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

Abstract

For 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), it is proposed 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).

Description

Prior ArtThe 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.In power electronics, for example in electric vehicles or hybrid vehicles, electrical and / or electronic components which carry high electrical currents are connected to one another. Due to the high electric currents, current-carrying elements, by means of which the electrical and / or electronic components are connected to one another, must have correspondingly low electric resistances and thus have large cross sections. As a result of repeated occurrence of switching processes, frequency-dependent high power losses occur as a result of alternating currents. It is known that, due to planar and parallel current conduction and due to the magnetic interaction between current layers brought about in the opposite current direction, a significant reduction of the inductance resulting from the switching operations and thus significantly reduced power losses result. Thus, current in such arrangements is conducted via busbars, which are also called busbars. In this case, for example, two busbars with opposite current directions, one forward conductor and one return conductor, are each guided directly one above the other and parallel to one another at a small distance.In the case of connections between different electrical and / or electronic components, this parallel and superposed guidance of the busbars is interrupted in the region in which the busbars of a first electrical and / or electronic component are connected to the busbars of a second electrical and / or electronic component, in order to produce a secure and firm connection, for example a screw connection or welded connection. This interruption of the routing of the busbars lying one above the other leads to increased inductances and associated increased losses in the arrangement in the region 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.Disclosure of the InventionAccording to the invention, an electrical connection arrangement, in particular for use in electric vehicles or hybrid vehicles, is proposed. 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 apart from the second busbar connection by a space, 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 isolates the first busbar connection from the second busbar connection in the space. According to the invention, the first busbar connection comprises a connecting busbar which rests on a bearing surface of the insulating part and is fastened to the insulating part.Advantages of the InventionCompared to the prior art, the electrical connection arrangement has the advantage that the connection busbar is connected to the insulating part and therefore the insulating part is simultaneously positioned and mounted when the connection busbar is mounted in the electrical connection arrangement. Thus, the connecting busbar together with the insulating part can form an assembly which is mounted together in the electrical connection arrangement. The connecting busbar is electrically insulated from the second busbar connection by the insulating part. The first busbar connection can advantageously be guided close to the second busbar connection by the insulating part. Thus, an advantageously low-inductance connection can be achieved between the first electrical and / or electronic assembly and the second electrical and / or electronic assembly.Further advantageous embodiments and developments of the invention are made possible by the features specified in the dependent claims.According to an advantageous exemplary embodiment, it is provided that at least one first connecting tab and at least one second connecting tab is formed on the connecting busbar, wherein the first connecting tab and the second connecting tab project from the insulating part, in particular in mutually opposite directions. The first connecting tab runs, for example, in a plane parallel to the bearing surface of the insulating part. The second connecting tab runs, for example, in a plane parallel to the bearing surface of the insulating part. The connecting tabs serve for the connection of the connecting current rail to connection points of the electrical and / or electronic components or to other busbars. The connecting lugs can be welded, for example, to connection points of the electrical and / or electronic components. The connecting tabs of the connecting busbar can be welded, for example, to other busbars.According to an advantageous exemplary embodiment, it is provided that a wall is formed on the insulating part, in particular on an edge of the insulating part, which wall protrudes from the bearing surface of the insulating part and protrudes beyond the connecting busbar in a direction perpendicular to the bearing surface. The wall increases the shortest connection between the connecting busbar and the second busbar connection, around the insulating part. The air gap and / or the creepage distance between the connecting busbar and the second busbar connection is thus increased. Due to the dimensions and in particular the height of the wall, the electrical connection arrangement can be easily adapted to creepage distance specifications.According to an advantageous exemplary embodiment, it is provided that a recess is formed in the connecting busbar, wherein a connecting element is formed on the insulating part, which connecting element protrudes from the supporting surface of the insulating part from the insulating part, wherein the connecting element protrudes through the recess in the connecting busbar. The connecting busbar is mechanically fastened to the insulating part by the connecting element.According to an advantageous exemplary embodiment, it is provided that a groove is formed in the connecting element, into which a holding region of the connecting busbar projects, such that the connecting busbar is fastened to the insulating part in a direction perpendicular to the bearing surface. The groove is formed in particular parallel to the bearing surface in the connecting element. The holding region of the connecting busbar projects into the groove of the connecting element in a direction parallel to the bearing surface. The groove forms an undercut by which the connecting busbar is held on the insulating part in a direction perpendicular to the bearing surface.According to an advantageous exemplary embodiment, it is provided that at least two first connecting tabs are formed on the connecting busbar, which first connecting tabs project 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 lugs extend in particular in the same plane. Tolerances can be compensated simultaneously by the slot and the recess can be provided.According to an advantageous exemplary embodiment, it is provided that at least one retaining element of the insulating part protrudes from the bearing surface, wherein an edge of the connecting busbar bears against the retaining element. The retaining 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 holding element. The connecting busbar is clipped into the groove of the connecting element between the connecting element and the holding element. The assembly of connecting current rail and insulating part can thus advantageously be manufactured in a simple manner.According to an advantageous exemplary embodiment, it is provided that at least two, in particular spaced apart, holding elements of the insulating part protrude from the support surface, wherein the edge of the connecting busbar bears against both holding elements. The two holding elements thus form, together with the connecting element, three locations at which the connecting busbar is held on the