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EP1523225B1 - Heating assembly with PTC elements, particularly for motor vehicles - Google Patents

Heating assembly with PTC elements, particularly for motor vehicles Download PDF

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Publication number
EP1523225B1
EP1523225B1 EP03292474A EP03292474A EP1523225B1 EP 1523225 B1 EP1523225 B1 EP 1523225B1 EP 03292474 A EP03292474 A EP 03292474A EP 03292474 A EP03292474 A EP 03292474A EP 1523225 B1 EP1523225 B1 EP 1523225B1
Authority
EP
European Patent Office
Prior art keywords
adhesive
ohms
ptc
ptc element
heating assembly
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
EP03292474A
Other languages
German (de)
French (fr)
Other versions
EP1523225A1 (en
Inventor
Michel Brun
Christophe Schmittheisler
Pascal Miss
Maxime Mundel
Mathieu Mougey
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.)
Mahle Behr France Rouffach SAS
Original Assignee
Behr France Rouffach SAS
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
Priority to AT03292474T priority Critical patent/ATE453306T1/en
Application filed by Behr France Rouffach SAS filed Critical Behr France Rouffach SAS
Priority to DE50312260T priority patent/DE50312260D1/en
Priority to EP03292474A priority patent/EP1523225B1/en
Priority to PCT/EP2004/010328 priority patent/WO2005039242A1/en
Priority to JP2006529988A priority patent/JP2007507384A/en
Priority to CNB2004800291073A priority patent/CN100488323C/en
Priority to US10/574,543 priority patent/US7759610B2/en
Publication of EP1523225A1 publication Critical patent/EP1523225A1/en
Application granted granted Critical
Publication of EP1523225B1 publication Critical patent/EP1523225B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Definitions

