Electrical connection assembly, in particular for use in electric vehicles or hybrid vehicles

Abstract

The invention relates to an electrical connection assembly (1), in particular for use in electric vehicles or hybrid vehicles, comprising a first electrical and / or electronic component (10) and a second electrical and / or electronic component (20), wherein: the first electrical and / or electronic component (10) is electrically conductively connected to the second electrical and / or electronic component (20) by a first busbar connection (40) and by a second busbar connection (50); the first busbar connection (40) is electrically isolated from the second busbar connection (50); the first busbar connection (40) extends, at least in part, parallel to the second busbar connection (50); the first busbar connection (40) is spaced from the second busbar connection (50) by an intermediate space (60); and the connection assembly (1) furthermore comprises an isolating part (30) which is situated, at least in part, between the first busbar connection (40) and the second busbar connection (50) and, in the intermediate space (60), isolates the first busbar connection (40) from the second busbar connection (50). The invention proposes that the first busbar connection (40) comprises a connection busbar (41) which lies on a support surface (31) of the isolating part (30) and which is fastened to the isolating part (30).

Description

[0001] Description

[0002] title

[0003] Electrical connection arrangement, particularly for use in electric vehicles or hybrid vehicles

[0004] State of the art

[0005] The invention relates to an electrical connection arrangement, in particular for use in electric vehicles or hybrid vehicles, having the features of the preamble of independent claim 1.

[0006] In power electronics, for example in electric vehicles or hybrid vehicles, electrical and / or electronic components that carry high electrical currents are connected to one another. Due to the high electrical currents, current-carrying elements through which the electrical and / or electronic components are connected to one another must have correspondingly low electrical resistances and thus large cross-sections. Repeated switching operations result in frequency-dependent high power losses due to alternating currents. It is known that planar and parallel current conduction and the magnetic interaction between current layers caused by opposite current directions result in a significant reduction in the inductance resulting from the switching operations and thus significantly reduced power losses. In such arrangements, current is carried via busbars.For example, two busbars with opposite current directions, a forward conductor and a return conductor, are routed directly above each other and parallel to each other at a short distance. For connections between different electrical and / or electronic components, this parallel and superimposed routing of the busbars is interrupted in the area where the busbars of a first electrical and / or electronic component are connected to the busbars of a second electrical and / or electronic component, to create a secure and fixed connection, for example, a screw connection or a welded connection.This interruption of the superimposed routing of the busbars leads to increased inductances and concomitant increased losses in the arrangement in the area in which the busbars of the first electrical and / or electronic component are connected to the busbars of the second electrical and / or electronic component.

[0007] Disclosure of the invention

[0008] According to the invention, an electrical connection arrangement is proposed, in particular for use in electric vehicles or hybrid vehicles. The connection arrangement comprises a first electrical and / or electronic component and a second electrical and / or electronic component, wherein the first electrical and / or electronic component is electrically conductively connected to the second electrical and / or electronic component by a first busbar connection and by a second busbar connection, wherein the first busbar connection is electrically insulated from the second busbar connection, wherein the first busbar connection runs at least partially parallel to the second busbar connection, wherein the first busbar connection is spaced from the second busbar connection by a gap, wherein the connection arrangement further comprises an insulating part,which is arranged at least partially between the first busbar connection and the second busbar connection and insulates the first busbar connection from the second busbar connection in the intermediate space. According to the invention, the first busbar connection comprises a connecting busbar that rests on a support surface of the insulating part and is fastened to the insulating part. Advantages of the invention,

[0009] Compared to the prior art, the electrical connection arrangement has the advantage that the connecting busbar is connected to the insulating part and thus, when the connecting busbar is mounted in the electrical connection arrangement, the insulating part is positioned and mounted at the same time. The connecting busbar, together with the insulating part, can thus form an assembly that is mounted together in the electrical connection arrangement. The insulating part electrically insulates the connecting busbar from the second busbar connection. The insulating part advantageously allows the first busbar connection to be routed close to the second busbar connection. In this way, an advantageously low-inductance connection can be achieved between the first electrical and / or electronic assembly and the second electrical and / or electronic assembly.

[0010] Further advantageous embodiments and developments of the inventions are made possible by the features specified in the subclaims.

