EP4274028A1 - Electrical connection arrangement, connection system and method for producing an electrical connection between two electrical conductors - Google Patents

Abstract

The invention relates to an electrical connection arrangement (4) for electrically and mechanically connecting a first electrical conductor (2) to a second electrical conductor (3), comprising an electrical connecting element (8) with a first end and with a second end, at which A pressing section (9) is arranged at the first end, which has at least one lateral contact surface (11) for electrically contacting an inner lateral surface (12) of a contact recess (13) of the first electrical conductor (2), and wherein at the second end there is a contact section (10 ) is arranged, which has a contact surface (14) for non-positive connection to a side surface (15) of the second electrical conductor (3). A connecting bore (16) extends at least between the contact section (10) and the pressing section (9), so that the connecting element (8) can accommodate a first fastening means (17) or itself forms a first fastening means (17) and a second fastening means (18), which can be connected to the first fastening means (17), so that the non-positive connection is established between the contact surface (14) of the contact section (10) and the side surface (15) of the second electrical conductor (3). It is envisaged that the pressing section (9) can be radially expanded by the first fastening means (17) and/or by the second fastening means (18) in order to create a non-positive connection between the at least one lateral contact surface (11) and the inner lateral surface (12). the contact recess (13) by connecting the two fastening means (17, 18) to one another.

Description

The invention relates to an electrical connection arrangement for electrically and mechanically connecting a first electrical conductor to a second electrical conductor, comprising an electrical connecting element with a pressing section arranged at a first end, which has at least one lateral contact surface for electrically contacting an inner lateral surface of a contact recess of the first electrical conductor and with a contact section arranged at a second end, which has a contact surface for non-positive connection to a side surface of the second electrical conductor.

The invention also relates to an electrical connection system, in particular an electrical connection system for high-voltage technology, and a method for producing an electrical and mechanical connection between a first electrical conductor and a second electrical conductor.

In a variety of applications it is necessary to connect two or more electrical conductors together. A rigid mechanical connection between the electrical conductors is sometimes advantageous for this, especially if the electrical conductors are also rigid components, such as busbars in high-voltage technology.

When connecting two electrical conductors, in particular rigid electrical conductors, tolerances in the spatial position (position and/or orientation) between the electrical conductors or their interfaces or sections to be connected often have to be taken into account. For example, in vehicle technology, busbars to be connected are usually attached to different components (for example a first busbar on the body of the vehicle and a second busbar on an energy storage device or electrical consumer). The tolerances, in particular the distance and alignment of the electrical conductors to one another, can therefore become comparatively large.

Special requirements are placed on the connection of electrical conductors, particularly in the high-voltage range. High-voltage connection arrangements are used in the vehicle sector, especially in electric and/or hybrid vehicles, to supply a vehicle battery with charging current or to remove the stored energy from the battery and supply it to the electric drive or other electrical consumers. The The connection arrangement must ensure perfect transmission of high currents with preferably low transfer impedance. Given the risk that component failure in an electric vehicle would result in, particularly high demands must be placed on the quality of the conductors and components of the connection arrangement. An electrical connection arrangement must sometimes withstand high mechanical loads so that the electrical connection is not unintentionally separated, for example during operation of the vehicle.

At the same time, however, it is generally also important to ensure that the connection arrangement can be installed easily, conveniently and safely.

In view of the known prior art, the object of the present invention is to provide an electrical connection arrangement which is able to compensate for a variable distance between the electrical conductors to be connected, while preferably being easy to assemble and robust in construction.

The present invention is also based on the object of providing an electrical connection system in which a variable distance between the electrical conductors to be connected can be compensated, with preferably easy assembly and robust construction of the connection arrangement involved.

It is also an object of the invention to provide a method for producing an electrical and mechanical connection between electrical conductors, with the possibility of compensating for a variable distance between the electrical conductors, and preferably being simple to implement.

The task is solved for the electrical connection arrangement with the features listed in claim 1. With regard to the electrical connection system, the task is solved by the features of claim 8 and regarding the method by claim 15.

The dependent claims and the features described below relate to advantageous embodiments and variants of the invention.

An electrical connection arrangement is provided for electrically and mechanically connecting a first electrical conductor to a second electrical conductor.

The electrical connection arrangement is preferably designed for use in high-voltage technology, in particular in vehicle technology, for example in electromobility.

The electrical connection arrangement is therefore preferably suitable for transmitting high electrical currents at high electrical voltages. The connection arrangement, in particular the connecting element mentioned below, can, for example, be used to transmit electrical currents of up to 100 amperes, up to 200 amperes, up to 300 amperes, up to 400 amperes, up to 500 amperes, up to 600 amperes, up to 2,000 Amps or more at preferably high electrical voltages (e.g. up to 500 volts, up to 600 volts, up to 700 volts, up to 800 volts, up to 900 volts, up to 1,000 volts, up to 1,100 volts, up to 1,500 volts, up to 2,000 volts or more).

The conductor cross section of the at least one electrical conductor and/or the cross-sectional extent of the connecting element can be, for example, up to 10 mm ² , preferably up to 30 mm ² , particularly preferably up to 60 mm ² , even more preferably up to 90 mm ² , for example also up to 200 mm ² or more. In particular, a conductor cross-section or a cross-sectional extent of the connecting element can be provided which is suitable for electrical energy transmission in high-voltage technology, i.e. for transmitting high electrical currents (for example 100 amperes, up to 2,000 amperes) at alternating voltages of 30 volts to 1,000 volts or more DC voltages from 60 volts to 2,000 volts or more, especially in vehicle technology.

According to the invention, the electrical connection arrangement has an electrical connection element. This connecting element comprises a pressing section arranged at a first end. The pressing section has at least one lateral contact surface for electrically contacting an inner lateral surface of a contact recess of the first electrical conductor.

The first electrical conductor and the second electrical conductor are not to be understood as components of the claimed connection arrangement. The connection arrangement, on the other hand, is designed to connect the separate electrical conductors to one another in an advantageous manner.

The pressing section can enable radial or lateral contacting within the contact recess (e.g. a through hole or a blind hole) of the first electrical conductor. On the other hand, front-side contacting of the first electrical conductor through the pressing section is generally not provided, but is optionally possible.

According to the invention, the connecting element also comprises a contact section arranged at a second end, which has a contact surface for non-positive connection to a side surface of the second electrical conductor.

Preferably, an end-side contact surface of the contact section is provided in order to non-positively contact the side surface of the second electrical conductor facing the first electrical conductor, in particular in the case of the screw connection described below between the two fastening means mentioned below. However, it can also be provided that the contact surface is a surface facing away from the end face of the second end of the connecting element in order to contact the side surface of the second electrical conductor facing away from the first electrical conductor, in particular in the case of the bolt connection described below between the both fasteners.

