WO2023148246A1

WO2023148246A1 - Connector for a supply cable

Info

Publication number: WO2023148246A1
Application number: PCT/EP2023/052504
Authority: WO
Inventors: Martin Schmidt; Hannes Kahlhammer; Georg Wallensteiner
Original assignee: Robert Bosch Gmbh
Priority date: 2022-02-03
Filing date: 2023-02-02
Publication date: 2023-08-10

Abstract

Connector (14, 15) for a supply cable (10), the connector (14, 15) having: - a housing (20) with at least a first housing shell (21) and a second housing shell (22), - at least one connection unit (23), which is arranged in the housing (20) on a connection side (27) of the housing (20), for connection to a vehicle (12), an energy supply device (16) or a consumer (19) along an axial direction (A), - wherein a blocking element (30) is arranged on an outer side (29) of the connection unit (23) and is designed to interact with a first mating blocking element (31) on a first inner side (51) of the first housing shell (21) and/or with a second mating blocking element (32) on a second inner side (52) of the second housing shell (22) in such a way that rotation of the housing (20) along a circumferential direction (U), which runs around the axial direction (A), relative to the connection unit is prevented, and/or - wherein a recess (71) is arranged in a wall (70) of the connection unit (23), extends in a radial direction (R), which is perpendicular to the axial direction (A), and is designed to receive a first projection (61), which is arranged on the first inner side (51) of the first housing shell (21), and/or a second projection (62), which is arranged on the second inner side (52) of the second housing shell (22).

Description

title

Connector for a power cable

field of invention

The invention relates to a connector for a supply cable for electrically connecting a vehicle to an energy supply device that provides electrical energy and/or to a consumer that requires electrical energy. The invention also relates to a supply cable with such a connector.

State of the art

Various approaches are known from the prior art for the electrical charging of electric vehicles or hybrid vehicles (eg cars, trucks, boats, aircraft, two-wheelers, etc.). In a first charging situation, the vehicle can be charged via a dedicated charging infrastructure, in particular permanently installed charging stations. For example, such charging stations are implemented as charging stations or wall boxes. In an alternative charging situation, a permanent current socket is provided, as is used for example in normal households for the energy supply. For example, this is a (eg 230V) Schuko socket or a socket designed according to other regional standards or customs, in which case a three-phase current connection can also be provided. In this case, a connection line of the charging cable usually has an integrated controller, which is also called an in-cable control box, ICCB, and which is arranged between the two connectors inside the connection line. This integrated controller is used for communication with the vehicle and for enabling and setting a charging current, since a shockproof socket, unlike a charging station or a wall box, does not usually have a communication line that the vehicle can use to communicate with the energy supply device. Such a charging or an energy transfer can be made possible by a supply line or a supply cable, which is commonly referred to as a charging cable. Such a supply cable or such a supply line usually has a connector (often commonly referred to as a charging plug) at each of its two ends, one of which is connected to the vehicle (primary connector—often a charging plug (male connector), more rarely a female connector). and the other is electrically connected to the energy supply device or a consumer (secondary connector--this can be designed as a (charging) plug or socket, for example) (the consumer can also be another vehicle). A connecting line through which the electric current flows is arranged between the two connectors.

Such connectors often include a housing. A connection unit is often arranged inside the housing or on the housing on a connection side or on a connection end (which can be connected to the vehicle or the energy supply device or the consumer, for example). This can, for example, serve as an infrastructure connection or as a vehicle connection as a mechanical interface to a mating connection of the respective connection partner (e.g. vehicle connection or infrastructure connection designed as a plug, mating connection as a socket). Accordingly, the connection unit has a defined geometry facing the mating connection or the outside environment (e.g. a type 2 plug face or a three-phase plug face, etc.).

Such connectors are known from EP 3 511 198 A1 and from DE 196 50 097 A1.

Disclosure of Invention

The invention is based on the finding that, for reasons of sustainability, a connector should preferably be particularly easy to assemble and disassemble, e.g. for repair purposes, and that such a connector should be as light as possible and the housing should therefore preferably have a hollow interior. Furthermore, the invention is based on the finding that the connector can be exposed to increased mechanical loads by the user during use. Usually, during an energy transfer process (e.g. charging the vehicle using the supply cable), the connection unit of the connector is fixed in the mating connection (e.g. by means of a frictional connection) and sometimes even mechanically locked and can therefore not be removed unintentionally. The design of the connection unit (as an infrastructure connection or vehicle connection) and counter-connection - possibly together with the locking - provides a connection, e.g. a fixed, rigid connection.

It can happen, for example, that a user intentionally (e.g. by shaking the connector to check the connection) or unintentionally (e.g. when stumbling over the supply line) exerts a force on the housing (so-called "mishandling"), which e.g acts essentially parallel to the plug-in direction, but e.g. essentially perpendicular to the plug-in direction or as a rotary movement around the plug-in direction. Such mechanical effects on the housing, particularly in the case of connectors that do not have a completely one-piece housing including the connection unit, can undesirably result in the housing being displaced relative to the connection unit in the area of the connection unit and causing the connection unit and housing to gape open at the transition housing and/or gaps.

This problem can be avoided or reduced for connectors in which the housing is made in one piece by overmoulding the connection unit and the line section with plastic, as is widely known from the prior art, for example, for the infrastructure-side connectors of chargers for mobile phones . An alternative or additional possibility consists in pouring out (potting) or foaming the interior of the housing. However, this makes a connector of this type very heavy, since a large volume has to be filled with the injection molding material and/or foam material (eg a thermoplastic and/or duroplastic material). The costs are also a result of the high material consumption of plastic therefore comparatively high. In addition, such a connector is almost irreparable if a defect occurs inside. As a result, in such a case with the defective connector, the entire supply cable often becomes unusable, which contradicts the desire for sustainable products.

There may therefore be a need to provide a connector for a supply cable that is simple and inexpensive to manufacture, that is as small as possible, that is lightweight, in particular has a hollow housing interior, that is inexpensive and easy to repair and in which the housing also in the event of so-called mishandling, in particular when connected to a mating connection, no (permanent) gaps form and it is also not damaged, e.g. by housing parts being permanently out of place relative to the connection unit or by cracking in the housing. In particular, there may be a need that the connector is not damaged and that there is no permanent displacement between the connection unit and the housing when it is exposed to forces of 200N, preferably 300N, particularly preferably 400N and very particularly preferably 500N in one Direction essentially (+/- 30°) perpendicular to the plug-in direction and/or essentially (+/- 30°) perpendicular to a handle section or grip area of the housing and/or in a direction surrounding the plug-in direction.

