EP4002592A1 - Connecteur pour une conduite électrique et raccordement de conduite - Google Patents

Connecteur pour une conduite électrique et raccordement de conduite Download PDF

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Publication number
EP4002592A1
EP4002592A1 EP20306412.6A EP20306412A EP4002592A1 EP 4002592 A1 EP4002592 A1 EP 4002592A1 EP 20306412 A EP20306412 A EP 20306412A EP 4002592 A1 EP4002592 A1 EP 4002592A1
Authority
EP
European Patent Office
Prior art keywords
contact
opening
receiving chamber
connection part
spring
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.)
Granted
Application number
EP20306412.6A
Other languages
German (de)
English (en)
Other versions
EP4002592B1 (fr
Inventor
Michael FENEIS
Helmut Steinberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP20306412.6A priority Critical patent/EP4002592B1/fr
Priority to ES20306412T priority patent/ES2989484T3/es
Publication of EP4002592A1 publication Critical patent/EP4002592A1/fr
Application granted granted Critical
Publication of EP4002592B1 publication Critical patent/EP4002592B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • 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
    • H01R11/282—End pieces consisting of a ferrule or sleeve for connections to batteries comprising means for facilitating engagement or disengagement, e.g. quick release terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
    • H01R4/4863—Coil spring
    • H01R4/4872—Coil spring axially compressed to retain wire end
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/514—Bases; Cases composed as a modular blocks or assembly, i.e. composed of co-operating parts provided with contact members or holding contact members between them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the invention relates to a connection part for an electrical line and a line connection with such a connection part.
  • Aluminum conductors are increasingly being used as a replacement for copper conductors, particularly for reasons of weight and cost.
  • the main areas of use for such conductors are, for example, automotive and aircraft technology.
  • the conductors are preferably used as stranded conductors.
  • the lower electrical conductivity of aluminum compared to copper is irrelevant for most applications.
  • the individual wires are surrounded by an oxide layer that cannot be avoided without special treatment. This problem has been known for a long time. Electrical lines with such a conductor, which is expediently surrounded by a jacket made of insulating material, are often installed in vehicles. In order to be able to install such lines in production effectively and in a time-saving manner, the lines are provided with electrical contact parts at their ends, which are also referred to as "terminals".
  • the strands of the conductor are made of either aluminum or an aluminum alloy.
  • aluminum is used below to designate both aluminum and alloys thereof.
  • connection element is pushed onto a stranded conductor and then crimped.
  • connection element is provided with different connection elements.
  • the connection element is produced as a one-piece component by deep-drawing and bonded to the conductor by friction stir welding. Suitable connection elements and tools adapted to these must be kept ready for different applications.
  • connection element In order to simplify the number of different components and thus storage, the EP 3451 455B1 before forming the connection element in two parts.
  • a contact sleeve is welded to the stranded conductor and then a contact part that matches the specific application is welded to the end face of the contact sleeve.
  • complex contact part geometries which entail the problem that the welding point, where the contact part is welded to a line, is not accessible to a friction stir welding tool.
  • connection with a line and a contact part cannot usually be detached without being destroyed.
  • This is a disadvantage for charging contacts in a charging socket in an electric vehicle.
  • the charging contacts in a charging socket wear out and have to be replaced after a certain number of plugging cycles. If the cable connected to a charging contact cannot be detached without destroying it, replacing the charging contacts is a costly repair.
  • the present invention has the object of creating a connecting part in order to overcome or at least improve one or more of the problems mentioned at the outset.
  • the invention proposes, according to a first aspect, a connection part for an electrical line with a base body that has two end faces and a number of main faces.
  • a passage opening for the electrical line is provided in a first end face.
  • the through-opening is followed by a contact-receiving chamber, which is arranged between the through-opening and a spring-receiving chamber, in which an elastic spring means is accommodated.
  • the through-opening has a smaller diameter than the contact-receiving chamber, so that there is a step at a transition between the through-opening and the contact-receiving chamber.
  • One or more projections are located in the contact-receiving chamber adjacent to the step.
  • connection part is suitable for establishing a mechanical and electrical connection with an electrical line in a simple manner and without tools by first compressing the spring means with the line in order to insert the contact sleeve into the contact-receiving chamber. If the compressive force that compressed the spring means is removed again, then the spring means pushes the contact sleeve under the projection or projections. In this way, the contact sleeve and thus also the electrical line are held in the connecting part in a positive and non-positive manner.
  • an opening extends in a first main surface in the area of the passage opening and the contact-receiving chamber.
  • This opening facilitates the assembly of the electrical line in the connection part, because the line with the contact sleeve can be inserted through the opening in the connection part.
  • the opening extends into the area of the spring receiving chamber.
  • the spring means can also be inserted into the connection part in a simple manner.
  • the opening in the area of the passage opening and in an area of the contact-receiving chamber that adjoins the passage opening has a first width b1, while the width of the opening in the remaining area of the contact-receiving chamber increases to a width b2 that essentially corresponds to the diameter d2 of the contact-receiving chamber.
  • the first width b1 corresponds to a diameter d1 of the passage opening.
  • the different widths of the opening are matched to the diameter of the contact sleeve or the line and, on the one hand, allow the contact sleeve to be easily inserted into the connection part and, on the other hand, ensure that the line or the contact sleeve is held securely in the connection part.
