EP2579391B1 - Connection of two electrical conductors on an element forming an electrical terminal - Google Patents

Connection of two electrical conductors on an element forming an electrical terminal Download PDF

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Publication number
EP2579391B1
EP2579391B1 EP20120187597 EP12187597A EP2579391B1 EP 2579391 B1 EP2579391 B1 EP 2579391B1 EP 20120187597 EP20120187597 EP 20120187597 EP 12187597 A EP12187597 A EP 12187597A EP 2579391 B1 EP2579391 B1 EP 2579391B1
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EP
European Patent Office
Prior art keywords
core
conductor
connection member
electrical
crimping
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
EP20120187597
Other languages
German (de)
French (fr)
Other versions
EP2579391A1 (en
Inventor
Louis Chretien
Laurent Ferrieres
Arnaud Ponroy
Jacques Segoni
Bastien Baudel
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.)
Leoni Wiring Systems France SAS
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Leoni Wiring Systems France SAS
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Publication of EP2579391A1 publication Critical patent/EP2579391A1/en
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Publication of EP2579391B1 publication Critical patent/EP2579391B1/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
    • H01R4/58—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
    • 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
    • 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
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • 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
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for 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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • 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
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • 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
    • H01R4/02—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
    • 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
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • 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
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • 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
    • 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 present invention relates to the connection of two electrical conductors to an electrical lug element, in particular in a motor vehicle electrical circuit.
  • lug is an element electrically connected to the end of one or more electrical conductors and generally intended to be fixed on a pole element, electrical connection terminal or electrical ground.
  • a lug usually has a first attachment end on the pole member, electrical connection terminal or ground, generally ring-shaped, and a second deformable end to be crimped onto the end of at least one conductor.
  • the pod may be intended to conduct currents of intensities and tensions very varied.
  • a motor vehicle electrical circuit conventionally comprises electrical cables comprising twisted copper wire cores. Indeed, the good electrical conduction properties of copper are particularly suitable for use in motor vehicle electrical circuits.
  • Aluminum cored cables are less crimpable than copper-core cables, due in particular to the mechanical properties (mechanical relaxation) and chemical properties (formation of surface layers of alumina) of the aluminum wires.
  • the invention is in particular intended to allow the replacement of copper core cables by aluminum core cables in an electrical circuit intended in particular to equip a motor vehicle, this, on the one hand, without having to modify in any way consequently the lugs usually used and, secondly, allowing the connection of a first copper core cable and a second aluminum core cable on a common lug.
  • the subject of the invention is a method of electrically connecting at least first and second electrical conductors to an electrical lug element, each conductor comprising a conductive metal core, the lug having a deformable crimping end of the lug. core of at least one conductor according to claim 1.
  • the method according to the invention makes it possible to connect to a conventional common terminal a first aluminum core conductor and a second copper core conductor.
  • the first conductor provided with an aluminum core, can be connected to the conventional lug via the connecting member by welding the conductor on the first end of this connecting member.
  • the second conductor provided with a copper core, can be connected to the conventional terminal by crimping the deformable end of the terminal around the end of the core of the second conductor juxtaposed to the second end of the body. connection.
  • the aluminum core fixed on the first end of this connecting member, is spaced from the copper core, fixed on the second end of the connecting member, it avoids corrosion of electrochemical or galvanic origin that occurs when the aluminum and copper cores are in mechanical contact with each other.
  • the sealing means advantageously provide a seal against the usual aggressive agents, such as moisture, solvent projections and dust, which it is desired to avoid contact with the metal core.
  • the electrical connection member according to the invention comprising, on the one hand, a first end adapted to the welding of a conductor and, on the other hand, a second end adapted to crimping a conductor and a terminal conventional, allows to connect to the same lug an aluminum core conductor (welded to the first end of the connecting member) and a core conductor copper (crimped on the second end of the connecting member).
  • connection means comprise an electrical connection member.
  • the circuit 10 comprises three electrical conductors 12, 14 provided with ends connected, on the one hand, to a first pair of conventional electrical lugs 16, according to an electrical connection method according to the invention and, on the other hand, to a second pair of conventional electrical terminals 18, according to a method known per se.
  • Each lug 16, 18 comprises a first end A, generally ring-shaped, intended to be fixed usually on a pole element (for example the "+" pole of a battery), an electrical connection terminal (for example a motorcycle fan, starter or alternator terminal) or a ground.
  • a pole element for example the "+" pole of a battery
  • an electrical connection terminal for example a motorcycle fan, starter or alternator terminal