  • the invention relates to a heating arrangement with a PTC element, in particular for a motor vehicle, according to the preamble of claim 1.
  • a heating arrangement with a PTC element for passenger vehicles wherein an additional heating with a radiator, which is flowed through in the operation of the additional heating of heating air, and provided with at least one air outlet opening in the foot of a passenger compartment to which the heating air is passed.
  • the radiator is designed as an electric PTC element, which is arranged directly on the air outlet opening in the foot region.
  • a PTC element is arranged in the form of several Schuwaben in a plastic frame not described in detail, which encloses the air outlet opening.
  • contact plates to PTC elements are conventionally carried out by means of an adhesive, wherein - depending on the application - insulating adhesives with a resistivity of over 10000 ohm cm, or conductive adhesives are used with a resistivity of less than 10 ohm x cm , Such connections between contact plate and PTC element leave nothing to be desired.
  • EP 1 182 908 A1 is a similar prior art.
  • a heating arrangement is provided with at least one PTC element, wherein the PTC element is arranged between contact plates, which serve for electrical connection, wherein the contact plates and the PTC element are connected by means of an adhesive having a specific electrical resistance of at least 50 Ohm x cm and a maximum of 500 ohms x cm, preferably of at least 80 ohms x cm and a maximum of 150 ohms x cm, in particular of 100 ohms x cm +/- 10%.
  • the heating and safety aspects are considered simultaneously when an adhesive with a certain electrical resistivity, in particular an adhesive with a specific electrical resistance of 50 to 500 ohm.cm, is selected, the PTC elements having contact sheets through this electrically conductive adhesive get connected.
  • the specific electrical resistance should be selected so that on the one hand the risk of a short circuit between the contact plates is avoided.
  • the specific electrical resistance should be selected so that in case of damage to the heating system in As a result of aging, the adhesive layer may have a forced relaxation, whereby there is no more direct contact between the PTC element and the contact sheets, but in this case the adhesive layer has sufficient electrical conductivity to maintain the heating function.
  • the adhesive layer has an additional electrical resistance and shows an acceptable heating power. Advantage of the invention is that, in this case, the heating function is not disturbed.
  • the above range of resistivity has been found to be most suitable.
  • the layer thickness of the adhesive between the PTC element and a Kontakblech is negligible before a forced relaxation and is after a forced relaxation of a maximum of 0.02 microns, in particular 0.01 to +/- 10%.
  • solder instead of an adhesive, a solder with a corresponding electrical resistivity can also be used.
  • PTC heating arrangement 1 with ceramic PTC elements in each case a PTC element 2 is glued between two mutually parallel contact plates 3 (plus pole) and 4 (minus pole), in this case by means of an adhesive 5 having a specific electrical resistance of about 100 ohms x cm has.
  • an adhesive 5 having a specific electrical resistance of about 100 ohms x cm has.
  • corrugated ribs 6 are attached by means of a corresponding adhesive connection and to these, again with a corresponding adhesive connection depending on a further contact plate 3 and 4.
  • a plastic frame 7 To the arrangement described above around a plastic frame 7 is arranged. The flow direction of the air is enclosed Fig. 1 in the direction of view.
  • the length of a PTC element 2 with L here 035 mm
  • the thickness of the PTC element 2 with e in this case 1.4 mm
  • the average thickness of the adhesive layer between the surface of the PTC element 2 and a contact sheet 3 or 4 with eta here 0.01 micron
  • the width of the adhesive around the PTC element 2 between the contact plates 3 and 4 is denoted by s and is presently 1 mm.
  • the voltage between the contact sheets 3 and 4 is denoted by U and is according to the present embodiment, 13 V, but may also be greater, for example. 48 V.
  • the electrical resistivity of the adhesive 5 is denoted by Rho adhesives, the resistance of the PTC element 2 with R PTC, the resistance of the layer of adhesive between the PTC element 2 and contact plate 3 or 4 with R Adh.
  • the power of the PTC element 2 is designated P PTC , the power of the adhesive 5 between the contact plates 3 and 4 with P b , the power of the PTC element 2 in conjunction with the adhesive 5 without forced relaxation with P bonding + PTC without forced relaxation , the power of the PTC element 2 in conjunction with the forced release adhesive 5 with P sticking + PTC after forced relaxation , the total power with P total .
  • the ratio P PTC / P b should be chosen as large as possible. Further, however, the ratio of P bonding + PTC without forced relaxation / P bonding + PTC after forced relaxation should be considered as close to 1 as possible. In this case, the ratio of P PTC / P b lies in particular between approximately 4 and 40 and the ratio of P adhesive + PTC without forced relaxation / P bonding + PTC after forced relaxation between approx. 1,2 and 1,02.

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  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
  • Thermistors And Varistors (AREA)

Abstract

A positive temperature coefficient (PTC) element (2) fits between first (3) and second (4) sheet metal contacts that serve as an electrical link. The sheet metal contacts and the PTC element connect by means of an adhesive with a specific electric resistance of 50 Ohms x cm minimum and 500 Ohms x cm maximum. An independent claim is also included for adhesive or solder used between a ceramic positive temperature coefficient element and an electrically conductive sheet metal contact.

Description

Die Erfindung betrifft eine Heizungsanordnung mit einem PTC-Element, insbesondere für ein Kraftfahrzeug, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a heating arrangement with a PTC element, in particular for a motor vehicle, according to the preamble of claim 1.

Aus der DE 101 44 757 A1 ist eine Heizungsanordnung mit einem PTC-Element für Personenfahrzeuge bekannt, wobei eine Zusatzheizung mit einem Heizkörper, der im Betrieb der Zusatzheizung von Heizluft durchströmt wird, und mit mindestens einer Luftaustrittsöffnung im Fußbereich eines Fahrgastraumes versehen ist, zu der die Heizluft geleitet wird. Um auf flexible Weise eine vertikale Temperaturschichtung im Fahrgastraum erzeugen zu können, die insbesondere auch an Sitzen im Fond als angenehm empfunden wird, ist der Heizkörper als ein elektrisches PTC-Element gestaltet, welches unmittelbar an der Luftaustrittsöffnung im Fußbereich angeordnet ist. Ein derartiger Zuheizer lässt noch Wünsche offen. Gemäß einem offenbarten Ausführungsbeispiel ist ein PTC-Element in Gestalt mehrerer Heizwaben in einem nicht näher beschriebenen Kunststoff-Rahmen angeordnet, der die Luftaustrittsöffnung einfasst.From the DE 101 44 757 A1 a heating arrangement with a PTC element for passenger vehicles is known, wherein an additional heating with a radiator, which is flowed through in the operation of the additional heating of heating air, and provided with at least one air outlet opening in the foot of a passenger compartment to which the heating air is passed. In order to be able to produce a vertical temperature stratification in the passenger compartment in a flexible manner, which is particularly pleasant for seats in the rear, the radiator is designed as an electric PTC element, which is arranged directly on the air outlet opening in the foot region. Such a heater can still be desired. According to a disclosed embodiment, a PTC element is arranged in the form of several Heizwaben in a plastic frame not described in detail, which encloses the air outlet opening.

