Assembly consisting of at least one busbar on a body component of a motor vehicle
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-10
- Publication Date
- 2026-08-13
Smart Images
Figure 00000022_0000 
Figure 00000022_0001 
Figure 00000022_0002
Abstract
Description
[0001] Lisa Dräxlmaier GmbH
[0002] 10.02.2026 0692024-WO-PCT
[0003] 1
[0004] Lisa Dräxlmaier GmbH
[0005] Landshuter Str. 100
[0006] D-84137 Vilsbiburg
[0007] ARRANGEMENT OF AT LEAST ONE POWER LINE ON A BODY COMPONENT OF A MOTOR VEHICLE
[0008] Technical field
[0009] The invention relates to an arrangement of at least one busbar on a body component of a motor vehicle.
[0010] State of the art
[0011] A busbar is a type of electrical busbar designed to transfer electrical energy between components within a vehicle. Busbars are often used to safely conduct electrical current between the high-voltage battery, control unit, drive system, and charging unit. A busbar is a metal sheet or a rail made of copper or aluminum used in the vehicle's electrical power distribution system. In particular, the busbar serves as a high-current conductor. The busbar ensures the safe, short-circuit-free transmission of electrical energy.
[0012] During the charging process of a vehicle with very high currents, very large amounts of heat can be generated, primarily due to conductor and contact resistances. This heat can be conducted by the conductor and also absorbed by the conductor due to its heat capacity.
[0013] Description of the invention
[0014] The object of the present invention is to provide a solution by which heat can be dissipated particularly effectively from a busbar of a motor vehicle. Lisa Dräxlmaier GmbH
[0015] 10.02.2026 0692024-WO-PCT
[0016] 2
[0017] This problem is solved according to the invention by the subject matter of the independent claim. Further possible embodiments of the invention are disclosed in the dependent claims, the description, and the figures.
[0018] The invention relates to an arrangement of at least one busbar on a body component of a motor vehicle, in particular a passenger car. The busbar is a so-called busbar. The busbar can comprise a core made of aluminum or copper, which is sheathed, in particular overmolded, with an insulating material. The busbar is designed as a flat conductor.
[0019] It is therefore provided that the busbar has an elongated cross-section. In particular, the cross-section of the busbar has at least substantially the shape of a rectangle. In the arrangement, it is preferably provided that the at least one busbar is arranged on a base and a wall of the body component, wherein the busbar is arranged lying on the base and on the wall, whereby a first broad side of the busbar faces the base and a first narrow side of the busbar faces the wall of the body component. A thermally conductive material is arranged between the busbar and the base and / or the wall of the body component. In particular, the thermally conductive material has a thermal conductivity of at least 1.3 watts per meter Kelvin, preferably at least 1.5 watts per meter Kelvin or at least 2 watts per meter Kelvin.The thermal interface material preferably has a particularly high thermal conductivity, in particular a thermal conductivity of more than five watts per meter Kelvin, and especially a thermal conductivity of more than 20 watts per meter Kelvin. The thermal interface material can be provided, for example, as a thermal paste, a thermal pad, in fleece form (e.g., as copper fleece), or as a gap filler.
[0020] Regardless of the other feature combinations presented as advantageous, increased heat dissipation can already be achieved through the laterally bounding wall or the floor, even without thermally conductive material. In this case, the floor is usually horizontally oriented, as its name suggests, while the wall is vertically oriented. Other orientations are conceivable, however, as long as the floor and wall are linearly independent of each other. (Lisa Dräxlmaier GmbH)
[0021] 10.02.2026 0692024-WO-PCT
[0022] 3
[0023] Increased heat dissipation may be possible through convection or thermal radiation even without thermal conductivity in such an arrangement, provided that a holder ensures a correspondingly secure positioning.
[0024] This arrangement thus enables particularly efficient cooling of the power rail, which allows particularly high currents to be transmitted within the vehicle via the power rail.
[0025] In a possible further development of the invention, the arrangement comprises at least one holding device which holds the at least one busbar and is attached to the body panel. In other words, the busbar is attached to the holding device, and the holding device is in turn attached to the body panel, thereby indirectly holding the busbar to the body panel via the holding device. This allows the busbar to be positioned lying on the floor and against the wall by means of the holding device. The holding device enables a particularly secure hold of the busbar to the body panel.
