DE102015100384A1 - Method for connecting two line components and resulting flat conductors - Google Patents

Abstract

The present invention relates to a method (M1, M2) for connecting two line components (1, 5, 6) and a flat conductor (21) based on this method. According to the method, first and second line components (1, 5, 6) are provided (S1, S2), each comprising a conductive element (2, 7) partially covered with an insulation (3) such that the conductive one Element has a connection region (4, 9) for contacting the conductive element. A first conductive element (1, 5) is connected to a second conductive element (1, 5, 6) in first and second terminal regions (4, 9) (S3, S6). A first insulation (3) is materially connected to a second insulation (3, 8) by melting sealing plastic on the first and / or second line component (S5, S8), so that the sealing plastic (22) forms a material connection with the first and enters second insulation (3, 8) and thus seals the first and second connection region (4, 9).

Description

Technical area

The present invention relates to a method for connecting two line components as well as a flat conductor, which was produced by such a method.

State of the art

In motor vehicles harnesses are needed to provide the individual consumers with energy from the battery. Currently, battery cables are made up by the meter. Solid or stranded copper or aluminum conductors are used. These are equipped by an extrusion process with insulation, which usually consists of plastics such as PP, PVC, PUR, LSR, etc. In the fabrication process, the meter is then product-specifically formatted and the ends of the cables are contacted accordingly. Since it is difficult to branch off the cables at the side of the cables, the cable harnesses are provided with redundant cables. This causes additional costs and increases the weight of the wiring harness.

From the EP 2 133 242 A1 For example, a motor vehicle battery line is known, which consists of a plurality of flat conductor elements and is connected at their ends with flexible cables. The flat conductor elements may be positively, positively or materially connected to each other. For connections between aluminum and copper, sealing takes place by means of heat shrink tubing or by foaming or encapsulation. However, these sealing mechanisms often do not lead to a sufficient seal and are largely unsuitable as a repair solution. After attaching a heat-shrinkable tube namely the harness must be driven through an oven. This is difficult if the wiring harness is already installed in the vehicle. By contrast, relatively large apparatuses are required for foaming and overmolding, which can only be provided in workshops at disproportionately high costs.

Description of the invention

Starting from the prior art, it is an object of the present invention to provide a method for connecting two line components, which reliably seals a connection point between the conductive elements of the line components and is particularly suitable as a repair solution. Another object is to provide a flat conductor based on this method.

According to the invention, these objects are achieved by the subject matters of the independent patent claims. Embodiments of the present invention will become apparent from the subclaims, the following description and the figures.

Accordingly, the invention comprises a method for connecting two line components, after which firstly a first and second line component are provided. While the first conductive component comprises a first conductive element partially encased in a first insulation such that the first conductive element has a first terminal region for contacting the first conductive element, the second conductive component comprises a second conductive element, which in turn is partially integral with a second insulation is encased in that the second conductive element has a second connection region for contacting the second conductive element. The first conductive element is connected to the second conductive element in the first and second terminal regions. This connection can be made, for example, cohesive, positive or non-positive. Of course, these connection methods can also be combined with each other. In order to produce a cohesive connection, welding or soldering is particularly suitable. A positive connection can be made for example in the form of a puzzle connection or a dovetail connection. For a positive connection, e.g. a clamping connection or a locking connection conceivable. A combination of these connection methods can for example be such that a form-fitting dovetail connection is selected, in which subsequently a welding of the two conductive elements takes place.

After connecting the first conductive element to the second conductive element, the first insulation is materially connected to the second insulation, so that the first and second terminal region are sealed. This can be done for example by melting sealing plastic on the first and / or second line component, wherein the sealing plastic forms a material connection with the first and second insulation. The sealing plastic is thus fixed when it is spent in the first and / or second connection area or already arranged there. The sealing plastic is then melted at this location. So it is enough heat energy introduced to melt the Abdichtkunststoff. This heat energy may also be sufficient to melt the first and second insulation in their edge regions. This may mean, in particular, that the first insulation in an edge region to the first Terminal area and the second insulation is melted in an edge region to the second terminal area. The melts then combine with the liquefied sealing plastic and cool together, so that the sealing plastic enters into a reliable cohesive connection with the first and second insulation. In this way, the first and second connection area is sealed particularly reliably.

