busbar arrangement

Abstract

Busbar arrangement (2) for electrical power supply for a motor vehicle (34) with two conductor rails (4), in particular a ground rail (4B) and a supply rail (4A), wherein the two conductor rails are part of a laminate composite (12) and are laminated in at least one laminating film (10), wherein the laminate composite (12) further comprises at least one additional supply channel (8) which extends along the conductor rails (10).

Description

[0001] The invention relates to a busbar arrangement for the electrical power supply of a motor vehicle.

[0002] When installed, the busbar system is therefore a key component of a vehicle's electrical system, supplying a multitude of electrical components within the vehicle with electrical energy and power. The busbar system is used, for example, as a battery line or more generally as a main power supply line, the so-called backbone. Such a line typically runs from the front to the rear of the vehicle. The busbar system is typically designed to transmit high currents of at least several tens of amps and typically more than 100 amps.Such a main supply line can be used both in low-voltage electrical systems with a system voltage of less than 60V, for example 12V or 48V, or preferably also for high-voltage applications, for example in connection with electrically driven vehicles with voltages in the range of several hundred volts and for example in the range of 300V to 1000V.

[0003] Such busbar arrangements often use direct current (DC) lines, where one busbar is designed as the supply line (outward conductor) and is connected to a positive reference potential, for example, to the positive terminal of the battery. The other busbar is designed as a ground line (return conductor), which is connected to ground potential and / or to the negative terminal of the battery.

[0004] Several technical requirements apply to such main power supply lines (backbone): High direct currents can generate strong magnetic fields, which in unfavorable cases can lead to high, impermissible magnetic fields in the passenger compartment. This problem occurs particularly in electrically powered vehicles, where a traction battery is often located beneath the floor and electrical supply lines are routed within the passenger compartment. In this case, the otherwise existing shielding effect of the floor is lost.

[0005] To reduce interfering magnetic fields and improve EMC (electromagnetic compatibility), it is known to stack the busbars of the supply conductor and the ground conductor in layers on top of each other. Such a stacked arrangement can be found, for example, in DE 10 2015 220 115 B4.

[0006] The high currents also result in high thermal stress and / or the need for large conductor cross-sections. Overall, such main supply lines require a large amount of installation space.

[0007] Sometimes the manufacture and assembly of such busbar systems are complex and expensive.

[0008] US patent 9 941 187 B2 describes a power converter in which several power cards with multiple coolers are stacked and laminated together.

[0009] US 2018 / 0 174 716 A1 describes a laminated flat conductor arrangement with end-side connection terminals for each of the flat conductors arranged side by side.

[0010] US patent 2017 / 0229379 A1 discloses a busbar arrangement with two flat conductor busbars, between which an insulating plate is arranged. The ends of the two busbars are each covered with an insulating layer. Further prior art is known from DE 102016114943 A1.

[0011] Based on this, the invention aims to provide a busbar arrangement, particularly for use in a motor vehicle, which is suitable in view of the aforementioned requirements.

[0012] The problem is solved according to the invention by a busbar arrangement for the electrical power supply of a motor vehicle with two conductor rails, namely in particular with a ground rail and with a supply rail. The two conductor rails are part of a laminate composite and are laminated in at least one laminating film. The laminate composite further comprises at least one additional supply channel which extends along the conductor rails.

[0013] In this context, "laminate composite" means that the components—namely, the two conductor rails and the additional supply channel—are together surrounded by at least one laminating film and preferably completely enclosed circumferentially, thus forming a package that is a prefabricated assembly unit. Furthermore, the at least one laminating film is bonded to at least one, preferably several, and in particular all of these components by a lamination process. This means that the laminating film is materially bonded to this at least one component as a result of the lamination process. Lamination processes known per se are used for this purpose. For example, the materially bonded connection is formed by heating the laminating film during the lamination process, such that a surface of the laminating film is first heated and, if necessary,The material is softened and then hardened to form a bond (hot lamination process). The laminating film is specially designed and, for example, has a carrier layer and an adhesive layer with which a bond is formed. In principle, the laminating film can consist solely of a suitable carrier layer. Cold lamination processes, in which no heating is required, are also possible.

[0014] Laminating film is generally a plastic film that is flexible enough to conform to and adapt to the geometry of the components.