Advantages of the Invention

This need can be met by the subject matter of the present invention according to the independent claims. Advantageous embodiments of the present invention are described in the dependent claims.

According to a first aspect of the invention, a connector for a supply cable for electrically connecting a vehicle to an energy supply device that provides electrical energy and/or to a consumer that requires electrical energy is proposed.

The connector has a housing with at least a first housing shell and a second housing shell and at least one connection unit arranged in the housing on a connection side of the housing for connection to the vehicle or the energy supply device or along the consumer an axial direction, which, depending on the design of the connector, can also be referred to as the plug-in direction.

Provision can be made, for example, for the second housing shell to be designed separately from the first housing shell.

It is provided that a blocking element is arranged on an outside of the connection unit, which is set up to interact with a first counter-blocking element on a first inside of the first housing shell and/or with a second counter-blocking element on a second inside of the second housing shell in such a way that rotation of the housing is prevented along a circumferential direction surrounding the axial direction relative to the terminal unit.

For example, it can be provided that a rotation of more than 8°, preferably more than 5° and particularly preferably more than 3°, is prevented. It can be provided, for example, that such twisting is prevented when the force on the housing is up to 200N, preferably up to 300N, particularly preferably up to 400N and very particularly preferably up to 500N, while the connection unit is fixed, e.g. at a counter connection.

This has the advantageous effect that the housing can be designed so that it can be assembled or disassembled easily and inexpensively. At the same time, the advantageous effect is that when a force acts on the connector or on the housing, without a locking element and first or second counter-locking element, the housing or the first housing shell and/or the second housing shell is displaced or displaced relative to the connection unit (which is eg fixed in or on a counter-connection), this displacement or displacement or twisting along the direction of rotation is effectively prevented. This has the further advantageous effect that, for example, lines or cables inside the housing are not damaged or sheared off as a result of such a displacement, for example transversely to a grip section of the housing, or as a result of twisting about the plug-in direction. This also advantageously prevents the housing or the first housing shell and/or the second housing shell from opening up or cracks from forming as a result of such a relative movement around the connection unit, particularly if the cross section of the connection element is not completely round eg would be possible in particular at points with a variable radius. This advantageously increases the service life of the connector and advantageously improves the sealing of the interior of the housing. The interior space can, for example, be essentially hollow. Apart from the cables or lines and possibly at least one electronic circuit, for example, it can be essentially empty, in particular not foamed or sprayed with plastic.

Furthermore, it is advantageously not necessary to provide one or more fastening means (such as screws, rivets or the like) to prevent this gaping or twisting between the housing and the connection unit, which fix the first and/or second housing shell to the connection unit (e.g. by a screw or rivet connection or the like). An adhesive connection between the housing and the connection unit can also advantageously be dispensed with. As a result, the assembly process and disassembly process of the connector can advantageously be effected simply, quickly and inexpensively.

It goes without saying that the connector can have exactly one blocking element. However, it can also have a plurality of, for example, two, three, four, five, six or more blocking elements.

In the same way, the first housing shell can have precisely one first counter-locking element or a plurality of first counter-locking elements.

In the same way, the second housing shell can have exactly one second counter-locking element or a plurality of second counter-locking elements.

Furthermore, it can be provided, for example, that exactly one first counter-blocking element and/or exactly one second counter-blocking element is provided for each blocking element. In alternative embodiments it can be provided that a blocking element interacts or can be coupled with a plurality of first and/or second counter-blocking elements.

It is also possible that a single first (or second) counter-locking element interacts or can be coupled or is coupled with a plurality of locking elements. It can also be possible that a blocking element, which is located eg in a section where the first housing shell and the second housing shell meet, can be coupled or interacts with both a first counter-blocking element and a second counter-blocking element.

Provision can be made for at least one sealing means or sealing element to be arranged between the first housing shell and the second housing shell. It can be provided, for example, that a further sealing means or a further sealing element is arranged on the connection unit. Provision can be made for the sealing means and the further sealing means to be coupled to one another at least in sections. As a result, a preferably hollow interior of the housing can advantageously be sealed against dirt, dirt, moisture and--in general--fluid media from an external environment of the connector.

Alternatively or additionally, it is provided that a recess is arranged in a wall of the connection unit, which extends in a radial direction perpendicular to the axial direction and which is configured to have a first projection, which is arranged on or on or in the first inner side of the first housing shell is and / or a second projection, which is arranged on or on or in the second inner side of the second housing shell to receive.

This has the advantageous effect that when a force acts on the housing, in particular in a radial direction perpendicular to the axial direction, a gaping of the housing and/or the formation of cracks on the connection side is effectively prevented. This is because the projection engaging in the recess or the projection received in the recess anchors the housing or the first housing shell and/or the second housing shell on or in the connection unit. This prevents one or both housing shells from slipping off the connection unit if a user shakes the connector while the connector is fixed or even locked in or on the mating connection This advantageously avoids the area of the connection unit. This advantageously brings about more reliable sealing of the interior of the housing and a longer service life of the connector. Furthermore, advantageously, a wall thickness of the housing shells can be chosen to be smaller, whereby the connector becomes lighter with the same robustness and can be manufactured more cost-effectively and sustainably.

The advantages described apply both to the application of force transverse to the axial direction (e.g. shaking the connector up and down or to the left and right on the connector) and to the application of force along the axial direction or the plug-in direction (e.g. if an attempt is made to remove a connector fixed or even locked on the mating connection from the mating connection).

Furthermore, it is advantageously not necessary to provide one or more connecting means (e.g. screws, rivets, etc.) to prevent this gaping, which connect the first and/or second housing shell to the connection unit. Other connecting means such as e.g. gluing can also be dispensed with, as a result of which the assembly process and disassembly process of the connector can be effected more simply and cost-effectively.

It goes without saying that the wall of the connection unit can have exactly one single recess.

However, the wall can also have a plurality (e.g. two, three, four or even more) of recesses. If a plurality of recesses is provided, it can be provided, for example, that these are spaced apart from one another. It can be provided, for example, that the recesses do not cross. It can be provided, for example, that the recesses run parallel to one another. For example, they can be arranged on opposite sides of the connection unit (e.g. at a top and a bottom end).

