EP1352449B1 - Elektrische kontaktanordnung für fasermaterial und anwendung zur joule-effekt-heizung - Google Patents

Elektrische kontaktanordnung für fasermaterial und anwendung zur joule-effekt-heizung Download PDF

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Publication number
EP1352449B1
EP1352449B1 EP02712001A EP02712001A EP1352449B1 EP 1352449 B1 EP1352449 B1 EP 1352449B1 EP 02712001 A EP02712001 A EP 02712001A EP 02712001 A EP02712001 A EP 02712001A EP 1352449 B1 EP1352449 B1 EP 1352449B1
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EP
European Patent Office
Prior art keywords
electrical contact
fibrous material
contact according
fibrous
adhesive
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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
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EP02712001A
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English (en)
French (fr)
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EP1352449A1 (de
Inventor
Pierre Le Cloirec
Albert Subrenat
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    • 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
    • H01R4/04—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 using electrically conductive adhesives

Definitions

  • the present invention relates to a device for electrical contact between a power supply and a layer of a fibrous flexible conductive material and the use of this device for heating by Joule effect.
  • the document FR 2,588,127 describes a device according to the preamble of claim 1.
  • the layer of conductive material in the case where it would be necessary to give the layer of conductive material a non-planar shape, for example a curved or pleated shape, it is also difficult to obtain a continuous electrical contact over long lengths. This is particularly the case when the said material is used for heating by Joule effect, for which the heating should be as homogeneous as possible, so it is necessary to obtain a distribution of current in the fabric as homogeneous as possible over the entire length of the contact. The resultant of this effect will give a current transmission as homogeneous as possible over the entire surface of the material used between the two electrical contacts.
  • An object of the present invention is therefore to overcome the aforementioned drawbacks by proposing a device for making an effective electrical contact between a direct or alternating current power supply and a layer of a flexible, predominantly fibrous conductive material, without damaging the material. fibrous, nor alter its mechanical strength.
  • Another object of the present invention is to provide a device for producing a quasi-continuous electrical contact zone between said fibrous material and the power supply.
  • the adhesive may consist mainly of an adhesive or resin itself conductive, or an adhesive or resin doped for example with silver, copper, graphite ... or an adhesive or a resin containing electrically conductive (micro) particles.
  • the separate overlapping regions are arranged diametrically opposite, to allow the passage of electric current on all, or at least a major part of the layer of said fibrous material.
  • the total thickness of the device allows its folding at the area covered with the adhesive and the metal ribbon.
  • This folding can be a pleating, a crenellation, a winding of the layer on itself or on a support, or any other shaping that the flexibility of the layer of fibrous material allows.
  • the thickness of the superposition of the metal ribbon and the adhesive layer may be in a wide range from 0.001 mm to 5 mm, and more particularly between 0.05 mm and 2 mm, the fibrous material may have a thickness between 0.1 mm and 10 mm, preferably between 0.4 mm and 5 mm.
  • the intensity of the current delivered is a function of the contact resistance between the metal ribbon and the predominantly fibrous material and also depends on the width of the overlap zone. This width can be between 0.001 mm (ribbon in the form of a thread) and about 500 mm (flat ribbon). It is important when said contact resistance or the resistivity of the conductive adhesive used is large. This width must also be important if it is necessary to have a power delivered in the high fibrous material. However, if the ribbon is in the form of a wire, it is necessary to multiply the number of connections with the power supply.
  • the overlapping zone by its superimposed structure, makes it possible to stiffen the fibrous material and thus the conventional connections to a power supply can be used: metal clips, welds, rivets, screws, etc. without damaging said material.
  • this connection can be in a single point or in a multiplicity of points. A single point is preferred, for technical and economic reasons, the metal strip having the advantage of distributing the current over the entire length of the overlap area.
  • said material is coated with a conductive varnish, at least in said overlap zone.
  • the role of this varnish is mainly to stiffen the contact, improve interfiber contact, and thus reduce the electrical contact resistance while smoothing the surface of the fibrous material.
  • the mechanical and electrical contacts between said fibrous material and the adhesive are improved, and by the same contacts between the fibrous material and the power supply.
  • this device can be embedded in an electrical and / or thermal insulating material.
  • the insulating material is provided with at least one perforation allowing a connection to the power supply, for example by screwing or riveting, electric lug or "banana” type plug, or the device is embedded with its connection in the insulating material.
  • the metal strip has a resistivity approximately between 10 -8 and 10 -4 ⁇ .m, preferably between 10 -7 and 10 -4 ⁇ .m.
  • the resistance of this ribbon must be lower than the contact resistance on the fibrous material.
  • Said ribbon may for example be based on copper, zinc, aluminum, silver, nickel, iron, nickel-chromium, lead, or any other metal suitable for its electrical properties, thermal and mechanical or based on an alloy of these metals.
  • the metal strip may also be replaced by an electrically conductive polymer material.
  • the adhesive and the varnish must have a resistivity generally lower than that of said fibrous material. They may contain for example conductive (micro) particles that provide very many points of contact of very low electrical resistance.
