearly tubular, can have an internal thread and / or an external thread, at least in some sections. The internal thread and / or external thread can be provided, for example, at one end of the hose receptacle, particularly in an area where the outer pipe receptacle and the hose receptacle do not overlap. Fittings or other elements can be screwed onto the hose receptacle via the internal thread and / or external thread. Additionally or alternatively, the hose receptacle can have a hose nipple. The hose nipple can be crimped onto the hose receptacle, thus creating a hose coupling.

[0033] A piping system is proposed according to a second aspect. The piping system includes an internally cooled pipe. The piping system includes a connection device according to the first aspect. The internally cooled pipe includes a cooling hose. A cooling medium can be carried in the cooling hose. The pipe includes at least one electrical conductor. The at least one electrical conductor is arranged circumferentially around the cooling hose. The outer pipe receptacle of the connection device is connected to, or connectable to, the internally cooled pipe. The inner hose receptacle of the connection device is attached to, or attachable to, the cooling hose.

[0034] The connection between the outer cable receptacle and the internally cooled cable can be a crimp connection. The crimp connection can, for example, be a screw-type crimp connection. Crimping typically refers to...

[0035] (37) LEONI Kabel GmbH - 7 - 30A-168 817 a joining process in which two components are joined together by plastic deformation, for example by flanging, squeezing, pressing, crimping or folding.

[0036] The force exerted by crimping on the connection area, e.g., the pinched area, is largely absorbed by the almost tubular hose fitting. This prevents the cooling hose from collapsing inside the fitting. The full cooling capacity of the cooling hose is thus maintained.

[0037] The inner diameter of the inner hose fitting can be matched to the outer diameter of the cooling hose. For example, the inner diameter of the inner hose fitting can be at least equal to the outer diameter of the cooling hose. In other words, the inner diameter of the inner hose fitting can be equal to the outer diameter of the cooling hose or even larger. For example, the cooling hose can be fitted as precisely as possible into the hose fitting, with its outer surface and inner surface in direct contact.

[0038] The crimping force is at least almost entirely absorbed by the hose receptacle, which is provided or mounted, for example, in the core of the connection device. For this purpose, the inner diameter of the hose receptacle, which is at least almost tubular, corresponds at least to the outer diameter of the cooling hose. By appropriately selecting the material of the hose receptacle and considering its mechanical properties, the hose receptacle sufficiently withstands the crimping force of the conductor being crimped.

[0039] The required crimping force is thus absorbed by the hose receptacle to ensure a technically sound crimp. The cooling hose can exit the terminal, e.g., the cable lug, from the end face. The cooling effect of the cooling hose is therefore also transferred to the terminal, e.g., the cable lug, via the hose receptacle. It is advantageous for the inner diameter of the hose receptacle to be as close as possible to the outer diameter of the cooling hose to ensure complete or partial contact of the cooling hose with the inside of the receptacle and thus unimpeded heat flow from the terminal, e.g., the cable lug, to the medium in the cooling hose. LEONI Kabel GmbH - ß - 30A-168 817

[0040] The inner diameter of the outer pipe fitting can be matched to the outer diameter of the pipe.

[0041] The cable may also have insulation. The insulation may surround the cooling hose and the at least one electrical conductor. The inner diameter of the outer cable receptacle may be matched to the outer diameter of the cable with at least some insulation removed.

[0042] A free cross-sectional area between an outer surface of the inner hose receptacle and an inner surface of the outer cable receptacle can correspond to at least one cross-sectional area of ​​the at least one electrical conductor. In this way, the at least one electrical conductor can be contained within the connection device, in particular at least partially within the outer cable receptacle. For example, a stripped section of the at least one electrical conductor can be contained at least almost completely within the outer cable receptacle.

[0043] The at least one electrical conductor can, for example, be designed as multiple electrical conductors.

[0044] Furthermore, according to a third aspect, an on-board electrical system for a vehicle can be provided with multiple wiring systems as described in the second aspect. These wiring systems can include, in particular, high-voltage cables, e.g., single-core high-voltage cables. The high-voltage cables can be shielded or unshielded. A combination of shielded and unshielded cables is also conceivable.

