EP4258292A1 - Elektrische verbindungsvorrichtung mit erhöhter feuerfestigkeit und verfahren zur herstellung einer solchen vorrichtung - Google Patents

Elektrische verbindungsvorrichtung mit erhöhter feuerfestigkeit und verfahren zur herstellung einer solchen vorrichtung Download PDF

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Publication number
EP4258292A1
EP4258292A1 EP23165707.3A EP23165707A EP4258292A1 EP 4258292 A1 EP4258292 A1 EP 4258292A1 EP 23165707 A EP23165707 A EP 23165707A EP 4258292 A1 EP4258292 A1 EP 4258292A1
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EP
European Patent Office
Prior art keywords
ketone
sheath
ether
conductive element
electrical 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.)
Pending
Application number
EP23165707.3A
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English (en)
French (fr)
Inventor
Denis Boidard
Dimitri LAMANNA
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.)
Tresse Metallique J Forissier
Original Assignee
Tresse Metallique J Forissier
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 Tresse Metallique J Forissier filed Critical Tresse Metallique J Forissier
Publication of EP4258292A1 publication Critical patent/EP4258292A1/de
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H01B3/427—Polyethers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/307—Other macromolecular compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the present invention relates to the technical field of electrical connection devices, and finds an advantageous application in the field of battery packs for electric motor vehicles, without this being limiting.
  • Electrical connection devices are known from the prior art comprising a conductive element extending longitudinally, for example in the form of a braid, a cable, a multilayer or single-layer strip, and covered with a sheath. thermally insulating.
  • the conductive element is by nature flexible or rigid to be shaped to follow a specific path in order to make the electrical connection as such between two devices.
  • the conductive element is for example made of copper or aluminum, plated, tinned or nickel-plated, or other conductive materials sometimes alternately.
  • the conductive element is electrically and thermally insulated by the peripheral extrusion of a sheath of suitable material, such as so-called “high performance” PVC in that it resists, for example, a temperature of around 125°C. .
  • the sheath is made of polyamide PA 11, PA 12 or PVC which meets the UL94V-0 standard for flammability of plastic materials.
  • the V-0 rating requires that vertical combustion stops after 10 seconds, with spills permitted but must not be burned.
  • the test in accordance with the R100 standard aims to verify the operational safety of the battery (SRSEE) in the event of exposure to a fire coming from outside the vehicle following, for example, loss of fuel by a vehicle (either the vehicle itself or a nearby vehicle). The driver and passengers must then have enough time (5 minutes) to evacuate the vehicle.
  • SRSEE operational safety of the battery
  • One of the aims of the invention is to overcome the drawbacks of the prior art by proposing an electrical connection device, preferably used to connect battery packs or as power and electrical interconnection bars, which makes it possible to satisfy the R 100 standard, by withstanding approximately 500° for at least 5 min, under an electrical voltage greater than 500 V without dielectric breakdown.
  • an electrical connection device comprising a conductive element extending longitudinally, and coated with a thermally insulating sheath made of a material comprising polyarylene-ether-ketone ( PAEK), also known as polyaryl ether ketone.
  • PAEK polyarylene-ether-ketone
  • PAEKs consist of aromatic nuclei (aryls) linked by an oxygen atom (ether) and/or by a carbonyl group (ketone). Their properties mainly depend on the ether/ketone ratio.
  • A designates an aryl function
  • E designates an ether function
  • K designates a ketone function. In the following, these abbreviations will be used instead of common names to designate the compounds to which they relate.
  • connection device according to the invention makes it possible to satisfy the R100 standard in that it resists 500°C for 5 min while retaining its dielectric properties (no breakdown under the nominal voltage assigned).
  • the PAEK is present in the material in a mass fraction of at least 50% relative to the total weight of material, more preferably at least 80%, and even more preferably at least 95% to 100%.
  • the material can be made up (100%), or essentially made up of PAEK, it being understood that the 100% content is to be qualified with the possible presence of additives of all kinds, both chemical and mechanical, for example carbon fibers. , or impurities.
  • the PAEK of the material constituting the sheath comprises PEKK, or PEKK copolymers.
  • PEKK offers the advantage of having even higher temperature resistance than other PAEKs, in particular PEEK or PEK, which makes it all the more useful for producing the sheath used in the invention which requires resistance to the high heat released during a fire.
  • the invention also relates to a method of shaping an electrical connection device with increased fire resistance.
  • the invention relates to an electrical connection device (1) well known to those skilled in the art in that it comprises an electrically conductive element (2) extending longitudinally, covered with a sheath (3) thermally insulating extruded around the conductive element (2).
  • connection device (1) is mainly used in the field of energy transmission, replacement of cables, rigid bus bars, in electrical appliances (cabinets, circuit breakers, inverters) low voltage electrical panels, transformers ( connection between the busbar and the transformer), in automotive electrical connections, for example in vehicle battery packs.
  • the conductive element (2) of the device (1) may be in the form of a metal braid, a cable, or any other suitable conductive element.