[0011] According to an advantageous exemplary embodiment, at least one first connecting lug and at least one second connecting lug are formed on the connecting busbar, wherein the first connecting lug and the second connecting lug protrude from the insulating part, in particular in opposite directions. The first connecting lug runs, for example, in a plane that is plane-parallel to the support surface of the insulating part. The second connecting lug runs, for example, in a plane that is plane-parallel to the support surface of the insulating part. The connecting lugs serve to connect the connecting busbar to connection points of the electrical and / or electronic components or to other busbars. The connecting lugs can, for example, be welded to connection points of the electrical and / or electronic components.The connecting lugs of the connecting busbar can, for example, be welded to other busbars.

[0012] According to an advantageous embodiment, a wall is formed on the insulating part, in particular on an edge of the insulating part, which wall protrudes from the support surface of the insulating part and projects beyond the connecting busbar in a direction perpendicular to the support surface. The wall increases the shortest connection between the connecting busbar and the second busbar connection around the insulating part. Thus, the air gap and / or the creepage distance between the connecting busbar and the second busbar connection is increased. The dimensions and, in particular, the height of the wall allow the electrical connection arrangement to be easily adapted to creepage distance specifications.

[0013] According to an advantageous embodiment, a recess is formed in the connecting busbar, wherein a connecting element is formed on the insulating part, which protrudes from the support surface of the insulating part, wherein the connecting element protrudes through the recess in the connecting busbar. The connecting element mechanically fastens the connecting busbar to the insulating part.

[0014] According to an advantageous embodiment, a groove is formed in the connecting element, into which a holding region of the connecting busbar projects, so that the connecting busbar is fastened to the insulating part in a direction perpendicular to the support surface. The groove is formed in the connecting element, in particular, parallel to the support surface. The holding region of the connecting busbar projects into the groove of the connecting element in a direction parallel to the support surface. The groove forms an undercut through which the connecting busbar is held to the insulating part in a direction perpendicular to the support surface.

[0015] According to an advantageous embodiment, it is provided that at least two first connecting tabs are formed on the connecting busbar, which protrude in particular in the same direction from the insulating part, wherein the two first connecting tabs are separated from one another by a slot, wherein the recess is formed at one end of the slot. The two first connecting tabs run in particular in the same plane. The slot can simultaneously compensate for tolerances and provide the recess. According to an advantageous embodiment, it is provided that at least one holding element of the insulating part protrudes from the support surface, wherein an edge of the connecting busbar rests against the holding element. The holding element holds the connecting busbar in the groove. The connecting busbar is arranged between the holding element and the connecting element.The connecting busbar is held by the connecting element and the retaining element. The connecting busbar is clipped into the groove of the connecting element between the connecting element and the retaining element. This allows for the assembly of the connecting busbar and insulating part to be manufactured with ease.

[0016] According to an advantageous embodiment, at least two, particularly spaced-apart, retaining elements of the insulating part protrude from the support surface, with the edge of the connecting busbar resting against both retaining elements. The two retaining elements, together with the connecting element, thus form three points at which the connecting busbar is held to the insulating part. The connecting busbar is thus fixed to the insulating part and also protected against rotation about an axis perpendicular to the support surface.

[0017] According to an advantageous embodiment, it is provided that the connecting busbar overlaps the insulating part in a bridge-like manner.

[0018] According to an advantageous embodiment, it is provided that the second busbar connection comprises a first busbar and a second busbar electrically connected to the first busbar, wherein the first busbar protrudes from the first electrical and / or electronic component and the second busbar protrudes from the second electrical and / or electronic component.

[0019] Short description of the drawings

[0020] An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description. Fig. 1 shows an embodiment of the electrical connection arrangement,

[0021] Fig. 2 shows a cross section through the embodiment of the electrical connection arrangement from Fig.1,

[0022] Fig. 3 shows the insulating part and the first busbar of the embodiment of the electrical connection arrangement from Fig. 1,

[0023] Fig. 4 shows a cross-section through the insulating part and the first busbar from Fig. 3.

[0024] Embodiments of the invention

[0025] The connection arrangement 1 can be used, for example, in systems that carry high currents, for example in power electronics, for example in electric vehicles or hybrid vehicles.

