EP3084887B1 - Control device comprising a low-resistance electrical connection - Google Patents

Control device comprising a low-resistance electrical connection Download PDF

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Publication number
EP3084887B1
EP3084887B1 EP14789814.2A EP14789814A EP3084887B1 EP 3084887 B1 EP3084887 B1 EP 3084887B1 EP 14789814 A EP14789814 A EP 14789814A EP 3084887 B1 EP3084887 B1 EP 3084887B1
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EP
European Patent Office
Prior art keywords
sleeve
bolt
controller
plastic
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14789814.2A
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German (de)
French (fr)
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EP3084887A1 (en
Inventor
Udo Hennel
Georg Meincke
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3084887A1 publication Critical patent/EP3084887A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the invention relates to a control device for a motor vehicle, in particular a motor vehicle with an electric drive.
  • the control unit has a housing, wherein the housing encloses a cavity.
  • the control unit also has an electrical power device, in particular an inverter, which is arranged in the cavity.
  • a housing wall of the housing has an opening, wherein an electrical connection of the control device is guided through the opening, in particular from the outside into a housing interior of the housing.
  • a dynamoelectric machine in which stator terminals of the machine can be contacted via head portions and threaded portions of a bolt which is guided by a holding member.
  • the retaining element is cast in a fan guide, which acts as a cast body.
  • the electrical connection of the control device of the type mentioned at the beginning has an electrically conductive sleeve and a bolt.
  • the sleeve is electrically connected to the electrical device, in particular the inverter in particular separable, wherein the bolt is guided through the sleeve and is adapted to hold an end portion of an electrical connection cable and to press the end portion against an end face formed as the sleeve end of the sleeve and the electrical Connection cable so to connect to the connection.
  • the inverter can advantageously be connected to the connecting cable in a particularly low-impedance manner.
  • a high contact pressure against the electrically conductive sleeve can be generated that between the end portion of the electrical connection cable, which is formed for example by a cable lug, in particular a fork-shaped or eye-shaped cable lug, an almost full-surface or completely full-surface by means of the pressing generated galvanic contact between the terminal formed as a cable lug of the cable and the sleeve can be generated.
  • an electrical galvanic connection in particular an electrical connection produced by contacting two contacts, increases at a high contact pressure of the contacts, a conductance of the compound, as with increasing contact pressure, the effective contact surface of a common connection of the contact surfaces of the contacts Case of the connection increases the end face of the sleeve and the cable lug, and so decreases an ohmic contact resistance of the contact.
  • an electrical power loss generated at the electrical connection during operation of the inverter in which, for example, currents of several hundred amperes flow via the connection, can be kept small.
  • the electrical power device in particular the inverter, is designed to be supplied with electrical energy on the input side via the electrical connection.
  • the inverter is designed to generate an AC voltage from a DC voltage and preferably has a semiconductor switch half-bridge, for example B6 bridge or H-bridge.
  • the controller is a component of an electric drive for an electric vehicle, wherein the drive comprises an electric machine, which is connected to the controller and can be energized by the controller.
  • the drive comprises an electric machine, which is connected to the controller and can be energized by the controller.
  • an electric vehicle to the aforementioned drive.
  • a power device is a high-performance battery, in particular accumulator, a switch, in particular semiconductor switches or relays for switching a current of at least 100 amperes.
  • the electrical connection is a screw connection which is designed to be screw-connected to the connection cable.
  • the bolt on a pressing device and is adapted to press the end portion of the connecting cable, in particular the aforementioned cable lug, against the end face of the sleeve.
  • the pressing device of the bolt is preferably designed as a thread, wherein the pressing device has a screw element which is designed to connect to the thread and which is designed to engage in the thread in a screwing manner and press the end section against the end face in a form-locking and / or non-positive manner.
  • the thread is preferably an external thread or an internal thread.
  • the thread is for example a left-handed thread or right-handed thread.
  • the pressing device can advantageously have a screw nut as a screw element, so that the end section of the cable can be advantageously screw-connected to the electrical connection in a simple manner.
  • the bolt is set when tightening the nut under tension, whereas the sleeve which surrounds the bolt is placed under compressive stress. The nut and the end face of the sleeve thereby close the end section, in particular the cable lug of the connection cable, between one another.
  • the thread of the bolt is formed in the other embodiment as an internal thread.
  • the end portion of the connecting cable can advantageously be pressed by means of a screw against the end face of the sleeve.
  • a thread size of the screw is at least metric five to ten millimeters, in particular five, six, eight or ten millimeters.
  • a tightening torque of the screw connection is between 10 and 50 Newton meters depending on the aforementioned thread diameter.
  • the bolt is positively connected to the sleeve, in particular in the region of an end portion of the sleeve facing the housing interior.
  • the bolt can have, for example, a screw head which can engage behind the sleeve, in particular an end face, which forms an end of the sleeve opposite the connecting cable, in a form-fitting manner.
  • the pressing device has an eccentrically mounted lever, wherein the lever is connected to the bolt by means of a pivot joint.
  • the lever is designed to press the end portion pivotally against the end face of the sleeve.
  • the sleeve is formed as a hollow cylinder.
  • the sleeve can advantageously be low-cost, for example by drilling, turning or pulling provided.
  • the bolt is cylindrical at least on a longitudinal section.
  • a screw thread at an end portion of the bolt can be produced by turning or threading a low cost.
  • the sleeve - in particular along a longitudinal extent from the front side to a sleeve end inside the device - a greater electrical conductivity, as the bolt.
  • the bolt has a greater tensile strength along its longitudinal extent than the sleeve.
  • the sleeve is a copper sleeve, in particular of electrolytic copper.
  • the bolt preferably comprises iron and is more preferably a steel bolt, a stainless steel bolt or a bolt made of a material having a tensile strength higher than that of copper.
  • the electric current can be passed through the sleeve, which is formed of a metal having a good electrical conductivity, wherein the tensile strength of the sleeve material for producing the sufficiently good press connection is not required, insofar as the task of compression, providing a high tensile strength, is provided by the bolt, in particular a steel bolt.
  • the bolt protrudes with at least one end portion of the sleeve, wherein the bolt has at the protruding end portion of the pressing device.
  • the pressing device is arranged at the protruding end portion, or in the case of the aforementioned lever, coupled.
  • the sleeve is at least on a guided through the housing wall longitudinal portion, coated with a plastic insulation, more preferably in a plastic insulation forming plastic jacket embedded.
  • the sleeve is encapsulated at least on the longitudinal section with the plastic insulation.
  • the sleeve has at least one opening into which the plastic material of the plastic insulation extends into the interior of the sleeve and is designed to seal the sleeve against the bolt.
  • the connection can be advantageously protected against penetrating moisture.
  • the sleeve is rotatably connected to the plastic insulation.
  • the sheath may be formed by a plastic wall of the plastic housing. The sleeve may be for example injected into the plastic wall or passed through an opening in the plastic wall.
  • the sleeve is configured to deform radially outwardly in a barrel shape when compressed along the longitudinal axis.
  • a seal against the housing wall when pressing or screwing the connection cable to the electrical connection can be supported.
  • the plastic insulation causes an electrical insulation of the sleeve of the housing, in particular the housing wall.
  • the invention also relates to a method for connecting a cable end section to an electrical connection of a control device.
  • the electrical connection has an electrically conductive sleeve.
  • the sleeve is guided by a breakthrough through a housing wall, and the cable end portion by means of a guided through the sleeve bolt against pressed an end face of the sleeve, and thus generates an electrical contact between the cable end portion and the end face of the sleeve.
  • the inverter is preferably designed to energize an electrical machine of the motor vehicle for rotating a rotor of the electric machine.
