EP4037107A1 - Elektrische verbindungsvorrichtung mit buchse - Google Patents

Elektrische verbindungsvorrichtung mit buchse Download PDF

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Publication number
EP4037107A1
EP4037107A1 EP22153724.4A EP22153724A EP4037107A1 EP 4037107 A1 EP4037107 A1 EP 4037107A1 EP 22153724 A EP22153724 A EP 22153724A EP 4037107 A1 EP4037107 A1 EP 4037107A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
connection device
electrical connection
connection
nut
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.)
Pending
Application number
EP22153724.4A
Other languages
English (en)
French (fr)
Inventor
Laurent Ferrieres
Bingcheng DOU
Luc Legrand
Olivier AUDRAIN
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.)
Vm Industries
Leoni Wiring Systems France SAS
Original Assignee
Vm Industries
Leoni Wiring Systems France SAS
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 Vm Industries, Leoni Wiring Systems France SAS filed Critical Vm Industries
Publication of EP4037107A1 publication Critical patent/EP4037107A1/de
Pending legal-status Critical Current

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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
    • 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
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/283—Bolt, screw or threaded ferrule parallel to the battery post
    • 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
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/286—End pieces consisting of a ferrule or sleeve for connections to batteries having means for improving contact between battery post and clamping member, e.g. uneven interior surface
    • 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
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H01R11/281—End pieces consisting of a ferrule or sleeve for connections to batteries
    • H01R11/284—End pieces consisting of a ferrule or sleeve for connections to batteries comprising means for preventing corrosion, e.g. covers, enclosures filled with gel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the invention relates to an electrical connection device, in particular an electrical connection device used in the automotive field.
  • a motor vehicle comprises several electrical components which are powered by a battery connected to them by electrical conductors, usually cables or cable harnesses.
  • the conductor is an electrical cable comprising a core of twisted copper wires or comprising essentially copper.
  • An insulating sheath surrounds the core over practically its entire length.
  • An element is said to consist essentially of a material when it comprises more than 50% by mass of this material.
  • an electrical connection device made of electrically conductive material.
  • Such an electrical connection device comprises, on the one hand, a first branch forming a connection terminal to which is welded a socket in which the electrode is inserted and, on the other hand, a second branch, intended to be connected to the soul of a driver.
  • the temperature of the electrode Due to the temperature prevailing inside the catalyst, the temperature of the electrode can reach 400°C.
  • a significant heat flux is transferred, via the electrical connection device, to the electrical conductor.
  • electrical conductors designed to withstand such temperatures.
  • the sheaths of these conductors are designed to withstand such temperatures.
  • such conductors are particularly expensive.
  • soldering the connection lug to the socket is also costly.
  • the object of the invention is in particular to provide an electrical connection device making it possible to limit the aforementioned costs.
  • the internal channel is delimited by a solid internal wall.
  • the section of the internal channel evolves between its first and its second opening, it is possible to restrict the contact between the electrode and the sleeve, for example by providing one or more localized spacings, which limits the exchange of heat between the electrode and the sleeve, and therefore between the electrode and the electrical conductor, while maintaining an electrical contact allowing the transmission of current to the electrical conductor. It is also possible to change the thickness of the walls of the sleeve so as to also influence the heat exchanges between the electrode and the sleeve.
  • connection device rather than having to provide a sufficiently heat-resistant and therefore costly electrical conductor, it is possible to use a less expensive electrical conductor since less heat will be transferred to it thanks to the particular configuration offered by the electrical connection device according to the invention.
  • the insertion of the sleeve into the connection hole of the connection lug offers connection possibilities between these two elements which are less expensive and/or less complex than welding, such as crimping, screwing, press fit, etc.
  • the sleeve is made of a material comprising essentially stainless steel.
  • the electrical conductivity of stainless steel is sufficient to ensure a good electrical connection between the electrode and the core of the electrical conductor (cable), and that it does not It is therefore not necessary to use a material as electrically conductive as a material essentially comprising copper such as the CuSn 8 alloy used in the prior art.
  • this makes it possible to take advantage of the lower thermal conductivity of stainless steel and therefore to limit the transfer of heat from the electrode to the electrical conductor. This makes it possible to use an electrical conductor that is less resistant to high temperatures, and therefore less expensive.
