CONNECTION PART WITH DOUBLE BURSTS

Description

[0001] The subject matter relates to a connection part, in particular for electric vehicles, a plug and a system comprising a connection part and a plug.

[0002] Document WO 2017 / 182129 discloses a connecting part according to the preamble of claim 1.

[0003] One of the challenges of electrifying automobiles lies in the transmission of high currents within the vehicle. In particular, in electrically powered vehicles, a high-capacity electric battery must typically be charged as quickly as possible, ideally significantly faster than it is subsequently discharged during operation. To achieve this, the electrical cables in the vehicle must be capable of transporting high charging power with high currents and / or voltages. At the same time, the space required, weight, and, last but not least, the price of the cables must be kept as low as possible. In addition to transmitting electrical current, the transmission, absorption, and dissipation of heat in the electrical distribution system are also important functions of the cables.

[0004] In particular, at transitions between different electrically conductive components, a contact resistance can occur, which generates increased heat.

[0005] The object of the invention was therefore to create a cable arrangement that is as compact, lightweight and inexpensive as possible, which can transport high electrical power with the lowest possible electrical resistance and is also protected against overheating.

[0006] This object is achieved by a connection part according to claim 1, a plug according to claim 14 and a system according to claim 15

[0007] The connection part in question comprises at least two busbars. At least one of the busbars will be described first below.

[0008] The busbar in particular has a substantially rectangular cross-section. The cross-section can have two opposing and substantially parallel broad sides and two narrow sides arranged substantially perpendicularly thereto, substantially parallel to each other and opposite each other. At least one of the narrow sides is in particular oriented perpendicular to at least one of the broad sides. The busbar at least partially has a longitudinal axis. This runs substantially perpendicular to both the narrow and broad sides. The broad side is wider than the narrow side perpendicular to the longitudinal axis. A width extension can be defined as the width of the busbar in a direction that runs perpendicular to the longitudinal axis and parallel to the broad side. The width extension can also be defined as the width in the direction that runs perpendicular to the narrow side.

[0009] An axis which is aligned substantially perpendicular to the longitudinal axis and substantially parallel to at least one of the broad sides of the busbar and / or which is aligned substantially perpendicular to the narrow side of the busbar may be called a broad axis.

[0010] The longitudinal axis can have different orientations for different segments of the busbar. For example, the busbar can be deformed; in particular, the busbar can be deformed about at least one lateral axis. Consequently, at least two different segments of the busbar can have differently oriented longitudinal axes. In the case of a substantially straight busbar, the longitudinal axis of all segments of the busbar can have substantially the same orientation.

[0011] If the busbar is cut to length, an end face can also be defined. For this end face, for example, the longitudinal axis can at least partially essentially form the surface normal. The end face can, in particular, be aligned at least partially perpendicular to at least parts of the narrow sides and to at least parts of the wide sides.

[0012] The busbar is formed from an electrically conductive material, such as a metal. The busbar can be formed from copper, aluminum, alloys thereof, and / or other metal materials. In particular, the busbar can be formed from soft-annealed aluminum. Aluminum is lightweight, which is a great advantage for use in vehicles. Furthermore, aluminum is cheaper than copper. The busbar can also be formed from a different material.

[0013] The busbar may be at least partially coated, for example with silver, gold, nickel and / or alloys thereof and / or multi-layer arrangements of these and / or combinations of these metal materials, for example with a nickel-plated silver coating.

[0014] The advantage of using a busbar is that, thanks to its solid construction and large cross-sections, it provides good conductivity for heat and electricity. Furthermore, the heat capacity is high, particularly due to the volume of the busbar. The larger surface area compared to round conductors with the same cross-sectional area also allows more heat to be radiated through the surface of the busbar.

[0015] At least one of the busbars can have a cross-section of at least 50 mm², preferably between 100 and 300 mm². Larger cross-sections are also possible if a particularly high electrical power and / or a particularly large amount of heat must be transported.

[0016] An overlapping region can be defined for the at least two busbars. The two busbars can overlap in the overlapping region. In particular, the busbars can overlap in such a way that at least one of the busbars overlaps one of the broad sides of another of the at least two busbars with one of its broad sides. In the overlapping region of the at least two busbars, a broad side of a first of the at least two busbars can therefore overlap a broad side of a second of the at least two busbars. An overlap can mean that the at least two busbars at least partially overlap one another when viewed from above onto one of the broad sides of one of the busbars, in particular in the direction of a surface normal to at least one of the broad sides of at least one of the busbars.

[0017] In the overlap region, at least two of the at least two busbars can partially overlap each other. At least two of the at least two busbars can also substantially completely overlap each other, at least in part of the overlap region or substantially in the entire overlap region.

[0018] The longitudinal axes of the at least two busbars can run at least partially parallel to one another. In this case, the longitudinal axes of the at least two busbars can each run at least partially straight. However, for the longitudinal axes of the at least two busbars to run parallel, it is not necessary for them to run straight. The respective longitudinal axes of the busbars can also be deformed, for example, bent. As long as the busbars follow one another in their deformation and / or, for example, maintain a constant distance from one another, the longitudinal axes are considered to be parallel to one another.

[0019] The at least two busbars can run substantially parallel to one another, at least in parts of the overlapping region. In particular, the distance between at least two of the at least two busbars, in particular between the broad sides of the busbars, each of which faces a broad side of another of the at least two busbars, can be substantially constant along the longitudinal axis of at least one of the busbars, at least in part of the overlapping region.

[0020] The longitudinal axes of the at least two busbars can also be tilted relative to one another. For example, the broad sides of the at least two busbars can be spaced apart from one another along the longitudinal axis of at least one of the at least two busbars. Two of the at least two busbars can also be aligned with their broad sides at least substantially parallel to one another, while the longitudinal axes of the busbars are tilted relative to one another in a plane parallel to the broad sides. The busbars can also be tilted relative to one another about their respective longitudinal axis, so that the distance between two busbars varies along the broad axis of at least one of the busbars, in particular is greater on a first side than on the second side opposite along the broad axis.

[0021] The broad sides of at least two of the at least two busbars can be aligned with their broad sides at least in part at least substantially parallel to one another.

[0022] In addition to the overlap region, an end section can be defined. The end section is different from the overlap region. The end section can be defined for each busbar. A common end section of the at least two busbars can also be defined, in which, in particular, the end sections of at least two of the at least two busbars are arranged. In particular, the at least two busbars, with their respective end sections different from the overlap region, terminate in a common end section.