[0015] In this context, a supply channel is generally understood to be a cavity extending along the conductor rails, through which functional components are supplied with, for example, operating fluids, consumables, electrical power, or electrical data. These functional components include, in particular, electrical (power) consumers, electrical communication units, sensors, actuators (especially for driver assistance systems), but also, for example, components requiring fluid supply, such as cleaning devices that use a cleaning agent as a consumable, or internal combustion engines or other drive components that require fuel or oil, or components requiring cooling that are supplied with coolant. The term "fluid" refers specifically to gases or liquids.

[0016] The busbars are primarily solid rails made from a single piece of material. Alternatively, they can also be made from, for example, a crimped or stranded wire composite. The busbars typically have a rectangular cross-section, which, for example, has a length-to-width ratio of at least 4:1 or higher, and a ratio of at least 8:1 (e.g., up to 15:1, specifically 10:1). The nominal cross-section is sufficiently large to reliably transmit the aforementioned currents during operation.

[0017] The ground rail is designed for (direct or indirect) connection to a ground potential and / or to the negative terminal of a battery and is connected to it when installed. The supply rail is designed for (direct or indirect) connection to a supply voltage and, in particular, to connection to the positive terminal of a battery, and is connected to it when installed.

[0018] The busbar system is used particularly as a backbone in motor vehicles.

[0019] The design of the conductor rail assembly as a laminate composite with the two conductor rails and the additional integrated supply channel allows for the integration of a further supply line while maintaining a compact overall design. At the same time, manufacturing and, in particular, assembly effort are kept to a minimum, as no additional assembly work is required for this extra supply line; instead, it is installed together with the conductor rails as a package and assembly unit. Specifically, the lamination film also provides a means of easily attaching the conductor rail assembly to a supporting component, such as a body panel of a vehicle.

[0020] Further advantages of laminate composites include the insulation provided by the laminating film, potentially eliminating the need for additional insulation measures, at least in part. The laminating film also offers the possibility of providing fastening options for the laminate composite.

[0021] The busbar assembly, when installed, is part of a motor vehicle, specifically a passenger car. The motor vehicle is preferably an electrically powered vehicle.

[0022] According to a preferred embodiment, the at least one supply channel is designed as, or comprises, a fluid channel for a fluid. The fluid channel is, in particular, a flow channel which, in the connected state, is connected at its end to a functional component to be supplied via connection components and / or integrated into a circuit. The fluid channel is open to flow during operation. The fluid is, in particular, circulated in a loop. It is a liquid or a gas and is not intended to remain permanently in the channel, as is the case, for example, with adhesives. The fluid is, in particular, not an adhesive.

[0023] This provides a compact fluid supply to a functional component along the conductor rail arrangement. The fluid channel can also be referred to as a media channel. For example, the supply channel itself can be designed as the fluid channel, with the fluid flowing directly through its cavity. Alternatively, an additional fluid channel, such as a flexible hose, can be inserted into the supply channel as a separate element.

[0024] The supply channel, and thus the fluid channel, is preferably arranged directly adjacent to one of the two conductor rails. This generally achieves thermal equilibrium between the fluid and at least one of the conductor rails, meaning that heat transfer occurs between the at least one conductor rail and the fluid during operation. Typically, this results in the fluid heating up or the conductor rails cooling down. This prevents thermal overload of the conductor rails, and the cooling of the conductor rails reduces their temperature and thus their resistance during operation compared to an uncooled version. This can also be used to reduce the cross-section of the conductor rails.

[0025] In a preferred embodiment, the fluid channel is designed to hold cleaning fluid and to be connected to a corresponding reservoir. During operation, the cleaning fluid flows through the channel and is heated by the waste heat from the conductor rails. The cleaning fluid is used to clean, for example, lenses (windshield, headlights) and, in particular, sensors. Specifically, these are optical sensors and / or so-called ADAS sensors for a driver assistance system. The heating enhances the cleaning effect.

[0026] In addition to the design of the supply channel as a fluid channel, at least one supply channel is alternatively used as a channel for laying another supply line, specifically an electrical conductor element, such as a supply line or data line.

[0027] In a suitable embodiment, the laminate assembly has at least one mounting flange arranged laterally next to the conductor rails, which extends in particular over the entire length and along the conductor rails. This mounting flange is formed by the at least one laminating film. The laminating film projects laterally, forming a protruding tab. This facilitates easy assembly. Preferably, mounting flanges are formed on both sides by the at least one laminating film.