  • the conductive element (2) comprises example a single strip of copper or aluminum, bare or plated, tinned or nickel-plated, or having an aluminum core coated on both sides with copper, or a copper core coated on both sides with aluminum, or as illustrated in figure 2
  • the conductive element (2) comprises a stack of strip (4), for example made of copper or aluminum, or alternating copper/aluminum, having for example a width ranging from 9 to 120 mm, with each strip (4) having a thickness of for example between 0.5 mm and 1 mm.
  • the invention lies in that the sheath (3) is made of a material comprising polyarylene-ether-ketone (PAEK), also called polyaryl-ether-ketone.
  • PAEK polyarylene-ether-ketone
  • the material can consist of (100%), or essentially consist of PAEK, it being understood that the 100% content is to be qualified with the possible presence of additives of all kinds, for example carbon fibers, or 'impurities.
  • the PAEK of the material constituting the sheath (3) comprises PEKK, or copolymers of PEKK.
  • PEKK offers the advantage of having even higher temperature resistance than other PAEKs, in particular PEEK or PEK, which makes it all the more useful for producing the sheath (3) used. in the invention which requires resisting the high heat released during a fire.
  • the device (1) tested is subjected to direct and indirect exposure to a flame produced by the combustion of a commercial fuel, according to the requirements of Annex 8E of Regulation No. 100 (Rev2) of the UNECE (ECE R100 Rev2).
  • the device (1) is subjected to a direct pool fire for 70 seconds. Subsequently, the device (1) is exposed to an indirect fire for 60 seconds (interposition of a refractory brick screen).
  • the device (1) could withstand 500°C for 5 minutes, under an electrical voltage greater than 500 V without dielectric breakdown, allowing it to satisfy the R100 standard.
  • resisting we mean that the sheath (3) maintains its integrity and ensures the thermal and electrical insulation function of the conductive element (2), the conductive element continuing to provide the electrical conduction function.
  • the device according to the invention is intended to be used to connect battery packs or as power and electrical interconnection bars. For this purpose, it is intended to be folded and shaped in order to make the various electrical connections.
  • the invention therefore also aims to make it possible to deliver to the end customer a ready-to-use electrical connection device, previously configured according to connection needs.
  • the electrical device is wound around a coil of 600 mm in diameter for example.
  • the operation consisting of shaping the device is delicate, since the heat generated during the extrusion operation tends to make the sheath adhere to the strip.
  • the Applicant's approach was to find an industrializable process to achieve said conformation, without risk of damaging the device, which is simple and compatible with industrial rates.
  • the conformation method according to the invention of the aforementioned device (1) is remarkable in that it comprises a step of induction heating of the electrical device unrolled continuously, at a temperature greater than or equal to the glass transition temperature of the material of the sheath, and in particular between 132°C and 200°C, immediately followed by a step of folding to a desired shape, and a step of cutting the device to a desired length.
  • the device is folded while the sheath is in a rubbery state.
  • the folding step is carried out between 1 and 5 seconds at the output of the induction heating.
  • the invention makes it possible to heat by induction the metal strip, and therefore the sheath above the glass transition temperature of the material comprising polyaryl-ether-ketone, which allows the conformation of the electrical connection device according to the final connection constraints, to be ready for use, while ensuring that the integrity of the sheath is maintained.
  • the temperature rise is rapid, and compatible with industrial rates, and the risk of breakage in the folding zones is avoided.
  • Heating is carried out by an inductor which has a power of 50KW, for example, and which has a length preferably between 100 mm and 500 mm, for example 200 mm.
  • a person skilled in the art will know how to adapt the running speed of the electrical connection device, and the power of the inductor to obtain sufficient exposure time of the conductive device to a temperature between 150°C and 200°C.
  • the running speed is for example 10m/min and the exposure time is of the order of 6 to 30s.
  • the invention also provides an installation for implementing the aforementioned method, remarkable in that it comprises means for continuously unwinding an electrical connection device, such as coils and rollers of transitics driven in rotation, a inductor crossed by the device and adapted to heat the device to a temperature greater than or equal to the glass transition temperature of the material of the sheath, the means for folding the electrical device, and the means for cutting the device.
  • an electrical connection device such as coils and rollers of transitics driven in rotation
  • the folding means are of any suitable type and well known to those skilled in the art, such as a bender.
  • the cutting means are of any suitable type and also well known to those skilled in the art, such as shears.
  • the invention provides an electrical connection device, preferably used to connect battery packs or as power and electrical interconnection bars, which makes it possible to satisfy the R 100 standard, by resisting at approximately 500° for at least 5 min, under an electrical voltage greater than 500 V without dielectric breakdown.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Conductive Materials (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
EP23165707.3A 2022-04-06 2023-03-30 Elektrische verbindungsvorrichtung mit erhöhter feuerfestigkeit und verfahren zur herstellung einer solchen vorrichtung Pending EP4258292A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2203146A FR3134476A1 (fr) 2022-04-06 2022-04-06 Dispositif de connexion électrique à résistance au feu accrue