  • a ground for example a motorcycle fan, starter or alternator terminal
  • Each lug 16, 18 also has a second deformable end B to be crimped on the end of at least one conductor.
  • connection of the first 12 and second 14 conductors to the electrical lug 16 shown in the circled portion on FIG. figure 1 .
  • the first 12 and second 14 conductors are connected to the terminal 16 by means of a connecting member 20 according to the invention, shown in more detail on the Figures 2 to 7 .
  • the electrical conductors 12, 14 each comprise a conductive metal core 12A, 14A covered with a conventional sheath 12G, 14G (see FIG. Figures 5 to 7 ).
  • each core 12A, 14A is twisted son.
  • the core 12A of the first conductor essentially comprises aluminum.
  • the core 14A of the second conductor essentially comprises copper.
  • the electrical connection member 20 is made of a material essentially comprising copper, for example Cu-a1 corresponding to the ISO designation Cu-ETP (ETP being the English acronym for Electrolytic Tough-Pitch).
  • the material constituting the electrical connection member 20 has a ductility allowing a section reduction ratio of at least 15% in order to be able to achieve quality crimping in accordance with the method which will be described below.
  • the electrical connection member 20 comprises a first end 22 intended to be electrically connected to one end of the core 12A of the first conductor 12, by welding, according to a conventional method, for example by ultrasonic welding or by electric welding.
  • the electrical connection member 20 also comprises a second end 24 intended to be electrically connected, together with an end of the core 14A of the second conductor, to the electrical lug 16, by crimping.
  • the first 22 and second 24 ends of the connecting member 20 are spaced from each other so that the cores 12A, 14A of the first 12 and second 14 conductors do not touch once connected to the member 20 , as shown on the figure 7 .
  • the first end 22 of the connecting member 20 comprises a surface 26, preferably substantially flat, welding the end of the core 12A of the first conductor on this first end 22 of the member 20.
  • the second end 24 of the connecting member 20 comprises a first contact surface with the end of the core 14A of the second conductor.
  • This first contact surface is formed at least in part by a substantially rectilinear groove 28 formed in the second end 24 of the connecting member 20.
  • the second end 24 of the connecting member 20 comprises a second surface 30, opposite to the first surface formed by the trough 28, in contact with the flanges 32 of the crimping end B of the lug 16 (see FIG. Figures 7 and 8 ).
  • the second surface 30 is formed at least in part by two bosses 34, substantially parallel to the trough 28, favoring the folding of the flanges 32 crimping. Indeed, the wings 32 are intended to be folded against these bosses 34.
  • the first surface 28 of contact with the core 14A of the second conductor and the second surface 30 of contact with the crimping wings 32 of the terminal 16 comprise projections 36, 38 of localized crimp pressure increase.
  • projections 36, 38 which are optional, can be arranged on the two surfaces 28, 30, as in the example described or on one of these two surfaces only.
  • the ends of the cores 12A, 14A of the first 12 and second 14 conductors are intended to be connected to the connection member 20 substantially parallel to a reference direction X represented in phantom on the figure 7 . It will be observed that the welding surface 26 with the core 12A of the first conductor is shifted, transversely to the reference direction X, relative to the first surface 28 of contact with the core 14A of the second conductor.
  • one end of the aluminum core 12A of the first conductor 12 is connected to the first end 22 of the connection member 20 by welding, for example by ultrasonic welding or by electric welding.
  • this welding step can be performed advantageously before the connecting member 20 is connected to the lug 16 and that lug is connected to the remainder of the electrical circuit, in particular to a possible terminal of electrical member.
  • the vibrations generated for example when the welding is performed by ultrasound do not cause resonances at the terminal or an electrical terminal to which the terminal is connected, which preserves the integrity of these elements.
  • a sealing sleeve 40 for example a heat-shrinkable polymer sleeve, is placed around the end of the core. 12A and the first end 22 of the member 20, as shown in particular on the figure 6 .
  • a first end 40A of the sleeve is placed in sealed contact with the sheath 12G surrounding the core 12A of the first conductor and a second end 40B of this sleeve 40 is placed in sealing contact with a sealing bead 42 of the connecting member 20.
  • bead 40 closes the second end 40B of the sleeve.
  • the bead 42 preferably integral with the rest of the connecting member 20, defines the first end 22 of this connecting member 20.
  • This bead 42 has, for example, a substantially oval contour, as shown on the figure 2 .
  • the bead 42 is arranged on the member 20 so that it separates the first end 22 of the member 20 of the second end 24 of the member 20 by preventing the end of the aluminum core 12A from coming to touch. the copper core 14A of the second conductor after connection of this core 14A with the connecting member 20 according to the following step.
  • the sleeve 40 may be replaced by a ribbon, a mass of overmolded material, a coating layer such as a varnish or equivalent means placed around the end of the core 12A the first conductor and the first end 22 of the connecting member.
  • the end of the copper core 14A is connected.
  • the second conductor at the second end 24 of the connecting member 20 by crimping the deformable end B of the lug 16 around the end of the core 14A of the second conductor juxtaposed to the second end 24 of the organ connection 20.
  • the cores 12A and 14A of the conductors 12 and 14 are connected to the member 20 itself connected to the lug 16 as shown in FIGS. Figures 7 and 8 .
  • the cores 12A, 14A of the two conductors are connected to the connecting member 20 so as not to touch one another, which in particular avoids favoring corrosion of electrochemical or galvanic origin, all the more so since the The end of the aluminum core 12A is protected by the sealing sleeve 40.
  • the copper core 14A of the second conductor can be crimped onto the connection member 20 before the aluminum core 12A of the first conductor is welded to this connection member 20.

