Busbar arrangement and switching arrangement

Abstract

comprising busbar arrangement (10): - an electrical busbar (14) having two end faces (22), a bottom face (24), a top face (26) and two side faces (28) connecting the bottom face (24) and the top face (26), and - a metallic busbar heat sink (12) with a bottom wall (16) and at least two cooling fins (18) extending from the bottom wall (16), wherein the cooling fins (18) together with the bottom wall (16) form a receiving space (20) for receiving the busbar (14) and wherein the busbar (14) is arranged in the receiving space (20) such that at least one of the two side surfaces (28) of the busbar (14) is in planar contact with one of the cooling fins (18).

Description

[0001] The present invention relates to a busbar arrangement and a switching arrangement with such a busbar arrangement.

[0002] In vehicles, and especially in electrified vehicles, electrical currents typically need to be distributed. This is usually done in a power distribution unit. In battery-powered vehicles, such a power distribution unit might be a battery junction box. These units typically contain busbars that define the electrical conductor path between the components to be connected. Unlike ordinary electrical conductors, these busbars are usually solid and their cross-section is adapted to the typically high currents they transmit.

[0003] Due to the constantly increasing demands regarding the electrical currents to be transmitted, two main challenges arise. Firstly, it is necessary to effectively dissipate heat from the busbar, as it can become very hot due to the electrical currents being transmitted. Secondly, installation space in modern vehicles is limited. This means that one or more busbars must be compactly arranged in a very confined space without causing electrical short circuits or overheating.

[0004] Document US 8,926,351 B2 discloses a busbar connection assembly comprising a first connector plate and a second connector plate spaced apart from the first connector plate such that the connector plates are configured to engage with a pair of phase conductors of a pair of busbar sections. The busbar connection assembly further comprises a first insulator assembly and a second insulator assembly. Each insulator assembly has a heat sink and two electrically insulating plates on each major side face of the heat sink. The insulator assemblies are arranged adjacent to the terminal plates such that the insulating plates electrically isolate the heat sinks from the terminal plates.The side plates are positioned next to the heat sinks and abut their end faces to assist in dissipating the heat generated by the busbar connection package to the environment via the heat sinks and the side plates.

[0005] Document US 3,639,676 A discloses a variety of wide, flat, insulated busbars that are pressed together in a flat, abutting relationship between inwardly bent aluminum side plates and formed sheet metal end caps. The side plates have formed reflex sections along opposing edges that extend outward at an angle and are clamped inward by rail sections on the end caps to press the sides essentially flat against the busbars and clamp the busbars tightly together. The elastically bent sides and reflex sections compensate for any accumulation of tolerances in the busbars and their insulation during assembly.Screws are used to fasten the sides and caps, and oversized recesses are provided for the screws so that the caps can be pressed firmly against the busbars, with the screws sitting loosely before they are finally fastened.

[0006] The object of the present invention is therefore to provide a busbar arrangement with which one or more busbars can be arranged compactly and simultaneously effectively dissipated from heat. Furthermore, it is an object of the present invention to provide a switching arrangement with such a busbar arrangement.

[0007] These problems are solved by claims 1 and 16. Further embodiments of the present invention are the subject of the dependent claims.

[0008] According to a first aspect of the present invention, a busbar assembly is provided. This assembly comprises: at least one electrical busbar, the busbar serving as a rigid electrical connection and having two end faces, a bottom face, a top face, and two side faces connecting the bottom face and the top face; a metallic busbar heat sink with a bottom wall and several, in particular at least two, cooling fins extending from the bottom wall, wherein each pair of adjacent cooling fins together with the bottom wall forms a substantially U-shaped or rectangular receiving space for receiving the busbar. According to the invention, the busbar is arranged in the receiving space such that at least one of the two side faces of the busbar is in planar contact with an associated cooling fin.In this disclosure, the term "area" contact means that one of the two side surfaces is in essentially full-surface contact with a side surface of the cooling fin, so that the cooling fin can dissipate heat from the electrical busbar across its entire side surface. The term "area" contact in this disclosure encompasses not only direct contact between the side surface of the busbar and the cooling fin, but also contact via any layers that may be present between the cooling fin and the side surface of the busbar, such as an insulating layer and / or a thermally conductive film. In particular, in the metallic busbar heat sink, the bottom wall is essentially horizontal, and the multiple, but at least two, cooling fins are essentially vertical, resulting in the essentially rectangular receiving space described above between two adjacent cooling fins.Furthermore, the floor and ceiling surfaces of the electrical busbar are significantly smaller compared to the side surfaces. In other words, the electrical busbars, as known to those skilled in the art for such rigid electrical connections, are essentially ribbon-shaped and have a thickness of 1 mm to 3 mm in order to safely transmit the currents to be carried out, depending on the application.

