ELECTRICAL HEATING DEVICE, IN PARTICULAR FOR MOBILE APPLICATIONS

Abstract

An electric heating device, in particular for mobile applications, having a substrate and a heat conductor layer formed on the substrate. The heat conductor layer is interrupted by at least a first isolating interruption, the first isolating interruption separating at least a first and a second layer portion of the heat conductor layer from one another. The first layer portion is connected at a first end to a first terminal, for example positive pole, and the second layer portion is connected at a first end to a second terminal, for example negative pole. The first layer portion is connected at a second end to the second layer portion and is connected via this second layer portion to the second terminal.

Claims

1. Electric heating device, in particular for mobile applications, with: a substrate and a heat conductor layer formed on the substrate, wherein the heat conductor layer is interrupted by at least a first isolating interruption, wherein the first isolating interruption separates at least a first and a second layer portion of the heat conductor layer from each other, wherein the first layer portion is connected at a first end to a first terminal, and the second layer portion is connected at a first end to a second terminal, wherein the first layer portion is connected at a second end to the second layer portion and is connected via this second layer portion to the second terminal.

2. Electric heating device according to claim 1, wherein the heat conductor layer is interrupted by at least a second isolating interruption, wherein the second isolating interruption separates a third and the second layer portion of the heat conductor layer from each other, wherein the third layer portion is connected at a first end to the first terminal.

3. Electric heating device according to claim 1, wherein the first and second layer portions are at least partially connected to each other by a first separate conductor.

4. Electric heating device according to claim 1, wherein a second separate conductor, is at least partially associated with the first and second terminal.

5. Electric heating device according to claim 1, wherein the first and second terminal are arranged on the same side of the heat conductor layer.

6. Electric heating device according to claim 1, at least one isolating interruption is at least substantially straight.

7. Electric heating device according to claim 1, wherein the heat conductor layer and/or the first and/or the second and/or the third layer portion thereof is/are at least substantially rectangular.

8. Electric heating device according to claim 1, wherein the heat conductor layer covers at least 80% of a substrate surface, and/or an electrically insulating material is arranged in the particular isolating interruption and/or at least one further insulating layer is formed on the heat conductor layer.

9. Electric heating device according to claim 1, wherein the second layer portion is wider than the first and/or third layer portion.

10. Electric heating device according to claim 1, wherein two or more heating circuits are formed.

11. Electric heating device according to claim 1, wherein at least one isolating interruption passes through the heat conductor layer from a first to a second side thereof.

12. Electric heating device according to claim 1, wherein the electric heating device is a motor vehicle heating device.

13. Vehicle, in particular motor vehicle, comprising an electric heating device according to claim 1.

14. Method for producing an electric heating device according to claim 1, wherein at least one isolating interruption is produced by laser structuring and/or masking of at least one masking portion when applying the heating layer and/or an elongate body which is introduced during production and is later removed again, and/or at least one terminal strip, and/or at least one connection strip, are thermally sprayed and/or are connected to at least one contact pad.

15. Electric heating device according to claim 1, wherein the first terminal is a positive pole and the second terminal is a negative pole.

16. Electric heating device according to claim 3, wherein the first separate conductor is an unstructured conductive strip.

17. Electric heating device according to claim 4, wherein the second separate conductor is a strip divided into at least two separate strip portions by at least one terminal isolating interruption.

18. Electric heating device according to claim 9, wherein the second layer portion is wider than the first and/or third layer portion by a factor of 1.2.

19. Electric heating device according to claim 9, wherein the second layer portion is wider than the first and/or third layer portion by a factor of 1.5.

20. Electric heating device according to claim 1, wherein the heat conductor layer covers at least 85% of a substrate surface.

Description

[0059] In the following, the is described on the basis of an exemplary embodiment, which is explained in more detail with reference to the drawings. In the drawings:

[0060] FIG. 1 shows a schematic plan view of an electric heating device according to the invention.

[0061] In the following description, the same reference numerals are used for like and similarly acting parts.

[0062] FIG. 1 shows a schematic plan view of a heating device according to the invention.

[0063] This has a heat conductor layer 12, which can be arranged on a substrate (not shown). The heat conductor layer 12 is divided into a first layer portion 15, a second layer portion 16 and a third layer portion 17 by isolating interruptions 13, 14. The isolating interruptions 13, 14 separate the corresponding layer portions 15, 16 or 16, 17 (completely) from each other. Overall, however, the layer portions 15 to 17 are not completely separated from each other, but are connected (electrically conductively) to each other via a metallic strip 18 (copper strip).

[0064] Opposite the strip 18, a second strip (terminal strip) 19 is arranged (in particular metallic, preferably comprising copper). The terminal strip 19 has terminal isolating interruptions 20, 21 which continue the isolating interruptions 13, 14 (respectively). This divides the strip 19 into three strip portions 22, 23, 24. The strip portions 23, 24 are in turn connected to each other with a first pole (in particular positive pole). The strip portion 23 is connected to a second pole (for example negative pole). Contact pads (e.g. comprising copper) 25, 26, 27 are also provided for electrical connection.

[0065] A first heating circuit 36 is formed by first layer portion 15 and second layer portion 16. A second heating circuit 37 is formed by third layer portion 17 and second layer portion (common layer portion) 16.

[0066] The strip 18 preferably has no interruptions (isolating interruptions).

[0067] The strip 18 and/or the strip 19 preferably extend (at least substantially) perpendicular to the layer portions 15, 16, 17.

[0068] Specifically, a first end 28 of the first layer portion 15 is connected to a first terminal 29 (or first pole 29, e.g. positive pole, in particular HV+). Similarly, a first end 30 of the third layer portion 17 is connected to the first terminal (pole) 29. A second end 31 of the first layer portion 15 and a second end 32 of the third layer portion 17 are each connected (via the strip 18) to a second end 33 of the second layer portion 16. A first end 34 of the second layer portion 16 is connected to a second terminal 35 (second pole, e.g. negative pole, in particular HV−).

[0069] In this sense, a particular terminal (this applies here in particular to the terminal 29) does not have to be formed integrally or coherently.

[0070] It should be noted at this juncture that all the parts described above, considered on their own and in any combination, in particular the details shown in the drawings, are claimed as embodiments of the invention. Modifications thereof are possible.

REFERENCE SIGNS

[0071] 12 heat conductor layer [0072] 13 isolating interruption [0073] 14 isolating interruption [0074] 15 first layer portion [0075] 16 second layer portion [0076] 17 third layer portion [0077] 18 (connecting) strip [0078] 19 (terminal) strip [0079] 20 terminal isolating interruption [0080] 21 terminal isolating interruption [0081] 22 strip portion [0082] 23 strip portion [0083] 24 strip portion [0084] 25 contact pad [0085] 26 contact pad [0086] 27 contact pad [0087] 28 first end of 15 [0088] 29 first terminal [0089] 30 first end of 17 [0090] 31 second end of 15 [0091] 32 second end of 17 [0092] 33 second end of 16 [0093] 34 first end of 16 [0094] 35 second terminal [0095] 36 first heating circuit [0096] 37 second heating circuit