EP2722930A1 - Élément de contact avec revêtement - Google Patents

Élément de contact avec revêtement Download PDF

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Publication number
EP2722930A1
EP2722930A1 EP12188671.7A EP12188671A EP2722930A1 EP 2722930 A1 EP2722930 A1 EP 2722930A1 EP 12188671 A EP12188671 A EP 12188671A EP 2722930 A1 EP2722930 A1 EP 2722930A1
Authority
EP
European Patent Office
Prior art keywords
region
contact element
coating
tin
connection area
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.)
Withdrawn
Application number
EP12188671.7A
Other languages
German (de)
English (en)
Inventor
Markus Gaertner
Thomas Plinta
Sven Reinold
Markus Kerkhoff
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP12188671.7A priority Critical patent/EP2722930A1/fr
Priority to EP13166456.7A priority patent/EP2722931A1/fr
Priority to PCT/EP2013/071026 priority patent/WO2014060254A1/fr
Publication of EP2722930A1 publication Critical patent/EP2722930A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • H01R13/035—Plated dielectric material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • 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
    • H01R4/185—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 combined with a U-shaped insulation-receiving portion

Definitions

  • the invention relates to an electrical contact element having a contacting region for contacting a complementary contact element and a connection region for connection to an electrical conductor, wherein the connection region has a metallic coating.
  • a method for producing such a contact element As well as a method for producing such a contact element.
  • the alloy layer has to fulfill two different functions. In the area in which the aluminum conductor is contacted, the layer must be particularly conductive. In the area that is close to the surface of the aluminum conductor, and can establish an electrical connection via an electrolyte, the layer must protect well against corrosion. For a good conductivity, a high tin content is necessary whereas for a good corrosion protection a high zinc content is an advantage.
  • the invention has for its object to provide an electrical contact element made of copper, which in the connection area has a coating which conducts particularly well and at the points where electrolyte can electrically connect the different metals provides good corrosion protection. As well as a method for producing a contact element having these properties.
  • an electrical contact element having the features of claim 1 and in particular by the fact that the second region is provided with a metallic coating which differs from the coating of the first region and is suitable for reducing corrosion.
  • the invention utilizes selective and sequential deposition of tin and zinc monolayers on the terminal region, typically by electroplating.
  • the tin layer is applied to the connection area.
  • the zinc layer is applied to the tin layer.
  • the contact element is subjected to a heat treatment, which is referred to as annealing.
  • annealing the two layers mix to form an alloy.
  • the proportions of tin and zinc in the alloy result from the layer thicknesses of the respective layers.
  • any desired tin-zinc concentration can be adjusted.
  • contact elements are made of tinned copper sheet.
  • the contact element is separated from the support plate, wherein punching edges arise that have no tin coating and therefore are very susceptible to corrosion.
  • a second tin layer is applied to the tin layer already applied during tinning of the metal sheet.
  • the tin layer in the contacting region is thus significantly stronger than at the punching edge.
  • the zinc layer applied to the tin layer is rather thin in the contacting area, compared to the tin layer.
  • a subsequent heat treatment causes mixing of the layers.
  • the result is an alloy layer whose main components are tin and zinc.
  • the concentration of the shares is spatially different.
  • the second region adjoins the surface of the electrical conductor when the contact element is connected to an electrical conductor.
  • Tin and zinc alloys are preferably used for the coating.
  • the properties of these elements are well known in the art and have long been used in the industry. However, other metals which are electrically conductive and reduce the corrosion potential can also be used.
  • the coating in the first region has a higher tin content than the coating in the second region.
  • the coating in the second region has a higher zinc content than the coating in the first region. Since the second region adjoins the surface of the conductor, a higher zinc content in the coating is preferred for a corrosion-resistant layer.
  • a coating in the first range is preferred with a tin content in the range of 65% -100% and a zinc content in the range of 0% -35%. This ratio gives a very conductive bonding layer between the contact element and the aluminum conductor.
  • the coating in the second region comprises a tin content in the range of 50% -95% and a zinc content in the range of 5% -50%. This ratio creates a layer that provides good corrosion protection.
  • the layer thickness of the coating in the first region is preferably in the range of 1-10 ⁇ m and the layer thickness of the coating in the second region in the range of 0.1-5 ⁇ m.
  • the contact element consists of copper or a copper-based alloy.
  • copper alloys allows the mechanical and electrical properties of the contact element to be precisely adjusted.
  • connection region preferably has a crimp section with crimp wings and a holding region with holding wings.
  • the crimping section is arranged between two holding regions along an axis in order to fasten conductors, coming from opposite sides, together in the crimping section.