Die Anbringung von Kontakblechen an PTC-Elementen erfolgt herkömmlicherweise mittels eines Klebstoffs, wobei - je nach Einsatzfall - isolierende Klebstoffe mit einem spezifischen elektrischen Widerstand von über 10000 Ohm x cm, oder leitende Klebstoffe mit einem spezifischen elektrischen Widerstand von unter 10 Ohm x cm verwendet werden. Derartige Verbindungen zwischen Kontakblech und PTC-Element lassen noch Wünsche offen.The attachment of contact plates to PTC elements is conventionally carried out by means of an adhesive, wherein - depending on the application - insulating adhesives with a resistivity of over 10000 ohm cm, or conductive adhesives are used with a resistivity of less than 10 ohm x cm , Such connections between contact plate and PTC element leave nothing to be desired.

EP 1 182 908 A1 ist ein ähnlicher Stand der Technik. EP 1 182 908 A1 is a similar prior art.

Es ist Aufgabe der Erfindung, eine verbesserte Heizungsanordnung mit PTC-Element zur Verfügung zu stellen.It is an object of the invention to provide an improved heating arrangement with PTC element available.

Diese Aufgabe wird gelöst durch eine Heizungsanordnung mit einem PTC-Element mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.This object is achieved by a heating arrangement with a PTC element having the features of claim 1. Advantageous embodiments are the subject matter of the subclaims.

Erfindungsgemäß ist eine Heizungsanordnung mit mindestens einem PTC-Element vorgesehen, wobei das PTC-Element zwischen Kontaktblechen angeordnet ist, die der elektrischen Anbindung dienen, wobei die Kontaktbleche und das PTC-Element mittels eines Klebstoffes verbunden sind, der einen spezifischen elektrischen Widerstand von minimal 50 Ohm x cm und maximal 500 Ohm x cm, vorzugsweise von minimal 80 Ohm x cm und maximal 150 Ohm x cm, insbesondere von 100 Ohm x cm +/- 10%, aufweist.According to the invention, a heating arrangement is provided with at least one PTC element, wherein the PTC element is arranged between contact plates, which serve for electrical connection, wherein the contact plates and the PTC element are connected by means of an adhesive having a specific electrical resistance of at least 50 Ohm x cm and a maximum of 500 ohms x cm, preferably of at least 80 ohms x cm and a maximum of 150 ohms x cm, in particular of 100 ohms x cm +/- 10%.