The contact section is particularly suitable for contacting or a direct connection to the second electrical conductor. In principle, an indirect connection is also possible, e.g. B. via a spacer that is arranged between the contact surface and the side surface of the second electrical conductor. The connection between the contact section or its contact surface and the second electrical conductor can be a purely mechanical connection, but preferably an electrical connection is also provided in addition to the mechanical connection (direct or indirect). If a purely mechanical connection is provided between the contact section and the second electrical conductor, an electrical connection between the first electrical conductor and the second electrical conductor can preferably be established via a conductive connection between the two fastening means, which in turn at least indirectly have a respective electrical connection Contact leader.

Radial or lateral contacting of the second electrical conductor through the contact section is generally not provided, but is optionally possible. In principle, the contact section can contact any surface of the second electrical conductor, in particular a side surface, but possibly also an end surface. The contacting surfaces of the contact section ("contact surface") and the second electrical conductor are preferably planar or flat, but can optionally also be curved (convex and/or concave) - in the case of a curvature preferably, but not necessarily, with the same radius of curvature for contacting as flat as possible.

In particular, a flat contact can be provided between the (front) contact surface and the corresponding side surface of the second electrical conductor.

It has been shown that a variable distance between the electrical conductors can be achieved in a particularly advantageous manner through a combination of axial contacting on the one hand (particularly frontal contacting) and radial or lateral contacting on the other hand.

Preferably, the connecting element exclusively has said two ends, i.e. the first end and the second end. It can be provided that the connecting element is a primarily elongated body which extends from its first end to its second end along a longitudinal axis or central axis. The connecting element can optionally be designed to be axially symmetrical.

It can be provided that the pressing section directly adjoins the contact section along the longitudinal axis or along the extension of the connecting element from its first end to its second end. Optionally, however, an intermediate section that axially separates the pressing section and the contact section can be provided.

According to the invention, a connecting bore extends at least between the contact section and the pressing section (preferably the connecting bore extends at least starting from the second end of the connecting element through the contact section into the pressing section and/or starting from the first end of the connecting element through the pressing section into the contact section ), so that the connecting element can accommodate a first fastening means or itself forms such a fastening means, and can accommodate a second fastening means that can be connected to the first fastening means (in particular within the connecting bore). Preferably, the fastening means can be screwed via a common threaded connection or pressed in the manner of a bolt connection.

Preferably, the first fastening means is received or receivable in the pressing section or is formed in the pressing section.

Preferably, the second fastening means can be accommodated at least in the contact section.

The connecting hole is preferably designed as a through hole which extends completely through the connecting element, i.e. from the first end to the second end. However, the connecting hole can optionally also be a blind hole that ends within the pressing section and/or the contact section, so that the first fastening means is, for example, captively accommodated within the pressing section.

As already mentioned above, the connecting element, in particular the pressing section, can also form a first fastening means itself or can be designed in one piece with the first fastening means. The pressing section can, for example, be slotted and have an internal thread on the inner casing side within the connecting bore in order to provide a connecting element in the manner of an expansion dowel.

The connecting bore can optionally have different shoulders or steps along its longitudinal extent, for example a step or step between the contact section and the pressing section, so that the first fastening means and/or the second fastening means can be supported axially. The connecting bore can preferably have a smaller cross-sectional extent or a smaller diameter within the contact section than in the pressing section - or vice versa.

In principle, the connecting hole does not have to be round, although a round connecting hole is preferred. In any case, it is also possible to design the connecting hole in any polygonal (for example triangular, square, pentagonal, hexagonal, heptagonal, octagonal, etc.), star-shaped or other shape, e.g. B. also a design as an elongated hole or elliptical recess.

It should be mentioned at this point that neither the first fastening means nor the second fastening means is necessarily to be understood as part of the claimed connection arrangement. The connecting arrangement or the connecting element can be designed to interact functionally with the fastening means.

Due to the connecting hole between the contact section and the pressing section, it is possible to connect the two fasteners to one another within the common connecting hole, in particular to screw or press them together. Due to the axial connectability of the two fastening means, an axial force component can advantageously be introduced into the connection between the electrical conductors, for example if the second fastening means is supported on the side of the second electrical conductor facing away from the first electrical conductor and the connecting element together with the first fastening means pulls in the direction of the second electrical conductor while at the same time the pressing section is spread open.

The threaded connection (internal thread and external thread) of the fastening means can preferably be a standard threaded connection, for example M2 to M10. In principle, however, the specific design of the threaded connection is not necessarily important.

According to the invention, the pressing section can be radially expanded by the first fastening means and/or by the second fastening means in order to bring about a non-positive connection between the at least one lateral contact surface and the inner circumferential surface of the contact recess by connecting the two fastening means to one another (for example screwed or pressed).

Due to the possibility of spreading the pressing section, a mechanically and electrically extremely robust and low-resistance connection can be established between the pressing section and the first electrical conductor within the contact recess. The connection can be established reliably even if the two electrical conductors are not ideally aligned with one another in their spatial position, for example if there is an axial offset or a tilt between the two electrical conductors.

By means of the pressing section and the possibility of spreading the pressing section for said non-positive connection, it is possible to produce a press connection between the electrical connecting element and the first electrical conductor within the contact recess, in the manner of a flexible press fit. The adhesion between the pressing section and the contact recess can be adjusted comfortably and precisely by a fitter, in particular by screwing the two fasteners.

Through the proposed connection arrangement, said non-positive connection can also be established between the contact surface of the contact section and the corresponding side surface of the second electrical conductor. During the mutual screwing of the two fasteners, the contact section with its front contact surface can move in the direction of the second electrical conductor due to the axial movement of the second fastener until the front contact surface and the second electrical conductor are in frictional contact with one another. This usually takes place before the pressing section is expanded.

Overall, an advantageous, axial frictional connection with the second electrical conductor and a radial frictional connection within the contact recess of the first electrical conductor can be made possible, with high tolerance compensation and easy assembly.

In an advantageous development of the invention, it can be provided that the connecting element is primarily sleeve-shaped.

Particularly in the case of a sleeve-shaped connecting element, it can be provided that the connecting bore extends completely through the connecting element.

The connecting element, in particular a sleeve-shaped connecting element, can be inserted between the electrical conductors particularly easily during assembly. For this purpose, the connecting element with its pressing section can, for example, first be inserted into the contact recess of the first electrical conductor.

A captive pre-assembly of the connection arrangement can be provided, in particular a captive pre-assembly of the connecting element, for example within a housing shell and/or a contact protection element of one of the electrical conductors, in particular the first electrical conductor.

The contact section is preferably formed from an electrically conductive material, in particular formed entirely from an electrically conductive material. Preferably, the pressing section is formed from an electrically conductive material, in particular formed entirely from an electrically conductive material. The contact section and/or the pressing section can, for example, be made of a metal, for example copper or aluminum.

In a further development of the invention it can be provided that the contact section is formed in one piece with the pressing section.

In principle, it can be advantageous if the connecting element is designed completely in one piece, but in particular it is at least advantageous to design the contact section and the pressing section in one piece. As an alternative to a one-piece design of the contact section and the pressing section, the contact section and the pressing section can be fastened to one another (force-fitting, material-fitting and/or positive-fitting).