insulating part. Thus, the connecting busbar is fixed to the insulating part and is also protected against twisting about an axis perpendicular to the bearing surface.According to an advantageous exemplary embodiment, it is provided that the connecting current rail reaches over the insulating part in a bridge-like manner.According to an advantageous exemplary 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.Brief Description of the DrawingsAn exemplary embodiment of the invention is illustrated in the drawing and is explained in more detail in the following description. They show FIG. 1 shows an exemplary embodiment of the electrical connection arrangement, FIG. 2 shows a cross section through the exemplary embodiment of the electrical connection arrangement from FIG. 1, FIG. 3 shows the insulating part and the first busbar of the exemplary embodiment of the electrical connection arrangement from FIG. 1, FIG. 4 shows a cross section through the insulating part and the first busbar from FIG. 3.Embodiments of the InventionThe connection arrangement 1 can be used, for example, in systems which carry high currents, for example in power electronics, for example in electric vehicles or hybrid vehicles.The connection arrangement 1 comprises a first electrical and / or electronic component 10 and a second electrical and / or electronic component 20. In the exemplary embodiment shown 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 molded power switch.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 planar busbars 41, 49 connected to one another. 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 protruding from the first electrical and / or electronic component and being electrically connected thereto. The terminal busbar 49 is electrically connected to the connecting busbar 41, for example welded thereto. The connecting busbar 49 is connected in a planar manner 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.The connecting busbar 41 is formed as a bent metal sheet. At least one first connecting tab 42 and at least one second connecting tab 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 connection tabs 42 are separated from each other by slots 48 in the connection busbar 41. The first connecting tabs 42 extend in a planar manner, 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 tabs 43 are spaced apart from each other. The second connecting tabs 43 extend flat, in particular in the same plane. The first connection tabs 42 and the second connection tabs 43 protrude from the insulating part 30, in particular in mutually opposite directions. The first connecting tabs 42 extend toward the first electrical and / or electronic component 10. The first connecting tabs 42 are electrically connected, in particular welded, to the connection busbar 49. The second connecting tabs 43 extend toward 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.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 planar busbars 51, 52 connected to one another. In this exemplary embodiment, the second busbar connection 50 comprises a first busbar 51 and a 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.The connecting busbar 41, the connecting busbar 49, the first busbar 51 and the second busbar 52 are each busbars 41, 49, 51, 52. A busbar 41, 49, 51, 52 can thus be a busbar, for example. The busbars 41, 49, 51, 52 can be bent or curved, for example, or also extend in a curve- or step-like manner. The busbars 41, 49, 51, 52 are manufactured from an electrically conductive material, for example from 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 10. The first busbar connection 40 runs at least in sections plane-parallel to the second busbar connection 50. 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, there is a low-inductance connection between the first electrical and / or electronic component 10 and the second electrical and / or electronic component 20 as a result of electromagnetic interactions.As shown in FIG. 2, the second bus bar connection 50 is disposed directly below the first bus bar connection 40. The first bus bar 51 is disposed directly below the connection bus bar 41. The second bus bar 52 is disposed directly below the connection bus bar 41. The first bus bar 51 is disposed directly below the terminal bus bar 49 and directly below the connection bus bar 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 connection busbar 49, the first busbar 51 or the second busbar 52. If a first object is arranged directly below 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 in such a way that a vertical projection of the first object onto the plane of the support surface 31 and a vertical projection of the second object onto the plane of the support surface 31 have at least one intersection. The connection bus bar 41 is spaced apart from the second bus bar 52 by a minimum distance that is less than a width and / or a length of the connection bus bar 41.Furthermore, the electrical connection arrangement 1 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 member 30 is disposed in the clearance 60. The insulating part 30 isolates the first busbar connection 40 from the second busbar connection 50. The insulating part 30 is formed integrally, for example. The insulating part 30 is formed continuously from the same material, for example. The insulating part 30 is formed mirror-symmetrically, for example. For example, both the connecting busbar 41 and the insulating part 30 are designed mirror-symmetrically with respect to the same mirror plane.A support surface 31 is formed on the insulating part 30. The first connecting busbar 41 rests on the bearing surface. The support surface 31 is, for example, planar. The connecting busbar 41 extends in a region, in particular in the region in which the connecting busbar 41 rests on the bearing surface 31, substantially plane-parallel to the bearing 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 designed, for example, in the manner of a pin. The connecting element 33 has, for example, a cylindrical or a conical shape. A groove 34 is formed in the connecting element 33. The groove 34 extends in a plane parallel to the bearing 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 portion 46 of the connection bus bars 41 is inserted into the groove 34 of the connection member 33, and thereby the connection bus bar 41 is held on the insulating member 30 in a direction perpendicular to the support surface 31.At least one holding element 35 of the insulating part 30 protrudes from the bearing surface 31. In this exemplary embodiment, two retaining elements 35 of the insulating part 30 protrude from the bearing surface 31. The holding elements 35 each have a side wall, for example. The side walls of the holding elements 35 are, for example, planar. An edge 47 of the connecting busbars 41 abuts the side walls of the holding elements 35. The holding elements 35 hold the holding region 46 of the connecting busbar 41 in the groove 34 of the connecting element 33. 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 retaining elements 35. In the region of the edge 47, the connecting busbar 41 can also have an angled region, for example. The angled region allows the connecting busbar 41 to be easily clamped between the connecting element 33 and the holding elements 35, with the result that the holding region 46 of the connecting busbar 41 is pressed into the groove 34.On the insulating part 30, in particular on an edge of the insulating part 30, a wall 32 is formed. 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 bearing 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 creepage distance between the first busbar connection 40 and the second busbar connection 50.Of course, further exemplary embodiments and mixed forms of the exemplary embodiments shown are also possible.

