EP3270464B1 - Procede de raccordement d'un element de contact a un conducteur electrique - Google Patents

Procede de raccordement d'un element de contact a un conducteur electrique Download PDF

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Publication number
EP3270464B1
EP3270464B1 EP16305913.2A EP16305913A EP3270464B1 EP 3270464 B1 EP3270464 B1 EP 3270464B1 EP 16305913 A EP16305913 A EP 16305913A EP 3270464 B1 EP3270464 B1 EP 3270464B1
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EP
European Patent Office
Prior art keywords
contact element
conductor
stranded conductor
tab
contact
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
EP16305913.2A
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German (de)
English (en)
Other versions
EP3270464A1 (fr
Inventor
Helmut Steinberg
Roy Karchs
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
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Nexans SA
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Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to ES16305913T priority Critical patent/ES2699917T3/es
Priority to EP16305913.2A priority patent/EP3270464B1/fr
Publication of EP3270464A1 publication Critical patent/EP3270464A1/fr
Application granted granted Critical
Publication of EP3270464B1 publication Critical patent/EP3270464B1/fr
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R4/183—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 for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—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 for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion

Definitions

  • the invention relates to a method for the electrically conductive connection of a contact element to an electrical conductor according to the preamble of patent claim 1.
  • Such a method is for example from the EP 2 747 205 A1 out.
  • Aluminum-containing conductors are being used more and more frequently as a replacement for copper conductors, for example in the automotive and aerospace industries.
  • the aluminum-containing conductors used therein are made of either aluminum or an aluminum alloy. In the following, for the sake of simplicity, only aluminum is mentioned.
  • a significant advantage of such electrical conductors is compared to copper lighter weight.
  • the lower electrical conductivity of the aluminum compared to copper, however, is of minor importance for most applications.
  • a disadvantage of these conductors is the fact that aluminum reacts with oxygen, forming an electrically insulating oxide layer surrounding the conductor and in particular each of the wires of a corresponding stranded conductor.
  • EP 2 001 085 B1 is a method for producing an electrically conductive connection between an aluminum-containing electrical stranded conductor and a contact portion of an electrical or electronic device described.
  • a contact element is fixed in an electrically conductive manner by crimping.
  • the contact element is then connected to the contact part of the device.
  • the oxide layers of the stranded conductor are broken, so that an effective electrically conductive connection between the contact element and conductor results.
  • This method has proven itself in practice. However, the corresponding compound can be affected in unfavorable cases with larger shocks, such as occur during operation of a motor vehicle.
  • the WO 2013/151185 A1 describes a contact element which is attached to the end of an electrical conductor freed from its insulation.
  • the contact element has a contact zone serving the electrical connection and two attachment regions.
  • the contact element is crimped onto the conductor with one fastening region, while the second fastening region is wrapped around the insulation still present on the conductor. Finally, a material serving as corrosion protection is formed around the crimp area.
  • the material has two layers of electrically conductive material, between which a layer of insulating material or plastic is attached.
  • the one metallic layer has resilient properties. It serves to press a pin, which is made of the material, firmly against the wall of a socket.
  • the other metallic layer is made of good conductive material.
  • JP 2009 231079 A a method is described, with which a contact element designed as a cable lug, which has a fastening part, is crimped with this fastening part to an aluminum wire consisting of electrical conductors. Oxide layers surrounding the aluminum wires are destroyed by ultrasound, and the attachment part of the contact element is then crimped around the conductor reduced in diameter at its end.
  • the US 2013/0309903 A1 describes a method by which a contact element can be attached by crimping to an electrical conductor. It consists of conventional electrically conductive material.
  • the contact element has a for the Crimping provided fastening part and provided for example with a through hole connecting part. Between the fastening part and the connecting part, the contact element has a projection which is approximately V-shaped and projects on one side from the contact element. The projection serves to limit the conductor, which rests in the mounting position below the projection.
  • EP 2 747 205 A1 shows a method in which an aluminum-containing, consisting of wires electrical stranded conductor at its end by destroying the wires thereof optionally surrounding oxide layers by ultrasonic welding is electrically connected to a contact element.
  • An integrally connected to the contact element fastener is crimped around the stranded conductor in addition to the electrical contact point between the stranded conductor and the contact element.
  • the electrically conductive connection between the contact element and the conductor and the mechanical discharge of the contact point using the one-piece contact element are separated.
  • the electrically conductive connection is made by ultrasonic welding so that any existing oxide layers are broken, so that the electrically conductive material of the conductor is connected directly to the contact element.
  • This method has proven itself in practice. The welding of the stranded conductor with the contact element is relatively expensive.
  • the invention has for its object to make the initially described method so that the contact element can be attached to the electrical conductor with reduced effort.