[0045] Even though some of the aspects described above have been described in relation to the receiving device according to the first aspect, these aspects can also be implemented in a corresponding way in the piping system according to the second aspect and / or the on-board network according to the third aspect, and vice versa.

[0046] The present invention will be further explained with reference to figures. These figures schematically show: LEONI Kabel GmbH - 9 - 30A-168 817

[0047] Figure 1a shows a section of a side view of a connection device according to an exemplary embodiment;

[0048] Figure 1b shows a cross-section of a connection device according to the embodiment shown in Figure 1a;

[0049] Figure 2 shows a section of a side view of a variant of the connection device according to the embodiment shown in Figure 1a;

[0050] Figure 3 shows a cross-section of an internally cooled conduit that can be connected to the connection devices shown in Figures 1a, 1b and 2;

[0051] Figure 4 shows a section of a side view of a piping system in which an internally cooled piping is connected to the connection device from Figures 1a and 1b; and

[0052] Figure 5 shows a cross-sectional view of a side view of a variant of the piping system from Figure 4, in which a hose nipple is additionally provided at the end.

[0053] Specific details are set forth below, without limitation, to provide a complete understanding of the present invention. However, it is clear to a person skilled in the art that the present invention can be used in other embodiments that may differ from the details set forth below. Furthermore, the figures serve only to illustrate embodiments. They are not to scale and are intended only to reflect the general concept of the invention by way of example. For instance, features included in the figures should by no means be considered a necessary component.

[0054] Figure 1a shows a connection device 100 for an internally cooled line. The connection device 100 is designed as a cable lug in Figure 1a and the subsequent figures and is therefore referred to as the cable lug 100 in relation to the figures. The cable lug 100 has an outer cable receptacle 160. The outer cable receptacle serves for connection to an internally cooled line (not shown in Figure 1a). The cable lug 100 has an inner, at least nearly tubular, hose receptacle 120 arranged in the outer cable receptacle 160.

[0055] (37) LEONI Kabel GmbH - 10 - 30A-168 817

[0056] The hose receptacle 120, which is at least nearly tubular, serves to receive at least a section of a cooling hose arranged in the internally cooled line (not shown in Figure 1a). The tubular structure of the hose receptacle 120 is clearly visible in Figure 1b, which shows a cross-section of the cable lug 100.

[0057] The cable receptacle 160 has an inlet opening and an outlet opening for the hose receptacle 120. The inlet opening of the cable receptacle 160 can, for example, be used to accommodate the internally cooled cable. The hose receptacle 120 also has an inlet opening and an outlet opening. The inlet opening of the hose receptacle 120 can, for example, be used to accommodate the cooling hose. The hose receptacle 120 can be formed as a single piece.

[0058] The hose receptacle 120, which is at least nearly tubular, is designed as a tubular form in the figures and is therefore also referred to as the tubular hose receptacle 120 or simply as the hose receptacle 120. In the exemplary embodiment shown in Figures 1a and 1b, the tubular hose receptacle 120 has an at least nearly round cross-sectional shape (see Figure 1b). Alternatively, a cross-sectional shape that is at least nearly non-round is also conceivable, for example, a polygonal (e.g., hexagonal) cross-sectional shape. In particular, an outer wall of the hose receptacle 120 can have the polygonal cross-sectional shape. The tubular hose receptacle 120 can also be capillary-shaped and be referred to as a capillary.

[0059] The hose fitting 120, e.g., capillary tube, is pressed or screwed into the pipe fitting 160 in the example shown, or rigidly connected to the pipe fitting 160. In all these exemplary cases, displacement or movement of the two parts (hose fitting 120 and pipe fitting 160) relative to each other in the longitudinal direction is prevented / not possible.

[0060] The cable lug 100 shown in Figures 1a and 1b is designed as an exemplary ring cable lug. Thus, the outer conductor receptacle 160 has a cross-sectional shape that is at least nearly ring-shaped or round, in particular circular, for connection with a round, in particular circular, conductor. However, in particular, an outer wall of the conductor receptacle 160 can also have a non-round, for example polygonal, cross-sectional shape.