[0026] The invention further relates to an arrangement of at least one busbar on a body component of a motor vehicle, wherein the at least one busbar is arranged on a base and a wall of the body component, the busbar being designed as a flat conductor and arranged lying on the base and on the wall, whereby a first broad side of the busbar faces the base and a first narrow side of the busbar faces the wall of the body component. At least one retaining device is provided which holds the at least one busbar and is attached to the body component. The retaining device preferably completely encloses the at least one busbar in a longitudinally extending region around its entire circumference.
[0027] The longitudinal direction of the busbar runs perpendicular to its cross-section. It is designed that, in a section of the busbar running in this longitudinal direction, the busbar is completely enclosed by the retaining device. This ensures that the busbar is held particularly securely to the retaining device. Furthermore, the geometric design of the retaining device allows for precise control over the relative position of the busbar within the recess, relative to the recess itself. This is therefore Lisa Dräxlmaier GmbH
[0028] 10.02.2026 0692024-WO-PCT
[0029] 4
[0030] The holding device enables particularly secure holding and particularly precise positioning of the busbar within the recess.
[0031] In another possible embodiment of the invention, the holding device provides for two busbars to be arranged horizontally, one above the other. The horizontal arrangement of the busbars means, in particular, that the busbars are arranged such that each faces one of its broad sides towards the other busbar. This arrangement is therefore particularly compact. Furthermore, it allows for excellent heat exchange between the busbars, enabling rapid temperature equalization. Consequently, large temperature differences between the busbars can be effectively avoided.
[0032] In this context, it may be particularly useful to arrange thermally conductive material between the two busbars. This material may be the same as that used between at least one busbar and the wall and / or floor of the body panel, or it may be a different thermally conductive material. The thermally conductive material allows heat to be conducted between the busbars with exceptional efficiency, thus effectively compensating for temperature differences between them. Furthermore, heat can be transferred from the upper of the two superimposed busbars to the lower busbar via the thermally conductive material, and from the lower busbar, via the same or different thermally conductive material, to the body panel via the floor and / or wall. This allows both busbars to be cooled with exceptional efficiency.
[0033] In another possible embodiment of the invention, the holding device projects laterally between the two busbars, allowing thermal conductivity to be positioned between them. In particular, the thermal conductivity can be positioned between the busbars by means of the holding device. Furthermore, the lateral projection of the holding device between the two busbars allows for the adjustment of the depth-related distance between the busbars. The holding device thus enables particularly precise alignment and positioning of the busbars relative to each other.
[0034] 10.02.2026 0692024-WO-PCT
[0035] 5
[0036] Power rails to the wall and / or floor of the body component enable precise alignment of the thermal conductivity relative to the power rails in order to achieve efficient heat transfer between the power rails.
[0037] In another possible embodiment of the invention, the body component is a die-cast component. In particular, the body component can comprise aluminum, for example in the form of an aluminum alloy. The body component is thus manufactured using a die-casting process. Die casting enables the body component to be manufactured with a particularly precise geometry. Furthermore, the body component manufactured using the die-casting process can have a greater wall thickness than, for example, a body component manufactured from sheet metal by forming. As a result of the greater wall thickness of the body component, heat can be dissipated from the wall and / or the floor particularly quickly. Consequently, the at least one busbar arranged on the floor and the wall can be cooled particularly efficiently.
[0038] In another possible embodiment of the invention, the busbar is recessed in a depression of the body panel. This depression is an outwardly open recess in the body panel. The depression is a type of outwardly open channel in which the at least one busbar is recessed. The depression thus forms a type of open cable channel for the at least one busbar arranged in it. The cross-section of the depression is adapted to the at least one busbar to be recessed in it.
[0039] The cross-section of the depression preferably lies in a plane defined by a depth direction and a width direction of the depression. The depth direction extends from the bottom of the depression towards the inlet of the depression. In particular, the depth direction can be perpendicular to the bottom of the depression. The width direction of the depression preferably extends from one of the walls of the body component bounding the depression on opposite sides to the other of these walls along the shortest path. The length direction of the depression preferably extends perpendicular to both the depth direction and the width direction of the depression. The length direction, width direction, and depth direction of the depression run parallel to the corresponding length direction. Lisa Dräxlmaier GmbH
[0040] 10.02.2026 0692024-WO-PCT
[0041] 6
[0042] Width direction and depth direction of at least one busbar, in particular parallel.