As a rule, the connecting element consists exclusively of the contact section and the pressing section and has no further components (optionally, however, further components can be provided, in one piece or in several parts).

Optionally, the connection arrangement can have contact protection means which are made of an electrically insulating material, for example a plastic, and at least partially encase the connecting element. For example, a contact protection means can be provided which at least partially encases the contact section and/or the pressing section, if necessary together, in order to provide contact protection for one Installer or user of the connection arrangement so that no conductive components can be accidentally touched.

It can be provided that the connecting element, in particular the contact section and/or the pressing section, have a coating in order to specifically influence the electrical and mechanical properties of the connecting element, most preferably in the area of an electrical and mechanical contact or contact surface, such as lateral contact surface of the pressing section or the contact surface of the contact section. Through the coating, the coefficient of static friction, the electrical conductivity and/or the thermal conductivity can be improved or adjusted during the connection.

According to a further development of the invention, it can be provided that the connecting element has a mechanical interface for a rotation-proof mechanical connection to at least one of the electrical conductors.

Preferably, the contact section of the connecting element has the mechanical interface. The pressing section or another component of the connecting element can also optionally have the mechanical interface. The mechanical interface can also be formed between the contact section and the pressing section, sometimes also together on the contact section and the pressing section.

Several mechanical interfaces can also be provided, for example a first mechanical interface for a rotation-proof connection to the first electrical conductor and a second mechanical interface for a rotation-proof connection to the second electrical conductor.

The mechanical interface can in particular be an axial section along the longitudinal axis or between the two ends of the connecting element, which has a polygonal cross section. The outer lateral surface of the connecting element in the area of the mechanical interface can therefore, for example, have a triangular, square, pentagonal, hexagonal, heptagonal, octagonal or other cross-sectional profile.

As an alternative to a polygonal cross-sectional profile, a star-shaped profile or a rib-groove mechanism can also be provided, for example, in order to enable a rotation-proof connection. In principle, any form-fitting and/or cohesive connection (e.g. adhesive bonding), possibly even a non-positive connection, can be used between the Connecting element and at least one of the electrical conductors may be provided in order to provide a rotation-proof connection.

In particular, if the mechanical connection between the two conductors is established by screwing the first fastening means to the second fastening means, a rotation-proof arrangement of the connecting element between the electrical conductors can be advantageous in order to simplify assembly. Alternatively or in addition to a rotation-proof connection with at least one of the electrical conductors, the mechanical interface can in principle also be designed to be connected in a rotation-proof manner with a tool, for example a wrench, so that the fitter can manually fix the connecting element while making the screw connection who produces fasteners. A torsion-proof connection can also be completely dispensed with, for example if the fastening means are to be pressed together (e.g. if the second fastening means is designed as a bolt and the first fastening means is designed as a receptacle for the bolt).

The anti-twist connection with the at least one electrical conductor can take place directly through interaction of the mechanical interface with a corresponding mechanical counter-interface of the respective electrical conductor. However, the anti-twist connection can (usually preferably) also be carried out indirectly through the interaction of the mechanical interface with a corresponding mechanical counter-interface of a housing shell of the respective electrical conductor, which in turn is mechanically connected to the electrical conductor in a anti-twist manner.

In an advantageous development of the invention it can be provided that the pressing section is designed to accommodate the first fastening means in a rotationally secure manner.

The pressing section can preferably have a suitable internal geometry within the connecting bore, which can be connected in a rotation-proof manner to a corresponding external geometry of the first fastening means. Said external geometry of the first fastening means is preferably arranged on the end region of the first fastening means facing the second electrical conductor (if the first fastening means is mounted in the pressing section).

Because the first fastening means can be accommodated in the pressing section in a rotation-proof manner, the screwing with the second fastening means can be carried out even more easily, in particular (but not exclusively) if the connecting element also has the above-mentioned mechanical interface for the rotation-proof mechanical Has connection to at least one of the electrical conductors. Finally, the connection arrangement can be mounted particularly conveniently by the fitter introducing a torque or a rotation into one of the fastening means (in particular into the second fastening means) without having to take any further measures. In particular, the need to attach an additional tool for counter-holding when screwing can be eliminated.

To increase the static friction between the first fastening means and the pressing section, the first fastening means and/or the pressing section can have a suitable coating and/or structuring of the surface (e.g. corrugation). A corresponding coating and/or surface structuring can also be provided, for example, in the connection between the lateral contact surface of the pressing section and the inner lateral surface of the contact recess of the first electrical conductor and/or in the connection between the side surface of the second electrical conductor and the contact surface of the contact section.

Optionally, it can be provided that the pressing section is designed to accommodate the fastening means in a captivity manner. For this purpose, the pressing section can have, for example, a locking hook at its free end.

In an advantageous development of the invention, it can be provided that the pressing section is slotted in the longitudinal direction in order to form the at least one lateral contact surface between two longitudinal slots.

Preferably, several lateral contact surfaces are formed in this way, in particular in the manner of spring tabs of a spring basket.

The at least one lateral contact surface or spring tab preferably has a movable, free end which corresponds to the first end of the connecting element.

However, the at least one lateral contact surface or spring tab can also be connected on both sides, i.e. have no free end. In this case, it can be particularly advantageous to arrange or design the first fastening means between the first end of the connecting element and the at least one spring tab (i.e. "below" the spring tabs), so that a screw connection with the second fastening means is carried out in the direction of the second Fastening means directed axial force causes or increases a radial bulging of the spring tabs.

Due to the longitudinal slot of the pressing section, it is possible to deflect the at least one lateral contact surface non-destructively radially by means of the first fastening means in order to thereby bring about the non-positive connection within the contact recess.

However, as an alternative to longitudinal slitting, any other measures can be provided which also enable radial expansion of the pressing section, in particular non-destructive radial expansion. If necessary, a permanent deformation of the pressing section can even be provided by screwing or pressing the two fasteners in order to bring about the non-positive connection within the contact recess.

According to a further development of the invention, it can be provided that the at least one lateral contact surface has a convex curvature.

Due to the convex curvature of the at least one lateral contact surface, it is possible to compensate for an offset between the two electrical conductors transversely to the connection direction or to the extension of the connecting element or a tilting of the electrical conductors relative to one another, since the connecting element then tilts within the contact recess without loss of contact can. In this way, a type of ball bearing can be provided for the connection between the pressing section and the contact recess. For example, an angular arrangement between the two electrical conductors of up to 5° or more can be bridged by the convex curvature.

It can be provided that the contact recess of the first electrical conductor is axially extended if the thickness of the first electrical conductor is not sufficient for a non-positive, tolerance-compensating connection with the pressing section. For this purpose, a sleeve-shaped body can optionally be placed on the electrical conductor (in one piece or as a separate component) in order to lengthen the contact recess accordingly.