Die Heizungs- und Sicherheitsaspekte werden gleichzeitig berücksichtigt, wenn ein Klebstoff mit einem gewissen spezifischen elektrischen Widerstand, insbesondere ein Klebstoff mit einem spezifischen elektrischen Widerstand von 50 bis 500 Ohm x cm, gewählt wird, wobei die PTC-Elemente mit Kontaktblechen durch diesen elektrisch leitenden Klebstoff verbunden werden. Dabei ist der spezifische elektrische Widerstand so zu wählen, dass zum Einen das Risiko eines Kurzschlusses zwischen den Kontakblechen vermieden wird. Zum Anderen ist der spezifische elektrische Widerstand so zu wählen, dass im Falle einer Beschädigung der Heizungsanordnung in Folge von Alterung die Klebstoffschicht eine Zwangentspannung haben kann, wodurch es keinen direkt Kontakt mehr zwischen dem PTC-Element und den Kontaktblechen gibt, jedoch für diesen Fall die Klebstoffschicht eine ausreichende elektrische Leitfähigkeit aufweist, um die Heizfunktion aufrecht zu erhalten. Dabei hat die Klebstoffschicht einen zusätzlichen elektrischen Widerstand und zeigt eine annehmbare Heizleistung. Vorteil der Erfindung ist dass, in diesem Fall die Heizfunktion nicht gestört wird. Der o.g. Bereich für den spezifischen elektrischen Widerstand hat sich als am besten geeignet herausgestellt.The heating and safety aspects are considered simultaneously when an adhesive with a certain electrical resistivity, in particular an adhesive with a specific electrical resistance of 50 to 500 ohm.cm, is selected, the PTC elements having contact sheets through this electrically conductive adhesive get connected. The specific electrical resistance should be selected so that on the one hand the risk of a short circuit between the contact plates is avoided. On the other hand, the specific electrical resistance should be selected so that in case of damage to the heating system in As a result of aging, the adhesive layer may have a forced relaxation, whereby there is no more direct contact between the PTC element and the contact sheets, but in this case the adhesive layer has sufficient electrical conductivity to maintain the heating function. The adhesive layer has an additional electrical resistance and shows an acceptable heating power. Advantage of the invention is that, in this case, the heating function is not disturbed. The above range of resistivity has been found to be most suitable.

Bevorzugt ist die Schichtdicke des Klebstoffs zwischen dem PTC-Element und einem Kontakblech vor einer Zwangsentspannung vernachlässigbar und beträgt nach einer Zwangentspannung maximal 0,02 µm, insbesondere 0,01 um +/- 10%.Preferably, the layer thickness of the adhesive between the PTC element and a Kontakblech is negligible before a forced relaxation and is after a forced relaxation of a maximum of 0.02 microns, in particular 0.01 to +/- 10%.

Anstelle von einem Klebstoff kann auch ein Lot mit einem entsprechenden spezifischen elektrischen Widerstand verwendet werden.Instead of an adhesive, a solder with a corresponding electrical resistivity can also be used.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung im Einzelnen erläutert. In der Zeichnung zeigen:

Fig. 1
eine Ansicht auf eine erfindungsgemäße Heizungsanordnung,
Fig. 2
einen vergrößerten Schnitt durch die Heizungsanordnung von Fig. 1 entlang der Linie II-II in Fig. 1,
Fig. 3
einen Schnitt entlang der Linie III-III in Fig. 2,
Fig. 4
eine Fig. 2 entsprechende Darstellung nach einer Zwangsentspannung,
Fig. 5
ein elektrisches Ersatzschaubild, das die Widerstände verdeutlicht, und
Fig. 6
ein Fig. 5 entsprechendes Ersatzschaubild, das die Widerstände nach einer Zwangsentspannung verdeutlicht.
In the following the invention with reference to an embodiment with reference to the drawings will be explained in detail. In the drawing show:
Fig. 1
a view of a heating arrangement according to the invention,
Fig. 2
an enlarged section through the heating arrangement of Fig. 1 along the line II-II in Fig. 1 .
Fig. 3
a section along the line III-III in Fig. 2 .
Fig. 4
a Fig. 2 corresponding representation after a forced relaxation,
Fig. 5
a replacement electric diagram illustrating the resistances, and
Fig. 6
one Fig. 5 corresponding replacement diagram illustrating the resistances after a forced relaxation.