The recess can, for example, be in the form of a ditch. For example, it may extend from one side of the wall to the opposite side.

The first projection and the second projection can, for example, be arranged together in a single recess. However, it can also be provided that in the recess only a first projection or only a second projection is received.

It can be provided that exactly one single first or second projection is provided. However, a plurality of first or second projections can also be provided. If a plurality of first or second projections is provided, it can be provided, for example, that the first projections are spaced apart from one another and/or that the second projections are spaced apart from one another.

It can be provided that, for example, two first projections are provided, which are accommodated in two different recesses (or three or four, etc. first projections are accommodated in three or four, etc. different recesses).

In the context of this application, the term “comprise” is used synonymously with the term “have” unless otherwise stated.

In a further development it is provided that the blocking element and the first counter-blocking element are formed in a form-fitting manner with respect to one another.

Alternatively or additionally, it is provided that the blocking element and the second counter-blocking element are formed in a form-fitting manner with respect to one another.

This results in a particularly simple and cost-effective anti-twist device. In addition, a certain amount of play can advantageously be made possible in this way, which, for example, enables the connection unit to be installed in the housing even with manufacturing tolerances and/or which prevents mechanical stresses in the event of temperature fluctuations if, for example, the connection unit and the housing shells have different thermal expansion coefficients.

It goes without saying that the blocking element and the first or second counter-blocking element can in principle also be designed to be coupled to one another in a frictionally or force-fitting manner or can be coupled. In a further development it is provided that the locking element is designed as a locking element groove and the first counter-locking element or the second counter-locking element is designed as a projection.

The blocking element groove can be incorporated into the wall of the connection unit, for example. For example, it may be formed as an indentation along the radial direction.

Alternatively or additionally, it is provided that the locking element is designed as a locking element projection and the first counter-locking element or the second counter-locking element is designed as a groove.

As a result, an anti-rotation lock that is particularly easy to produce (e.g., can be produced by an injection molding process and can be safely demoulded) and installed is advantageously formed, which reliably prevents relative displacement between the connection unit and the first or second housing shell.

The locking element projection can, for example, protrude from the wall of the connection unit. For example, it can protrude from the wall along the radial direction.

In a further development it is provided that the outside of the connection element has at least one flat first section viewed in cross section, with a second section of the outside in cross section outside of the first section corresponding to a circular segment or an oval segment.

The first section can, for example, extend over an angle in the range between 20° and 80° when viewed in the circumferential direction.

For example, it can be provided that the cross section of the outside has (only) the first section and the second section or consists only of the first section and the second section.

This advantageously provides a clear plug-in position, so that polarity reversal when coupling the connector and mating connection is reliably avoided and a user immediately recognizes how the connector is connected to the mating connection pair is. Furthermore, the design of the connector advantageously prevents the housing from gaping open when the housing is displaced relative to the connection unit (e.g. a rotary movement of the housing, etc.), in particular at the transition from the first section to the second section, since there is a large change in the radius here of the cross section takes place. For example, such a connection unit can be designed as a connection unit for a type 2 connector or for a type 2 mating connection or for a so-called combo plug or the like.

In a further development it is provided that the first projection is positively coupled to the recess.

Alternatively or additionally, it is provided that the second projection is positively coupled to the recess.

This advantageously brings about a particularly simple, cost-effective and robust connection between the connection unit and the first and/or second housing shell, which prevents the housing from opening up or suppresses the formation of a gap and which also prevents the formation of cracks. Forces acting on the housing can thus advantageously be introduced from the first and/or second projection into the recess and thus into the connection unit. This advantageously permanently ensures the seal between the connection unit and the housing, the safety of the connector for a user is advantageously improved and the service life of the connector is advantageously increased.

Furthermore, the positive coupling of the recess and the first and/or second projection can advantageously result in a further improved sealing of the interior space, since the recess and the first or second projection advantageously increase the sealing distance from the outside environment into the interior space in the manner of a labyrinth seal.

In a further development it is provided that the recess has an opening pointing radially outwards. The recess can be designed, for example, at least in sections, like a ditch, which is designed to be open on its upper side (in contrast to a channel that is closed circumferentially along the direction of extent). The recess can, for example, be open at one of its ends or at both ends along the direction in which it extends.

The recess has the opening in particular along at least 50%, preferably at least 75% and particularly preferably along the entire extent of the recess.

This advantageously brings about a particularly simple and cost-effective production of the connection unit and of the first and/or the second housing shell—the recess can be removed from the mold in a particularly simple manner in an injection molding process. Also advantageously, a particularly uniform force distribution along the recess onto the first and/or second housing shell is effected in this way. This is because the first or second projection, when it is arranged in the recess, can be connected to the first or second housing shell along the entire length of the extension of the first or second projection. As a result, force peaks from the first or second projection into the first or second housing shell are advantageously avoided.

It can be provided, for example, that the first projection and/or the second projection can be inserted into the recess in an insertion direction perpendicular to the opening.

This can advantageously bring about a particularly simple and secure installation.

In a further development it is provided that in a cross section a diameter of the opening is smaller than the largest diameter of the recess, in particular by at least 5% smaller.

This prevents a force acting on the housing from causing a relative displacement between the housing and attachment in a particularly safe and reliable manner. closing unit leads. In particular, this design of the cross section of the opening makes it more difficult or prevents the first or second projection from slipping out or jumping out of the recess. This advantageously permanently ensures the tightness between the connection unit and the housing and also prevents the formation of cracks in the housing. The safety of the connector for a user is also advantageously increased. This also advantageously increases the service life of the connector.

In a further development it is provided that the first projection and/or the second projection have a hollow through-channel which runs parallel to the recess.

This has the advantageous effect that the first projection and/or the second projection can be used, for example, for passing a connecting means such as a rivet, a screw or the like. The first and/or second projection can thus be designed, for example, as a screw dome or screw dome or rivet dome or rivet dome, etc. Such a connecting means can be used, for example, to permanently couple the first housing shell to the second housing shell, e.g. without a gap and tightly.

A particularly smooth outer contour of the housing can also advantageously be brought about as a result, since the first and second projections are arranged on the first and second inner side, respectively.