[0009] The busbar arrangement according to the invention is based, at least in part, on the understanding that the side surface of the electrical busbar offers a comparatively large contact area for heat dissipation when the side surface of the busbar is in full-surface contact with a heat sink. Heat dissipation via the side surface is naturally much more effective than heat dissipation via the ceiling or floor surface, which, as already mentioned, is significantly less effective with such busbars compared to the side surfaces.

[0010] Furthermore, the busbar arrangement according to the invention is based at least partially on the understanding that a compact busbar arrangement, particularly for multiple electrical busbars, can be achieved if the busbar heat sink has several cooling fins arranged adjacent to and parallel with each other. The busbar heat sink thus provides several adjacent receiving spaces for adjacently arranged busbars. This makes it possible for the respective electrical busbar to be effectively cooled by means of the associated cooling fin via its respective side surface. The adjacent arrangement of the multiple cooling fins also allows for the arrangement of several electrical busbars side by side.The busbar arrangement according to the invention therefore makes it possible not only to effectively dissipate heat from an electrical busbar, namely via its side surface, but also to accommodate several electrical busbars next to each other and thus in a particularly compact arrangement.

[0011] In a preferred embodiment of the busbar arrangement according to the invention, an electrical insulator is arranged between the cooling fin and at least one side surface of the busbar that is in contact with the cooling fin. In other words, there is contact between the side surface of the busbar and the insulator on the one hand, and contact between the insulator and the side surface of the cooling fin on the other. Since the busbar heat sink is metallic and therefore electrically conductive, an insulator is necessary if several busbars are to be arranged on the metallic busbar heat sink. This allows not only a single busbar, but several busbars to be cooled by means of a single busbar heat sink, with each busbar being arranged in its own designated compartment within the same busbar heat sink.

[0012] It is particularly advantageous if the insulator is made of an electrically insulating polymer material applied at least to the cooling fins and, if necessary, also to the base wall. This offers particular advantages in terms of manufacturing. For example, in a first step, the metallic busbar heat sink with the multiple cooling fins can be manufactured, and in a second step, the heat sink can be coated with the electrically insulating polymer material, so that the surfaces of the base wall and the sides of the cooling fins are covered with an insulator.

[0013] In another preferred embodiment, an air gap is provided between the base surface of the busbar and the base wall of the busbar heat sink. This air gap serves, in particular, to compensate for tolerances in the arrangement of the busbar(s) within the receiving space. As already mentioned, the busbar is a relatively rigid electrical conductor that cannot be bent without considerable force. The air gap facilitates full-surface contact between the cooling fin and one of the two side surfaces of the busbar, as manufacturing tolerances in the busbar and / or the heat sink can be compensated for by means of this gap.

[0014] Another preferred embodiment provides for a thermally conductive film to be arranged between the cooling fin and the at least one side surface of the busbar that is in contact with the cooling fin. Particularly preferred is the arrangement of the thermally conductive film, if an insulator is present, between the insulator and the side surface of the busbar. However, it is not strictly necessary to provide the insulator if only a single electrical busbar is present. In this case, the thermally conductive film can be arranged between the side surface of the busbar and the cooling fin. It is also possible for the thermally conductive film itself to be electrically insulating, thus eliminating the need for an electrical insulator if multiple busbars are to be arranged in the heat sink.

[0015] Another preferred embodiment provides that a fixing element is arranged in the receiving space of the busbar heat sink, which presses the busbar laterally towards its associated cooling fin and fixes the busbar in its position relative to the cooling fin. The fixing element serves as an additional tolerance compensation means.

[0016] It is particularly preferred, when an insulator is present between the busbar and the cooling fin, if the fixing element is integrated into or molded onto the insulator. This reduces the number of individual parts in the manufacture of the busbar assembly.

[0017] It is particularly preferred if the fixing element is designed as a spring element that applies a spring force and is installed under preload in the receiving space. Spring elements are characterized by their spring force. This force can be used to push the busbar towards the cooling fin. The spring element can be attached to the opposite cooling fin, for example, by means of a retaining lug or similar device. In particular, it is conceivable that, if an insulator is present, such a retaining lug is integrated into or molded onto the insulator.

