EP3123818B1 - Câble de chauffage électrique hybride - Google Patents

Câble de chauffage électrique hybride Download PDF

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Publication number
EP3123818B1
EP3123818B1 EP15707657.1A EP15707657A EP3123818B1 EP 3123818 B1 EP3123818 B1 EP 3123818B1 EP 15707657 A EP15707657 A EP 15707657A EP 3123818 B1 EP3123818 B1 EP 3123818B1
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EP
European Patent Office
Prior art keywords
filaments
metal filaments
heating cable
metal
electrical
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EP15707657.1A
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German (de)
English (en)
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EP3123818A1 (fr
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Tom Verhaeghe
Filip Lanckmans
Steve Verstraeten
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Bekaert NV SA
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Bekaert NV SA
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Priority to PL15707657T priority Critical patent/PL3123818T3/pl
Priority to RS20191644A priority patent/RS59829B1/sr
Publication of EP3123818A1 publication Critical patent/EP3123818A1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables

Definitions

  • the invention relates to the field of electrical heating cables that comprise metal filaments that act as heat generators when electrical current is sent through the cable.
  • Electrical heating cables comprising metal filaments are known. Important parameter for the heating cable is its electrical resistance in ohm/meter length of the cable, as it determines heat generation. Depending on the application, specific values for the electrical resistance in ohm/meter length of the cable are required.
  • the flex fatigue resistance (or flex life) of the heating cable is important.
  • a number of patent documents relate to heating cables with high flex fatigue, e.g. realized by means of appropriate selection of the metal filaments used in the heating cable.
  • EP1337129 discloses an electrical heating element for heating units of seats and steering wheels.
  • the heating element comprises at least one conductor having at least one core-coated wire.
  • the coating comprises steel and the core comprises copper or a copper alloy, or the coating comprises copper or a copper alloy and the core comprises steel.
  • Hybrid electrical heating cables comprising a number of metal filaments of different types are known as well.
  • EP1705957 discloses a heating cable for car seat heating applications that has high flex fatigue properties.
  • the heating cable has outer strands wound around an inner strand that is electrically conductive.
  • the specific conductivity of the inner strand is smaller than the specific conductivity of the outer strands.
  • the inner strand is made of a material having high tensile strength and/or high alternating bending strength than a material from which the outer strands are made.
  • the inner strands can e.g. be made out of stainless steel filaments and the outer strands out of copper filaments.
  • DE10137976A1 discloses a heating cable for car seat heating.
  • the heating cable comprises a combination of several types of individual wires braided together.
  • the individual types of the individual wires have different electrical properties for setting desired electrical characteristics of the heating cable. At least some of the types of individual wires differ in terms of specific electrical resistance.
  • the combination of copper (or copper alloy) wires and aluminium (or aluminium alloy) wires is specifically favoured.
  • WO2012/136418A1 discloses a heating cable comprising between seven and two hundred metallic monofilaments of a first type.
  • the metallic monofilaments of a first type have a diameter ranging from 30 ⁇ m to 100 ⁇ m.
  • the metallic monofilaments of a first type have a substantially round cross section.
  • the metallic monofilaments of a first type comprise a steel layer with a chromium content of less than 10% by weight.
  • the heating cable has an electrical resistance ranging between 0.1 Ohm/m and 20 Ohm/m when measured at 20°C.
  • a preferred heating cable comprises a metallic monofilament of a second type or one or more bundles of metallic monofilaments of a second type; wherein the second type differs in composition from the first type.
  • DE19638372 discloses a lead wire for a sensor having a conductor unit including at least stainless steel wires and copper wires.
  • a conductor unit including at least stainless steel wires and copper wires.
  • Copper wires or copper filaments for heating wires is not always recommended, as copper has a too high conductivity, leading to a high conductivity of the heating cable. Therefore, when heating cables are required of lower conductivity, the use of copper wires or copper filaments is not recommended. Copper wires and copper filaments have low flex fatigue properties.
  • Electrical heating cables can be connected by means of crimp connectors.
  • a crimp connector can be used to connect the heating cable to another cable, e.g. the cable supplying the electrical current.
  • Such a crimped connection of a heating cable and a supply cable is e.g. described in DE202004018709U1 and in US3324441 .
  • the heating cable can be crimped alone in the crimp connector and the electrical connection is realized e.g. by means of a plug or pin of the crimp connector.
  • the primary object of the invention is to provide a heating cable that has excellent flex fatigue properties and that can be easily and reliably connected by means of a mechanical crimp connection.