[0028] In a practical design, this mounting flange incorporates mounting openings which, when assembled, are penetrated by fasteners such as clips, screws, pins, etc. These mounting openings are typically longitudinal slots or elongated holes. They are usually created during the laminate manufacturing process after the lamination process, for example, by punching or cutting (mechanically / with a laser).

[0029] In a preferred embodiment, the laminate composite comprises several laminating films, each forming a lateral flange, with the flanges of the at least two laminating films arranged one above the other to form the mounting flange. Typically, only the laminating films are present in the area of ​​the mounting flanges. The at least two-layer design stiffens the mounting flange, thus enabling reliable fastening.

[0030] In a preferred embodiment, the at least one laminating film forms insulation for at least one of the conductor rails. At least one of the conductor rails is in direct contact with the bare conductor material of the laminating film. A bare conductor rail where the laminating film is in direct contact with the bare conductor material is hereinafter also referred to as an uninsulated conductor rail, since it does not have its own additional insulating sheath. In such an embodiment, at least one of the conductor rails therefore lacks its own separate insulating sheath. In a preferred embodiment, both conductor rails are each designed as uninsulated conductor rails, with the at least one laminating film providing the insulation.

[0031] The described laminate composite can, in principle, have various configurations.

[0032] According to a preferred first embodiment, the laminate composite has a channel element similar to a cable duct, which is laminated into the composite and has several chambers to form individual supply channels. The channel element is typically made of plastic and is also designed as a rail or profile extending along the conductor rails. The multiple chambers allow for a multitude of supply channels, each preferably accommodating exactly one supply component. Alternatively or additionally to the fluid channel described above, electrical supply lines, electrical or optical data lines, or other lines can be inserted into the chambers as supply strands.These supply strands are preferably inserted into the chambers before the lamination process or threaded into them after the lamination process. They typically lie loosely in the chambers.

[0033] In cross-section, the channel element preferably has a base from which several partitions project, between which the individual chambers are formed as longitudinal channels. The individual chambers of the channel element are preferably open at the top and, for example, covered only by at least one laminating film or one of the conductor rails.

[0034] In a preferred embodiment, the conductor rails and the channel element are stacked on top of each other. Specifically, the channel element rests on one of the conductor rails, particularly with its base, so that the separating webs protrude on the side facing away from the conductor rails.

[0035] Preferably, in cross-section, the channel element has the same width as a given conductor rail. Generally, the two conductor rails preferably have the same width.

[0036] In a practical configuration, different types of supply lines are arranged in the multiple supply channels. Specifically, each supply channel contains exactly one supply line. When different types of supply lines are mentioned, this initially means that they differ in their type and are, for example, designed as fluid lines, electrical lines (supply lines as well as data or control lines), or optical lines, etc. In a preferred embodiment, "different types" additionally means that different types, i.e., subtypes, of supply lines are present within a single type.Specifically, there are different electrical supply lines, which differ, for example, in terms of their voltage level, whether they are designed as supply lines for electrical power supply or merely as data lines or control lines, etc.

[0037] According to a preferred embodiment, at least part of the supply lines is designed as electrical conductors that do not have an insulating sheath. That is, a bare conductor or conductor assembly is located in the supply channel. The required electrical insulation is provided by the channel element, particularly in conjunction with the laminating film.

[0038] According to a preferred embodiment, the two conductor rails form a partial assembly and are laminated in a first laminating film. The channel element is placed on this partial assembly and connected to it by means of a second laminating film. The channel element is therefore laminated between the second laminating film and the partial assembly. This achieves a staged manufacturing process and, at the same time, simple integration of the channel element into the overall assembly.

[0039] Specifically, the channel element with its integrated supply lines is prefabricated. For this purpose, the individual supply lines are inserted into the individual (longitudinal) chambers, for example, clipped in, so that they are secured against falling out. This pre-assembled channel element is then laminated with the second lamination film to form the complete laminate assembly.

[0040] Preferably, the two laminating films have different material properties. Specifically, one laminating film, particularly the one used for partial lamination, has better electrical insulating properties (compared to the other laminating film). In contrast, the other laminating film has better mechanical properties (especially greater stiffness).

[0041] Due to its high mechanical rigidity, the busbar arrangement is particularly suitable for automated mounting.