  • connection member is made of a material essentially comprising steel stainless steel or a material essentially comprising copper, the thermal conductivity of which is less than 100 Wm -1 K -1 .
  • connection member is connected to the core of the conductor by welding or crimping.
  • connection member when the connection member is connected to the core of the conductor by welding, it will be made of a material essentially comprising stainless steel.
  • connection member when the connection member connected to the core of the conductor by crimping, it will be made of a material essentially comprising copper.
  • the half-angle at the apex of the first potion is preferably between 1.55° and 1.95°, preferably equal to 1.75°.
  • the frustoconical shape makes it possible to obtain contact between this portion and the electrode of the catalyst, the free end of which is generally frustoconical.
  • the first portion of the inner wall in the form of a truncated cone is solid.
  • the sleeve is inserted into the connection orifice so that the connection terminal is located substantially equidistant from a free end of the sleeve on the one hand, and from the first portion of the inner wall on the other hand.
  • Arranging the connection lug equidistant from a free end of the socket on the one hand, and from the first portion on the other hand amounts to arranging the electrical conductor at a maximum distance from each of the heat sources that are the end free from the socket and the first portion of the internal wall.
  • the first portion of the inner wall given its shape, is where a contact, and therefore a transfer of heat by conduction, will take place.
  • the free end of the sleeve is a place of heat transfer by conduction via a potential locking element of the sleeve on the electrode will be placed.
  • the internal wall of the sleeve comprises a second portion in the form of a truncated cone, of opposite convergence to that of the first portion, whose half-angle at the apex is greater than 5° , preferably greater than 11°.
  • the sleeve comprises an outer wall, said outer wall comprising a portion in the shape of a truncated cone, the half-angle at the apex of which is preferably between 5° and 8°, for example equal to 6.5°.
  • the fact that the outer wall of the socket comprises at least one frustoconical portion facilitates its insertion into the connection orifice of the connection lug.
  • the sleeve is force-fitted into the connection orifice. This is an inexpensive way to connect the socket to the terminal lug.
  • connection member further comprises an integrated locking nut and opening into the connection orifice, so as to be free to rotate around the longitudinal axis of the sleeve.
  • the locking nut keeps the sleeve in place along the electrode.
  • the integrated nut is made of a material comprising essentially stainless steel. This choice of material avoids galvanic corrosion.
  • the nut is crimped into the connection terminal.
  • the nut comprises a flange
  • the connection lug comprises at least one substantially planar body comprising a folded wing provided with a retaining window in which the flange is inserted on at least a portion of its circumference, so as to prevent movement of the nut in a direction parallel to the longitudinal axis of the sleeve.
  • the nut comprises a collar and the connection lug comprises at least one holding claw, preferably at least three holding claws, folded over the collar over at least a portion of its circumference, so as to prevent movement of the nut in a direction parallel to the longitudinal axis of the sleeve.
  • connection device in order to protect the connection device and the electrode from attacks due to the external environment, and also to electrically insulate the assembly composed of the connection device and the electrode , which may be required by some manufacturers.
  • the electrical connection device further comprises a protective cover, for example made of metallic material comprising an electrically insulating coating or glass fibers, covering the connection member and one end of the socket, the cover being provided with a sleeve in which the conductor is intended to be inserted.
  • connection device according to a first embodiment of the invention designated by the general reference 10, mounted on an electrode 12 of a motor vehicle catalyst (not shown).
  • Electrode 12 as can be seen in particular in figures 1, 2 , 6 and 7 , is a part of revolution, extending along a longitudinal axis. Conventionally, the electrode 12 protrudes, normal to the outer wall of the catalyst.
  • the electrode 12 comprises at its free end a first portion 14, cylindrical of revolution, and a second portion 16 in the shape of a truncated cone whose half-angle at the apex is between 1.55° and 1.95°, for example 1.75°. This angle and this shape vary according to the applications and the specifications of the car manufacturers.
  • the two portions 14, 16 of the electrode are connected so that the second portion 16 flares out from the first 14.
  • the first portion 14 of the electrode is threaded at its free end so as to allow the screwing of a nut as will be seen later.
  • connection device 10 comprises a connection member 20 comprising a first branch forming a connection lug 22 provided with a through connection orifice 24, and a second branch 26, called connection, intended to be connected to the core of a conductor 28.
  • connection orifice 24 is an orifice with a circular outline.
  • the connecting branch 26 is bent with respect to the connection terminal 22, here by an angle of approximately 90°. As will be seen later, this makes it possible to space the conductor 28 from the heat source that the electrode 12 forms. as in the embodiment of the picture 3 which will be described later, that the connecting branch 26 and the connection lug 22 extend substantially along the same plane.