  • an electrical heating cable comprises two or more strands of metal filaments twisted or cabled together. At least one, preferably at least two, and more preferably each of the strands, comprises a first set of metal filaments and a second set of metal filaments, both sets of metal filaments for conducting electrical current and generating heat when the heating cable is in use.
  • the metal filaments of the first set of metal filaments comprise a steel layer.
  • the metal filaments of the second set comprise a steel layer.
  • the metal filaments of the second set have an annealed microstructure, involving that the steel layer of the metal filaments of the second set has an annealed microstructure.
  • the metal filaments of the first set have an end-drawn microstructure.
  • a strand is defined as a combination of filaments that are parallel to each and/or are twisted together, whereby untwisting of the strand results in parallel filaments.
  • the first set of metal filaments and the second set of metal filaments will conduct electricity and contribute to the heat generation when the heating cable is in use.
  • the heating cable of the invention has excellent flex fatigue resistance. It can be crimped easily and reliably, with all metal filaments being properly crimped. This is a consequence of the presence of the metal filaments of the second set that have an annealed microstructure. The metal filaments of the second set are compressed during crimping, ensuring good electrical contact between the metal filaments of the crimped connection. Quality control of the crimp connections shows that a proper crimp connection is made.
  • An additional benefit is that the contact resistance of the crimped connection is lower, certainly compared to similar crimp connections of other prior art heating cables with high flex fatigue. A low contact resistance is beneficial as it avoids overheating of the crimp connection due to heat generation at the crimp connector when the electrical heating cable is in use.
  • metal filaments of two different types in one strand puts an additional burden to the production of the strands.
  • metal filaments of two different types have to be provided, e.g. unwound from their respective spools, kept under appropriate tension and processed. Such processing is more difficult - due to their differing mechanical properties - compared to the processing of only one type of metal filaments.
  • the specific electrical resistance of the metal filaments of the second set is higher than the specific electrical resistance of the metal filaments of the first set.
  • the equivalent diameter of the metal filaments of the first set differs at maximum 20%, preferably at maximum 10%, and more preferably at maximum 5%, from the equivalent diameter of the metal filaments of the second set.
  • the equivalent diameter is the diameter of a circle with the same surface area as the cross section of the metal filament which is not necessarily round.
  • the filaments of the first set of metal filaments and the filaments of the second set of metal filaments are combined in the strand via twisting, wrapping, or cabling.
  • the first set of filaments comprises between 5 and 150 filaments. More preferably more than 5, e.g. more than 10, e.g. more than 20, e.g. more than 30, e.g. more than 50, e.g. more than 70, e.g. more than 90, e.g. more than 100. More preferably less than 150, e.g. less than 125, e.g. less than 100, e.g. less than 80, e.g. less than 65, e.g. less than 50.
  • a preferred hybrid electrical heating cable has an electrical resistance in the range of 0.1 - 5 Ohm/m, more preferably in the range of 0.1 - 3 Ohm/m.
  • filament diameters between 35 ⁇ m and 100 ⁇ m, more preferably between 50 ⁇ m and 80 ⁇ m.
  • the heating cable can have a corrosion resistant sheath.
  • the corrosion resistant sheath can comprise a polymer layer. Preferred polymer layers comprise fluorine in the polymer, resulting in superior corrosion resistance and high temperature resistance. Further preferred, the corrosion resistant sheath of the heating cable comprises perfluoroalcoxy (PFA), FEP (fluorinated ethylene propylene), TPE-C, PPS (polyphenylene sulfide) or MFA (perfluoromethylalcoxy).
  • PFA perfluoroalcoxy
  • FEP fluorinated ethylene propylene
  • TPE-C polyethylene propylene
  • PPS polyphenylene sulfide
  • MFA perfluoromethylalcoxy
  • the metal filaments of the first set of metal filaments and the metal filaments of the second set of metal filaments are intermingled.
  • the metal filaments of the first set and the metal filaments of the second set are intermingled is meant that the metal filaments of the first set of metal filaments are distributed in the strand in between metal filaments of the second set of metal filaments, and the metal filaments of the second set of metal filaments are distributed in the strand in between metal filaments of the first set of metal filaments.
  • the metal filaments of the first set of metal filaments have an end-drawn microstructure. This has shown to provide excellent crimping in a crimp connector.
  • the cumulated cross sections of metal filaments of the second set is at least 25%, more preferably at least 30%, and even more preferably at least 40 % - and preferably less than 70% - of the combined cumulated cross sections of metal filaments of the first and second set.
  • the specific electrical resistance, expressed in ohm*mm 2 /m, of the metal filaments of the second set is at least 2 times, and more preferably at least 3 times, more preferably at least 3 times, and more preferably at least 10 times higher than the specific electrical resistance of the metal filaments of the first set.