Just opposite the doctrine of EP 2 133 242 A1 results in a more reliable seal. Although heat-shrinkable tubing is heated, it only contracts and does not melt. So there is no cohesive connection with the first and second insulation. Foaming and overmoulding are characterized by the fact that the plastic is heated far away from the pipe components and then encounters a cold insulation at the pipe components. The plastic thus applied is therefore not a complete cohesive connection with the insulation, since the introduced heat energy is not sufficient to melt the insulation reliably. In the case of a repair, dirt and dust particles have generally already settled on the line components as a result of the driving operation of the motor vehicle, which in addition counteracts sealing by foaming or encapsulation.

In contrast, the solution proposed here achieves a particularly reliable seal, characterized in that the sealing plastic is melted directly to the first and / or second line component and so enters into a cohesive connection with the first and second insulation, since by the melting of the sealing plastic on the first and / or. or second line component also melt the edge regions of the first and second insulation.

Preferably, the first conductive element is welded to the second conductive element by means of a laser beam which is moved along a contact area between the first and second terminal regions. In this way, a stable connection can be made particularly easy.

In one embodiment, a depot of sealing plastic in the solid state is arranged on the first and / or second line component. This depot can be melted, for example, by means of the same laser beam, which serves to weld the first and second conductive elements so as to seal the first and second terminal regions. However, the sealing plastic does not have to be part of the first and / or second line component. It can be arranged after the production of the line components only in the solid state in the first and / or second connection area when it is needed. For example, the sealing plastic can be arranged in the first and / or second connection region by supplying a plastic wire made of the sealing plastic to the first and / or second connection region. This plastic wire may for example consist of polyolefin. The plastic wire is melted in such a way that the molten sealing plastic of the plastic wire forms a material connection with the first and second insulation. The first insulation is thus materially connected to the second insulation, so that the first and second connection area are sealed.

The melting of the plastic wire can be done for example by means of a dedicated further laser beam. Preferably, however, a residual heat of the laser beam is used, which fuses the first conductive element with the second conductive element. By means of the laser beam, the first conductive element and the second conductive element are heated in such a way that the first insulation melts in an edge region to the first connection region and the second insulation in an edge region melts to the second connection region. The plastic wire is then fed to the first and second terminal regions behind the laser beam with respect to a movement direction of the laser beam, so that the plastic wire melts by a residual heat generated by the laser beam. However, if the first and second conductive elements are not welded by means of a laser beam, but rather, for example, a positive and / or non-positive connection takes place, a residual heat of the laser beam can not be used of course. Then there is the variant, in which the plastic wire is melted by means of a dedicated laser beam.

In one embodiment, a sleeve of the sealing plastic is disposed in the first and second terminal regions. When arranging the sleeve is still in a solid state. The sleeve may in turn consist of polyolefin, for example. Preferably, the sleeve is arranged such that it partially overlaps the first and second insulation. In order to connect the first insulation with the second insulation material fit, the sleeve can be melted. The molten sealing plastic of the sleeve then enters into a cohesive connection with the first and second insulation, thereby sealing off the first and second connection regions. The melting of the sleeve can be effected, for example, by means of a heating wire arranged in the sleeve. Preferably, this heating wire runs meandering within the sleeve. Using the sleeve can be a particularly reliable seal of the first and second Connection area can be achieved, since the sleeve in the solid state, the first and second connection area preferably completely covers. By overlapping the sleeve with the first and second insulation, it is possible to ensure that the first and second insulation melt reliably in an edge region and thus make a good connection with the molten sealing plastic in a liquid state.

In the following it will be discussed how the connection areas of the line components can be provided. For this purpose, it is initially conceivable that the conductive elements are encased in an injection molding process with an insulation, with provisions being made so that the connection area remains free. Alternatively, it is possible not to make such precautions and subsequently remove the insulation where the connection area is to be created. Of course, the two approaches can also be combined with each other if several connection areas are to be produced.

Accordingly, the step of providing the first line component may comprise partially encasing the first conductive element with the first insulation by means of an injection molding process, leaving the first connection area free. The second line component can of course be provided analogously. Additionally or alternatively, the step of providing a first line component may include removing the first isolation in a portion of the first line component so as to provide the first connection area. Again, of course, the second line component can be provided analogously. This solution is particularly flexible and can be used, for example, for repairs.