[0023] A connection element can be arranged on each of the at least two busbars. The connection element is arranged in the end section of the respective busbar. With at least two busbars and at least one connection element in each of the at least two busbars, at least two connection elements also result. The connection elements of the at least two busbars are spaced apart from one another. In particular, the connection elements of at least two busbars can be spaced apart from one another along a width axis of at least one of the at least two busbars. Alternatively or additionally, the connection elements can be spaced apart along a surface normal to at least one width side of at least one of the at least two busbars.

[0024] The end section of at least one of the busbars can in particular comprise the end of a cut-to-length busbar.

[0025] The width of the end section of at least a first of the at least two busbars can be reduced compared to the width of the first busbar in at least parts of the overlap region. Thus, the busbar can have a smaller width in the end section, at least in part, than in the overlap region.

[0026] A reduced width of the busbar in the end section, in other words, a reduced width of the end section of the busbar, can be particularly advantageous for busbars that at least partially overlap, for example, when arranged one above the other. The overlap can thus be eliminated, particularly in the end region.

[0027] The width of the end section of a first of the at least two busbars can be reduced such that the connection element of the second busbar is free from overlap by the end section of the first busbar. This allows the connection elements of the at least two busbars to be reached from a broad side of one of the at least two overlapping busbars.

[0028] Reducing the width of the end section of a first of the at least two busbars can substantially completely expose the connecting part of a second of the at least two busbars. It can also partially expose the connecting part. The connecting part can also be exposed from the first busbar, including a safety distance around the connecting part. For example, the safety distance can be substantially at least half and / or the entire width of the connecting part.

[0029] In particular, the at least two connection elements of the at least two busbars can be arranged essentially at the same position along the longitudinal axis of at least a part of at least one of the at least two busbars. This can mean that the at least two connection parts are essentially not spaced apart from one another along the longitudinal axis of at least a part of at least one of the at least two busbars and / or have only a very small and / or essentially no spacing from one another along this axis. In a plan view of at least one broad side of at least one of the at least two busbars, the connection elements can be spaced apart along a broad axis and in particular essentially not along the longitudinal axis.

[0030] Due to a reduced width of at least one of the at least two busbars, in particular in the end section of the busbar, the contact elements of at least two of the at least two busbars can be reached from one broad side. It is therefore not necessary, in particular, to contact the connection elements from at least two mutually opposite broad sides of the busbars of the connection part. This applies in particular to contact elements that are not spaced apart from one another along the longitudinal axis of at least one of the at least two busbars, i.e., that have the same position along the longitudinal axis of at least one of the at least two busbars.

[0031] The end faces of the at least two busbars can be substantially flush with one another. This can mean that the end faces of the at least two busbars are arranged at substantially the same position along the longitudinal axis of at least one of the at least two busbars. The end faces can therefore have only a very small and / or substantially no distance from one another along the longitudinal axis of at least one of the at least two busbars. Thanks to the reduced width of the end section of at least one of the busbars, it is possible to contact the at least two connection parts of the at least two busbars from a broad side of at least one of the busbars, despite the end faces of the at least two busbars being flush.

[0032] In one embodiment, the widths of the end sections of at least two of the at least two busbars are reduced. Thus, as described above, the end section of a first busbar can have a reduced width. Additionally, in the case of a second of the at least two busbars, a width of the end section of the second busbar can be reduced compared to a width of the second busbar in at least parts of the overlap region. In particular, the end section can be reduced in its width such that the connection element of the first busbar is free from overlap by the end section of the second busbar.

[0033] In particular, both the connecting part of a first of the at least two busbars is free from an overlap by at least a second of the at least two busbars and the connecting part of a second of the at least two busbars is free from an overlap by at least the first of the at least two busbars.

[0034] Thus, in particular, at least two of the at least two busbars can each be tapered in their width in their end section in such a way that the connection element of the other busbars is not covered by them, i.e. they do not overlap it.

[0035] Not only can the connecting element of one busbar be exposed by reducing the width of another of the at least two busbars, i.e., freed from overlap by the other busbar. At least a portion of the end section of a busbar can also be free from overlap by other busbars.

[0036] In one embodiment, in particular, a width extension of the end section of a first busbar of the at least two busbars can be reduced compared to a width extension of the first busbar in at least parts of the overlap region. Additionally or alternatively, a width extension of the end section of at least a second of the at least two busbars can be reduced compared to a width extension of the second busbar in at least parts of the overlap region. The reduction in the width extension of the first and / or the second busbar can be designed such that at least part of the end section of the second busbar is substantially free of an overlap by the end section of the first busbar.In particular, at least a portion of the end section of the second busbar can be free from overlap by the first busbar over the entire width extension, for example parallel to a width axis, of at least a portion of the end section of the second busbar. This portion can contain the connecting part of the second busbar. Likewise, at least a portion of the end section of the first busbar can be substantially free from overlap by the end section of the second busbar. In particular, at least a portion of the end section of the first busbar can be free from overlap by the second busbar over the entire width extension parallel to a width axis of at least a portion of the end section of the first busbar. This portion can contain the connecting part of the first busbar.

[0037] It was recognized that stacked busbars offer significant space savings compared to side-by-side busbars. At the same time, the proximity of the broad sides of at least two busbars enables heat transfer between the busbars. Local heating of a busbar can be absorbed by the adjacent busbar. A disadvantage of stacked busbars is the more complex connection geometry. The broad sides of completely overlapping busbars can only be accessed from two opposite sides.

[0038] It was further recognized that a local narrowing of at least one busbar, particularly in an end section, is accompanied by only a minor reduction in the electrical and thermal conductivity of the entire busbar. Because only a small portion of the busbar has a reduced width, the entire busbar retains high thermal conductivity, capacity, and dissipation capability. Heat generated, for example, at connecting parts arranged in the narrowed end section can flow from there into the wide overlap area, where it can be absorbed and dissipated. The busbar thus very closely resembles the thermal and electrical properties of a continuously wide busbar.In particular, the connection part in question is electrically and thermally significantly more efficient than, for example, a juxtaposition of two busbars, each of which has the reduced width of the end section in question. At the same time, the reduction in the width in the end section of at least one busbar leads to a significant simplification of the connection geometry. This is because both busbars can be contacted on their broad sides starting from a common side. The connection elements can be arranged in the same position along the longitudinal axis of the busbars. The connection parts can also be offset from one another along the longitudinal axis. The connection geometry is therefore just as flexible and uncomplicated as with two busbars of the same width arranged side by side.