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

Description

La présente invention concerne le raccordement de deux conducteurs électriques sur un élément formant cosse électrique, en particulier dans un circuit électrique de véhicule automobile.The present invention relates to the connection of two electrical conductors to an electrical lug element, in particular in a motor vehicle electrical circuit.

Dans ce qui suit, on appelle cosse un élément raccordé électriquement à l'extrémité d'un ou plusieurs conducteurs électriques et destiné généralement à être fixé sur un élément formant pôle, borne de connexion électrique ou masse électrique. Une cosse comporte habituellement une première extrémité de fixation sur l'élément formant pôle, borne de connexion électrique ou masse, en forme générale d'anneau, et une seconde extrémité déformable destinée à être sertie sur l'extrémité d'au moins un conducteur.In what follows, the term "lug" is an element electrically connected to the end of one or more electrical conductors and generally intended to be fixed on a pole element, electrical connection terminal or electrical ground. A lug usually has a first attachment end on the pole member, electrical connection terminal or ground, generally ring-shaped, and a second deformable end to be crimped onto the end of at least one conductor.

La cosse peut être destinée à conduire des courants d'intensités et de tensions très variées.The pod may be intended to conduct currents of intensities and tensions very varied.

Un circuit électrique de véhicule automobile comprend, de façon classique, des câbles électriques comportant des âmes en fils de cuivre torsadés. En effet, les bonnes propriétés de conduction électrique du cuivre sont particulièrement adaptées à son utilisation dans les circuits électriques de véhicules automobiles.A motor vehicle electrical circuit conventionally comprises electrical cables comprising twisted copper wire cores. Indeed, the good electrical conduction properties of copper are particularly suitable for use in motor vehicle electrical circuits.

Dans certains cas, plusieurs câbles électriques, par exemple deux câbles électriques, sont raccordés à une même cosse par sertissage de la cosse sur des extrémités des âmes en cuivre des câbles. Le document US2009/181579 décrit une telle cosse ainsi qu'un insert de positionnement des câbles et le document US2008/265004 décrit un procédé de soudage de deux câbles sur un support.In some cases, several electrical cables, for example two electric cables, are connected to one and the same lug by crimping the lug on ends of the copper cores of the cables. The document US2009 / 181579 describes such a pod and a cable positioning insert and the document US2008 / 265004 describes a method of welding two cables on a support.

Or, on souhaite, par exemple dans un but de gain de poids, remplacer certains câbles électriques à âme en cuivre par des câbles à âme en aluminium, notamment en fils d'aluminium torsadés. Les câbles à âme en aluminium sont moins aptes au sertissage que les câbles à âme en cuivre, du fait notamment des propriétés mécaniques (relaxation mécanique) et chimiques (formation de couches superficielles d'alumine) des fils d'aluminium.However, it is desired, for example in order to gain weight, replace some copper-core electrical cables with aluminum cored cables, including twisted aluminum son. Aluminum cored cables are less crimpable than copper-core cables, due in particular to the mechanical properties (mechanical relaxation) and chemical properties (formation of surface layers of alumina) of the aluminum wires.

On observe de plus que le sertissage sur une même cosse de fils torsadés en cuivre et de fils torsadés en aluminium aboutit à une liaison fragilisée par une corrosion d'origine électrochimique ou galvanique.It is further observed that the crimping on the same terminal copper twisted son and twisted son aluminum results in a weakened connection by electrochemical or galvanic corrosion.

L'invention a notamment pour but de permettre le remplacement de câbles à âme en cuivre par des câbles à âme en aluminium dans un circuit électrique destiné en particulier à équiper un véhicule automobile, ceci, d'une part, sans avoir à modifier de façon conséquente les cosses habituellement utilisées et, d'autre part, en permettant le raccordement d'un premier câble à âme en cuivre et d'un second câble à âme en aluminium sur une cosse commune.The invention is in particular intended to allow the replacement of copper core cables by aluminum core cables in an electrical circuit intended in particular to equip a motor vehicle, this, on the one hand, without having to modify in any way consequently the lugs usually used and, secondly, allowing the connection of a first copper core cable and a second aluminum core cable on a common lug.

A cet effet, l'invention a pour objet un procédé de raccordement électrique d'au moins des premier et second conducteurs électriques sur un élément formant cosse électrique, chaque conducteur comprenant une âme métallique conductrice, la cosse comportant une extrémité déformable de sertissage de l'âme d'au moins un conducteur, conforme à la revendication 1.To this end, the subject of the invention is a method of electrically connecting at least first and second electrical conductors to an electrical lug element, each conductor comprising a conductive metal core, the lug having a deformable crimping end of the lug. core of at least one conductor according to claim 1.

Le procédé selon l'invention permet de raccorder sur une cosse commune classique un premier conducteur à âme en aluminium et un second conducteur à âme en cuivre.The method according to the invention makes it possible to connect to a conventional common terminal a first aluminum core conductor and a second copper core conductor.

En effet, le premier conducteur, muni d'une âme en aluminium, peut être relié à la cosse classique par l'intermédiaire de l'organe de raccordement en soudant le conducteur sur la première extrémité de cet organe de raccordement.Indeed, the first conductor, provided with an aluminum core, can be connected to the conventional lug via the connecting member by welding the conductor on the first end of this connecting member.

On notera que, dans le cas d'un âme en aluminium, celle-ci est relativement facile à souder par un procédé classique, par exemple par un procédé de soudage par ultrasons ou par un procédé de soudage électrique.Note that in the case of an aluminum core, it is relatively easy to weld by a conventional method, for example by an ultrasonic welding process or by an electric welding process.

Le second conducteur, muni d'une âme en cuivre, peut être relié à la cosse classique par sertissage de l'extrémité déformable de la cosse autour de l'extrémité de l'âme du second conducteur juxtaposée à la seconde extrémité de l'organe de raccordement.The second conductor, provided with a copper core, can be connected to the conventional terminal by crimping the deformable end of the terminal around the end of the core of the second conductor juxtaposed to the second end of the body. connection.

Du fait que sur l'organe de raccordement, l'âme en aluminium, fixée sur la première extrémité de cet organe de raccordement, est espacée de l'âme en cuivre, fixée sur la seconde extrémité de l'organe de raccordement, on évite la corrosion d'origine électrochimique ou galvanique qui apparaît lorsque les âmes en aluminium et en cuivre sont en contact mécanique l'une avec l'autre.Because on the connecting member, the aluminum core, fixed on the first end of this connecting member, is spaced from the copper core, fixed on the second end of the connecting member, it avoids corrosion of electrochemical or galvanic origin that occurs when the aluminum and copper cores are in mechanical contact with each other.