  • the control unit may have at least one control device which is designed to control electrical components of the motor vehicle, for example a lighting system, windscreen wipers, door lock, power windows, driver assistance systems such as anti-lock braking system, lane departure warning system, parking aid or other electrical components.
  • FIG. 1 schematically shows an embodiment of a control unit 1 in a sectional view.
  • the control unit 1 has a housing 2.
  • the housing 2 encloses a cavity 3, in which an inverter 4 is arranged as an electric power device.
  • the housing 2 also has an opening 5 in a housing wall 21 of the housing 2, wherein an electrical connection 6 is arranged in the opening 5 is.
  • the breakthrough 5 is in FIG. 2 shown in more detail in connection with an exploded view of the electrical connection 6.
  • the electrical connection 6 comprises in this embodiment an electrically conductive sleeve 7, which is formed in this embodiment as a copper sleeve.
  • the electrical connection 6 also includes a bolt 8, which is formed in this embodiment as a steel bolt.
  • the bolt 8 is arranged in a cavity enclosed by the sleeve 7 and is enclosed by the sleeve 7 at least along a longitudinal section along a longitudinal axis 30 of the bolt 8.
  • the bolt 8 has a pressing device, wherein the pressing device comprises an external thread 12, which is formed on an end portion of the bolt 8, which projects beyond a formed by an end face 15 of the sleeve 7 sleeve end.
  • the pressing device comprises in this embodiment, a lock nut 11 which has an internal thread formed to the thread 12 and which is adapted to be screwed to the bolt 8, and when screwed to the bolt 8 an end portion 10 of a connecting cable 9 against the end face 15th to press the sleeve 7.
  • the end portion 10 of the longitudinal section shown connecting cable 9 is formed in this embodiment by an O-shaped cable lug, which is designed to pass through the end portion of the bolt 8 with the thread 12.
  • the bolt 8 has in this embodiment also has a ring-shaped web 23, which extends radially outward and which is adapted to press in the interior of the sleeve 7 against a sleeve wall of the sleeve 7 and so a - especially for molding compound dense - press fit produce.
  • the bolt 8 is thus positively connected to the sleeve 7.
  • the bolt 8 also has an end portion with the thread 12 facing away from the end portion with a thread 14 which projects out of the sleeve 7 and into the cavity 3.
  • the end portion with the thread 14 is formed to be screw-connected with a lock nut 13 and forms together with the lock nut 13, a pressing device which is adapted to press a bus bar 25 against an end face 16 of the sleeve 7.
  • the end face 16 of the sleeve 7 forms an end opposite to the end formed by the end face 15 of the sleeve. 7
  • the sleeve 7 is in this embodiment in a plastic sheath 17, hereinafter also called plastic sheath, arranged.
  • the sleeve 7 is embedded in the plastic sheath 17 and enclosed by the plastic sheath 17 at least on a longitudinal section.
  • the sleeve 7 protrudes with the end faces 15 and 16 out of the plastic jacket 17 so that the busbar 25 can be pressed against the end face 16 and the cable lug 10 against the end face 15.
  • the sleeve 7 also has radially inwardly extending openings, which are filled with plastic material 20.
  • the plastic material 20 is formed, for example, on the plastic sheath 17 and is penetrated when Ummolden or encapsulation of the sleeve 7 with plastic material in the openings up to the bolt 8.
  • the bolt is so sealed by means of the plastic material 20 against the sleeve 7, so that moisture can not penetrate through the terminal 6 into the interior of a device with the connection.
  • the electrical connection 6 also has an elastically formed seal 22, which in this embodiment is designed as a sealing ring which is arranged in a groove of the plastic jacket 17.
  • the seal 22 is formed and arranged to seal the plastic jacket 17 against the housing wall 21 of the housing 2.
  • the plastic sheath 17 also has an integrally formed on the plastic sheath 17 and extending radially outwardly mounting flange 18 on.
  • the mounting flange 18 has an opening, in particular a bore for performing a fastening screw 19, so that the plastic jacket 17 of the terminal 6 can be screw-connected by means of the fastening screw 19 with the housing wall 21 and there with a corresponding threaded hole.
  • the bolt 8 also has a radially outwardly extending annular ridge 24, which is designed to produce a press fit with the sleeve 7.
  • the sleeve 7 has for this purpose a radially inwardly extending web, or at least one projection region, which is designed to be pressed together with the web 24 of the bolt 8, wherein the web 24 is formed, along the longitudinal axis 30 against the radially inwardly extending web of the sleeve 7 to strike positively.
  • FIG. 2 shows the in FIG. 1 Shown is the lock nut 11, which is designed to be screwed to the thread 12 of the bolt 8 and together with the thread 12 forms a pressing device, wherein the pressing device is formed, a cable lug , for example, the in FIG. 1 shown cable lug 10 to press against the end face 15 of the sleeve 7. Shown are also in FIG. 1 already shown, radially inwardly extending openings in the sleeve 7, of which an opening 27 is exemplified.
  • the bolt 8 has in this embodiment, along the longitudinal extent of the bolt 8 between the web 23 and the web 24 arranged polygonal section 28.
  • the polygonal section 28 is formed in this embodiment by a hexagonal portion which is hexagonal in cross-section of the bolt 8.
  • the polygonal section 28 can be embedded in the encapsulation of the sleeve 7 with plastic material of the plastic material, which can penetrate through the openings 27 as the opening 27 in the interior of the sleeve 7 and fill a extending between the pin 8 and the inner wall of the sleeve 7 cavity ,
  • the web 24 is polygonal in this embodiment, as the polygonal section 28, in particular square in cross-section or hexagonal shaped, so that the bolt 8 when passing through the sleeve 7 and when striking against the radially inwardly extending web 24 - in particular about the longitudinal axis 30 -.
  • rotatably connected to the sleeve 7 can be connected.
  • the sleeve 7 is connected by means of recesses or openings such as the opening 27 penetrated molding compound, which forms the plastic material 20 after curing, rotatably connected to the plastic sheath 17.
  • FIG. 1 Shown is also the in FIG. 1 already illustrated seal 22, which can be inserted in this embodiment as an elastically formed sealing ring in a groove 29.
  • the groove 29 is formed in the plastic sheath 17 and extends radially inwardly toward the longitudinal axis 30.
  • the electrical connection 6, which comprises in this embodiment, the lock nut 13, the seal 22, the plastic sheath 17, the sleeve 7, the bolt 8 and the lock nut 11 is formed, passed through the opening 5 in the housing wall 21 and in the opening 5 to be arranged.
  • the electrical connection 6, in particular the plastic casing 17, is formed with the seal 22, to seal against the housing wall 21, so that no dirt or moisture in the in FIG. 1 shown cavity 3 of the housing 2 can penetrate.
  • the sleeve 7 when screwing the locknuts 11 and 13 along the longitudinal axis 30 compressed and thus deformed barrel-shaped radially outward.
  • a mutually different temperature expansions of the sleeve 7 and the plastic sheath 17, with temperature fluctuations possibly resulting gap between the sleeve 7 and the plastic sheath 17 can be avoided, since the sleeve 7 can press the plastic sheath 17 at the barrel-shaped Vers effectively resiliently radially outward.
  • the plastic sheath 17 is formed for example by a thermoplastic.
  • FIG. 3 shows an embodiment of an electrical connection 50, which instead of the electrical connection 6 to the control unit 1 in FIG. 1 can be realized.
  • the terminal 50 has a sleeve 7 which, like the sleeve 7 in FIG. 1 is trained.
  • the terminal 50 also has a longitudinally extending, cylindrically-shaped bolt 40 having a head 41 formed on the bolt 40.
  • the head 41 is formed when pressing the bolt 40 through the sleeve 7 to press the bus bar 25 positively against the end face 16.
  • the head 41 has a greater radial extent than the bolt 40.
  • the bolt 40 has in the region of an end remote from the head 41 an opening formed as a blind hole 46 in which an internal thread 44 is formed.
  • the longitudinal extension of the bolt 40 does not project beyond the longitudinal axis 30 of the end face 15 or the cable lug 10, so that a screw 43 can be screwed into the blind hole 46 and with a screw head 42 can positively press the cable lug 10 of the connecting cable 9 against the end face 15.
  • the bolt 40 has a radially outwardly extending seal 47, in particular an annular elastomeric seal, which is designed to seal the bolt against an inner wall of the sleeve 7.
  • the electrical connection 50 has a plastic jacket 45 which encloses the sleeve 7 along its longitudinal extent along the longitudinal axis 30.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Steuergerät für ein Kraftfahrzeug, insbesondere ein Kraftfahrzeug mit einem Elektroantrieb. Das Steuergerät weist ein Gehäuse auf, wobei das Gehäuse einen Hohlraum umschließt. Das Steuergerät weist auch eine elektrische Leistungsvorrichtung, insbesondere einen Inverter auf, welche in dem Hohlraum angeordnet ist.The invention relates to a control device for a motor vehicle, in particular a motor vehicle with an electric drive. The control unit has a housing, wherein the housing encloses a cavity. The control unit also has an electrical power device, in particular an inverter, which is arranged in the cavity.