Bei PTC-Heizungsanordnung 1 mit Keramik-PTC-Elementen ist jeweils ein PTC-Element 2 zwischen zwei parallel zueinander angeordneten Kontaktblechen 3 (Pluspol) und 4 (Minuspol) eingeklebt, vorliegend mittels eines Klebstoffes 5, der einen spezifischen elektrischen Widerstand von etwa 100 Ohm x cm hat. Auf den jeweils dem PTC-Element 2 gegenüberliegenden Seiten der Kontaktbleche 3 und 4 sind mittels einer entsprechenden Klebe-Verbindung Wellrippen 6 angebracht und an diesen, ebenfalls wiederum mit einer entsprechenden Klebe-Verbindung je ein weiteres Kontaktblech 3 und 4. Um die zuvor beschriebene Anordnung herum ist ein Kunststoff-Rahmen 7 angeordnet. Die Strömungsrichtung der Luft liegt bei Fig. 1 in Blickrichtung.In PTC heating arrangement 1 with ceramic PTC elements, in each case a PTC element 2 is glued between two mutually parallel contact plates 3 (plus pole) and 4 (minus pole), in this case by means of an adhesive 5 having a specific electrical resistance of about 100 ohms x cm has. On each of the PTC element 2 opposite sides of the contact plates 3 and 4 corrugated ribs 6 are attached by means of a corresponding adhesive connection and to these, again with a corresponding adhesive connection depending on a further contact plate 3 and 4. To the arrangement described above around a plastic frame 7 is arranged. The flow direction of the air is enclosed Fig. 1 in the direction of view.

Im Folgenden wird die Länge eines PTC-Elements 2 mit L, vorliegend 035 mm, die Breite des PTC-Elements 2 mit 1, vorliegend 8 mm, und die Dicke des PTC-Elements 2 mit e, vorliegend 1,4 mm, bezeichnet. Die durchschnittliche Dicke der Klebstoffschicht zwischen der Oberfläche des PTC-Elements 2 und einem Kontaktblech 3 oder 4 mit eta, vorliegend 0,01 µm, bezeichnet. Die Breite des Klebstoffes um das PTC-Element 2 zwischen den Kontaktblechen 3 und 4 wird mit s bezeichnet und beträgt vorliegend 1 mm.Hereinafter, the length of a PTC element 2 with L, here 035 mm, the width of the PTC element 2 with 1, in this case 8 mm, and the thickness of the PTC element 2 with e, in this case 1.4 mm, referred to. The average thickness of the adhesive layer between the surface of the PTC element 2 and a contact sheet 3 or 4 with eta, here 0.01 micron, referred to. The width of the adhesive around the PTC element 2 between the contact plates 3 and 4 is denoted by s and is presently 1 mm.

Die Spannung zwischen den Kontaktblechen 3 und 4 wird mit U bezeichnet und beträgt gemäß dem vorliegenden Ausführungsbeispiel 13 V, kann jedoch auch größer sein, bspw. 48 V.The voltage between the contact sheets 3 and 4 is denoted by U and is according to the present embodiment, 13 V, but may also be greater, for example. 48 V.

Der spezifische elektrische Widerstand des Klebstoffs 5 wird mit RhoKleb bezeichnet, der Widerstand des PTC-Elements 2 mit RPTC, der Widerstand der Klebstoffschicht zwischen PTC-Element 2 und Kontaktblech 3 oder 4 mit RKleb.The electrical resistivity of the adhesive 5 is denoted by Rho adhesives, the resistance of the PTC element 2 with R PTC, the resistance of the layer of adhesive between the PTC element 2 and contact plate 3 or 4 with R Adh.

Die Leistung des PTC-Elements 2 wird mit PPTC bezeichnet, die Leistung des Klebstoffes 5 zwischen den Kontaktblechen 3 und 4 mit Pb, die Leistung des PTC-Elements 2 in Verbindung mit dem Klebstoff 5 ohne Zwangsentspannung mit PKleben + PTC ohne Zwangentspannung, die Leistung des PTC-Elements 2 in Verbindung mit dem Klebstoff 5 mit Zwangsentspannung mit PKleben + PTC nach Zwangentspannung, die Gesamtleistung mit Pgesamt.The power of the PTC element 2 is designated P PTC , the power of the adhesive 5 between the contact plates 3 and 4 with P b , the power of the PTC element 2 in conjunction with the adhesive 5 without forced relaxation with P bonding + PTC without forced relaxation , the power of the PTC element 2 in conjunction with the forced release adhesive 5 with P sticking + PTC after forced relaxation , the total power with P total .

