EP3379652B1 - Dispositif pour contacter un conducteur électrique et procédé à cet effet - Google Patents

Dispositif pour contacter un conducteur électrique et procédé à cet effet Download PDF

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Publication number
EP3379652B1
EP3379652B1 EP17305336.4A EP17305336A EP3379652B1 EP 3379652 B1 EP3379652 B1 EP 3379652B1 EP 17305336 A EP17305336 A EP 17305336A EP 3379652 B1 EP3379652 B1 EP 3379652B1
Authority
EP
European Patent Office
Prior art keywords
conductor
container
insulation
cable lug
stripped
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
EP17305336.4A
Other languages
German (de)
English (en)
Other versions
EP3379652A1 (fr
Inventor
Roy Karchs
Helmut Steinberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP17305336.4A priority Critical patent/EP3379652B1/fr
Publication of EP3379652A1 publication Critical patent/EP3379652A1/fr
Application granted granted Critical
Publication of EP3379652B1 publication Critical patent/EP3379652B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive 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
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/187—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping combined with soldering or welding
    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve

Definitions

  • the invention relates to an arrangement for contacting an electrical conductor according to the preamble of patent claim 1 and to a method for contacting an electrical conductor according to claim 2.
  • a large number of electrical conductors for example stranded conductors, and contact elements made of electrically conductive material connected to them are used. Electrical connections must be made between the voltage source, for example a battery, and actuators, sensors, control elements, etc.
  • the voltage source for example a battery
  • contact elements are elements made of metal, for example cable lugs, which are designed in such a way that they can be crimped onto or welded to a stripped conductor end.
  • the conductor and the contact element are non-positively and / or cohesively connected to one another.
  • Electrical conductors made of copper are increasingly being replaced by conductors made of aluminum or an aluminum alloy, especially in the automotive industry.
  • aluminum is a lighter and cheaper material with good electrical properties.
  • the contact elements mostly consist of copper or a copper alloy.
  • the metals are also to be named representative of their alloys.
  • the stripped aluminum conductor In order to establish a perfect electrically conductive connection between a contact element made of copper and an aluminum conductor, the stripped aluminum conductor must be freed from the non-conductive oxide layer, which forms when aluminum comes into contact with oxygen, before electrical connection. This can be achieved, for example, by welding the aluminum conductor to the contact element.
  • the Welding also has the advantage that the conductor and the contact element are materially connected to one another, so that any cold flow of the aluminum has no effect on the quality of the connection.
  • shrink tubing is often brought around the connection point, as is the case for example in DE 3 319 880 A1 is described.
  • the inside of the shrink tube is provided with a hot-melt adhesive, for example, and then contracts around the connection point by heating.
  • the material connection between the shrink tube and the adhesive is not optimally resistant to strong temperature fluctuations to which the conductors and contact elements can be exposed.
  • the shrink tubing process also has the disadvantage that it is relatively time-consuming and expensive.
  • connection In addition to media tightness, the mechanical stability of the connection with the contact element is particularly important for stranded conductors or battery cables with large cross-sections.
  • the connection must be resistant to vibrations and a possible cold flow of the aluminum.
  • the EP 2 662 934 A2 describes a connection between an electrical cable, which has an aluminum conductor, and a contact part made of copper.
  • an aluminum connection cap is first pushed onto the stripped end of the conductor, and one end is pressed with the conductor.
  • the connection cap has a sleeve and an end wall.
  • the contact part has a protrusion with a contact surface with a three-dimensional shape.
  • To establish the connection between the contact part and the conductor of the cable the contact part is placed with its contact surface on the end wall of the connection cap.
  • An electrical voltage is then applied to the contact part and the connection cap. Both parts are heated as a result. They are pressed against each other at the same time. Because of the different materials of the contact part and connection cap and conductor, the sleeve having the contact surface is pressed through the end wall of the sleeve into the conductor and welded to the same.
  • From the DE 10 2004 050 676 A1 shows a cable lug which has a hollow cylinder part with two sections with different diameters.
  • the cable lug is connected to an insulated electrical conductor in that the stripped conductor is inserted into the section of the hollow cylinder part with the smaller diameter and that a single conductor seal surrounding the insulated line is arranged in the section with the larger diameter.
  • the section of the hollow cylinder part surrounding the conductor is crimped on the conductor. Then the section of the hollow cylinder part surrounding the single conductor seal is also crimped on the enclosed parts.
  • the invention is based on the object of providing an arrangement for contacting an electrical conductor and a corresponding method which meet the above-mentioned requirements.
  • both the stripped end of the conductor and the end of the insulation of the conductor are advantageously crimped with one and the same cable lug in a non-positive manner. This prevents a relative movement between the insulation of the conductor and the cable lug. Any vibrations of the system in which the electrical conductor is attached, for example an engine compartment of a motor vehicle, are absorbed by the insulation crimp. Further cares the insulation crimp for strain relief of the electrical conductor.
  • the connection between the end of the line and the cable lug is accordingly protected from mechanical loads that can occur during use and is particularly durable.
