Flexible electrothermal film electrode structure

Abstract

The utility model discloses a flexible electrothermal film electrode structure, which comprises a graphene electrothermal film, at least two electrodes are arranged on the graphene electrothermal film, an electrothermal area is formed by a film section between every two electrodes, and each electrode comprises an oxidation-resistant conductive adhesion layer and a power supply access conductive layer. And the power supply access conductive layer and the oxidation-resistant conductive adhesion layer are attached through a conductive glue layer or welded through a low-temperature solder layer. According to the flexible electrothermal film electrode structure, the oxidation-resistant conductive material is attached to the graphene electrothermal film, oxidation after contact with the heating graphene electrothermal film is avoided, the power supply access conductive layer is arranged on the oxidation-resistant conductive adhesive layer, on one hand, better attachment is achieved, on the other hand, the oxidation probability is reduced, and meanwhile, the service life of the flexible electrothermal film electrode structure is prolonged. The power supply access conducting layer can be made of better welding materials, so that a leading-out terminal or a wiring terminal can be conveniently connected, and the application capability of the electrothermal film is improved.

Description

Technical Field

[0001] This utility model relates to a flexible heating film, and more particularly to a flexible electrothermal film electrode structure. Background Technology

[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, and two spaced-apart electrodes are provided on the upper surface of the graphene heating pad. A heating zone is formed between the two electrodes, and the two electrodes are electrically connected to the controller. The graphene heating pad of this structure is mainly made of a mixture of silicone / heat-resistant film-forming material and graphene, which is then processed into an electrothermal film material using a film-forming process. Then, two spaced-apart electrodes (conductive copper foil) are attached to the electrothermal film material. When the electrodes are energized, the electrothermal film material heats up.

[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 electrode structure that is reasonably structured, easy to lead out and connect, and reliable in operation.

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

[0006] A flexible electrothermal film electrode structure includes a graphene electrothermal film with at least two electrodes. The film segment between each pair of electrodes forms an electrothermal region. The electrodes include an oxidation-resistant conductive adhesion layer and a power supply conductive layer. The power supply conductive layer and the oxidation-resistant conductive adhesion layer are bonded together by a conductive adhesive layer or welded by a low-temperature solder layer.

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

[0008] As a more specific solution, the oxidation-resistant conductive coating is a silver paste layer or a silver-plated layer, which significantly improves oxidation resistance, conductivity, and adhesion.

[0009] As a further option, the power supply conductive layer is a copper foil layer or a copper sheet layer.

[0010] As a further embodiment, the thickness of the graphene electrothermal film is 10μm-70μm.

[0011] As a further embodiment, the electrodes are provided in pairs, each disposed on a pair of opposite edges of the graphene electrothermal film and extending along the length of the graphene electrothermal film's edge. Even if delamination occurs locally in the conductive layer where the power supply is connected, it will not affect the performance of supplying power to the graphene electrothermal film along its length.

[0012] As a further embodiment, the electrodes are provided in two locations, respectively positioned at the outer edge and center of the graphene electrothermal film.

[0013] As a further embodiment, both electrodes are located on the same side surface of the graphene electrothermal film; or, the two electrodes are located on opposite sides of the graphene electrothermal film; or, both electrodes are located simultaneously on opposite sides of the graphene electrothermal film.

[0014] As a further embodiment, the width of the power supply conductive layer is smaller than the width of the oxidation-resistant conductive adhesion layer.

[0015] The beneficial effects of this utility model are as follows:

[0016] This flexible electrothermal film electrode structure uses an oxidation-resistant conductive material attached to the graphene electrothermal film to avoid oxidation after contact with the heated graphene electrothermal film. The power supply conductive layer is located on the oxidation-resistant conductive attachment layer, which not only provides better adhesion but also reduces the chance of oxidation. At the same time, since the power supply conductive layer can be made of materials that are easier to weld, it is convenient to connect the lead-out end or wiring end, thus improving the application capabilities of the electrothermal film. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure.

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point C.

[0020] Figure 4 for Figure 1 Schematic diagram of the BB cross-section structure.