  • This arrangement wherein the axis can be seen as an extension of the conductor, allows greater flexibility in the positioning of the contact element. Narrow spaces often require a predetermined position of Kotaktelement to electrical conductors. This problem is mitigated by an additional firing option.
  • Another application of this embodiment is the use as a contact element for connecting two or more electrical lines together.
  • Splice Crimp Known in the art as Splice Crimp. In this case, the function of the contacting area is in the background and only the extended connection area is used.
  • galvanic processes are used for the coating.
  • the terminal region of the contact element is coated in a known manner, each with a layer of tin on the following a layer of zinc is applied.
  • This sequential coating by standardized coating processes enables the creation of a SnZn layer system.
  • the subsequent annealing process mixes tin and zinc.
  • temperatures in the range of 80 ° C - 240 ° C are used. ever After the selected temperature, the process time of tempering must be designed accordingly. At a temperature of 240 ° C, the annealing time is about 10 minutes. At a temperature of 80 ° C, the annealing time of about 12 hours to 48 hours.
  • the tempering is carried out according to the furnace used according to a corresponding process curve. In this case, the temperature profile is used for the required layers and thus produces the desired mixing at the corresponding areas.
  • the terminal area is used as known in the art.
  • This connection area already possesses a layer of tin which, however, is missing due to the process steps carried out in the production process.
  • the connection area is thus very well suited for being coated with the inventive method.
  • Another embodiment relates to a connecting line comprising an inventive contact element which is connected to an electrical conductor.
  • the electrical conductor is preferably made of aluminum or an aluminum alloy.
  • This connection line has a low electrical resistance and a high corrosion resistance.
  • Fig. 1 shows a known from the prior art contact element 1 in a perspective view. It has a contact region 2 and a connection region 3.
  • the connection region 3 is subdivided into a crimp section 10 and a holding region 11.
  • the crimp section 10 has two crimp wings 20 with which an electrical conductor (not shown here), by pressing the Crimperiel 20 around the conductor, can be electrically contacted.
  • the holding area 11 has two holding wings 22 which can be pressed onto the insulating layer of the conductor to improve the pull-off force.
  • the contact element 1 has a tin layer 7 covering the surface of the contact element. At the punching edge 6 this tin layer 7 is missing.
  • Fig. 2 shows a known in the prior art contact element 1 in a perspective view.
  • the contact element was connected in this illustration with a conductor 40.
  • the Crimperiel 20 enclose the electrical conductor 40.
  • the retaining wings 22 enclose the insulation 42 of the electrical conductor 40th
  • Fig. 3 shows a sectional view of the crimping portion 10 of in Fig.2
  • the contact extends vertically along axis A.
  • an electrical conductor 40 is connected to the contact element 1.
  • the contact element 1 has on its surface a tin layer 7 which is missing at the punched edge 6. This is due to the fact that in the manufacture of the contact element 1, a tinned copper sheet is used, from which the mold is punched out.
  • the conductor 40 is enclosed by the Crimperiel 20 after the pressing.
  • the tin layer 7 is located between the inside of the Crimpulatel 20 and the surface 41 of the conductor 40.
  • the punched edge 6 is located adjacent to the surface 41 of the conductor 40th
  • Fig. 4 shows a detail of the cut representation FIG. 3 ,
  • the illustrated region corresponds approximately to the circle marked B, but without representation of the conductor 40.
  • the inner side 5 of the crimping tab 20 has a tin layer 7. At the punching edge 6 this layer is missing.
  • Fig. 5 shows a view accordingly FIG. 4 however, after a tin layer 130 has been applied to the contact element 1. On the inside is now on the tin layer 7, a further tin layer 130. The punched edge 6 is covered only by tin layer 130.
  • FIG. 6 shows a view accordingly FIG. 5 wherein a layer of zinc was applied to the contact element.
  • the tin layers 7, 130 are covered by the zinc layer 131.
  • Fig. 7 shows a view accordingly FIG. 6 , This view time the contact element 1 after it has been subjected to a heat treatment.
  • the tin layers 7, 130 and the zinc layer 131 have mixed through the heat treatment. It has formed a layer that has regionally different tin-zinc mixing ratios.
  • the coating on the punching edge 6 contains a high proportion of zinc.
  • This zinc-tin alloy 141 is particularly resistant to corrosion.
  • the area outside the punching edge 6 contains a high tin content.
  • This tin-zinc alloy 140 is particularly conductive.
  • Fig. 8 shows a sectional view of the contact element after FIG. 1 after being coated with the inventive coating method.
  • the view corresponds to the view in Fig. 3 and also shows the crimp section 10 of the contact element 1.
  • the crimp wings 20 have on their inner side 5 a coating with the tin-zinc alloy 140.
  • the tin-zinc alloy 140 covers the entire crimping portion 10 except for the punched edge 6.
  • the punched edge is covered by the zinc-tin alloy 141.
  • the conductor 40 is enclosed by the Crimperiel 20 after the pressing.
  • the tin-zinc alloy layer is located between the inside 5 of the crimping section 10 and The surface 41 of the conductor 40. Between the punched edge 6 and the surface 41 of the conductor 40 are also a layer of zinc-tin alloy 141st