[0039] The end sections of at least two of the at least two busbars can be spaced apart from one another along a width axis of at least a part of at least one end section of the at least two busbars, in particular by a gap. For example, in a plan view of at least one wide side of the at least two busbars, the gap between the end sections can be visible. This gap can, for example, have an insulating effect between the busbars of the connecting part.

[0040] A central axis can be defined for a busbar. The central axis can run between the two narrow sides of the busbar, in particular centrally between the two narrow sides. The central axis can also run centrally between the two wide sides. In particular, the central axis can run through the center point of at least one cross-section of the busbar. The cross-section can lie in a plane perpendicular to the longitudinal axis of the busbar. The center point can be defined, for example, as the center of gravity of the cross-section.

[0041] The central axis of a busbar can shift with a reduction in the width of the busbar compared to a region of the busbar with the full width. In particular, the central axis of the busbar in the overlap region of the busbar can be different from the central axis of the busbar in the end section of the busbar. The central axis of the end section can be arranged eccentrically to the central axis of the overlap region. The central axis of the end section can be eccentrically offset relative to the central axis of the overlap region, in particular along the width axis of at least part of the busbar.

[0042] The end section of at least one of the busbars can be arranged eccentrically relative to the central axis of the busbar in at least parts of the overlapping region.

[0043] In particular, the end sections of two of the at least two busbars can be eccentrically spaced substantially in mutually opposite directions relative to the central axis of the respective busbar in at least parts of the overlapping region.

[0044] The thickness of a busbar can be defined as the dimension of the busbar in the direction of the surface normal to at least part of the busbar's broad side. The thickness is therefore measured in particular perpendicular to the broad side of the busbar.

[0045] The thickness of one of the at least two busbars may be substantially constant over at least a major part of the busbar and / or over the entire busbar.

[0046] In particular, a recess in at least one of the at least two busbars can reduce the width of at least part of the end section of the busbar. In particular, a one-sided recess in the end section of at least one of the at least two busbars can reduce the width of the end section. A one-sided recess reduces the width of the busbar only on one side of the busbar. In particular, the one-sided recess only changes the course of one of the two narrow sides of the busbar. A first of the two narrow sides of the busbar runs in the region of the one-sided recess essentially as it would run without the one-sided recess. In particular, a first narrow side can run essentially parallel to the longitudinal axis of the busbar.A second narrow side of the busbar, different from the first, can be offset in the direction of the central axis of the busbar in at least one section of the busbar, in particular in at least a part of the end section.

[0047] At least one of the busbars may also have a closed opening that exposes the connecting part of another of the busbars. In this case, the narrow sides of the busbar may run substantially parallel to the longitudinal axis of the busbar.

[0048] In one embodiment, at least two of the at least two busbars have a substantially equal width extension to one another, at least in parts of the overlapping region.

[0049] In particular, at least two narrow sides of the at least two of the at least two busbars can be substantially flush with one another in the direction of the surface normal to at least one broad side of at least one of the at least two busbars, at least in part of the at least two busbars, in particular in the overlap region of the busbars. The connecting part can therefore be characterized in that at least two of the narrow sides of the at least two busbars are substantially flush with one another in the direction of the surface normal to at least one of the broad sides of at least one of the busbars, at least in the overlap region. Both narrow sides of at least two of the at least two busbars can also be substantially flush with one another. In this case, the busbars can in particular overlap substantially completely.

[0050] The end sections of at least two of the busbars can have at least partially the same width extension.

[0051] For example, the width of the end section of at least one of the at least two busbars can substantially correspond to half the width of the busbar in the overlap region. In particular, the width of the end section of at least one of the at least two busbars can be smaller than half the width of the busbar in the overlap region. The widths of the end sections of at least two busbars can also each be dimensioned in this way. Thus, the end sections of at least one of the at least two busbars can be spaced apart from one another in the width of the busbar.

[0052] The widths of at least two end sections of each of at least two busbars can be less in total than the width of at least one of the busbars in at least part of the overlapping area. The at least two widths of the respective end sections can be at least partially different from one another.

[0053] The longitudinal axes of at least two of the at least two busbars can run substantially parallel to one another. In particular, in the region of the transition between the overlap region and the end section and / or the end section, the longitudinal axes of at least two of the at least two busbars can run parallel to one another. In particular, the broad sides of at least two of the at least two busbars can be aligned parallel to one another. In particular, the distance between two of the at least two busbars along the surface normal to at least one broad side of the at least two busbars can be substantially constant, in particular in at least parts of the overlap region, the end section and / or the transition between the overlap region and the end section.

[0054] The end sections of at least two of the at least two busbars can be spaced apart from one another along the surface normal on at least part of the broad side of at least one of the busbars, at least partially by a height offset. For example, the height offset of the end sections of two busbars can measure the distance between the mutually facing broad sides of the two busbars plus the thickness of one of the busbars. In particular, the connection elements of at least two of the at least two busbars can be spaced apart from one another along the surface normal on at least one broad side of at least one of the at least two busbars, in particular by the height offset.

[0055] It is also possible for the end sections of at least two of the at least two busbars to be spaced apart from one another along the surface normal to at least one broad side of the at least two busbars by a smaller distance than the distance between the busbars in this direction in at least parts of the overlapping region. Thus, in particular, at least two of the at least two busbars can have a smaller height offset from one another in the end section along the surface normal to the broad side of at least part of at least one of the at least two busbars than in at least parts of the overlapping region.

[0056] The end sections of at least two of the at least two busbars can lie at least partially substantially in one plane. The end sections can therefore have only a small and / or substantially no spacing along the surface normal on at least part of at least one broad side of the end section of at least one of the at least two busbars. The at least two broad sides of the end sections of at least two of the at least two busbars pointing in a common direction can lie at least partially substantially in one plane. In this way, the connection elements of the two of the at least two busbars can also lie substantially in a common plane.

[0057] At least one of the at least two busbars and / or the longitudinal axis of at least one of the at least two busbars can have a curved profile, at least in part. In particular, at least one of the at least two busbars can have a curved profile toward at least one other of the at least two busbars, in particular a curved profile around a width axis of at least part of the busbars. In this way, the two busbars can be brought closer to one another, particularly in the end section.

[0058] In particular, at least one of the at least two busbars can be brought closer to another of the at least two busbars, in particular in the end section. For example, at least one of the at least two busbars can be bent in at least part of the overlap region, the end section, the transition region, and / or several of these regions. In particular, the busbar can be bent around one and / or more width axes of the busbar, for example, in a substantially S-shape.

[0059] By combining a curved busbar with a straight busbar, the end sections of the at least two busbars can be located at least partially in a common plane. In particular, the connection elements can be located in a common plane.

