Multi-level transparent film

Abstract

Method for positioning an electrical insulation film on a component, comprising the following steps: - Providing (S1) a film of a first transparency which is coated in one region with an adhesive layer, wherein the adhesive layer is of a second transparency, wherein the first transparency is more transparent or equally transparent than the second transparency; - Positioning (S2) the film on a target area of ​​the component under visual control based on the first and second transparency, such that the film is bonded to the component in the target area.

Description

FIELD OF THE INVENTION

[0001] The invention relates to a method for positioning a film for electrical insulation on a component and a power electronics component for a vehicle. SUMMARY OF THE INVENTION

[0002] Accordingly, it is provided: - a method for positioning a film for electrical insulation on a component, comprising the following steps: providing a film of a first transparency, which is coated in one area with an adhesive layer, wherein the adhesive layer has a second transparency, wherein the first transparency is more transparent than or equally transparent to the second transparency; positioning the film on a target area of ​​the component under visual control based on the first and second transparencies, such that the film is bonded to the component in the target area; and - a power electronics component for a vehicle, comprising at least one busbar and a component with a target area in which a film of a first transparency, which is coated in one area with an adhesive layer, wherein the adhesive layer is of a second transparency, wherein the first transparency is more transparent or equally transparent as the second transparency, is glued, wherein an intermediate space filled with a filling material is formed between the busbar and the film.

[0003] The term “transparency” refers to the property of a material to allow light to pass through, allowing objects behind the material to be seen.

[0004] The first transparency describes the degree of transparency of the film. Higher transparency means the film is almost clear and causes little to no light scattering, allowing a clear view of the underlying layers.

[0005] The second transparency refers to the transparency of the adhesive layer applied to the film. The second transparency may be lower than the first, meaning the adhesive layer transmits less light and is therefore less clear than the film.

[0006] The transparency levels of the film and the adhesive layer are crucial for the precise positioning of the film on the target area of ​​the component.

[0007] The higher transparency of the film (first transparency) compared to the adhesive layer (second transparency), or alternatively, a contour of the adhesive layer, allows the user to identify and adjust the position of the adhesive layer on the film. This ensures correct alignment of the film without the need for additional markings on the film.

[0008] The term “multi-level transparency” refers to materials or layers that have different degrees of transparency.

[0009] A dome is a raised surface on a component that can serve various functions, such as assisting in the positioning and mounting of components or providing physical separation to prevent short circuits.

[0010] This application addresses the problem of precisely positioning an insulating film for electrical insulation on a component. The application offers improvements in positioning the film on a target area of ​​the component under visual control. The method enables the film to be positioned precisely and accurately on the target area to ensure optimal bonding to the component.

[0011] The use of a film with a first transparency that is more transparent or equally transparent than the second transparency of the adhesive layer enables precise positioning of the film on the component, as the user can see the underlying structures during the positioning process.

[0012] Visual inspection, enabled by the transparency levels, ensures correct alignment of the film. Visual inspection can be performed using human vision or optical aids such as cameras and image data analysis.

[0013] Thus, the invention also ensures that a film can be glued to a target area with a precise fit and without additional printed markings on the film.

[0014] Advantageous embodiments and further developments emerge from the further subclaims and from the description with reference to the figures of the drawing.

[0015] According to a preferred embodiment of the invention, the film has a projection relative to the target area. This projection serves to shorten creepage distances.

[0016] The overhang of the film relative to the target area facilitates handling and positioning of the film, as an area is available for gripping and adjusting without touching the adhesive surface.

[0017] Once applied, the excess can be used as a pull tab to make it easier to remove or reposition the film if necessary.

[0018] According to a preferred embodiment of the invention, the film is designed as a multi-level transparent film, with the first transparency being greater than the second transparency. Thus, the area of ​​the adhesive layer is clearly visible, ensuring more precise positioning of the film.

[0019] According to a preferred embodiment of the invention, the contour of the adhesive layer is visible, especially when the first transparency corresponds to the second transparency. This facilitates visual inspection and alignment of the film on the target area and ensures uniform and correct bonding.

[0020] Accordingly, an adhesive layer whose transparency is indistinguishable from the transparency of the film is an alternative to a multi-level transparent film, provided that the contour of the adhesive layer is recognizable.

[0021] It goes without saying that the contour of the adhesive layer of a multi-level transparent film is visible anyway and the following advantages can apply to both alternatives.

[0022] The visibility of the contour of the adhesive layer can also help avoid air bubbles or wrinkles during the application process.