The invention also relates to an electrical connection system, in particular an electrical connection system for high-voltage technology, having an electrical connection arrangement according to the above and following statements, as well as the first fastening means.

The first fastening means is preferably accommodated in the pressing section within the connecting bore, in particular captured captively.

In an advantageous development of the invention, it can be provided that, in order to cause the pressing section to expand as a result of the screwing of the two fastening means, the first fastening means tapers on the outer casing side in the direction of the second end of the connecting element.

Alternatively or additionally, it can be provided that, in order to cause the pressing section to expand as a result of the screwing of the two fastening means, the pressing section tapers on the inner casing side, within the connecting bore, in the direction of the second end of the connecting element.

Due to the inclined surface, an axial movement of the first fastening means can result in radial expansion when screwing it to the second fastening means.

A particularly good effect of spreading or redirecting force results when both connection partners taper accordingly, preferably with the same taper gradient. In principle, however, it can be sufficient if only one of the two connection partners (first fastening means or pressing section) tapers accordingly.

Due to the described taper of the first fastening means and/or the pressing section, it is possible to expand the pressing section radially by screwing the first fastening means to the second fastening means using technically particularly simple means, while the first fastening means penetrates deeper into the pressing section. During the translation of the pressing section in the direction of the second electrical conductor, the pressing section or its at least one lateral contact surface is pressed radially outwards against the inner lateral surface of the contact recess.

The corresponding contact area between the first fastening means and the pressing section is preferably conically shaped; A conical taper is therefore preferably provided. In principle, however, any taper or any concave/convex contact area can be provided.

A taper is also not absolutely necessary to cause the spreading. For example, knobs, bulbous or other elevations, etc. can also be provided distributed along the circumference of the first fastening means, which only come into contact with the inner lateral surface of the contact recess when the first fastening means penetrates further into the pressing section through the screw connection, so that then press the elevations against the inner surface and cause the expansion. In particular, the elevations must be along the perimeter of the first Fastening means must not be arranged completely all around; For example, a plurality of mutually delimited elevations distributed at points or in sections along the circumference of the first fastening means can be provided.

In an advantageous development of the invention it can be provided that the first fastening means has an internal thread to form the threaded connection with the second fastening means. The first fastening means preferably has a screw nut or is designed as a screw nut.

In particular, a first fastening means designed as a screw nut has proven to be particularly suitable. However, any sleeve-shaped first fastening means can be suitable, in particular a sleeve-shaped fastening means with an internal thread. Alternatively, a shaft-shaped first fastening means can also be provided, for example a screw element with an external thread or a bolt without an external thread.

As already mentioned, a press fit or press connection can also be provided between the fastening means. A threaded connection is therefore not absolutely necessary. The first fastening means can then in particular have a precisely fitting receptacle for a bolt or a bolt shaft or an elongated second fastening means. Optionally, the first fastening means can have a taper within the connecting bore, in particular in the contact section or at least in the region of the contact section, so that the connecting element is radially expanded at its first end or at the pressing section by inserting the second fastening means into the connecting bore.

The invention also relates to an electrical connection system, in particular an electrical connection system for high-voltage technology, having an electrical connection arrangement according to the above and following statements, and having the second fastening means.

The second fastening means is preferably accommodated at least in sections in the contact section within the connecting bore.

Preferably, the electrical connection system has the first fastening means and the second fastening means. In principle, however, the electrical connection system can also have only the first fastening means or only the second fastening means.

It can be provided that the second electrical conductor has a fastening recess. The fastening recess is preferably a through hole and is designed to accommodate the second fastening means or the second fastening means can be passed through the fastening recess.

Preferably, in the assembled state of the connection system, the fastening recess, the connecting bore and the contact recess are arranged in alignment with one another, preferably coaxially.

In a further development of the invention it can be provided that the second fastening means has a screw element, preferably a conventional metal screw.

The screw element can have a screw shaft which can be passed through the fastening recess of the second electrical conductor and which extends at least in sections through the connecting bore, the screw shaft having an external thread to form the threaded connection with the first fastening means.

The screw element can have a screw head that is supported directly (e.g. by a sufficiently large contact flange with a larger cross-sectional extent than the fastening recess) or indirectly (e.g. by a separate contact flange, such as a washer) on the electrical conductor.

Instead of a screw element that is passed through a fastening recess of the second electrical conductor, the second fastening means can optionally also rise in one piece from a side surface of the second electrical conductor or be correspondingly connected to the second electrical conductor, so that the second fastening means extends transversely as a shaft , preferably orthogonally, extends to the corresponding side surface of the second electrical conductor. However, the design of the second fastening means as a screw element is preferred.

The second fastening means can also be designed as a bolt and therefore does not necessarily have to have an external thread. In this case, the first fastening means can advantageously be designed to accommodate the bolt in a non-positive, precise manner. In this way, a press connection can be established between the fasteners.

It should be mentioned at this point that features that relate to the first fastening means can be interchangeable with the second fastening means - and vice versa. The fasteners themselves can also be arranged interchangeably. For example, for A screw element can be provided for connection to the first electrical conductor and a screw nut to the second electrical conductor.

The invention also relates to an electrical connection system, in particular an electrical connection system for high-voltage technology, having an electrical connection arrangement according to the above and following statements, and having the first electrical conductor and the second electrical conductor.

The electrical connection system preferably has the first fastening means and the two electrical conductors, particularly preferably the first fastening means and the second fastening means and the two electrical conductors.

It can be provided that the electrical conductors are designed as rigid electrical conductors, for example as busbars. In principle, however, the electrical conductors can be any electrical conductors, for example also flexible electrical conductors (e.g. single-wire conductors or stranded wires), which are optionally compacted in a plate shape on a section provided for connection to the other electrical conductor , for example by a cold welding process.

At least one of the electrical conductors can be attached or attachable to an independent component, for example to a body component of a vehicle. Alternatively or additionally, it can also be provided that at least one of the electrical conductors is attached or can be attached to an electrical consumer or high-voltage storage device.

In an advantageous development of the invention, it can be provided that the fastening recess of the second electrical conductor, through which the second fastening means is passed or can be passed, has a larger cross-sectional extent to compensate for mechanical tolerances than the section of the second fastening means running through the fastening recess.

The fastening recess can optionally also have a larger cross-sectional extent than the contact recess of the second electrical conductor.

An oversized fastening recess allows tolerances in the spatial orientation of the two electrical conductors to be evened out even better. For example, the fastening recess can also be designed as an elliptical recess or as an elongated hole.

In the case of an "oversized" fastening recess, it can be provided in particular that the second fastening means has a correspondingly large contact flange for support, such as an "oversized" screw or bolt head or a washer, with a larger cross-sectional extent than the fastening recess.

It can be provided that the electrical connection system has further electrical conductors in addition to the first electrical conductor and the second electrical conductor. For example, a third electrical conductor and a fourth electrical conductor can be provided, which can be electrically and mechanically connected to one another by means of a further connection arrangement. In this way, any number of conductor pairs can be formed.

