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EP1602153B1 - Materiaux de mousse metallique pour contact des connexions electriques - Google Patents

Materiaux de mousse metallique pour contact des connexions electriques Download PDF

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Publication number
EP1602153B1
EP1602153B1 EP03786039A EP03786039A EP1602153B1 EP 1602153 B1 EP1602153 B1 EP 1602153B1 EP 03786039 A EP03786039 A EP 03786039A EP 03786039 A EP03786039 A EP 03786039A EP 1602153 B1 EP1602153 B1 EP 1602153B1
Authority
EP
European Patent Office
Prior art keywords
foam
contact
electrical
copper
connection
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.)
Expired - Lifetime
Application number
EP03786039A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1602153A1 (fr
Inventor
Michel Pillet
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.)
AMC SARL
Original Assignee
AMC SARL
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 AMC SARL filed Critical AMC SARL
Publication of EP1602153A1 publication Critical patent/EP1602153A1/fr
Application granted granted Critical
Publication of EP1602153B1 publication Critical patent/EP1602153B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
    • 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
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/34—Conductive members located under head of screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/927—Conductive gasket

Definitions

  • the present invention relates to devices for improving and increasing the conductance of electrical connections and particularly relates to a contact device for improving the service life of electrical connections.
  • the maintenance of the connections requires disassembly to practice a re-surfacing of the areas in contact.
  • the tools used for these re-surfacing are generally rotary grinding machines. They degrade the total flatness of the surfaces in contact which has the effect of limiting areas and points of contact. The contact areas being reduced, the connections then undergo electrical stresses concentrated on these areas and their degradation is even faster.
  • JA-A-530805890n discloses a metal foam spacer for improving the conductivity of the connection in a capacitor. But this element is not suitable in the context of the invention which relates to the case of connections in which continuous currents of high intensity exceeding 1000 A.
  • the first object of the invention is to provide a contact device for electrical connections in order to improve the electrical conductance of these connections and to slow the degradation of the surfaces in contact.
  • Another object of the invention is to provide a contact device for improving the electrical connections in order to increase the electrical performance of these connections when they are in an advanced state of degradation.
  • a third object of the invention is to provide a contact device for improving the electrical connections subjected to currents of high intensity greater than 1000 A, to increase the electrical performance of these connections.
  • the object of the invention is therefore a contact device essentially comprising a conductive element adapted to be interposed between the two contact surfaces of two conductors of an electrical connection.
  • the intermediate conductive element in which circulates a current of an intensity greater than 1000 A is made of silver foam of high porosity and deformability to reduce the electrical resistance of the connection. It also includes minus a peripheral seal creating a seal-proof barrier to external degrading agents at the periphery of the intercalating conductive element.
  • the intermediate conductive element used in the device according to the invention is a metal foam 10 preferably manufactured according to the method described in the patent application.
  • WO 02/059396 it being understood that the device according to the invention is not limited to metal foams obtained by the process described in this document.
  • the metal foam is preferably a copper foam. Its structure is alveolar and its physical properties are mainly a high porosity and deformability and a low density of the order of 400g / m 2 . In comparison, the density of a copper sheet of the same thickness is of the order of 15 kg / m 2 .
  • the honeycomb structure of the copper foam is such that it consists for the most part of vacuum.
  • its surface comprises a multitude of contact points 11 of the order of one micron, the number of which reaches 30 points per mm 2 .
  • the thickness of the copper foam is of the order of 2 mm.
  • this copper foam constituting the intermediate conductive element according to the invention is cut to the size of the contact surface of the electrical connection described in FIG. figure 2 and has an opening 18 for the passage of the clamping bolt.
  • the copper foam thus cut has two peripheral sealing seals 14 and 16.
  • Peripheral seals 14 and 16 may be made in different ways. They may be impregnated in the foam or made by the removal of an elastomeric sealant on the periphery. But it is also possible to make joints by folding the edges of the foam plate at least once on itself or by rolling the edges of the foam plate.
  • FIGs 2a and 2b represent an electrical connection according to the invention.
  • the conductors 21 and 23 are located on either side of the copper foam 10 so that their surfaces 22 and 24 come into contact with the copper foam.
  • the copper foam is an intermediate element between the two conductors of the electrical connection.
  • the electrical connection between the conductors 21 and 23 is made by close contact by means of a clamping means such as a clamping bolt 25 passing through the two conductors through a hole provided for this purpose and through the opening 18 of the foam of copper 10.
  • the device according to the invention can be used for a contact of a new electrical connection.
  • it improves the homogeneity of the passage of the current through the surface in contact.