  • Said predominantly fibrous material that can be used in the present invention can be chosen from carbon or activated carbon materials in the form of a fabric, a felt or a fiber agglomerate.
  • Their resistivity is generally of the order of 10 -4 to 10 -1 ⁇ .m.
  • This predominantly fibrous material may be reinforced with a mesh, a grid or a network of another material of non-conductive mechanical reinforcement.
  • Said reinforcing material may for example be polypropylene, cellulosic fibers, glass or quartz fibers.
  • the electrically conductive fibrous material then serves as a heating element, and can be used for example for panels radiants, interior elements of ovens, fireplaces, exhausts, etc.
  • the fibrous material is also an adsorbent material (based on activated carbon for example) and has previously adsorbed molecules (for example organic odor and / or pollutant molecules), the heating thereof allows the departure by desorption of these adsorbed molecules, and thus the regeneration of said material. It is also possible to use the device to simply measure the resistance or electrical resistivity of this type of fibrous material. Another use of the device according to the invention relates to the destocking of fuel molecules previously stored within the fibrous material.
  • the device according to the present invention can also be used for the polarization of a fibrous surface, for example for the electrostatic capture of particles and dust.
  • the fibrous material provided with the device according to the invention can also be used as an electrode in an electrolysis bath.
  • the fibrous material (1) is a carbon fabric (activated or not), here constituted of woven fibers (warp and weft) (2).
  • This material (1) which is electrically conductive (resistivity of the order of 10 -3 ⁇ .m) is covered, on two overlapping zones z 1 and z 2 of width l 1 and l 2 , located at the two opposite ends.
  • this metal strip (4) corresponds to those of the respective covering areas of width l 1 , l 2 and length L 1 , L 2
  • the thickness of the copper strip (4) is in this example about 35 ⁇ m and its width (l 1 l 2 ) of 19 mm, its resistivity is of the order of 1.7 10 -8 ⁇ .m.
  • a metal ribbon / adhesive pair for example, a commercially available metal strip used for shielding connectors and cables against electromagnetic interference, grounding and drainage of electrostatic charges can be used.
  • this metal ribbon / adhesive assembly has the main role of ensuring the transmission of the current between the power supply (5) and the fibrous material (1).
  • the adhesive is an acrylic based glue containing conductive microparticles (6), as shown in section on the figure 2 .
  • the resistivity through this adhesive is of the order of 5.10 -3 ⁇ .m.
  • the device according to the invention can be doubled, that is to say be provided on both sides of the fibrous material (1), as schematically dashed on the figure 2 (adhesive (3 ') and metal ribbon (4')).
  • the overlap areas z 1 and z 2 can be located, always on the opposite ends of the fibrous material (1), one on one side of said material, the other on the other face of the same material, thus allowing a better electrical circulation through this fibrous material.
  • the carbon fabric (1) serves as an adsorbent material (for example if the fibrous material is activated carbon-based fabric or felt) it is advantageous to have the largest possible exchange surface with a minimum space requirement. It may therefore be advantageous for example to wind the said material on itself or to fold or wrinkle.
  • the figure 3 shows such an arrangement by pleating.
  • the fibrous material (1) here having the general shape of a cylinder (7), is folded into a multitude of folds (8) parallel to each other and parallel to the axis (9) of said cylinder (7).
  • the device according to the invention can be placed at the two ends of said cylinder (7), on overlapping zones (z) located either inside or outside the cylinder, or one inside. the other outside, or even inside and outside this cylinder, at each end.
  • connection (10) with the power supply (5) is here realized in a single point, by means of a weld made on the surface of the metal strip (4), at each end of said cylinder (7), of which only an end is represented on the figure 3 .
  • the figure 4 shows a variant of the device according to the invention, where the superposition of a fibrous material (1), sandwiched between two conductive adhesive couples (3) / metal ribbon (4), is embedded in a insulating material (11) both electrical and thermal, which is for example an epoxy resin.
  • FIG. 5a and 5b present two examples of connection.
  • the cable (12) of the power supply which is directly connected to one of the metal strips (4), by means of a soldering of the wires (13) of said cable, after having removed the insulating sheath ( 14).
  • a conductive element (15) is welded to one of the metal strips (4) before being embedded in the insulating material (11).
  • This element (15) has a female part (16) which communicates with the outside of the block of insulating material (11) and makes it possible to receive a "banana” type plug (not shown), a cable connected to the power supply.
  • the fibrous material (1) which is generally flexible and very flexible, can be reinforced by bonding with a mechanically stronger material (18). Such a variant is presented at figure 6 , or the colaminate portion (19) is disposed opposite the covering area by the adhesive (3) and the metal strip (4) of the device according to the invention, with respect to the fibrous material (1).
  • the device according to the present invention can also serve as an electrical contact between two identical or different fibrous material modules (1a and 1b).
  • An example is shown schematically in the figure 7 .
  • the two fibrous materials (1a and 1b) are provided at their adjacent ends with a device according to the invention (respective couples conductive adhesive (3a, 3b) (not shown) / metal tape (4a, 4b)) between which is fixed , by gluing also by means of a conductive adhesive (not shown), an additional device comprising at least one (preferably two) metal ribbon (4c).
  • a device according to the invention couples conductive adhesive (3a, 3b) (not shown) / metal tape (4a, 4b) between which is fixed , by gluing also by means of a conductive adhesive (not shown), an additional device comprising at least one (preferably two) metal ribbon (4c).
  • Such an arrangement is used, for example, for placing Joule heating modules in series for the desorption of molecules previously adsorbed on activated carbon fabrics or felts.