In particular, as part of the connection system according to the invention, several busbars, which are combined in a common assembly on the high-voltage storage side and are optionally connected to one another via fuses, relays or other electrical components and assemblies, can be further connected via a corresponding connection arrangement to busbars, which are part of a common connection panel for supplying individual ones represent consumers.

It can be provided that the electrical connection system also has one or more module connectors, each of which has one or more further electrical conductors and is connected to the respective end users and the first electrical conductor or the second electrical conductor.

In principle, it can be provided that the electrical connection system has a plurality of connecting elements for connecting the two electrical conductors or also has further electrical conductors which form a common pair of conductors and are each connected to one another by means of a connecting element.

In particular, a multi-pole electrical connection consisting of at least two pairs of conductors (a first pair of conductors consisting of the first electrical conductor and the second electrical conductor and a second pair of conductors consisting of a third electrical conductor and a fourth electrical conductor) can be provided, in particular to provide a connection option for a complete circuit to provide.

• Anordnen eines elektrischen Verbindungselements mit einem an einem ersten Ende angeordneten Pressabschnitt, einem an einem zweiten Ende angeordneten Anlageabschnitt und einer Verbindungsbohrung, die sich zumindest zwischen dem Anlageabschnitt und dem Pressabschnitt erstreckt, zwischen den elektrischen Leitern;
• Einbringen eines ersten Befestigungsmittels in die Verbindungsbohrung (vorzugsweise innerhalb des Pressabschnitts) oder gestalten des Verbindungselements (vorzugsweise des Pressabschnitts) derart, so dass dieses selbst ein erstes Befestigungsmittel ausbildet;
• Einbringen eines zweiten Befestigungsmittels in die Verbindungsbohrung (vorzugsweise zumindest innerhalb des Anlageabschnitts); und
• Verbinden der beiden Befestigungsmittel, so dass das erste Befestigungsmittel oder das zweite Befestigungsmittel den Pressabschnitt radial aufspreizt, um eine kraftschlüssige Verbindung zwischen zumindest einer seitlichen Kontaktfläche des Pressabschnitts und einer Innenmantelfläche einer Kontaktausnehmung des ersten elektrischen Leiters zu bewirken.

The invention also relates to a method for producing an electrical and mechanical connection between a first electrical conductor and a second electrical conductor, comprising at least the following method steps:

• Arranging an electrical connection element with a pressing section arranged at a first end, a contact section arranged at a second end and a connection bore extending at least between the contact section and the pressing section between the electrical conductors;
• Introducing a first fastening means into the connecting bore (preferably within the pressing section) or designing the connecting element (preferably the pressing section) in such a way that it itself forms a first fastening means;
• introducing a second fastener into the connecting bore (preferably at least within the contact section); and
• Connecting the two fastening means, so that the first fastening means or the second fastening means radially spreads the pressing section in order to effect a non-positive connection between at least one lateral contact surface of the pressing section and an inner lateral surface of a contact recess of the first electrical conductor.

Preferably, it is also provided that by connecting the fastening means, a contact surface of the contact section comes into contact with a side surface of the second electrical conductor in the axial direction (in particular non-positively), preferably before the pressing section is spread open.

In an advantageous manner, an electrically conductive, flexible compensation unit can be provided for connecting, in particular, rigid electrical conductors. The compensation unit or the connection arrangement is extremely easy to assemble and extremely robust to use.

The electrical connection arrangement can be arranged between the two electrical conductors, in particular busbars, wherein both electrical conductors or busbars can preferably have respective recesses or bores (contact recess and fastening recess). Due to the connecting force (in particular screwing force or pressing force) between the two fastening means, on the one hand, the contact surface can be brought into contact with the side surface of the second electrical conductor and non-positively fixed in the axial direction and at the same time the pressing section can be spread radially in order to close in the contact recess of the first electrical conductor jam.

According to the invention, stable, low-resistance current transmission can be provided even in different tolerance positions of the electrical conductors. The attachment or fixation can be made possible in an advantageous manner with a three-part system consisting of a connecting element, a first fastening means and a second fastening means.

The electrical conductor can be part of a connection panel (consumer side and/or supply side). Preferably, an electrical or mechanical connection between two busbars of a high-voltage system can be provided in the manner described above. For example, a high-voltage storage device, for example a vehicle battery, can be produced via a first busbar with a second busbar for supplying at least one electrical consumer (for example the main unit in the traction path or an auxiliary unit in the auxiliary unit path).

Features that have been described in connection with one of the objects of the invention, namely given by the electrical connection arrangement according to the invention, the electrical connection system according to the invention and the method according to the invention, can also be advantageously implemented for the other objects of the invention. Likewise, advantages that were mentioned in connection with one of the objects of the invention can also be understood in relation to the other objects of the invention.

In addition, it should be noted that terms such as “comprising”, “having” or “with” do not exclude other features or steps. Furthermore, terms such as "a" or "the", which indicate a singular number of steps or features, do not exclude a plurality of features or steps - and vice versa.

In a puristic embodiment of the invention, however, it can also be provided that the features introduced in the invention with the terms “comprising”, “having” or “with” are listed exhaustively. Accordingly, one or more lists of features may be considered complete within the scope of the invention, for example considered for each claim. The invention can, for example, consist exclusively of the features mentioned in claim 1.

It should be mentioned that terms such as "first" or "second" etc. are used primarily for reasons of distinguishing between respective device or method features and are not necessarily intended to indicate that features are mutually dependent or related to one another.

Furthermore, it should be emphasized that the values and parameters described herein include deviations or fluctuations of ±10% or less, preferably ±5% or less, more preferably ±1% or less, and most preferably ±0.1% or less of each Include the named value or parameter, provided that these deviations are not excluded when implementing the invention in practice. The specification of ranges through initial and final values also includes all those values and fractions that are included in the respectively named range, in particular the initial and final values and a respective mean value.

Exemplary embodiments of the invention are described in more detail below with reference to the drawings.

The figures each show preferred exemplary embodiments in which individual features of the present invention are shown in combination with one another. Features of one exemplary embodiment can also be implemented separately from the other features of the same exemplary embodiment and can accordingly be easily combined by a person skilled in the art to form further sensible combinations and sub-combinations with features of other exemplary embodiments.

In the figures, functionally identical elements are provided with the same reference numbers.