The step of removing the first or second insulation may include a step of cutting into the first or second insulation in an edge region of the subregion of the first or second line component. The first or second insulation can be effected by scraping or milling off the first or second insulation in the partial region of the first or second line component. Preferably, the step of removing the first and second insulation further comprises a step of cleaning the first and second conductive elements in the first and second terminal regions, respectively. In this way, the first or second connection area can be created subsequently.

In addition, the invention comprises a flat conductor with a first and a second line component. In this case, the first line component comprises a first conductive element, which is partially covered with a first insulation in such a way that the first conductive element has a first connection region for contacting the first conductive element. Likewise, the second line component has a second conductive element that is partially encased with a second insulation such that the second conductive element includes a second connection area for contacting the second conductive element. The first and second conductive elements are interconnected in the first and second terminal regions. As has already been explained above, this connection can be formed cohesively, positively and / or non-positively. According to the invention, the first and second insulation in the first and second connection region are connected to one another in a material-locking manner by means of a sealing plastic such that the first and second connection regions are sealed. Compared to the prior art, as he, for example, in the EP 2 133 242 A1 is shown, the flat conductor according to the invention thus has the advantage that the first and second connection area are reliably sealed.

The first and / or second insulation may be made of a plastic such as plastic. Polyolefin consist. This can be arranged by injection molding around the first and / or second conductive element.

The first line component may be, for example, a flat conductor. Such one usually has a first conductive element made of a solid metal part.

The second line component can also be designed as a flat conductor, which preferably comprises a second conductive element made of a solid metal part.

However, the second line component may also be a branch. This preferably has a contacting zone which comprises a plug contact connected to the second conductive element and a housing surrounding the plug contact. In the housing is preferably a sealing element to allow a tight connection with other elements.

The first and / or second conductive element may comprise aluminum or copper. For flat conductors, aluminum is particularly suitable since it is lighter and cheaper than copper.

With the aid of several first and second line components, entire flat conductor systems can be set up that are optimized for the desired application. So it can be a long flat conductor with many branches formed.

The invention has been described with reference to a method and a flat conductor. Provided Unless otherwise specified, the features of the method can be analogously applied to the flat conductor and the characteristics of the flat conductor analogous to the method. This means, in particular, that the second line component of the method can of course be both a flat conductor and a branch line and the first and / or second insulation of the method preferably consist of polyolefin.

Short description of the figures

Further details and related advantages of embodiments of the invention will be explained below with reference to the figures. Showing:

1a and 1b a flat conductor or an embodiment of a line component;

2a and 2 B an embodiment of a branching;

3a and 3b a laser beam welding connection with the aid of a plastic wire;

3c a first embodiment of a method according to the invention;

4a and 4b a seal by means of a sleeve;

4c a second embodiment of a method according to the invention;

5a and 5b Examples of positive connections and

6 an embodiment of a flat conductor according to the invention.

Hereinafter, the same and equivalent elements unless otherwise indicated are given the same reference numerals.

In the 1a is a first embodiment of a line component 1 illustrated. This can be both a first and a second line component. The line component 1 has a conductive element 2 , so partially with isolation 3 sheathed is that the conductive element 2 a connection area 4 for contacting the conductive element 2 having.

The 1b shows a second embodiment of a line component 5 , This is different from the one in 1a illustrated first embodiment in that the line component 5 two connection areas 4 having. The connection areas 4 may already have been kept free during the injection molding process. Alternatively, it would also be possible to use these connection areas 4 to create that isolation 3 from the conductive element 2 is subsequently removed. Of course, both approaches can be combined. So it would be conceivable, the connection area 4 on the short side during the injection molding process to keep clear and the connection area 4 to be subsequently released on the long side.

In the 2a is an embodiment of a branch 6 shown in a perspective view. In the 2 B is this branch 6 to see again in a sectional view. The branch 6 has a conductive element 7 , an isolation 8th and a connection area 9 , At one of the connection area 9 opposite end is the branch 6 with a contacting zone 10 fitted. This includes one with the conductive element 7 connected plug contact 11 and a plug contact 11 surrounding housing 12 on. In the case 12 For example, a sealing element can be arranged in order to seal a plug connection with a further element, so that the least possible corrosion on the plug contact 11 can occur.