Furthermore, the provision of such a hollow through-channel can advantageously have the effect that a coupling of the first housing shell and the second housing shell (e.g. by means of a screw or a rivet, etc.) is made possible without sealing the interior of the housing from the outside environment of the connector affect. This is because the hollow through-channel is advantageously closed all around along its circumferential direction (circumferentially extending in its direction). If the first and second projections meet in the interior of the housing, a single sealing element between the two projections can ensure sealing in a simple manner, for example. When providing a screw connection or a rivet connection, etc. through the through-channel, it can also be provided, for example, alternatively or additionally, that the two are on top of each other facing faces of the first projection and second projection are pressed together and in this way a sufficient sealing effect is achieved without additional sealant or sealing element. Provision can also be made, for example, for sections of the first projection to be accommodated in the through-channel of the second projection (or vice versa), so that a sealing effect can also be achieved in this way.

In a further development it is provided that the recess, viewed in the axial direction, is at a distance from a first end face of the first housing shell and/or from a second end face of the second housing shell.

For example, the spacing may be at least 0.5 cm, preferably at least 1 cm, and most preferably at least 2 cm.

This advantageously brings about a particularly stable coupling between the connection unit and the first housing shell and/or the second housing shell. If, for example, in a state in which the connector is fixed to the mating connection by means of the connection unit, a force is exerted in the gripping section or gripping area of the housing, which acts essentially perpendicularly to a direction of extent of the recess (e.g. a downward force in the case of a connector fixed on the vehicle , toward the floor), the housing (first and/or second housing shell) is supported on the connection unit in the area of its lower end face of the connection side. This support point acts as a kind of fulcrum around which the housing is twisted relative to the connection unit due to the force applied. As a result of the action of force, the housing would now have a tendency to gape with respect to the connection unit on its upper end face of the connection side. Due to the coupling of the first and/or second projection with the recess, however, the action of force is introduced into the connection unit, so that the tendency to gape is reduced or eliminated. The farther the recess is from the face, the better a gaping of the housing at the face is prevented or an extent of the gaping is reduced.

Furthermore, a further improved sealing of the interior is advantageously effected by the recess and the first and / or second projection, since the recess and the first or second projection in the manner of a labyrinth seal Advantageously increase sealing distance from the outside environment to the interior.

Due to the spacing from the end face, this sealing section is particularly advantageously further increased.

In a further development it is provided that the recess runs parallel to the (flat) first section.

This advantageously reliably prevents a gaping in the first (flat) section, even in the case of manufacturing tolerances in the housing shells and/or the connection unit.

According to a second aspect of the invention, a supply cable is proposed for electrically connecting a vehicle to an energy supply device that provides electrical energy and/or to a consumer that requires electrical energy.

The supply cable has a connector as described above. It also has a connecting line which is electrically connected or can be connected to the connector. It can furthermore have a further connector which is arranged or can be arranged at another end of the connecting line.

As a result, a particularly inexpensive, lightweight, easy to manufacture, easy to repair, stable and reliable charging cable is advantageously provided.

drawings

Further features and advantages of the present invention will become apparent to those skilled in the art from the following description of exemplary embodiments, which, however, are not to be construed as limiting the invention, with reference to the accompanying drawings.

Show it:

Fig. 1: a schematic representation of a supply cable; Figure 2a is a schematic side view of a connector coupled to a mating terminal;

Fig. 2b: a schematic plan view of a connector with a

mating connection is coupled;

Fig. 3: a schematic exploded view of a connector of

supply cable;

4 shows a schematic perspective view of a connector with a separated second housing shell;

5 shows a schematic perspective rear view of the connection unit;

FIG. 6 shows a detail of the connection unit from FIG. 5; FIG.

7 shows a schematic longitudinal section through a connector;

Fig. 8: a detail of the connection unit from Fig. 7.

FIG. 1 schematically shows a vehicle 12 which is, for example, a hybrid or electric vehicle and which has an energy store 11 . The energy store 11 is to be charged here, for example via an energy supply device 16 . The energy supply device 16 in the case shown in Figure 1 can be, for example, a wall box that enables charging with three-phase AC voltage, or a constant voltage source, for example a household socket such as a Schuko socket, for example, which enables single-phase charging. A supply cable 10 is provided for connecting energy supply device 16 and energy store 11 or vehicle 12 .

The supply cable 10 has a primary connector 14 and a secondary connector 15, different variants of the secondary connector 15 being shown in FIG. In the context of the application, connectors 14, 15 are spoken of in general. In context It is not important in this application whether it is a primary connector 14 or a secondary connector 15 . To make the application text easier to understand, however, the connector 14 , 15 can occasionally be specified more precisely as the primary connector 14 or secondary connector 15 . A supply line or connecting line 13 is present between the (primary) connector 14 and the (secondary) connector 15 . The (primary) connector 14 is used for the electrical connection to the vehicle 12 and specifically to the energy store 11. The (secondary) connector 15 is used, depending on its design, to connect to the various types of energy supply device 16 or a consumer 19. In the case that the (secondary) connector 15 is set up for connection to a consumer 19 (shown here by way of example in the form of a hair dryer), the (secondary) connector 15 can be a Schuko socket, for example. In this case, electrical energy is drawn from the vehicle 12 or its energy store 11 . It goes without saying that the electrical load can also be a power grid, so that electrical energy from the vehicle 12 can be fed back into the power grid. In this case, for example, a Schuko plug or a type 2 charging plug for plugging into a wall box can serve as the (secondary) connector 15 . It is also understood that the electrical load can also be another vehicle that is supplied with electricity or electrical energy from the vehicle 12 . In this case, the (secondary) connector 15 can be designed analogously to the (primary) connector 14, for example.

The (primary) connector 14 has a vehicle connection 4 which is provided for the directly or indirectly detachable wireless or wired electrical connection to the vehicle 12 or the energy store 11 or to a mating connection 8 of the vehicle 12 or the energy store 11 .

In the embodiment shown, the (primary) connector 14 also has an additional connection 5, via which a wireless and/or wired electrical connection with an additional coupling 6 of the connecting line 13 can be made detachable directly or indirectly. In an alternative embodiment, the additional connection 5 and the additional coupling 6 can be dispensed with, so that the connecting line 13 is attached directly to the (primary) connector 14 and cannot be separated from it without destroying it.