Bei dem Steuergerät weist eine Gehäusewand des Gehäuses einen Durchbruch auf, wobei ein elektrischer Anschluss des Steuergeräts durch den Durchbruch, - insbesondere von außen in ein Gehäuseinneres des Gehäuses hinein -, geführt ist.In the control device, a housing wall of the housing has an opening, wherein an electrical connection of the control device is guided through the opening, in particular from the outside into a housing interior of the housing.

Aus der US 4 231 631 ist ein durch einen Durchbruch in einer Gehäusewand geführter elektrischer Verbinder bekannt, bei dem eine in einem elektrischen Isolator geführte Metallhülse mittels eines durch die Hülse geführten Schraubbolzen pressend kontaktiert werden kann.From the US 4,231,631 is an electrical connector guided through an opening in a housing wall, in which a guided in an electrical insulator metal sleeve can be contacted by means of a screw guided through the sleeve press-fit.

Aus der DE 10 2006 023164 A1 ist eine dynamoelektrische Maschine bekannt, bei der Statoranschlüsse der Maschine über Kopfabschnitte und Gewindeabschnitte eines Bolzens kontaktiert werden können, der durch ein Halteelement geführt ist. Das Halteelement ist in eine Lüfterführung eingegossen, die als ein Gusskörper wirkt.From the DE 10 2006 023164 A1 For example, a dynamoelectric machine is known in which stator terminals of the machine can be contacted via head portions and threaded portions of a bolt which is guided by a holding member. The retaining element is cast in a fan guide, which acts as a cast body.

Aus der US 2011 011 7784 ist ein elektrischer Anschluss bekannt, bei dem eine Versteifungsplatte in Kunststoff eingebettet ist.From the US 2011 011 7784 An electrical connection is known in which a stiffening plate is embedded in plastic.

Offenbarung der ErfindungDisclosure of the invention

Erfindungsgemäß weist der elektrische Anschluss des Steuergeräts der eingangs genannten Art eine elektrisch leitfähige Hülse und einen Bolzen auf. Die Hülse ist mit der elektrischen Vorrichtung, insbesondere dem Inverter insbesondere trennbar elektrisch verbunden, wobei der Bolzen durch die Hülse geführt ist und ausgebildet ist, einen Endabschnitt eines elektrischen Anschlusskabels festzuhalten und den Endabschnitt gegen ein als Stirnfläche ausgebildetes Hülsenende der Hülse zu pressen und das elektrische Anschlusskäbel so mit dem Anschluss zu verbinden.According to the invention, the electrical connection of the control device of the type mentioned at the beginning has an electrically conductive sleeve and a bolt. The sleeve is electrically connected to the electrical device, in particular the inverter in particular separable, wherein the bolt is guided through the sleeve and is adapted to hold an end portion of an electrical connection cable and to press the end portion against an end face formed as the sleeve end of the sleeve and the electrical Connection cable so to connect to the connection.

Mittels des so ausgebildeten elektrischen Anschlusses des Steuergeräts kann der Inverter vorteilhaft besonders niederohmig mit dem Anschlusskabel verbunden werden. Vorteilhaft kann mittels des Bolzens eine derart hohe Anpresskraft gegen die elektrisch leitfähige Hülse erzeugt werden, dass zwischen dem Endabschnitt des elektrischen Anschlusskabels, welches beispielsweise durch einen Kabelschuh, insbesondere einen gabelförmigen oder ösenförmigen Kabelschuh, gebildet ist, eine nahezu vollflächige oder vollständig vollflächige mittels der Pressung erzeugte galvanische Kontaktierung zwischen dem als Kabelschuh ausgebildeten Endabschnitt des Kabels und der Hülse erzeugt werden kann. Es wurde nämlich erkannt, dass eine elektrische galvanische Verbindung, insbesondere eine durch einander Berühren zweier Kontakte erzeugte elektrische Verbindung, bei einer hohen Anpresskraft der Kontakte ein Leitwert der Verbindung zunimmt, da mit zunehmender Anpresskraft die wirksame Kontaktfläche einer gemeinsamen Verbindung der Kontaktflächen der Kontakte, im Falle des Anschlusses die Stirnfläche der Hülse und der Kabelschuh, zunimmt und so ein ohmscher Übergangswiderstand des Kontaktes abnimmt.By means of the electrical connection of the control device designed in this way, the inverter can advantageously be connected to the connecting cable in a particularly low-impedance manner. Advantageously, by means of the bolt such a high contact pressure against the electrically conductive sleeve can be generated that between the end portion of the electrical connection cable, which is formed for example by a cable lug, in particular a fork-shaped or eye-shaped cable lug, an almost full-surface or completely full-surface by means of the pressing generated galvanic contact between the terminal formed as a cable lug of the cable and the sleeve can be generated. It has been recognized that an electrical galvanic connection, in particular an electrical connection produced by contacting two contacts, increases at a high contact pressure of the contacts, a conductance of the compound, as with increasing contact pressure, the effective contact surface of a common connection of the contact surfaces of the contacts Case of the connection increases the end face of the sleeve and the cable lug, and so decreases an ohmic contact resistance of the contact.

So kann weiter vorteilhaft eine an dem elektrischen Anschluss erzeugte elektrische Verlustleistung während eines Betriebs des Inverters, bei dem beispielsweise Ströme von mehreren hundert Ampere über den Anschluss fließen, klein gehalten sein.Thus, furthermore, an electrical power loss generated at the electrical connection during operation of the inverter, in which, for example, currents of several hundred amperes flow via the connection, can be kept small.

Die elektrische Leistungsvorrichtung, insbesondere der Inverter, ist ausgebildet, eingangsseitig über den elektrischen Anschluss mit elektrischer Energie versorgt zu werden.
Der Inverter ist ausgebildet, eine Wechselspannung aus einer Gleichspannung zu erzeugen und weist dazu bevorzugt eine Halbleiterschalter Halbbrücke, beispielsweise B6-Brücke oder H-Brücke auf. Der Halbleiterschalter ist bevorzugt ein Feldeffekttransistor, beispielsweise ein MOS-FET (MOS-FET = Metall-Oxid-Feld-Effekt-Transistor).The electrical power device, in particular the inverter, is designed to be supplied with electrical energy on the input side via the electrical connection.
The inverter is designed to generate an AC voltage from a DC voltage and preferably has a semiconductor switch half-bridge, for example B6 bridge or H-bridge. The semiconductor switch is preferably a field-effect transistor, for example a MOS-FET (MOS-FET = metal oxide field effect transistor).

Vorteilhaft ist das Steuergerät ein Bestandteil eines elektrischen Antriebs für ein Elektrofahrzeug, wobei der Antrieb eine elektrische Maschine umfasst, welche mit dem Steuergerät verbunden ist und von dem Steuergerät bestromt werden kann. Vorteilhaft weist ein Elektrofahrzeug den vorgenannten Antrieb auf.Advantageously, the controller is a component of an electric drive for an electric vehicle, wherein the drive comprises an electric machine, which is connected to the controller and can be energized by the controller. Advantageously, an electric vehicle to the aforementioned drive.

Andere vorteilhafte Ausführungsformen für eine Leistungsvorrichtung sind eine Hochleistungsbatterie, insbesondere Akkumulator, ein Schalter, insbesondere Halbleiterschalter oder Relais zum Schalten eines Stromes von mindestens 100 Ampere.Other advantageous embodiments of a power device are a high-performance battery, in particular accumulator, a switch, in particular semiconductor switches or relays for switching a current of at least 100 amperes.

Bevorzugt ist der elektrische Anschluss ein Schraubanschluss, welcher ausgebildet ist, mit dem Anschlusskabel schraubverbunden zu werden.Preferably, the electrical connection is a screw connection which is designed to be screw-connected to the connection cable.