[0043] The cross-section of the conductor rail is thus preferably bounded by two opposing, longer broad sides and two opposing, comparatively shorter narrow sides. The respective broad sides can, in particular, each have a greater extent than the respective narrow sides of the conductor rail.
[0044] In this arrangement, at least one conductor rail is preferably positioned horizontally within the recess. This ensures that, in particular, a first broad side of the conductor rail faces the bottom of the recess. The second broad side, opposite the first broad side, is then oriented towards an entrance of the recess. The respective narrow sides of the conductor rail are then positioned facing the respective walls of the body panel that laterally define the recess.
[0045] To ensure particularly efficient heat transfer from the busbar to the body panel, a thermally conductive material can be arranged between the busbar and at least one wall of the body panel that defines the recess. This thermally conductive material can be positioned between the first broad side and the bottom of the recess, and / or between one of the narrow sides and the wall of the body panel facing that narrow side, which laterally defines the recess. The thermally conductive material is in contact with both the busbar and the wall of the body panel that defines the recess, thus enabling particularly efficient heat transfer from the busbar to the body panel. Specifically, it is provided that a thermally conductive material is arranged between the busbar and all walls of the body panel that define the recess.
[0046] Because the busbar is positioned in the recess of the body panel and not merely resting on a flat surface, a particularly large area of the busbar's outer surface can be thermally connected to the body panel via the thermally conductive compound. This allows for particularly high heat transfer from the busbar to the body panel, resulting in highly efficient cooling. Furthermore, the risk of damage to the recessed busbar is eliminated. Lisa Dräxlmaier GmbH
[0047] 10.02.2026 0692024-WO-PCT
[0048] 7
[0049] particularly low, since the busbar is enclosed over a particularly large area of its circumference by the walls of the body component that define the depression and is thus protected from mechanical impact.
[0050] In a further possible embodiment of the invention, the retaining device is used to position the busbar within the recess. This allows the retaining device to position the busbar at least substantially centrally within the recess with respect to its cross-section. In particular, the retaining device allows the busbar to be positioned within the recess in such a way that it makes contact with the thermal interface material over a particularly large area. If the thermal interface material, in turn, makes contact with the body panel over a particularly large area of the recess-bounding walls, then particularly good heat transfer and, consequently, particularly efficient cooling of the busbar can be achieved.
[0051] In another possible embodiment of the invention, two busbars can be arranged one above the other in the depression, which do not protrude beyond the entrance of the depression.
[0052] The horizontal arrangement of the busbars means, in particular, that the busbars are arranged one above the other in such a way that each busbar faces one of its broad sides. All broad sides of the busbars thus preferably overlap each other along a line extending from the bottom of the recess to the opening of the recess, which is particularly perpendicular to the bottom of the recess. Specifically, the busbars have the same cross-section and completely overlap each other in the depth direction of the recess extending from the bottom towards the opening. This ensures, firstly, that both busbars are protected from damage by the respective walls of the body component that define the recess, and secondly, that both busbars can be cooled particularly efficiently through excellent heat transfer to the body component.In particular, thermally conductive material is arranged between the two busbars.
[0053] In another possible embodiment of the invention, it is provided that the body component has two parallel depressions, with each of the Lisa Dräxlmaier GmbH
[0054] 10.02.2026 0692024-WO-PCT
[0055] 8
[0056] At least one conductor rail is recessed in the sinks. The sinks thus run parallel to each other, at least in sections, along their length.
[0057] The busbar arranged in the first of the sinks and the busbar arranged in the second sink can be configured to be connected to different terminals, such as a positive terminal and a negative terminal, of an electronic motor vehicle component of the motor vehicle.
[0058] For example, the busbar located in the first sink can be configured to be connected to a positive terminal of the motor vehicle component, and the busbar located in the second sink can be configured to be connected to a negative terminal of the motor vehicle component.
[0059] Because the two parallel recesses are provided, a particularly small number of conductor rails can be arranged in each of the recesses for a given number of conductor rails of the motor vehicle, which allows the conductor rail arranged in the respective recess to dissipate heat to the body component particularly efficiently by means of the thermal conductivity material and thus be cooled particularly efficiently.