[0061] (37) LEONI Kabel GmbH - 11 - 30A-168 817

[0062] In the embodiment shown in Figures 1a and 1b, the tubular hose receptacle 120 has a single-layer structure. The tubular hose receptacle 120 has a strength and / or stiffness that is greater than the strength and / or stiffness of the cooling hose of the line to which the cable lug 100 is to be connected. For this purpose, the tubular hose receptacle 120 can, for example, be formed on a metal surface. In Figure 1a, the tubular hose receptacle 120 has an exemplary straight shape. However, it can also have a curved shape, for example, in certain sections.

[0063] The cable lug 100 has a bore 180 at its end. The cable lug 100 can be attached via the bore 180. For example, the cable lug 100 can be attached to the body of a vehicle via the bore 180 to be connected to a wire of the vehicle's electrical system.

[0064] Figure 2 shows a variant of the cable lug 100 from Figures 1a and 1b. The variant of the cable lug 100 from Figure 2 differs from the cable lug 100 from Figures 1a and 1b in that the tubular hose receptacle 120 is not single-layered, but multi-layered. In Figure 2, the tubular hose receptacle 120 is shown as an example of a two-layered design, i.e., it has an inner layer 122 and an outer layer 124. The inner layer 122 has a higher strength and / or stiffness than the outer layer 124. In other words, the inner layer 122 is made of a harder material than the outer layer 124. For example, the inner layer 122 can be made of a metal, while the outer layer 124 is made of a plastic. The plastic outer layer 124 thus also provides electrical insulating properties. Alternatively, the inner layer 122 can be made of a harder metal (e.g.,The inner layer 122 is made of a softer metal (e.g., copper or brass). The softer outer layer 124 allows for advantageous deformations during joining processes, such as crimping. The harder inner layer 122 simultaneously provides reliable protection for the cooling hose.

[0065] Figure 3 shows a cross-section of a cable 1000. The cable 1000 serves as an example of a cable that can be connected to the cable lug 100 from Figures 1a and 1b or the cable lug from Figure 2. The cable 1000 has a cooling hose 1200 and several electrical conductors 1600 that are not insulated from each other, as an example of the fact that at least one electrical conductor is provided. A cooling medium 1400 can be carried in the cooling hose 1200. More precisely, the cooling hose 1200 from Figure 3 has, by way of example, a sheathing, an outer jacket, or

[0066] (37) LEONI Kabel GmbH - 12 - 30A-168 817 an outer sheath and an interior that is at least largely hollow. The cooling medium 1400 can be carried in the interior. The outer sheath can also be referred to as an insulating sheath and will mainly be referred to as such in the following.

[0067] The multiple electrical conductors 1600 are arranged circumferentially around the cooling hose 1200. In the example shown in Figure 3, the electrical conductors 1600 are each in direct contact with the outside (the outer surface) of the cooling hose 1200, for example, the outside of the insulating sheath of the cooling hose 1200. The multiple electrical conductors 1600 each have a circular cross-section. Alternatively, other circular cross-sectional shapes are conceivable.

[0068] The electrical conductors 1600 can each consist of, or be formed from, individual wires, stranded conductors, or braids. A round, particularly circular, shape can be achieved, for example, by a concentrically constructed strand. In concentrically constructed strands, each individual wire has a defined position within the strand. One or more layers of wire are arranged concentrically around a central wire. In concentrically constructed strands, the individual wires occupy a precisely defined position around the inner core wire. This results in an absolutely regular structure.

[0069] The electrical conductors 1600 are each connected to a system section AFR on the cooling hose 1200.

[0070] The cooling hose 1200 is at least nearly impermeable to the cooling medium 1400. This means that, in a normal, undamaged condition, the cooling medium cannot normally escape from the interior of the cooling hose 1200. The insulating sheath of the cooling hose 1200 is, in an undamaged condition, at least nearly impermeable to the cooling medium. Therefore, the electrical conductors 1600 do not come into contact with the cooling medium 1400 in an undamaged cooling hose 1200. The electrical conductors 1600, or more precisely, the entirety of the electrical conductors 1600 (not each individual conductor), as well as the cooling hose 1200, are surrounded by insulation 1800. The insulation 1800 serves, among other things, to provide electrical insulation for the electrical conductors 1600.