  • the projection or projections can expediently be formed in the embodiment with the stepped width of the opening.
  • the different widths of the opening make it possible in a simple manner to provide the projection or projections with which the contact sleeve and the line are held in the connection part.
  • connection part In a further advantageous exemplary embodiment of the connection part, the main surface in which the opening is arranged is completely or partially closed in the area of the spring receiving chamber.
  • the spring receiving chamber can be completely or partially closed in order to prevent a spring means from falling out of the connection part.
  • a tensioning device for the spring device is arranged in the spring receiving chamber.
  • the presence of a clamping device has the advantage that different contact pressures can be set without different components having to be kept ready for this purpose.
  • Complementary connecting means are advantageously arranged on a second and third main surface of the connection part.
  • the complementary connection means are, for example, keyholes with corresponding pins or a dovetail connection, each of which enables a form-fitting connection of connecting parts lying next to one another.
  • connection means are provided on the second end face of the connection part, which enable a mechanical and electrical connection to an intermediate piece.
  • the intermediate piece is designed in such a way that a connecting part can be connected at the front from both sides.
  • connection part is connected to a contact.
  • the contact can be a cable lug, for example.
  • the cable lug can be welded or soldered to the connection part or can also be produced in one piece with the connection part by forming. Together with the contact, the connection part forms a contact part.
  • a two-part contact part has advantages with regard to the variety of parts because a uniform connection part can be connected to different contacts for different applications. A different contact part does not have to be provided for each application, only contacts that are to be connected to the connection part.
  • the spring means can expediently be designed as a helical spring or a spring lamella.
  • a line connection for an electrical line stripped at the end is proposed.
  • a contact sleeve is arranged at the end of the line.
  • the stripped end of the line is inserted into a connection part according to one of the preceding claims.
  • the contact sleeve is held in a non-positive and positive manner.
  • the line connection according to the invention it is possible in a simple manner to electrically connect different metals to one another. This is an advantage in particular in the case of stranded aluminum conductors, in which the difficulties described above have to be overcome.
  • the invention can also be used for stranded conductors made from other metals, in particular stranded conductors made from copper.
  • Figure 1A shows schematically a line 100 which has an electrical conductor 101 which is made up of a multiplicity of individual wires 102 stranded together and which is surrounded by insulation 103 .
  • the insulation 103 is removed from the conductor 101 in a section 104 .
  • a contact sleeve 105 made of copper, a copper alloy, aluminum or an aluminum alloy is pushed onto the stripped area of the conductor 101 .
  • the contact sleeve 105 is only open on one side and has a bottom 106 on the opposite side, which rests against the end face 107 of the conductor 101 when the contact sleeve 105 is pushed onto the conductor.
  • the contact sleeve 106 is open on both sides.
  • the contact sleeve 105 Before assembly, the contact sleeve 105 has an inner diameter that is larger than the outer diameter of the conductor 101 in order to enable the contact sleeve 106 to be pushed onto the conductor 101 without any problems, without bending or "brushing" individual wires 102 of the conductor 101.
  • the contact sleeve 105 When the contact sleeve 105 has reached its assembly position, it is pressed or crimped onto the conductor. The contact sleeve 105 then sits firmly on the conductor 101.
  • a rotary tool 108 in Figure 1A is shown purely schematically, is set in rotation, which is indicated by an arrow 109.
  • the rotary tool 108 is then pressed against the end face 107 of the conductor with a force F, the direction of the force F being in Figure 1A indicated by arrow 110.
  • the rotary tool 108 effects stir-friction welding, as a result of which the metal of the individual wires 102 and of the contact sleeve 105 changes to a pasty, flowable state, which thereby fuses with one another. With this process it is possible to weld very different metals such as copper and aluminum and their alloys together.
  • the result is a welded area 111 on the end face 107, which Figure 1B is shown in black.
  • FIG. 2A shows a connection part 200 according to the invention in a perspective view.
  • the connecting part 200 has a cuboid base body 201 with two end faces 202, 203 and four main faces, of which in Figure 2A only the two main surfaces 204,205 are visible.
  • the main surface 204 lying at the top has an opening 208 which extends over the entire length L of the base body 201 .
  • the base body 201 is also provided with a passage opening 211 for a line 100 ( Figure 3A ), with a contact receiving chamber 213 for a contact sleeve 105 ( Figure 1B ) and provided with a spring receiving chamber 216 for a spring means.
  • the spring means is designed as a coil spring 217.
  • the through hole 211 as well as the contact receiving chamber 213 and the spring receiving chamber 216 are formed in FIG Figure 2A
  • the area below is semicircular and continues with straight flanks towards the opening 208, so that a substantially U-shaped cross section is formed.
  • the through hole 211 has a diameter d1, which is smaller than a diameter d2 of the contact-receiving chamber 213.
  • the diameter d1 of the through-hole 211 corresponds to a width b1 of the opening 208 in the area of the through-hole 211.
  • the diameter d2 of the contact-receiving chamber 213 corresponds to a width b2 of the opening 208 in the area of the contact-receiving chamber 213.
  • the width b1 is also smaller than the diameter d2 or the width b2.
  • the semi-circular areas of the through-hole 211 and the contact-receiving chamber 213 are concentric, so that the different diameters d1 and d2 result in a step 218 at the transition between the contact-receiving chamber 213 and the through-hole 211 .
  • Two projections 219 which protrude into the contact-receiving chamber 213 are arranged in a transition area between the passage opening 211 and the contact-receiving chamber 213 .
