Electrical line connection for electrical contact

Abstract

The invention relates to an electrical line connection (1) having a cross-sectional transition region (11) from a flat strip-shaped cable (1) to a cable (2), in particular a circular cable,-wherein an electrical connection between a conductor track (1.1) of the flat strip-shaped cable (1) and a conductor (2.1) of the cable (2) is provided in the cross-sectional transition region (11); the cross-sectional transition region (11) has an encapsulation (12) for electrical insulation, a first sealing means (1.3) being a double-sided adhesive tape (4) and a second sealing means (2.3) being arranged on the flat strip cable (1) and on the cable (2), the first sealing means (1.3) being a double-sided adhesive tape (4) and the second sealing means (2.3) being a double-sided adhesive tape (4). The adhesive tape is arranged on two opposite surfaces of the flat ribbon cable (1), and wherein the second sealing means (2.3) have one, two or more sealing lips (2.4).

Description

Technical Field

[0001] The invention relates to an electrical line connection having a cross-sectional transition region and to a substrate comprising a functional element and a composite pane comprising at least one such line connection. Background Art

[0002] In the case of composite panes having at least two rigid panes and an intermediate layer connecting the panes in a planar manner and electrical components, such line connections usually include a transition from a flat ribbon cable to a cable. Components installed in the composite pane can be heating components, antenna elements and flatly installed functional elements, which can be electrically contacted via so-called busbars. Composite panes equipped in this way can be used as glazing units in automobiles, as windshields, rear panes and side panes or also in the construction sector.

[0003] In the industrial production of composite sheets, functional elements with electrically controllable optical properties are used, for example, as top sheets. The functional elements are embedded in the composite sheets. During the production of the composite sheets, the functional elements are cut from the multilayer film to the desired size and shape and inserted between the films of the intermediate layers. A typical intermediate layer is a polyvinyl butyral film, which, in addition to its adhesive properties, has high toughness and high acoustic damping properties. The intermediate layer prevents the composite sheet from disintegrating in the event of damage. The composite sheet merely cracks, but remains dimensionally stable.

[0004] This composite sheet comprises a functional element, which typically comprises an active layer between two surface electrodes. The optical properties of the active layer can be changed by a voltage applied to the surface electrodes. An example of this is an electrochromic functional element. Another example is an SPD functional element (suspended particle device) or a PDLC (polymer dispersed liquid crystal) functional element. By applying a voltage to the flat electrodes, the transmission of visible light can be controlled by an electrochromic or SPD / PDLC functional element.

[0005] SPD functional elements and PDLC functional elements are available on the market as multilayer films. The surface electrodes required for applying voltage are arranged between two PET carrier films. The surface electrodes can be electrically conductively connected to the control module (ECU) outside the composite sheet via flat strip conductors. The control module is configured to apply voltage between the surface electrodes.

[0006] In order to lead the flexible line connection out of the interior of the composite sheet as an external connection, flat lines are usually used, which consist of at least one thin carrier substrate and at least one metal conductor track (conductor strip). In addition, a further covering layer can be provided, so that the flat ribbon conductors form a three-layer laminate as a whole. The flat ribbon conductors are welded to the connection surface near the edge of the composite sheet and are only guided outwards over the edge, where they are connected to the round cable at a distance relative to the edge. The connection point of the two lines is embedded in a packaging part composed of insulating material. Since moisture cannot be prevented from penetrating into the packaging part, interference may occur at the joint due to sealing failure.

[0007] EP1058349A1 discloses a structure for connecting an electric cable and a flat cable. Both the cable and the flat cable contain elastic sealing materials at their end portions. When the two cables are surrounded by injection molding in the area of ​​the connecting portion, the elastic sealing materials are bonded to the outer surface of each cable by compression.

[0008] GB2539834A describes an electrical connection part, which electrically connects a flat cable and a cable, and the electrical connection part comprises a first sealing part, an optional second sealing part and a sheath, wherein the sheath at least covers the first sealing part and the electrical contact part.

[0009] WO2013 / 178727A1 relates to an electrical plug connector, which comprises an electrical cable surrounded by an insulating sheath and a housing arranged on a portion of the electrical cable. A seal arranged on the electrical cable surrounds the insulating sheath in a sealing manner. Summary of the invention

[0010] The object of the present invention is to provide an improved electrical line connection which ensures a secure and durable watertight seal at the cross-sectional transitions.

[0011] The object of the invention is achieved according to the invention by an electrical line connection according to independent claim 1. Preferred embodiments of the invention emerge from the dependent claims.