Bevorzugt weist der Bolzen eine Pressvorrichtung auf und ist ausgebildet, den Endabschnitt des Anschlusskabels, insbesondere den vorgenannten Kabelschuh, gegen die Stirnfläche der Hülse zu pressen. Die Pressvorrichtung des Bolzens ist bevorzugt als ein Gewinde ausgebildet, wobei die Pressvorrichtung ein zum Verbinden mit dem Gewinde ausgebildetes Schraubelement aufweist, welches ausgebildet ist, schraubend in das Gewinde einzugreifen und den Endabschnitt formschlüssig und/oder kraftschlüssig gegen die Stirnfläche zu pressen.Preferably, the bolt on a pressing device and is adapted to press the end portion of the connecting cable, in particular the aforementioned cable lug, against the end face of the sleeve. The pressing device of the bolt is preferably designed as a thread, wherein the pressing device has a screw element which is designed to connect to the thread and which is designed to engage in the thread in a screwing manner and press the end section against the end face in a form-locking and / or non-positive manner.

Das Gewinde ist bevorzugt ein Außengewinde oder ein Innengewinde. Das Gewinde ist beispielsweise ein linksdrehendes Gewinde oder rechtsdrehendes Gewinde.
Die Pressvorrichtung kann so im Falle des Außengewindes vorteilhaft eine Schraubmutter als Schraubelement aufweisen, sodass der Endabschnitt des Kabels so vorteilhaft auf einfache Weise mit dem elektrischen Anschluss schraubverbunden werden kann. Dabei wird der Bolzen beim Anziehen der Schraubmutter unter Zugspannung gesetzt, wogegen die Hülse, welche den Bolzen umschließt, unter Druckspannung gesetzt wird. Die Schraubmutter und die Stirnfläche der Hülse schließen dabei den Endabschnitt, insbesondere den Kabelschuh des Anschlusskabels, zwischeneinander ein.The thread is preferably an external thread or an internal thread. The thread is for example a left-handed thread or right-handed thread.
In the case of the external thread, the pressing device can advantageously have a screw nut as a screw element, so that the end section of the cable can be advantageously screw-connected to the electrical connection in a simple manner. In this case, the bolt is set when tightening the nut under tension, whereas the sleeve which surrounds the bolt is placed under compressive stress. The nut and the end face of the sleeve thereby close the end section, in particular the cable lug of the connection cable, between one another.

Das Gewinde des Bolzens ist in der anderen Ausführungsform als Innengewinde ausgebildet. So kann der Endabschnitt des Anschlusskabels vorteilhaft mittels einer Schraube gegen die Stirnfläche der Hülse gepresst werden.The thread of the bolt is formed in the other embodiment as an internal thread. Thus, the end portion of the connecting cable can advantageously be pressed by means of a screw against the end face of the sleeve.

Bevorzugt beträgt ein Gewindemaß der Schraubverbindung wenigstens metrisch fünf bis zehn Millimeter, insbesondere fünf, sechs, acht oder zehn Millimeter. Beispielsweise beträgt ein Anzugsdrehmoment der Schraubverbindung je nach vorgenanntem Gewindedurchmesser zwischen 10 und 50 Newtonmeter.Preferably, a thread size of the screw is at least metric five to ten millimeters, in particular five, six, eight or ten millimeters. For example, a tightening torque of the screw connection is between 10 and 50 Newton meters depending on the aforementioned thread diameter.

Bevorzugt ist der Bolzen mit der Hülse, insbesondere im Bereich eines zum Gehäuseinneren weisenden Endabschnitts der Hülse formschlüssig verbunden. Der Bolzen kann dazu beispielsweise einen Schraubenkopf aufweisen, welcher die Hülse, insbesondere eine Stirnfläche, welche ein zum Verbinden mit dem Anschlusskabel entgegengesetztes Ende der Hülse bildet, formschlüssig hintergreifen kann.Preferably, the bolt is positively connected to the sleeve, in particular in the region of an end portion of the sleeve facing the housing interior. For this purpose, the bolt can have, for example, a screw head which can engage behind the sleeve, in particular an end face, which forms an end of the sleeve opposite the connecting cable, in a form-fitting manner.

In einer anderen Ausführungsform weist die Pressvorrichtung einen exzentrisch gelagerten Hebel auf, wobei der Hebel mit dem Bolzen mittels eines Schwenkgelenks verbunden ist. Der Hebel ist ausgebildet, den Endabschnitt schwenkend gegen die Stirnfläche der Hülse zu pressen. Durch den so schwenkbar gelagerten Hebel kann der Endabschnitt vorteilhaft durch bloßes Schwenken des Hebels trennbar mit dem Anschluss verbunden werden.In another embodiment, the pressing device has an eccentrically mounted lever, wherein the lever is connected to the bolt by means of a pivot joint. The lever is designed to press the end portion pivotally against the end face of the sleeve. By virtue of the lever pivotably mounted in this way, the end section can advantageously be separably connected to the connection by merely pivoting the lever.

In einer bevorzugten Ausführungsform ist die Hülse hohlzylindrisch ausgebildet. So kann die Hülse vorteilhaft aufwandsgünstig, beispielsweise mittels Bohren, Drehen oder Ziehen bereitgestellt werden.In a preferred embodiment, the sleeve is formed as a hollow cylinder. Thus, the sleeve can advantageously be low-cost, for example by drilling, turning or pulling provided.

Weiter bevorzugt ist der Bolzen wenigstens auf einem Längsabschnitt zylindrisch ausgebildet. Dadurch kann aufwandsgünstig ein Schraubgewinde an einem Endabschnitt des Bolzens durch Drehen oder Gewindeschneiden erzeugt werden.More preferably, the bolt is cylindrical at least on a longitudinal section. As a result, a screw thread at an end portion of the bolt can be produced by turning or threading a low cost.

In einer bevorzugten Ausführungsform weist die Hülse - insbesondere entlang einer Längserstreckung von der Stirnseite bis hin zu einem Hülsenende im Geräteinneren - eine größere elektrische Leitfähigkeit auf, als der Bolzen. Weiter bevorzugt weist der Bolzen eine größere Zugfestigkeit entlang seiner Längserstreckung auf, als die Hülse. So kann vorteilhaft ein elektrischer Kontakt stromverlustarm über die Hülse von dem Anschluss bis ins Geräteinnere, und dort beispielsweise bis zum Inverter, geführt werden. Der zugfeste Bolzen bewirkt vorteilhaft, dass die Pressvorrichtung den Endabschnitt mit einer hohen Anpresskraft gegen die - bevorzugt besser als der Bolzen - elektrisch leitfähige Hülse pressen kann, ohne dabei abzureißen.

In einer bevorzugten Ausführungsform des Steuergeräts ist die Hülse eine Kupferhülse, insbesondere aus Elektrolytkupfer. Der Bolzen weist bevorzugt Eisen auf und ist weiter bevorzugt ein Stahlbolzen, ein Edelstahlbolzen oder ein Bolzen aus einem Material mit einer größeren Zugfestigkeit als Kupfer. So kann vorteilhaft der elektrische Strom über die Hülse geführt werden, welche aus einem Metall gebildet ist, das eine gute elektrische Leitfähigkeit aufweist, wobei die Zugfestigkeit des Hülsenmaterials zum Erzeugen der hinreichend guten Pressverbindung nicht erforderlich ist, insoweit die Aufgabe des Verpressens, unter Bereitstellung einer hohen Zugfestigkeit, durch den Bolzen, insbesondere einen Stahlbolzen, bereitgestellt wird.
In einer bevorzugten Ausführungsform ragt der Bolzen mit wenigstens einem Endabschnitt aus der Hülse heraus, wobei der Bolzen an dem herausragenden Endabschnitt die Pressvorrichtung aufweist. Weiter bevorzugt ist an dem herausragenden Endabschnitt die Pressvorrichtung angeordnet, oder im Falle des zuvor erwähnten Hebels, angekoppelt. So kann vorteilhaft von dem aus der Hülse herausragenden Endabschnitt aus eine hohe Presskraft auf die Stirnseite der Hülse erzeugt werden.In a preferred embodiment, the sleeve - in particular along a longitudinal extent from the front side to a sleeve end inside the device - a greater electrical conductivity, as the bolt. More preferably, the bolt has a greater tensile strength along its longitudinal extent than the sleeve. Thus, advantageously, an electrical contact low-current loss over the sleeve from the terminal to the inside of the device, and there, for example, to the inverter, are performed. The tensile bolt causes advantageous that the pressing device can press the end portion with a high contact force against the - preferably better than the bolt - electrically conductive sleeve, without tearing it.