Publications (1)

Publication Number Publication Date
EP4258292A1 true EP4258292A1 (de) 2023-10-11

Family

ID=82319901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23165707.3A Pending EP4258292A1 (de) 2022-04-06 2023-03-30 Elektrische verbindungsvorrichtung mit erhöhter feuerfestigkeit und verfahren zur herstellung einer solchen vorrichtung

Country Status (2)

Country Link
EP (1) EP4258292A1 (de)
FR (1) FR3134476A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078946A1 (en) * 2001-03-29 2002-10-10 Greene, Tweed Of Delaware, Inc. Electrical connectors for use in downhole tools
WO2008091253A1 (en) * 2007-01-25 2008-07-31 Sabic Innovative Plastics Ip B.V. High heat electrical connectors
WO2010085419A1 (en) * 2009-01-20 2010-07-29 Arkema Inc. High performance connectors
EP3089169A1 (de) * 2013-12-26 2016-11-02 Furukawa Electric Co., Ltd. Isolierter draht, spule und elektronische/elektrische vorrichtung
EP3239988A1 (de) * 2014-12-26 2017-11-01 Furukawa Electric Co. Ltd. Isolierter elektrischer draht mit ausgezeichneter biegebeständigkeit, spule und elektronische/elektrische ausrüstung damit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078946A1 (en) * 2001-03-29 2002-10-10 Greene, Tweed Of Delaware, Inc. Electrical connectors for use in downhole tools
WO2008091253A1 (en) * 2007-01-25 2008-07-31 Sabic Innovative Plastics Ip B.V. High heat electrical connectors
WO2010085419A1 (en) * 2009-01-20 2010-07-29 Arkema Inc. High performance connectors
EP3089169A1 (de) * 2013-12-26 2016-11-02 Furukawa Electric Co., Ltd. Isolierter draht, spule und elektronische/elektrische vorrichtung
EP3239988A1 (de) * 2014-12-26 2017-11-01 Furukawa Electric Co. Ltd. Isolierter elektrischer draht mit ausgezeichneter biegebeständigkeit, spule und elektronische/elektrische ausrüstung damit

Also Published As

Publication number Publication date
FR3134476A1 (fr) 2023-10-13

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