  • the conductor 28, represented only at figure 1 is here an electric cable comprising a core of twisted copper wires or comprising essentially copper.
  • An insulating sheath, the only element of conductor 28 visible to figure 1 surrounds the core over practically its entire length.
  • connection member 20 comprises a substantially planar body 30, provided, at the free end of the connecting branch 26, with one or more pairs of crimping wings 32.
  • the crimping wings 32 are arranged either side of the connecting branch 26, and intended to be crimped onto the core of the conductor 28 once the latter has been stripped. In the figures, these crimping wings 32 are two in number ( figure 1 ) or four ( figures 2 to 4 ).
  • connection member 20 comprises, at its branch forming a connection lug 22, a connection orifice 24.
  • the connection orifice 24 is an orifice passing through the body 30 right through the connection lug 22
  • connection lug 22 is an extension 30 of the body and is substantially planar. Its shape can vary, and it can in particular be flared with respect to the body 30.
  • connection member 20 is either welded or crimped to the core of the conductor 28.
  • the crimping wings 32 are thus either welded to the core of the conductor 28 , or crimped onto the conductor core 28.
  • connection member 20 when the connection member 20 is connected to the conductor 28 by welding, the connection member 20 will preferably be made of a material consisting mainly of stainless steel.
  • the crimping wings 32 are made of a material essentially comprising stainless steel.
  • connection member 20 when the connection member 20 is connected to the conductor 28 by crimping, the connection member 20 will preferably be made of a material essentially comprising copper.
  • the crimping wings 32 are made of a material essentially comprising copper.
  • the connection member 20 further comprises a sleeve 36 inserted into the connection orifice 24.
  • Sleeve 36 defines an internal channel 38 extending along a longitudinal axis connecting a first opening 38A to a second opening 38B.
  • the sleeve 36 here preferably has a shape of revolution whose longitudinal axis coincides with the longitudinal axis of the internal channel 38. Furthermore, the longitudinal axis of the internal channel 38 passes through the center of the contour of connection port 24.
  • the sleeve 36 is force-fitted into the connection orifice 24.
  • Other ways of connecting the sleeve 36 to the connection orifice 24 may nevertheless be provided, such as screwing, welding, crimping, etc.
  • the sleeve 36 is preferably made of a material essentially comprising stainless steel.
  • An element is said to consist essentially of a material when it comprises more than 50% by mass of this material.
  • the sleeve 36 is made in one piece.
  • connection member 20 is made of a material essentially comprising stainless steel or a material essentially comprising copper whose thermal conductivity is less than 100 Wm -1 K -1 .
  • the section of the internal channel 38 normal to the longitudinal axis evolves along the longitudinal axis between its first opening 38A and its second opening 38B.
  • the sleeve 36 is inserted on the electrode through the second opening 38A (bottom of the figures) and emerges through the first opening 38A (top of the figures).
  • the sleeve comprises an internal wall 36I defining the internal channel 38 which comprises a first portion 39A in the form of a truncated cone.
  • this first wall portion 39A is solid.
  • the vertex half-angle ⁇ is preferably between 1.55° and 1.95°, preferably 1.75°.
  • the first portion 39A of the internal wall 36I is therefore of a shape similar to that of the second portion of the electrode 16.
  • the aim here is to obtain a contact between the first portion 39A of the internal wall 36I and the second portion of the electrode 36, so as to ensure the passage of the current between the electrode 12 and the socket 36, and therefore between the electrode 12 and the conductor 28 via the connection lug 22, the body 30, and finally the crimping wings 32.
  • the first portion 39A of the internal wall 36I extends up to the second opening 38B.
  • the internal wall 36I comprises a second portion 39B of cylindrical shape of revolution.
  • the second portion 39B extends the first portion 39A and extends as far as the first opening 38A.
  • This break in section of the internal channel 38 makes it possible to create a localized spacing 41 between the sleeve 36 and the electrode 12. This absence of contact between the sleeve 26 and the electrode 12 makes it possible to limit the thermal conduction between these two elements, and therefore between the electrode 12 and the electrical conductor 28.
  • the respective lengths of the first portion 39A in the shape of a truncated cone and second cylindrical portion 39B of revolution is chosen so that the break in section of the internal wall 36I (and of the internal channel), or transition between the two portions, takes place at the level of the break in section of the electrode 1, that is to say at the junction between the first portion 14 and the second portion 16 of the electrode.
  • the outer wall 36E of the sleeve 36 is on the other hand cylindrical of revolution.
  • the internal channel 38 sees its section evolve along the longitudinal axis of the sleeve 36.
  • the maximum diameter of the sleeve 26 is 12mm, which corresponds to the maximum diameter authorized by the specifications imposed by certain manufacturers. automobiles.
  • connection lug 22 further comprises an integrated nut 40 in the connection member 20.