In the 3a and 3b is illustrated as a first line component 1 with a branch 6 by means of a laser beam 13 can be connected. In the 3a is the situation in a sectional view and in the 3b shown in a perspective view, wherein in 3b for simplicity, only the conductive element 7 of the branch 6 you can see. The conductive elements 2 and 7 are held together and with the help of the laser beam 13 welded. A plastic wire 14 the sealing plastic becomes the laser beam 13 tracked. The directions of movement of the laser beam 13 and the plastic wire 14 are in the 3b each indicated by an arrow. The laser beam 13 heats the first conductive element 2 and the second conductive element 7 so that the first isolation 3 in an edge region to the first connection region and the second insulation 8th melts in an edge region to the second connection area. Since the plastic wire with respect to a movement direction of the laser beam 13 behind the laser beam 13 is supplied to the first and second terminal portion, the plastic wire melts 14 through one through the laser beam 13 generated residual heat. In this way, the liquefied sealing plastic can form a material connection with the first and second insulation 3 . 8th enter and thus seal the first and second connection area.

The 3c shows an embodiment of the method M1 according to the invention for connecting two line components. In step S1, a first line component is first provided, which comprises a first conductive element which is partially covered with a first insulation such that the first conductive element has a first connection region for contacting the first conductive element. In step S2, the second line component is then provided which comprises a second conductive element which is partially covered with a second insulation such that the second conductive element has a second connection area for contacting the second conductive element. In step S3, the first conductive element and the second conductive element in the first and second terminal region are welded by means of a laser beam. As a result, the first and second conductive elements are heated in such a way that the first insulation melts in an edge region to the first connection region and the second insulation in an edge region melts to the second connection region. In step S4, a plastic wire made of the sealing resin is supplied to the first and / or second terminal portion with respect to the moving direction of the laser beam behind the laser beam. As a result, in step S5 the plastic wire melts by the residual heat of the laser beam in such a way that the molten sealing plastic of the plastic wire forms a material connection with the first and second insulation and thus seals the first and second connection regions.

The 4a and 4b illustrate how the first and second connection area using a sleeve 15 can be sealed. The 4a shows the first line component 1 and the branch 6 in a sectional view. The conductive elements 2 and 7 are already connected to each other via a welded connection, as can be seen from the weld 16 can recognize. To the weld 16 around is the sleeve 15 arranged the first and second isolation 3 . 8th partially overlapped.

The 4b illustrates the situation in a view from above. This will be good the heating wire 17 visible within the sleeve 15 meandering. About the connection elements 18 can in the heating wire 17 Electricity is fed in, leaving the sleeve 15 melts and the melted sealing plastic of the sleeve 15 a material connection with the first and second insulation 3 . 8th received. In this way, the first and second terminal area are sealed.

The 4c Based on this, illustrates a second embodiment of the method M2 according to the invention. First, in steps S1 and S2 as in the first embodiment of the method M1, the two line components are provided. In step S6, the two conductive elements are welded together by means of a laser beam. Subsequently, in step S7, the sleeve 15 made of sealing plastic such arranged in the first and second connection region that the sleeve 15 the first and second isolation partially overlaps. In step S8, the sleeve is then melted, so that the molten sealing plastic of the sleeve forms a material connection with the first and second insulation and thus seals the first and second connection region.

The 5a and 5b illustrate how two conductive elements 2 . 7 can be positively connected to each other. In the 5a is a puzzle connection 19 shown. To facilitate the sealing, the insulation extends 8th far to the male connector of the puzzle connection 19 , In the 5b is a dovetail connection 20 between two conductive elements 2 . 7 shown. Again, the isolation extends 8th far to the dovetail. The in the 5a and 5b illustrated positive connections are particularly useful when the first and second connection area using the sleeve 15 be sealed.

The 6 shows an embodiment of a flat conductor according to the invention 21 , The flat conductor comprises a first line component 5 that the in 1b corresponds shown line component. With the first line component 5 are two second line components 1 and 6 connected. The second line component 1 corresponds to the line component 1a , The second line component 6 corresponds to the branch 6 from the 2a and 2 B , The conductive elements of the line components 1 . 5 . 6 are each welded together (not visible). Your isolations 3 . 8th are each by means of a sealing plastic 22 cohesively connected to each other, so that the connection areas are sealed.