[0042] In a preferred embodiment, one conductor rail is designated as a ground rail and arranged between the channel element and the supply rail. This embodiment is based on the consideration that, during operation, electromagnetic interference fields largely cancel each other out due to the directly adjacent arrangement of the two conductor rails. Therefore, a largely field-free space exists above the two conductor rails, and especially above the ground rail. This is now exploited by arranging the channel element in this largely field-free space, in which electrical lines, specifically data lines, are preferably routed.

[0043] During operation, a slightly lower current typically flows through the ground bus than through the power bus, because part of the return conductor is often formed by the vehicle's body, thus creating a current divider and splitting the current between the ground bus and the body. A larger portion flows through the ground bus and a smaller portion through the body.

[0044] The geometry described here creates an area with low electromagnetic interference above the ground rail, as these interferences cancel each other out. Since, as mentioned, a slightly lower current flows above the ground rail than above the supply rail, an asymmetry arises in the electromagnetic fields, resulting in a relatively low-field area directly above the ground rail compared to the surrounding area.

[0045] In a preferred embodiment, one of the two conductor rails, specifically the conductor rail arranged in the middle, is designed as an uninsulated conductor rail. The second conductor rail, in contrast, is preferably provided with an insulating sheath.

[0046] Due to the special arrangement, which results in a largely interference-free space in the immediate vicinity of the conductor rails, additional shielding can and preferably is generally omitted in the laminate assembly. Specifically, for example, the electrical conductors arranged in the channel element have no shielding.

[0047] According to a preferred second embodiment, which can also be combined with the first embodiment, the two conductor rails lie on top of each other and enclose a cavity between them, which forms at least one supply channel. This results in a particularly compact design, since the supply channel is sandwiched between the two conductor rails.

[0048] Advantageously, at least one of the conductor rails forms a groove open to the side, which, together with the other conductor rail, forms the cavity. Preferably, both conductor rails each have a groove open to one side, whereby, in the assembled state, the two grooves face each other and thus form the cavity. Each conductor rail is therefore designed as a contoured, rather than flat, rail. The groove in each conductor rail forms a partial cavity, which together constitute the cavity.

[0049] Specifically, the conductor rail in the area of ​​the groove has an arc-shaped cross-section.

[0050] In a preferred further development, at least one conductor rail has several grooves for forming multiple supply channels. The multiple grooves are therefore arranged side by side, and the conductor rail is thus provided with several longitudinal channels. This design offers the advantage, particularly when integrated into a circuit, that both a supply and a return line are directly integrated into the laminate assembly.

[0051] In cross-section, the conductor rail in this design, with at least two cavities, preferably has several adjacent arcs.

[0052] In a preferred embodiment, each of the conductor rails has two adjacent half-slots, wherein the half-slots of the two conductor rails face each other and each form a supply channel.

[0053] It should be emphasized that the supply channel is not formed within a particular conductor rail, but is merely bounded by it. The outer surface of each conductor rail therefore forms a channel wall.

[0054] The resulting cavity preferably has a circular cross-section.

[0055] In each case, it is specifically a free cavity for a fluid, in which there is no cable, conduit or other (solid) component.

[0056] The conductor rails preferably do not have an edge flange on either side of each groove. The two conductor rails therefore rest against each other with their edge end faces.

[0057] In a preferred embodiment, each conductor rail is laminated in a laminating film. Each conductor rail and the laminating film thus form a partial assembly. Preferably, both conductor rails are uninsulated, so that the laminating film essentially forms an insulating sheath for each conductor rail.

[0058] The term "laminated" here means that the laminating film is in direct contact with the conductor rail, especially the bare conductor rail, at least on part of its circumference.

[0059] Preferably, at least one laminating film surrounds one of the conductor rails circumferentially, preferably completely, and therefore rests against the respective conductor rail over its entire circumference. For example, the other laminating film also rests completely against the other conductor rail circumferentially.

[0060] In a preferred embodiment, only one of the conductor rails is fully enclosed by its associated laminating film. The other conductor rail rests on this one, preferably as a bare conductor rail. This assembly is then at least partially or even completely enclosed by the further laminating film. This further laminating film preferably has the mounting flange described below or at least partially forms it.

[0061] The laminating films preferably extend laterally, forming an edge flange. Preferably, each sub-assembly has an edge flange on both sides. The two sub-assemblies, and thus the two laminating films, lie on top of each other and are preferably bonded together. They form a mounting flange with which the laminate assembly can be attached to a supporting component. The mounting flange preferably has slots or elongated holes.