  • the connection between the cable lug and the insulation is also completely sealed against moisture, oxygen, etc. by the sealing element pressed in between the wall of the container and the insulation of the conductor by the crimp wings of the insulation crimp. The electrical conductor and the contact point between the conductor and the contact element are protected against corrosion from environmental influences.
  • the arrangement according to the invention can advantageously be used for conductors with large cross-sections, which must be contacted reliably and consistently.
  • the object of the invention is also achieved by a method according to claim 2.
  • a cable lug 1 of the arrangement according to the invention is shown in the unassembled state in Fig. 1 shown.
  • the cable lug 1 has a pot-like, essentially cylindrical container 2, which is closed at its bottom 2a.
  • the container 2 represents a receptacle for an electrical conductor to be connected to the cable lug 1.
  • the container 2 can also have a conical shape narrowing towards the bottom 2a, or have other shapes suitable for holding the ladder.
  • the cable lug 1 consists for example of copper.
  • the container 2 is open on one side, opposite the bottom 2a.
  • the edge 2b forms a trumpet-shaped opening.
  • a flat contact end 3 is attached to the edge 2b.
  • the cable lug 1 can be connected to an electrical element, for example a battery terminal or the body of a motor vehicle.
  • the cable lug 1 can be screwed onto the electrical element, for which purpose a screw can be inserted through a bore or a hole 4 in the contact end 3.
  • the tab 5 with the crimping wings 6 and 7 represents an insulation crimp.
  • the transition between the edge 2b of the container 2 and the tab 5 is designed to be relatively narrow, so that the tab 5 can be bent away in the direction of the bottom 2a of the container 2, as indicated by the arrow 5a.
  • Fig. 2 is an embodiment of the arrangement according to the invention with an electrical conductor 10 and a cable lug 1 attached to it Fig. 1 shown.
  • the electrical conductor 10 is, for example, a stranded conductor made of aluminum.
  • the arrangement can, however, also have other types of electrical conductors, for example individual conductors.
  • Fig. 3 an embodiment of the arrangement according to the invention is shown in the assembled state with a conductor 10, the cable lug 1 being shown in section for a better overview.
  • the stranded conductor 10 consists of a large number of individual electrical conductors 11 and is surrounded by insulation 12.
  • the individual conductors 11 consist, for example, of aluminum.
  • the insulation 12 consists, for example, of silicone or polyvinyl chloride.
  • the conductor 10 is freed from the insulation 12 at its end.
  • the stripped end of the conductor 10 is inserted into the container 2 of the cable lug 1.
  • the end of the insulation 12 also extends a little way into the container 2.
  • the stripped part of the conductor 10 is completely covered by the cable lug 1.
  • the container 2 is crimped onto the stripped end of the conductor 10.
  • the end face 13 of the conductor 10 is welded to the bottom 2a of the container 2 of the cable lug 1.
  • the tab 5 of the cable lug 1 is bent approximately parallel to the longitudinal axis of the electrical conductor 10, so that the tab 5 points away from the stripped end of the conductor 10.
  • the two crimping wings 6 and 7 of the tab 5 are crimped around the electrical conductor 10 in the region of the end of the insulation 12.
  • the crimping wings 6 and 7 can extend somewhat into the container 2, as in FIG Fig. 3 shown.
  • the crimping wings 6 and 7 are accordingly partially located between the wall of the container 2 and the insulation 12 of the conductor 10.
  • a rotationally symmetrical sealing element 14 is arranged, which seals the stripped end of the conductor 10 from the environment.
  • the sealing element 14 is firmly pressed into the intermediate space by means of the two crimping wings 6 and 7 of the tab 5 and held there.
  • the method according to the invention for producing the arrangement shown above for sealing the connection between the contact element and the electrical conductor can be carried out, for example, as follows: First, a sealing element 14 is pushed onto the insulation 12 of the conductor 10. The end of the conductor 10 is stripped and inserted into the container 2 of the cable lug 1. The end face 13 of the conductor 10 is led to the bottom 2a of the container 2. The conductor 10 is stripped so far that the end of the insulation extends into the container 2. The cable lug 1 is then frictionally connected to the stripped conductor end by crimping the container 2. For example, the container 2 are pressed into a hexagon in its lower area close to the ground.
  • the upper area of the container 2 close to the edge is left rotationally symmetrical. Then the end face 13 of the conductor 10, or the end faces 13 of the individual conductors 11 of the stranded conductor 10, are welded to the bottom 2a of the container 2. This can take place, for example, in that a weld nugget is first produced thermally on the face of the conductor and then the conductor 10 is connected to the bottom 2a of the container 2 in a materially bonded manner, for example by friction stir welding.
  • the welded area is indicated by reference number 15 in Fig. 3 indicated.
  • the conductor 10 is now materially and non-positively connected to the cable lug 1.
  • the sealing element 14 is then pushed into the container 2 between its wall and the insulation 12 of the conductor 10, so that it rests in a rotationally symmetrical manner in the trumpet-shaped area of the container 2. Finally, the tab 5 of the cable lug 1 is bent in the direction of the insulation 12 of the conductor 10, so that the tab 5 continues the wall of the container 2 continuously.
  • the crimping wings 6 and 7 of the tab 5 are crimped around the insulation 12.
  • the space between the wall of the container 2 and the insulation 12 of the conductor 10 is closed to the outside by the crimping wings 6 and 7.
  • the crimping wings 6 and 7 are partially inserted into the space between them.
  • the sealing element 14 is pressed firmly into the space so that the stripped conductor end is completely sealed off from the environment.
  • the method shown for producing the contact can advantageously take place in an automated production process or be integrated therein.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Claims (2)