  • the nut 40 makes it possible to lock in position along its longitudinal axis the sleeve 36 on the electrode, and is screwed onto the thread provided for this purpose on the first portion of the electrode 14.
  • the nut 40 comes in particular rests on the free end of the sleeve 36, that is to say at the level of the first opening 38A of the channel, or else the end opposite that through which the sleeve 36 is inserted on the electrode 12.
  • the nut has a diameter of about 12mm.
  • the nut is integrated 40 in the connection lug and opens into the connection orifice 24, so as to be free to rotate around the longitudinal axis of the sleeve 36.
  • the integrated nut 40 is made of a material comprising essentially stainless steel.
  • the nut 40 comprises a flange 42 and a head 44.
  • the connection lug 22 comprises at least one folded wing 46, here one on either side of the connection lug 22, provided with a holding window 48 in which the collar 42 is inserted over at least a portion of its circumference, so as to prevent the movement of the nut 40 in a direction parallel to the longitudinal axis of the sleeve 36.
  • the retaining windows 48 here have an outline rectangular, but this shape can naturally vary.
  • the nut 40 comprises a flange 42 and a head 44.
  • the connection terminal 22 comprises at least one holding claw 50, folded over the flange 42 over at least a portion of its circumference, so as to prevent the movement of the nut 40 in a direction parallel to the longitudinal axis of the sleeve 36.
  • the holding lug comprises three holding claws 50 (only two are visible in the figure) distributed symmetrically around the circumference of the flange, but this number and their arrangement can naturally vary.
  • the nut 40 is crimped into the connection terminal 22.
  • the nut 40 may comprise a flange 42 which is crimped into the connection orifice 24.
  • the sleeve 36 comprises an outer wall 36E which comprises a portion 52 in the form of a truncated cone.
  • the entire outer wall 36E of the sleeve is tapered.
  • the vertex half-angle ⁇ of the cone is between 5° and 8°, for example 6.5°. This facilitates the insertion of the sleeve 26 in the through hole 24.
  • the narrow part of the truncated cone is directed towards the second portion 16 of the electrode.
  • the first portion 39A extends over a smaller proportion of the length of the internal wall 36I of the sleeve.
  • This localization of the break in section of the internal channel 38 makes it possible to create a localized spacing 41 between the sleeve 36 and the electrode 12 over a greater length proportion of the channel 19 than in the first embodiment illustrated in figure 6 .
  • the localized spacing 41 is therefore not only present between the first portion 14 of the socket and the second portion 39B of the internal wall, but also between a part of the second portion 16 of the socket and a part of the first portion 39A of the inner wall.
  • This reduced contact between the sleeve 36 and the electrode 12 makes it possible to limit the thermal conduction between these two elements, and therefore between the electrode 12 and the electrical conductor 28.
  • the second portion 16 of the electrode having a length of 10mm and the sleeve 36 having a length of 14mm
  • the first portion 39A of the internal wall of the sleeve extends over a length of 6 to 7mm.
  • the thickness of the sleeve 36 at the level of the second opening 38B is approximately 1mm.
  • connection lug 22 is located substantially equidistant from a free end of the sleeve on the one hand, here the end of the sleeve 36 on which the nut 40, and the first portion 39A of the inner wall on the other hand.
  • the connection lug 22 is 1.25mm away from the free end of the socket on the one hand, and from the first portion 39A on the other hand.
  • the connection terminal 22 is as far as possible from each of the heat sources which are the contact zones between the electrode 12 and the nut 40 on the one hand, and the electrode 12 and the first portion 39A of the internal wall on the other hand.
  • the internal wall 36I of the sleeve the internal wall of the sleeve 36 comprises a second portion 39C in the form of a truncated cone, of convergence opposite to that of the first portion 39A, whose half-angle at the apex ⁇ is greater at 5°, preferably greater than 11°.
  • the localized spacing 41 between the sleeve 36 and the electrode 32 is greater than in the first embodiment.
  • the electrical connection device 10 further comprises a protective cover (not shown) preferably made for example of metallic material comprising an electrically insulating coating or glass fibers, covering the connection member 20 and one end of the sleeve 36, here that opposite to the end in which the electrode 12 is inserted.
  • the protective cover makes it possible to electrically isolate the assembly made up of the connection device 10 and the electrode 12.
  • the cover is provided with a sleeve in which the conductor is intended to be inserted.
  • the protective cover To insert the protective cover, it is pre-inserted on the conductor by pre-threading the conductor in the sleeve. Then, the nut 40 is screwed onto the free end of the electrode 12. The sleeve is then slid along the conductor 28 until it covers the assembly consisting of the connection device 10 and the electrode 12 assembled. Once this installation has been carried out, a collar is placed which encloses the sleeve on the conductor, which is tightened until a lock is obtained.
  • the invention is not limited to the embodiments shown and other embodiments will be apparent to those skilled in the art. It is in particular possible to combine the embodiments presented.
  • the invention can also be used to be mounted on elements other than a motor vehicle catalyst electrode, and in particular any heat accumulating element.

