WO2016139018A1 - Élément de contact électrique - Google Patents

Élément de contact électrique Download PDF

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Publication number
WO2016139018A1
WO2016139018A1 PCT/EP2016/051770 EP2016051770W WO2016139018A1 WO 2016139018 A1 WO2016139018 A1 WO 2016139018A1 EP 2016051770 W EP2016051770 W EP 2016051770W WO 2016139018 A1 WO2016139018 A1 WO 2016139018A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact layer
band
laser
contact element
element according
Prior art date
Application number
PCT/EP2016/051770
Other languages
German (de)
English (en)
Inventor
Wolfgang Hamm
Alois Schmid
Hemann G. KÖHLER
Original Assignee
Inter Control Hermann Köhler Elektrik GmbH & Co. KG
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 Inter Control Hermann Köhler Elektrik GmbH & Co. KG filed Critical Inter Control Hermann Köhler Elektrik GmbH & Co. KG
Publication of WO2016139018A1 publication Critical patent/WO2016139018A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0016—Brazing of electronic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/005—Soldering by means of radiant energy
    • B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/22—Spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/244—Overlap seam welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—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
    • 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
    • H01R43/0221—Laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B23K2103/22—Ferrous alloys and copper or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B23K2103/26—Alloys of Nickel and Cobalt and Chromium