[0071] (37) LEONI Kabel GmbH - 13 - 30A-168 817

[0072] Figure 4 shows an example of a conductor system 1 in which a conductor 1000 from Figure 3 is connected to a cable lug 100 from Figures 1a and 1b. Instead of the cable lug 100 from Figures 1a and 1b, the cable lug 100 from Figure 2 can also be connected to the conductor 1000 from Figure 3.

[0073] The conduit system 1 includes, by way of example, the internally cooled conduit 1000 from Figure 3 and a cable lug 100 according to the embodiment shown in Figures 1a and 1b. The internally cooled conduit 1000 has a cooling hose 1200 in which a cooling medium 1400 can be conveyed. The internally cooled conduit 1000 also includes, by way of example, several electrical conductors 1600, as an example of the possibility of at least one electrical conductor 1600 being provided. The several electrical conductors 1600 are arranged circumferentially around the cooling hose 1200. The outer conductor receptacle 160 of the cable lug 100 is connected to the internally cooled conduit 1000. The inner hose receptacle 120 of the cable lug 100 is mounted on the cooling hose 1200.

[0074] An overlap area between the outer cable receptacle 160 and the electrical conductors 1600 defines a connection area VB, in which the connection of the cable lug 100 to the cable 1000 is established or effected. For example, the connection is made as a crimp connection by crimping. As can be seen in Figure 4, the hose receptacle 120 does not extend along the entire length of the cooling hose 1200, but only along a section. In any case, the hose receptacle 120 extends at least within the connection area VB. Thus, the inner hose receptacle 120 is located at least in the area where forces generated or acting during the establishment of the connection, e.g., by crimping, could lead to damage to the cooling hose 1200. These forces are absorbed by the hose receptacle 120 and prevented from affecting the cooling hose 1200. As a result, the cooling hose 1200 remains intact despite the forces acting on the cable 1000 from the outside.

[0075] As can be seen in Figure 4, the inner diameter of the outer cable receptacle 160 is matched to the outer diameter of the internally cooled cable 1000. More precisely, the inner diameter of the outer cable receptacle 160 is matched to the outer diameter of the internally cooled cable 1000 with at least some insulation 1800 removed. Even more precisely, the inner diameter of the outer cable receptacle 160 corresponds essentially or at least almost exactly to the outer diameter of the internally cooled cable 1000 with at least some insulation 1800 removed. This allows the cable lug 100

[0076] (37) LEONI Kabel GmbH - 14 - 30A-168 817 are placed directly on the electrical conductors 1600. As can be seen in Figure 4, this results in electrical contact between the electrical conductors 1600 and the outer conductor holder 160.

[0077] The inner diameter of the inner hose receptacle 120 is matched to the outer diameter of the cooling hose 1200. More precisely, the inner diameter of the inner hose receptacle 120 is at least equal to the outer diameter of the cooling hose 1200. In the example shown in Figure 4, the inner diameter of the hose receptacle 120 is slightly larger than the outer diameter of the cooling hose 1200. This ensures that the outer wall of the cooling hose 1200 fits almost perfectly against the inner wall of the hose receptacle 1200. In this way, the cooling hose 1200 is well protected by the hose receptacle 1200, and at the same time, efficient heat transfer to cool the electrical conductors 1600 via the cooling medium 1400 within the cooling hose 1200 takes place. As can be seen in the example shown in Figure 4, the hose receptacle 120 is positioned so that it slides between the cooling hose 1200 and the electrical conductors 1600.This allows the cooling hose 1200 to be inserted into the hose receptacle 120, and the hose receptacle 120 is located between the cooling hose 1200 and the electrical conductors 1600.