[0012] The present invention comprises an electrical line connection having a cross-sectional transition region from a flat ribbon cable to a cable, in particular a round cable, the flat ribbon cable comprising at least one electrical conductor track and a covering film for electrical insulation of the conductor track. In addition, the cable comprises an electrical conductor. An electrical connection between the conductor track of the flat ribbon cable and the conductor of the cable is provided in the cross-sectional transition region. The cross-sectional transition region has an encapsulation for electrical insulation. A first sealing device is provided at the flat ribbon cable, and a second sealing device is provided at the cable. When the encapsulation is attached to the line connection, the first sealing device is firmly pressed against the flat ribbon cable, and the second sealing device is firmly pressed against the cable, in particular a round cable, thereby creating a seal around the respective cable. This arrangement of the sealing device (seal) ensures that water is prevented from penetrating into the encapsulation by capillary effect.

[0013] According to the present invention, the first sealing device is a double-sided adhesive tape, which is arranged on the opposite surfaces of the flat ribbon cable. The first sealing device can be particularly preferably arranged around the flat ribbon cable. The bonding of the adhesive tape advantageously supports the bonding of the encapsulation part to the flat ribbon cable, so that the connection between the encapsulation part and the flat ribbon cable is very tight and stable. In particular, the adhesive tape can be an acrylic adhesive tape. Additionally, the adhesive tape can be transparent. The material thickness of the adhesive tape can be 25μm to 2mm, preferably 100μm to 150μm, and particularly preferably 130μm [micrometer].

[0014] The encapsulation may completely or only partially cover the first sealing means and the second sealing means. Complete closing of the sealing means effectively closes off passages for particles and water and their infiltration into the encapsulation in order to prevent damage to the line connection.

[0015] The second sealing device may have an annular shape, the second sealing device being flush around the cable, in particular a round cable, i.e. the second sealing device is arranged completely around the cable. In this case, during production, the second sealing device may be fixed and molded to the cable. The second sealing device may be installed at the cable before the encapsulation is manufactured. The second sealing device may be designed as a collar portion at the cable.

[0016] The second sealing device has one, two or more sealing lips. The circumferential sealing lip extends at a portion of the second sealing device that points outward in the radial direction. Due to the one or more sealing lips, a higher water resistance of the electrical line connection portion can be achieved. Two or more sealing lips can be arranged one behind the other in the direction of cable extension and can be spaced apart from each other. The two or more sealing lips can have outer edges that extend parallel to each other. Additionally, the second sealing device can partially have a corrugated surface on its surface facing the cable. The second sealing device can contain silicone, polyvinyl chloride or a thermoplastic elastomer.

[0017] In another embodiment of the electrical line connection according to the invention, the conductor tracks of the flat ribbon cable can be electrically conductively connected to the conductors of the cable by means of a soldered connection. Alternatively, the electrical connection can also be produced via an adhesive connection with the aid of an electrically conductive adhesive. The electrically conductive adhesive contains at least one electrically conductive material, preferably a metallic material, such as silver, gold or aluminum. It is also possible that the electrically conductive adhesive contains a non-metallic electrically conductive material, such as graphite or carbon. The at least one electrically conductive material is introduced into a non-conductive adhesive matrix, such as an epoxy resin. The at least one electrically conductive material is contained in the adhesive in such an amount that the desired current carrying capacity is achieved. Preferably, the at least one electrically conductive material is contained in the adhesive in a mass fraction of at least 70%.

[0018] The flat ribbon cable comprises at least one electrical conductor track, which is applied to a first covering film as a carrier substrate made of a plastic material, and the at least one electrical conductor track can also be covered by the first covering film. The covering layer forms an insulating sheath, which surrounds the electrical conductor track. The covering film preferably contains polyimide (PI) or polyester, particularly preferably polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), or consists of them. The covering film can also consist of an electrical insulating varnish, preferably a polymer varnish. The covering film can also contain thermoplastics and elastomers, such as polyamide, polyoxymethylene, polybutylene terephthalate or ethylene-propylene-diene rubber or consist of them. Alternatively, potting materials such as acrylate or epoxy resin systems can also be used as covering films. Such covering films are cost-effective and simplify the production process.

[0019] In particular, flexible and / or elastic flat ribbon cables are used for electrical connection to electrical components or surface electrodes. Flat ribbon cables are two-dimensional bodies with two opposite sides, which can be optionally made into a flat or curved shape. In a flat (i.e. non-bent) state, the flat ribbon cable is arranged in a plane. Flat ribbon cables are generally elongated and have two ends along their extension direction. Flat ribbon cables can also be provided with a plurality of (especially parallel) electrical conductor tracks. The flat ribbon cable can preferably have up to 32 conductor tracks, in particular preferably 8 to 10 conductor tracks. The conductor tracks are arranged in a common plane. Each conductor track can have a rectangular cross-section. Flat ribbon cable is an elongated electrical component with a plurality of electrical conductor tracks, and its width is significantly greater than its thickness. The flat ribbon cable is formed thin enough (i.e. the thickness is small enough) so that it is flexible and bendable. Its width can be from 0.1 mm to 100 mm.