[0026] The connection arrangement 1 comprises a first electrical and / or electronic component 10 and a second electrical and / or electronic component 20. The electrical and / or electronic components 10, 20 can be or include, for example, inverters, converters, DC / DC converters, capacitors such as intermediate circuit capacitors, batteries, busbars, or, for example, other electronic and / or electrical components that are used, for example, in electric vehicles or hybrid vehicles or in other power electronics systems. In the exemplary embodiment illustrated in the figures, the first electrical and / or electronic component 10 is designed as an intermediate circuit capacitor, and the second electrical and / or electronic component 20 is designed as a signaled circuit breaker.

[0027] The first electrical and / or electronic component 10 is connected to the second electrical and / or electronic component 20 by a first busbar connection 40. The first busbar connection 40 can comprise one or more interconnected, flat busbars 41, 49. In the exemplary embodiment shown in the figures, the first busbar connection 40 comprises a connecting busbar 41 and a connecting busbar 49. The connecting busbar 49 protrudes from the first electrical and / or electronic component and is electrically connected thereto. The connecting busbar 49 is electrically connected to the connecting busbar 41, for example, welded thereto. The connecting busbar 49 is connected flat to the connecting busbar 41. The connecting busbar 41 is electrically connected to the second electrical and / or electronic component 20.The connecting busbar 41 is connected, for example, welded, to an electrical connection point of the electrical and / or electronic component 20. The connection points of the second electrical and / or electronic component 20 can be formed, for example, on a power substrate, for example a DBC substrate, of the electrical and / or electronic component 20.

[0028] The connecting busbar 41 is formed as a bent sheet metal. At least one first connecting lug 42 and at least one second connecting lug 43 are formed on the connecting busbar 41. In this exemplary embodiment, a plurality of, in particular four, first connecting lugs 42 are formed on the connecting busbar 41. The first connecting lugs 42 are separated from one another by slots 48 in the connecting busbar 41. The first connecting lugs 42 extend flatly, in particular in the same plane. Furthermore, in this exemplary embodiment, a plurality of, in particular two, second connecting lugs 43 are formed on the connecting busbar 41. The second connecting lugs 43 are spaced apart from one another. The second connecting lugs 43 extend flatly, in particular in the same plane.The first connecting tabs 42 and the second connecting tabs 43 protrude, in particular in mutually opposite directions, from the insulating part 30. The first connecting tabs 42 extend towards the first electrical and / or electronic component 10. The first connecting tabs 42 are electrically connected, in particular welded, to the connecting busbar 49. The second connecting tabs 43 extend towards the second electrical and / or electronic component 20. The second connecting tabs 43 are electrically connected to the second electrical and / or electronic component 20, in particular welded to connection points of the second electrical and / or electronic component 20. The connection points of the second electrical and / or electronic component 20 can be formed, for example, on a power substrate, for example a DBC substrate, of the electrical and / or electronic component 20.

[0029] Furthermore, the first electrical and / or electronic component 10 is connected to the second electrical and / or electronic component 20 by a second busbar connection 50. The second busbar connection 50 can comprise one or more interconnected, flat busbars 51, 52. In this exemplary embodiment, the second busbar connection 50 comprises a first busbar 51 and a second busbar 52. The first busbar 51 is electrically connected, for example welded, to the second busbar 52. The first busbar 51 protrudes from the first electrical and / or electronic component 10. The first busbar 51 is electrically connected to the first electrical and / or electronic component 10. The second busbar 52 is electrically connected to the second electrical and / or electronic component 20.The second busbar 52 is electrically connected to the second electrical and / or electronic component 20, in particular welded to connection points of the second electrical and / or electronic component 20. The connection points of the second electrical and / or electronic component 20 can be formed, for example, on a power substrate, for example a DBC substrate, of the electrical and / or electronic component 20.

[0030] The connecting busbar 41, the connecting busbar 49, the first busbar 51 and the second busbar 52 are busbars 41, 49, 51, 52, respectively.

