Flexible electrothermal film leading-out terminal structure

Abstract

The utility model discloses a flexible electrothermal film leading-out terminal structure comprising a graphene electrothermal film, the graphene electrothermal film is provided with an electrode, the electrode is provided with a leading-out terminal, and the leading-out terminal is provided with a terminal. The terminal of the flexible electrothermal film leading-out terminal structure is located outside the graphene electrothermal film, so that the thickness of the graphene electrothermal film is not influenced, and the flexible electrothermal film leading-out terminal structure is more convenient to install.

Description

Technical Field

[0001] This utility model relates to a flexible electrothermal film, and more particularly to a flexible electrothermal film lead-out terminal structure. Background Art

[0002] Chinese Patent Publication No. CN219645572U, published on September 8, 2023, discloses a flexible electrothermal film electrode structure, including a controller and a heating element. The heating element includes a graphene heating pad, with two spaced-apart electrodes on its upper surface. A heating zone is formed between the two electrodes, and the two electrodes are electrically connected to the controller. The graphene heating pad in this structure is mainly made by mixing silicone / heat-resistant film-forming material with graphene and then processing it into an electrothermal film using a film-forming process. Two spaced-apart electrodes (conductive copper foil) are then attached to the electrothermal film. The electrothermal film heats up when energized. The structure of the electrothermal film can be found in [reference needed]. Figure 10 As shown, it includes a graphene electrothermal film 1, with conductive copper foil electrodes 5 on a set of opposite edges. Terminals 3 are directly welded to the conductive copper foil electrodes, or, after welding lead wires to the conductive copper foil electrodes, the terminals are connected through the outer ends of the lead wires. Ultimately, this results in an increase in the overall thickness of the electrothermal film material.

[0003] The conductive copper foil bonding consists of a copper foil and a conductive adhesive layer. The conductive adhesive layer is placed on the back of the copper foil, and the copper foil is bonded to the electrothermal film material through the conductive adhesive layer. The conductive adhesive layer generally has better adhesion to metal materials, but relatively poorer adhesion to the film material, especially at high temperatures, where the bonded surfaces are prone to peeling. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible electrothermal film lead-out terminal structure that is reasonably structured and easy to install.

[0005] The purpose of this utility model is achieved as follows:

[0006] A flexible electrothermal film lead-out terminal structure includes a graphene electrothermal film, an electrode on the graphene electrothermal film, a lead-out end on the electrode, and a terminal on the lead-out end.

[0007] The objective of this utility model can also be achieved by the following technical measures:

[0008] As a more specific embodiment, the electrode is provided in two parts, and the film segment between the two electrodes forms an electrothermal zone. The outer ends of the leads of the two electrodes are close to each other, and the terminal is disposed on the outer end of the lead.

[0009] As a further embodiment, the electrode includes a silver adhesion layer, a conductive connection layer, and a copper foil layer. The silver adhesion layer is conductively connected to the surface of the graphene electrothermal film, and the copper foil layer is connected to the surface of the silver adhesion layer through the conductive connection layer. The lead-out end is a copper foil or copper sheet and is conductively connected to the copper foil layer. The lead-out end is integrally formed, bonded, or riveted to the copper foil layer. The integral forming or riveting method can avoid the lead-out end from the solder joint of the electrode copper foil layer due to high temperature heating.

[0010] As a further embodiment, the lead-out terminal includes two copper foils, with a conductive adhesive layer on the back of each foil. One end of each foil is bonded to the copper foil layer of the electrode and the back of the graphene electrothermal film on the back of the electrode, respectively, while the remaining portions of the foils are bonded to each other. This enhances the conductivity of the copper foils and ensures good conductivity between the foils and the graphene electrothermal film, resulting in more reliable operation.

[0011] As a further embodiment, the silver adhesion layer is a silver paste adhesion layer, an electroplated silver adhesion layer, or a vapor-deposited silver adhesion layer; the conductive connection layer is a conductive adhesive bonding layer or a low-temperature solder welding layer.

[0012] As a further embodiment, the two electrodes are respectively disposed on a pair of opposite sides of the graphene electrothermal film and extend along the length direction of the edge of the graphene electrothermal film.