  1. Dispositif destiné à la mise en contact d'un conducteur (10) électrique qui comporte une isolation (12), une cosse de câble (1) étant sertie autour d'une extrémité dénudée du conducteur (10), et un côté frontal (13) du conducteur (10) étant assemblé par soudage à la cosse de câble (1),
    la cosse de câble (1) comportant un contenant (2) en forme de pot qui est fermé au niveau d'un fond (2a) du contenant (2) et qui est ouvert au niveau d'un bord (2b) sur un côté opposé au fond (2a), une extrémité de contact (3) plate étant mise en place au niveau du bord (2b), caractérisé en ce qu'une patte (5) servant de sertissage d'isolation est mise en place en face du bord (2b) et a deux ailes de sertissage (6, 7),
    - en ce que l'extrémité dénudée du conducteur (10) est immobilisée dans le contenant (2) par sertissage et soudage, une extrémité de l'isolation (12) arrivant jusque dans le contenant (2),
    - en ce que les ailes de sertissage (6, 7) de la patte (5) sont serties tout autour de l'extrémité de l'isolation (12) du conducteur (10), et
    - en ce qu'un élément d'étanchéité (14) de forme annulaire est disposé dans un espace intermédiaire entre une paroi du contenant (2) et l'isolation (12) de l'extrémité dénudée du conducteur (10), et est pressé dans l'espace intermédiaire par les ailes de sertissage (6, 7) de la patte (5) de sorte que le contenant (2) est obturé de façon étanche.
  2. Procédé destiné à la mise en contact d'un conducteur (10) électrique qui comporte une isolation (12), une cosse de câble (1) étant sertie autour d'une extrémité dénudée du conducteur (10), et un côté frontal (13) du conducteur (10) étant assemblé par soudage à la cosse de câble (1), un élément d'étanchéité (14) de forme annulaire étant enfilé sur l'isolation (12) du conducteur (10),
    l'extrémité dénudée du conducteur (10) étant introduite dans un contenant (2) en forme de pot de la cosse de câble (1) qui est fermé au niveau d'un fond (2a) et qui est ouvert au niveau d'un bord (2b) sur son côté opposé au fond (2a) de telle sorte qu'une extrémité de l'isolation (12) du conducteur (10) arrive jusque dans le contenant (2), et dans lequel l'extrémité dénudée du conducteur (10) est immobilisée par sertissage et soudage, l'élément d'étanchéité (14) de forme annulaire étant poussé dans un espace intermédiaire entre une paroi du contenant (2) et l'extrémité dénudée du conducteur (10),
    - en ce que, au niveau du bord (2b), il est mis en place une extrémité de contact (3) plate et, en face de celle-ci, une patte (5) servant de sertissage d'isolation qui a deux ailes de sertissage (6, 7) qui sont serties autour de l'extrémité de l'isolation (12) du conducteur (10), l'élément d'étanchéité (14) de forme annulaire étant pressé par les ailes de sertissage (6, 7) de la patte entre la paroi du contenant (2) et l'extrémité de conducteur dénudée de sorte que le contenant (2) est obturé de façon étanche.
EP17305336.4A 2017-03-24 2017-03-24 Dispositif pour contacter un conducteur électrique et procédé à cet effet Active EP3379652B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17305336.4A EP3379652B1 (fr) 2017-03-24 2017-03-24 Dispositif pour contacter un conducteur électrique et procédé à cet effet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17305336.4A EP3379652B1 (fr) 2017-03-24 2017-03-24 Dispositif pour contacter un conducteur électrique et procédé à cet effet