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP22153724.4A 2021-01-27 2022-01-27 Elektrische verbindungsvorrichtung mit buchse Pending EP4037107A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2100774A FR3119273A1 (fr) 2021-01-27 2021-01-27 Dispositif de connexion électrique à douille amélioré

Publications (1)

Publication Number Publication Date
EP4037107A1 true EP4037107A1 (de) 2022-08-03

Family

ID=74860250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22153724.4A Pending EP4037107A1 (de) 2021-01-27 2022-01-27 Elektrische verbindungsvorrichtung mit buchse

Country Status (2)

Country Link
EP (1) EP4037107A1 (de)
FR (1) FR3119273A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444342A1 (fr) * 1978-12-16 1980-07-11 Lucas Industries Ltd Dispositif de connexion et d'isolation pour borne d'accumulateur electrique
FR2462031A1 (fr) * 1979-07-20 1981-02-06 Ermeto Dispositif de connexion plus particulierement destine aux batteries d'accumulateur
FR2918806A1 (fr) * 2007-07-10 2009-01-16 Peugeot Citroen Automobiles Sa Dispositif de raccordement mecanique et de liaison electrique a couple de serrage programme.
US20150244134A1 (en) * 2012-11-12 2015-08-27 Dubuis Et Cie Device for fixing an electrical connection terminal to a support
FR3091422A1 (fr) * 2018-12-26 2020-07-03 Safran Electrical & Power Élément de connexion électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444342A1 (fr) * 1978-12-16 1980-07-11 Lucas Industries Ltd Dispositif de connexion et d'isolation pour borne d'accumulateur electrique
FR2462031A1 (fr) * 1979-07-20 1981-02-06 Ermeto Dispositif de connexion plus particulierement destine aux batteries d'accumulateur
FR2918806A1 (fr) * 2007-07-10 2009-01-16 Peugeot Citroen Automobiles Sa Dispositif de raccordement mecanique et de liaison electrique a couple de serrage programme.
US20150244134A1 (en) * 2012-11-12 2015-08-27 Dubuis Et Cie Device for fixing an electrical connection terminal to a support
FR3091422A1 (fr) * 2018-12-26 2020-07-03 Safran Electrical & Power Élément de connexion électrique

Also Published As

Publication number Publication date
FR3119273A1 (fr) 2022-07-29

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