Landscapes

  • Resistance Heating (AREA)
  • Laminated Bodies (AREA)
  • Central Heating Systems (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Cleaning In General (AREA)
  • Multicomponent Fibers (AREA)
  • Inorganic Fibers (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Surface Heating Bodies (AREA)

Claims (18)

  1. Anordnung mit einer Schicht aus einem elektrisch leitfähigen vorwiegend fiberförmigen flexiblen Material (1) für einen elektrischen Kontakt zwischen einer Stromversorgung (5) und dem flexiblen Material (1), dadurch gekennzeichnet, dass das Material (1) auf wenigstens zwei getrennten Abdeckzonen (z1, z2) von einer elektrisch leitfähigen Klebstoffschicht (3) und einem Metallband (4) abgedeckt ist.
  2. Elektrische Kontaktanordnung nach Anspruch 1, dadurch gekennzeichnet, dass deren Gesamtdicke auf der Höhe der mit Klebstoff (3) und Metallband (4) abgedeckten Zonen (z1, z2) deren Faltenbildung ermöglicht.
  3. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens in der Abdeckzone (z1, z2) das Material (1) zwischen dem vorwiegend fiberförmigen Material (1) und der Klebestoffschicht (3) mit einem leitfähigen Lacks (17) beschichtet ist.
  4. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Metallband (4) einen spezifischen Widerstand zwischen ungefähr 10-8 und 10-4 Ω.m, vorzugsweise zwischen 10-7 und 10-4 Ω.m aufweist.
  5. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Metallband (4) aus einem Material auf der Basis von Kupfer, Zink, Aluminium, Silber, Nickel, Chrom, Eisen, Blei oder einer Legierung dieser Metalle besteht.
  6. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass diese in ein elektrisch und/oder thermisch isolierendes Material (11) eingebettet ist.
  7. Elektrische Kontaktanordnung nach Anspruch 6, dadurch gekennzeichnet, dass das isolierende Material (11) zumindest mit einem Durchbruch versehen ist, der einen Anschluss an die Stromversorgung (5) mittels Verschraubung oder Vernietung ermöglicht.
  8. Elektrische Kontaktanordnung nach Anspruch 6, dadurch gekennzeichnet, dass sie mit ihrem Anschlussstück in das isolierende Material (11) eingebettet ist.
  9. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das vorwiegend fiberförmige Material (1) mit einem Netz, einem Gitter oder einem Netzwerk aus einem anderen nicht leitfähigen mechanischen Verstärkungsmaterial (18) versehen sein kann.
  10. Elektrische Kontaktanordnung nach Anspruch 9, dadurch gekennzeichnet, dass das Verstärkungsmaterial (18) aus Polypropylen, Cellulosefibern, Glasfasern oder Quarzfasern besteht.
  11. Elektrische Kontaktanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das vorwiegend fiberförmige Material (1) aus Gewebe, Filz oder einem Fiberagglomerat (2), aus Kohlenstoff oder Aktivkohle auszuwählen ist.
  12. Anwendung der Anordnung nach einem der vorstehenden Ansprüche für die elektrische Erwärmung eines vorwiegend fiberförmigen Materials durch den jouleschen Effekt.
  13. Anwendung nach Anspruch 12 für strahlende Platten.
  14. Anwendung nach Anspruch 12 für Innenteile von Öfen, Kaminen oder Auspufftöpfen.
  15. Anwendung nach Anspruch 12 für die Regeneration des fiberförmigen Materials (1).
  16. Anwendung nach Anspruch 12 für den Abbau von zuvor in das Innerste des fiberförmigen Materials eingelagerter brennbarer Moleküle.
  17. Anwendung der Anordnung nach einem der Ansprüche 1 bis 11 für die Polarisation einer fiberförmigen Oberfläche.
  18. Anwendung der Anordnung gemäß einem der Ansprüche 1 bis 11 für ein fiberförmiges Material, welches als Elektrode in einem Elektrolysebad dient.
EP02712001A 2001-01-19 2002-01-18 Elektrische kontaktanordnung für fasermaterial und anwendung zur joule-effekt-heizung Expired - Lifetime EP1352449B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0100752 2001-01-19
FR0100752A FR2819942B1 (fr) 2001-01-19 2001-01-19 Dispositif pour contact electrique pour materiaux fibreux et son uitilisation pour le chauffage par effet joule
PCT/FR2002/000196 WO2002058194A1 (fr) 2001-01-19 2002-01-18 Dispositif pour contact electrique pour materiau fibreux et son utilisation pour le chauffage par effet joule