  • the contact is even more important that it is located near the clamping means or clamping bolt 25. Therefore, the resistance and therefore the electrical losses of the electrical connection consisting of the conductors 21 and 23 in contact is minimal near the clamping means .25 and increases more away from it.
  • This inhomogeneous distribution of the current favors a zone of higher current concentration and therefore a zone more solicited and therefore degraded-more-quickly.
  • the provision of the intermediate conductive element made of copper foam increases the points of contact between the two conductors 21 and 23 and thus allows a homogeneous distribution of the current over the entire contact surface. Thanks to this homogeneous distribution, there are no areas of concentration of current so no areas more solicited and conducive to a faster degradation.
  • the device according to the invention can also be advantageously used for a contact of a degraded or deformed electrical connection.
  • the conductors and the electrical connections are subjected to currents of high intensity and high temperatures.
  • the wear of the connections is concretized mainly by a deformation of the contact surfaces of the electrical connections. This results in significant electrical losses of up to several KW per connection and variations in the flow of current through these contacting surfaces.
  • the re-machining of deformed contact surfaces is no longer necessary thanks to the contribution of copper foam. There is thus obtained a significant improvement in the electrical connections having degraded and deformed contact surfaces 22 and 24, even in the case of deformations of the order of one millimeter.
  • the deformability of the copper foam allows the whole of the foam 10 to marry the degraded contours of the surfaces in contact 22 and 24, as described on the enlargement of the figure 2b and thus to increase the contact area and distribute the pressure exerted through the clamping means 25.
  • the tips 11 on the surface of the copper foam multiply the points of contact. This results in improved current flow conditions by reducing electrical losses.
  • the tips 11 on the surface of the copper foam also pierce the oxide layers that appear on the surface of the metals and therefore the conductors 21 and 23, such as copper oxide or alumina for example. 'aluminum. These layers have an insulating effect and act as resistors and therefore induce electrical losses.
  • the device according to the invention makes it possible to improve the electrical conductance of a used connection even without first cleaning it.
  • the peripheral seal 14 and 16 makes it possible to reduce the penetration of degrading external agents into the connection by creating a sealed barrier at the periphery of the connection.
  • the degrading agents are generally liquids such as sodium hydroxide or washing water or any other pollutant product transported by water.
  • Copper foam can be improved by removing a product that improves heat transfer and electrical conductivity.
  • the use of a silver-plated copper foam as an intermediate conductive element improves the efficiency of the device according to the invention.
  • the potential drop of a connection of 1 dm 2 formed of two copper conductors is of the order of 50 mV for a current of an intensity of 5000 A.
  • the potential drop decreases to 26 mV and with a silver copper foam, the potential drop is only 5 mV for identical temperature and pressure conditions in all three cases.
  • the silver is deposited on the copper foam by a conventional electrochemical process or under vacuum.
  • the device according to the invention is all the more advantageous, it sees its efficiency increase with temperature. Indeed, the potential drop of a 1 dm 2 connection using the device according to the invention with a silver copper foam is of the order of a few mV for a current of an intensity of 5000 A and the temperature of 300 ° C. This feature is due to the fact that the tips 11 of the metal foam (copper, silver copper or silver) are soldered under the effect of temperature to the conductors 21 and 23 with which they are in contact.
  • metal foam is preferably used for the practice of the invention, any other conductive foam composed of one or more materials could be used.
  • the device according to the invention has many other advantages. Its implementation is fast, easy and clean. It is particularly advantageous for improving the conductance of copper / copper electrical connections but also for connections between two different electrical conductors such as aluminum / copper or steel / aluminum or steel / copper pairs.
  • the device according to the present invention makes it possible to slow down the degradation of the surface state of the electrical connections subjected to currents of high intensity.
  • the use of the copper foam according to the invention is also conceivable to improve the thermal conductance of contact and thus avoid thermal losses due to the passage of heat from one material to another.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Push-Button Switches (AREA)
  • Non-Insulated Conductors (AREA)
EP03786039A 2002-11-20 2003-11-20 Materiaux de mousse metallique pour contact des connexions electriques Expired - Lifetime EP1602153B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0214528A FR2847391A1 (fr) 2002-11-20 2002-11-20 Dispositif de contact pour ameliorer la duree de vie des connexions electriques
FR0214528 2002-11-20
PCT/FR2003/003440 WO2004049515A1 (fr) 2002-11-20 2003-11-20 Dispositif de contact pour ameliorer la duree de vie des connexions electriques

Publications (2)

Publication Number Publication Date
EP1602153A1 EP1602153A1 (fr) 2005-12-07
EP1602153B1 true EP1602153B1 (fr) 2009-06-10

Family

ID=32187770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03786039A Expired - Lifetime EP1602153B1 (fr) 2002-11-20 2003-11-20 Materiaux de mousse metallique pour contact des connexions electriques

Country Status (10)