[0060] In a further possible embodiment of the invention, the entrance to the recess is covered by a cover, whereby the at least one busbar is completely enclosed around its circumference by the respective walls of the body component and the cover that define the recess. This means that the at least one busbar in the recess is completely enclosed by the walls defining the recess in combination with the cover. The cover prevents the ingress of dust, dirt, and / or moisture into the recess. The busbar is thus particularly well protected from contamination. Furthermore, the cover provides particularly good protection against mechanical damage to the at least one busbar arranged in the recess.
[0061] In another possible embodiment of the invention, a cover is arranged between two retaining devices holding the busbar. In other words, the cover is arranged along the length of the busbar in a section located between the two retaining devices. The busbar can thus be particularly well protected in this section by means of the cover. Lisa Dräxlmaier GmbH
[0062] 10.02.2026 0692024-WO-PCT
[0063] 9
[0064] It must be protected. It is possible that the cover can be positioned relative to the busbar using the holding devices.
[0065] In this context, it may be particularly useful to arrange a functional layer between the busbar and the cover, designed to contact both the busbar and the cover. Depending on the material and design chosen, the functional layer can fulfill various functions, such as providing rattle protection, enabling particularly efficient heat transfer from the busbar (at least one) to the cover for cooling the busbar, and / or protecting the busbar in contact with the functional layer from mechanical impacts of the cover and resulting mechanical damage. In particular, the functional layer may also have an insulating effect, which can be especially advantageous if the cover itself is a poor conductor of heat and is connected to other components, such as the body panel, with low thermal conductivity.If the functional layer acts as a rattle preventer, it prevents repeated contact between the cover and the busbar from generating rattling noise in the vehicle, for example, due to vibration or oscillation of the cover during operation. The functional layers may be manufactured separately from the cover. It is possible that the functional layer is attached to the cover. The cover and the functional layer may be made of the same or different materials.
[0066] Further advantages, features, and details of the invention may become apparent from the following description of possible embodiments and from the drawings. The features and combinations of features mentioned above in the description, as well as those shown below in the figure description and / or in the figures themselves, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention.
[0067] Brief character description
[0068] The drawing is shown in: Lisa Dräxlmaier GmbH
[0069] 10.02.2026 0692024-WO-PCT
[0070] 10
[0071] Fig. 1 shows a schematic perspective view of an arrangement of a busbar in a recess of a body component;
[0072] Fig. 2 shows a schematic perspective view of two busbars positioned relative to each other by means of a holding device;
[0073] Fig. 3 shows a schematic cutaway perspective view of two conductor rails held by means of the holding device and arranged in the recess of the body component;
[0074] Fig. 4 shows a schematic exploded view of the holding device;
[0075] Fig. 5 shows a schematic cutaway perspective view of the arrangement with the two busbars positioned in the depression;
[0076] Fig. 6 shows a schematic perspective view of an arrangement in which the body component has two parallel recesses, each containing a power rail.
[0077] Fig. 7 shows a schematic perspective view of the arrangement according to Fig. 6, wherein the respective openings of the sinks are at least partially closed by means of a cover; and
[0078] Fig. 8 shows a cutaway perspective view of the arrangement according to Fig. 7.
[0079] Identical elements in the figures have the same reference symbols.
[0080] Figure 1 shows a schematic perspective view of an arrangement 10 for a motor vehicle. In the arrangement 10, a busbar 12 is recessed in a recess 14 of a body component 16. The body component 16 is a die-cast aluminum part. In the embodiment shown in Figure 1, the busbar 12 is completely recessed in the recess 14 of the body component 16, at least along one longitudinal section, and thus does not protrude beyond an opening 18 of the recess 14. Furthermore, several retaining devices 20 can be seen in Figure 1. (Lisa Dräxlmaier GmbH)
[0081] 10.02.2026 0692024-WO-PCT
[0082] 11
[0083] which are designed to hold the power rail 12 and position it within the recess 14. For this purpose, the holding devices 20 are designed to be attached to the body component 16.
[0084] The depression 14 has a longitudinal direction L, a transverse direction B perpendicular to it, and a depth direction T perpendicular to both the longitudinal direction L and the transverse direction B. The depth direction T runs along the shortest path from a floor 22 of the depression 14 towards the entrance 18 of the depression 14. The transverse direction B runs along the shortest path from a first wall 24 of the body component 16, which bounds the depression 14 on one side, to a second wall 26 of the body component 16, which bounds the depression 14 on a second side opposite the first.