In the exemplary embodiment shown, the supply cable 10 can be coupled to various types of (secondary) connectors 15 . Each (secondary) connector 15 has a Infrastructure connection 1 and a cable connection 2, the infrastructure connection 1 being designed for the electrical connection to the energy supply device 16 or the consumer 19 or for the electrical connection to a mating connection 8 of the energy supply device 16 or the consumer 19. The cable connection 2 is used for connection to the connecting line 13. For this purpose, the connecting line 13 has, for example, a coupling 3, with the coupling 3 and the cable connection 2 being electrically connectable in a detachable manner. The (secondary) connectors 15 can thus be exchanged easily and with little effort, in that only the connection between the coupling 3 and the cable connection 2 has to be separated. In principle, of course, supply cables 10 are also conceivable in which the (secondary) connector 15 is non-detachably (ie not detachably detachable) connected to the connecting line 13 .

In Figure 1 at the top right it is shown that the infrastructure connection 1 can also be designed for connection to a consumer 19, e.g. by the infrastructure connection 1 or the (secondary) connector 15 being designed as a Schuko socket or as a three-phase socket. In Figure 1, center right, it is shown that the infrastructure connection 1 of the (secondary) connector 15 in an alternative embodiment can be, for example, a type 2 connection for connection to a charging station or wall box (here, for example, a current flow from the infrastructure connection 1 to the vehicle 12 or possible away from the vehicle 12 towards the infrastructure connection 1). In Figure 1, bottom right, it is shown by way of example that the infrastructure connection 1 of the (secondary) connector 15 can, in an alternative embodiment, be a safety plug for connection to a household socket (here too, for example, a current flow from the infrastructure connection 1 to the vehicle 12 or from the vehicle 12 way to the infrastructure connection 1 possible). A (secondary) connector 15 for connecting to another vehicle is also possible in principle, but is not shown here.

In this exemplary embodiment, the connecting line 13 has only electrical conductors between the clutch 3 and the additional clutch 6 , which establish an electrical connection between the clutch 3 and the additional clutch 6 . These electrical conductors are, for example, copper conductors or aluminum conductors, or they are made from another material with high electrical conductivity and have electrical insulation. All electrical conductors are combined in one strand, for example, and preferably have a common sheath, which serves as electrical insulation on the one hand and as mechanical protection on the other. None is preferred in FIG active or passive electrical component in the connecting line 13 is provided. All logical components or logic modules (e.g. microprocessors, ASICs, etc.) and in particular active or passive electrical components are either part of the (primary) connector 14 and/or part of the (secondary) connector 15. As a result, the connecting line 13 can advantageously be produced inexpensively become. An ICCB (an in-cable control box) can thus be expressly dispensed with in this exemplary embodiment. As a result, the supply cable 10 can be provided in a cost-effective, compact, simple, space-saving and light-weight manner despite its adaptability shown here (different (secondary) connectors 15 can be optionally coupled). Not having an ICCB reduces the weight, costs and manageability, as well as time-consuming quality checks and stress tests, since it is not necessary to protect the sensitive electronics of the ICCB from being run over by other vehicles, such as trucks. This also advantageously reduces the risk of people stumbling. It goes without saying that in other exemplary embodiments an ICCB can be provided, which is then arranged, for example, within the connecting line 13 .

Figure 2a shows a schematic side view of a connector 14, 15 for a supply cable 10 for electrically connecting a vehicle 12 to an energy supply device 16 providing electrical energy and/or to a consumer 19 requiring electrical energy, the connector 14, 15 here being connected to a mating connection 8 (e.g. as vehicle connection 4 or as infrastructure connection 1).

FIG. 2b shows a schematic top view of a connector 14, 15 which is coupled to a mating connector 8. FIG.

Figures 2a and 2b are described together below.

The connector 14, 15 has (see also Figs. 3 and 4): a housing 20 with at least a first housing shell 21 and a second housing shell 22 (see Fig. 2b) which is separate from the first housing shell 21 in this merely exemplary embodiment. and at least one connection unit 23 arranged in the housing 20 on a connection side 27 of the housing 20 for connection to the vehicle 12 or the energy supply device 16 or the consumer 19 along an axial direction A. The connection or connection between connection unit 23 and vehicle 12, energy supply device 16 or consumer 19 takes place by coupling connection unit 23 and the respective mating connection 8. Connection unit 23 serves as vehicle connection 4 or infrastructure connection 1. In this exemplary embodiment, connector 14 , 15 inserted into the mating connection 8 along the axial direction A, which can also be referred to as the plug-in direction.

A radial direction R runs perpendicular to the axial direction A. A circumferential direction U runs around the axial direction A. A longitudinal direction L corresponds to (and follows) the direction of the housing 20 from the connection side 27 (on which the connection unit 23 is arranged) to the line side 28 (facing the connection line 13). An insertion direction E is described in more detail below in connection with FIG. Here it runs perpendicular to the axial direction A and thus along the radial direction R.

The connector 14, 15 shown here has a curved shape or a shape with a kink. The housing 20 has a handle area 45 . The gripping area 45 or gripping section is formed here, for example, adjacent to the line side 28 . In this exemplary embodiment, the connector 14, 15 can be held particularly easily in the grip area 45, e.g. by a user (e.g. with one hand). The grip area 45 is angled here, for example, in relation to a connection area 46 (adjacent to the connection side 27), e.g. at an angle which is in a range between 10° and 75°, preferably in a range between 12° and 60° and particularly preferably in one Range between 15° and 48°, e.g. around an angle of 45°.

The connection unit 23 projects beyond the housing 20 with a coupling area 80 . In the coupling area 80, the connection unit 23 is coupled to the vehicle connection 4 or infrastructure connection 1 (that is to say to the opposite connection 8). The connection unit 23 is accommodated in an interior area 85 in the interior 40 of the housing 20 .

If the connector 14, 15 is coupled to the mating connection 8, the connection unit 23 is mechanically fixed to the mating connection 8, e.g. frictionally or positively. In addition, it can also be fixed to the mating connection 8 by a locking element in such a way that it is not possible to detach the coupling of the connector 14, 15 from the mating connection 8 until the locking is released.