[0078] Due to the dimensioning measures outlined above, a free cross-sectional area between an outer surface of the inner hose receptacle 120 and an inner surface of the outer cable receptacle 160 corresponds at least to the cross-sectional area of ​​the multiple electrical conductors 1600. In the example shown in Figure 4, the free cross-sectional area between the outer surface of the inner hose receptacle 120 and the inner surface of the outer cable receptacle 160 corresponds at least almost exactly to the cross-sectional area of ​​the multiple electrical conductors 1600. In this way, the crimp connection can be improved.

[0079] According to one variant, the hose receptacle 120 can have a first section with a first strength and / or stiffness. This first section can at least include the connection area VB, where the connection takes place. Furthermore, the first section can extend even further towards the inlet of the cable lug 100, i.e., to the left in Figure 4. In Figure 4, however, the hose receptacle ends by way of example at the connection area VB. This first section can, for example, also correspond exactly to the connection area VB, e.g.

[0080] B. an area where crimping normally takes place. The first section can either begin and end with the connection area VB or extend

[0081] (37) LEONI Kabel GmbH - 15 - 30A-168 817, for example, can extend further on the inlet side (left in Figure 4) and / or on the outlet side (right in Figure 4). Furthermore, the tubular hose receptacle 120 can have a second section with a second strength and / or stiffness that is less than the first strength and / or stiffness. The second section can, for example, be an outlet area (right in Figure 4) that lies outside the cable receptacle 160. The second section can also begin at the point where the connection area VB ends or slightly offset from it on the outlet side. Regardless of the exact starting point, the second section can extend further on the outlet side, i.e., in particular, in an area that does not overlap the cable receptacle 160 longitudinally.In this case, the second section, after exiting the cable lug 100, primarily or solely provides a guiding effect for the hose 1200 and little or no mechanical stability or stabilization. The second section of the tubular hose receptacle 120 is, for example, a plastic hose. The plastic hose can, for instance, be pushed onto the first section. The inner wall of the plastic hose can be connected to the first section.

[0082] The first section can extend beyond the end (to the right) of the connection area VB in Figure 4. In this so-called transition area, the first section can have a structured outer circumferential surface, at least in a portion of the transition area, or be enclosed by an annular coupling element. In this context, "structured" can mean that the surface in that portion has indentations and / or a higher surface roughness compared to an unstructured area of ​​the transition area. Both features, the structuring and the coupling element, serve to improve the connection with the second section, for example, a second section designed as a plastic hose.

[0083] The described design absorbs the force acting on the crimp area of ​​the cable lug 100 by the hose receptacle 120. This protects the core of the cooling hose 1200 from collapse, thus preserving its full cooling capacity. The hose receptacle 120, located in the core of the cable lug 100 and designed, for example, as a capillary, absorbs the crimping force. Its inner diameter is at least equal to the outer diameter of the cooling hose 1200. The material of the hose receptacle 120, e.g., the capillary material, is selected such that its mechanical properties are sufficient to withstand the crimping force of the cable 1000 being crimped. The free cross-sectional area around the hose receptacle 120, e.g., the capillary, and the

[0084] (37) LEONI Kabel GmbH - 16 - 30A-168 817 the actual cable lug 100 corresponds here to at least the cross-sectional area of ​​the conductors 160, e.g. of the copper, of the line 1000, e.g. high-voltage line.

[0085] The advantage of the embodiments described herein is that the required crimping force is absorbed by the hose receptacle 120, e.g., a capillary tube, to ensure a technically sound crimp. The hose 1200 can be led out of the end face of the cable lug 100. The cooling effect of the cooling hose 1200 thus also acts on the cable lug 100 via the hose receptacle 120, e.g., the capillary tube. Therefore, the inner diameter should ideally be matched as closely as possible to the outer diameter of the hose to ensure complete or partial contact of the hose 1200 with the inside of the hose receptacle 120, e.g., the capillary tube, and thus to achieve an unimpeded heat flow from the cable lug 100 to the medium 1400 in the hose 1200.

[0086] As an alternative to the single-layer variant shown, the tubular hose receptacle 120 can have a multi-layer structure at least in sections, as described with reference to Figure 2.

[0087] Figure 5 shows a variant of the piping system 1 from Figure 4. In Figure 5, the tubular hose receptacle 120 has a hose nipple 126 at its end. The hose nipple can be inserted using a crimping technique. The hose nipple 126 can then be crimped to the hose receptacle 120, e.g., the capillary tube, thus creating a hose coupling.