[0085] In the embodiment shown in Fig. 1, two busbars 12 are arranged one above the other in the recess 14. The arrangement of these two busbars 12 relative to each other within the recess 14 is particularly evident in the sectional perspective view in Fig. 3. Each of the busbars 12 has a cross-section that is at least substantially rectangular. With their elongated cross-sections, the busbars 12 are arranged horizontally, one above the other, in the recess 14.
[0086] In the cross-section shown in Fig. 3, the busbars 12 are shown in section in a plane perpendicular to the longitudinal direction L. Each busbar 12 is bounded on opposite sides in the depth direction T by respective broad sides 28. Furthermore, each busbar 12 has two opposite narrow sides 30 that bound the busbar 12 in the width direction B. The horizontal arrangement of the busbars 12 within the depression 14 means that the first broad sides 28 of each busbar 12 face the bottom 22 of the depression 14, and the other broad sides 28 face the inlet 18 of the depression 14. Each busbar 12 is oriented with one broad side 28 facing the other busbar 12.The respective narrow sides 30 of each of the busbars 12 are aligned towards the respective walls 24, 26 of the body component 16 that laterally delimit the depression 14. The busbars 12 are stacked one above the other in the depth direction T, whereby the broad sides 28 of the busbars 12 are aligned along the Lisa Dräxlmaier GmbH.
[0087] 10.02.2026 0692024-WO-PCT
[0088] 12
[0089] Depth direction T mutually overlap, in particular completely overlap each other with a cross-section of the busbars 12.
[0090] To enable particularly efficient cooling of the busbars 12, a thermally conductive material 36 is arranged between a first busbar 12, which is hereinafter referred to as reference numeral 32 and is located in the depth direction T between the bottom 22 of the recess 14 and the second busbar 34, and at least one wall of the body component 16 that bounds the recess 14 – and thus the bottom 22 and / or the first wall 24 and / or the second wall 26. To further ensure particularly good cooling of the second busbar 34, a thermally conductive material 36 is also arranged in the depth direction T between the first busbar 32 and the second busbar 34. The larger the area of contact between the respective thermally conductive material 36 and the respective busbars 12, the better the heat transfer from the respective busbars 12 to the thermally conductive material 36.By means of the respective thermally conductive material 36, heat can be dissipated from the respective busbar 12, thereby cooling the busbar 12. The thermally conductive materials 36 can, for example, be configured as gap pads. By means of the thermally conductive material 36, which is arranged in the depth direction T between the two busbars 12, temperature differences between the busbars 12 can be equalized. By means of the thermally conductive material 36, which is in contact with both the first busbar 32 and the body component 16, a thermal connection between the busbars 12 and the body component 16 is established. The respective thermally conductive materials 36 can be in contact with the respective busbars 12 only in sections or continuously with respect to the length direction L.In addition to conducting heat away from the respective busbars 12, the thermally conductive materials 36 can also serve as a retaining element for the busbars 12 by adhesively bonding them to the body component 16. Alternatively or additionally, the thermally conductive materials 36 can be used to locally influence the natural frequency of the busbars 12 and / or generally to serve as vibration and rattle protection. By applying thermally conductive materials 36 to defined areas of the respective busbars 12, a specific natural frequency of each busbar 12 can be set to prevent continuous excitation of the busbar 12 during operation and thus during use in motor vehicles. Lisa Dräxlmaier GmbH.
[0091] 10.02.2026 0692024-WO-PCT
[0092] 13
[0093] Figure 4 shows an exploded view of the holding device 20 in one possible embodiment. The holding device 20 comprises two gripping elements 38, which are designed to be applied to or folded against the conductor rails 12 from opposite sides in the width direction B. This means that the gripping elements 38 together completely enclose both conductor rails 12 over their entire circumference in a length L0 extending in the length direction L, as can also be seen in the schematic perspective view of the conductor rails 12 and the two holding devices 20 shown in Figure 2.