[0060] In particular, the curved busbar can have, in at least parts of the overlapping region, a broad side oriented substantially parallel to another of the at least two busbars. The curved busbar can also have, in at least parts of the end section, a broad side oriented substantially parallel to another of the at least two busbars. Thus, in particular, the regions of the end sections of at least two of the at least two busbars, in each of which a connection element is arranged, are oriented substantially parallel to one another.

[0061] Even in a connecting part comprising at least one curved busbar and at least one substantially straight busbar, the at least two end faces of the at least two busbars can be substantially flush with one another, in particular in the direction of the width extension and / or in the direction of the width axis of at least one of the end sections of the at least two busbars. The end faces can therefore be located at substantially the same position along the longitudinal axis of at least a part of at least one of the at least two busbars of the connecting part and / or can be substantially not spaced apart along the longitudinal axis.

[0062] A curved busbar can be longer than a straight busbar. In particular, the end section of a curved busbar can be longer than the end section of a straight busbar. This can enable the end face of a curved busbar and the end face of a straight busbar to be located at substantially the same position along the longitudinal axis of at least a part of at least one of the at least two busbars, as described above. The extended path of the curved connecting part in the region of the bend in the curved busbar can thus be compensated for by an increased length of the curved busbar and / or the end section of the curved busbar.

[0063] The transition between at least one broad side and / or at least one narrow side and the end face of the busbar of at least one of the at least two busbars can be substantially angular. For example, the narrow sides and / or broad sides can each form a substantially angular transition with the end face, for example a 90-degree transition. At least one of the at least two busbars can also have an at least partially rounded shape in an end section. For example, the shape of at least one broad side can be substantially rounded towards the end face of the busbar. For example, at least one corner of the busbar can be rounded. A rounded end section of the busbar facilitates insertion of the busbar into a housing and / or a seal.

[0064] In one embodiment, at least one of the at least two busbars has a side recess. At least one of the busbars can thus be provided with a side recess. In particular, the side recess can be arranged in an end section of the busbar.

[0065] The side recess can be arranged on one side of the busbar so that the side recess interrupts the otherwise largely straight course of the narrow side.

[0066] An outer side can be defined for a busbar, in particular for an end section of a busbar. This outer side delimits the combination of the at least

[0067] The side recess can be arranged on the outside of the busbar.

[0068] The side recess may have a constant shape along the surface normal to one of the broad sides of the busbar.

[0069] When viewed from above, the edge of the side recess can run essentially perpendicular to the longitudinal edge on at least one side of the side recess, starting from the longitudinal edge and into the busbar. Both edges of the side recess can also run essentially perpendicular to the longitudinal edge into the busbar. Other edge configurations on at least one side of the side recess are also possible. For example, the side recess can have one or two edges that are slanted relative to the narrow side when viewed from above. For example, at least one of the edges of the side recess can be at an angle of 30-60° relative to the narrow side. In particular, one edge can run essentially perpendicular to the longitudinal edge and the other at an angle. The side recess can be shaped such that it forms a hook and / or an undercut when viewed from above.

[0070] The side recess can be essentially angular, for example, square. The side recess can also be rounded, for example, essentially semicircular. A quarter-circle shape is also possible.

[0071] A side recess can be used to lock the busbar into a designated holder. A locking element of the connection assembly can engage in the side recess. Another movable element, such as a screw element, can also engage in the side recess. Alternatively or additionally, the busbar can be overmolded with a retaining element, such as plastic, in particular at least parts of the housing. This retaining element can engage in the side recess.

[0072] At least two of the connection elements can be arranged substantially at the same position along the longitudinal axis of at least one of the at least two busbars.

[0073] At least one of the at least two connection parts can be arranged centrally in the end section of the respective busbar with respect to the central axis of the end section. The central axis can run centrally in the broad side of the end section along the longitudinal direction of the busbar when viewed from above onto the broad side of the end section, so that it is at substantially the same distance from both narrow sides. The connection element can also be arranged decentrally and / or eccentrically on the busbar with respect to the central axis of the end section of the busbar. Thus, at least one of the connection elements can be arranged substantially on the central axis of the end section of the respective busbar. At least one of the connection elements can also be arranged substantially eccentrically to the central axis of the end section of the respective busbar.

[0074] In particular, the connection element can be arranged in an opening of the busbar, in particular in an opening in the end section of the busbar.

[0075] In particular, the opening of the busbar extends from a first broad side to the second broad side of the busbar opposite the first broad side.

[0076] The opening can be shaped, for example, as a through-hole. The through-hole can have a substantially round cross-section. An elliptical, angular, in particular triangular, square, pentagonal, hexagonal, polygonal, serrated, or otherwise shaped cross-section of the through-hole is also possible. The through-hole can have a substantially constant cross-section along the thickness of the busbar or a variable cross-section. For example, the through-hole can taper from a first to a second broad side.

[0077] The connecting element can be firmly bonded to the busbar, particularly in the opening, particularly at least partially to the inner surface of the opening. Other connection types are possible, for example, a force-fitting and / or form-fitting connection. However, a firmly bonded connection is advantageous for the electrical and thermal conductivity between the connecting element and the busbar.

[0078] At least one of the at least two connection parts can be made of an electrically conductive material. In particular, the connection part can be formed from a metal material, in particular copper, e-copper, aluminum, alloys thereof and / or other metal materials. An at least partial or complete coating of the connection part is also possible. For example, the connection part can be coated with silver, gold, nickel and / or alloys and / or combinations thereof. In particular, the connection part can be formed from copper, in particular e-copper, and at least partially, in particular substantially completely, provided with a nickel-plated silver coating.

[0079] At least one of the connecting elements can taper in an extension direction toward an end face of the connecting element facing away from the busbar. In particular, the extension direction of the connecting element can be aligned substantially parallel to the surface normal to at least one broad side of the busbar.

[0080] At least one of the at least two connection elements can have a greater, smaller, or substantially equal length in the direction of the surface normal to the broad side of at least part of the busbar compared to the thickness of the busbar. In particular, the connection part can project beyond the busbar on one and / or both broad sides in the direction of the surface normal to the broad side of at least part of the busbar, be recessed into the busbar, and / or be substantially flush with the busbar.

[0081] The connecting element may have a hole. In particular, the connecting element may have a blind hole, in particular a through hole.