[0018] Another preferred embodiment provides that the receiving chamber is filled with a potting compound. The potting compound improves heat dissipation.

[0019] Another preferred embodiment provides that the bottom wall of the busbar heat sink is connected to a housing wall of an enclosure. The enclosure can be made of metal or an insulating plastic and may be part of, for example, the power distribution unit described above.

[0020] It is particularly preferred if the bottom wall has alignment slots for aligning the busbar heat sink relative to the housing wall. The alignment slots enable advantageous and simple installation of the busbar assembly into a housing and / or mounting to a housing wall.

[0021] It is particularly advantageous if the housing wall is connected to a housing heat sink on one side facing away from the bottom wall. This allows heat to be dissipated from the busbar via the busbar heat sink and the housing wall to the external housing heat sink.

[0022] Another preferred embodiment provides that the busbar is curved, at least in sections, in its longitudinal direction (where the longitudinal direction is the direction of the electrical conductor path of the busbar), and that the cooling fins of the busbar heat sink are adapted to this at least partially curved path. Due to the adapted paths of the cooling fins of the busbar heat sink on the one hand and the busbar(s) on the other, a planar contact is achieved between the side surface of the busbar and its associated cooling fin, even in the longitudinal direction of the busbar. Furthermore, the current path can be adapted to any existing and predefined connection points.

[0023] Another preferred embodiment provides that the busbar heat sink has several cooling fins, two of which form a receiving space for a respective busbar, such that a busbar is arranged in each receiving space of the busbar heat sink in such a way that at least one of the two side surfaces of the respective busbar is in planar contact with a cooling fin assigned to that busbar. This preferred embodiment now enables the arrangement of several busbars in the busbar assembly as already described above.

[0024] It is particularly advantageous if the multiple busbars are arranged side by side and parallel to each other in the heat sink. This results in a particularly compact arrangement with a small footprint.

[0025] According to a second aspect of the present invention, a switching arrangement is provided. The switching arrangement comprises: a first electrical component, for example a battery power distribution component, with one or more first electrical connection points; a second electrical component, for example a connector, with one or more second electrical connection points; and a busbar arrangement according to the first aspect or embodiments thereof, wherein the electrical busbar is electrically connected to at least one of the first connection points at a first busbar section and to at least one of the second connection points at a second busbar section.With the switching arrangement according to the second aspect of the invention, one or more busbars can thus be effectively laid between the two electrical components in a small installation space, so that the electrical components can be electrically connected by means of the busbars.

[0026] Further features and functions of the present invention will become apparent to the person skilled in the art by carrying out the teaching presented here and by examining the accompanying drawings. These show: Fig. 1 a schematic sectional view of an embodiment of the busbar arrangement according to the invention with a single busbar, Fig. 2 a schematic sectional view of a further embodiment of the busbar arrangement according to the invention with several busbars arranged side by side and an insulator surrounding the metallic cooling fins, Fig. 3 a schematic sectional view of a further embodiment of the busbar arrangement according to the invention with fixing elements designed as spring elements and a screw connection to a housing, Fig. 4 a schematic sectional view of a further embodiment of the busbar arrangement according to the invention with a fixing element designed as a spring element and a hot-stitched connection to a housing, Fig. 5 a schematic sectional view of a further embodiment of the busbar arrangement according to the invention, in which the longitudinal direction of the busbar has a curved course at least in sections, and Fig. 6 a schematic view of an embodiment of the switching arrangement according to the invention, in which the busbar arrangement according to the invention electrically connects two electrical components.

[0027] Elements with the same function or construction are provided with the same reference symbols across all figures.

[0028] It should first be on Fig. 1 referenced, which shows a schematic sectional view of a busbar arrangement 10 with a metallic busbar heat sink 12 and an electrical busbar 14.

[0029] The busbar heat sink 12 has a bottom wall 16 and in the specific example of Fig. 1. Two cooling fins 18 connected to the bottom wall 16. In this specific example, the bottom wall 16 extends from Fig. 1 is essentially horizontal and the cooling fins 18 extend essentially vertically, so that the cooling fins 18 and the bottom wall 16 together form an essentially rectangular receiving space 20 for the busbar 14. In other words, a rectangular receiving channel for the busbar 14 is formed in the longitudinal direction of the busbar 14.