Publications (2)

Publication Number Publication Date
EP3379652A1 EP3379652A1 (fr) 2018-09-26
EP3379652B1 true EP3379652B1 (fr) 2021-04-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17305336.4A Active EP3379652B1 (fr) 2017-03-24 2017-03-24 Dispositif pour contacter un conducteur électrique et procédé à cet effet

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EP (1) EP3379652B1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3656092A (en) * 1970-08-07 1972-04-11 Amp Inc Terminal device for welded termination of electrical leads
DE3319880A1 (de) 1983-06-01 1984-12-06 Compakta Werke Baustoff-GmbH, 8225 Traunreut Elastische fluessigkeitsdichte verbindung einer metallkabelisolierung zur metallischen anschlussschelle
DE29806778U1 (de) * 1998-04-15 1999-09-02 Grote & Hartmann Schraubanschluß
JP2002216862A (ja) * 2001-01-19 2002-08-02 Yazaki Corp 端子と電線の接続部の防水構造及び防水方法
JP4326797B2 (ja) * 2002-12-26 2009-09-09 株式会社オートネットワーク技術研究所 電線と端子金具との接続構造
DE102004050676A1 (de) * 2004-10-18 2006-04-20 Volkswagen Ag Kabelschuh
DE102011017070B4 (de) * 2011-04-14 2013-10-31 Auto-Kabel Management Gmbh Herstellung eines elektrischen Kabels sowie Verfahren zur Herstellung einer Verbindung
EP2621021A1 (fr) * 2012-01-25 2013-07-31 Intercable GmbH Cosse destinée à relier un élément conducteur à l'aide d'un câble en aluminium
AT512881B1 (de) * 2012-05-11 2014-03-15 Gebauer & Griller Verbindung eines elektrischen Kabels mit einem Kontaktteil und Verfahren zur Herstellung dieser Verbindung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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