Claims

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 apart 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 isolates the first busbar connection (40) from the second busbar connection (50) in the interspace (60), characterized in that the first busbar connection (40) comprises a connecting busbar (41) which rests on a bearing surface (31) of the insulating part (30) and is fastened to the insulating part (30).Electrical connection arrangement according to Claim 1, characterized in that at least one first connection tab (42) and at least one second connection tab (43) are formed on the connection busbar (41), wherein the first connection tab (42) and the second connection tab (43) project from the insulating part (30), in particular in mutually opposite directions.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 bearing surface (31) of the insulating part (30) and projects beyond the connecting busbar (41) in a direction perpendicular to the bearing surface (31).Electrical connection arrangement according to one of the preceding claims, characterized in that a recess (45) is formed in the connection busbar (41), wherein a connection element (33) is formed on the insulating part (30), said connection element protruding from the bearing surface (31) of the insulating part (30) from the insulating part (30), wherein the connection element (33) protrudes through the recess (45) in the connection busbar (41).Electrical connection arrangement according to Claim 4, characterized in that the connection element (33) has formed in it a groove (34) into which a holding region (46) of the connection busbar (41) projects, with the result that the connection busbar (41) is fastened to the insulating part (30) in a direction perpendicular to the bearing surface (31).Electrical connection arrangement according to one of the preceding claims, characterized in that at least two first connection lugs (42) are formed on the connection busbar (41), said first connection lugs protruding in particular in the same direction from the insulating part (30), wherein the two first connection lugs (42) are separated from one another by a slot (48), wherein the recess (45) is formed at one end of the slot (48).Electrical connection arrangement according to one of the preceding claims, characterized in that at least one retaining element (35) of the insulating part (30) projects from the bearing surface (31), wherein an edge (47) of the connection busbar (41) bears against the retaining element (35).Electrical connection arrangement according to Claim 7, characterized in that at least two retaining elements (35), in particular ones spaced apart from one another, of the insulating part (30) project from the bearing surface (31), the edge (47) of the connection busbar (41) bearing against both retaining elements (35).Electrical connection arrangement according to one of the preceding claims, characterized in that the connecting busbar (41) engages over the insulating part (30) in a bridge-like manner.Electrical connection arrangement according to one of the preceding claims, characterized in that the second busbar connection (50) comprises 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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