[0030] The electrical busbar 14, unlike normal electrical conductors, is a ribbon-shaped, rigid electrical connection, commonly used in battery-powered vehicles for distributing high electrical currents. The electrical busbar 14 has two end faces 22, one of which is shown in the sectional view of Fig. Figure 1 shows one. The electrical busbar 14 further comprises a base surface 24, a top surface 26, and two side surfaces 28 connecting the base surface 24 to the top surface 26. The two side surfaces 28 are significantly larger than the base surface 24 and the top surface 26, respectively, as is usually the case with such a busbar 14. A typical thickness, measured between the two opposing side surfaces 28, of the busbar 14 is, for example, in the range of 1 mm to 3 mm. A typical height, measured between the base surface 24 and the top surface 26, of the busbar 14 is, for example, in the range of 5 mm to 30 mm.

[0031] The metallic busbar heat sink 12 serves to dissipate heat from the busbar 14. To effectively dissipate heat from the busbar 14, the busbar arrangement 10 according to the invention proposes that one of the two side surfaces 28 of the busbar 14 be in planar and thermally conductive contact with one of the two cooling fins 18. In the specific example of Fig. 1 The right side surface 28 of the busbar 14 contacts a left side surface of the right cooling fins 18. Since the busbar heat sink 12 is metallic and there is a planar contact between cooling fins 18 and busbar 14, it is possible to effectively dissipate heat from the busbar 14, namely over the entire width of the side surface 28.

[0032] To improve the contact between the busbar 14 and the cooling fin 18 and to ensure a long service life for the arrangement 10, a fixing element 30 is additionally located in the receiving space 20 of the busbar arrangement 10. The fixing element 30 presses the busbar 14 towards the right cooling fin 18 and fixes the busbar 14 in its position within the receiving space 20 and relative to the cooling fin 18. The fixing element 30 can be of any shape. In the specific example of Fig. 1. The fixing element 30 is a separate fixing element located in the receiving space 20, which is attached on one side to the left cooling fin 18 and on the other side presses against the power rail 14. Various designs in terms of shape and materials are conceivable.

[0033] As further in Fig. As shown in Figure 1, there is an air gap, designated by reference numeral 32, between the base surface 24 of the busbar 14 and the bottom wall 16 of the busbar heat sink 12. The air gap 32 offers advantages during the installation of the busbar 14 and can be used to compensate for tolerances when mounting the busbar 14 in the busbar heat sink 12.

[0034] It was now on Fig. 2 referred.

[0035] In contrast to the busbar arrangement of Fig. 1 the busbar heat sink 12 of the busbar assembly 10 of Fig. 2 more than two cooling fins 18 on. In the specific example of Fig. Figure 2 shows four cooling fins 18. The cooling fins 18 are arranged side by side, run essentially vertically, and are located on the common bottom wall 16 of the busbar heat sink 12. Two adjacent cooling fins 18 form a receiving space 20 for receiving a respective busbar 14. In the busbar arrangement 10 of Fig. Figure 2 shows three busbars 14 arranged parallel and adjacent to each other, with each busbar 14 located in a separate receiving space 20. However, it is not mandatory that each receiving space 20 has a busbar 14.

[0036] Since the busbar heat sink 12 is a metallic heat sink, it is essential that no electrical short circuit occurs between the busbars 14. Therefore, the cooling fins 18 in particular are coated with an electrical insulator 34. In the specific example of Fig. 2 is the electrical insulator 34 on the cooling fins 18 and in the specific example of Fig. 2. Polymer material also applied to the base wall 16, which acts as an electrical insulator. The electrical insulator 34 prevents an electrical short circuit to an adjacent busbar 14 from occurring through contact between the busbar 14 and the cooling fin 18.

[0037] As further in Fig. As shown in Figure 2, the fixing element 30 is integrated into the electrical insulator 34 or is shaped in such a way that the fixing element 30 or the corresponding section of the insulator 34 pushes the respective busbar 14 in the direction towards the cooling fin 18 associated with it.

[0038] In the specific example of Fig. 2. Furthermore, a thermally conductive film 36 is provided between each busbar 14 and its associated cooling fin 18. The thermally conductive film 36 improves the thermally conductive contact between the busbar 14 and the cooling fin 18. In another embodiment, not shown, the thermally conductive film 36 is also integrated into the insulator 34. However, it is also possible that only the thermally conductive film 36 is present instead of the insulator 34, in which case it must be designed as an electrical insulator if several busbars 14 are arranged in the busbar heat sink 12, in order to prevent the aforementioned short circuit between the busbars 14.

