Heat-generating element and method for its production

Patent metadata

Field	Value
Publication number	US-11943846-B2
Application number	US-202016905209-A
Country	US
Kind code	B2
Filing date	Jun 18, 2020
Priority date	Jun 19, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A method for the production of a heat-generating element includes placing in which at least two electrical conductor elements, provided with through holes, onto a film provided with an adhesive mass, pressing the conductor elements against the films such that the mass is forced into the through holes. At least one PTC element is subsequently placed onto one of the conductor elements, and then the other of the conductor elements, together with the film adhering thereto, is placed opposite to the one of the conductor elements onto the PTC element. The invention further relates to a heat-generating element with a PTC element and electrical conductor elements connected thereto in an electrically conductive manner for energizing the PTC element with a different polarity and an electrical insulation that is provided on the outer side thereof with a film and an adhesive mass applied thereto. At least one of the conductor elements is provided with through holes and the mass is at least in part contained in the plane of the conductor element.

First claim

We claim:

1. A method for producing a heat-generating element, comprising:
placing at least two electrical conductor elements onto a film provided with an adhesive mass, wherein the conductor elements are provided with through holes and support points;
pressing the electrical conductor elements against the film such that the mass is forced into the through holes such that the conductor elements are pressed into the mass, so that the support points of the conductor elements lie approximately at approximately a same height as an outer surface of the mass;
subsequently placing at least one PTC element onto one of the conductor elements; then placing the other of the conductor elements, together with the film, opposite to the one of the conductor elements onto the PTC element; and
disposing a rod onto the mass at an end side of the PTC element and between the at least two conductor elements.

2. The method according to claim 1 , wherein the mass is pressed through at least one of the conductor elements when the conductor element is pressed onto the film so that the mass is provided on a side of the film that is disposed opposite to the conductor element.

3. The method according to claim 1 , wherein at least two conductor elements are placed one behind the other onto a continuous film, and wherein the other of the conductor elements is placed onto the PTC element by folding the film over onto the PTC element.

4. The method according to claim 1 , further comprising, after placement of the other of the conductor elements onto the PTC element, pressing together a layer structure including the film layers with the mass, the conductor elements, and the PTC element provided therebetween.

5. The method according to claim 1 , wherein the mass is a plastic mass which is applied over a surface onto the films and which is set with a Shore-A hardness of between 25 and 40 for placement of the conductor elements.

6. The method according to claim 1 , wherein the mass is a cross-linking plastic mass which is pre-cross-linked prior to the placement of the conductor elements to the PTC element.

7. The method according to claim 6 , wherein the mass is finally cross-linked by using an external pressure and increased temperature after the placement of the other of the conductor elements, together with the film adhering thereto, onto the PTC element.

8. A heat-generating element comprising:
a PTC element;
electrical conductor elements connected to the PTC element in an electrically conductive manner for energizing the PTC element with different polarities;
an electrical insulation that is provided on an outer side of the PTC element with a film and an adhesive mass applied to the conductor elements prior to providing the electrical insulation on the outer side of the PTC element, wherein at least one of the conductor elements is provided with through holes and support points that lie at a same height as an outer surface of the mass; and
a rod disposed against an end side of the PTC element.

9. The heat-generating element according to claim 8 , wherein the mass is provided on a surface of the conductor element directly in contact with the PTC element.

Assignees

• Eberspaecher Catem Gmbh & Co

Inventors

• Walz Kurt
• Niederer Michael

Classifications

• H05B3/286 Primary

  the insulating material being an organic material, e.g. plastic · CPC title

• B29C65/4835

  Heat curing adhesives · CPC title

• B29C66/47

  Joining single elements to sheets, plates or other substantially flat surfaces (B29C66/5326 takes precedence) · CPC title

• B29L2031/779

  Heating equipment · CPC title

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title