Suivant une autre caractéristique optionnelle du procédé selon l'invention, après soudage de l'âme du premier conducteur sur la première extrémité de l'organe de raccordement, on place des moyens d'étanchéité, par exemple un manchon, une masse de matériau surmoulée, un ruban ou une couche de revêtement tel qu'un vernis, autour de l'extrémité de l'âme du premier conducteur et de la première extrémité de l'organe de raccordement, ceci en plaçant

  • une première extrémité des moyens d'étanchéité en contact étanche avec une gaine entourant l'âme du premier conducteur et
  • une seconde extrémité des moyens d'étanchéité en contact étanche avec un bourrelet d'étanchéité de l'organe de raccordement.
According to another optional feature of the method according to the invention, after welding of the core of the first conductor to the first end of the connecting member, sealing means are placed, for example a sleeve, a mass of molded material. , a tape or a coating layer such as a varnish, around the end of the soul of the first driver and the first end of the connecting member, this by placing
  • a first end of the sealing means in sealing contact with a sheath surrounding the core of the first conductor and
  • a second end of the sealing means in sealing contact with a sealing bead of the connecting member.

Les moyens d'étanchéité assurent avantageusement une étanchéité aux agents agressifs habituels, tels que l'humidité, les projections de solvant et les poussières, dont on souhaite éviter le contact avec l'âme métallique.The sealing means advantageously provide a seal against the usual aggressive agents, such as moisture, solvent projections and dust, which it is desired to avoid contact with the metal core.

L'organe de raccordement électrique, destiné à la mise en oeuvre du procédé tel que défini ci-dessus comprend :

  • une première extrémité destinée à être reliée électriquement avec une extrémité de l'âme du premier conducteur par soudage, et
  • une seconde extrémité destinée à être reliée électriquement, conjointement avec une extrémité de l'âme du second conducteur, à la cosse électrique par sertissage,
les première et seconde extrémités de l'organe de raccordement étant espacées l'une de l'autre de façon que les âmes des premier et second conducteurs ne se touchent pas une fois reliées à l'organe de raccordement.The electrical connection member intended for implementing the method as defined above comprises:
  • a first end intended to be electrically connected to one end of the core of the first conductor by welding, and
  • a second end intended to be electrically connected, together with an end of the core of the second conductor, to the electrical terminal by crimping,
the first and second ends of the connecting member being spaced from each other so that the cores of the first and second conductors do not touch when connected to the connecting member.

L'organe de raccordement électrique selon l'invention, comportant, d'une part, une première extrémité adaptée au soudage d'un conducteur et, d'autre part, une seconde extrémité adaptée au sertissage d'un conducteur et d'une cosse classique, permet de raccorder à une même cosse un conducteur à âme en aluminium (soudée sur la première extrémité de l'organe de raccordement) et un conducteur à âme en cuivre (serti sur la seconde extrémité de l'organe de raccordement).The electrical connection member according to the invention, comprising, on the one hand, a first end adapted to the welding of a conductor and, on the other hand, a second end adapted to crimping a conductor and a terminal conventional, allows to connect to the same lug an aluminum core conductor (welded to the first end of the connecting member) and a core conductor copper (crimped on the second end of the connecting member).

Suivant d'autres caractéristiques optionnelles ou non de l'organe de raccordement selon l'invention :

  • cet organe est en matériau comprenant essentiellement du cuivre, par exemple en Cu-a1 correspondant à la désignation ISO Cu-ETP (ETP étant le sigle anglo-saxon pour Electrolytic Tough-Pitch), ce matériau ayant de préférence une ductilité permettant un taux de réduction de section d'au moins 15 % ;
  • la première extrémité de l'organe de raccordement comprend une surface, de préférence sensiblement plane, de soudage de l'extrémité de l'âme du premier conducteur sur cette première extrémité de l'organe de raccordement ;
  • l'âme du premier conducteur comprend essentiellement de l'aluminium et est de préférence en fils torsadés ;
  • la seconde extrémité de l'organe de raccordement comprend une première surface de contact avec l'extrémité de l'âme du second conducteur et une seconde surface, opposée à la précédente, de contact avec des ailes de sertissage de la cosse ;
  • la première surface de contact avec l'âme comprend une gouttière sensiblement rectiligne, ménagée dans la seconde extrémité de l'organe de raccordement, et la seconde surface de contact avec les ailes de sertissage comprend deux bossages, sensiblement parallèles à la gouttière, favorisant le repliage des ailes de sertissage ;
  • la première surface de contact avec l'âme du second conducteur et/ou la seconde surface de contact avec les ailes de sertissage de la cosse comprennent des saillies d'accroissement localisé de pression de sertissage ;
  • l'âme du second conducteur comprend essentiellement du cuivre et est, de préférence, en fils torsadés ;
  • les extrémités des âmes des premier et second conducteurs sont destinées à être reliées à l'organe de raccordement de façon sensiblement parallèle à une direction de référence, la surface de soudage avec l'âme du premier conducteur étant décalée, transversalement à la direction de référence, par rapport à la première surface de contact avec l'âme du second conducteur.
According to other optional features or not of the connection member according to the invention:
  • this member is made of a material essentially comprising copper, for example Cu-a1 corresponding to the ISO Cu-ETP designation (ETP being the Electrolytic Tough-Pitch acronym), this material preferably having a ductility allowing a degree of section reduction of at least 15%;
  • the first end of the connecting member comprises a surface, preferably substantially flat, welding the end of the core of the first conductor on this first end of the connecting member;
  • the soul of the first conductor essentially comprises aluminum and is of preferably twisted wires;
  • the second end of the connecting member comprises a first contact surface with the end of the core of the second conductor and a second surface, opposite the previous one, in contact with crimping wings of the terminal;
  • the first contact surface with the core comprises a substantially rectilinear groove, formed in the second end of the connecting member, and the second contact surface with the crimping wings comprises two bosses, substantially parallel to the gutter, favoring the folding the crimping wings;
  • the first contact surface with the core of the second conductor and / or the second contact surface with the crimping wings of the terminal comprise crimp pressure localized increments;
  • the core of the second conductor essentially comprises copper and is preferably of twisted wire;
  • the ends of the cores of the first and second conductors are intended to be connected to the connecting member substantially parallel to a reference direction, the welding surface with the core of the first conductor being shifted transversely to the reference direction relative to the first contact surface with the core of the second conductor.