Figur 1

ein Verbindungssystem in einem nicht verbundenen Zustand gemäß einem Ausführungsbeispiel der Erfindung in einer seitlichen Schnittdarstellung;

Figur 2

das Verbindungssystem der Figur 1 in einem vormontierten Zustand in einer seitlichen Schnittdarstellung;

Figur 3

das Verbindungssystem der Figur 1 in einem teilmontierten Zustand in einer seitlichen Schnittdarstellung;

Figur 4

das Verbindungssystem der Figur 1 in vollständig montiertem Zustand in einer seitlichen Schnittdarstellung;

Figur 5

ein erfindungsgemäßes Verbindungselement und ein korrespondierendes, erstes Befestigungsmittel in einer perspektivischen Ansicht;

Figur 6

das Verbindungselement der Figur 5 in einer weiteren perspektivischen Ansicht;

Figur 7

ein Verbindungssystem in vollständig montiertem Zustand mit einer Gehäuseschale für den ersten elektrischen Leiter in einer seitlichen Schnittdarstellung;

Figur 8

eine perspektivische Einzeldarstellung der Gehäuseschale und des Verbindungselements des Verbindungssystems der Figur 7;

Figur 9

ein Verbindungssystem in vollständig montiertem Zustand gemäß einem weiteren Ausführungsbeispiel der Erfindung in einer seitlichen Schnittdarstellung;

Figur 10

ein mit dem ersten Befestigungsmittel einteiliges Verbindungselement gemäß einem weiteren Ausführungsbeispiel der Erfindung in einer perspektivischen Darstellung;

Figur 11

eine Verdrehsicherung zwischen einem einteiligen Verbindungselement und dem ersten elektrischen Leiter in einer perspektivischen Darstellung;

Figur 12

ein Verbindungssystem mit dem Verbindungselement gemäß Figur 10 in einem vollständig montierten Zustand in einer seitlichen Schnittdarstellung:

Figur 13

ein mit dem ersten Befestigungsmittel einteiliges Verbindungselement und ein als Bolzen ausgebildetes zweites Befestigungsmittel gemäß einem weiteren Ausführungsbeispiel der Erfindung in einer perspektivischen Darstellung;

Figur 14

ein Verbindungssystem mit dem Verbindungselement gemäß Figur 13 in einem teilmontierten Zustand in einer seitlichen Schnittdarstellung; und

Figur 15

das Verbindungssystem gemäß Figur 14 in einem vollständig montierten Zustand in einer seitlichen Schnittdarstellung.

It shows schematically:

Figure 1

a connection system in a non-connected state according to an exemplary embodiment of the invention in a side sectional view;

Figure 2

the connection system of the Figure 1 in a pre-assembled state in a side sectional view;

Figure 3

the connection system of the Figure 1 in a partially assembled state in a side sectional view;

Figure 4

the connection system of the Figure 1 in a fully assembled state in a side sectional view;

Figure 5

a connecting element according to the invention and a corresponding, first fastening means in a perspective view;

Figure 6

the connecting element Figure 5 in another perspective view;

Figure 7

a connection system in a fully assembled state with a housing shell for the first electrical conductor in a side sectional view;

Figure 8

a perspective individual view of the housing shell and the connecting element of the connection system Figure 7 ;

Figure 9

a connection system in a fully assembled state according to a further exemplary embodiment of the invention in a side sectional view;

Figure 10

a connecting element which is one piece with the first fastening means according to a further exemplary embodiment of the invention in a perspective view;

Figure 11

an anti-rotation device between a one-piece connecting element and the first electrical conductor in a perspective view;

Figure 12

a connection system with the connecting element according to Figure 10 in a fully assembled state in a side sectional view:

Figure 13

a connecting element integral with the first fastening means and a second fastening means designed as a bolt according to a further exemplary embodiment of the invention in a perspective view;

Figure 14

a connection system with the connecting element according to Figure 13 in a partially assembled state in a side sectional view; and

Figure 15

the connection system according to Figure 14 in a fully assembled state in a side sectional view.

In the Figures 1 to 4 an electrical connection system 1 according to a first exemplary embodiment of the invention is shown in various states in a side sectional view.

The electrical connection system 1 has a first electrical conductor 2 and a second electrical conductor 3, which in the exemplary embodiment are each designed as busbars and can be connected by means of an electrical connection arrangement 4 according to the invention. In Figure 1 a not yet connected state of the connection system 1 is shown.

The first electrical conductor 2 can be, for example, a connection panel or the first electrical conductor 2 can be part of a connection panel that is connected via one or more electrical outlets 5 to one or more electrical consumers, for example to a main or Ancillary unit of an electric vehicle. The second electrical conductor 3 can, for example, be a busbar in the load or charging path connected to a high-voltage storage device 6, which can be directly or indirectly (for example via an electrical assembly) in Figure 1 is indicated as a black box 7 and is connected to the high-voltage storage unit 6.

The connection arrangement 4 has an electrical connection element 8 with a pressing section 9 arranged at a first end and a contact section 10 arranged at a second end. The connecting element 8 is primarily sleeve-shaped and extends along a longitudinal axis L from its first end to its second end. In the exemplary embodiment, the contact section 10 and the pressing section 9 are formed in one piece.

The pressing section 9 has at least one lateral contact surface 11 for electrically contacting an inner lateral surface 12 of a contact recess 13 of the first electrical conductor 2. In order to form the at least one lateral contact surface 11, the pressing section 9 is preferably slotted in the longitudinal direction, with a lateral contact surface 11 being formed between two longitudinal slots in the manner of a spring tab of a spring basket. In the exemplary embodiment, four lateral contact surfaces 11 or spring tabs are specifically provided, as can be seen particularly well from the perspective view of the connecting element 8 in the Figures 5 and 6 can be recognized.

The contact section 10 of the connecting element 8 has a frontal contact surface 14 for non-positive, electrical contacting of a side surface 15 of the second electrical conductor 3. In particular, flat contacting can be provided.

A connecting bore 16 extends through the connecting element 8 from the second end through the contact section 10 into the pressing section 9. In the exemplary embodiment, the connecting bore 16 extends completely through the entire connecting element 8. Due to the connecting bore 16, the pressing section 9 can accommodate a first fastening means 17 and the contact section 10 can accommodate a second fastening means 18. The two fastening means 17, 18 can be screwed together via a common threaded connection. By way of example, the first fastening means 17 in the exemplary embodiment is designed as a screw nut which has an internal thread to form the common threaded connection with the second fastening means 18.

Again, by way of example, the second fastening means 18 is designed as a screw element, with a screw shaft 19 which can be passed through a fastening recess 20 of the second electrical conductor 3 and which extends at least in sections through the connecting bore 16 and an external thread to form the threaded connection with the first fastening means 17 having.

In Figure 2 a pre-assembled state of the electrical connection system 1 or the electrical connection arrangement 4 is shown. In the pre-assembled state shown, the connection arrangement 4 is captively connected to the second electrical conductor 3 in that the first fastening means 17 and the second fastening means 18 are already partially screwed together.

In order to simplify the screwing process for the fitter, it can be provided that the pressing section 9 is designed to accommodate the first fastening means 17 in a rotation-proof manner. For this purpose, pressing section 9 on the inside and first fastening means 17 on the outside can have, for example, a polygonal cross-sectional shape, which is particularly evident when viewed together Figures 5 and 6 can be clearly seen.