[0020] Furthermore, the flat ribbon cable comprises at least two connection areas with contact points for the conductor tracks at two ends of the flat ribbon cable which are opposite in the extension direction. The two connection areas of the flat ribbon cable serve for electrically contacting the conductor tracks, for which purpose the cover film (i.e. the carrier layer and / or the insulating layer) is absent or removed at least at the contact points, so that the conductor tracks are accessible.

[0021] The electrical conductor tracks are arranged at least partially adjacent to each other and / or one above the other. In another advantageous embodiment of the invention, at least two electrical conductor tracks are arranged one above the other in at least two planes, and preferably in exactly two planes or exactly three planes or exactly four planes. "Overlapping" here means relative to the extension plane of the flat ribbon cable, i.e. relative to the plane unfolded by the two larger dimensions of the flat ribbon cable. Advantageously, in a projection orthogonal to the extension plane, at least two conductor tracks are arranged identically in each case. Alternatively, the conductor tracks can also be designed larger in one plane and can substantially partially or completely occupy the plane within the flat ribbon cable, preferably minus the insulating edge area. This increases the current carrying capacity of the conductor tracks.

[0022] Each electrical conductor track can be electrically contacted at two contact points spaced apart from one another along the conductor track. A contact point is an area of ​​the conductor track where electrical contact is possible. In the simplest embodiment, the contact point is an accessible area of ​​the electrical conductor track. It may be necessary and expedient here to provide a separate line connection for each pole, so that the conductor track of the flat ribbon cable is provided in each case for connection with the conductor of the cable.

[0023] The conductor tracks are applied by means of printing. Alternatively, the electrical conductor tracks are prefabricated as metal strips made of metal film and laminated on both sides with plastic material. In both cases, the electrical conductor tracks are mechanically stabilized and embedded in an insulating sheath made of a covering film so that they are electrically insulated from the external environment.

[0024] The metal film may comprise or consist of a copper film, an aluminum film, a stainless steel film, a tin film, a gold film or a silver film. The metal film may also comprise or consist of an alloy with the above metals. The metal film may advantageously be partially tin-plated or completely tin-plated. This is particularly advantageous for achieving good solderability while providing corrosion protection.

[0025] In an advantageous embodiment of the flat ribbon cable according to the invention, the at least one conductor track has a thickness of 35 μm to 100 μm, and preferably 50 to 70 μm. The conductor track or the plurality of conductor tracks each contain, for example, a thin copper film, a silver film, a tin film or a gold film. The film can be additionally plated, for example, silver-plated, gold-plated or tin-plated. The thickness of the film is, for example, 35 μm, 50 μm, 75 μm or 100 μm. According to one embodiment, the electrical conductor track has a width of 0.05 mm to 40 mm, preferably 1 mm to 22 mm, and in particular 2 mm to 5 mm. Such a width is particularly suitable for achieving sufficient current carrying capacity in combination with the above-mentioned thickness.

[0026] Such a flexible flat ribbon cable has at its two ends connection areas (contact points) which have at least one groove of the covering film.

[0027] In another preferred embodiment of the electrical line connection according to the invention, the encapsulation has a plastic material as insulating material. The encapsulation can consist of a correspondingly strong plastic, such as polyimide (PI) or PA66 in combination with glass fibers. For example, the encapsulation can be manufactured by an injection molding method, the encapsulation being designed as a rectangular or round housing. The encapsulation preferably has essentially the shape of a disk, which includes a protrusion at the exit area of ​​the round cable. Since the edge of the encapsulation facing the flat ribbon cable has a rounding, straight bending edges can be avoided.

[0028] The cable, in particular a round cable, has a connecting element, in particular a socket or a plug, at one of its ends facing away from the encapsulation. In addition to the electrically conductive conductor (referred to as inner conductor or also referred to as inner core, cord or core), the cable can also comprise an insulating cable sheath (preferably a polymer cable sheath), which is preferably removed in each case in the end region of the cable in order to achieve an electrically conductive connection between the conductor of the (round) cable and the flat ribbon cable or the connecting element. For example, the electrically conductive conductor of the round cable can contain copper, aluminum and / or silver or alloys or mixtures thereof. The round cable has a preferably circular or oval cross-section, which is, for example, 0.3 mm 2 Up to 6mm 2 .

[0029] The invention further relates to a substrate having a functional element which comprises an electrical line connection according to the invention.

[0030] The present invention also relates to a composite sheet comprising a substrate according to the present invention. The substrate is designed as a first sheet, and the composite sheet has a second sheet and two intermediate layers between the first sheet and the second sheet. The functional element is arranged between the two intermediate layers, and the flat ribbon cable is conductively connected to the surface electrode of the functional element at one end.

[0031] The composite sheet comprises a first sheet and a second sheet, and the first sheet and the second sheet are preferably made of glass, and particularly preferably made of soda lime glass, which is common in window sheets. However, the sheet can also be made of other glass types, such as quartz glass, borosilicate glass or aluminosilicate glass, or made of hard transparent plastic, such as polycarbonate or polymethyl methacrylate. The sheet can be transparent, or it can also be tinted, or colored. If the composite sheet is used as a windshield, it should have sufficient light transmittance in the central viewing area, and according to the ECE-R43 standard, the light transmittance in the main field of view A is preferably at least 70%. The first sheet and the second sheet can also be called an outer sheet and an inner sheet.