[0039] As further in Fig. As shown in Figure 2, the bottom wall 16 of the busbar heat sink 12 is connected to a housing wall 38 of a housing 40, which is in Fig. Figure 2 shows a partial view. The housing 40 can be a housing of a power distribution unit in which the busbar assembly 10 is arranged.

[0040] In the specific example of Fig. 2 the bottom wall 16 is also connected to the housing wall 38 by means of a hot-stitched pin 42.

[0041] It was now on Fig. 3 referred.

[0042] In contrast to the busbar arrangement 10 of Fig. 2 is in the busbar arrangement 10 of Fig. 3 the fixing element is designed as a spring element 35, which is arranged under preload in the respective receiving space 20, wherein the spring element 35 in turn presses the busbar 14 in the direction towards the cooling fins 18. The fixing element designed as a spring element 35 is in the specific example of Fig. 3 is attached in the receiving space 20 by means of a retaining lug 44 integrated into the insulator 34.

[0043] In contrast to the busbar arrangement 10 of Fig. 2 is in the busbar arrangement 10 of Fig. 3 furthermore, the bottom wall 16 is fastened to the housing wall 38 by means of a screw 46.

[0044] It was now on Fig. 4 referred.

[0045] In the specific example of Fig. 4 The busbar heat sink 12 of the busbar assembly 10 is attached to the housing wall 38 by means of the hot-stitched pin 42. In contrast to the embodiments described so far, in the embodiment of Fig. 4. The housing wall 38 of the housing 40 is also connected to an external housing heat sink 48. In other words, the housing wall 38 is connected to the housing heat sink 48 on a side facing away from the bottom wall 16. The housing heat sink 48 establishes a thermally conductive connection to the busbars 14 via the cooling fins 18, the bottom wall 16, and the housing wall 38. This enables even more effective heat dissipation from the busbars 14 to an environment outside the housing 40.

[0046] In the embodiment of Fig. In addition, the receiving chambers 20 are filled with potting compound 50. The potting compound 50 improves the heat dissipation of the busbars 14.

[0047] It was now on Fig. Reference is made to Figure 5, which shows a sectional view through the busbar arrangement 10, wherein the busbars 14 in the embodiment of Fig. 5, in particular in the longitudinal direction of the conductor rails 14, run curved at least in sections. The at least partially curved, in the Fig. The partially curved course of the busbars 14 results in the busbars 14 not being aligned in the longitudinal direction, i.e., in the direction of the electrical conductor path. For example, a first section of the busbars 14 extends along a first axis 52, and a second section of the busbars 14 extends along a second axis 54, which is not aligned with the first axis 52 or is spaced apart from it. Between the two linear sections of the busbars 14 is a curved section 56, which is at least partially arc-shaped. This curved course of the busbars 14 makes it possible to adapt the current routing, for example, to predefined connection points. A parallel arrangement of the two axes 52 and 54 is not strictly necessary.

[0048] As also in Fig. As can be clearly seen in Figure 5, the cooling fins 18 are aligned in the longitudinal direction with the at least partially curved path of the busbars 14, so that the side surfaces 28 are in contact with the cooling fins 18. It is also clearly visible that the multiple busbars 14 run parallel to each other, resulting in a horizontally stacked arrangement of parallel busbars 14.

[0049] As also in Fig. As shown in Figure 5, the bottom wall 16 of the busbar heat sink 12 has alignment slots 58, which serve to align the busbar heat sink 12 relative to a housing wall of an enclosure. This alignment capability can be used, for example, in Fig. 3. Identify the gap in the bore for screw 46 or in Fig. 4 at the gap in the bore for the hot-stitched pin 42. For example, the busbar heat sink 12 can first be mounted on a housing wall, and then a pin or screw can be inserted through the alignment slots 58. The busbars 14 and fixing elements are then inserted. Due to the relatively rigid busbars 14 and the fixing elements, the busbar heat sink 12 can move relative to the housing wall, with the alignment slots 58 acting as floating bearings. Once the busbars 14, together with the fixing elements, are inserted into the busbar heat sink 12, the busbar heat sink 12, aligned with the housing wall, can be fastened to the housing wall, for example, by hot-stitching the pin or tightening the screw.