  • An exemplary metal filament out of high carbon steel with a coating layer out of zinc has a specific electrical resistance of 0.202 ohm*mm 2 /m.
  • An exemplary metal filament out of low carbon steel with a coating layer out of zinc has a specific electrical resistance of 0.110 ohm*mm 2 /m.
  • An exemplary metal filament out of low carbon steel with a coating layer out of tin has a specific electrical resistance of 0.124 ohm*mm 2 /m.
  • a stainless steel filament has a specific electrical resistance of 0.682 ohm*mm 2 /m.
  • An exemplary metal filament comprising a low carbon steel core and a copper cladding has a specific electrical resistance of 0.043 ohm*mm 2 /m.
  • An exemplary metal filament comprising a copper core and a stainless steel cladding has a specific electrical resistance of 0.046 ohm*mm 2 /m.
  • the electrical conductivity of the heating cable is for more than 75%, preferably for more than 85%, determined by the electrical conductivity of the metal filaments of the first set.
  • the steel layer of the metal filaments of the first set of metal filaments is a low carbon or a high carbon steel layer, preferably comprising a corrosion resistant metal layer (e.g. zinc or nickel) around the low carbon or high carbon steel layer.
  • a corrosion resistant metal layer e.g. zinc or nickel
  • the metal filaments of the first set of metal filaments comprise a layer of a metal or metal alloy of specific electrical conductivity higher than the specific electrical conductivity of the steel layer of the metal filaments of the first set of metal filaments.
  • the steel layer of the filaments of the first set of metal filaments is a stainless steel layer or a low carbon steel layer.
  • the layer of a metal or metal alloy of specific electrical conductivity higher than the specific electrical conductivity of the steel layer is concentric with the steel layer.
  • the layer of a metal or metal alloy of specific electrical conductivity higher than the specific electrical conductivity of the steel layer can be a copper layer or a copper alloy layer.
  • the metal filaments of the first set of metal filaments can comprise a copper or copper alloy core and a - preferably circumferential - stainless steel layer around it.
  • such metal filaments have an end-drawn microstructure.
  • metal filaments of the first set is metal filaments comprising a steel core (e.g. a low carbon steel core) and a - preferably circumferential - layer of copper or of a copper alloy around it.
  • a steel core e.g. a low carbon steel core
  • a - preferably circumferential - layer of copper or of a copper alloy around it Such filaments are known as copper cladded steel filaments.
  • these metal filaments have an end-drawn microstructure.
  • the metal filaments of the second set of metal filaments are stainless steel filaments, e.g. with polygonal cross section shape, e.g. bundle drawn, or e.g. with substantially circular cross section, e.g. single end drawn.
  • the steel layer of the metal filaments of the second set of metal filaments is a low carbon or a high carbon steel layer, preferably comprising a corrosion resistant metal layer around the low carbon or high carbon steel layer.
  • high carbon steel is meant a steel grade with carbon content between 0.30 and 1.70% by weight and a chromium content of less than 10% by weight.
  • high carbon steel grades with carbon content between 0.40 and 0.95% by weight are used, even more preferably high carbon steel grades with carbon content between 0.55% and 0.85% by weight.
  • the high carbon steel grades can contain alloy elements; but for the invention, the high carbon steel grades preferably have a chromium content of less than 2.5% by weight and a nickel content of less than 1% by weight, preferably a nickel content of less than 0.1 % by weight, even more preferably a nickel content of less than 0.05% by weight. And preferably a chromium content of less than 1% by weight.
  • the use of a high carbon steel grade has a number of additional benefits.
  • the strength of metal filaments comprising a high carbon steel layer is high, especially if the metal filament has an end-drawn microstructure. The result is that heating cables comprising such filaments have a high strength and a high flex life.
  • a steel alloy where - possibly with exception for silicon and manganese - all the elements have a content of less than 0.50 % by weight, e.g. less than 0.20 % by weight, e.g. less than 0.10 % by weight.
  • E.g. silicon is present in amounts of maximum 1.0 % by weight, e.g. maximum 0.50 % by weight, e.g. 0.30 % by weight or 0.15 % by weight.
  • E.g. manganese is present in amounts of maximum 2.0 % by weight, e.g. maximum 1.0 % by weight, e.g. 0.50 % weight or 0.30 % by weight.
  • the carbon content ranges up to 0.20 % by weight, e.g. ranging up to 0.06 % by weight.
  • the minimum carbon content can be about 0.02 % by weight. In a more preferred embodiment, the minimum carbon content can be about 0.01 % by weight.
  • the low carbon steel composition has mainly a ferrite or pearlite matrix and is mainly single phase. There are no martensitic phases, bainite phases or cementite phases in the ferrite or pearlite matrix.
  • low carbon or high carbon filaments are preferably provided with a corrosion resistant coating layer.
  • the corrosion resistant coating layer can e.g. be selected from the group consisting of zinc, tin, silver, nickel, aluminum, or an alloy thereof.