Definitions

  • the present invention relates to an electrical contact element, in particular a switching spring, preferably a switching spring for a thermal temperature controller or a thermal fuse.
  • Spring-loaded electrical contact elements comprise a band-shaped support made of a resilient, electrically highly conductive material and an areal limited contact layer of a material with low electrical resistance (eg Ag or an Ag alloy), which is located on a flat side of the band-shaped support is located and firmly connected to the latter.
  • Such contact elements are commonly used in thermal temperature controllers and thermal fuses as switching springs.
  • the switching spring is held under pretension on the mating contact via a holding element, which in turn is connected to a thermo-reactive component (eg bimetal).
  • a thermo-reactive component eg bimetal
  • the contact is closed again, provided that the thermal component due to temperature moves back to the starting position and the switching spring is thereby pressed back into the closed position of the electrical contact.
  • the holding function of the switching spring irretrievably.
  • An electrically conductive contact layer is applied to a band-shaped carrier made of a resilient, electrically conductive material usually by resistance welding.
  • the electrically conductive contact layer must be It is provided with a further, less electrically conductive layer, which serves as a welding aid (eg a Cu alloy).
  • This additional layer serves as a necessary thermal reservoir for the resistance welding process.
  • At the contact surface of the welding aid upstanding, longitudinally extending welding webs are provided, which serve to initiate the welding process by a peak ignition taking place there.
  • an electrically conductive connection contact has to be attached to the upper side of the electrically conductive contact layer during resistance welding.
  • the method has the disadvantage that due to the upstanding on the underside of the welding aid welding webs it can often lead to a permanent gap formation between the band-shaped carrier and the electrically conductive contact layer. Moreover, due to the top electrical connection contact during welding, the top of the electrically conductive contact layer may be contaminated. Gaps as well as impurities of the contact layer and the less electrically conductive intermediate layer lead to an undesirable increase in the contact resistance. There is therefore a need to improve the quality of the connection of a band-shaped carrier made of resilient, electrically conductive material with an electrically conductive contact layer.
  • US Pat. No. 7,592,566 B2 already discloses a method for connecting a copper-based carrier to a silver-based contact layer by means of a laser welding process.
  • the laser weld seam is produced along the outer edge region of the contact layer in the region of the contact seam between the carrier and the contact layer.
  • the irradiation angle of the laser is therefore inclined in the range of 5 ° to 20 ° with respect to the surface of the carrier.
  • a proportion of at least 70% of the melt produced by the laser beam should occur in the region of the carrier. This is procedurally extremely difficult to ensure.
  • This process requires a high expenditure on equipment. Incidentally, it is not suitable for thin contact layers.
  • a laser welding structure and a laser welding method in which a conductor is connected at its end-side end region with a conductive component via a punctiform weld. Both the conductor and the conductive component are provided with a nickel plating layer on both their top and bottom surfaces which have a lower melting point and a lower laser reflectance than the conductor or the component itself.
  • the nickel plating layer serves to accelerate the melting of the conductor or component.
  • a corresponding nickel plating layer is disadvantageous in an electrical contact element of the type mentioned, since it increases the contact resistance.
  • GB 2 327 300 A discloses an electrical contact with a band-shaped carrier made of resilient, electrically conductive CuBe, on the upper side of which a silver wire is fixed by means of a multiplicity of laser welding points arranged on both sides in the lateral contact region of the silver wire.
  • the laser welding points lie at an acute angle between the carrier and the contact wire. Again, the laser beam must be positioned laterally inclined. This method also requires a high expenditure on equipment.
  • the object of the present invention is to provide an electrical contact element with reduced contact resistance with simplified manufacture.
  • the invention makes it possible to an electrical contact element with a band-shaped carrier made of a resilient, electrically conductive material of low thickness with a pad or pad-shaped electrically conductive contact layer also low strength, which is located on a flat side of the band-shaped carrier on apparatus easy way to connect reliably. At the same time, a reduced contact resistance compared with the conventional method can be achieved.
  • the laser beam is positioned perpendicular to the back of the carrier, radiating through the carrier and penetrates only in a slight, defined depth in the carrier-facing surface of the electrical contact material.
  • the type of laser welding connection according to the invention is due to the large-area, but comparatively gentle, energy input into the contact layer that thin layers can be effectively connected to each other without an additional (such as a contact resistance increasing) welding aid, such as a Cu alloy.
  • the electrically conductive contact layer in particular in the case of thin contact layers, remains unchanged in its starting geometry. It is advantageous that the upper contact surface remains undamaged. This results in improved contact properties.
  • a plurality of elongate laser weld seams can be arranged, for example, running parallel to one another in the carrier.
  • the profile of the respective laser weld seam can also be circular, curved, rectangular and / or meander-shaped. This ensures a large-area bond with a comparatively low energy input and penetration depth of the melted area into the contact layer.
  • a surface pattern formed from a multiplicity of individual welding cones can be provided to ensure a laminar bond. This also makes possible a large-area connection with a comparatively low energy input as well as a reduced penetration depth of the welding cone into the contact layer.
  • the laser welding seam or the laser welding cone extends from the band-shaped support in each case up to a maximum of only a quarter, preferably up to a maximum of only one fifth of the layer thickness H1 of the contact layer into the latter.
  • This unusual, very slight weld entry is made possible by the large-area laser welding connection and at the same time results in a sufficient real useful layer remaining in the contact layer, ie laser-weld-related defects only on a very small layer area of the contact layer, i. Wear layer, remain limited.
  • the laser welding seam or the laser welding cone extends from the band-shaped support, each extending to a maximum of 0.08 mm, preferably to a maximum of 0.06 mm, into the contact layer. Due to the fact that the extrapolated cross-sectional contour of the laser weld seam or of the weld cone respectively has an opening angle of at least 60 °, preferably of at least 80 °, a sufficient hold is nevertheless observed with a very small penetration depth of the laser weld into the contact layer when viewed over the areal laser weld joint guaranteed.
  • the thickness of the band-shaped carrier is in the range of 0.1 to 0.3 mm.
