Contact arrangement comprising at least one high-voltage conductor and one high-voltage component

Abstract

Contact arrangement comprising at least one high-voltage conductor (1) and a high-voltage component (15), wherein the high-voltage conductor (1) comprises at least one flat conductor (2, 3), wherein the high-voltage component (15) comprises at least one socket (17) into which the at least one flat conductor (2, 3) is directly inserted, wherein at least one seal (7, 11) is arranged in or on a housing (4) of the high-voltage conductor (1), wherein the socket (17) is designed as a spring contact (18) with two spring arms (19) or the socket (17) is cuboid in shape and has a slot.

Description

[0001] The invention relates to a contact arrangement comprising at least one high-voltage conductor and one high-voltage component, and a high-voltage conductor.

[0002] High-voltage systems typically operate at voltages greater than 60 V. An example of a high-voltage system is the traction network of an electric vehicle. In this case, a high-voltage battery is connected via high-voltage cables to an inverter, which transforms a direct current (DC) voltage into a single- or multi-phase alternating current (AC) voltage for an electric motor. The inverter incorporates the necessary power electronics. The high-voltage battery, as well as the inverter and / or power electronics, can thus be referred to as high-voltage components.

[0003] Due to the high current densities, it is common practice to partially design high-voltage lines as flat conductors in the form of a busbar. To connect the flat conductor to the high-voltage components, a suitable transition from the flat conductor to the connection technology of the high-voltage component must be created. For example, a round conductor can be connected to the flat conductor in the transition area, and then the round conductor is connected to the high-voltage component.

[0004] From DE 10 2011 056 852 A1, a high-current power unit is known, comprising power semiconductor circuits with high-current connection elements and busbars that are electrically connected by connectors with a current stud and a socket, wherein the current stud is arranged on the high-current connection element and the socket on the busbar, or vice versa. The socket is, for example, cup-shaped and its recessed rear end section extends through a connection lug of the busbar. The socket is preferably metallurgically bonded to the connection lug by soldering or welding. Likewise, the current stud is preferably connected to the high-current connection element by soldering or welding. With this contact arrangement, round conductors can be completely dispensed with.

[0005] From US 2015 / 0072195 A1, US 2013 / 0 153 291 A1 and US 2013 / 0 217 262 A1, a contact arrangement between a high-voltage conductor and a high-voltage component in a battery unit is known, wherein the high-voltage conductor has at least one flat conductor or is designed as a flat conductor, and wherein the high-voltage component has at least one socket into which the at least one flat conductor is directly inserted.

[0006] Further contact arrangements and high-voltage conductors are known from DE 10 2014 017 081 A1 and the subsequently published DE 10 2015 213 849 A1.

[0007] The invention is based on the technical problem of further improving a contact arrangement between a high-voltage conductor and a high-voltage component.

[0008] The solution to the technical problem is achieved by a contacting arrangement with the features of claim 1. Further advantageous embodiments of the invention are set forth in the dependent claims.

[0009] The contact arrangement between at least one high-voltage conductor and a high-voltage component, wherein the high-voltage conductor has at least one flat conductor or is designed as at least one flat conductor, is characterized in that the high-voltage component has at least one socket into which the at least one flat conductor is directly inserted. This has the advantage that soldered or welded connections can be dispensed with, thus avoiding contact resistance. Furthermore, the direct use of the flat conductor as a plug contact allows for a very compact design.

[0010] In the simplest case, the flat conductor is identical to the high-voltage conductor, although it may have bends (e.g., at 90°) as needed. Furthermore, the flat conductor can have a chamfer at the end where it is inserted into the socket of the high-voltage component to facilitate insertion. The socket can, for example, be rectangular and completely enclose the flat conductor. Alternatively, the socket can also be designed as a fork or spring contact, which then only makes contact with the top and bottom surfaces of the flat conductor, with the contact area being as large as possible to minimize contact resistance.

[0011] In this arrangement, a housing is partially arranged around the at least one flat conductor, from which the portion of the at least one flat conductor protrudes, which is inserted into the high-voltage component, more precisely into its socket. Preferably, the high-voltage conductor comprises two flat conductors around which the common housing is arranged, so that, for example, the positive and negative terminals of a high-voltage battery can be contacted simultaneously.