[0032] The first pane, the second pane and / or the intermediate layer can have other suitable coatings known per se, for example an antireflection coating, an anti-stick coating, an anti-scratch coating, a photocatalytic coating or a sun protection coating or a low-e coating.

[0033] The thickness of the first and second sheets can vary greatly and can therefore be adapted to the requirements in the respective case. The first and second sheets advantageously have a standard thickness of between 0.7 mm and 25 mm, preferably between 1.4 mm and 2.5 mm for vehicle glazing, and preferably between 4 mm and 25 mm for furniture, electrical appliances and buildings, in particular for electrical heating elements. According to the invention, the dimensions of the sheets can vary greatly and depend on the size of the use according to the invention. For example, the first and second sheets have a thickness of 200 cm as is customary in the field of vehicle construction and construction. 2 Meters up to 20m 2 surface.

[0034] The functional element has electrically controllable optical properties and comprises a first carrier film, a first surface electrode, an active layer, a second surface electrode and a second carrier film arranged one on top of the other. According to one embodiment of the composite sheet according to the invention, the functional element is a so-called polymer dispersed liquid crystal (PDLC) functional element.

[0035] The active layer has variable optical properties which can be controlled by a voltage applied to the active layer. In the context of the present invention, electrically controllable optical properties are understood to mean continuously controllable properties and also those which can be switched between two or more discrete states. The optical properties are in particular related to light transmission and / or scattering behavior.

[0036] The first and second carrier films are in particular polymers or thermoplastic films. In particular, the carrier films contain or consist of a thermoplastic material. The thermoplastic material can be a thermoplastic polymer or a mixture of two or more thermoplastic polymers. In addition to the thermoplastic material, the carrier film may also contain additives, such as plasticizers. The thermoplastic material of the carrier film is preferably polyethylene terephthalate (PET), as is common in commercially available functional elements.

[0037] The thermoplastic material of the carrier film may also include or consist of a mixture of PET and other thermoplastic polymers and / or PET copolymers. For example, the thermoplastic material of the carrier film may also include or consist of PU, polypropylene, polycarbonate, polymethyl methacrylate, polyacrylate, polyvinyl chloride, polyacetic acid resin, fluorinated ethylene propylene, polyvinyl fluoride and / or ethylene tetrafluoroethylene. The thickness of each layer of the carrier film is preferably between 0.03 mm and 0.4 mm, and more preferably in the range of 0.04 mm to 0.2 mm.

[0038] The surface electrode of the functional element comprises a conductive coating on a carrier film. The side of the carrier film having the conductive coating forming the service electrode then faces the active layer.

[0039] In another advantageous embodiment, the functional element can be divided into segments by insulating wires. In particular, the insulating wires are introduced into the surface electrode so that the segments of the surface electrode are electrically insulated from each other. The individual segments can be connected to an external voltage source independently of each other via connection areas and flat conductors, so that they can be controlled individually in the operating state. Then, a segment of the functional element has two connection areas. Each connection area has a contact portion. Thus, for example, different areas of the functional element (such as a sunshade) can be switched independently.

[0040] In another preferred embodiment, the functional element is a PNLC or SPD functional element. In the case of an SPD functional element, the active layer comprises suspended particles, and the absorption of light by the active layer can be changed by applying a voltage to the surface electrodes. A polymer network liquid crystal (PNLC) functional element comprises an active layer in which a liquid crystal is embedded in a polymer network, and the operation is also similar to that in a PDLC functional element.

[0041] The surface electrodes are intended for electrical connection to an external voltage source. The contacting of the surface electrodes is preferably carried out by (ultrasonic) welding, crimping or adhesive bonding. For this purpose, an electrically conductive material, in particular a paste or a welded contact, is applied to at least one of the surface electrodes. The paste contains silver or a silver-containing alloy. The electrically conductive material is connected to the surface electrodes as a so-called busbar, for example a conductive material strip or a conductive print. The surface electrodes can be electrically contacted in each case by means of a busbar.

[0042] In an alternative embodiment of the busbar, a thin and narrow metal film strip or metal wire is used, which preferably contains copper and / or aluminum, in particular a copper film strip with a thickness of about 50 μm. The width of the copper film strip is preferably 1 mm to 10 mm. During the further processing of the functional element, the metal film strip or metal wire is applied to the surface electrode in a composite structure consisting of a thermoplastic plastic layer. In the subsequent high-pressure steaming process, a reliable electrical contact between the busbar and the coating is achieved by the action of heat and pressure. Alternatively, the electrical contact between the surface electrode and the busbar can also be produced by welding or gluing using a conductive adhesive.