On a également décrit un circuit électrique, notamment pour véhicule automobile, comprenant au moins des premier et second conducteurs et des moyens de liaison de ces conducteurs à un élément formant cosse électrique, caractérisé en ce que les moyens de liaison comprennent un organe de raccordement électrique tel que défini ci-dessus.An electric circuit has also been described, in particular for a motor vehicle, comprising at least first and second conductors and means for connecting these conductors to an electrical terminal element, characterized in that the connection means comprise an electrical connection member. as defined above.

L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux figures dans lesquelles :

  • la figure 1 est une vue d'un circuit électrique selon l'invention, notamment pour véhicule automobile ;
  • la figure 2 est une vue en perspective d'un organe de raccordement électrique selon l'invention ;
  • la figure 3 est une vue de côté, schématisée, de l'organe de raccordement électrique représenté sur la figure 2 ;
  • la figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 3 ;
  • les figures 5 à 7 sont des vues similaires à la figure 3 illustrant différentes étapes du procédé de raccordement électrique de deux conducteurs, selon l'invention ; et
  • la figure 8 est une vue en coupe suivant la ligne VIII-VIII de la figure 7.
The invention will be better understood on reading the following description given solely by way of example and with reference to the figures in which:
  • the figure 1 is a view of an electrical circuit according to the invention, in particular for a motor vehicle;
  • the figure 2 is a perspective view of an electrical connection member according to the invention;
  • the figure 3 is a schematic side view of the electrical connection member shown in FIG. figure 2 ;
  • the figure 4 is a sectional view along line IV-IV of the figure 3 ;
  • the Figures 5 to 7 are views similar to the figure 3 illustrating different steps of the method of electrical connection of two conductors, according to the invention; and
  • the figure 8 is a sectional view along the line VIII-VIII of the figure 7 .

On a représenté sur la figure 1 un circuit électrique 10 selon l'invention destiné, dans l'exemple décrit, à équiper un véhicule automobile.We have shown on the figure 1 an electrical circuit 10 according to the invention intended, in the example described, to equip a motor vehicle.

Le circuit 10 comprend trois conducteurs électriques 12, 14 munis d'extrémités raccordées, d'une part, à une première paire de cosses électriques classiques 16, selon un procédé de raccordement électrique selon l'invention et, d'autre part, à une seconde paire de cosses électriques classiques 18, selon un procédé connu en soi.The circuit 10 comprises three electrical conductors 12, 14 provided with ends connected, on the one hand, to a first pair of conventional electrical lugs 16, according to an electrical connection method according to the invention and, on the other hand, to a second pair of conventional electrical terminals 18, according to a method known per se.

Chaque cosse 16, 18 comprend une première extrémité A, en forme générale d'anneau, destinée à être fixée habituellement sur un élément formant pôle (par exemple le pôle « + » d'une batterie), une borne de connexion électrique (par exemple une borne de groupe moto-ventilateur, de démarreur ou d'alternateur) ou une masse. Chaque cosse 16, 18 comporte également une seconde extrémité déformable B destinée à être sertie sur l'extrémité d'au moins un conducteur.Each lug 16, 18 comprises a first end A, generally ring-shaped, intended to be fixed usually on a pole element (for example the "+" pole of a battery), an electrical connection terminal (for example a motorcycle fan, starter or alternator terminal) or a ground. Each lug 16, 18 also has a second deformable end B to be crimped on the end of at least one conductor.

Dans ce qui suit, on décrira plus particulièrement le raccordement des premier 12 et second 14 conducteurs à la cosse électrique 16 représentée dans la partie cerclée sur la figure 1.In what follows, the connection of the first 12 and second 14 conductors to the electrical lug 16 shown in the circled portion on FIG. figure 1 .

Les premier 12 et second 14 conducteurs sont raccordés à la cosse 16 au moyen d'un organe de raccordement 20 selon l'invention, représenté plus en détails sur les figures 2 à 7.The first 12 and second 14 conductors are connected to the terminal 16 by means of a connecting member 20 according to the invention, shown in more detail on the Figures 2 to 7 .

Les conducteurs électriques 12, 14, comprennent chacun une âme métallique conductrice 12A, 14A recouverte d'une gaine classique 12G, 14G (voir figures 5 à 7). Dans l'exemple décrit, chaque âme 12A, 14A est en fils torsadés. L'âme 12A du premier conducteur comprend essentiellement de l'aluminium. L'âme 14A du second conducteur comprend essentiellement du cuivre.The electrical conductors 12, 14 each comprise a conductive metal core 12A, 14A covered with a conventional sheath 12G, 14G (see FIG. Figures 5 to 7 ). In the example described, each core 12A, 14A is twisted son. The core 12A of the first conductor essentially comprises aluminum. The core 14A of the second conductor essentially comprises copper.

L'organe de raccordement électrique 20 est en matériau comprenant essentiellement du cuivre, par exemple en Cu-a1 correspondant à la désignation ISO Cu-ETP (ETP étant le sigle anglo-saxon pour Electrolytic Tough-Pitch). De préférence, le matériau constituant l'organe de raccordement électrique 20 a une ductilité permettant un taux de réduction de section d'au moins 15 % afin de pouvoir réaliser un sertissage de qualité conformément au procédé qui sera décrit plus bas.The electrical connection member 20 is made of a material essentially comprising copper, for example Cu-a1 corresponding to the ISO designation Cu-ETP (ETP being the English acronym for Electrolytic Tough-Pitch). Preferably, the material constituting the electrical connection member 20 has a ductility allowing a section reduction ratio of at least 15% in order to be able to achieve quality crimping in accordance with the method which will be described below.