  • the corrosion resistant metal coating is between 1 and 10 % by weight of the metal filament. More preferably, between 2 and 6 % by weight. Even more preferably between 3 and 5 % by weight.
  • As the metal coating layer is low in weight percentage of the metal filament it is not affecting the electrical resistance of the filament to a significant extent.
  • the benefit of the metal corrosion resistant coating on the steel filament is that the steel filaments are better resisting staining and corrosion. This is of interest for the production process of the heating cable of the invention and for storage of half-products during the production process, but also during installation and use of the heating cable.
  • a nickel coating on steel filaments is the use of a nickel coating on steel filaments; the coating layer being between 2 and 6% by weight of the steel filament. More preferably the nickel coating is between 3 and 5% by weight of the steel filament. Specific examples for a nickel coating layer are on a steel filament comprising low carbon steel or comprising high carbon steel.
  • a zinc coating on a steel filament is use of a zinc coating on a steel filament; the coating layer being between 0.5 and 5% by weight of the steel filament. More preferably the zinc coating is between 1.5 and 2.5% by weight of the steel filament.
  • a zinc coating layer are on a steel filament comprising low carbon steel or comprising high carbon steel.
  • the metal filaments of the second set of metal filaments have been produced by means of single end drawing.
  • a second aspect of the invention is an assembly of a hybrid electrical heating cable as in the first aspect of the invention and a crimp connector, wherein the hybrid electrical heating cable is crimped in the crimp connector.
  • the crimp connector is connectable to an electrical power supply without overlap of an end portion of the heating cable with an end portion of an electrical power supply cable, preferably via an alternative connection than a crimp connection, e.g. via a pin or plug connector.
  • a preferred assembly comprises an electrical power supply wherein the crimp connector is connected to the electrical power supply without overlap of an end portion of the heating cable with an end portion of an electrical power supply cable, preferably via an alternative connection than a crimp connection, e.g. via a pin or plug connector.
  • a preferred assembly comprises an electrical power supply wherein the crimp connection is connected to the electrical power supply with an overlap of an end portion of the heating cable with an end portion of an electrical power supply cable in the crimp connector.
  • Such an electrical power supply cable can advantageously comprise copper filaments.
  • Crimping can be performed in a way that two crimps take place simultaneously, the cable crimp and (if an insulation is present) the insulation crimp.
  • the wire crimp forms the mechanical-electrical connection between the heating cable and the terminal (crimp connector).
  • the connection must be gastight, meaning that there should be no voids between the filaments of the heating cable and the terminal (crimp connector) as corrosion could occur through such voids.
  • crimps exist and can be used for the invention. Examples are B-crimp and O-crimp, wherein the name of the crimp is derived from the shape of the crimp.
  • the hybrid heating cable of the invention can e.g. be used in car seat heating systems and in industrial heating systems
  • Figure 1 shows an example of a heating cable according to the invention.
  • Figures 2 and 3 show examples of crimp connections comprising a heating cable of the invention.
  • Figure 1 shows an example of a heating cable 105 according to the invention.
  • a strand 110 of 7 metal filaments has been twisted in a first twisting operation.
  • 10 of such twisted strands 110 have been twisted together into a cable with an outer diameter of 1.60 mm.
  • the cable is extrusion coated with a PFA coating layer 120, e.g. with a wall thickness of 0.22 mm.
  • the strand 110 of 7 metal filaments comprises a first set of metal filaments, wherein the set consists out of two metal filaments 130 that have a copper core (36 % by weight of the metal filament) and a stainless steel layer (64 % by weight of the metal layer), e.g. AlSl 316L.
  • the stainless steel layer has a substantially constant thickness over the full circumference of the metal filament.
  • the strand 110 of 7 metal filaments comprises a second set of metal filaments, wherein the set consists out of five metal filaments 140 which are single end drawn stainless steel filaments (e.g. AlSl 316L).
  • the metal filaments of the first set 130 and the metal filaments of the second set 140 each have a diameter of 75 ⁇ m.
  • the metal filaments of the first set 130 and of the second set 140 had been randomly distributed in the strand 110, resulting in an intimate blend in the strand 110 (and in the heating cable 105) of the two sets of metal filaments and a homogeneous distribution over the heating cable of the two sets of metal filaments.
  • the stainless steel filaments (the filaments of the second set) have an annealed microstructure; and the metal filaments of the first set can have an end-drawn microstructure.
  • the electrical resistance of the heating cable is 0.46 Ohm/meter.
  • the heating cable was crimped in a B-crimp connector and via a plug connected to a power supply.
  • the heating cable could be reliably crimped in the crimp connector.
  • the heating cable showed excellent flex fatigue resistance.