In a preferred embodiment of the control device, the sleeve is a copper sleeve, in particular of electrolytic copper. The bolt preferably comprises iron and is more preferably a steel bolt, a stainless steel bolt or a bolt made of a material having a tensile strength higher than that of copper. Thus, advantageously, the electric current can be passed through the sleeve, which is formed of a metal having a good electrical conductivity, wherein the tensile strength of the sleeve material for producing the sufficiently good press connection is not required, insofar as the task of compression, providing a high tensile strength, is provided by the bolt, in particular a steel bolt.
In a preferred embodiment, the bolt protrudes with at least one end portion of the sleeve, wherein the bolt has at the protruding end portion of the pressing device. More preferably, the pressing device is arranged at the protruding end portion, or in the case of the aforementioned lever, coupled. Thus, it is advantageous to generate a high pressing force on the end face of the sleeve from the end section protruding from the sleeve.

Erfndungsgemäß ist die Hülse wenigstens auf einem durch die Gehäusewand geführten Längsabschnitt, mit einer Kunststoffisolierung ummantelt, weiter bevorzugt in einen die Kunststoffisolierung bildenden Kunststoffmantel eingebettet. Besonders bevorzugt ist die Hülse wenigstens auf dem Längsabschnitt mit der Kunststoffisolierung umspritzt.Erfndungsgemäß the sleeve is at least on a guided through the housing wall longitudinal portion, coated with a plastic insulation, more preferably in a plastic insulation forming plastic jacket embedded. Particularly preferably, the sleeve is encapsulated at least on the longitudinal section with the plastic insulation.

Erfndungsgemäß weist die Hülse wenigstens einen Durchbruch auf, in den sich das Kunststoffmaterial der Kunststoffisolierung ins Innere der Hülse erstreckt und ausgebildet ist, die Hülse gegen den Bolzen abzudichten. So kann der Anschluss vorteilhaft gegen eindringende Feuchtigkeit geschützt sein. Weiter vorteilhaft ist die Hülse so mit der Kunststoffisolierung drehfest verbunden.
Im Falle eines Gehäuses des Steuergeräts als Kunststoffgehäuse, kann die Ummantelung durch eine Kunststoffwand des Kunststoffgehäuses gebildet sein. Die Hülse kann dazu beispielsweise in die Kunststoffwand eingespritzt sein oder durch einen Durchbruch in der Kunststoffwand hindurchgeführt sein.
Mittels des so ausgebildeten elektrischen Anschlusses des Steuergeräts kann das Steuergerät vorteilhaft sehr gut gegen eindringende Feuchtigkeit im Bereich des Anschlusses geschützt sein.
Bevorzugt ist die Hülse ausgebildet, sich beim Komprimiertwerden entlang der Längsachse tonnenförmig radial nach außen zu verformen. So kann vorteilhaft eine Abdichtung gegen die Gehäusewand beim Anpressen oder Anschrauben des Anschlusskabels an den elektrischen Anschluss unterstützt werden.
Weiter vorteilhaft bewirkt die Kunststoffisolierung eine elektrische Isolierung der Hülse von dem Gehäuse, insbesondere der Gehäusewand.
Die Erfindung betrifft auch ein Verfahren zum Verbinden eines Kabelendabschnitts mit einem elektrischen Anschluss eines Steuergeräts.
Der elektrische Anschluss weist eine elektrisch leitfähige Hülse auf. Bei dem Verfahren wird die Hülse durch einen Durchbruch durch eine Gehäusewand geführt, und der Kabelendabschnitt mittels eines durch die Hülse geführten Bolzens gegen eine Stirnseite der Hülse gepresst, und so ein elektrischer Kontakt zwischen dem Kabelendabschnitt und der Stirnseite der Hülse erzeugt.According to the invention, the sleeve has at least one opening into which the plastic material of the plastic insulation extends into the interior of the sleeve and is designed to seal the sleeve against the bolt. Thus, the connection can be advantageously protected against penetrating moisture. Further advantageously, the sleeve is rotatably connected to the plastic insulation.
In the case of a housing of the controller as a plastic housing, the sheath may be formed by a plastic wall of the plastic housing. The sleeve may be for example injected into the plastic wall or passed through an opening in the plastic wall.
By means of the electrical connection of the control device designed in this way, the control device can advantageously be protected very well against ingress of moisture in the region of the connection.
Preferably, the sleeve is configured to deform radially outwardly in a barrel shape when compressed along the longitudinal axis. Thus, advantageously, a seal against the housing wall when pressing or screwing the connection cable to the electrical connection can be supported.
Further advantageously, the plastic insulation causes an electrical insulation of the sleeve of the housing, in particular the housing wall.
The invention also relates to a method for connecting a cable end section to an electrical connection of a control device.
The electrical connection has an electrically conductive sleeve. In the method, the sleeve is guided by a breakthrough through a housing wall, and the cable end portion by means of a guided through the sleeve bolt against pressed an end face of the sleeve, and thus generates an electrical contact between the cable end portion and the end face of the sleeve.

Der Inverter ist bevorzugt ausgebildet, eine elektrische Maschine des Kraftfahrzeugs zum Drehbewegen eines Rotors der elektrischen Maschine zu bestromen. Das Steuergerät kann zusätzlich zu dem Inverter wenigstens eine Steuervorrichtung aufweisen, welche ausgebildet ist, elektrische Komponenten des Kraftfahrzeugs, beispielsweise eine Beleuchtungsanlage, Scheibenwischer, Türverriegelung, Fensterheber, Fahrerassistenzsysteme wie Antiblockiersystem, Spurhalteassistent, Einparkhilfe oder andere elektrische Komponenten zu steuern.The inverter is preferably designed to energize an electrical machine of the motor vehicle for rotating a rotor of the electric machine. In addition to the inverter, the control unit may have at least one control device which is designed to control electrical components of the motor vehicle, for example a lighting system, windscreen wipers, door lock, power windows, driver assistance systems such as anti-lock braking system, lane departure warning system, parking aid or other electrical components.

Die Erfindung wird nun im Folgenden anhand von weiteren Ausführungsbeispielen beschrieben. Weitere vorteilhafte Ausführungsvarianten ergeben sich aus den Merkmalen der Figuren und der abhängigen Ansprüche.

  • Figur 1 zeigt ein Ausführungsbeispiel für ein Steuergerät, bei dem ein elektrischer Anschluss mittels einer Kupferhülse und einer Pressvorrichtung umfassend einen Schraubbolzen durch eine Gehäusewand des Steuergeräts geführt ist;
  • Figur 2 zeigt den in Figur 1 dargestellten elektrischen Anschluss in einer Explosionsdarstellung;
  • Figur 3 zeigt eine Variante des in Figur 1 gezeigten Anschlusses, bei dem der Bolzen einen Kopf und ein Innengewinde als Pressvorrichtung aufweist.
The invention will now be described below with reference to further embodiments. Further advantageous embodiments will become apparent from the features of the figures and the dependent claims.
  • FIG. 1 shows an embodiment for a control device, in which an electrical connection is guided by means of a copper sleeve and a pressing device comprising a bolt through a housing wall of the control unit;
  • FIG. 2 shows the in FIG. 1 illustrated electrical connection in an exploded view;
  • FIG. 3 shows a variant of in FIG. 1 shown terminal, wherein the bolt has a head and an internal thread as a pressing device.

Figur 1 zeigt schematisch ein Ausführungsbeispiel für ein Steuergerät 1 in einer Schnittdarstellung. Das Steuergerät 1 weist ein Gehäuse 2 auf. Das Gehäuse 2 umschließt einen Hohlraum 3, in welchem ein Inverter 4 als elektrische Leistungsvorrichtung angeordnet ist. FIG. 1 schematically shows an embodiment of a control unit 1 in a sectional view. The control unit 1 has a housing 2. The housing 2 encloses a cavity 3, in which an inverter 4 is arranged as an electric power device.