[0062] In a practical design, a fluid channel is located within the supply channel as a separate element, for example in the form of a hose. This can be inserted subsequently during assembly or placed in the system before the two partially connected parts are joined to form the laminate composite.

[0063] Exemplary embodiments of the invention are explained in more detail below with reference to the figures. These show simplified representations. Fig. 1 a cross-sectional representation of a busbar arrangement according to a first embodiment variant, Fig. 2 a perspective view of the busbar arrangement according to Fig. 1, Fig. 3 a cross-sectional representation of a busbar arrangement according to a second design variant as well as Fig. 4 A representation of a motor vehicle with a power rail arrangement.

[0064] In the figures, parts with the same effect are marked with the same reference symbols.

[0065] Fig. 1 to Fig. Figure 3 shows busbar arrangements 2, each comprising two conductor rails 4, namely a supply rail 4A and a ground rail 4B. In the exemplary embodiments, the conductor rails 4 are each formed as solid conductor rails made of a bare solid material such as copper or aluminum. The entire busbar arrangement 2 extends in a longitudinal direction 6. The busbar arrangement 2 further comprises at least one supply channel 8 and at least one laminating film 10. In the exemplary embodiment, the busbar arrangement 2 has several, in particular two, laminating films 10A, 10B. The individual components, namely the conductor rails 4, the at least one supply channel 8, and the at least one laminating film 10, together form a laminate assembly 12. This forms a prefabricated assembly unit that can be mounted to a support component, for example, a car body floor.The two conductor rails 4 are each arranged one above the other transversely to the longitudinal direction 6.

[0066] In the version according to Fig. 1 and Fig. 2. The two conductor rails 10 are designed as flat conductor rails 10 with a rectangular cross-section, which extends over their entire length. The two conductor rails 10 are stacked on top of each other and their flat sides rest directly against each other. Additionally, the laminate assembly 12 includes a channel element 14, which extends parallel to the conductor rails 10 and thus also in the longitudinal direction 6. The channel element 14 is designed as a profile element, specifically made of plastic. This has a (flat) base 16, which rests directly on the upper of the two conductor rails 4, specifically on the ground rail 4B. Several separating webs 18 extend from the base 16 in a vertical direction perpendicular to the longitudinal direction 6. Between adjacent separating webs 18, a longitudinally extending chamber, resembling a longitudinal channel, is formed as a supply channel 8.Each supply channel 8 contains a supply line 20. Preferably, different types of supply lines 20 are contained in the various supply channels 8. In addition to electrical supply lines or data lines, at least one fluid channel 22 is also included as a supply line 20, for example in the form of a hose.

[0067] In the exemplary embodiment, the two conductor rails 4 together with a first laminating film 10A form a partial assembly 24. In this assembly, (only) the two conductor rails 4 are laminated into the first laminating film 10A.

[0068] In the exemplary embodiment, one of the two conductor rails 4, in particular the ground rail 4B, is designed as a bare, uninsulated conductor rail 4B, which therefore has no insulating sheath of its own. The first laminating film 10A thus forms insulation (the only insulation) for the ground rail 4B. In contrast, the other conductor rail 4, in particular the supply rail 4A, is designed as an insulated conductor rail 4A, which therefore has its own insulating sheath 26 that surrounds the bare conductor material.

[0069] In the manufacturing process, the partial assembly 24 is first prepared, followed by the placement of the channel element 14, which is preferably already equipped with the individual supply strands 20. These are held in the supply channels 8, which are preferably open at the top, for example by clips or some other means. Subsequently, the channel element 14 is bonded to the partial assembly 24 by applying the second laminating film 10B in a lamination process. For this purpose, the second laminating film 10B is laminated onto the partial assembly 24, including the channel element 14.

[0070] Each laminating film 10A, 10B extends laterally at its edge, forming a flange that runs the entire length of the busbar assembly 2. The two flanges of the two laminating films 10A, 10B lie directly on top of each other and are bonded together, forming a mounting flange 28. This flange has recurring recesses 30, particularly in the form of elongated holes, through which it can be fastened to the supporting component.

[0071] It should be emphasized that the stacked arrangement of the two conductor rails 4 ensures that the space above them is largely field-free, making this area ideal for accommodating additional supply lines 20, particularly electrical cables, especially data cables. Additional shielding elements, especially for the data cables, are preferably omitted. Alternatively, the data cables can have individual shielding. At least one shielding element between the conductor rails 4 and the channel element 14 is omitted.