  • the thickness of the contact layer is in the range of 0.1 to 0.4 mm.
  • the electrically conductive material of the band-shaped carrier is expediently a Cu alloy, preferably a CuCoBe alloy or a CuBe alloy or a NiBe alloy.
  • the material of the band-shaped carrier can also be a metal provided with a conductive layer, for example a steel strip.
  • the belt-shaped carrier and the contact layer may be welded to each other in a planar manner without gap formation and without an intermediate layer serving as a welding aid (i.e., preferably without a Cu alloy).
  • a welding aid i.e., preferably without a Cu alloy.
  • a phosphor bronze layer can also be present between the strip-shaped carrier and the contact layer, which as an additional solder ensures a particularly intimate connection between carrier and contact layer.
  • This phosphor bronze layer is particularly suitable for a band-shaped support of a copper alloy or a support made of metal, which is provided with a conductive layer (for example, silver or a silver alloy).
  • Fig. 1 is a sectional view of a thermal temperature controller
  • Fig. 2 is a sectional view of a thermal fuse
  • Fig. 3 is an isolated view of the contact element of Figure 1 in plan view from above (Fig. 3a) and in section along the sectional plane A-A of Figure 3a ( Figure 3b).
  • Fig. 4 is a greatly enlarged sectional view through the band-shaped
  • the reference numeral 7 in Fig. 1 shows a so-called thermal temperature controller with a housing 9 and two arranged on the top of the housing connector 8 for connecting the temperature controller in an electrical circuit see.
  • the left in Fig. 1 connector is connected to a switch spring 1 in the region of the so-called switching spring root 1 a and is located in the region of the switching spring end 16 with its opposite end to a mating contact 12 of the adjacent connector 8 in the closed position of the temperature controller 7.
  • the switching spring 1 is provided there with a contact layer 3.
  • the switching spring 1 is held in the closed position by means of an actuating element 1 1, whose underside end is in turn connected to a bimetallic disc 10 in connection.
  • Fig. 2 thermal fuse 13, in which instead of the bimetallic disc 10 in Fig. 1, a fusion pellet 17 on the underside of the actuating element 1 1 is arranged. If the melting pellet 17 is destroyed due to temperature, the actuating element 16 located in the housing 15 moves downwards and the contact held on the switch contact 1 on the mating contact 12 of the connector 14 is opened due to the bias of the contact spring 1.
  • a contact layer 3 is likewise provided.
  • the arranged on the switching spring 1 contact layer 3 has the lowest possible resistance. High resistances lead to increased temperature in the contact layer and thus often lead to premature destruction due to frequent during switching operation arcing.
  • FIGS. 3a and 3b show a corresponding switching spring 1 in an isolated representation, on the one hand in plan view (FIG. 3a) and on the other in a sectional view along the sectional plane AA in FIG. 3a (FIG. 3b).
  • Reference numeral 1 a denotes the so-called shift spring root, reference numeral 1 b, the switching spring end.
  • the switching spring comprises a band-shaped carrier 2 made of an elastic, electrically conductive material.
  • the material is expediently a Cu alloy, preferably a CuCoBe alloy or a CuBe alloy.
  • the band-shaped carrier 2 may also consist of a NiBe alloy.
  • the material of the band-shaped carrier 2 can also be a stainless steel band which is provided with a conductive layer, for example an Ag layer or a layer of an Ag alloy.
  • the layer thickness of the Ag layer is in the range of 0.01-0.1 mm.
  • the thickness of the band-shaped carrier for both alternatives is in the range of up to a maximum of 0.5 mm, preferably in the range of 0.1 to 0.3 mm.
  • a surface limited contact layer 3 is applied to the carrier 2.
  • the contact layer 3 shown in FIG. 3a has a pillow-shaped or pad-shaped form.
  • the contact layer is a noble metal or noble metal alloy layer, preferably an Ag layer or an Ag alloy layer. Likewise comes Au or Pt or an Au or Pt alloy in question.
  • the thickness of the contact layer is a maximum of 0.5 mm. It is preferably in a range of 0.1-0.4 mm.
  • the contact layer 3 is connected to the carrier 2 via a particularly configured laser welding connection.
  • the reference numeral 4 denotes a laser weld in cross section.
  • the laser weld 4 extends both over the total thickness H2 of the carrier 2 and into a partial region H3 of the carrier 2 facing surface of the contact layer 3 inside.
  • the penetration depth H3 is selected so that it constitutes only a maximum of a quarter of the total thickness H1 of the contact layer 3, preferably one fifth of the total thickness H1 of the contact layer 3. It is thus considered selectively in Fig. 4 a only slight energy input, ie a slight melt entry, causes in the contact layer 3.
  • the opening angle of the extrapolated cross-sectional contour of the weld 4 has at least 60 °, preferably at least 80 °. This makes it possible to set the penetration depth H3 of the melt particularly slightly.
  • a laser is positioned in a direction of incidence perpendicular to the underside of the carrier 2, as shown schematically in FIG.
  • a laser welding of the carrier 2 with the contact layer 3 in the case of the abovementioned special materials without a welding aid, in particular without a Cu alloy.
  • the contact resistance between contact layer 3 and carrier 2 can be minimized, and on the other hand a sufficient wear layer remains in contact layer 3 and the welding process can still be carried out in a simple apparatus arrangement, also automated.
  • the outer edge region of the contact layer 3 is free of a laser weld.
  • FIGS. 5a-5g each show different embodiments of a large-area laser welding connection in a plan view of the carrier 2 from below.
  • the large-area laser welding connection can be realized from a number of laser welding seams 4 extending over a large area over the area of the contact layer 3.
  • a single laser weld 4 for example, in a meandering course over large surfaces of the contact layer 3 extend, as shown in Fig. 5b.
  • different geometric shapes, such as at least one, preferably a plurality of nested, rectangular laser welds 4 may be provided (FIG. 5c).
  • a plurality of individual punctiform laser welding cones 4a extend over the surface of the contact layer 3.
  • the laser weld seam 4 at least in regions, also be arranged running in the immediate vicinity of the outer edge of the contact layer 3, for example in the immediate vicinity of the outer edge extending (Fig. 5b and Fig. 5e) or in a circular or curved course (Fig. 5f).
  • the ratio of the welded surface to the unwelded surface of the contact layer 3 increases from the side of the contact layer 3 facing the switching spring root 1a to the side of the contact layer 3 facing the switching spring end 1b ,
  • the types of welded connection shown in FIGS. 5f and 5g are examples only. Of course, any other shapes can be chosen to adjust the gradual change in the spring characteristics of the shift spring root 1 a to the shift spring end 1 b.
  • a phosphor bronze layer 6 can be provided in the connection region of the carrier 2 and the contact layer 3 according to FIG. 6, which acts as additional solder.
  • the present invention ensures a connection of a band-shaped elastic support 2 made of electrically conductive material with a contact layer 3 thereon also low strength without gap formation with reduced electrical resistance and without the need for a Cu alloy.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
  • Manufacture Of Switches (AREA)