2a shows a situation in which the connector 14, 15 is coupled to the mating connection 8 and a force is exerted on the housing 20 of the connector 14, 15 in the grip area 45. The mating connection 8 is arranged here, for example, in a wall 9 e.g. of the vehicle 12 or the energy supply device 16 . The direction of force (shown here by arrows labeled +Y and -Y) runs approximately perpendicular to the longitudinal direction L (relative to the grip area 45) and approximately in the plane through the connection area 46, the grip area 45 and the area enclosed between the two angle (this corresponds to e.g. shaking the connector 14, 15 up and down when it is coupled to a vehicle 12 or a power supply 16).

Since the housing 20 protrudes quite far from the fixed connection unit 23, a large force or torque occurs at the transition point between the housing 20 and the connection unit 23, which leads to the formation of a gap between one or both housing shells 21, 22 on the one hand and the Connection unit 23 can lead on the other hand. Furthermore, depending on the exact direction of the force, a force can also act on the housing 20 along the circumferential direction U, which can also lead to the formation of a gap between the first and/or second housing shell 21, 22 and the connection unit 23, particularly if the connection unit 23 is not circular Has cross-section, but has variable radii. Typically, the connector 14, 15 should withstand such forces along the +/-Y direction of at least 200N, preferably at least 300N, more preferably at least 400N, and most preferably at least 500N.

2b shows a situation in which the connector 14, 15 is coupled to the mating connection 8 and in the grip area 45 a force is exerted on the housing 20 of the connector 14, 15. The mating connection 8 is again arranged in the wall 9 . The direction of the force (here by arrows labeled +Z and -Z shown, which correspond to the radial direction R here) runs approximately perpendicular to the longitudinal direction L (relative to the grip area 45) and approximately perpendicular to the plane that is defined by the connection area 46, the grip area 45 and the angle enclosed between the two (This corresponds, for example, to lateral shaking of the connector 14, 15 when it is coupled to a vehicle 12 or a power supply device 16). Since the housing 20 protrudes quite far from the fixed connection unit 23, a large force or torque occurs at the transition point between the housing 20 and the connection unit 23, which leads to the formation of a gap between one or both housing shells 21, 22 on the one hand and the Connection unit 23 can lead on the other hand. Furthermore, depending on the exact direction of the force, a force can also act on the housing 20 along the circumferential direction U, which can also lead to the formation of a gap between the first and/or second housing shell 21, 22 and the connection unit 23, particularly if the connection unit 23 is not circular Has cross-section, but has variable radii. Typically, the connector 14, 15 should withstand such forces along the +/-Z direction of at least 200N, preferably at least 300N, more preferably at least 400N, and most preferably at least 500N.

FIG. 3 shows a schematic exploded view of a connector 14 , 15 of the supply cable 10 .

It is easy to see here that the housing 20 has a hollow interior 40 . A sealing element 24 is arranged between the first housing shell 21 and the second housing shell 22 in order to seal the interior space 40 from an external environment 41 of the housing 20 .

In the sealing concept shown here, a connection unit sealing element 25 running around the connection unit 23 along the circumferential direction U can also be seen. Furthermore, a line element sealing element 26 encircling the line element 17 can be seen. The interior space 40 effectively sealed against the ingress of dirt, dirt, moisture, splashing water and, in general, fluid media from the external environment 41 .

The outer side 29 of the connection element 23 has, viewed in cross section, at least one flat first section 75 which (here as an example: viewed in the circumferential direction U) extends over an angle in the range between 20° and 80°, with a second section 76 on the outer side in the Cross-section outside of the first section 75 here corresponds to a circle segment, but can also correspond to an oval segment. The outside 29 consists here, for example, only of the first section 75 and the second section 76.

A recess 71 is arranged in a wall 70 of the connection unit 23 (here, for example, in the inner region 85), which extends in a radial direction R perpendicular to the axial direction A (the direction of insertion E) and which is designed to have a first projection 61, which the first inner side 51 of the first housing shell 21 is arranged and/or a second projection 62, which is arranged on the second inner side 52 of the second housing shell 22.

The recess 71 here runs parallel to the first section 75.

The connection unit 23 has two recesses 71 here, merely by way of example (see also FIG. 7). The two recesses 71 are arranged on opposite sides with respect to the axial direction A.

In this exemplary embodiment, both recesses 71 are spaced apart from a first end face 81 of the first housing shell 21 and from a second end face 82 of the second housing shell 22, viewed in the axial direction A, in particular by at least 1 cm, preferably by at least 2 cm.

The recess 71 visible here has an opening 72 pointing radially outwards. In other words: the recess 71 is formed here like a ditch that does not have a circumferentially closed wall. The first projection 61 and/or the second projection 62 can, for example, be inserted into the recess 71 along or in the insertion direction E perpendicular to the opening 72. Onto this (Over)stretching of the first housing shell 21 and/or the second housing shell 22 when mounting the first and/or second housing shell 21, 22 on the connection unit 23 can advantageously be avoided in this way. The assembly of the first and/or second housing shell 21, 22 with the connection unit 23 can thus take place essentially perpendicularly to the axial direction A. At the same time, this also prevents a relative displacement along the axial direction of the first and/or second housing shell 21, 22 of the connection unit in the assembled state, without a screw connection being required for this, for example.

In this exemplary embodiment, there are two first protrusions 61 and two second protrusions 62 . The two first projections 61 are arranged on opposite sides of the first half shell 21 (on both sides of the axial direction A). The two second projections 62 are arranged on opposite sides of the first half shell 22 (on both sides of the axial direction A).

Both first projections 61 are configured here as first screw domes 65 (they could alternatively also be configured as rivet domes, etc.).

Both first projections 61 have here, for example, a hollow through-channel 63 which runs parallel to the recess 71 . For example, a screw (or other fastening means such as a rivet) can be inserted through the through-channel 63 .

Both second projections 62 are configured here as second screw domes 66 (they could alternatively also be configured as rivet domes, etc.).

They both have, by way of example, a hollow through-channel 63 (not visible here) which runs parallel to the recess 71. For example, a screw (or other fastener such as a rivet) can be passed through the passageway 63 .

The two housing shells 21, 22 can in this way, for example, by attaching screws (or other fasteners) in the first screw Bendomen 65 and the passage through the second screw dome 66 are connected to one another to form the housing 20 (here: with the interposition of the three different sealing elements 24, 25, 26). The screws can dig into the through-channel 63 or a nut can be provided on the side opposite the screw head.