Publications (2)

Publication Number Publication Date
EP1352449A1 EP1352449A1 (de) 2003-10-15
EP1352449B1 true EP1352449B1 (de) 2009-10-21

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EP02712001A Expired - Lifetime EP1352449B1 (de) 2001-01-19 2002-01-18 Elektrische kontaktanordnung für fasermaterial und anwendung zur joule-effekt-heizung

Country Status (9)

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US (1) US6891107B2 (de)
EP (1) EP1352449B1 (de)
JP (1) JP2004523861A (de)
AT (1) ATE446597T1 (de)
BR (1) BR0206287A (de)
CA (1) CA2434598C (de)
DE (1) DE60234080D1 (de)
FR (1) FR2819942B1 (de)
WO (1) WO2002058194A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7840272B2 (en) 2005-06-03 2010-11-23 Medrelief Inc. Methods for modulating osteochondral development using bioelectrical stimulation
CN107920751B (zh) * 2015-09-04 2020-09-22 国立研究开发法人科学技术振兴机构 连接器基板、传感器系统以及可穿戴的传感器系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU502325B2 (en) * 1975-07-29 1979-07-19 Zirconal Processes Ltd. The modular construction of furnaces
US4442139A (en) * 1979-12-11 1984-04-10 Raychem Corporation Elements comprising fibrous materials
US4367585A (en) * 1979-12-26 1983-01-11 Western Electric Company, Inc. Methods for the termination and connectorization of multi-conductor flat cable
US4918814A (en) * 1984-12-20 1990-04-24 Redmond John P Process of making a layered elastomeric connector
US4660908A (en) * 1985-08-05 1987-04-28 Ameron, Inc. Grounding saddle
FR2588127A1 (fr) * 1985-10-02 1987-04-03 Pernot Roger Gant de mise a la masse
US4733059A (en) * 1987-06-15 1988-03-22 Thermon Manufacturing Company Elongated parallel, constant wattage heating cable
DE9013380U1 (de) * 1990-09-21 1990-11-29 SEKURIT SAINT-GOBAIN Deutschland GmbH & Co. KG, 52066 Aachen Stromanschlußelement für eine heizbare Autoglasscheibe
FR2692426B1 (fr) * 1992-06-11 1994-08-26 Seb Sa Plaque chauffante pour récipient chauffant, notamment pour bouilloire.
US6734363B1 (en) * 1992-07-07 2004-05-11 International Business Machines Corporation Lightweight electronic equipment conductor with coolant permeable support
US6080267A (en) * 1994-04-26 2000-06-27 Lithium Technology Corporation Method of electroconductive fastening of current collectors and terminals in electrochemical devices
US6414286B2 (en) * 1999-04-22 2002-07-02 Malden Mills Industries, Inc. Electric heating/warming fibrous articles

Also Published As

Publication number Publication date
DE60234080D1 (de) 2009-12-03
FR2819942A1 (fr) 2002-07-26
CA2434598C (fr) 2010-12-21
JP2004523861A (ja) 2004-08-05
US6891107B2 (en) 2005-05-10
BR0206287A (pt) 2004-01-13
WO2002058194A1 (fr) 2002-07-25
CA2434598A1 (fr) 2002-07-25
EP1352449A1 (de) 2003-10-15
US20040053518A1 (en) 2004-03-18
ATE446597T1 (de) 2009-11-15
FR2819942B1 (fr) 2003-05-30

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