  • Another example of a hybrid electrical heating cable according to the invention comprises 9 strands twisted together, each of the 9 strands consists out of 7 metal filaments twisted together.
  • Three filaments of each strand are high carbon steel filaments with a corrosion protecting coating of Zn and a diameter of 60 ⁇ m.
  • the metal filaments of the first set of filaments have an end-drawn microstructure.
  • Four filaments (the filaments of the second set of filaments) of each strand are single end drawn stainless steel filaments of 60 ⁇ m diameter.
  • the single end drawn stainless steel filaments have an annealed microstructure.
  • the position of the seven metal filaments in the strand is random.
  • the hybrid heating cable has a resistance of 2 Ohm/meter.
  • the heating cable was crimped in in a B-crimp connector and via a plug connected to a power supply. The heating cable could be reliably crimped in the crimp connector.
  • Another example of a hybrid electrical heating cable according to the invention comprises 11 strands twisted together, each of the 11 strands consists out of seven metal filaments twisted together.
  • Five filaments of each strand are high carbon steel filaments (the first set of metal filaments) with a corrosion protecting coating of Zn and a diameter of 60 ⁇ m.
  • the metal filaments of the first set of filaments have an end-drawn microstructure.
  • Two filaments (the filaments of the second set of filaments) of each strand are single end drawn stainless steel filaments of 60 ⁇ m diameter.
  • the metal filaments of the second set of metal filaments have an annealed microstructure.
  • the position of the seven metal filaments in the strand is random.
  • the hybrid heating cable has a resistance of 1.2 Ohm/meter.
  • the heating cable was crimped in in a B-crimp connector and via a plug connected to a power supply. The heating cable could be reliably crimped in the crimp connector.
  • Another example of a hybrid electrical heating cable according to the invention comprises 6 strands twisted together, each of the 6 strands consists out of seven metal filaments twisted together.
  • Two filaments of each strand are low carbon steel filaments with a corrosion protecting coating of Zn and a diameter of 60 ⁇ m; these filaments are forming the first set of metal filaments.
  • the metal filaments of this first set of filaments have an end-drawn microstructure.
  • Five filaments (the filaments of the second set of filaments) of each strand are single end drawn stainless steel filaments of 60 ⁇ m diameter.
  • the metal filaments of the second set of filaments have an annealed microstructure.
  • the position of the seven metal filaments in the strand is random.
  • the hybrid heating cable has a resistance of 2.5 Ohm/meter.
  • the heating cable was crimped in in a B-crimp connector and the crimp connector has been connected to a power supply via the plug of the crimp connector. The heating cable could be reliably cri
  • Another example of a hybrid electrical heating cable according to the invention comprises twelve strands twisted together, each of the twelve strands consists out of seven metal filaments twisted together.
  • Two filaments of each strand are high carbon steel filaments with a diameter of 60 ⁇ m (the first set of metal filaments).
  • the metal filaments of the first set of filaments have an end-drawn microstructure.
  • Five filaments (the filaments of the second set of metal filaments) of each strand are single end drawn stainless steel filaments of 60 ⁇ m diameter.
  • the metal filaments of the second set of metal filaments have an annealed microstructure.
  • the position of the seven metal filaments in the strand is random.
  • the hybrid heating cable has a resistance of 1.7 Ohm/meter. This is cable A for the comparison.
  • the heating cable was crimped in a B-crimp connector and via a plug connected to a power supply. The heating cable could be reliably crimped in the crimp connector.
  • the hybrid heating cable was compared with another inventive hybrid electrical heating cable (cable B).
  • the hybrid heating cable comprises 8 strands twisted together, each of the 8 strands consists out of seven metal filaments twisted together.
  • Five filaments of each strand are high carbon steel filaments with a diameter of 60 ⁇ m (the metal filaments of the first set of metal filaments).
  • the metal filaments of the first set of filaments have an end-drawn microstructure.
  • Two filaments (the filaments of the second set of filaments) of each strand are single end drawn stainless steel filaments of 60 ⁇ m diameter.
  • the metal filaments of the second set of metal filaments have an annealed microstructure. The position of the seven metal filaments in the strand is random.
  • the hybrid heating cable has a resistance of 1.6 Ohm/meter.
  • cable A and cable B has been compared with the performance of a prior art cable (cable C) comprising 6 strands twisted together, each of the 6 strands consists out of 7 metal filaments twisted together; metal the filaments are high carbon steel filaments with a diameter of 60 ⁇ m. The metal filaments have an end-drawn microstructure. Cable C has a resistance of 1.6 Ohm/meter.
  • Figure 2 shows an example of a crimp terminal (or crimp connector) 200.
  • a heating cable 205 according to the invention is crimped in the crimp terminal 200.
  • the crimp terminal 200 has a pin 215 that is used to make contact with a power supply.
  • the crimp terminal can have a plug instead of a pin.
  • Figure 3 shows a cross section 303 of a heating cable 310 crimped in a B-type crimp terminal 317.
  • B-type crimp terminals O-type crimp terminals can be used as well.