[0082] The connection element can be formed as a connection bolt. A connection bolt can, for example, extend from the broad side of the busbar in a direction of extension. The direction of extension can, for example, be aligned substantially parallel to the surface normal to at least parts of the broad side of the busbar to which the connection bolt is connected. The connection bolt can end substantially flush with at least one of the broad sides of the busbar, in particular so that it ends within the opening in the direction of extension and / or does not protrude beyond the broad side. The connection bolt can also be countersunk into the busbar. The connection bolt can also protrude beyond the busbar on at least one and / or both broad sides of the busbar in the direction of the surface normal to at least one of the broad sides of the at least two busbars.The length of the connecting bolt can in particular be greater and / or longer in the direction of extension than the thickness of the busbar in the direction of the surface normal to at least one of the broad sides of the at least two busbars.

[0083] The terminal bolt may have a substantially round cross-section. The cross-section of the terminal bolt may also deviate from a round shape and be, for example, oval, square, or otherwise shaped differently from a round shape. The terminal bolt may have a collar, with which it preferably makes contact with a broad side of the busbar with which it is in contact. The collar may deviate from a round shape and be, for example, square.

[0084] The connecting bolt may have a blind hole, in particular a through hole.

[0085] The connection element can be formed as a sleeve. The sleeve in particular has a through-hole. The sleeve can be countersunk into the opening on one and / or both broad sides of the busbar, end flush with the broad side and / or project beyond the broad side, in particular in the direction of the surface normal to the broad side. The sleeve can have a collar on at least one of the two broad sides of a busbar to which the sleeve is connected. This collar can project beyond the edge of the opening in the busbar in which the sleeve is arranged, parallel to the broad side, in particular circumferentially around the opening.

[0086] In one embodiment, at least one connecting sleeve is connected to at least one of the connecting elements, in particular by force-fitting, form-fitting, and / or material-fitting. For example, the connecting sleeve can be fastened to the connecting element by means of a screw, which is guided, in particular, through the connecting element. For example, the connecting sleeve can have a thread for the screw.

[0087] The connecting sleeve can be formed from a conductive material, in particular from a metal material, for example, copper, aluminum, alloys thereof, and / or other metals. At least one coating can be applied to the connecting sleeve. For example, silver, gold, nickel, alloys thereof, and / or multilayer coatings, for example, a nickel-plated silver coating. In particular, the connecting sleeve can be formed from substantially the same material and / or the same combination of materials as the connecting part.

[0088] In particular, the length of the at least one connecting sleeve can substantially correspond to the height offset of the end sections of the at least two busbars. The height offset is to be determined in particular, as described above, parallel to the surface normal on at least parts of the broad side of at least one of the at least two busbars. The height offset can be determined from the distance between two broad sides of the end sections of two of the at least two busbars pointing in the same direction. This height offset can be compensated for with at least one connecting sleeve, the length of which substantially corresponds to the height offset between the end sections of at least two busbars.

[0089] At least two connecting sleeves can also be connected to a connecting element, in particular by force-fitting, form-fitting, and / or material-fitting means, for example by means of a screw as described above. In this case, the length difference between the at least two connecting sleeves can essentially correspond to the height offset of the end sections of the at least two busbars.

[0090] The connecting part may further comprise a housing.

[0091] The housing of the connecting part can, in particular, fix the at least two busbars relative to one another, wherein, in particular, the broad sides of the at least two busbars are at least partially spaced apart from one another. For example, at least a portion of the housing can be arranged between the at least two busbars.

[0092] The housing can be formed at least partially from a non-conductive material, in particular from a plastic, in particular from a high-temperature plastic, in particular from PA6GF15, UL94.

[0093] The end section of at least one of the at least two busbars can be led out of the housing at least partially on a connection side of the housing in the longitudinal direction of at least one of the busbars. In particular, part of the end section can be arranged in the housing. The end section can also be arranged completely outside the housing. In particular, at least one of the connection elements can be arranged outside the housing. The housing can also substantially enclose the end section of at least one of the at least two busbars. In this case, openings can be provided in the housing which expose at least one of the connection elements. In particular, exposing here means that the connection element can be reached in a straight line, in particular in the direction of extension, through the opening.

[0094] The overlapping region of at least one of the at least two busbars can be led out of the housing, at least partially, in the longitudinal direction of at least one of the busbars on a laying side of the housing facing away from the connection side. The overlapping region of at least one of the at least two busbars can be arranged at least partially within the housing. In particular, the overlapping region is arranged largely outside the housing. The overlapping region can also be arranged entirely outside the housing.

[0095] The connecting part may further comprise at least one seal.

[0096] At least one of the at least one seal can enclose at least one of the at least two busbars all the way around. In particular, the seal can enclose the at least two busbars together and / or individually all the way around. The seal can also enclose each of the at least two busbars, in particular all the way around. The seal can be in direct contact with the busbar, in particular all the way around, at least partially or along the entire circumference of the busbar that is enclosed by the seal. In particular, the opening in the seal, in which the respective busbar is arranged, can have a cross-section adapted to the busbar. For example, the opening in the seal in the relaxed state, in particular without a busbar, can be smaller than the cross-section of the busbar. Due to the elasticity of the seal material, the seal can fit snugly around the busbar all the way around.

[0097] A seal may have at least two openings. Each of the openings may accommodate a busbar.

[0098] A seal can have a spacing region arranged between at least two of the at least two busbars. The spacing region can, for example, adjust the spacing of the busbars in the direction of the surface normal to at least a portion of the broad side of at least one of the at least two busbars.

[0099] The spacing region can have a lip that extends substantially parallel to the broad side of at least a portion of at least one of the at least two busbars. The lip can project beyond the remaining seal. For example, the lip can project beyond the remaining seal toward the end portion of at least one of the busbars.

[0100] At least one of the at least one seal can be molded from silicone, rubber, and / or plastic. For example, the seal can also be injection-molded and / or cast together with the housing, particularly using a two-component injection molding process.

[0101] At least one of the at least one seal can have at least two, preferably three or more ribs. The ribs can be arranged on the inner surface of the seal, which comes into contact with at least one of the busbars. Additionally or alternatively, the ribs can also be arranged on the outer surface of the seal, which faces away from the busbar. A rib can, for example, be formed as an elevation of the seal, in particular as a web-shaped elevation, which is arranged in particular around the opening of the seal, which can enclose at least one busbar, in particular is arranged circumferentially.

[0102] The housing of the connecting part can enclose at least one of the at least two busbars with at least one busbar opening, wherein the busbar opening is preferably cross-sectionally adapted to the busbar. The busbar opening can, for example, contact the busbar at least partially around its circumference, for example directly or indirectly, for example via a seal.

[0103] At least one of the at least one seal can be arranged at least partially between at least one of the at least two busbars and the housing, in particular with a press fit. The seal can, for example, be arranged with a press fit between the busbar and the housing.