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Contacts (AREA)
  • Non-Insulated Conductors (AREA)
EP12188671.7A 2012-10-16 2012-10-16 Élément de contact avec revêtement Withdrawn EP2722930A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12188671.7A EP2722930A1 (fr) 2012-10-16 2012-10-16 Élément de contact avec revêtement
EP13166456.7A EP2722931A1 (fr) 2012-10-16 2013-05-03 Elément de contact électrique
PCT/EP2013/071026 WO2014060254A1 (fr) 2012-10-16 2013-10-09 Élément de contact électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12188671.7A EP2722930A1 (fr) 2012-10-16 2012-10-16 Élément de contact avec revêtement

Publications (1)

Publication Number Publication Date
EP2722930A1 true EP2722930A1 (fr) 2014-04-23

Family

ID=47022574

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12188671.7A Withdrawn EP2722930A1 (fr) 2012-10-16 2012-10-16 Élément de contact avec revêtement
EP13166456.7A Withdrawn EP2722931A1 (fr) 2012-10-16 2013-05-03 Elément de contact électrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13166456.7A Withdrawn EP2722931A1 (fr) 2012-10-16 2013-05-03 Elément de contact électrique

Country Status (2)

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EP (2) EP2722930A1 (fr)
WO (1) WO2014060254A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3575448A4 (fr) * 2017-01-30 2020-12-09 Mitsubishi Materials Corporation Matériau de borne pour connecteurs, borne et structure de partie d'extrémité de fil électrique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3012919B8 (fr) 2014-10-20 2019-01-09 Aptiv Technologies Limited Élément de contact électrique et méthode associée
PL227678B1 (pl) 2015-12-22 2018-01-31 Copernicus Spolka Z Ograniczona Odpowiedzialnoscia Układ sterująco-napędowy dla urządzenia do iniekcji oraz urządzenie do iniekcji zaopatrzone w taki układ
PL3108914T3 (pl) 2016-07-07 2019-08-30 Copernicus Sp. Z O.O. Urządzenie wstrzykujące do podawania określonej liczby jednakowych dawek substancji płynnej
JP6686965B2 (ja) 2017-05-16 2020-04-22 三菱マテリアル株式会社 錫めっき付銅端子材及び端子並びに電線端末部構造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030079997A1 (en) * 2001-10-11 2003-05-01 Enthone Inc. Method for coating metal surfaces
US20110014825A1 (en) * 2009-07-16 2011-01-20 Delphi Technologies, Inc. Electrical terminal connection with galvanic sacrificial metal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5597656A (en) * 1993-04-05 1997-01-28 The Louis Berkman Company Coated metal strip
US6136460A (en) * 1998-04-03 2000-10-24 Olin Corporation Tin coatings incorporating selected elemental additions to reduce discoloration
JP5237154B2 (ja) * 2009-03-04 2013-07-17 株式会社オートネットワーク技術研究所 圧着端子および端子付き電線

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030079997A1 (en) * 2001-10-11 2003-05-01 Enthone Inc. Method for coating metal surfaces
US20110014825A1 (en) * 2009-07-16 2011-01-20 Delphi Technologies, Inc. Electrical terminal connection with galvanic sacrificial metal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3575448A4 (fr) * 2017-01-30 2020-12-09 Mitsubishi Materials Corporation Matériau de borne pour connecteurs, borne et structure de partie d'extrémité de fil électrique
US11211729B2 (en) 2017-01-30 2021-12-28 Mitsubishi Materials Corporation Terminal material for connectors, terminal, and electric wire termination structure

Also Published As

Publication number Publication date
WO2014060254A1 (fr) 2014-04-24
EP2722931A1 (fr) 2014-04-23

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