A partially assembled state of the electrical connection system 1 is in Figure 3 shown. The two fastening means 17, 18 were further screwed together, so that the first fastening means 17 moves further along the longitudinal axis L of the connecting element 8 in the direction of the second end of the connecting element 8. In this way, the connecting element 8 can first be pressed axially with the front contact surface 14 of the contact section 10 against the corresponding side surface 15 of the second electrical conductor 3 and thereby a corresponding non-positive mechanical and electrically stable connection can be established with the second electrical conductor 3. For this purpose, the second fastening means 18 or the screw element has a screw head 21, which is supported on the second electrical conductor 3, for example by the contact flange 22 shown, which is in one piece with the screw head 21 in the exemplary embodiment. Alternatively, however, indirect support can also be provided, for example via a washer.

To compensate for tolerances, the fastening recess 20 is designed to be oversized compared to the screw shaft 19, as shown in FIG Figures 1 to 4 good to see. As an alternative to an oversized hole, an elongated hole or an elliptical fastening recess 20 can also be provided, for example.

Figure 4 finally shows a fully assembled state of the electrical connection system 1. For this purpose, the two fastening means 17, 18 were further screwed together, which ultimately leads to a radial expansion of the pressing section 9 due to the axial movement of the first fastening means 17 in the direction of the second end of the connecting element 8 , whereby a non-positive connection between the side contact surfaces 11 and the inner surface 12 of the contact recess 13 is brought about, as shown in FIG Figure 4 indicated by the arrows shown.

In order to achieve a non-destructive, releasable expansion, the already mentioned longitudinal slots between the lateral contact surfaces 11 are advantageous, which can give the pressing section 9 a certain elasticity. In order to effect the expansion based on the axial movement of the first fastening means 17, the pressing section 9 has surface sections 23, 23' which taper towards the second end of the connecting element 8 on the inner casing side, i.e. within the connecting bore 16, and the first fastening means 17 on the outer casing side, each in the direction of the second end of the connecting element 8. The tapering surface sections 23, 23' preferably have the same pitch, but can also differ in their pitch and design. In principle, it can also be sufficient if only one of the two connection partners consisting of the first fastening means 17 and the pressing section 9 has a correspondingly tapering surface section 23, 23 '.

In particular, the combination of axial connection to the second electrical conductor 3 and radial connection to the first electrical conductor 2 can result in a particularly advantageous electrical connection arrangement 4. If the depth of the contact recess 13 should not be sufficient for a stable mechanical connection with suitable tolerance compensation, a sleeve-shaped body 24 can be placed on the first electrical conductor 2, which extends the contact recess 13 accordingly (in Figure 4 shown in dashed lines).

To compensate for tolerances, it can be advantageous if the lateral contact surfaces 11 have a convex curvature, as indicated in the exemplary embodiment. The connecting element 8 is therefore able to establish a mechanically and electrically stable connection with the first electrical conductor 2 even if the connecting element 8 tilts within the contact recess 13, for example to compensate for a relative rotation of the electrical conductors 2, 3.

In the Figures 7 and 8th a further connection system 1 according to the present invention is shown in a fully assembled state in order to illustrate a further, optional optimization of the mountability of the connection system 1.

Sometimes the electrical conductors 2, 3, in particular the electrical conductors 2, 3 of a high-voltage system, are provided with one or more housing shells 25 for contact protection or other reasons, for example as in the Figures 7 and 8th indicated. By means of the housing shells 25, on the one hand, a captive device for the connecting element 8 (possibly including the first fastening means 17) and also a further anti-twist device can be provided. It can therefore be provided, for example, that the connecting element 8, in particular the contact section 10 of the connecting element 8, has a mechanical interface 26 (see also the Figures 5 and 6 ) for a rotation-proof mechanical connection to the first electrical conductor 2 or the second electrical conductor 3. In Figure 7 a rotation-proof connection with the first electrical conductor 2 is indicated indirectly via the housing shell 25. The mechanical interface 26 has, as can be seen from Figure 8 shows a polygonal cross section.

The exemplary embodiments and variants of the invention described above are only to be understood as examples. In principle, the combination of axial and radial connection in a connection system 1 according to the invention can be implemented in many other ways, which will be clarified by way of example using the following figures.

In Figure 9 the second fastening means 18 is not designed as a screw element, but rather as a purely shaft-shaped body which, starting from the second electrical conductor 3, extends transversely or orthogonally from the side surface 15 intended for connection and produces the threaded connection with the first fastening means 17. The drive for the screw connection can be produced, for example, via the first fastening means 17 or by rotating the connecting element 8 together with the first fastening means 17 (for example via a rotation-proof mechanical interface 26 in the area of the contact section 10, comparable to the mechanical interface 26 in the Figures 7 and 8th ) can be made possible.

Based on Figures 10 to 12 A variant of the invention is intended to be illustrated, in which the connecting element 8 is formed in one piece with the first fastening means 17, in the manner of an expansion dowel.

As before, the connecting element 8 has a pressing section 9 at a first end and a contact section 10 at its second end. In the assembled state, the connecting element 8 can be non-positively supported with its front contact surface 14 on the side surface 15 of the second electrical conductor 3 facing the first electrical conductor 2 (cf. Figure 12 ). The side contact surfaces 11 of the pressing section 9 also serve for a non-positive connection to the inner surface 12 of the contact recess 13 (see also Figure 12 ). The connecting bore 16 extends completely through the connecting element 8, so that the second fastening means 18 can be passed through starting from the second end of the connecting element 8 to the first end of the connecting element 8.

Starting from the first end of the connecting element 8, a first fastening means 17, which is functionally integral with the pressing section 9, extends. The first fastening means 17 has an internal thread 27 within the connecting bore 16 (see FIG. 10) in order to be connected to the second fastening means 18 which in turn is a screw element, can be screwed. The pressing section 9 has in the exemplary embodiment the Figures 10 to 12 slotted sections, in the manner of spring tabs connected on both sides, each spring tab forming one of the side contact surfaces 11. The spring tabs are convex or bulbous and represent a defined weak point in the connecting element 8. If the second fastening means 18 or the screw element is now screwed to the internal thread 27 of the first fastening means 17, the effect applied to the connecting element 8 as part of the screw connection axial force component causes the spring tabs to expand as soon as the connecting element 8 is supported with its front contact surface 14 on the second electrical conductor 3. The principle is basically known from expansion dowels in drywall construction and is surprisingly very suitable for use in the context of the present invention.

A further development of the connecting element 8, which is one piece with the first fastening means 17, can be an anti-rotation device between the pressing section 9 and the contact recess 13 of the first electrical conductor 2, as in Figure 11 shown. For example, the contact recess 13 can have a polygonal cross section, as already mentioned above, in order to cooperate securely against rotation with an axial region of the pressing section 9 which is also polygonal.

Another embodiment of the invention is in the Figures 13 to 15 shown.

Similar to the previous exemplary embodiment, the connecting element 8 is formed in one piece with the first fastening means 17. In contrast to the previous exemplary embodiments, however, no screw or threaded connection is provided between the fastening means 17, 18, but rather a press connection.