[0104] The housing may comprise at least two sections which together form at least one rail opening with a cross-section adapted to at least one of the busbars.

[0105] At least one of the at least two sections can be plugged onto at least one of the at least two busbars substantially perpendicular to the longitudinal axis of the at least two busbars and / or substantially parallel to the broad side of at least one of the busbars. In particular, at least one of the sections can be plugged onto at least one of the at least two busbars starting from the narrow side of at least one of the busbars.

[0106] At least one of the sections can, for example, have at least one recess whose width is adapted to the thickness of the busbar. For example, the width of the recess can essentially correspond to the thickness of the busbar. The recess can also have a width that is greater than the thickness of the busbar. In particular, the width of the recess can correspond to the thickness of the combination of a busbar and a seal enclosing the busbar. The recess can also have a width that corresponds to the thickness of at least two busbars that are also enclosed by at least one seal. This makes it possible, for example, to plug the section onto at least one busbar enclosed by a seal.

[0107] The at least two sections of the housing can be fastened to one another. At least one of the at least two sections can have a plug-in projection and / or at least one of the at least two sections can have a plug-in receptacle. In particular, the plug-in projection of a first section can be inserted into the plug-in receptacle of a second section. The plug-in projection can have a cross-section adapted to the plug-in receptacle. In particular, the plug-in projection can be plugged in substantially perpendicular to the longitudinal axis of at least a part of at least one of the at least two busbars. The plug-in receptacle and / or the plug-in projection, in particular in combination, enable at least a positive connection between the sections. A force-fitting connection may also be possible.

[0108] A plug-in projection can, for example, have a raised portion. The raised portion can extend in the plug-in direction along the plug-in projection, for example, as a web. The plug-in receptacle can have a corresponding recess. The positive connection between the plug-in projection and the plug-in device is thus improved. The plug-in direction can be the direction in which the plug-in projection is inserted into the plug-in receptacle.

[0109] The plug-in projection and / or the plug-in receptacle can have a cross-section that is essentially at least partially, preferably essentially completely, constant along the plug-in direction. This ensures a positive fit between the plug-in projection and receptacle even when the plug-in projection is not fully inserted. Thus, the housing has a variable width in the plug-in direction.

[0110] The plug-in direction of at least one pair of plug-in projection and plug-in receptacle runs in particular substantially parallel to a broad side of at least one of the busbars.

[0111] In one embodiment, at least one section has both a plug-in projection and a plug-in receptacle. At least two sections can also each have a plug-in projection and a plug-in receptacle.

[0112] At least one fastening means can be arranged on at least one of the at least two sections. This is particularly suitable for connecting the at least two sections to one another, in particular for connecting them permanently. The fastening means can in particular be a force-fitting and / or form-fitting fastening means. For example, the fastening means can comprise at least one screw and / or at least one thread. For example, a screw can be fastened to at least one of the sections, for example by means of a hole, in particular a hole reinforced with an insert. For example, a feedthrough can be let into the hole, for example a feedthrough made of a metal material, for example a sleeve. A screw receptacle can for example be arranged in one of the sections.A screw receptacle can be embedded in the section, for example as a blind hole, through hole and / or as a thread that is embedded in the housing, in particular made of a metal material.

[0113] In one embodiment, at least one of the at least two busbars is at least partially insulated. In particular, the busbar is at least partially surrounded by an insulating layer. In particular, an insulating layer can be arranged on at least parts of a broad side of the busbar that faces another of the at least two busbars.

[0114] At least one of the at least two busbars is coated, for example, with an insulating layer made of a non-conductive material, such as a plastic. A varnish or similar electrically non-conductive coating is also possible.

[0115] In particular, the busbar can be insulated in parts of the overlapping area. The insulated area of the busbar can extend, in particular, from outside the housing on the installation direction into the housing.

[0116] A portion of the end section of at least one of the at least two busbars can be insulated. In particular, the outer side of the end section can be at least partially insulated. The broad sides of the end section can also be at least partially insulated. If the reduction in the width of the end section is formed by a one-sided recess, the side edge in the region of the recess can be free of insulation. The connection element can be located in a stripped region of the end section. A frontal region of the end section can, in particular, be completely stripped.

[0117] At least one of the at least two busbars can therefore be at least partially stripped, at least in the end section. In particular, the outer side of the busbar, especially in the end region, can be at least partially insulated. The inner side of the busbar, which is the other narrow side of the busbar, different from the outer side, can also be at least partially stripped.

[0118] Another aspect concerns a plug.

[0119] The plug includes a plug housing.

[0120] The connector housing can preferably be formed from a non-conductive material. For example, from plastic, in particular a high-temperature plastic. For example, the connector housing can be formed from substantially the same material as the housing of the connecting part.

[0121] The connector housing may have fastening means. For example, this may include force-fitting and / or positive-fitting fastening means. In particular, the connector housing may include a screw receptacle, in particular a thread, as described above for the housing of the connector part. The connector housing may also include a hole and / or a passage for a screw, as described above for the housing of the connector part.

[0122] At least one fastening means can be arranged on the connecting part, in particular on the housing of the connecting part, and / or on the plug, in particular on the plug housing. In particular, this can be a force-fitting and / or form-fitting fastening means, in particular at least one screw and / or at least one thread.

[0123] The plug may further comprise a connection part, in particular a physical connection part as described above. The at least two busbars of the connection part may each have at least parts of an end section guided into the plug housing.

[0124] In particular, the housing of the connecting part can contact the plug housing, in particular in an area surrounding at least one of the and / or the at least two busbars.

[0125] At least one seal can be arranged between the plug housing and the housing of the connecting part. Preferably, the housing can be indirectly in contact with the plug housing via the seal, preferably circumferentially. In particular, the seal can preferably be arranged as a press fit between the housing of the connecting part and the plug housing.

[0126] Fasteners on the connector housing and / or on the connector housing can create contact pressure between the housing and the connector housing. The fasteners can achieve a press fit of the seal between the two housings.

[0127] Another aspect is a system consisting of a physical connection part and a physical plug.

[0128] In particular, the fastening means can cause a contact pressure between the housing and the connector housing, which keeps the seal in a press fit.

[0129] In the following, the subject matter of the invention is explained in more detail with reference to a drawing showing exemplary embodiments. Fig. 1 shows a connection part according to an embodiment; Fig. 2 shows a connection part according to an embodiment.

[0130] Fig. 1 shows a connection part 100 according to an exemplary embodiment. This comprises a first busbar 110 and a second busbar 120.