  • Figure 2B shows a cross section through the base body 201 along the line BB, which is shown in Figure 2A is shown.
  • Figure 2B shows a step 218 and the projections 219 are clearly visible.
  • the geometry of the opening 208 is in Figure 2C shown, which shows a top view of the base body 201 or of the opening 208 in the base body 201 .
  • a dashed line 220 indicates the boundary between contact receiving chamber 213 and spring receiving chamber 216.
  • the projections 219 result from the fact that the opening 208 does not extend over the entire length of the contact-receiving chamber 213 with the width b2, but is reduced to the width b1.
  • the opening 208 thus has a width b1 over a length composed of the length of the through hole 211 and the projections 219 .
  • the spring receiving chamber 216 has the same diameter d2 as the contact receiving chamber 213. In the area of the spring receiving chamber 216, the opening 208 has the same width b2 as the contact receiving chamber 213.
  • a thread 221 for a clamping screw 222 is cut into the spring receiving chamber 216.
  • the diameter d2 corresponds to the diameter of the core bore of the thread 221.
  • the outer diameter of the screw shank of the clamping screw 222 is therefore slightly larger than the diameter d2, so that the clamping screw 222 is held in the thread 221 and cannot fall out.
  • the turnbuckle 222 has a tapered tip (in Figure 2A covered), whose diameter is slightly smaller than the inner diameter of the coil spring 217, whereby the coil spring sits with a press fit on the screw tip.
  • the position of the helical spring 217 in the spring receiving chamber 216 also changes.
  • the thread 221 can also deviate from the representation in FIG Figure 2C extend to the end of spring receiving chamber 216 marked with dashed line 220 .
  • a cover or a cap is provided instead of the clamping screw 222 , which closes the spring receiving chamber on the end face 203 and serves as a support for the spring means 217 .
  • the cover can be designed in such a way that the opening 208 is partially covered and the spring means 217 therefore cannot fall out of the spring receiving chamber 216 .
  • the cover or the cap seals the end face 203 of the base body 201 .
  • the cover or the cap is expediently made of plastic and clipped onto the base body 201 .
  • the plastic can be electrically conductive or non-conductive.
  • connection part 200 in the production of an electrical and mechanical connection with a line 301 is explained.
  • clamping screws 222 in the connection parts in FIGS Figures 3A to 3C Not shown.
  • Figure 3A shows a connecting part 200 and a line 100 held by a fitter over the window 208.
  • a contact sleeve 105 is welded onto the line 100, as described in connection with FIG Figure 1B was explained.
  • the lead 100 is held at a slight angle with the contact sleeve 105 first and lowered into the contact receiving chamber 213 in a direction Rv.
  • the line 100 is lowered into the passage opening 211, as a result of which the in Figure 3B situation shown is reached.
  • the fitter now removes the compressive force, whereupon the spring means 217 expands and the contact sleeve 105 presses against the step 218 in the opposite direction to R S .
  • the projections 219 overlap the contact sleeve 105, as shown in Figure 3C is shown.
  • the contact piece 105 is now held in the connection part 200 in a non-positive and positive manner. The mechanical and electrical connection between the line 100 and the connection part 200 is thus established.
  • the line 100 is sealed in the fitting 200 with a single wire seal and the turnbuckle 222 with a thread seal.
  • a cover is placed on the opening 208, for example clipped or latched, in order to close the opening 208 after the line 100 has been installed.
  • the sealing means mentioned are known in the prior art and are therefore omitted from the figures for the sake of clarity.
  • the position of the helical spring 217 can be changed with the clamping screw 222 . In this way, different pressing forces can be realized, with which the contact sleeve 105 is pressed against the step 218.
  • connection part 200 which is connected to a cable lug 401 .
  • the cable lug 401 is welded to the connection part 200 or manufactured in one piece with the connection part 200, for example by moulding.
  • the cable lug 401 is shown as representative of different contact elements, which can include contact tongues, plugs, sockets, etc., for example.
  • connection parts 200 are connected to one another in a form-fitting manner and, for this purpose, have connecting means which are complementary to one another on the main surface 205 and the opposite main surface.
  • keyhole openings 403 are shown by way of example, into which corresponding lens-head pins, which are arranged on the opposite side, can be inserted.
  • a dovetail connection is present as the connection means.
  • connection arrangement 404 in which two connection parts 200 are connected to one another with their end faces 203 .
  • connecting means (not shown) are arranged on the end faces 203, which engage with complementary connecting means on an intermediate piece 406 and produce a positive connection between one of the connection parts 200 and the intermediate piece 404 in each case.
  • bayonet-lock-like connecting means are provided as connecting means.
  • the connection arrangement 404 is particularly suitable for lengthening an electrical line 100 .
  • the present invention is not limited thereto and can also be used with stranded conductors made of other metals.
  • the invention can also be used for solid conductors. All that is required is that a contact sleeve be severed onto the solid conductor, forming a shoulder that engages the step 218 in the connector 200.
  • a typical area of application of the present invention is vehicle construction, in particular in vehicles with an electric drive, in which a large number of high-voltage electrical lines have to be connected.
  • the invention is not limited to such areas of application, but is also suitable for stationary applications such as, for example, in domestic installations or in energy supply networks.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP20306412.6A 2020-11-19 2020-11-19 Connecteur pour une conduite électrique et raccordement de conduite Active EP4002592B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20306412.6A EP4002592B1 (fr) 2020-11-19 2020-11-19 Connecteur pour une conduite électrique et raccordement de conduite
ES20306412T ES2989484T3 (es) 2020-11-19 2020-11-19 Pieza de conexión para una línea eléctrica y conexión de línea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20306412.6A EP4002592B1 (fr) 2020-11-19 2020-11-19 Connecteur pour une conduite électrique et raccordement de conduite