Figure 4 shows a schematic perspective view of a connector 14, 15, in which the first housing shell 21 is coupled to the connection unit 23 and the three sealing elements 24, 25, 26 and/or pre-assembled on these elements, but in which the second housing shell 22 is still attached has not been added to form the housing 20 - the second housing shell 22 is shown in a preassembled condition over the connector 14,15.

It can be seen how the first projection 61 is coupled to the recess 71 . It is inserted into the recess 71 along the insertion direction E.

Figure 5 shows a schematic perspective rear view of the connection unit 23, i.e. a view from the interior 40 of the housing 20 in the axial direction A.

On an outer side 29 of the connection unit 23, two blocking elements 30 are arranged here, for example, which are spaced apart from one another by approximately 180° as viewed from one another along the circumferential direction U, for example. The two locking elements 30 are designed to interact with a first counter-locking element 31 on a first inner side 51 of the first housing shell 21 on the one hand and with a second counter-locking element 32 on a second inner side 52 of the second housing shell 22 on the other hand in such a way that rotation of the housing 20 along the die axial direction A circumferential direction of rotation U relative to the connection unit 23 is prevented.

A rotation of more than 8° can preferably be prevented, particularly preferably a rotation of more than 4°. A small amount of play can be allowed, for example in the event of temperature changes or manufacturing tolerances to enable stress-free joining and working of the housing shells 21, 22 relative to the connection unit 23.

Locking element 30 and first or second counter-locking element 31, 32 are designed in particular to prevent such a relative displacement between housing 20 and connection unit 23 in the event that connection unit 23 is fixed or even locked, e.g. on a counter-connection 8. The relative displacement is by the interaction of blocking element 30 and first and/or second counter-blocking element 31, 32, e.g. with a force acting on housing 20 of up to 200N, preferably up to 300N and particularly preferably up to 400N and very particularly preferably of up to 500N.

FIG. 6 shows a detail of the connection unit from FIG. 5. It is easy to see that here the blocking element 30 and the second counter-blocking element 32 are designed to be form-fitting to one another, for example. In the same way (can be seen in FIG. 5), the blocking element 30 and the first counter-blocking element 31 are formed in a form-fitting manner with respect to one another.

The locking element 30 is formed here, for example, by two mutually adjacent locking element projections 30a (relative to the wall 70 of the connection unit), between which a locking element groove 30b (relative to the wall 70 of the connection unit) is formed. Blocking element projections 30a and blocking element groove 30b run here along the radial direction R. The second counter blocking element 32 shown in FIG. The second counter-locking element 32 has two spaced-apart grooves 34 between which a projection 33 is formed. In this way, an effective interlocking between the second housing shell 22 and the connection unit 23 against rotation along the circumferential direction U is formed. The two grooves 34 and the projection 33 run along the radial direction R here.

The first counter-locking element 31 is designed in an analogous manner (see FIG. 5). FIG. 7 shows a schematic longitudinal section through a connector 14, 15, in which the first housing shell 21 is visible.

Figure 8 shows a detail of the connection unit from Fig. 7.

Figures 7 and 8 are described together below.

The first end face 81 of the first housing shell 21 adjoins a stop 36 of the connection unit 23. The first projection 61 is arranged in the recess 71 at a distance from the first end face 81 (to the right of the first end face 81 in the direction of the line side 28 in FIG. 7). 7 also shows that the wall 70 of the connection unit 23 has two recesses 71: one on the upper side in FIG Floor). The two recesses 71 run parallel to one another here. The recesses 71 run in a straight line or in a straight line or linearly from one side of the wall 70 to the other side of the wall 70.

The upper first projection 61, which is accommodated in the upper recess 71, is positively coupled to this recess 71. In the same way, the lower first projection 61 is also coupled with the lower recess 71 in a form-fitting manner.

The second housing shell 72 with its two second projections 62 (not shown here) is positively coupled to the connection unit 23 in the same way. Here the two second projections 62 are each accommodated in a form-fitting manner in one of the recesses 71 or receptacles (lower recess 71 and upper recess 71) or are coupled to the recesses 71 or receptacles.

If a force F is now exerted in the direction of the arrow on the grip area 45 or grip section of the housing 20 in a state in which the connection unit 23 is fixed, for example, to a mating connection 8, this would occur without the housing 20 being fastened to the connection unit 23 and in particular without the recesses 71 and the first and second projections 61, 62 lead to a rotational movement (along the arrow with the reference number 91) of the housing 20 about a pivot point 90, this pivot point 90 being located here in the region of the first end face 90 at that point at which the end face meets the stop 36 (in Fig. 7 at the lower end of the connection unit 23). This is where the torque comes into play. As a result, the first housing shell 21 would gape open at the upper end of the connection unit 23 and slip off the interior area 85 of the connection unit 23 without being fastened, or cracks could occur in the housing 20 as a result of the expansion. The housing 20 would leak and the cables or lines arranged in the interior 40 could be damaged by shearing or tensile loading or pressure loading.

In order to prevent this and to connect the housing 20 to the connection unit 23 as firmly as possible without requiring separate fastening means from the housing 20 to the connection unit 23 (e.g. screws from the housing 20 to the connection unit 23), the first and second projections 61, 62 in the example two recordings 71 included here positively. In this example, the applied force along the arrow is directed from the upper first and second projection 61, 62 into the upper recess 71, so that there is no gap formation or a gaping of the first housing shell 21 in the area of the first end face 81 in the upper area of the connector 14, 15 and no cracks either. If the direction of force is opposite (in Fig. 7 the arrow F would then point upwards), the pivot point 90 would be at the upper end and the lower recess 71 together with the lower first projection 61 and/or the lower second projection 62 would ensure that the first and/or second housing shell 21, 22 is anchored to the connection unit 23 and thus prevent the housing 20 and connection unit 23 from gaping or cracking.

FIG. 8 shows a further exemplary improvement in the anchoring of the housing shells 21, 22 on or in the connection unit 23.