For this purpose, the second fastening means 18 is designed as a bolt, with a bolt head 21 'and a bolt shaft 19'. The connecting hole 16 is corresponding

Connecting element 8 is designed to accommodate the bolt shaft 19 'accurately, so that the fastening means 17, 18 can be pressed together with sufficient force. As can be seen from the Figures 14 and 15 results, the contact flange 22 is advantageously formed on the connecting element 8 in this case. This means that the connecting element 8 is supported with its contact surface 14 on the side surface 15 of the second electrical conductor 3 facing away from the first electrical conductor 2 after the bolt or the second fastening means 18 has been connected to the connecting element 8.

So that expansion can take place in the pressing section 9, the connecting element 8 has a tapering section 28 in its upper end section facing the second electrical conductor 3. By pressing in the bolt shaft 19 ', the connecting element 8 expands in the lower pressing section 9 facing the first electrical conductor 2 and causes the frictional connection within the contact recess 13.

At this point it should be mentioned that inserting the second fastening means 18, for example pressing the bolt into the Figures 13 to 15 , can also be provided starting from the first electrical conductor 2. In this case, it may be advantageous to ensure that the first fastening means 17 is not pushed out of the second electrical conductor 3. This can be done, for example, by an additional or alternative contact flange 22 or other contact section on the side surface of the second electrical conductor 3 facing the first electrical conductor 2 and/or on the side surface of the first electrical conductor 2 facing away from the second electrical conductor 3, or by a corresponding Locking means, such as a locking hook, which correspondingly engages behind at least one of the electrical conductors 2, 3. For example, the spring tabs of the pressing section 9 can have a latching hook at their ends or can be shaped accordingly in order to form a latching hook.

Claims (15)

Electrical connection arrangement (4) for electrically and mechanically connecting a first electrical conductor (2) to a second electrical conductor (3), comprising an electrical connecting element (8) with a first end and with a second end, with a pressing section at the first end (9) is arranged, which has at least one lateral contact surface (11) for electrically contacting an inner lateral surface (12) of a contact recess (13) of the first electrical conductor (2), and wherein a contact section (10) is arranged at the second end, which has a contact surface (14) for non-positive connection to a side surface (15) of the second electrical conductor (3), a connecting bore (16) extending at least between the contact section (10) and the pressing section (9), so that the connecting element (8) can accommodate a first fastening means (17) or itself forms a first fastening means (17), and can accommodate a second fastening means (18) which can be connected to the first fastening means (17), so that the non-positive connection between the contact surface (14) of the contact section (10) and the side surface (15) of the second electrical conductor (3), and wherein the pressing section (9) can be radially expanded by the first fastening means (17) and/or by the second fastening means (18). is to bring about a non-positive connection between the at least one lateral contact surface (11) and the inner lateral surface (12) of the contact recess (13) by connecting the two fastening means (17, 18) to one another. Electrical connection arrangement (4) according to claim 1,
characterized in that
the connecting element (8) is primarily sleeve-shaped, with the connecting bore (16) extending completely through the connecting element (8). Electrical connection arrangement (4) according to claim 1 or 2,
characterized in that
the contact section (10) is formed in one piece with the pressing section (9). Electrical connection arrangement (4) according to one of claims 1 to 3,
characterized in that
the connecting element (8), preferably the contact section (10) of the connecting element (8), has a mechanical interface (26) for a rotation-proof mechanical connection to at least one of the electrical conductors (2, 3). Electrical connection arrangement (4) according to one of claims 1 to 4,
characterized in that
the pressing section (9) is designed to accommodate the first fastening means (17) in a rotationally secure manner. Electrical connection arrangement (4) according to one of claims 1 to 5,
characterized in that
the pressing section (9) is slotted in the longitudinal direction in order to form the at least one lateral contact surface (11) between two longitudinal slots, preferably a plurality of lateral contact surfaces (11) being formed in the manner of spring tabs of a spring basket. Electrical connection arrangement (4) according to one of claims 1 to 6,
characterized in that
the at least one lateral contact surface (11) has a convex curvature. Electrical connection system (1), in particular electrical connection system (1) for high-voltage technology, comprising an electrical connection arrangement (4) according to one of claims 1 to 7, and the first fastening means (17), wherein the first fastening means (17) in the pressing section ( 9) is accommodated within the connecting hole (16). Electrical connection system (1) according to claim 8,
characterized in that
to cause the pressing section (9) to expand as a result of connecting the two fastening means (17, 18), a) the first fastening means (17) on the outer jacket side and/or b) the pressing section (9) tapers, preferably tapers conically, on the inner casing side, within the connecting bore (16), in the direction of the second end of the connecting element (8). Electrical connection system (1) according to claim 8 or 9,
characterized in that
the first fastening means (17) has an internal thread to form a threaded connection with the second fastening means (18). Electrical connection system (1) according to one of claims 8 to 10, comprising the second fastening means (18), wherein the second fastening means (18) is accommodated at least in sections in the contact section (10) within the connecting bore (16). Electrical connection system (1) according to claim 11,
characterized in that
the second fastening means (18) has a screw element, a) with a screw shaft (19) which can be passed through a fastening recess (20) of the second electrical conductor (3) and which extends at least in sections through the connecting bore (16), the screw shaft (19) being used to form a threaded connection the first fastening means (17) has an external thread; and b) with a screw head (21) which is supported directly or indirectly on a side surface of the second electrical conductor (3) facing away from the contact surface (14) of the contact section (10). Electrical connection system (1) according to one of claims 8 to 12, comprising the first electrical conductor (2) and the second electrical conductor (3), the electrical conductors (2, 3) preferably each being designed as busbars. Electrical connection system (1) according to claim 13,
characterized in that
a fastening recess (20) of the second electrical conductor (3), through which the second connecting means (18) is passed, has a larger cross-sectional extent to compensate for mechanical tolerances than the section of the second connecting means (18) running through the fastening recess (20). Method for producing an electrical and mechanical connection between a first electrical conductor (2) and a second electrical conductor (3), comprising at least the following method steps: - Arranging an electrical connecting element (8) with a pressing section (9) arranged at a first end, a contact section (10) arranged at a second end and a connecting bore (16), which is at least extends between the contact section (10) and the pressing section (9), between the electrical conductors (2, 3); - Introducing a first fastening means (17) into the connecting bore (16) or designing the connecting element (8) in such a way that it itself forms a first fastening means (17); - Introducing a second fastener (18) into the connecting hole (16); and - Connecting the two fastening means (17, 18) so that a contact surface (14) of the contact section (10) comes into contact with a side surface (15) of the second electrical conductor (3) and the first fastening means (17) or the second fastening means (18) radially expands the pressing section (9) in order to effect a non-positive connection between at least one lateral contact surface (11) of the pressing section (9) and an inner surface (12) of a contact recess (13) of the first electrical conductor (2).

Images