[0023] The visible contour can serve as a quality control feature that allows the correct application of the film to be verified.

[0024] According to a preferred embodiment of the invention, the target area is located on a raised surface, such as a dome, of the component. Thus, the film is also suitable for isolating complex geometries.

[0025] By raising the target area above the surrounding surface, more effective isolation from surrounding components can be achieved.

[0026] The raised exposure of the target area can also optimize the heat dissipation from the dome of the component. TABLE OF CONTENTS OF THE DRAWINGS

[0027] The present invention will be explained in more detail below with reference to the exemplary embodiments shown in the schematic figures of the drawings. In the drawings: Fig. 1 is a schematic block diagram of an embodiment of the invention; Fig. 2 is a sectional view of a schematic diagram of an embodiment of the invention; Fig. 3 is a detailed plan view of an embodiment of the invention; Fig. 4 a schematic diagram of a film for use in an embodiment of the invention.

[0028] The accompanying drawings are intended to provide a further understanding of embodiments of the invention. They illustrate embodiments and, in conjunction with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the noted advantages will be apparent upon review of the drawings. Elements of the drawings are not necessarily shown to scale relative to one another.

[0029] In the figures of the drawings, identical, functionally identical and effective elements, features and components are provided with the same reference symbols, unless otherwise stated. DESCRIPTION OF EMBODIMENTS

[0030] Fig. 1 shows a schematic block diagram of a method for positioning an insulating film for electrical insulation on a component, comprising steps S1 and S2. In step S1, a film of a first transparency is provided, which is coated in one region with an adhesive layer, the adhesive layer being of a second transparency, the first transparency being more transparent than or equally transparent than the second transparency. In step S2, the film is positioned on a target region of the component under visual control based on the first and second transparencies, such that the film is bonded to the component in the target region.

[0031] Fig. Figure 2 shows a schematic sectional view of a power electronics component 10, comprising a busbar 1 and a component 2, which is formed as an aluminum carrier. A foil 3 is bonded to a raised, flat surface of the carrier. The foil protrudes beyond the carrier. Between the foil and the busbar 1 is a gap filled with a filler material 5 to improve heat dissipation from the busbar. The foil between the filler material and the carrier serves to provide electrical insulation and prevent creepage distances.

[0032] Fig. Figure 3 shows a schematic diagram of a component 2 with a dome 6 to which the film is adhered. The area in which the film is coated with the adhesive layer corresponds to the surface, i.e., the geometry, of the dome. The area of ​​the adhesive layer is outlined in dashed lines. The film forms an overhang opposite the dome, where the film is not coated with the adhesive layer. This is the area between the outer contour of the film, outlined in a line, and the dashed contour of the adhesive layer.

[0033] Fig.Figure 4 shows a schematic diagram of a film 3 with a first transparency, which is coated in one region with an adhesive layer 4. The adhesive layer has a second transparency, and the first transparency is more transparent than the second transparency. The region of the film not coated with the adhesive layer 4 is suitable for forming a projection 7 relative to a component to which the film 3 is applied. Reference symbol S1-S2 process steps 1 busbar 2 component 3 slides 4 adhesive layer 5 Filling material 6 Dome 7 Overhang

Claims

[1] Method for positioning an electrical insulation film on a component, comprising the following steps: - Providing (S1) a film of a first transparency which is coated in one region with an adhesive layer, wherein the adhesive layer is of a second transparency, wherein the first transparency is more transparent or equally transparent than the second transparency; - Positioning (S2) the film on a target area of ​​the component under visual control based on the first and second transparency, such that the film is bonded to the component in the target area. [2] Method according to claim 1, wherein the film has a projection relative to the target area, in which the film is in particular not coated with an adhesive layer. [3] Method according to one of the preceding claims, wherein the film is formed as a multi-level transparent film in which the first transparency is greater than the second transparency. [4] Method according to one of the preceding claims, wherein the contour of the adhesive layer is recognizable, in particular when the first transparency corresponds to the second transparency. [5] Method according to one of the preceding claims, wherein the target area is located on a raised surface of a dome (6) of the component. [6] Power electronics component (10) for a vehicle, comprising at least one busbar (1) and a component (2) with a target area in which a film (3) of a first transparency, which is coated in one area with an adhesive layer (4), wherein the adhesive layer is of a second transparency, wherein the first transparency is more transparent or equally transparent as the second transparency, is glued, wherein an intermediate space filled with a filling material (5) is formed between the busbar and the film.

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