Abstract

La présente invention concerne un élément de contact électrique, en particulier un ressort de commutation, de préférence un ressort de commutation destiné à un thermostat thermique ou un fusible thermique. L'élément de contact comprend un support (2) en forme de bande en matière élastique, électriquement conductrice, et une couche de contact (3) électriquement conductrice qui est située sur un côté plat du support (2) en forme de bande et qui est relié à celui-ci. En outre, il est prévu que le support (2) en forme de bande et la couche de contact (3) soient reliés entre eux au moyen d'une liaison bidimensionnelle par soudage au laser, la liaison par soudage au laser comporte un cordon de soudure au laser (4) ou un cône de soudure au laser (4a) qui s'étend complètement à travers la surface en coupe transversale du support (2) en forme de bande dans une zone partielle de la surface en coupe transversale de la couche de contact (3) adjacente et, pour obtenir la liaison bidimensionnelle par soudage laser, (a) une pluralité de cordons de soudure laser (4) allongées sont disposées le long de la surface du support (2) en forme de bande, (b) un cordon de soudure au laser (4) s'étend selon une orientation bidimensionnelle, et/ou (c) une pluralité de cônes de soudure au laser (4a) sont disposés avec une répartition bidimensionnelle.
PCT/EP2016/051770 2015-03-03 2016-01-28 Élément de contact électrique WO2016139018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015103003.9 2015-03-03
DE102015103003.9A DE102015103003B3 (de) 2015-03-03 2015-03-03 Elektrisches Kontaktelement

Publications (1)

Publication Number Publication Date
WO2016139018A1 true WO2016139018A1 (fr) 2016-09-09

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WO (1) WO2016139018A1 (fr)

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CN110340521A (zh) * 2019-07-19 2019-10-18 中国第一汽车股份有限公司 一种铜和镍的激光焊接方法

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DE202016104274U1 (de) * 2016-08-04 2017-11-08 INTER CONTROL Hermann Köhler Elektrik GmbH & Co KG Thermische Schalteinrichtung

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