[0043] The busbar is attached to the surface electrode by slotting the carrier film, the surface electrode and the active layer so that the respective other surface electrode protrudes with the associated carrier film. This can preferably be performed along the edge region of the respective side of the functional element. The busbar can then be attached to the protruding surface electrode, or the flat ribbon cable can be directly in contact with the surface electrode. On the opposite side of each functional element, another busbar is attached to the other surface electrode in a corresponding manner.

[0044] In an advantageous embodiment, the functional element is a PDLC functional element, and in particular a functional element that is capable of switching at least one region of the vitrified cell from a transparent state to an opaque state and vice versa. The active layer of the PDLC functional element comprises liquid crystals embedded in a polymer matrix. The thickness of the functional element is, for example, from 0.09 mm to 1 mm.

[0045] The invention also relates to a vehicle having an electrical line connection according to the invention.

[0046] The invention further relates to a method for producing an electrical line connection according to the invention with a cross-sectional transition region, wherein the encapsulation is produced by an injection molding method. In a first embodiment of the method according to the invention, the plastic material is placed in a mold around the cross-sectional transition region in a molten form in a liquid state, in particular a viscous liquid state. It is then connected to the flat ribbon cable and the round cable in the mold and hardened by the action of temperature and pressure. As a result, the connection between the round cable and the flat ribbon cable becomes waterproof and at the same time insulating.

[0047] Furthermore, the invention relates to the use of the electrical line connection according to the invention in a vehicle, in particular a motor vehicle, for transport on land, in the air or on water. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be explained in more detail below with the aid of drawings and examples. The drawings are schematic diagrams and are not drawn to true scale. These drawings do not limit the present invention in any way. In the following drawings:

[0049] Figure 1 is a schematic plan view of a composite sheet having a line connection portion according to the present invention;

[0050] Figure 2 is a schematic plan view of an embodiment of a line connection portion according to the present invention;

[0051] Figure 3 is a schematic cross-sectional view of a flat ribbon cable;

[0052] Figure 4 is a cross-sectional view of a circuit connection portion according to the present invention, the circuit connection portion comprising a first sealing device and a second sealing device;

[0053] FIG. 5A to FIG. 5C An embodiment of a second sealing device is shown, and

[0054] Figure 6 is a schematic side view of a line connection portion according to the present invention. DETAILED DESCRIPTION

[0055] The present invention will be illustrated in more detail below with reference to the accompanying drawings. It should be noted that different aspects are described, each of which can be used alone or in combination. In other words, any aspect can be used together with different embodiments of the present invention, unless clearly shown as a pure alternative.

[0056] Data with numerical values ​​are generally not to be understood as exact values, but also include tolerances of + / -1% to + / -10%.

[0057] Figure 1 A composite pane 100 and a substrate 101 comprising a line connection 10 according to the invention are shown. For example, the composite pane 100 and the substrate 101 are designed as a glazing unit. In this case, the composite pane 100 is designed as a roof panel of a motor vehicle.

[0058] The composite sheet 100 includes a substrate as a first sheet 101 and a second sheet 102. In the installed position, the first sheet 101 serves as an inner sheet and the second sheet 102 serves as an outer sheet. In this case, the inner sheet is a sheet facing the interior of the vehicle, while the outer sheet faces the vehicle surroundings. As is common in vehicle glazing technology, the surface of the outer sheet (second sheet 102) facing the vehicle surroundings is called surface I, and the surface of the inner sheet (first sheet 101) facing the interior of the vehicle is called surface IV. For example, the two sheets 101 and 102 are composed of soda lime glass. The two sheets 101 and 102 are firmly bonded to each other by two layers of thermoplastic interlayers 103, which are made of, for example, polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA) or polyurethane (PU).

[0059] The composite sheet 100 is also provided with an electrical functional element, which is located between the two sheets 101 and 102. For example, the electrical functional element can be a PDLC functional element, which is used, for example, as an electrically controllable sunshade or privacy cover. The PDLC functional element is composed of a commercially available PDLC multilayer film, which is embedded in the intermediate layer 103. For this purpose, for example, the intermediate layer 103 includes a total of three layers of thermoplastic film (not shown), the three layers of thermoplastic film, for example, having a thickness of 0.38 mm and made of PVB, the first thermoplastic film is connected to the first sheet 101, and the second thermoplastic film is connected to the second sheet 102, and the thermoplastic frame film between them has a cut, and the functional element cut to size is accurately inserted into the cut. In this way, the third thermoplastic film can be said to form a bracket for the functional element, and the functional element is therefore encapsulated by the thermoplastic material around and is therefore protected. The PDLC functional element generally includes an active layer between two surface electrodes and two carrier films. The active layer contains a polymer matrix with liquid crystals dispersed therein, which align themselves according to the voltage applied to the surface electrodes, thereby enabling the control of the optical properties. The surface electrodes can be electrically contacted via busbars. Electrical wiring connections are required in order to apply voltage to the busbars.