[0012] Furthermore, at least one seal is arranged in or on the housing to prevent moisture from entering the housing. Preferably, the housing has at least two seals, namely one seal at the point where the flat conductor enters the housing and one seal at the point where the flat conductor exits the housing.

[0013] The socket is designed as a spring contact with two spring arms or cuboid-shaped with a slot.

[0014] In another embodiment, the housing is designed with at least one positioning means (for example, a positioning pin) that is inserted into a corresponding receptacle in the high-voltage component. The positioning means(s) serve both for alignment and positioning and simultaneously create a mechanical connection between the high-voltage conductor and the high-voltage component.

[0015] The housing can additionally be designed with a flange, or a flange can be arranged on the housing, by means of which the high-voltage conductor can additionally be screwed to the high-voltage component or another component.

[0016] A preferred application is use in an electric or hybrid motor vehicle.

[0017] The invention is explained in more detail below with reference to a preferred embodiment. The figures show: Fig. 1 a schematic side view of a part of a high-voltage conductor, Fig. 2 a schematic underside view of part of the high-voltage conductor, Fig. 3 a schematic representation of the positioning of the high-voltage conductor to a high-voltage component to be contacted, Fig. 4 a schematic top view of a high-voltage component, Fig. 5 a schematic representation of a socket in a first embodiment and Fig. 6 a schematic representation of a plug socket in a second embodiment.

[0018] In the Fig. 1 and Fig. Figure 2 shows a section of a high-voltage conductor 1. The high-voltage conductor 1 comprises two flat conductors 2, 3, a housing 4, and a shield 5. The flat conductors 2, 3 are routed into the housing 4, with the shield 5 being removed before entering the housing 4 and attached to the housing 4 by means of a cable tie 6. A first three-lipped seal 7 is arranged at the entrance to the housing 4. The two flat conductors 2, 3 then run parallel and unshielded inside the housing 4, with the two flat conductors 2, 3 having a right-angle bend and exiting the housing 4. This portion of the flat conductors 2, 3 protruding from the housing 4 forms plug contacts 8, 9. At the front, the plug contacts 8, 9 each have a conical chamfer 10. A further seal 11 is arranged at the exit of the flat conductors 2, 3 from the housing 4.Furthermore, the housing 4 has positioning means 12 in the form of positioning pins arranged around the plug contacts 8, 9. Finally, the housing 4 has a flange 13 with openings 14 for screw connections. The positioning means 12 can be arranged such that they prevent incorrect contact between the plug contacts 8, 9.

[0019] In the Fig. Figure 3 now schematically illustrates how the high-voltage line 1 is aligned with a high-voltage component 15, for example a high-voltage battery, using the positioning means 12. For this purpose, the high-voltage component 15 has corresponding receptacles 16 (see Figure 3). Fig. 4). The positioning means 12 are then pressed into the receptacle 16. This causes the plug contacts 8, 9 of the flat conductors 2, 3 to engage in sockets 17 (see figure). Fig. 4) the high-voltage component 15 and directly contact the high-voltage conductor 1 with the high-voltage component 15.

[0020] In the Fig. Figure 5 shows a side view of a possible embodiment of a socket 17, which is designed as a spring contact 18 with two spring arms 19. An alternative embodiment is shown in Fig. Figure 6 shows the socket 17 being cuboid in shape. The interior of the cuboid 20 can be slightly smaller than the dimensions of the flat conductor 2, 3 to ensure good contact with sufficient contact force.

[0021] It may be provided that the socket 17 has a slot in order to be bent open accordingly.

Claims

[1] Contact arrangement comprising at least one high-voltage conductor (1) and a high-voltage component (15), wherein the high-voltage conductor (1) comprises at least one flat conductor (2, 3), wherein the high-voltage component (15) comprises at least one socket (17) into which the at least one flat conductor (2, 3) is directly inserted, wherein at least one seal (7, 11) is arranged in or on a housing (4) of the high-voltage conductor (1), wherein the socket (17) is designed as a spring contact (18) with two spring arms (19) or the socket (17) is cuboid in shape and has a slot. [2] Contact arrangement according to claim 1, characterized by , that a shield (5) is arranged around the at least one flat conductor (2, 3) and is attached to the housing (4). [3] Contact arrangement according to one of claims 1 or 2, characterized by, that the housing (4) is designed with at least one positioning means (12) which is inserted into a corresponding receptacle (16) of the high-voltage component (15).

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