  • Sprung electrically conductive material is advantageously an electrically good conductive metal, such as stainless steel.
  • a corresponding contact element can be coated, at least on the side intended for contact with the stranded conductor, with a metal which is highly conductive, in particular copper.
  • conductor For attaching the contact element at the end of the stranded conductor - hereinafter referred to only as "conductor” - an electrical contact surface is initially generated on the end face, the total of the aluminum of the conductor, ie in particular with the aluminum of the wires thereof, is connected.
  • different methods are known which work almost exclusively with the supply of heat in order to melt the aluminum of the conductor. This process step is the only one with which heat is supplied to the conductor. It serves to prepare the conductor end for the electrically effective attachment of the contact element to the same.
  • a corresponding method is for example in the DE 10 2011 089 207 A1 described. In this method, the material of the conductor is melted at its end by means of ultrasound.
  • the contact element is fixed purely mechanically fixed and immovable and electrically conductively connected to the contact surface of the conductor.
  • the approximately or substantially strip-shaped contact element consists entirely of resilient metal.
  • metal can be used with advantage stainless steel.
  • the contact element may be coated overall with an electrically highly conductive material, for example with copper.
  • the surfaces of the contact element are coated with the highly conductive material, which rest in the assembled state on the conductor or on its contact surface.
  • obliquely projecting from the same tab consists of the same resilient material as the contact element.
  • the angle at which the tab protrudes from the contact element is between 84 ° and 87 °. It is essential that the slope of the tab has in the direction of the fastening part of the contact element.
  • the contact element To attach the contact element to the conductor, the same is arranged parallel to the conductor, in such a way that it lies with its end against the conductor on which the fastening part is located. In this position, the tab is still relatively loose at the contact surface of the conductor. The contact element is then displaced in the axial direction of the conductor, whereby the tab is bent by the conductor against its spring force and thereby pressed with increased force to the contact surface of the conductor. In this position, which is kept stable, the fastening part of the contact element is firmly and immovably formed around the conductor. This end position of the contact element is maintained in the long run and the tab is permanently pressed against the contact surface of the conductor. The fastening part will be fixed by crimping on the conductor.
  • the contact element may also have a second attachment part attached adjacent to the first attachment part.
  • the second attachment member may be wrapped around and secured to a portion of the conductor which is provided with insulation.
  • Fig. 1 schematically the end of an aluminum-containing electrical conductor 1 is shown, which has a number of combined into one unit wires 2.
  • the wires 2 are stranded together, for example.
  • the conductor 1 is surrounded by an insulation 3, which is at the end of the same removed.
  • On the front side of the conductor 1 is an electrically conductive, indicated by a cross-hatching contact surface 4 is present, which is electrically conductively connected to the aluminum of all wires 2 of the conductor 1.
  • the contact surface 4 is generated in a known technique by supplying heat, for example in an ultrasonic system.
  • Fig. 3 shows an electrical contact element 5, which is designed substantially or strip-shaped.
  • the contact element 5 is made of a resilient metal, for example made of stainless steel. It has at its one end a fastening part 6, which is designed according to the drawing representation wider than the remaining part of the contact element 5 and serves to fix the contact element 5 on the conductor 1.
  • a tab 7 is cut out so far, for example by punching, that a transverse edge 8 is maintained.
  • the end 9 of the contact element 5 is used to connect secondary contacts or conductors.
  • the tab 7 is bent around the edge 8, so that it protrudes at an angle ⁇ from the contact element 5, which is between 80 ° and 89 °.
  • the angle ⁇ is more preferable Embodiment between 84 ° and 87 °.
  • the tab 7 is in the corresponding inclination due to their resilient material under spring tension.
  • the slope of the tab 7 points in the direction of the fastening part 6 of the contact element 5.
  • the size of the angle a also depends on the resilient material used for the contact element 5.
  • the contact element 5 can according to Fig. 4 also have a second fastening part 10 which is mounted adjacent to the fastening part 6. It can be used with advantage for additional definition of the contact element 5 on the conductor 1 in its provided with the insulation 3 area.
  • the contact element 5 For mounting the contact element 5 on the conductor 1, for example, proceed as follows: The contact element 5 is corresponding Fig. 6 with parallel course to the conductor 1 is applied to the same. The tab 7 then abuts the contact surface 4, which is located on the front side of the conductor 1. The oblique course of the tab 7 is in Fig. 6 slightly exaggerated to clearly show the corresponding starting position of the contact element 5. Thereafter, the contact element 5 is displaced in the axial direction of the conductor 1 under further contact with the same with pressure. As a result, the tab 7 is bent against its spring tension around the edge 8 so that it is pressed against the contact surface 4 with increased force.
  • the fastening part 6 is formed around the conductor 1 so that the contact element 5 is firmly and immovably fixed to the conductor 1, as it is in Fig. 7 is shown. This can be done for example by crimping.
  • the possibly existing second fastening part 10 can be set in an analogous manner in addition to the insulation 3 on the conductor 1. The positions of the contact element 5 on the conductor 1 and in particular the tab 7 on the contact surface 4 are thus ensured in total over time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Claims (4)