[0072] This structure according to the Fig. 1 and Fig. 2 is characterized in particular by the fact that several different conductor types, and preferably supplemented by at least one fluid line 22, are simultaneously installed in the laminate composite 12. These include – in addition to the conductor rails 4 – in particular 12V / 48V supply lines as well as data or bus lines. Fluid lines include, for example, cooling lines, lines for brake fluid, compressed air, or fuel, etc.

[0073] The two conductor rails 4A, 4B form a backbone, for example in a 12V or 48V electrical system or for higher electrical system voltages.

[0074] In the version according to Fig. In Figure 3, two fluid channels 22 are formed between the two conductor rails 4A and 4B. Each conductor rail 4A or 4B has two half-slots, each forming a partial cavity. The half-slots of the two conductor rails 4A and 4B face each other and form a common cavity, which constitutes the supply channel 8. The cavity is circular in cross-section. A separate supply line 20, for example in the form of a hose, is located within each of these supply channels 8 as a fluid channel 22. The supply line 20 completely fills the supply channel 8 formed by the cavity.

[0075] The conductor rails 4A, 4B are each designed in cross-section in the manner of a double arc, wherein the end faces of the two conductor rails 4A, 4B are each directed towards each other and preferably support each other reciprocally.

[0076] Each conductor rail 4A, 4B is surrounded by a laminating film 10A, 10B and essentially laminated within it. The conductor rails 4A, 4B are bare, uninsulated conductor rails 4A, 4B. Each conductor rail 4A, 4B therefore forms a partial assembly with its laminating film 10A, 10B, with the two partial assemblies forming the laminate assembly 12.

[0077] In this design variant, flanges also protrude from the edges, which rest on each other in the assembled state and are connected to each other in a material-bonded manner, for example by a lamination process, and also form a fastening flange 28.

[0078] The laminating films 10A and 10B can – as in the first variant – be different and optimized for different properties (electrical insulation / mechanical stiffness). In the exemplary embodiment, they are preferably... Fig. 3, however, are identical.

[0079] In the Fig.Figure 4 illustrates the application of the busbar assembly 2 as a backbone in a motor vehicle 34, which may be an electrically powered vehicle. The busbar assembly 2 typically extends from a front to a rear section of the vehicle. The length of the busbar assembly is typically greater than 1 m, preferably greater than 1.5 m or even greater than 2 m. It is designed to transmit high currents of at least several tens of amps, typically more than 100 amps. The busbar assembly 2 connects two electrical components, in this embodiment a DC / DC converter 36 or alternatively a battery, to a power distributor 38. The busbar assembly 2 is, for example, mounted on a battery cover, which is a body component 40. The battery cover is part of a traction battery, which is not shown in detail here.The battery cover also forms the underside of a passenger cell, which is not shown in detail here.

[0080] At at least one end, the busbar assembly 2 has conductor sections serving as electrical connection terminals 42, which connect the busbar assembly 2, namely the supply conductor 4A and the ground conductor 4B, to suitable contact connections of the converter 36 (or to other electrical components, including a battery). In addition, fluid connections 44 are provided in the exemplary embodiment, via which a fluid channel 22 of the busbar assembly 2 is connected. For example, a fluid supply to a cleaning device 46 is provided, which is connected to a reservoir 48 via the fluid channel. The cleaning device 46 is, for example, a cleaning device for the windshield, for headlights, or for sensors.

[0081] In the power distribution unit 38, the conductor rails 4 are typically connected to a power distribution unit 50. Several supply lines, each protected by fuses, branch off from this unit to supply energy to consumers not shown in detail here.

[0082] In general, the individual supply lines 20 of the busbar assembly 2 are connected at their ends to connection terminals, which are, for example, electrical connection terminals or fluid connections. These are, for example, connectors to which connecting cables can then be routed. Alternatively, the individual components of the busbar assembly 2 can also be connected directly to a respective functional component. For this purpose, the supply lines are routed out of the laminate assembly 12 and led to the functional components to be supplied.