Das Gehäuse 2 weist auch einen Durchbruch 5 in einer Gehäusewand 21 des Gehäuses 2 auf, wobei ein elektrischer Anschluss 6 in dem Durchbruch 5 angeordnet ist. Der Durchbruch 5 ist in Figur 2 im Zusammenhang mit einer Explosionsdarstellung des elektrischen Anschlusses 6 näher dargestellt.The housing 2 also has an opening 5 in a housing wall 21 of the housing 2, wherein an electrical connection 6 is arranged in the opening 5 is. The breakthrough 5 is in FIG. 2 shown in more detail in connection with an exploded view of the electrical connection 6.

Der elektrische Anschluss 6 umfasst in diesem Ausführungsbeispiel eine elektrisch leitfähige Hülse 7, welche in diesem Ausführungsbeispiel als Kupferhülse ausgebildet ist. Der elektrische Anschluss 6 umfasst auch einen Bolzen 8, welcher in diesem Ausführungsbeispiel als Stahlbolzen ausgebildet ist. Der Bolzen 8 ist in einem von der Hülse 7 umschlossenen Hohlraum angeordnet und ist wenigstens auf einem Längsabschnitt entlang einer Längsachse 30 des Bolzens 8 von der Hülse 7 umschlossen.The electrical connection 6 comprises in this embodiment an electrically conductive sleeve 7, which is formed in this embodiment as a copper sleeve. The electrical connection 6 also includes a bolt 8, which is formed in this embodiment as a steel bolt. The bolt 8 is arranged in a cavity enclosed by the sleeve 7 and is enclosed by the sleeve 7 at least along a longitudinal section along a longitudinal axis 30 of the bolt 8.

Der Bolzen 8 weist eine Pressvorrichtung auf, wobei die Pressvorrichtung ein Außengewinde 12 umfasst, welches auf einem Endabschnitt des Bolzens 8 ausgebildet ist, welcher über ein durch eine Stirnseite 15 der Hülse 7 gebildetes Hülsenende hinausragt. Die Pressvorrichtung umfasst in diesem Ausführungsbeispiel auch eine Kontermutter 11, welche ein zu dem Gewinde 12 ausgebildetes Innengewinde aufweist und welche ausgebildet ist, mit dem Bolzen 8 schraubverbunden zu werden, und beim Schraubverbinden mit dem Bolzen 8 einen Endabschnitt 10 eines Anschlusskabels 9 gegen die Stirnseite 15 der Hülse 7 zu pressen.The bolt 8 has a pressing device, wherein the pressing device comprises an external thread 12, which is formed on an end portion of the bolt 8, which projects beyond a formed by an end face 15 of the sleeve 7 sleeve end. The pressing device comprises in this embodiment, a lock nut 11 which has an internal thread formed to the thread 12 and which is adapted to be screwed to the bolt 8, and when screwed to the bolt 8 an end portion 10 of a connecting cable 9 against the end face 15th to press the sleeve 7.

Der Endabschnitt 10 des längsabschnittsweise dargestellten Anschlusskabels 9 ist in diesem Ausführungsbeispiel durch einen O-ringförmigen Kabelschuh gebildet, welcher zum Durchführen des Endabschnitts des Bolzens 8 mit dem Gewinde 12 ausgebildet ist.The end portion 10 of the longitudinal section shown connecting cable 9 is formed in this embodiment by an O-shaped cable lug, which is designed to pass through the end portion of the bolt 8 with the thread 12.

Der Bolzen 8 weist in diesem Ausführungsbeispiel auch einen ringförmig ausgebildeten Steg 23 auf, welcher sich radial nach außen erstreckt und welcher ausgebildet ist, im Inneren der Hülse 7 gegen eine Hülsenwand der Hülse 7 zu pressen und so einen - insbesondere für Moldmasse dichten - Presssitz zu erzeugen. Der Bolzen 8 ist so mit der Hülse 7 kraftschlüssig verbunden.The bolt 8 has in this embodiment also has a ring-shaped web 23, which extends radially outward and which is adapted to press in the interior of the sleeve 7 against a sleeve wall of the sleeve 7 and so a - especially for molding compound dense - press fit produce. The bolt 8 is thus positively connected to the sleeve 7.

Der Bolzen 8 weist auch einen von dem Endabschnitt mit dem Gewinde 12 abweisenden Endabschnitt mit einem Gewinde 14 auf, welcher aus der Hülse 7 heraus und in den Hohlraum 3 hineinragt.The bolt 8 also has an end portion with the thread 12 facing away from the end portion with a thread 14 which projects out of the sleeve 7 and into the cavity 3.

Der Endabschnitt mit dem Gewinde 14 ist ausgebildet, mit einer Kontermutter 13 schraubverbunden zu werden und bildet zusammen mit der Kontermutter 13 eine Pressvorrichtung, welche ausgebildet ist, eine Stromschiene 25 gegen eine Stirnseite 16 der Hülse 7 zu pressen. Die Stirnseite 16 der Hülse 7 bildet dabei ein zu dem durch die Stirnseite 15 gebildeten Ende entgegengesetztes Ende der Hülse 7.The end portion with the thread 14 is formed to be screw-connected with a lock nut 13 and forms together with the lock nut 13, a pressing device which is adapted to press a bus bar 25 against an end face 16 of the sleeve 7. The end face 16 of the sleeve 7 forms an end opposite to the end formed by the end face 15 of the sleeve. 7

Die Hülse 7 ist in diesem Ausführungsbeispiel in einem Kunststoffmantel 17, im Folgenden auch Kunststoffummantelung genannt, angeordnet. Die Hülse 7 ist in dem Kunststoffmantel 17 eingebettet und von dem Kunststoffmantel 17 wenigstens auf einem Längsabschnitt umschlossen. Die Hülse 7 ragt mit den Stirnseiten 15 und 16 aus dem Kunststoffmantel 17 heraus, sodass die Stromschiene 25 gegen die Stirnseite 16 und der Kabelschuh 10 gegen die Stirnseite 15 gepresst werden kann.The sleeve 7 is in this embodiment in a plastic sheath 17, hereinafter also called plastic sheath, arranged. The sleeve 7 is embedded in the plastic sheath 17 and enclosed by the plastic sheath 17 at least on a longitudinal section. The sleeve 7 protrudes with the end faces 15 and 16 out of the plastic jacket 17 so that the busbar 25 can be pressed against the end face 16 and the cable lug 10 against the end face 15.

Die Hülse 7 weist in diesem Ausführungsbeispiel auch sich radial nach innen erstreckende Durchbrüche auf, welche mit Kunststoffmaterial 20 gefüllt sind. Das Kunststoffmaterial 20 ist beispielsweise an dem Kunststoffmantel 17 angeformt und ist beim Ummolden oder Umspritzen der Hülse 7 mit Kunststoffmaterial in die Durchbrüche bis hin zum Bolzen 8 eingedrungen. Der Bolzen ist so mittels des Kunststoffmaterials 20 gegen die Hülse 7 abgedichtet, so dass auch Feuchtigkeit nicht durch den Anschluss 6 ins Innere eines Gerätes mit dem Anschluss dringen kann.In this exemplary embodiment, the sleeve 7 also has radially inwardly extending openings, which are filled with plastic material 20. The plastic material 20 is formed, for example, on the plastic sheath 17 and is penetrated when Ummolden or encapsulation of the sleeve 7 with plastic material in the openings up to the bolt 8. The bolt is so sealed by means of the plastic material 20 against the sleeve 7, so that moisture can not penetrate through the terminal 6 into the interior of a device with the connection.

Der elektrische Anschluss 6 weist auch eine elastisch ausgebildete Dichtung 22 auf, welche in diesem Ausführungsbeispiel als Dichtring ausgebildet ist, welcher in einer Nut des Kunststoffmantels 17 angeordnet ist. Die Dichtung 22 ist ausgebildet und angeordnet, den Kunststoffmantel 17 gegen die Gehäusewand 21 des Gehäuses 2 abzudichten. Der Kunststoffmantel 17 weist auch einen an den Kunststoffmantel 17 angeformten und sich radial nach außen erstreckenden Befestigungsflansch 18 auf. Der Befestigungsflansch 18 weist einen Durchbruch, insbesondere eine Bohrung zum Durchführen einer Befestigungsschraube 19 auf, sodass der Kunststoffmantel 17 des Anschlusses 6 mittels der Befestigungsschraube 19 mit der Gehäusewand 21 und dort mit einem entsprechenden Gewindeloch schraubverbunden werden kann.The electrical connection 6 also has an elastically formed seal 22, which in this embodiment is designed as a sealing ring which is arranged in a groove of the plastic jacket 17. The seal 22 is formed and arranged to seal the plastic jacket 17 against the housing wall 21 of the housing 2. The plastic sheath 17 also has an integrally formed on the plastic sheath 17 and extending radially outwardly mounting flange 18 on. The mounting flange 18 has an opening, in particular a bore for performing a fastening screw 19, so that the plastic jacket 17 of the terminal 6 can be screw-connected by means of the fastening screw 19 with the housing wall 21 and there with a corresponding threaded hole.