In order to be able to withstand larger torques or the effects of force, for example in the grip area 45 or, for example, by pulling on the connecting line 13 (for example in the case of a To prevent tripping over the connecting line 13 of the supply cable 10), the first and/or second projection 61, 62 slipping out of the recess 71 and a permanent gap can thus arise between the housing 20 and the connection unit 23, improved anchoring is provided here. For this purpose it is provided that in a cross section a diameter D of the opening 72 is smaller than the largest diameter DM of the recess 71. In particular it can be provided that the diameter D of the opening 72 is at least 5% smaller than the maximum diameter DM of the recess 71. This prevents the first and/or second projection 61, 62 from rolling outwards on the edge of the opening 72 and slipping or slipping out of the recess. In this case, for example, only the first and/or second projection 61, 62 can approximately fill out the cross section of the recess 71 (see FIGS. 7 and 8). This means that the first and/or second projection 61, 62 also has a maximum diameter that is larger than the diameter of the opening 72, for example by at least 5%. Provision can also be made for the first and/or second projection 61, 62 to be additionally accommodated in the recess 71 with a force fit, for example by the maximum diameter of the first and/or second projection 61, 62 (e.g. slightly, e.g. approx. 1% -5%) is larger than the diameter of the recess 71 at the corresponding points. On the one hand, the reduced diameter of the opening 72 maintains the opening 72, so that the first and/or second projection 61, 62 extends over the entire extent of the recess 71 on the first and/or second inner side 51, 52 of the first and/or second housing shell 21, 22 can be connected. At the same time, the first and/or second projection 61, 62 is encompassed on both sides by an undercut of the wall 70. A slight rotation in the recess 71 is possible, but no more slipping out or only with forces that go beyond a normal operation of the connector 14, 15.

As can also be seen in FIG. 8, the recess 71 or the first projection 61 (and also the second projection 62 (not visible here)) is at a distance d from the end face 81 of the first housing shell 21. The upper recess 71 is shown in FIG. 8. The distance d can also be the same as the lower end face 81 in FIG. viewed from direction A. The spacing causes improved anchoring and improves the effect against the housing 20 opening up in the area of the connection unit 23. The distance d can be, for example, at least 0.5 cm, preferably at least 1 cm and particularly preferably at least 2 cm.

Furthermore, the sealing effect in the area between the housing 20 and the connection unit 23 is improved by the form-fitting coupling of the first projections 61 and/or second projections 62 to the recess 71 shown here. If moisture, dirt or dirt should overcome the sealing elements 24, 25 from the outside 41 in the direction of the interior 40, these substances are blocked on their way into the interior by the form-fitting combination of first and/or second projections 61, which acts like a labyrinth seal. 62 and the recess 71 retained. The supply line 10 shown in FIG. 1 can have one or two of the connectors 14, 15 described above.

Claims

Connector (14, 15) for a supply cable (10) for electrically connecting a vehicle (12) to an energy supply device (16) providing electrical energy and/or to a consumer (19) requiring electrical energy, the connector (14, 15) having :

- a housing (20) with at least a first housing shell (21) and a second housing shell (22), in particular separate from the first housing shell (21),

- at least one connection unit (23) arranged in the housing (20) on a connection side (27) of the housing (20) for connection to the vehicle (12) or the energy supply device (16) or the consumer (19) along an axial direction (A ),

- A blocking element (30) being arranged on an outside (29) of the connection unit (23), which is set up with a first counter-blocking element (31) on a first inside (51) of the first housing shell (21) and/or with a second counter-locking element (32) on a second inner side (52) of the second housing shell (22) in such a way that rotation of the housing (20) along a circumferential direction (U) surrounding the axial direction (A) relative to the connection unit (23) is prevented , in particular a rotation of more than 8°, in particular with a force of up to 200N, preferably up to 300N and particularly preferably up to 500N acting on the housing (20), while the connection unit (23) is fixed, and/or

- A recess (71) being arranged in a wall (70) of the connection unit (23), which extends in a radial direction (R) perpendicular to the axial direction (A) and which is configured to have a first projection (61) which is arranged on the first inner side (51) of the first housing shell (21) and/or a second projection (62) which is arranged on the second inner side (52) of the second housing shell (22).

2. Connector according to the preceding claim, wherein the blocking element (30) and the first counter-blocking element (31) are formed in a form-fitting manner with respect to one another, and/or wherein the blocking element (30) and the second counter-blocking element (32) are formed in a form-fitting manner with respect to one another.

3. Connector according to one of the preceding claims, wherein the locking element (30) is designed as a locking element groove (30b) and the first counter-locking element (31) or the second counter-locking element (32) is designed as a projection (33) and/or wherein the locking element (30) is designed as a locking element projection (30a) and the first counter-locking element (31) or the second counter-locking element (32) is designed as a groove (34).

4. Connector according to one of the preceding claims, wherein the outside (29) of the connecting element (23) viewed in cross section has at least one flat first section (75) which, viewed in particular in the circumferential direction (U), extends over an angle in the range between 20° and 80°, with a second section (76) of the outside (29) in cross section outside of the first section (75) corresponding to a segment of a circle or an oval segment, with in particular the outside (29) in cross section consisting of the first section (75) and the second section (76).

5. Connector according to one of the preceding claims, wherein the first projection (61) with the recess (71) is positively coupled and / or wherein the second projection (62) is positively coupled to the recess (71).

6. Connector according to one of the preceding claims, wherein the recess (71) has a radially outward-pointing opening (72), wherein the first projection (61) and / or the second projection (62) in particular in the recess (71) can be inserted are in an insertion direction (E) perpendicular to the opening (72).

7. Connector according to the preceding claim, wherein in a cross section a diameter (D) of the opening (72) is smaller than the largest diameter (DM) of the recess (71), in particular by at least 5% smaller.

8. Connector according to one of the preceding claims, wherein the first projection (61) and/or the second projection (62) have a hollow through channel (63) which runs parallel to the recess (71).

9. Connector according to one of the preceding claims, wherein the recess (71) viewed in the axial direction (A) from a first end face (81) of the first housing shell (21) and/or from a second end face (82) of the second housing shell (22 ) is spaced apart, in particular by at least 1 cm, preferably by at least 2 cm.

10. A connector according to any one of the preceding claims and claim 4, wherein the recess (71) runs parallel to the first section (75).

11. Supply cable (10) for electrically connecting a vehicle (12) to an energy supply device (16) that provides electrical energy and/or to a consumer (19) that requires electrical energy, the supply cable (10) having:

- a connector (14, 15) according to any one of the preceding claims; -- a connecting line (13) which is electrically connected to the connector (14).

5