[0131] A busbar 110, 120 comprises two broad sides 112 and two narrow sides 114. An end face 115 can also be defined at the end of the busbar 110, 120.

[0132] An overlapping area 140 can be distinguished from a separate end section 130 of the busbars 110, 120.

[0133] In the illustrated embodiment, the busbars 110, 120 overlap each other essentially completely in the overlapping area. The busbars 110, 120 have essentially the same width 122. The narrow edges 114 are essentially flush with each other.

[0134] In the end section 130 of the two busbars 110, 120, these each have a reduced width extension 122. In particular, the width extension 122 of the end sections 130 of the busbars is less than half the width extension 122 in the overlap region 140.

[0135] The first busbar 110 comprises a connection element 104, and the second busbar 120 comprises a connection part 105. The connection elements 104, 105 are arranged in a part of the end region 130. The connection elements 104, 105 are formed as sleeves, each of which is arranged in an opening of the respective busbar 110, 120. The connection part 104 of the first busbar 110 protrudes beyond the broad side 112 of the busbar 110. The connection part 105 of the second busbar 120 is countersunk into the opening of the busbar 120. Screws 102 are arranged in the connection elements 104, 105.

[0136] It can also be seen that the busbars 110, 120 each have a side recess 106. This is hook-shaped. In particular, the edge of the side recess 106, which faces the front end of the busbars 110, 120, is at least partially steep, in particular substantially perpendicular to the outer side 117 of the busbar 110, 120, into the broad side 112 of the busbar 110, 120. The edge of the side recess 106, which faces the overlapping area of the busbars 110, 120, is less steep, in particular at a shallow angle to the outer side 117 of, for example, 45 degrees or less, into the broad side 112 of the busbar 110, 120.

[0137] The end of the busbars is rounded. The end face 115 is therefore not a flat surface but rather a curve. This allows the busbars to be inserted into a suitable receiving environment with less resistance.

[0138] The second busbar 120 is curved. In the illustrated embodiment, the busbar 120 is curved in an S-shape. In particular, the front end of the end section 130 of the busbar 120 has the substantially same orientation of the broad side 112 as in the overlap region 140.

[0139] Due to the bending of the second busbar 120, the end sections 130 of the two busbars 110, 120 lie essentially in one plane. In particular, the connection elements 104, 105 arranged in the busbars 110, 120 can also lie in one plane.

[0140] The busbars 110, 120 can each be at least partially insulated. In particular, an insulation layer 118 can be arranged on parts of the surface of the busbars 110, 120. In the overlap region 140, the busbars can be substantially completely insulated. The busbars 110, 120 can also be stripped in parts of the end section 130. Stripping is shown at the front ends of the busbars, which in particular accommodate the connection elements 104, 105. The insulation 118 is also removed on the inner sides 116.

[0141] The connecting part 100 further comprises a seal 160. As shown, the seal can enclose the busbars 110, 120 individually or together. The seal 160 can have cross-sectionally adapted openings for the busbars 110, 120. Several ribs can be seen on the seal 160. These ribs are arranged around the outer circumference of the seal 160.

[0142] It can also be seen that the seal has a lip 162. The lip 162 is arranged between the busbars 110, 120. In particular, the lip 110, 120 is arranged between the broad sides and extends substantially parallel to the broad side 112 of at least one of the busbars 110, 120 in the direction of the end section 130 and / or end of the busbars 110, 120. The lip 162 can project beyond the remaining seal 160 in the direction of the end and / or the connection element 104, 105 of at least one of the busbars 110, 120. The lip 162 can serve as a spacer. In particular, the curved second busbar 120 can bear against at least parts of the lip 162, in particular against parts of the narrow-section-side end region of the lip 162.

[0143] Also on Fig. 1 a housing 150 can be seen. The housing 150 has, in particular, two sections 150.1, 150.2. The sections 150.1, 150.2 can together form an opening for the two busbars 110, 120.

[0144] The sections 150.1, 150.2 are connectable to one another. In particular, a section 150.2 has at least one plug-in projection 154, and a section 150.1 has at least one plug-in receptacle 156. In particular, each of the sections has both a plug-in receptacle 156 and a plug-in projection 154. These can each be arranged on opposite broad sides 112 of the stacked busbars 110, 120.

[0145] The plug-in projection 154 can be inserted into the plug-in receptacle 156. In particular, the plug-in receptacle 156 is cross-sectionally adapted to the plug-in projection 154. The plug-in projection 154 and the plug-in receptacle 156 extend along an extension direction which runs in particular parallel to the broad side of the busbar and / or perpendicular to the longitudinal axis of at least one of the two busbars.

[0146] The plug-in projection 154 and / or the plug-in receptacle 156 can be arranged on the side of the housing 150 facing the overlap region, as shown.

[0147] The plug-in projection 154 can have a raised portion 155 along the plug-in direction. The raised portion 155 can be web-shaped, as shown. The raised portion 155 can extend along the plug-in direction. The plug-in receptacle 155 can have a corresponding groove for receiving the raised portion 155.

[0148] The housing 150, in particular at least one of the housing parts 150.1, 150.2, can have a raised portion 158 on the inner circumferential surface. The raised portion 158 can be shaped as a web-shaped raised portion 158, in particular a circumferential web-shaped raised portion 158. The raised portion 158 can engage between at least two of the ribs of the seal 160.

[0149] Fastening means 152 can be arranged on the housing 150. Fastening means 152 can be arranged on each of the sections 150.1, 150.2. For example, the fastening means can comprise screws, as shown. At least one screw can be guided through a hole in the housing 150. In particular, the screw can be arranged on the housing in a captive manner.

[0150] A connector housing 210 may be provided next to the housing 150. This may include fastening means 212. The fastening means of the housing 150 may be attachable to the fastening means 212 of the connector housing 210. For example, as shown, the connector housing 210 may have holes as fastening means into which screws 152 of the housing 150 can be screwed.

[0151] The housing 150 can have a greater extension in the longitudinal axis of at least one of the busbars 110, 120 than the seal 160 in this direction. The seal 160 can be completely enclosed by the housing 150.

[0152] The housing 150 can have a larger cross-section in the area facing the end section 130 than in an area facing the overlap region 140. In particular, a circumferential gap can be left free between the busbars 110, 120 and / or between the seal 160 and the housing 150. A lateral surface 214 of the connector housing 210 can be inserted into this gap. In particular, the lateral surface 214 can contact the seal 160. This enables a watertight, gas-tight, and / or pressure-tight connection between the housing 150 and the connector housing 210.