[0013] As a further embodiment, the graphene electrothermal film is rectangular, the lead-out end is L-shaped, and one end of each of the two electrodes in the same direction is connected to the lead-out end.

[0014] As a further option, the two electrodes are respectively located at the outer edge and center of the graphene electrothermal film.

[0015] As a further embodiment, the lead-out end is welded to the terminal on the side facing away from the graphene electrothermal film, and an insulating layer is provided on the other side of the lead-out end.

[0016] As a further embodiment, the thickness of the graphene electrothermal film is 10μm-70μm.

[0017] As a further embodiment, the width of the copper foil layer is smaller than the width of the silver adhesion layer.

[0018] The beneficial effects of the utility model are as follows:

[0019] (1) The terminals of this flexible electric heating film lead-out terminal structure are located outside the graphene electric heating film, which does not affect the thickness of the graphene electric heating film and is also easier to install.

[0020] (2) The lead-out end of this flexible electric heating film lead-out terminal structure is connected to the electrode with copper sheet or copper foil, and its structure is thinner and lighter.

[0021] (3) The silver attachment layer in the electrode of this flexible electric heating film lead-out terminal structure is made of silver material with good oxidation resistance and conductivity, and is attached to the graphene electric heating film to avoid oxidation after contact with the heated graphene electric heating film. The copper foil layer is placed on the silver attachment layer, which on the one hand better fits and on the other hand reduces the chance of oxidation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0024] Figure 3 for Figure 2 Schematic diagram of the rear structure.

[0025] Figure 4 This is a schematic diagram of another embodiment of the terminal block of this utility model.

[0026] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0027] Figure 6 for Figure 5 Enlarged structural diagram at point B.

[0028] Figure 7 This is a schematic diagram of another embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of another embodiment of the present invention.

[0030] Figure 9 for Figure 8 A cross-sectional structural diagram.

[0031] Figure 10 This is a schematic diagram of the existing technology structure. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] Example 1, see Figures 1-3 , Figure 5 and Figure 6 As shown, a flexible electrothermal film lead-out terminal structure includes a graphene electrothermal film 1, an electrode 2 is provided on the graphene electrothermal film 1, a lead-out end 21 is provided on the electrode 2, and a terminal 3 is provided on the lead-out end 21.

[0034] The electrode 2 is provided in two parts, and the membrane segment between the two electrodes 2 forms an electrothermal zone. The outer ends of the lead-out ends 21 of the two electrodes 2 are close to each other, and the terminal 3 is provided on the outer end of the lead-out end 21.

[0035] The electrode 2 includes a silver adhesion layer 22, a conductive connection layer 23, and a copper foil layer 24. The silver adhesion layer 22 is conductively connected to the surface of the graphene electrothermal film 1, and the copper foil layer 24 is connected to the surface of the silver adhesion layer 22 through the conductive connection layer 23. The lead-out end 21 is a copper foil or copper sheet and is conductively connected to the copper foil layer 24. The lead-out end 21 and the copper foil layer 24 are integrally formed.

[0036] The silver adhesion layer 22 is a silver paste adhesion layer, an electroplated silver adhesion layer, or a vapor-deposited silver adhesion layer; the conductive connection layer 23 is a conductive adhesive bonding layer or a low-temperature solder welding layer.

[0037] Two electrodes 2 are respectively disposed on a pair of opposite sides of the graphene electrothermal film 1 and extend along the length of the edge of the graphene electrothermal film 1.

[0038] The graphene electrothermal film 1 is rectangular, and the lead-out terminal 21 is L-shaped. One end of each of the two electrodes 2, facing the same direction, is connected to the lead-out terminal 21. (See also...) Figure 1 As shown, the two terminals are located on the outer side of the center of the edge of the graphene electrothermal film 1 without electrodes; see also Figure 7 As shown, the two terminals are located on the outer side of the edge end of the graphene electrothermal film 1 without electrodes; that is, the relative position of the terminal 3 and the graphene electrothermal film 1 is not fixed, and can be determined according to its application.

[0039] The lead-out end 21 is welded to the terminal 3 on the side facing away from the graphene electrothermal film 1, and an insulating layer 4 is provided on the other side of the lead-out end 21.

[0040] The thickness of the graphene electrothermal film 1 is 10μm-70μm.