[0094] As can be further seen in Fig. 4, each of the gripping elements 38 has a projection 40 extending in the width direction B. These projections 40 can be arranged in the depth direction T between the busbars 12 by inserting them laterally between the busbars 12 along the width direction B. This allows the gripping elements 38 to completely encircle each busbar 12 individually. The gripping elements 38 can be configured to completely cover or fill a cross-section of the recess 14 along a length L0 of the recess 14, as shown in Fig.As can be seen in Fig. 2, several holding devices 20 are provided, which are arranged at a distance from each other in the longitudinal direction L. Then, by engaging the projections 40 between the busbars 12, the thermal conductivity 36, arranged in the depth direction T between the busbars 12, can be positioned along the longitudinal direction L. As can be seen particularly well in Fig. 2, both busbars 12 are completely encompassed by the gripping elements 38.
[0095] As can be further seen in Fig. 4, the holding device 20 includes a hold-down device 42, which is designed to be connected to both gripping elements 38. The hold-down device 42 can be connected to the gripping elements 38 via respective joining points by means of a force-fit, positive-fit, and / or material-fit connection. By means of the hold-down device 42, the gripping elements 38 can be fixed relative to each other in the lateral direction B by means of the hold-down device 42 forming a plug connection with each of the gripping elements 38. In this case, it is provided that each of the gripping elements 38 has a pin 44 projecting in the depth direction T, which, when the holding device 20 is used as intended, protrudes in the recess 14 beyond the entrance 18 of the recess 14. The hold-down device 42 has an opening 46 for each pin 44, into which Lisa Dräxlmaier GmbH
[0096] 10.02.2026 0692024-WO-PCT
[0097] 14
[0098] The respective pin 44 can be inserted along the depth direction T. Furthermore, the hold-down device 42 has at least one, in this case two, fastening points 48 via which the hold-down device 42 can be connected to the body component 16.
[0099] For example, the hold-down device 42 can be screwed or welded to the body component 16 at any of the attachment points 48.
[0100] The respective holding devices 20 can serve, on the one hand, as a positioning aid for at least one of the thermally conductive materials 36, in particular with regard to positioning along the longitudinal direction L, and on the other hand, represent a termination along the longitudinal direction L for the respective thermally conductive materials 36 to the front or to the rear, in order to prevent the thermally conductive materials 36 from shearing or peeling off the conductor rails 12 during the installation and / or assembly and / or removal of a complex consisting of the conductor rails 12 with the thermally conductive materials 36 on or in the holding devices 20.
[0101] The holding device 20 is designed such that, due to its shape, it flush-encloses the busbars 12, meaning that the cross-section of the recess 14 is completely closed by means of the holding device 20 and the busbar 12. The respective gripping elements 38 are designed as negative molds of the busbars 12 to be held, so that no air gaps are maintained in the width direction B or in the depth direction T between the respective gripping elements 38 and the busbars 12. If the wall thickness of the projections 40 in the depth direction T were greater than the height of the thermal conductivity material 36 between the two busbars 12 in the depth direction T, then the holding device 20 would maintain an air gap in the depth direction T between at least one of the busbars 12 and the thermal conductivity material 36, which would act as an insulator for heat conduction.In particular, it is provided that the respective holding devices 20 are attached to the busbars 12 before the busbars 12 are placed in the recess 14. In other words, for the assembly of the arrangement 10, it can be provided that the busbars 12 are aligned relative to each other, at least one holding device 20 is arranged around the two busbars 12, and then the assembly consisting of the busbars 12 and the at least one holding device 20 is placed in the recess 14. Lisa Dräxlmaier GmbH.
[0102] 10.02.2026 0692024-WO-PCT
[0103] 15
[0104] Fig. 5 shows the arrangement 10 with the busbars 12 arranged one above the other in the depth direction T in a view cut along the longitudinal direction L. This clearly shows how the thermal conductivity 36 arranged between the busbars 12 and the thermal conductivity 36 arranged between the first busbar 32 and the bottom 22 of the depression 14 are positioned in the longitudinal direction L by means of the gripping elements 38, in particular their projections 40.
[0105] Figure 6 shows an alternative embodiment of the arrangement 10. In this alternative embodiment, the body component 16 has two recesses 14 running parallel to each other along their longitudinal axis. A conductor rail 12 is recessed horizontally in each of the recesses 14.
[0106] A thermal conductivity material 36 is arranged between the respective busbar 12 and at least one wall of the body component 16 that bounds the associated sink 14.