[0060] The composite pane 100 also has a flat ribbon cable 1. The busbars of the functional element are electrically conductively connected to the flat ribbon cable 1. Preferably, this connection is made secure by welding.

[0061] The functional element is a PDLC functional element which acts as a controllable sunshade or privacy screen. Depending on the position of the sun, the driver or other vehicle occupant can operate the PDLC functional element, for example, by means of a touch controller.

[0062] It is understood that the flat ribbon cable 1 can be adapted to the respective conditions in actual use and can extend, for example, over two, three or four planes. Alternatively or in combination, more or fewer conductor tracks can be arranged next to each other for each plane.

[0063] like Figure 1 As shown in the schematic inset of , the flat ribbon cable 1 is partially laminated into the composite pane 100 with its first end 1 . 4 and is guided out of the composite pane 2 between the two panes 101 , 102 .

[0064] exist Figure 1 In the embodiment, the flat ribbon cable 1 is guided around the side surface of the first sheet 101 and arranged on the surface IV of the first sheet 101. For this purpose, the first sheet 101 can have a groove in the outlet area 29, for example in the form of a sandblasted area (not shown here).

[0065] The flat ribbon cable 1 has a first connection area 1.5 and a second connection area 1.8 along the extension direction of the flat ribbon cable 1, the first connection area 1.5 being located at the first end 1.4 of the flat ribbon cable 1, and the second connection area 1.8 being located at the second end 1.7 of the flat ribbon cable 1. In the first connection area 1.5, the flat ribbon cable 1 has at least one connection electrode for electrical (e.g., current) contact of a functional element. The second connection area 1.8 is located in the encapsulation 12, into which at least one end of a cable, in particular a (round) cable 2, is inserted.

[0066] The line connection 10 according to the invention with the cross-sectional transition region 11 can be produced easily and cost-effectively and can electrically contact functional elements arranged in the composite pane 100 in a space-saving, flexible and durable manner.

[0067] Figure 2 is a plan view of another embodiment of a line connection 10 according to the invention. Four parallel line connections 10 are shown. Each electrical line connection 10 comprises a flat ribbon cable 1 having a conductor track 1.1 and a covering film 1.2 for insulating the conductor track 1.1.

[0068] Each flat ribbon cable 1 has a first connection area 1.5 and a second connection area 1.8 at two opposite ends 1.4 and 1.7 of the flat ribbon cable 1 in the extension direction. The connection areas 1.5 and 1.8 of the flat ribbon cable 1 are used to make electrical contact with the conductor track 1.1. The second connection area 1.8 is located in the packaging part 12, and one end of the round cable 2 is inserted into it.

[0069] For example, the encapsulation 12 consists of a solid plastic material, such as polyamide (PA) and / or polyimide (PI), PBT, PA611, PA12, PA6 or PA66 combined with glass fibers (up to 50%). The encapsulation 12 is used to isolate the electrical contact (e.g. welding) between the flat ribbon cable 1 and the round cable 2. The encapsulation 12 can be produced by injection molding or 3D printing, for example.

[0070] The cover film 1.2 is at least partially removed at the contact points so that the conductor tracks 1.1 can be accessed. The cover film 1.2 has recesses. This can be achieved, for example, by window technology during production or by subsequent removal of the cover film 1.2, for example by laser ablation.

[0071] The cross-sectional transition region 11 comprises an electrical connection between the conductor tracks 1 . 1 of the flat ribbon cable 1 and the conductors 2 . 1 of the round cable 2 . The cross-sectional transition region 11 comprises an encapsulation 12 .

[0072] In addition to the electrically conductive conductor 2.1, the round cable 2 comprises an insulating polymeric cable sheath 2.2 which is removed in the cable end region to enable an electrically conductive connection between the conductor 2.1 of the cable 2 and the conductor track 1.1. The electrically conductive conductor 2.1 of the cable 2 contains copper. The cable 2 has a circular or oval cross section with a cross-sectional area of, for example, 5 mm 2 .

[0073] In principle, the round cable 2 can be any connection cable known to a person skilled in the art for electrical contacting of functional elements and is suitable for connection with a connection element (also called crimping contact) by crimping or clamping. The conductor 2.1 (also called inner core or core) of the round cable 2 is stripped at one end thereof facing the flat ribbon cable 1 and rigidly connected to the conductor track 1.1 by a soldered connection 5. A connection element, such as a plug or socket 17, can be arranged at one end of the round cable 2 facing away from the flat ribbon cable 1 for further electrical connection, such as connection to an onboard electronic system.

[0074] Figure 3 is a schematic cross-sectional view of an embodiment of a flat ribbon cable 1. The conductor tracks 1.1 are evenly spaced from one another and each has a rectangular cross section. The conductor tracks 1.1 are surrounded by an insulating sheath consisting of a covering film 1.2. For this purpose, the covering film 1.2 is glued to the conductor tracks 1.1.