Thus, flat conductors according to the invention can be assembled freely from a plurality of line components. Some of the piping components can be manufactured in a fully automated process on standard injection molding machines. The line components can have very different shapes and lengths, resulting in a great deal of flexibility in the design of a vehicle electrical system based on this concept. In part, the assembly of the line components can be automated. Due to the possibility of retrofitting a connection area by e.g. To expose scraping, the method presented here is also suitable for the repair of on-board networks. For sealing, the joints proposed here can be used particularly easily in workshops.

The explanations made with reference to the figures are purely illustrative and not restricting to understand. Many changes can be made in the embodiments described without departing from the scope of the invention as defined by the appended claims.

LIST OF REFERENCE NUMBERS

 1

first embodiment of a line component

 2

conductive element

 3

isolation

 4

terminal area

 5

second embodiment of a line component

 6

Embodiment of a branch

 7

conductive element

 8th

isolation

 9

terminal area

10

contacting zone

11

plug contact

12

casing

13

laser beam

14

Plastic wire

15

sleeve

16

Weld

17

heating wire

18

connecting element

19

Puzzle connection

20

Dovetail joint

21

Embodiment of a flat conductor according to the invention

22

Abdichtkunststoff

M1

first embodiment of a method according to the invention

M2

second embodiment of a method according to the invention

S1

Providing a first line component

S2

Providing a second line component

S3

Welding the first conductive element to the second conductive element by means of a laser beam

S4

Feeding a plastic wire of the sealing plastic to the first and / or second terminal area

S5

Melting of the plastic wire, so that the sealing plastic of the plastic wire enters into a cohesive connection with the first and second insulation

S6

Connecting the first conductive element to the second conductive element

S7

Arranging a sleeve of the sealing plastic in the first and second connection area

S8

Melting of the sleeve, so that the molten sealing plastic of the sleeve enters into a connection with the first and second Isolationsstoffschlüssige

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2133242 A1 [0003, 0008, 0017]

Claims (19)