L'organe de raccordement électrique 20 comprend une première extrémité 22 destinée à être reliée électriquement avec une extrémité de l'âme 12A du premier conducteur 12, par soudage, suivant un procédé classique, par exemple par soudage par ultrasons ou par soudage électrique.The electrical connection member 20 comprises a first end 22 intended to be electrically connected to one end of the core 12A of the first conductor 12, by welding, according to a conventional method, for example by ultrasonic welding or by electric welding.

L'organe de raccordement électrique 20 comprend également une seconde extrémité 24 destinée à être reliée électriquement, conjointement avec une extrémité de l'âme 14A du second conducteur, à la cosse électrique 16, par sertissage.The electrical connection member 20 also comprises a second end 24 intended to be electrically connected, together with an end of the core 14A of the second conductor, to the electrical lug 16, by crimping.

Les première 22 et seconde 24 extrémités de l'organe de raccordement 20 sont espacées l'une de l'autre de façon que les âmes 12A, 14A des premier 12 et second 14 conducteurs ne se touchent pas une fois reliées à l'organe 20, comme cela est représenté sur la figure 7.The first 22 and second 24 ends of the connecting member 20 are spaced from each other so that the cores 12A, 14A of the first 12 and second 14 conductors do not touch once connected to the member 20 , as shown on the figure 7 .

La première extrémité 22 de l'organe de raccordement 20 comprend une surface 26, de préférence sensiblement plane, de soudage de l'extrémité de l'âme 12A du premier conducteur sur cette première extrémité 22 de l'organe 20.The first end 22 of the connecting member 20 comprises a surface 26, preferably substantially flat, welding the end of the core 12A of the first conductor on this first end 22 of the member 20.

La seconde extrémité 24 de l'organe de raccordement 20 comprend une première surface de contact avec l'extrémité de l'âme 14A du second conducteur. Cette première surface de contact est formée au moins en partie par une gouttière 28, sensiblement rectiligne, ménagée dans la seconde extrémité 24 de l'organe de raccordement 20.The second end 24 of the connecting member 20 comprises a first contact surface with the end of the core 14A of the second conductor. This first contact surface is formed at least in part by a substantially rectilinear groove 28 formed in the second end 24 of the connecting member 20.

La seconde extrémité 24 de l'organe de raccordement 20 comprend une seconde surface 30, opposée à la première surface formée par la gouttière 28, de contact avec des ailes 32 de l'extrémité B de sertissage de la cosse 16 (voir figures 7 et 8).The second end 24 of the connecting member 20 comprises a second surface 30, opposite to the first surface formed by the trough 28, in contact with the flanges 32 of the crimping end B of the lug 16 (see FIG. Figures 7 and 8 ).

La seconde surface 30 est formée au moins en partie par deux bossages 34, sensiblement parallèles à la gouttière 28, favorisant le repliage des ailes 32 de sertissage. En effet, les ailes 32 sont destinées à être pliées contre ces bossages 34.The second surface 30 is formed at least in part by two bosses 34, substantially parallel to the trough 28, favoring the folding of the flanges 32 crimping. Indeed, the wings 32 are intended to be folded against these bosses 34.

De préférence, la première surface 28 de contact avec l'âme 14A du second conducteur et la seconde surface 30 de contact avec les ailes 32 de sertissage de la cosse 16 comprennent des saillies 36, 38 d'accroissement localisé de pression de sertissage.Preferably, the first surface 28 of contact with the core 14A of the second conductor and the second surface 30 of contact with the crimping wings 32 of the terminal 16 comprise projections 36, 38 of localized crimp pressure increase.

Ces saillies 36, 38, qui sont optionnelles, peuvent être agencées sur les deux surfaces 28, 30, comme dans l'exemple décrit ou bien sur l'une de ces deux surfaces uniquement.These projections 36, 38, which are optional, can be arranged on the two surfaces 28, 30, as in the example described or on one of these two surfaces only.

En se référant plus particulièrement à la figure 7, on voit que les extrémités des âmes 12A, 14A des premier 12 et second 14 conducteurs sont destinées à être reliées à l'organe de raccordement 20 de façon sensiblement parallèle à une direction de référence X représentée en traits mixtes sur la figure 7. On observera que la surface de soudage 26 avec l'âme 12A du premier conducteur est décalée, transversalement à la direction de référence X, par rapport à la première surface 28 de contact avec l'âme 14A du second conducteur.With particular reference to the figure 7 it can be seen that the ends of the cores 12A, 14A of the first 12 and second 14 conductors are intended to be connected to the connection member 20 substantially parallel to a reference direction X represented in phantom on the figure 7 . It will be observed that the welding surface 26 with the core 12A of the first conductor is shifted, transversely to the reference direction X, relative to the first surface 28 of contact with the core 14A of the second conductor.

On décrira ci-dessous les étapes liées à l'invention concernant un procédé de raccordement électrique des premier 12 et second 14 conducteurs sur la cosse électrique 16.The steps related to the invention will be described below concerning a method of electrical connection of the first 12 and second 14 conductors on the electrical lug 16.

Selon ce procédé, on relie une extrémité de l'âme 12A en aluminium du premier conducteur 12 à la première extrémité 22 de l'organe de raccordement 20 par soudage, par exemple par soudage par ultrasons ou par soudage électrique.According to this method, one end of the aluminum core 12A of the first conductor 12 is connected to the first end 22 of the connection member 20 by welding, for example by ultrasonic welding or by electric welding.