Publications (2)

Publication Number Publication Date
EP4002592A1 true EP4002592A1 (fr) 2022-05-25
EP4002592B1 EP4002592B1 (fr) 2024-07-03

Family

ID=73654742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20306412.6A Active EP4002592B1 (fr) 2020-11-19 2020-11-19 Connecteur pour une conduite électrique et raccordement de conduite

Country Status (2)

Country Link
EP (1) EP4002592B1 (fr)
ES (1) ES2989484T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2735397A1 (fr) 2012-11-23 2014-05-28 Nexans Procédé de connection électrique d'une pièce de contact à un conducteur électrique et système associé
US20180076533A1 (en) * 2016-09-09 2018-03-15 Hubbell Incorporated Splice with tap clamp
US20190013596A1 (en) * 2017-07-07 2019-01-10 Avx Corporation Wire-to-wire connector with integrated wire stop
EP3451455B1 (fr) 2017-09-01 2019-11-06 Nexans Procédé de fabrication d'une liaison électrique et une ligne électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2735397A1 (fr) 2012-11-23 2014-05-28 Nexans Procédé de connection électrique d'une pièce de contact à un conducteur électrique et système associé
US20180076533A1 (en) * 2016-09-09 2018-03-15 Hubbell Incorporated Splice with tap clamp
US20190013596A1 (en) * 2017-07-07 2019-01-10 Avx Corporation Wire-to-wire connector with integrated wire stop
EP3451455B1 (fr) 2017-09-01 2019-11-06 Nexans Procédé de fabrication d'une liaison électrique et une ligne électrique

Also Published As

Publication number Publication date
ES2989484T3 (es) 2024-11-26
EP4002592B1 (fr) 2024-07-03

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