[0107] Figure 7 shows the arrangement 10 in the embodiment according to Figure 6 with the two parallel recesses 14, each of the recesses 14 being covered by a cover 50. In this case, the inlets 18 of both recesses 14 are covered by a single cover 50 along a section of the recesses 14. This means that the busbars 12 arranged in the respective recesses 14 are completely enclosed along this section by the respective walls of the body component 16 and the cover 50 that define the recess 14.
[0108] In Fig. 8, the arrangement 10 in the embodiment shown in Fig. 7 with the cover 50 is shown in a sectional view. The respective recesses 14 and the respective busbars 12 are shown in a sectional view perpendicular to the longitudinal direction L.
[0109] In the illustration shown in Fig. 8, it can be seen that a functional layer 52 is arranged between each of the busbars 12 and the cover 50 in the depth direction T. This functional layer 52 rests against both the inside of the cover 50 and the respective busbar 12. The functional layer 52 can be provided, in particular, by a fleece or a mat. Specifically, the respective functional layer 52 serves as rattle protection and / or abrasion protection and / or heat conduction. The functional layer 52 can thus prevent the cover 50 from repeatedly striking the respective busbar 12 and thereby causing a rattling noise. Lisa Dräxlmaier GmbH
[0110] 10.02.2026 0692024-WO-PCT
[0111] 16
[0112] Noise is generated. Furthermore, the functional layer 52 prevents the cover 50 from rubbing against the busbars 12, or vice versa. Alternatively or additionally, the functional layer 52 can exhibit good thermal conductivity, allowing heat to be transferred from the busbars 12 to the cover 50, thus enabling particularly efficient cooling of the busbars 12.
[0113] The cover 50 can serve to ensure electromagnetic compatibility. By means of the cover 50, it can be prevented that vehicle components are interfered with by electrical or electromagnetic effects caused by the busbars 12, or that the busbars 12 are interfered with by electrical or electromagnetic effects caused by other vehicle components.
[0114] In the embodiment shown in Figures 6 to 8, the busbars 12 run parallel to each other and side by side in the width direction B. The parallel arrangement of the busbars 12 results in a particularly compact design of the assembly 10 in the depth direction T. For reasons of electromagnetic compatibility and / or as mechanical protection, the busbars 12 can be covered or concealed, at least partially, by the one- or multi-part cover 50.
[0115] It is possible that the respective thermally conductive materials 36 have a greater extent in the lateral direction B than the respective busbars 12, whereby, when the at least one busbar 12 is installed in the recess 14, the thermally conductive material 36 can be applied laterally upwards to at least one of the walls 24, 26 of the body component 16 that laterally delimit the recess 14, and can also be applied to at least one narrow side 30 of at least one of the busbars 12, thereby thermally connecting the at least one busbar 12 laterally to the body component 16 via the at least one narrow side 30. The respective thermally conductive materials 36 can be provided continuously or only sectionally with respect to the longitudinal direction L of the respective busbars 12. The respective thermally conductive material 36 can, in particular, be provided in the form of at least one gap pad. Lisa Dräxlmaier GmbH
[0116] 10.02.2026 0692024-WO-PCT
[0117] 17
[0118] Due to the particularly good heat transfer from the at least one busbar 12 to the body component 16, the respective busbar 12 can be dimensioned particularly small in its cross-section running perpendicular to the longitudinal direction L.
[0119] Overall, the invention demonstrates how busbars can be thermally connected to the body component 16 in a horizontal orientation. Lisa Dräxlmaier GmbH
[0120] 10.02.2026 0692024-WO-PCT
[0121] 18
[0122] REFERENCE MARK LIST
[0123] 10 Arrangement
[0124] 12 busbar
[0125] 14 depression
[0126] 16 Body component
[0127] 18 Entrance
[0128] 20 Holding device
[0129] 22 Floor
[0130] 24 wall
[0131] 26 Wall
[0132] 28 broadside
[0133] 30 narrow side
[0134] 32 busbar
[0135] 34 busbar
[0136] 36 Thermal conductivity
[0137] 38 Gripping element
[0138] 40 lead
[0139] 42 hold-down devices
[0140] 44 pens
[0141] 46 Opening
[0142] 48 Mounting point
[0143] 50 Coverage
[0144] 52 functional layer
[0145] L0 length range
Claims
Lisa Dräxlmaier GmbH 10.02.2026 0692024-WO-PCT 19 PATENT CLAIMS 1. Arrangement (10) of at least one conductor rail (12) on a body component (16) of a motor vehicle, wherein the at least one conductor rail (12) is arranged on a base (22) and a wall (24, 26) of the body component (16), wherein the conductor rail (12) is designed as a flat conductor and is arranged lying on the base (22) and on the wall (24, 26), whereby a first broad side (28) of the conductor rail (12) faces the base (22) and a first narrow side (30) of the conductor rail (12) faces the wall (24, 26) of the body component (16), wherein a thermal conductivity material (36) is arranged between the conductor rail (12) and the base (22) and / or the wall (24, 26) of the body component (16).