[0075] The flat ribbon cable 1 can include a plurality of conductor tracks 1.1. The conductor tracks 1.1 are then arranged adjacent to each other and / or one above the other. For example, the electrical conductor tracks 1.1 consist of a thin copper, silver, tin or gold film. These films can additionally be plated, for example silver-plated, gold-plated or tin-plated. The thickness of the film is, for example, 35 μm, 50 μm, 75 μm or 100 μm.

[0076] Films made of polyimide, preferably black or yellow polyimide films (eg PI-MTB / MBC), for example with a thickness of 25 μm, are particularly suitable materials for cover film 1.2. Alternatively, PEN polymer films, preferably white PEN polymer films, for example with a thickness of 25 μm, can be used.

[0077] The adhesive layer between the first cover film 1.2 and the electrical conductor track 1.1 can contain or consist of, for example, an epoxy resin adhesive or a thermoplastic adhesive. A typical thickness of the adhesive film is from 25 μm to 35 μm. The adhesive can be transparent or also pigmented, for example black.

[0078] Figure 4 An embodiment of a line connection 10 according to the invention is shown, which comprises a first sealing means 1.3 and a second sealing means 2.3. The electrical line connection 10 according to the invention comprises a cross-sectional transition region 11 from a flat ribbon cable 1 according to the invention to a round cable 2 comprising at least one electrical conductor 2.1. The flat ribbon cable 1 comprises a conductor track 1.1 and a covering film 1.2. The covering film 1.2 has a groove so that the conductor track 1.1 can come into contact with the conductor 2.1 of the round cable 2.

[0079] The cross-sectional transition region 11 comprises an electrical connection between the conductor tracks 1.1 of the flat ribbon cable 1 and the conductors 2.1 of the round cable 2. The cross-sectional transition region 11 comprises an encapsulation 12. The encapsulation 12 has a circular cross section and has a projection in the region of the exit of the round cable 2.

[0080] The first sealing device 1.3 is arranged on the flat ribbon cable 1, and the second sealing device 2.3 is arranged on the round cable 2. When the encapsulation part 12 is attached to the line connection part 10, the first sealing device 1.3 is tightly pressed against the flat ribbon cable 1, and the second sealing device 2.3 is tightly pressed against the round cable 2, thereby producing a seal around the respective cables. This arrangement of the sealing devices 1.3 and 2.3 (seals) ensures that water is prevented from penetrating into the encapsulation part 12 by capillary effect.

[0081] The first sealing device 1.3 is a double-sided adhesive tape, which is arranged on two opposite surfaces of the flat ribbon cable 1. The first sealing device 1.3 is installed around the flat ribbon cable 1. The bonding of the encapsulation part 12 to the flat ribbon cable 1 is advantageously supported by the bonding of the adhesive tape, so that the connection between the encapsulation part 12 and the flat ribbon cable 1 is very tight and stable. In particular, the adhesive tape can be an acrylic adhesive tape. Additionally, the adhesive tape can be transparent. The material thickness of the adhesive tape can have a thickness of 25μm to 2mm, preferably 100μm to 150μm, and particularly preferably 130μm.

[0082] The encapsulation 12 may completely or only partially cover the first sealing means 1 . 3 and the second sealing means 2 . 4 .

[0083] In addition to the electrically conductive conductor 2.1, the round cable 2 comprises an insulating polymer cable sheath which is removed in the cable end region to enable an electrically conductive connection between the conductor 2.1 of the round cable 2 and the conductor track 1.1. The electrically conductive conductor 2.1 of the round cable 2 contains copper. The round cable 2 has a circular cross section with a cross-sectional area of, for example, 5 mm 2 .

[0084] Figures 5A to 5C An embodiment of the second sealing device 2.3 is shown. The second sealing device 2.3 has an annular shape. In this case, the second sealing device 2.3 surrounds the round cable 2 in a flush manner, i.e. the second sealing device 2.3 is arranged around the round cable 2 ( Figure 4 ). During production, the second sealing device 2.3 can be fastened and molded onto the round cable 2. The second sealing device 2.3 can be installed on the round cable before producing the encapsulation 12. Figure 4 As shown in FIG. 2 , the second sealing means 2 . 3 is formed as a collar portion on the round cable 2 .

[0085] Figure 5A The second sealing device 2.3 shown in the figure has three sealing lips 2.4. Alternatively, the second sealing device 2.3 can have one, two or four sealing lips 2.4. The circumferential sealing lip 2.4 acts on the radially outwardly facing portion of the second sealing device 2.3. A higher water resistance of the electrical line connection can be achieved by the three sealing lips 2.4. In addition, the second sealing device 2.3 can have a partially corrugated surface on its surface facing the round cable 2. Figure 5B As shown in FIG. 1 , three sealing lips 2.4 are arranged one behind the other in the extension direction of the round cable 2 and at a certain distance from each other. The three sealing lips 2.4 have outer edges extending parallel to each other. Figure 5C is a perspective plan view of the second sealing means 2.3. The second sealing means may comprise silicone, polyvinyl chloride or a thermoplastic elastomer.