Der Bolzen 8 weist auch einen sich radial nach außen erstreckenden ringförmigen Steg 24 auf, welcher ausgebildet ist, mit der Hülse 7 einen Presssitz zu erzeugen. Die Hülse 7 weist dazu einen sich radial nach innen erstreckenden Steg, oder wenigstens einen Vorsprungsbereich auf, welcher ausgebildet ist, zusammen mit dem Steg 24 des Bolzens 8 verpresst zu werden, wobei der Steg 24 ausgebildet ist, entlang der Längsachse 30 gegen den sich radial nach innen erstreckenden Steg der Hülse 7 formschlüssig anzuschlagen.The bolt 8 also has a radially outwardly extending annular ridge 24, which is designed to produce a press fit with the sleeve 7. The sleeve 7 has for this purpose a radially inwardly extending web, or at least one projection region, which is designed to be pressed together with the web 24 of the bolt 8, wherein the web 24 is formed, along the longitudinal axis 30 against the radially inwardly extending web of the sleeve 7 to strike positively.

Figur 2 zeigt den in Figur 1 dargestellten elektrischen Anschluss 6 in einer Explosionsdarstellung entlang der Längsachse 30. Dargestellt ist die Kontermutter 11, welche ausgebildet ist, mit dem Gewinde 12 des Bolzens 8 verschraubt zu werden und zusammen mit dem Gewinde 12 eine Pressvorrichtung bildet, wobei die Pressvorrichtung ausgebildet ist, einen Kabelschuh, beispielsweise den in Figur 1 dargestellten Kabelschuh 10, gegen die Stirnseite 15 der Hülse 7 zu pressen. Dargestellt sind auch die in Figur 1 bereits dargestellten sich radial nach innen erstreckenden Durchbrüche in der Hülse 7, von denen ein Durchbruch 27 beispielhaft bezeichnet ist. FIG. 2 shows the in FIG. 1 Shown is the lock nut 11, which is designed to be screwed to the thread 12 of the bolt 8 and together with the thread 12 forms a pressing device, wherein the pressing device is formed, a cable lug , for example, the in FIG. 1 shown cable lug 10 to press against the end face 15 of the sleeve 7. Shown are also in FIG. 1 already shown, radially inwardly extending openings in the sleeve 7, of which an opening 27 is exemplified.

Der Bolzen 8 weist in diesem Ausführungsbeispiel auch entlang der Längserstreckung des Bolzens 8 zwischen dem Steg 23 und dem Steg 24 angeordneten Mehrkantabschnitt 28 auf. Der Mehrkantabschnitt 28 ist in diesem Ausführungsbeispiel durch einen Sechskantabschnitt gebildet, welcher im Querschnitt des Bolzens 8 sechseckförmig ausgebildet ist. Der Mehrkantabschnitt 28 kann beim Umspritzen der Hülse 7 mit Kunststoffmaterial von dem Kunststoffmaterial eingebettet werden, welches durch die Durchbrüche wie den Durchbruch 27 in den Innenraum der Hülse 7 eindringen kann und einen sich zwischen dem Bolzen 8 und der Innenwand der Hülse 7 erstreckenden Hohlraum ausfüllen kann.The bolt 8 has in this embodiment, along the longitudinal extent of the bolt 8 between the web 23 and the web 24 arranged polygonal section 28. The polygonal section 28 is formed in this embodiment by a hexagonal portion which is hexagonal in cross-section of the bolt 8. The polygonal section 28 can be embedded in the encapsulation of the sleeve 7 with plastic material of the plastic material, which can penetrate through the openings 27 as the opening 27 in the interior of the sleeve 7 and fill a extending between the pin 8 and the inner wall of the sleeve 7 cavity ,

Der Steg 24 ist in diesem Ausführungsbeispiel wie der Mehrkantabschnitt 28 mehrkantförmig, insbesondere im Querschnitt vierkantförmig oder sechskantförmig ausgebildet, sodass der Bolzen 8 beim Durchführen durch die Hülse 7 und beim Anschlagen gegen den sich radial nach innen erstreckenden Steg 24 - insbesondere um die Längsachse 30 - drehfest mit der Hülse 7 verbunden werden kann. Die Hülse 7 ist mittels in Aussparungen oder in Durchbrüche wie den Durchbruch 27 eingedrungene Moldmasse, welche nach Aushärten das Kunststoffmaterial 20 bildet, drehfest mit dem Kunststoffmantel 17 verbunden.The web 24 is polygonal in this embodiment, as the polygonal section 28, in particular square in cross-section or hexagonal shaped, so that the bolt 8 when passing through the sleeve 7 and when striking against the radially inwardly extending web 24 - in particular about the longitudinal axis 30 -. rotatably connected to the sleeve 7 can be connected. The sleeve 7 is connected by means of recesses or openings such as the opening 27 penetrated molding compound, which forms the plastic material 20 after curing, rotatably connected to the plastic sheath 17.

Dargestellt ist auch die in Figur 1 bereits dargestellte Dichtung 22, welche in diesem Ausführungsbeispiel als elastisch ausgebildeter Dichtring in eine Nut 29 eingefügt werden kann. Die Nut 29 ist in der Kunststoffummantelung 17 ausgebildet und erstreckt sich radial nach innen zur Längsachse 30 hin.Shown is also the in FIG. 1 already illustrated seal 22, which can be inserted in this embodiment as an elastically formed sealing ring in a groove 29. The groove 29 is formed in the plastic sheath 17 and extends radially inwardly toward the longitudinal axis 30.

Der elektrische Anschluss 6, welcher in diesem Ausführungsbeispiel die Kontermutter 13, die Dichtung 22, die Kunststoffummantelung 17, die Hülse 7, den Bolzen 8 und die Kontermutter 11 umfasst, ist ausgebildet, durch den Durchbruch 5 in der Gehäusewand 21 hindurchgeführt und in dem Durchbruch 5 angeordnet zu werden.The electrical connection 6, which comprises in this embodiment, the lock nut 13, the seal 22, the plastic sheath 17, the sleeve 7, the bolt 8 and the lock nut 11 is formed, passed through the opening 5 in the housing wall 21 and in the opening 5 to be arranged.

Der elektrische Anschluss 6, insbesondere die Kunststoffummantelung 17, ist mit der Dichtung 22 ausgebildet, gegen die Gehäusewand 21 abzudichten, sodass kein Schmutz oder Feuchtigkeit in den in Figur 1 dargestellten Hohlraum 3 des Gehäuses 2 eindringen kann.The electrical connection 6, in particular the plastic casing 17, is formed with the seal 22, to seal against the housing wall 21, so that no dirt or moisture in the in FIG. 1 shown cavity 3 of the housing 2 can penetrate.

Vorteilhaft kann die Hülse 7 beim Verschrauben der Kontermuttern 11 und 13 entlang der Längsachse 30 gestaucht und so radial nach außen tonnenförmig verformt werden. So kann ein durch zueinander verschiedene Temperaturausdehnungen der Hülse 7 und des Kunststoffmantels 17, bei Temperaturschwankungen eventuell entstehender Spalt zwischen der Hülse 7 und der Kunststoffummantelung 17 vermieden werden, da die Hülse 7 beim tonnenförmigen Verstauchen die Kunststoffummantelung 17 federnd radial nach außen pressen kann.Advantageously, the sleeve 7 when screwing the locknuts 11 and 13 along the longitudinal axis 30 compressed and thus deformed barrel-shaped radially outward. Thus, a mutually different temperature expansions of the sleeve 7 and the plastic sheath 17, with temperature fluctuations possibly resulting gap between the sleeve 7 and the plastic sheath 17 can be avoided, since the sleeve 7 can press the plastic sheath 17 at the barrel-shaped Verstauchen resiliently radially outward.