[0021] Figure 5 for Figure 4 A schematic diagram of the structure in which the power supply is connected to the conductive layer in a partially delaminated state.

[0022] Figure 6 This is a schematic diagram of another embodiment (circular) of the present invention.

[0023] Figure 7 for Figure 6A schematic diagram of the EE cross-sectional structure.

[0024] Figure 8 This is a schematic diagram of another embodiment of the present invention.

[0025] Figure 9 This is a schematic diagram of another embodiment of the present utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] See Figures 1 to 4 As shown, a flexible electrothermal film electrode structure includes a graphene electrothermal film 1, two electrodes 2 on the graphene electrothermal film 1, and an electrothermal region formed by the film segment between each pair of electrodes 2. The electrode 2 includes an oxidation-resistant conductive adhesion layer 21 and a power supply conductive layer 23, and the power supply conductive layer 23 and the oxidation-resistant conductive adhesion layer 21 are bonded together by a conductive adhesive layer 22.

[0028] The oxidation-resistant conductive adhesion layer 21 is a silver paste layer or a silver plating layer, wherein the silver plating layer can be attached by electroplating or vapor deposition.

[0029] The power supply conductive layer 23 is a copper foil layer.

[0030] The width of the power supply conductive layer 23 is smaller than the width of the oxidation-resistant conductive adhesion layer 21.

[0031] The thickness of the graphene electrothermal film 1 is 10μm-70μm. The graphene electrothermal film 1 is mainly formed by combining film-forming materials and graphene into a film shape. The film-forming material is mainly TPU.

[0032] The graphene electrothermal film 1 is rectangular, and the electrodes 2 are two in number, each disposed on a pair of opposite sides of the graphene electrothermal film 1 and extending along the length of the edge of the graphene electrothermal film 1. Alternatively, see [link to relevant documentation]. Figure 6 and Figure 7 As shown, the graphene electrothermal film 1 is circular, and the electrode 2 is provided in two parts, which are respectively located at the outer edge and the center of the graphene electrothermal film 1.

[0033] See Figure 2 As shown, both electrodes 2 are located on the same side surface of the graphene electrothermal film 1; or, see... Figure 8 As shown, the two electrodes 2 are located on opposite sides of the graphene electrothermal film 1; or, see... Figure 9 As shown, both electrodes 2 are located on both sides of the graphene electrothermal film 1.

[0034] 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 electrode structure, comprising a graphene electrothermal film (1), wherein at least two electrodes (2) are provided on the graphene electrothermal film (1), and an electrothermal region is formed between each pair of electrodes (2), characterized in that: The electrode (2) includes an oxidation-resistant conductive adhesion layer (21) and a power access conductive layer (23). The power access conductive layer (23) and the oxidation-resistant conductive adhesion layer (21) are bonded together by a conductive adhesive layer (22) or welded by a low-temperature solder layer.

2. The flexible electrothermal film electrode structure according to claim 1, characterized in that: The oxidation-resistant conductive coating layer (21) is a silver paste layer or a silver plating layer.

3. The flexible electrothermal film electrode structure according to claim 1, characterized in that: The power supply access conductive layer (23) is a copper foil layer or a copper sheet layer.

4. The flexible electrothermal film electrode structure according to claim 1, characterized in that: The thickness of the graphene electrothermal film (1) is 10μm-70μm.

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

6. The flexible electrothermal film electrode structure according to claim 1, characterized in that: The electrode (2) is provided in two parts and is respectively located at the outer edge and center of the graphene electrothermal film (1).

7. The flexible electrothermal film electrode structure according to claim 1, characterized in that: Both electrodes (2) are located on the same side surface of the graphene electrothermal film (1); or, the two electrodes (2) are located on the two sides surface of the graphene electrothermal film (1) respectively; or, both electrodes (2) are located on the two sides surface of the graphene electrothermal film (1) at the same time.

8. The flexible electrothermal film electrode structure according to claim 1, characterized in that: The width of the power supply conductive layer (23) is smaller than the width of the oxidation-resistant conductive adhesion layer (21).

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