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Claims (13)

  1. Câble chauffant électrique (105) comprenant deux ou plus de deux brins (110) de filaments métalliques torsadés ou câblés ensemble,
    - au moins l'un des brins (110) comprenant un premier ensemble de filaments métalliques (130) et un deuxième ensemble de filaments métalliques (140), à la fois pour conduire le courant électrique et générer de la chaleur lorsque le câble chauffant (105) est en cours d'utilisation ;
    - les filaments métalliques du premier ensemble de filaments métalliques (130) comprenant une couche d'acier ;
    - les filaments métalliques du deuxième ensemble de filaments métalliques (140) comprenant une couche d'acier ;
    - les filaments métalliques (140) du deuxième ensemble ayant une microstructure recuite ;
    caractérisé en ce que
    les filaments métalliques (130) du premier ensemble ont une microstructure étirée en bout.
  2. Câble chauffant électrique (105) selon la revendication précédente, la résistance électrique spécifique des filaments métalliques (140) du deuxième ensemble étant supérieure à la résistance électrique spécifique des filaments métalliques (130) du premier ensemble.
  3. Câble chauffant électrique (105) selon l'une quelconque des revendications précédentes, dans les brins (110) comprenant des filaments métalliques (130) du premier ensemble et des filaments métalliques (140) du deuxième ensemble, les filaments métalliques du premier ensemble et les filaments métalliques du deuxième ensemble étant mélangés.
  4. Câble chauffant électrique (105) selon l'une quelconque des revendications précédentes, dans la section transversale du câble chauffant (105), les sections transversales cumulées de filaments métalliques du deuxième ensemble étant au moins 25 % des sections transversales cumulées combinées de filaments métalliques des premier et deuxième ensembles.
  5. Câble chauffant électrique (105) selon l'une quelconque des revendications précédentes, la résistance électrique spécifique, exprimée en (ohm*mm2/m), des filaments métalliques du deuxième ensemble étant au moins 2 fois supérieure à la résistance électrique spécifique des filaments métalliques du premier ensemble.
  6. Câble chauffant électrique (105) selon l'une quelconque des revendications précédentes, la conductivité électrique du câble chauffant (105) étant déterminée à plus de 75 % par la conductivité électrique des filaments métalliques du premier ensemble.
  7. Câble chauffant électrique (105) selon les revendications 1 à 6, la couche d'acier des filaments métalliques du premier ensemble de filaments étant une couche d'acier à basse teneur en carbone ou à haute teneur en carbone.
  8. Câble chauffant électrique (105) selon les revendications 1 à 7, les filaments métalliques du premier ensemble de filaments comprenant une couche d'un métal ou d'un alliage métallique ayant une conductivité électrique spécifique supérieure à la conductivité électrique spécifique de la couche en acier.
  9. Câble chauffant électrique (105) selon la revendication 8, la couche d'un métal ou d'un alliage métallique ayant une conductivité électrique spécifique supérieure à la conductivité électrique spécifique de la couche d'acier étant une couche en cuivre ou une couche en alliage de cuivre.
  10. Câble chauffant électrique (105) selon les revendications 1 à 9, les filaments métalliques du deuxième ensemble de filaments métalliques étant des filaments en acier inoxydable.
  11. Câble chauffant électrique (105) selon les revendications 1 à 9, la couche d'acier des filaments métalliques du deuxième ensemble de filaments métalliques étant une couche d'acier à basse teneur en carbone ou à haute teneur en carbone, comprenant de préférence une couche métallique résistant à la corrosion autour de la couche d'acier à basse teneur en carbone ou à haute teneur en carbone.
  12. Assemblage d'un câble chauffant électrique hybride (205) selon l'une quelconque des revendications précédentes et d'un connecteur à sertir (200), le câble chauffant électrique hybride (205) étant serti dans le connecteur à sertir (200).
  13. Assemblage selon la revendication 12, comprenant une alimentation électrique et le connecteur à sertir (200) étant connecté à l'alimentation électrique sans chevauchement d'une partie d'extrémité du câble chauffant (205) avec une partie d'extrémité d'un câble électrique.
EP15707657.1A 2014-03-26 2015-03-04 Câble de chauffage électrique hybride Active EP3123818B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL15707657T PL3123818T3 (pl) 2014-03-26 2015-03-04 Hybrydowy elektryczny kabel grzejny
RS20191644A RS59829B1 (sr) 2014-03-26 2015-03-04 Hibridni električni kabl za grejanje