Die Kunststoffummantelung 17 ist beispielsweise durch einen Thermoplast gebildet. Vorteilhafte Kunststoffe für die Kunststoffummantelung 17 sind beispielsweise Polypropylen, PPA (PPA = Polyphtalamid), ABS (ABS = Acrylnitril-Butadien-Styrol), Polyamid, PLA (PLA = Poly-Lactid-Acid), PMMA (PMMA = Poly-Methyl-Meth-Acrylat), PET (PET = Poly-Ethylen-Terephtalat) oder Polystyrol.The plastic sheath 17 is formed for example by a thermoplastic. Advantageous plastics for plastic coating 17 are, for example, polypropylene, PPA (PPA = polyphtalamide), ABS (ABS = acrylonitrile-butadiene-styrene), polyamide, PLA (PLA = poly-lactide-acid), PMMA (PMMA = poly-methyl-meth Acrylate), PET (PET = poly-ethylene terephthalate) or polystyrene.

Figur 3 zeigt ein Ausführungsbeispiel für einen elektrischen Anschluss 50, welcher anstelle des elektrischen Anschlusses 6 an dem Steuergerät 1 in Figur 1 verwirklicht sein kann. FIG. 3 shows an embodiment of an electrical connection 50, which instead of the electrical connection 6 to the control unit 1 in FIG. 1 can be realized.

Der Anschluss 50 weist eine Hülse 7 auf, welche wie die Hülse 7 in Figur 1 ausgebildet ist. Der Anschluss 50 weist auch einen sich längserstreckenden, zylindrisch geformten Bolzen 40 auf, welcher einen Kopf 41 aufweist, der an den Bolzen 40 angeformt ist. Der Kopf 41 ist ausgebildet, beim Durchführen des Bolzens 40 durch die Hülse 7 die Stromschiene 25 formschlüssig gegen die Stirnfläche 16 zu pressen. Dazu weist der Kopf 41 eine größere Radialerstreckung auf als der Bolzen 40. Der Bolzen 40 weist im Bereich eines von dem Kopf 41 abgewandten Endes eine als Sackloch 46 ausgebildete Öffnung auf, in der ein Innengewinde 44 ausgebildet ist. Die Längserstreckung des Bolzens 40 überragt entlang der Längsachse 30 die Stirnfläche 15 oder den Kabelschuh 10 nicht, so dass eine Schraube 43 in das Sackloch 46 eingedreht werden kann und mit einem Schraubenkopf 42 formschlüssig den Kabelschuh 10 des Anschlusskabels 9 gegen die Stirnfläche 15 pressen kann.
Der Bolzen 40 weist einen sich radial nach außen erstreckende Dichtung 47, insbesondere eine ringförmige Elastomerdichtung auf, welche ausgebildet ist, den Bolzen gegen eine Innenwand der Hülse 7 abzudichten.The terminal 50 has a sleeve 7 which, like the sleeve 7 in FIG. 1 is trained. The terminal 50 also has a longitudinally extending, cylindrically-shaped bolt 40 having a head 41 formed on the bolt 40. The head 41 is formed when pressing the bolt 40 through the sleeve 7 to press the bus bar 25 positively against the end face 16. For this purpose, the head 41 has a greater radial extent than the bolt 40. The bolt 40 has in the region of an end remote from the head 41 an opening formed as a blind hole 46 in which an internal thread 44 is formed. The longitudinal extension of the bolt 40 does not project beyond the longitudinal axis 30 of the end face 15 or the cable lug 10, so that a screw 43 can be screwed into the blind hole 46 and with a screw head 42 can positively press the cable lug 10 of the connecting cable 9 against the end face 15.
The bolt 40 has a radially outwardly extending seal 47, in particular an annular elastomeric seal, which is designed to seal the bolt against an inner wall of the sleeve 7.

Der elektrische Anschluss 50 weist einen Kunststoffmantel 45 auf, welcher die Hülse 7 entlang ihrer Längserstreckung entlang der Längsachse 30 umschließt.The electrical connection 50 has a plastic jacket 45 which encloses the sleeve 7 along its longitudinal extent along the longitudinal axis 30.

Claims (10)

  1. Controller (1) for a motor vehicle, comprising a housing (2), wherein the housing (2) encloses a hollow space (3), wherein the controller has an electrical power device (4), in particular an inverter, which is arranged in the hollow space (3) and a housing wall (21) of the housing (2) has an aperture (5), wherein an electrical connection (6) of the controller (1) is guided through the aperture (5), wherein the electrical connection (6) has an electrically conductive sleeve (7) and a bolt (8), wherein the sleeve (7) is electrically connected to the power device (4) in a releasable manner, wherein the bolt (8) is guided through the sleeve (7) and is designed to firmly hold an end section (10) of an electrical connection cable (9) and to press the end section (10) against a sleeve end of the sleeve (7), which sleeve end is in the form of an end face (15, 16), and to connect the electrical connection cable (9) to the connection (6) in this way, wherein the sleeve (7), at least on a longitudinal section which is guided through the housing wall (21), is sheathed by a plastic insulation (17), characterized in that the sleeve (7) has at least one aperture (27) in which the plastic material (20) of the plastic insulation (17) extends into the interior of the sleeve and is designed to seal off the sleeve (7) from the bolt (8).
  2. Controller (1) according to Claim 1, characterized in that the housing is a plastic housing, wherein the plastic insulation (17) which sheaths the sleeve (7) is formed by a plastic wall of the plastic housing, wherein the sleeve (7) is injection-moulded into the plastic wall.
  3. Controller (1) according to Claim 1 or 2, characterized in that the bolt (8, 50) has a pressing device (11, 12, 13, 14, 43, 44) which is designed to press the end section (10) of the connection cable (9) against the end face (15, 16) of the sleeve (7).
  4. Controller (1) according to one of the preceding claims, characterized in that the pressing device of the bolt (8) has a thread (12, 14, 44) and a screw element which is designed to engage into the thread in a screwing manner and to press the end section against the end face in an interlocking and/or force-fitting manner.
  5. Controller (1) according to Claim 4, characterized in that the thread (12, 14, 44) is an external thread (12, 14) or an internal thread (44).
  6. Controller according to one of the preceding claims, characterized in that the sleeve (7) is of hollow-cylindrical design.
  7. Controller according to one of the preceding claims, characterized in that the sleeve (7), in particular along a longitudinal extent (30) of the sleeve (7), has a greater electrical conductivity than the bolt (8, 40).
  8. Controller (1) according to one of the preceding claims, characterized in that the sleeve (7) is a copper sleeve, and the bolt (8) is a bolt containing iron.
  9. Controller (1) according to one of the preceding claims, characterized in that the bolt (8), by way of at least one end section, protrudes out of the sleeve (7) and has the pressing device (12, 13) at the protruding end section.
  10. Controller (1) according to one of the preceding claims, characterized in that the plastic insulation (17) is formed by a thermoplastic.
EP14789814.2A 2013-12-16 2014-10-23 Control device comprising a low-resistance electrical connection Active EP3084887B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013226106.3A DE102013226106A1 (en) 2013-12-16 2013-12-16 Control unit with a low-resistance electrical connection
PCT/EP2014/072781 WO2015090688A1 (en) 2013-12-16 2014-10-23 Control device comprising a low-resistance electrical connection

Publications (2)

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EP3084887A1 EP3084887A1 (en) 2016-10-26
EP3084887B1 true EP3084887B1 (en) 2018-12-12

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EP14789814.2A Active EP3084887B1 (en) 2013-12-16 2014-10-23 Control device comprising a low-resistance electrical connection

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EP (1) EP3084887B1 (en)
CN (1) CN105830280B (en)
DE (1) DE102013226106A1 (en)
WO (1) WO2015090688A1 (en)

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WO2024002574A1 (en) * 2022-06-30 2024-01-04 Robert Bosch Gmbh High-voltage interface

Also Published As

Publication number Publication date
CN105830280B (en) 2018-11-02
DE102013226106A1 (en) 2015-06-18
WO2015090688A1 (en) 2015-06-25
EP3084887A1 (en) 2016-10-26
CN105830280A (en) 2016-08-03

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