Method (M1, M2) for connecting two line components ( 1 . 5 . 6 ) with the steps - providing (S1) a first line component ( 1 . 5 ), which is a first conductive element ( 2 ), which thus partially with a first isolation ( 3 ) is encased in that the first conductive element ( 2 ) a first connection area ( 4 ) for contacting the first conductive element ( 2 ), - providing (S2) a second line component ( 1 . 5 . 6 ), which is a second conductive element ( 2 . 7 ), which thus partially with a second isolation ( 3 . 8th ) is encased in that the second conductive element ( 2 . 7 ) a second connection area ( 4 . 9 ) for contacting the second conductive element, - connecting (S3, S6) of the first conductive element ( 1 . 5 ) with the second conductive element ( 1 . 5 . 6 ) in the first and second terminal areas ( 4 . 9 ) and - Material connection (S5, S8) of the first insulation ( 3 ) with the second insulation ( 3 . 8th ) by melting sealing plastic ( 22 ) on the first and / or second line component, so that the sealing plastic is a material connection with the first and second insulation ( 3 . 8th ) and so the first and second connection area ( 4 . 9 ) seals. Method (M1, M2) according to the preceding claim, wherein in the step of connecting (S3, S6) of the first conductive element to the second conductive element a cohesive, in particular by means of welding or soldering, positively, in particular by means of a puzzle connection ( 19 ) or a dovetail connection ( 20 ), and / or force-locking, in particular by means of a clamping connection or latching connection, connection is generated. Method (M1, M2) according to one of the preceding claims, wherein the step of connecting (S3, S6) the first conductive element to the second conductive element welding by means of a laser beam ( 13 ) having a contact area between the first and second terminal areas ( 4 . 9 ) is moved along. Method according to one of the preceding claims, wherein at the first and / or second line component ( 1 . 5 . 6 ) a depot of sealing plastic in the solid state is arranged, which is melted to the first and second terminal area ( 4 . 9 ) seal. Method (M1, M2) according to one of the preceding claims, with the further step of arranging sealing plastic (S4, S7) in the solid state in the first and / or second connection region (FIG. 4 . 9 ). Method (M1) according to claim 5, wherein - the step of arranging sealing plastic (S4) in the solid state in the first and / or second connecting region comprises the step of feeding a plastic wire ( 14 ) of the sealing plastic, in particular of polyolefin, to the first and / or second connection region, and - the step of materially connecting (S5) the first insulation to the second insulation comprises the step of melting the plastic wire ( 14 ), so that the molten sealing plastic of the plastic wire enters into a cohesive connection with the first and second insulation and thus seals the first and second connection region comprises. Method (M1) according to claim 3 and 6, wherein the first conductive element ( 2 ) and the second conductive element ( 2 . 7 ) by the laser beam ( 13 ) are heated in such a way that the first insulation ( 3 ) in an edge region to the first connection region ( 4 ) and the second isolation ( 3 . 8th ) in an edge region to the second connection region ( 4 . 9 ) melts, and the plastic wire ( 14 ) with respect to a direction of movement of the laser beam ( 13 ) behind the laser beam ( 13 ) is supplied to the first and second terminal portions, so that the plastic wire ( 14 ) by a through the laser beam ( 13 ) generated residual heat melts.  A method according to claim 6, wherein the melting of the plastic wire is effected by means of a further laser beam. Method (M2) according to claim 5, wherein the step of arranging sealing plastic (S7) in the solid state in the first and / or second connecting region comprises the step of arranging a sleeve ( 15 ) of the sealing plastic, in particular of polyolefin, in the first and second connection region, preferably so that the sleeve has the first and second insulation ( 3 . 8th ) partially overlapped, and comprises - the step of materially connecting (S8) of the first insulation with the second insulation, the step of melting the sleeve ( 15 ), so that the molten sealing plastic of the sleeve ( 15 ) a material connection with the first and second insulation ( 3 . 8th ) and so the first and second connection area ( 4 . 9 ) seals. Method (M2) according to the preceding claim, wherein the melting of the sleeve ( 15 ) by means of a arranged in the sleeve, in particular meander-shaped, heating wire ( 17 ) is effected. Method according to one of the preceding claims, wherein the step of providing (S1) the first line component comprises the step of partially encasing the first conductive element ( 2 ) with the first isolation ( 3 ) by means of an injection molding process, such that the first connection area ( 4 ) remains free. Method according to one of claims 1 to 10, wherein the step of providing (S1) a first line component comprises the step of removing the first insulation ( 3 ) in a partial region of the first line component so as to connect the first connection region ( 4 ) to accomplish. Method according to the preceding claim, wherein the step of removing the first insulation ( 3 ) a step of scraping or abrading the first insulation ( 3 ) in the subregion of the first line component. Flat conductor ( 21 ) with - a first line component ( 1 . 5 ), which is a first conductive element ( 2 ), which thus partially with a first isolation ( 3 ) is encased in that the first conductive element ( 2 ) a first connection area ( 4 ) for contacting the first conductive element ( 2 ), - a second line component ( 1 . 5 . 6 ), which is a second conductive element ( 2 . 7 ), which thus partially with a second isolation ( 3 . 8th ) is encased in that the second conductive element ( 2 . 7 ) a second connection area ( 4 . 9 ) for contacting the second conductive element, - wherein the first and second conductive elements ( 1 . 5 . 6 ) in the first and second terminal areas ( 4 . 9 ) and - the first and second isolation ( 3 . 8th ) in the first and second terminal areas ( 4 . 9 ) are connected to one another in a material-locking manner by means of a sealing plastic in such a way that the first and second connection regions ( 4 . 9 ) are sealed. Flat conductor ( 21 ) according to claim 14, wherein the first and / or second isolation ( 3 . 8th ) consists of a plastic, in particular a polyolefin, which in particular by means of injection molding around the first and / or second conductive element ( 2 . 7 ) was arranged. Flat conductor ( 21 ) according to claim 14 or 15, wherein the first line component ( 5 ) is a flat conductor and the first conductive element ( 2 ) consists in particular of a solid metal part. Flat conductor ( 21 ) according to one of claims 14 to 16, wherein the second line component ( 1 ) is a flat conductor and the second conductive element ( 2 ) consists in particular of a solid metal part. Flat conductor ( 21 ) according to one of claims 14 to 17, wherein the second line component ( 6 ) is a branch, in particular a contacting zone ( 10 ), one with the second conductive element ( 7 ) connected plug contact ( 11 ) and a plug contact ( 11 ) surrounding housing ( 12 ). Flat conductor ( 21 ) according to one of claims 14 to 18, wherein the first and / or second conductive element ( 2 . 7 ) Aluminum or copper.

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