Hierbei ergibt sich der Widerstand RKleb des Klebstoffs 5 zwischen dem PTC-Element und einem Kontaktblech 3 oder 4 bzw. der Widerstand Rb des das PTC-Element 2 umgebenden Klebstoffes 5 wie folgt:

  • (1) RKleb = RhOKleb x eta / (L x l)
  • (2) Rb = RhoKleb x e / (2(L+I) x s)
Here, the resistance R adhesives of the adhesive 5 between the PTC element and a contact plate 3 or 4 and the resistance R b of the PTC element 2 surrounding adhesive 5 given as follows:
  • (1) R = Adhesives Adhesives RhO x eta / (L x l)
  • (2) R b = Rho bond x e / (2 (L + I) x s)

Ersatzschaubilder für die Schaltungen der Widerstände sind in den Figuren 5 und 6 dargestellt.Replacement diagrams for the circuits of the resistors are in the FIGS. 5 and 6 shown.

Die Leistung PKleben + PTC ohne Zwangentspannung ergibt sich bZW. die Leistung PKleben . + PTC nach Zwangentspannung durch

  • (3) PKleben + PTC ohne Zwangentspannung = U2 / RPTC
  • (4) PKleben + PTC nach Zwangentspannung = U2 / (2RKleb + RPTC)
The power P sticking + PTC without forced relaxation results bZW. the power P gluing . + PTC after forced relaxation by
  • (3) P bonding + PTC without forced relaxation = U 2 / R PTC
  • (4) P bonding + PTC after forced relaxation = U 2 / (2R adhesive + R PTC )

Um einen optimalen Wirkungsgrad des PTC-Elements 2 zu bewirken, sollte das Verhältnis PPTC/ Pb möglichst groß gewählt werden. Ferner sollte jedoch das Verhältnis von PKleben + PTC ohne Zwangentspannung / PKleben + PTC nach Zwangentspannung möglichst nahe bei 1 liegen. Dabei liegt das Verhältnis von PPTC/ Pb insbesondere zwischen ca. 4 und 40 und das Verhältnis von PKleben + PTC ohne Zwangentspannung / PKleben + PTC nach Zwangentspannung zwischen Ca. 1,2 und 1,02.In order to bring about optimum efficiency of the PTC element 2, the ratio P PTC / P b should be chosen as large as possible. Further, however, the ratio of P bonding + PTC without forced relaxation / P bonding + PTC after forced relaxation should be considered as close to 1 as possible. In this case, the ratio of P PTC / P b lies in particular between approximately 4 and 40 and the ratio of P adhesive + PTC without forced relaxation / P bonding + PTC after forced relaxation between approx. 1,2 and 1,02.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

  1. 1 Heizungsanordnung1 heating arrangement
  2. 2 PTC-Element2 PTC element
  3. 3 Kontaktblech3 contact sheet
  4. 4 Kontaktblech4 contact sheet
  5. 5 Klebstoff5 adhesive
  6. 6 Wellrippe6 corrugated rib
  7. 7 Kunststoff-Rahmen7 plastic frame

Claims (7)