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Application Number Priority Date Filing Date Title
EP14161637 2014-03-26
PCT/EP2015/054498 WO2015144406A1 (fr) 2014-03-26 2015-03-04 Câble de chauffage électrique hybride

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EP3123818A1 EP3123818A1 (fr) 2017-02-01
EP3123818B1 true EP3123818B1 (fr) 2019-11-27

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EP (1) EP3123818B1 (fr)
CN (1) CN106105386A (fr)
PL (1) PL3123818T3 (fr)
RS (1) RS59829B1 (fr)
WO (1) WO2015144406A1 (fr)

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DE102018117942B4 (de) * 2018-07-25 2020-02-06 Leoni Kabel Gmbh Hochleistungs-Heizkabel

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Publication number Priority date Publication date Assignee Title
US3131469A (en) * 1960-03-21 1964-05-05 Tyler Wayne Res Corp Process of producing a unitary multiple wire strand
JPH09147631A (ja) * 1995-09-20 1997-06-06 Denso Corp 検出器用のリード線
DE10137976A1 (de) * 2001-08-08 2002-11-21 Leoni Draht Gmbh & Co Kg Litze, insbesondere für eine Sitzheizung für ein Kraftfahrzeug, und Verfahren zum Einstellen gewünschter elektrischer Eigenschaften einer Litze
DE102008027295B4 (de) * 2008-06-06 2010-05-06 Dlb Draht Und Litzen Gmbh Verfahren zur Herstellung einer Litze sowie Litze aus mehreren Einzeldrähten
US9439244B2 (en) * 2011-04-04 2016-09-06 Nv Bekaert Sa Heating cable comprising steel monofilaments

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Also Published As

Publication number Publication date
PL3123818T3 (pl) 2020-06-01
CN106105386A (zh) 2016-11-09
EP3123818A1 (fr) 2017-02-01
RS59829B1 (sr) 2020-02-28
WO2015144406A1 (fr) 2015-10-01

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