Country Link
US (1) US7229296B2 (zh)
EP (1) EP1602153B1 (zh)
JP (1) JP2006506796A (zh)
CN (1) CN100468875C (zh)
AT (1) ATE433609T1 (zh)
AU (1) AU2003295045A1 (zh)
CA (1) CA2506788C (zh)
DE (1) DE60327951D1 (zh)
FR (1) FR2847391A1 (zh)
WO (1) WO2004049515A1 (zh)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5463742B2 (ja) * 2009-06-10 2014-04-09 三菱電機株式会社 接続装置ならびにこれを用いた配電盤
FR2952377B1 (fr) * 2009-11-09 2012-05-04 Amc Holding Dispositif de contact pour ameliorer la dissipation thermique des appareils generateurs de chaleur
FR2962856B1 (fr) * 2010-07-16 2012-08-17 Amc Holding Dispositif de connexion electrique a conductance amelioree
FR2996348B1 (fr) * 2012-10-03 2015-05-15 Amc Holding Poudre et pate pour ameliorer la conductance des connexions electriques
FR2997788B1 (fr) 2012-11-05 2016-01-22 Amc Etec Dispositif de sectionnement d'une ligne d'alimentation electrique a courant de haute intensite
CN203232920U (zh) * 2012-12-25 2013-10-09 华广生技股份有限公司 电池导电片及具有可活动式电池导电片的电子装置
US9847521B2 (en) 2012-12-25 2017-12-19 Bionime Corporation Conductive plate and an electronic device having the same
CN105261844A (zh) * 2015-11-11 2016-01-20 何亮 一种平面导体连接处的填充件
CN106099405A (zh) * 2016-06-01 2016-11-09 国网辽宁省电力有限公司葫芦岛供电公司 一种电力设备线夹连接用铜铝复合介质膜填充方法
CN105977654A (zh) * 2016-06-01 2016-09-28 国网辽宁省电力有限公司葫芦岛供电公司 一种电力设备线夹连接用铝质介质膜填充方法
CN105932510A (zh) * 2016-06-01 2016-09-07 国网辽宁省电力有限公司葫芦岛供电公司 一种电力设备线夹连接用铜质介质膜填充方法
CN105932436A (zh) * 2016-06-01 2016-09-07 国网辽宁省电力有限公司葫芦岛供电公司 一种电力设备线夹连接用锡介质膜填充方法
FR3073677B1 (fr) * 2017-11-13 2019-10-11 A M C Dispositif de contact adapte pour faciliter la reparation des connexions electriques boulonnees
CN111987488A (zh) * 2019-05-23 2020-11-24 广州华嘉电力科技有限公司 电力设备接头自我愈合的连接装置及方法
DE102020128939A1 (de) 2020-11-03 2022-05-05 TenneT TSO GmbH Hochspannungskontakt für eine für geometrische Imperfektionen tolerante Hochspannungsverbindung

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Publication number Priority date Publication date Assignee Title
US3539973A (en) * 1968-02-12 1970-11-10 Hughes Aircraft Co Electrical connector
JPS5380589A (en) * 1976-12-24 1978-07-17 Hitachi Ltd Connecting method for electric conductor
US4923739A (en) * 1987-07-30 1990-05-08 American Telephone And Telegraph Company Composite electrical interconnection medium comprising a conductive network, and article, assembly, and method
US5153818A (en) * 1990-04-20 1992-10-06 Rohm Co., Ltd. Ic memory card with an anisotropic conductive rubber interconnector
DE59206955D1 (de) * 1992-05-08 1996-09-26 Multi Contact Ag Kontaktvorrichtung
US6114645A (en) * 1995-04-27 2000-09-05 Burgess; Lester E. Pressure activated switching device
US5857858A (en) * 1996-12-23 1999-01-12 General Electric Company Demountable and repairable low pitch interconnect for stacked multichip modules
US6309742B1 (en) * 2000-01-28 2001-10-30 Gore Enterprise Holdings, Inc. EMI/RFI shielding gasket
LU90721B1 (en) * 2001-01-25 2002-07-26 Circuit Foil Luxembourg Trading Sarl Method for producing metal foams and furnace for producing same

Also Published As

Publication number Publication date
EP1602153A1 (fr) 2005-12-07
JP2006506796A (ja) 2006-02-23
WO2004049515A1 (fr) 2004-06-10
AU2003295045A1 (en) 2004-06-18
FR2847391A1 (fr) 2004-05-21
CA2506788C (fr) 2012-06-12
US7229296B2 (en) 2007-06-12
CN100468875C (zh) 2009-03-11
CA2506788A1 (fr) 2004-06-10
ATE433609T1 (de) 2009-06-15
CN1714478A (zh) 2005-12-28
DE60327951D1 (de) 2009-07-23
US20060051990A1 (en) 2006-03-09

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