  1. Procédé de raccordement électro-conducteur d'un élément de contact (5) en matériau électro-conducteur globalement en forme de bande à un conducteur électrique à torons (1) contenant de l'aluminium, qui comprend une pluralité de fils rassemblés en une unité, avec lequel un élément de fixation, relié d'une seule pièce avec l'élément de contact (5), est serti autour du conducteur à torons (1) en laissant libre sa face frontale au niveau de son extrémité,
    caractérisé en ce que
    - un élément de contact (5) constitué d'un matériau élastique est utilisé, qui est incliné avec un angle (α) entre 80° et 89° par rapport une patte (7) écartée de celui-ci et soumise à une tension de ressort, l'inclinaison de la patte (7) étant orientée en direction de l'élément de fixation (6) de l'élément de contact (5),
    - avant la fixation de l'élément de contact (5) au conducteur à torons (1), une surface de contact électro-conductrice (4) est réalisée sur la face frontale de celui-ci, qui est reliée de manière électro-conductrice avec l'aluminium des fils (2) du conducteur à torons (1),
    - l'élément de contact (5) est ensuite posé contre le conducteur à torons (1) dans une position dans laquelle la patte (7) s'appuie contre la surface de contact (4) de celui-ci,
    - l'élément de contact (5) est ensuite comprimé dans la direction axiale du conducteur à torons (1) de façon à ce que la patte (7) est déformée par la surface de contact (4) contre son action élastique et
    - l'élément de contact (5) est finalement serti, avec une extension parallèle à la direction axiale du conducteur à torons (1), au moyen de l'élément de fixation (6) dans une position ferme et inamovible autour du conducteur à torons (1) de façon à ce que la patte (7) écartée de l'élément de contact (5) soit comprimée de manière électro-conductrice et mécaniquement ferme contre la surface de contact (4) grâce à son action élastique.
  2. Procédé selon la revendication 1, caractérisé en ce que la patte (7) forme avec l'élément de contact (5) un angle (α) qui est entre 84° et 87°.
  3. Procédé selon la revendication 1, caractérisé en ce qu'un élément de contact (5) constitué d'un acier inoxydable avec des propriétés élastiques est utilisé.
  4. Procédé selon la revendication 3, caractérisé en ce que l'élément de contact (5) est revêtu, au moins sur sa surface destinée à s'appuyer contre le conducteur à torons (1), avec un matériau à bonne conductivité électrique, plus particulièrement avec du cuivre.
EP16305913.2A 2016-07-13 2016-07-13 Procede de raccordement d'un element de contact a un conducteur electrique Active EP3270464B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES16305913T ES2699917T3 (es) 2016-07-13 2016-07-13 Procedimiento para conectar un elemento de contacto en un conductor eléctrico
EP16305913.2A EP3270464B1 (fr) 2016-07-13 2016-07-13 Procede de raccordement d'un element de contact a un conducteur electrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16305913.2A EP3270464B1 (fr) 2016-07-13 2016-07-13 Procede de raccordement d'un element de contact a un conducteur electrique

Publications (2)

Publication Number Publication Date
EP3270464A1 EP3270464A1 (fr) 2018-01-17
EP3270464B1 true EP3270464B1 (fr) 2018-09-12

Family

ID=56507550

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Application Number Title Priority Date Filing Date
EP16305913.2A Active EP3270464B1 (fr) 2016-07-13 2016-07-13 Procede de raccordement d'un element de contact a un conducteur electrique

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EP (1) EP3270464B1 (fr)
ES (1) ES2699917T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6768742B2 (ja) * 2018-06-04 2020-10-14 矢崎総業株式会社 端子付き電線および端子付き電線の製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650723A (en) * 1985-06-26 1987-03-17 Daiichi Denshi Kogyo Kabushiki Kaisha Material for electric contacts
EP2001085B1 (fr) 2007-06-06 2010-05-19 Nexans Procédé de fabrication d'une liaison électrique conductrice
JP5017156B2 (ja) * 2008-03-24 2012-09-05 矢崎総業株式会社 電線に対する端子の圧着方法
DE102011089207B4 (de) 2011-12-20 2021-02-04 Lisa Dräxlmaier GmbH Verfahren zum Kontaktieren einer Litzenleitung mit einem Kontakt
WO2013151185A1 (fr) * 2012-04-04 2013-10-10 Yazaki Corporation Fil électrique fixé à une cosse
JP5880849B2 (ja) * 2012-05-15 2016-03-09 住友電装株式会社 圧着端子
EP2747205B1 (fr) 2012-12-18 2021-04-14 Nexans Procédé de liaison électrique conductrice d'un conducteur torsadé avec un élément de contact

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
ES2699917T3 (es) 2019-02-13
EP3270464A1 (fr) 2018-01-17

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