  1. A heating assembly with at least one PTC element, in particular for a motor vehicle, the PTC element (2) being arranged between contact plates (3, 4) which serve for making electrical connection, the contact plates (3, 4) and the PTC element (2) being bonded by means of an adhesive (5), characterized in that the adhesive (5) has a resistivity of at least 50 ohms × cm and at most 500 ohms × cm.
  2. The heating assembly as claimed in claim 1, characterized in that the adhesive (5) has a resistivity of at least 80 ohms × cm and at most 150 ohms × cm, in particular of 100 ohms × cm +/-10%.
  3. The heating assembly as claimed in claim 1 or 2, characterized in that the layer thickness of the adhesive (5) between the PTC element (2) and a contact plate (3, 4) before enforced relaxation is negligible and after enforced relaxation is at most 0.02 µm, in particular 0.01 µm +/- 10%.
  4. A heating assembly with at least one PTC element, in particular for a motor vehicle, the PTC element (2) being arranged between contact plates (3, 4) which serve for making electrical connection, the contact plates (3, 4) and the PTC element (2) being bonded by means of a solder, characterized in that the solder has a resistivity of at least 50 ohms × cm and at most 500 ohms × cm.
  5. The heating assembly as claimed in claim 4, characterized in that the solder has a resistivity of at least 80 ohms × cm and at most 150 ohms × cm, in particular of 100 ohms × cm +/- 10%.
  6. The heating assembly as claimed in claim 4 or 5, characterized in that the layer thickness of the solder between the PTC element (2) and a contact plate (3, 4) before enforced relaxation is negligible and after enforced relaxation is at most 0.02 µm, in particular 0.01 µm +/- 10%.
  7. An adhesive or a solder for bonding between a ceramic PTC element (2) and an electrically conducting contact plate (3, 4), characterized in that the adhesive (5) or the solder has a resistivity of at least 50 ohms × cm and at most 500 ohms × cm.
EP03292474A 2003-10-07 2003-10-07 Heating assembly with PTC elements, particularly for motor vehicles Expired - Lifetime EP1523225B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE50312260T DE50312260D1 (en) 2003-10-07 2003-10-07 Heating arrangement with PTC element, in particular for a motor vehicle
EP03292474A EP1523225B1 (en) 2003-10-07 2003-10-07 Heating assembly with PTC elements, particularly for motor vehicles
AT03292474T ATE453306T1 (en) 2003-10-07 2003-10-07 HEATING ARRANGEMENT WITH PTC ELEMENT, PARTICULARLY FOR A MOTOR VEHICLE
JP2006529988A JP2007507384A (en) 2003-10-07 2004-09-15 Heating device especially for automobiles having a PTC element
PCT/EP2004/010328 WO2005039242A1 (en) 2003-10-07 2004-09-15 Heating assembly comprising a ptc element, in particular for a motor vehicle
CNB2004800291073A CN100488323C (en) 2003-10-07 2004-09-15 Heating assembly with PTC elements, particularly for motor vehicles
US10/574,543 US7759610B2 (en) 2003-10-07 2004-09-15 Heating assembly comprising a PTC element, in particular for a motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03292474A EP1523225B1 (en) 2003-10-07 2003-10-07 Heating assembly with PTC elements, particularly for motor vehicles

Publications (2)

Publication Number Publication Date
EP1523225A1 EP1523225A1 (en) 2005-04-13
EP1523225B1 true EP1523225B1 (en) 2009-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03292474A Expired - Lifetime EP1523225B1 (en) 2003-10-07 2003-10-07 Heating assembly with PTC elements, particularly for motor vehicles

Country Status (7)

Country Link
US (1) US7759610B2 (en)
EP (1) EP1523225B1 (en)
JP (1) JP2007507384A (en)
CN (1) CN100488323C (en)
AT (1) ATE453306T1 (en)
DE (1) DE50312260D1 (en)
WO (1) WO2005039242A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3133897A1 (en) 2015-08-18 2017-02-22 Mahle International GmbH Electric heating device and control electronics
DE102021204888A1 (en) 2021-05-12 2022-11-17 Mahle International Gmbh PTC heating element

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897744B1 (en) * 2006-02-17 2008-05-09 Valeo Systemes Thermiques HEATING ELEMENTS CHASSIS FOR AN ELECTRICAL RADIATOR OF A VENTILATION, HEATING AND / OR AIR CONDITIONING INSTALLATION.
EP2083607A1 (en) 2008-01-23 2009-07-29 Behr France Rouffach SAS Device for heating, in particular a motor vehicle
DE102010020070A1 (en) * 2010-05-09 2011-11-10 Esw Gmbh Heating module for heating flowing media and method for its preparation
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EP1523225A1 (en) 2005-04-13
US7759610B2 (en) 2010-07-20
US20070000902A1 (en) 2007-01-04
CN100488323C (en) 2009-05-13
WO2005039242A1 (en) 2005-04-28
JP2007507384A (en) 2007-03-29
ATE453306T1 (en) 2010-01-15
DE50312260D1 (en) 2010-02-04
CN1902983A (en) 2007-01-24

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