[0041] The graphene electrothermal film 1 is mainly composed of a film-forming material and graphene combined to form a film, with TPU being the main film-forming material.

[0042] The width of the copper foil layer 24 is smaller than the width of the silver adhesion layer 22.

[0043] Terminal 3 is mainly for easy connection to the control circuit; its specific form is not limited. Specifically, it can be described as follows: Figure 2 For example, one end of terminal 3 is provided with a welding lug to be welded to lead-out end 21, and the other end of terminal 3 is provided with a clamp, which can be quickly connected to the insert. Figure 4 As shown, one end of terminal 3 is provided with a welding lug for welding to lead-out terminal 21, and the other end of terminal 3 is provided with a insert, which is perpendicular to the welding lug (or, the insert can also be flush with the welding lug, see...). Figure 8(As shown).

[0044] Example 2 differs from Example 1 in that: See [link to example 1] Figure 8 and 9 As shown, the graphene electrothermal film 1 is circular, and two electrodes 2 are respectively disposed at the outer edge and center of the graphene electrothermal film 1. The lead-out end of the center electrode spans the outer electrode, and its lead-out end is separated from the outer electrode and the surface of the graphene electrothermal film 1 by an insulating layer 4.

[0045] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A flexible electrothermal film lead-out terminal structure, comprising a graphene electrothermal film (1), wherein electrodes (2) are disposed on the graphene electrothermal film (1), characterized in that: The electrode (2) is provided with a lead-out end (21), and the lead-out end (21) is provided with a terminal (3); The electrode (2) is provided in two parts, and the membrane segment between the two electrodes (2) forms an electrothermal zone. The outer ends of the lead-out ends (21) of the two electrodes (2) are close to each other, and the terminal (3) is provided on the outer end of the lead-out end (21).

2. The flexible electrothermal film lead-out terminal structure according to claim 1, characterized in that: The electrode (2) includes a silver adhesion layer (22), a conductive connection layer (23) and a copper foil layer (24). The silver adhesion layer (22) is electrically connected to the surface of the graphene electrothermal film (1), and the copper foil layer (24) is connected to the surface of the silver adhesion layer (22) through the conductive connection layer (23). The lead-out end (21) is a copper foil or copper sheet and is electrically connected to the copper foil layer (24). The lead-out end (21) is integrally formed, bonded or riveted to the copper foil layer (24).

3. The flexible electrothermal film lead-out terminal structure according to claim 2, characterized in that: The lead-out end (21) includes two copper foils. The back of the two copper foils is provided with a conductive adhesive bonding layer. One end of the two copper foils is bonded to the copper foil layer (24) of the electrode (2) and the back of the graphene electrothermal film (1) on the back of the electrode (2), respectively. The other positions of the two copper foils are bonded to each other.

4. The flexible electrothermal film lead-out terminal structure according to claim 2, characterized in that: The silver adhesion layer (22) is a silver paste adhesion layer, an electroplated silver adhesion layer, or a vapor-deposited silver adhesion layer; the conductive connection layer (23) is a conductive adhesive bonding layer or a low-temperature solder welding layer; the thickness of the graphene electrothermal film (1) is 10μm-70μm.

5. The flexible electrothermal film lead-out terminal structure according to claim 1, characterized in that: Two electrodes (2) are respectively disposed on a pair of opposite sides of the graphene electrothermal film (1) and extend along the length of the edge of the graphene electrothermal film (1).

6. The flexible electrothermal film lead-out terminal structure according to claim 5, characterized in that: The graphene electrothermal film (1) is rectangular, the lead-out end (21) is L-shaped, and one end of each of the two electrodes (2) in the same direction is connected to the lead-out end (21).

7. The flexible electrothermal film lead-out terminal structure according to claim 1, characterized in that: Two electrodes (2) are respectively located at the outer edge and center of the graphene electrothermal film (1).

8. The flexible electrothermal film lead-out terminal structure according to claim 1, characterized in that: The lead-out end (21) is welded to the terminal (3) on the side facing away from the graphene electrothermal film (1), and an insulating layer (4) is provided on the other side of the lead-out end (21).

9. The flexible electrothermal film lead-out terminal structure according to claim 2, characterized in that: The width of the copper foil layer (24) is smaller than the width of the silver adhesion layer (22).

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