[0088] As an alternative to the hose nipple 126, an internal and / or external thread can be provided at the end. Fittings or other elements, e.g., capillaries, can be screwed onto the end of the hose fitting 120 via the internal and / or external thread.

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Claims

LEONI Kabel GmbH - 17 - 30A-168 817 Patent claims 1. Connection device (100), in particular cable lug, for an internally cooled line (1000), wherein the connection device (100) comprises: an outer line receptacle (160) for connection with the internally cooled line (1000); and an inner, at least nearly tubular hose receptacle (120), in particular a capillary, arranged at least partially in the outer line receptacle (160), for receiving at least a section of a cooling hose (1200) arranged in the internally cooled line (1000).

2. Connection device (100) according to claim 1, wherein the at least nearly tubular hose receptacle (120) has an at least nearly round cross-sectional shape or an at least nearly non-round cross-sectional shape.

3. Connection device (100) according to claim 1 or 2, wherein the outer cable receptacle (160) has a cross-sectional shape that is at least nearly annular.

4. Connection device (100) according to one of claims 1 to 3, wherein the at least nearly tubular hose receptacle (120) has at least a straight shape and / or at least a curved shape in sections.

5. Connection device (100) according to one of claims 1 to 4, wherein the at least nearly tubular hose receptacle (120) has a first section with a first strength and / or stiffness.

6. Connection device (100) according to one of claims 1 to 5, wherein the at least nearly tubular hose receptacle (120) has a second section with a second strength and / or stiffness which is less than the first strength and / or stiffness.

7. Connection device (100) according to one of claims 1 to 6, wherein the at least nearly tubular hose receptacle (120) has a single-layer structure at least in sections and / or has a multi-layer structure at least in sections. (37) LEONI Kabel GmbH - 18 - 30A-168 817 8. Connection device (100) according to one of claims 1 to 7, wherein the at least nearly tubular hose receptacle (120) comprises a metal, for example, is made of a metal, and / or a plastic.

9. Connection device (100) according to one of claims 1 to 8, wherein the at least nearly tubular hose receptacle (120) has at least partially an internal thread and / or an external thread and / or a hose nipple.

10. Conduit system (1) comprising: an internally cooled conduit (1000); a connection device (100) according to any one of claims 1 to 9; wherein the internally cooled conduit (1000) comprises: - a cooling hose (1200) in which a cooling medium (1400) can be carried; and - at least one electrical conductor (1600), wherein the at least one electrical conductor (1600) is arranged around the cooling hose (1200) in the circumferential direction of the cooling hose (1200); wherein the outer conductor receptacle (160) is connected or connectable to the internally cooled line (1000); and wherein the inner hose receptacle (120) is applied or can be applied to the cooling hose (1200).

11. Conduit system (1) according to claim 10, wherein an inner diameter of the inner hose receptacle (120) is matched to an outer diameter of the cooling hose (1200).

12. Conduit system (1) according to claim 10 or 11, wherein the inner diameter of the inner hose receptacle (120) corresponds at least to the outer diameter of the cooling hose (1200).

13. Conduit system (1) according to one of claims 10 to 12, wherein an inner diameter of the outer conduit receptacle (160) is matched to the outer diameter of the internally cooled conduit (1000).

14. Conduit system (1) according to one of claims 10 to 13, wherein the internally cooled conduit (1000) further comprises insulation (1800), wherein the insulation (1800) insulates the cooling hose (1200) and the at least one electrical conductor (1600) (37) LEONI Kabel GmbH - 19 - 30A-168 817 surrounds and the inner diameter of the outer conductor receptacle (160) is matched to the outer diameter of the internally cooled conductor (1000) with at least partially removed insulation (1800).

15. Conductor system (1) according to one of claims 10 to 14, wherein a free The cross-sectional area between an outer surface of the inner hose receptacle (120) and an inner surface of the outer cable receptacle (160) corresponds to at least one cross-sectional area of ​​the at least one electrical conductor (1600).

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