[0050] Finally, there is still more to say Fig. Reference is made to Figure 6, which shows a switching arrangement 100, wherein the switching arrangement 10 includes, among other things, the busbar arrangement 10 already described, as well as a first electrical component 102 and a second electrical component 104. The first electrical component 102 can, for example, be a battery power distribution component, and the second electrical component 104 can, for example, be a connector, wherein the busbar arrangement 10 establishes an electrical connection between the two components 102, 104. In the specific example of Fig. 6 two first electrical connection points 106. The second electrical component 104 has, in the specific example of Fig. 6 also has two second electrical connection points 108. The busbars 14 are electrically connected to the first connection points 106 via a first section and to the second connection points 108 via a second section. In the specific example of Fig. In Figure 6, the first electrical component 102 is electrically connected to only one busbar 14, whereas the second electrical component 104 is electrically connected to two busbars 14. Of course, in other embodiments not shown, other suitable arrangements are conceivable in which one or more busbars 14 are electrically connected to one or more electrical connection points 106, 108.

[0051] Of course, it is conceivable that the various variants and designs associated with Fig.The items described in sections 1 to 6 can be combined with each other in any suitable manner.

Claims

[1] comprising busbar arrangement (10): - an electrical busbar (14) having two end faces (22), a bottom face (24), a top face (26) and two side faces (28) connecting the bottom face (24) and the top face (26), and - a metallic busbar heat sink (12) with a bottom wall (16) and at least two cooling fins (18) extending from the bottom wall (16), wherein the cooling fins (18) together with the bottom wall (16) form a receiving space (20) for receiving the busbar (14) and wherein the busbar (14) is arranged in the receiving space (20) such that at least one of the two side surfaces (28) of the busbar (14) is in planar contact with one of the cooling fins (18). [2] Busbar arrangement (10) according to claim 1, wherein an electrical insulator (34) is arranged between the cooling fin (18) and the at least one side surface (28) of the busbar (14) which is in contact with the cooling fin (18). [3] Busbar arrangement (10) according to claim 2, wherein the insulator (34) is formed from an electrically insulating polymer material applied at least to the cooling fins (18). [4] Busbar arrangement (10) according to one of the preceding claims, wherein an air gap (32) is provided between the bottom surface (24) of the busbar (14) and the bottom wall (16) of the busbar heat sink (12). [5] Busbar arrangement (10) according to one of the preceding claims, further comprising: - a thermally conductive film (36) arranged between the cooling fin (18) and the at least one side surface (28) of the busbar (14) which is in contact with the cooling fin (18). [6] Busbar arrangement (10) according to one of the preceding claims, further comprising: - a fixing element (30) arranged in the receiving space (20), which pushes the power rail (14) laterally towards the cooling fin (18) and fixes it in its position. [7] Busbar arrangement (10) according to claim 6 in combination with one of claims 2-3, wherein the fixing element (30) is integrated into the insulator (34). [8] Busbar arrangement (10) according to claim 7, wherein the fixing element (30) is designed as a spring element (35) which applies a spring force and is installed under preload in the receiving space (20). [9] Busbar arrangement (10) according to one of the preceding claims, wherein the receiving space (20) is filled with a potting compound (50). [10] Busbar arrangement (10) according to one of the preceding claims, wherein the bottom wall (16) of the busbar heat sink (12) is connected to a housing wall (38) of a housing (40). [11] Busbar arrangement (10) according to claim 10, wherein the bottom wall (16) has alignment slots (58) for aligning the busbar heat sink (12) relative to the housing wall (38). [12] Busbar arrangement (10) according to one of claims 10-11, wherein the housing wall (38) is connected to a housing heat sink (48) on a side facing away from the bottom wall (16). [13] Busbar arrangement (10) according to one of the preceding claims, wherein the busbar (14) is curved at least in sections in the longitudinal direction and the cooling fins (18) of the busbar heat sink (12) are adapted to this curved course at least in sections. [14] Busbar arrangement (10) according to one of the preceding claims, wherein the busbar heat sink (12) has several cooling fins (18), two of which form a respective receiving space (20) for a respective busbar (14), and wherein in a respective receiving space (20) of the busbar heat sink (12) a busbar (14) is arranged such that at least one of the two side surfaces (28) of the respective busbar (14) is in planar contact with one of the cooling fins (18). [15] Busbar arrangement (10) according to claim 14, wherein the multiple busbars (14) are arranged side by side and parallel to each other in the busbar heat sink (12). [16] Switching arrangement (100) with: - a first electrical component (102) with a first electrical connection point (106), - a second electrical component (104 with a second electrical connection point (108), and - a busbar arrangement (10) according to one of the preceding claims, wherein the electrical busbar (14) is electrically connected to the first connection point (106) at a first section and to the second connection point (108) at a second section.

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