[0031] In the context of the present application, a busbar 41, 49, 51, 52 is understood to be an electrically conductive flat conductor, for example an electrically conductive bar, an electrically conductive strip or an electrically conductive sheet. A busbar 41, 49, 51, 52 can thus be a busbar, for example. The busbars 41, 49, 51, 52 can, for example, bent or curved or can also run in a curved or stepped manner. The busbars 41, 49, 51, 52 are made of an electrically conductive material, for example a metal such as copper. The busbars 41, 49, 51, 52 are each formed in one piece. The busbars 41, 49, 51, 52 are each formed from the same material throughout. The first busbar connection 40 is electrically insulated from the second busbar connection 50.The first busbar connection 40 runs, at least in sections, plane-parallel to the second busbar connection 50. The first busbar connection 40 is spaced from the second busbar connection 50 by a gap 60. The current flows in the first busbar connection 40 in the opposite direction to the second busbar connection 50. The first busbar connection 40 runs close to the second busbar connection 50, so that when current flows in opposite directions, a low-inductance connection exists between the first electrical and / or electronic component 10 and the second electrical and / or electronic component 20 due to electromagnetic interactions.

[0032] As shown in Fig. 2, the second busbar connection 50 is arranged directly below the first busbar connection 40. The first busbar 51 is arranged directly below the connecting busbar 41. The second busbar 52 is arranged directly below the connecting busbar 41. The first busbar 51 is arranged directly below the connecting busbar 49 and directly below the connecting busbar 41. In the context of the present application, an object is understood to mean the first busbar connection 40, the second busbar connection 50, the connecting busbar 41, the connecting busbar 49, the first busbar 51, or the second busbar 52.If a first object is arranged directly beneath a second object, this is understood in the context of the present application to mean that the first object and the second object are arranged relative to one another such that a perpendicular projection of the first object onto the plane of the support surface 31 and a perpendicular projection of the second object onto the plane of the support surface 31 have at least an intersection. The connecting busbar 41 is spaced from the second busbar 52 by a minimum distance that is smaller than a width and / or a length of the connecting busbar 41.

[0033] The electrical connection arrangement 1 further comprises an insulating part 30. The insulating part 30 is arranged between the first busbar connection 40 and the second busbar connection 50. The insulating part 30 is arranged in the intermediate space 60. The insulating part 30 insulates the first busbar connection 40 from the second busbar connection 50. The insulating part 30 is made of an electrically insulating material, for example a plastic. The insulating part 30 is, for example, formed in one piece. The insulating part 30 is, for example, formed continuously from the same material. The insulating part 30 is, for example, mirror-symmetrical. For example, both the connecting busbar 41 and the insulating part 30 are mirror-symmetrical with respect to the same mirror plane.

[0034] A support surface 31 is formed on the insulating part 30. The first connecting busbar 41 rests on the support surface. The support surface 31 is, for example, flat. The connecting busbar 41 runs essentially plane-parallel to the support surface 31 in one area, in particular in the area in which the connecting busbar 41 rests on the support surface 31. The connecting busbar 41 rests essentially flatly on the support surface 31. A connecting element 33 is formed on the insulating part 30. The connecting element 33 protrudes from the support surface 31. The connecting element 33 protrudes through the connecting busbar 41. For this purpose, a recess 45 is formed in the connecting busbar 41. The connecting element 33 is, for example, pin-shaped. The connecting element 33 has, for example, a cylindrical or conical shape. A groove 34 is formed in the connecting element 33.The groove 34 extends in a plane parallel to the support surface 31. A holding region 46 of the connecting busbar 41, which is formed in particular on an edge of the connecting busbar 41, is arranged in the groove 34. The holding region 46 of the connecting busbar 41 is inserted into the groove 34 of the connecting element 33. As a result, the connecting busbar 41 is held on the insulating part 30 in a direction perpendicular to the support surface 31.

[0035] At least one holding element 35 of the insulating part 30 protrudes from the support surface 31. In this exemplary embodiment, two holding elements 35 of the insulating part 30 protrude from the support surface 31. The holding elements 35 each have a side wall, for example. The side walls of the holding elements 35 are flat, for example. An edge 47 of the connecting busbars 41 rests against the side walls of the holding elements 35. The holding elements 35 hold the holding area 46 of the connecting busbar 41 in the groove 34 of the connecting element 33. The holding elements 35 are arranged on a side of the connecting busbar 41 opposite the groove 34. The connecting busbar 41 is clipped into the groove 34 between the connecting element 33 and the holding elements 35. The connecting busbar 41 is mechanically fastened to the insulating part 30 by means of the connecting element 33 and the holding elements 35.In the area of ​​edge 47, the connecting busbar 41 can, for example, also have an angled section. Due to the angled section, the connecting busbar 41 can be slightly clamped between the connecting element 33 and the holding elements 35, so that the holding section 46 of the connecting busbar 41 is pressed into the groove 34.