On notera que, comme cela est représenté sur la figure 5, cette étape de soudage peut être réalisée avantageusement avant que l'organe de raccordement 20 soit relié à la cosse 16 et que cette cosse soit reliée au reste du circuit électrique, notamment à une éventuelle borne d'organe électrique. Ainsi, les vibrations engendrées par exemple lorsque le soudage est réalisé par ultrasons ne provoquent pas de résonances au niveau de la cosse ou d'une borne électrique à laquelle est reliée la cosse, ce qui préserve l'intégrité de ces éléments.It should be noted that, as shown on the figure 5 this welding step can be performed advantageously before the connecting member 20 is connected to the lug 16 and that lug is connected to the remainder of the electrical circuit, in particular to a possible terminal of electrical member. Thus, the vibrations generated for example when the welding is performed by ultrasound do not cause resonances at the terminal or an electrical terminal to which the terminal is connected, which preserves the integrity of these elements.

Après soudage de l'âme 12A du premier conducteur sur la première extrémité 22 de l'organe de raccordement, on place un manchon d'étanchéité 40, par exemple un manchon en polymère thermo-rétractable, autour de l'extrémité de l'âme 12A et de la première extrémité 22 de l'organe 20, comme cela est représenté notamment sur la figure 6.After welding of the core 12A of the first conductor on the first end 22 of the connecting member, a sealing sleeve 40, for example a heat-shrinkable polymer sleeve, is placed around the end of the core. 12A and the first end 22 of the member 20, as shown in particular on the figure 6 .

Plus particulièrement, on place une première extrémité 40A du manchon en contact étanche avec la gaine 12G entourant l'âme 12A du premier conducteur et on place une seconde extrémité 40B de ce manchon 40 en contact étanche avec un bourrelet d'étanchéité 42 de l'organe de raccordement 20.More particularly, a first end 40A of the sleeve is placed in sealed contact with the sheath 12G surrounding the core 12A of the first conductor and a second end 40B of this sleeve 40 is placed in sealing contact with a sealing bead 42 of the connecting member 20.

On notera que le le bourrelet 40 obture la seconde extrémité 40B du manchon.It will be noted that the bead 40 closes the second end 40B of the sleeve.

Le bourrelet 42, de préférence venu de matière avec le reste de l'organe de raccordement 20, délimite la première extrémité 22 de cet organe de raccordement 20. Ce bourrelet 42 a, par exemple, un contour sensiblement ovale, comme cela est représenté sur la figure 2. Le bourrelet 42 est agencé sur l'organe 20 de façon qu'il sépare la première extrémité 22 de l'organe 20 de la seconde extrémité 24 de cet organe 20 en évitant que l'extrémité de l'âme 12A en aluminium ne vienne toucher l'âme 14A en cuivre du second conducteur après raccordement de cette âme 14A avec l'organe de raccordement 20 conformément à l'étape qui suit.The bead 42, preferably integral with the rest of the connecting member 20, defines the first end 22 of this connecting member 20. This bead 42 has, for example, a substantially oval contour, as shown on the figure 2 . The bead 42 is arranged on the member 20 so that it separates the first end 22 of the member 20 of the second end 24 of the member 20 by preventing the end of the aluminum core 12A from coming to touch. the copper core 14A of the second conductor after connection of this core 14A with the connecting member 20 according to the following step.

En variante, le manchon 40, formant moyens d'étanchéité, peut être remplacé par un ruban, une masse de matériau surmoulée, une couche de revêtement tel qu'un vernis ou tout moyen équivalent placé autour de l'extrémité de l'âme 12A du premier conducteur et de la première extrémité 22 de l'organe de raccordement.Alternatively, the sleeve 40, forming sealing means, may be replaced by a ribbon, a mass of overmolded material, a coating layer such as a varnish or equivalent means placed around the end of the core 12A the first conductor and the first end 22 of the connecting member.

Après mise en place du manchon 40, on relie l'extrémité de l'âme en cuivre 14A du second conducteur à la seconde extrémité 24 de l'organe de raccordement 20 par sertissage de l'extrémité déformable B de la cosse 16 autour de l'extrémité de l'âme 14A du second conducteur juxtaposée à la seconde extrémité 24 de l'organe de raccordement 20.After placing the sleeve 40, the end of the copper core 14A is connected. the second conductor at the second end 24 of the connecting member 20 by crimping the deformable end B of the lug 16 around the end of the core 14A of the second conductor juxtaposed to the second end 24 of the organ connection 20.

Les âmes 12A et 14A des conducteurs 12 et 14 sont raccordées à l'organe 20 lui-même raccordé à la cosse 16 comme cela est représenté sur les figures 7 et 8.The cores 12A and 14A of the conductors 12 and 14 are connected to the member 20 itself connected to the lug 16 as shown in FIGS. Figures 7 and 8 .

Dans cette configuration, les âmes 12A, 14A des deux conducteurs sont reliées à l'organe de raccordement 20 de façon à ne pas se toucher ce qui évite notamment de favoriser la corrosion d'origine électrochimique ou galvanique, ceci d'autant mieux que l'extrémité de l'âme 12A en aluminium est protégée par le manchon 40 d'étanchéité.In this configuration, the cores 12A, 14A of the two conductors are connected to the connecting member 20 so as not to touch one another, which in particular avoids favoring corrosion of electrochemical or galvanic origin, all the more so since the The end of the aluminum core 12A is protected by the sealing sleeve 40.

On notera que l'invention ne se limite pas au mode de réalisation décrit précédemment.Note that the invention is not limited to the embodiment described above.

En particulier, si besoin est, l'âme 14A en cuivre du second conducteur peut être sertie sur l'organe de raccordement 20 avant que l'âme 12A en aluminium du premier conducteur ne soit soudée sur cet organe de raccordement 20.In particular, if necessary, the copper core 14A of the second conductor can be crimped onto the connection member 20 before the aluminum core 12A of the first conductor is welded to this connection member 20.