[0153] The busbars 110, 120 can be inserted into the housing 210 in a watertight, gas-tight and / or pressure-tight manner.

[0154] Fig. 2 shows a further embodiment of the present connecting part according to an embodiment.

[0155] The busbars 110, 120 run parallel to each other. The busbars 110, 120 are partially bent in the overlapping area 140. In the end section 130, however, both busbars 110, 120 are guided straight along a common longitudinal axis. The end section can be Fig. 1 with a curved busbar 120 shorter.

[0156] Since the busbars 110, 120 are not bent, the end sections of the respective busbars 110, 120 are spaced apart from one another by a height offset along the surface normal to at least a part of the broad side 112 of at least one of the busbars.

[0157] Connecting sleeves 106, 107 can serve to compensate for the height offset. The connecting sleeves 106, 107 extend in a direction of extension, which in the illustrated case is essentially perpendicular to the broad side of the respective end sections of the busbars 110, 120. The ends of the connecting sleeves 106, 107 facing away from the end sections are located essentially at the same position along the direction of extension of at least one of the connecting sleeves 106, 107.

Claims

1. Connection part comprising - at least two busbars, wherein a broad face of a first of the at least two busbars overlaps with a broad face of a second of the at least two busbars in an overlap region of the at least two busbars, and the longitudinal axes of the at least two busbars runs substantially parallel to one another in at least parts of the overlap region, and - the at least two busbars open into a common end portion with their corresponding end portions different from the overlap region, and - at least one connection element arranged in each case on one of the at least two busbars in the end portion of the busbar, the connection elements of the at least two busbars being spaced apart from one another, - a width of the end portion of at least the first busbar being reduced in relation to a width of the first busbar in at least parts of the overlap region in such a way that the connection element of the second busbar is free of overlap by the end portion of the first busbar characterized in that - at least one seal surrounds at least one of the at least two busbars.

2. Connection part according to any of the preceding claims, characterized in that - a width of the end portion of the second busbar is reduced in comparison with a width of the second busbar in at least parts of the overlap region in such a way that the connection element of the first busbar is free of overlap by the end portion of the second busbar.

3. Connection part according to any of the preceding claims, characterized in that - the end portion of at least one of the busbars is arranged eccentrically relative to the central axis of the busbar in at least parts of the overlap region and / or a one-sided recess of the busbar forms the reduction in the width of the end portion.

4. Connection part according to any of the preceding claims, characterized in that - the narrow faces of the at least two busbars terminate in a substantially flush manner in the direction of the surface normal to at least one of the broad faces of at least one of the busbars at least in the overlap region, and / or - the end faces of the at least two busbars are arranged along the longitudinal axis of at least one of the busbars at substantially the same position.

5. Connection part according to any of the preceding claims, characterized in that - at least two of the at least two busbars in the end portion have a smaller distance from one another along a surface normal to at least one broad face of at least one of the busbars than in the overlap region, in particular in that the end portions of at least two of the busbars are at least partially located in a plane.

6. Connection part according to any of the preceding claims, characterized in that - at least one of the busbars is provided with a side recess, in particular in an end portion, in particular in an outer face of the busbar.

7. Connection part according to any of the preceding claims, characterized in that - the at least two of the connection elements are arranged substantially at the same position along the longitudinal axis of at least one of the at least two busbars and / or - at least one of the connection elements is arranged substantially on the central axis of the end portion of the corresponding busbar or - in that at least one of the connection elements is arranged substantially eccentrically with respect to the central axis of the end portion of the corresponding busbar.

8. Connection part according to any of the preceding claims, characterized in that - the connection element is formed as a connection bolt and / or in that the connection element is formed as a sleeve.

9. Connection part according to any of the preceding claims, characterized in that - at least one of the connection elements tapers in an extension direction toward an end face of the connection element facing away from the busbar.

10. Connection part according to any of the preceding claims, characterized in that - at least one of the at least two connection elements has a through-hole, in particular in the direction of the surface normal to at least parts of the broad face of the busbar.

11. Connection part according to any of the preceding claims, characterized in that - at least one connecting sleeve is connected to at least one of the connection elements, in particular with a force fit, with a form fit and / or in a material-locking manner, for example by means of a screw, in particular the length of the at least one connecting sleeve substantially corresponding to the vertical offset of the end portions of the at least two busbars, and / or - in that at least two connecting sleeves are in each case connected to a connection element, in particular with a force fit, with a form fit and / or in a material-locking manner, for example by means of a screw, in particular the difference in length of the at least two connecting sleeves substantially corresponding to the vertical offset of the end portions of the at least two busbars.

12. Connection part according to any of the preceding claims, characterized in that - the at least one seal surrounds the at least two busbars together and / or individually, preferably - at least one of the at least one seal is formed from silicone, rubber, and / or a plastics material, in particular in that the housing and the seal are injection molded and / or cast together, in particular in a two-component injection molding process and / or preferably - at least one of the at least one seal has at least two, preferably three or more ribs.

13. Connection part according to any of the preceding claims, characterized in that - the housing surrounds at least one of the at least two busbars with at least one busbar opening, the busbar opening preferably being adapted in cross section to the busbar, the housing in particular comprising at least two partial pieces that jointly form at least one busbar opening adapted in cross section to at least one of the busbars, preferably - at least one of the at least two partial pieces can be plugged onto at least one of the at least two busbars substantially perpendicular to the longitudinal axis of the at least two busbars and / or substantially parallel to the broad face of at least one of the busbars, in particular starting from the narrow face of at least one of the busbars and particular preferably - at least one of the at least two partial pieces has a plug projection and / or at least one of the at least two partial pieces has a plug receptacle, in particular the plug projection being insertable into the plug receptacle, in particular being insertable substantially perpendicular to the longitudinal axis of at least one part of at least one of the at least two busbars, and / or - in that at least one fastening means is arranged on at least one of the at least two partial pieces, which fastening means connects the at least two partial pieces to one another, in particular a force-fitting and / or form-fitting fastening means, in particular at least one screw and / or at least one thread.

14. Plug having - a plug housing, - a connection part according to any of the preceding claims, the at least two busbars being guided in each case with one end portion into the plug housing and the housing of the connection part contacting the plug housing in a region that surrounds the busbars, preferably indirectly via a seal that is preferably arranged in a press fit between the housing of the connection part and the plug housing and preferably - at least one fastening means is arranged on the connection part, in particular on the housing of the connection part, and / or the plug, in particular the plug housing, in particular a force-fitting and / or a form-fitting fastening means, in particular at least one screw and / or at least one thread.

15. System having a connection part according to claim 1-13 and a plug according to claim 14.