[0083] The entire conductor rail assembly 2 is attached to a support of the motor vehicle 34, in particular via the mounting flange 28 described in the preceding figures. Due to the high rigidity, automated mounting is particularly possible and also provided for. Reference symbol list 2 busbar arrangement 4 conductor rail 4A power supply rail 4B Ground rail 6 Longitudinal direction 8 supply channel 10 laminating sheets 10A first laminating pouches 10B second laminating film 12 Laminate composite 14 channel element 16 Floor 18 dividers 20 Supply line 22 Fluid channel 24 sub-groups 26 Insulation jacket 28 Mounting flange 30 exceptions 34 Motor vehicle 36 converters 38 power distributors 40 Body component 42 Connection terminal 44 Fluid connection 46 Cleaning equipment 48 storage containers 50 power distribution boxes

Claims

[1] Busbar arrangement (2) for electrical power supply for a motor vehicle (34) with two conductor rails (4), in particular a ground rail (4B) and a supply rail (4A), wherein the two conductor rails are part of a laminate composite (12) and are laminated in at least one laminating film (10), wherein the laminate composite (12) further comprises at least one additional supply channel (8) which extends along the conductor rails (10). [2] Busbar arrangement (2) according to the preceding claim, wherein the at least one supply channel is designed as a fluid channel (22) for a fluid or has such a fluid, wherein the fluid channel (22) in the installed state is in particular through which a cleaning fluid flows, which is heated by the waste heat of the conductor rails (4). [3] Busbar arrangement (2) according to one of the preceding claims, wherein the laminate composite (12) forms at least one mounting flange (28) arranged laterally next to the conductor rails (4), which is formed by the at least one laminating film (10). [4] Busbar arrangement (2) according to one of the preceding claims, wherein the laminate composite (12) has several laminating films (10) which each form a lateral flange which are arranged one above the other to form the mounting flange (28). [5] Busbar arrangement (2) according to one of the preceding claims, wherein the at least one laminating film (10) forms insulation for at least one of the conductor rails (4) and for this purpose rests against a bare conductor material of the at least one conductor rail (4). [6] Busbar arrangement (2) according to one of the preceding claims, wherein the laminate composite (12) has a channel element (14) which is laminated into the laminate composite (12) and which has several chambers to form a respective supply channel (8). [7] Busbar arrangement (2) according to the preceding claim, wherein different types of supply lines (20) are arranged in the multiple supply channels (8). [8] Busbar arrangement (2) according to one of claims 6 to 7, wherein at least part of the supply lines (20) are electrical conductors that do not have an insulating sheath (26). [9] Busbar arrangement (2) according to one of claims 6 to 8, wherein the two conductor rails (4) form a partial assembly (24) and are laminated in a first laminating film (10A) and the channel element (14) is placed on the partial assembly (24) and is connected to the first partial assembly (24) by means of a second laminating film (10B). [10] Busbar arrangement (2) according to the preceding claim, wherein the two laminating films (10A, 10B) have different material properties. [11] Busbar arrangement (2) according to one of claims 6 to 10, wherein one of the conductor rails is designed as a ground rail (4B) and is arranged between the channel element (14) and the supply rail (4). [12] Busbar arrangement (2) according to one of the preceding claims, wherein a shielding element is omitted. [13] Busbar arrangement (2) according to one of the preceding claims, wherein the two conductor rails (4) (each surrounded by a laminating film (10)) rest on each other and enclose a cavity between them which forms the at least one supply channel (8). [14] Busbar arrangement (2) according to the preceding claim, wherein at least one of the conductor rails (4A) forms a groove open to one side which, in conjunction with the other of the conductor rails (4B), forms the cavity. [15] Busbar arrangement (2) according to the preceding claim, wherein several grooves are formed for several supply channels (8). [16] Busbar arrangement (2) according to one of claims 14 to 15, wherein the at least one conductor rail (4) is formed in cross-section in an arc-shaped manner to form the groove, so that each conductor rail (4) forms a partial cavity and the two partial cavities are facing each other, so that the cavity is formed. [17] Busbar arrangement (2) according to one of claims 14 to 16, wherein each of the conductor rail (4) forms two adjacent half-slots which each form a supply channel (8) between them. [18] Busbar arrangement (2) according to one of claims 14 to 17, wherein each conductor rail (4) is laminated in a laminating film (10). [19] Busbar arrangement (2) according to the preceding claim, wherein a respective laminating film (10) extends laterally and forms a flange, and the two flanges rest on each other and form a mounting flange (28). [20] Busbar arrangement (2) according to one of claims 14 to 19, wherein a fluid channel (22) / hose is located within the at least one supply channel (8).

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