Par ailleurs, il est possible également de sertir sur la cosse plus d'un conducteur, par exemple deux conducteurs à âme en cuivre, conjointement avec la seconde extrémité 24 de l'organe de raccordement 30.Furthermore, it is also possible to crimp on the lug more than one conductor, for example two conductors with copper core, together with the second end 24 of the connecting member 30.

Claims (7)

  1. Method for electrically connecting at least first (12) and second (14) electrical conductors to an element forming an electrical terminal (16), each conductor (12, 14) comprising a conductive metal core (12A, 14A), the terminal (16) having a deformable end (B) for crimping on the core (14A) of at least one conductor (14), the method comprising the following steps:
    • connecting one end of the core (12A) of the first conductor to a first end (22) of an electrical connection member (20) by welding/soldering; and
    • connecting one end of the core (14A) of the second conductor to a second end (24) of the electrical connection member (20) by crimping the deformable end (B) of the terminal (16) around the end of the core (14A) of the second conductor juxtaposed with the second end (24) of the connection member (20);
    and wherein:
    • the first end (22) of the connection member includes a surface (26), preferably substantially plane, for welding/soldering the end of the core (12A) of the first conductor to said first end (22) of the connection member;
    • the second end (24) of the connection member includes a first contact surface (28) for contacting the end of the core (14A) of the second conductor, and a second contact surface (30), opposite to the preceding contact surface, for contacting with crimping flanges (32) of the terminal (16); and
    • the ends of the cores (12A, 14A) of the first and second conductors are connected to the connection member (20) in a manner that is substantially parallel to a reference direction (X), the surface (26) for welding/soldering to the core (12A) of the first conductor being offset, transversely to the reference direction (X), relative to the first contact surface (28) for contacting the core (14A) of the second conductor, the first (22) and second (24) ends of the connection member (20) being spaced apart from each other so that the cores (12A, 14A) of the first and second conductors do not touch once connected to the connection member (20) .
  2. Method according to claim 1, wherein, after welding/soldering the core (12A) of the first conductor to the first end (22) of the connection member (20), sealing means (40), e.g. a sleeve, a tape, a mass of overmolded material, or a layer of a covering such as a varnish, are placed around the end of the core (12A) of the first conductor and the first end (22) of the connection member, with this being done by placing:
    • a first end (40A) of the sealing means in leaktight contact with a sheath (12G) surrounding the core (12A) of the first conductor; and
    • a second end (40B) of the sealing means in leaktight contact with a sealing bulge (42) of the connection member (20).
  3. Method according to any of the preceding claims, wherein the electrical connection member (20) is made of material essentially comprising copper, e.g. Cu-a1 corresponding to ISO specification Cu-ETP (where ETP stands for electrolytic tough pitch), the material preferably having ductility allowing its section to be reduced by at least 15%.
  4. Method according to any of the preceding claims, wherein the core (12A) of the first conductor essentially comprises aluminum and is preferably made of twisted wires.
  5. Method according to any of the preceding claims, wherein the first contact surface (28) for contacting with the core includes a substantially rectilinear trough (28) formed in the second end (24) of the connection member, and the second surface (30) for contacting the crimping flanges comprises two protrusions (34) substantially parallel with the trough (28) to help folding of the crimping flanges (32).
  6. Method according to any of the preceding claims, wherein the first contact surface (28) for contacting the core (14A) of the second conductor, and/or the second contact surface (30) for contacting the crimping flanges (32) of the terminal (16) include projections (36, 38) for locally increasing crimping pressure.
  7. Method according to any of the preceding claims, wherein the core (14A) of the second conductor essentially comprises copper and is preferably made of twisted wires.
EP20120187597 2011-10-07 2012-10-08 Connection of two electrical conductors on an element forming an electrical terminal Active EP2579391B1 (en)

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FR1159082A FR2981214B1 (en) 2011-10-07 2011-10-07 CONNECTING TWO ELECTRICAL CONDUCTORS TO AN ELECTRICAL BODY ELEMENT

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EP2579391A1 EP2579391A1 (en) 2013-04-10
EP2579391B1 true EP2579391B1 (en) 2014-12-03

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CN112615168B (en) * 2020-12-07 2022-08-12 西安航天动力测控技术研究所 Compact connector and method for enameled wire and wire

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JP2002025647A (en) * 2000-07-03 2002-01-25 Sumitomo Wiring Syst Ltd Waterproof structure for electric wire terminal part
SE526844C2 (en) * 2003-05-12 2005-11-08 Safetrack Infrasystems Sisab A New connecting piece of electrically conductive material preferably a cable shoe and method for its manufacture
DE102004050001A1 (en) * 2004-10-14 2006-04-20 Contitech Techno-Chemie Gmbh crimp
CN101151769A (en) * 2005-04-01 2008-03-26 株式会社自动网络技术研究所 Conductor and wire harness
DE102005048368B3 (en) * 2005-10-10 2007-05-03 Schunk Ultraschalltechnik Gmbh Method for producing a welded connection between electrical conductors
FR2906651A1 (en) * 2006-10-03 2008-04-04 Valeo Electronique Sys Liaison Rigid bar and multi-stranded cable's electrical connection forming assembly, has strip made of metallic material similar to material of bar or with potential intermediate between potential of bar's material and potential of cable's material
US7601037B2 (en) * 2008-01-11 2009-10-13 Hamilton Sundstrand Corporation Terminal with multiple wire connection
JP4631951B2 (en) * 2008-09-19 2011-02-16 パナソニック株式会社 Electrical connection means for washing machine between wound coil and copper wire

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FR2981215A1 (en) 2013-04-12
FR2981215B1 (en) 2015-02-06
EP2579391A1 (en) 2013-04-10
FR2981214A1 (en) 2013-04-12
FR2981214B1 (en) 2014-09-12

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