[0036] A wall 32 is formed on the insulating part 30, in particular on one edge of the insulating part 30. The wall 32 protrudes from the support surface 31 of the insulating part 30. The wall protrudes beyond the connecting busbar 41 in a direction perpendicular to the support surface 31. In this exemplary embodiment, walls 32 are formed on two opposite edges of the insulating part 30. The walls 32 increase the air gap and / or the creepage distance between the first busbar connection 40 and the second busbar connection 50.

[0037] Of course, further embodiments and mixed forms of the embodiments shown are also possible.

Claims

Claims 1. An electrical connection arrangement (1), in particular for use in electric vehicles or hybrid vehicles, comprising a first electrical and / or electronic component (10) and a second electrical and / or electronic component (20), wherein the first electrical and / or electronic component (10) is electrically conductively connected to the second electrical and / or electronic component (20) by a first busbar connection (40) and by a second busbar connection (50), wherein the first busbar connection (40) is electrically insulated from the second busbar connection (50), wherein the first busbar connection (40) runs at least partially parallel to the second busbar connection (50), wherein the first busbar connection (40) is spaced from the second busbar connection (50) by an intermediate space (60), wherein the connection arrangement (1) further comprises an insulating part (30),which is arranged at least partially between the first busbar connection (40) and the second busbar connection (50) and insulates the first busbar connection (40) from the second busbar connection (50) in the intermediate space (60), characterized in that the first busbar connection (40) comprises a connecting busbar (41) which rests on a support surface (31) of the insulating part (30) and is fastened to the insulating part (30).

2. Electrical connection arrangement according to claim 1, characterized in that at least one first connecting tab (42) and at least one second connecting tab (43) are formed on the connecting busbar (41), wherein the first connecting tab (42) and the second connecting tab (43) protrude from the insulating part (30), in particular in mutually opposite directions.

3. Electrical connection arrangement according to one of the preceding claims, characterized in that a wall (32) is formed on the insulating part (30), in particular on an edge of the insulating part (30), which wall projects from the support surface (31) of the insulating part (30) and projects beyond the connecting busbar (41) in a direction perpendicular to the support surface (31).

4. Electrical connection arrangement according to one of the preceding claims, characterized in that a recess (45) is formed in the connecting busbar (41), wherein a connecting element (33) is formed on the insulating part (30) and projects from the support surface (31) of the insulating part (30) from the insulating part (30), wherein the connecting element (33) projects through the recess (45) in the connecting busbar (41).

5. Electrical connection arrangement according to claim 4, characterized in that a groove (34) is formed in the connecting element (33), into which a holding region (46) of the connecting busbar (41) projects, so that the connecting busbar (41) is fastened to the insulating part (30) in a direction perpendicular to the support surface (31).

6. Electrical connection arrangement according to one of the preceding claims, characterized in that at least two first connecting tabs (42) are formed on the connecting busbar (41), which protrude in particular in the same direction from the insulating part (30), wherein the two first connecting tabs (42) are separated from one another by a slot (48), wherein the recess (45) is formed at one end of the slot (48).

7. Electrical connection arrangement according to one of the preceding claims, characterized in that at least one holding element (35) of the insulating part (30) projects from the support surface (31), wherein an edge (47) of the connecting busbar (41) bears against the holding element (35).

8. Electrical connection arrangement according to claim 7, characterized in that at least two, in particular spaced-apart, holding elements (35) of the insulating part (30) protrude from the support surface (31), wherein the edge (47) of the connecting busbar (41) rests against both holding elements (35).

9. Electrical connection arrangement according to one of the preceding claims, characterized in that the connecting busbar (41) overlaps the insulating part (30) in a bridge-like manner.

10. Electrical connection arrangement according to one of the preceding claims, characterized in that the second busbar connection (50) has a first Busbar (51) and a second busbar (52) electrically connected to the first busbar (51), wherein the first busbar (51) protrudes from the first electrical and / or electronic component (10) and the second busbar (52) protrudes from the second electrical and / or electronic component (20).

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