2. Arrangement (10) according to claim 1, characterized by the fact that at least one holding device (20) is provided which holds the at least one power rail (12) and is attached to the body component (16).
3. Arrangement (10) of at least one conductor rail (12) on a body component (16) of a motor vehicle, wherein the at least one conductor rail (12) is arranged on a floor (22) and a wall (24, 26), wherein the conductor rail (12) is designed as a flat conductor and is arranged lying on the floor (22) and on the wall (24, 26), whereby a first broad side (28) of the conductor rail (12) faces the floor (22) and a first narrow side (30) of the conductor rail (12) faces the wall (24, 26) of the body component (16), wherein at least one retaining device (20) is provided which holds the at least one conductor rail (12) and is attached to the body component (16) and wherein the retaining device (20) completely encloses the at least one conductor rail (12) in a length range (L0) around its circumference.
4. Arrangement (10) according to claim 2 or 3, characterized by the fact that The holding device (20) provides a horizontal arrangement for two conductor rails (12) arranged one above the other. Lisa Dräxlmaier GmbH 10.02.2026 0692024-WO-PCT 20 5. Arrangement (10) according to claim 4, characterized by the fact that Thermal conductivity material (36) is arranged between the two busbars (12).
6. Arrangement (10) according to claim 5, characterized by the fact that the holding device (20) projects laterally between the two busbars (12), whereby thermal conductivity (36) can be positioned between the busbars (12) by means of the holding device (20).
7. Arrangement (10) according to any one of the preceding claims, characterized by the fact that the body component (16) is a die-cast component.
8. Arrangement (10) according to any one of the preceding claims, characterized by the fact that the at least one conductor rail (12) is recessed in a recess (14) of the body component (16), wherein the conductor rail (12) is arranged lying down in the recess (14), whereby the first broad side (28) of the conductor rail (12) is arranged facing a bottom (22) of the recess (14), a second broad side (28) opposite the first broad side (28) is oriented towards an entrance (18) of the recess (14) and the narrow sides (30) of the conductor rail (12) are arranged facing the respective walls (24, 26) of the body component (16) that laterally delimit the recess (14), wherein thermal conductivity (36) is preferably arranged between the conductor rail (12) and all the walls (24, 26) of the body component (16) that delimit the recess (14).
9. Arrangement (10) according to claim 8, characterized by the fact that The power rail (12) is positioned within the recess (14) by means of the holding device (20).
10. Arrangement (10) according to claim 8 or 9, characterized by the fact that In the depression (14) two busbars (12) are arranged one above the other, Lisa Dräxlmaier GmbH 10.02.2026 0692024-WO-PCT 21 which do not protrude beyond the inlet (18) of the sink (14), between which thermally conductive material is preferably arranged (36).
11. Arrangement (10) according to one of claims 8 to 10, characterized by the fact that the body component (16) has two parallel recesses (14), in each of the recesses (14) at least one busbar (12) is recessed.
12. Arrangement (10) according to any one of claims 8 to 11, characterized by the fact that the entrance (18) of the sink (14) is covered by a cover (50), whereby the at least one busbar (12) is completely enclosed on its circumference by the respective walls of the body component (16) and the cover (50) that define the sink (14).
13. Arrangement (10) according to any one of claims 2 to 7, characterized by the fact that A cover (50) is arranged between two holding devices (20) that hold the power rail (12).
14. Arrangement (10) according to claim 12 or 13, characterized by the fact that a functional layer (52) is arranged between the busbar (12) and the cover (50), which is designed to be in contact with both the busbar (12) and the cover (50).