[0086] Figure 6 The line connection 10 according to the invention is shown in a cross section through the encapsulation 12. The encapsulation 12 is produced by injection molding. The encapsulation 12 is approximately disc-shaped and includes a protrusion in the exit area of ​​the round cable 2. This shape of the encapsulation 12 surrounds the first sealing device 1.3 and the second sealing device 2.3, thereby producing a high-density and durable connection. The first sealing device 1.3 and the second sealing device 2.3 make the electrical line connection 10, in particular the encapsulation area, sealed and waterproof.

[0087] Reference numerals list

[0088] 1 Flat ribbon cable

[0089] 1.1 Conductor track

[0090] 1.2 Covering film

[0091] 1.3 The first sealing device

[0092] 1.4 First end

[0093] 1.5 First connection area

[0094] 1.6 The first area of ​​the flat cable

[0095] 1.7 Second end

[0096] 1.8 Second connection area

[0097] 2 round cables

[0098] 2.1 Cable Conductor

[0099] 2.3 Second sealing device

[0100] 2.4 Sealing lip

[0101] 4 Adhesive tape

[0102] 5. Welding connection

[0103] 10 Line connection

[0104] 11 Cross-sectional transition area

[0105] 12 Packaging Department

[0106] 17 Socket or plug

[0107] 19 Protective housing

[0108] 29 Exit Point

[0109] 100 Laminated glass sheets

[0110] 101 first sheet (base)

[0111] 102 Second sheet

[0112] 103 Middle Layer

[0113] I. Second surface (outer side) of second sheet 102

[0114] IV First Surface (Inner Side) of First Sheet Material 101

Claims

1. An electrical line connection (1) having a cross-sectional transition region (11) from a flat ribbon cable (1) to a cable (2), in particular a round cable, -in, The flat ribbon cable (1) comprises at least one electrical conductor track (1.1) and a covering film (1.2) for electrically insulating the conductor track (1.1), - wherein the cable (2) comprises at least one electrical conductor (2.1), - wherein an electrical connection between the conductor track (1.1) of the flat ribbon cable (1) and the conductor (2.1) of the cable (2) is provided in the cross-sectional transition region (11); - wherein the cross-sectional transition region (11) has an encapsulation (12) for electrical insulation, and Wherein, a first sealing device (1.3) is arranged on the flat ribbon cable (1), and a second sealing device (2.3) is arranged on the cable (2), The first sealing device (1.3) is a double-sided adhesive tape (4) which is arranged on two opposite surfaces of the flat ribbon cable (1), and the second sealing device (2.3) has one or more sealing lips (2.4).

2. The electrical line connection portion (10) according to claim 1, wherein: The adhesive tape (4) is an acrylic adhesive tape.

3. The electrical line connection (10) according to any one of the preceding claims, wherein: The adhesive tape (4) is transparent.

4. The electrical line connection (10) according to any one of the preceding claims, wherein: The first sealing device (1.3) and the second sealing device (2.3) are covered by the encapsulation part (12).

5. The electrical line connection (10) according to any one of the preceding claims, wherein: The second sealing means (2.3) has an annular shape.

6. An electrical line connection (10) according to any one of the preceding claims, wherein: The second sealing means (2.3) comprises silicone, polyvinyl chloride or a thermoplastic elastomer.

7. An electrical line connection (10) according to any one of the preceding claims, wherein: The second sealing means (2.3) is formed as a collar portion on the cable (2).

8. An electrical line connection (10) according to any one of the preceding claims, wherein: The conductor tracks (1.1) of the flat ribbon cable (1) are electrically conductively connected to the conductors (2.1) of the cable (2) via a soldered connection.

9. An electrical line connection (10) according to any one of the preceding claims, wherein: The encapsulation (12) comprises a plastic material as insulating material.

10. The electrical line connection (10) according to any one of the preceding claims, wherein: The encapsulation (12) has the shape of a disk with a projection at the exit area of ​​the round cable (2).

11. A substrate (101) with a functional element comprising an electrical line connection (10) according to any one of the preceding claims.

12. A composite sheet (100) comprising the substrate (101) according to claim 11.

13. The composite sheet according to claim 12, wherein: The substrate (101) is formed as a first sheet, and the composite sheet (100) has a second sheet (102) and two intermediate layers (103) between the first sheet (101) and the second sheet (102), wherein a functional element is arranged between the two intermediate layers (103), and the flat ribbon cable (1) is conductively connected to a surface electrode of the functional element at a first end (1.4) and is arranged to be connected to a supply voltage of a vehicle via the round cable (2) with the aid of a second end (1.7).

14. A vehicle comprising an electrical line connection (10) according to any one of the preceding claims 1 to 10.

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