Composite battery heating film

Abstract

The utility model discloses a kind of composite battery heating films, including substrate layer, the top of substrate layer is fixedly connected with conductive heating layer, the top of conductive heating layer is fixedly connected with insulating layer, the top of insulating layer is fixedly connected with basic heat conduction layer, the top of basic heat conduction layer is fixedly connected with temperature sensing layer, the top of temperature sensing layer is fixedly connected with electromagnetic shielding layer, the top of electromagnetic shielding layer is fixedly connected with high heat conduction polymer layer, the inside of basic heat conduction layer is provided with carbon-based heating layer, carbon-based heating layer cooperates heat conduction layer and uses, the top of carbon-based heating layer is fixedly connected with heat conduction adhesive layer, heat conduction adhesive layer cooperates carbon-based heating layer and uses.The utility model battery heating film has changed the phenomenon that traditional in humid environment heat conductivity is bad, has been adopted basic heat conduction layer and high heat conduction polymer layer and carries out heat conduction strengthening processing, just can make its heat conduction performance further, increase the overall heat conduction effect.

Description

Technical Field

[0001] This utility model relates to the field of battery heating film technology, specifically a composite battery heating film. Background Technology

[0002] Battery heating film is a functional thin film used to regulate battery temperature, and it is commonly used in new energy vehicles, energy storage systems, consumer electronics and other fields.

[0003] According to a patent published on the China Patent Network, the patent title is "Battery Heating Film and Battery Module," and the patent application number is 202222713253.6. It uses a positive temperature coefficient thermistor material as the heating material for the heating layer. When the battery heating film is energized, the heating layer generates heat through the thermal effect of the current, thereby heating the battery cell. As the temperature of the heating layer increases, its resistance increases accordingly, and the current flowing through the heating layer decreases accordingly. When the resistance of the heating layer increases to a certain value (such as the preset value required to heat the battery cell), the current flowing through the heating layer approaches... When the current is 0, it is equivalent to the heating layer itself being de-energized. Therefore, the heating layer, which has no current flowing through it, no longer generates heat, and thus the heating temperature of the battery cell by the battery heating film will not continue to rise. This allows for automatic temperature control of the battery heating film. In this embodiment, there is no need to control the heating temperature through a control circuit, which simplifies the internal structure of the battery module and makes the process of controlling the heating temperature simpler and more reliable. However, the battery heating film mentioned above has poor thermal conductivity. In a relatively humid environment, water molecules form a heat insulation layer between the film and the battery, which hinders heat conduction and affects its thermal conductivity.

[0004] Therefore, the battery heating film needs to be redesigned to effectively prevent its poor thermal conductivity. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a composite battery heating film that has the advantage of increasing thermal conductivity, thus solving the problem of poor thermal conductivity.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a composite battery heating film, comprising a substrate layer, a conductive heating layer fixedly connected to the top of the substrate layer, an insulating layer fixedly connected to the top of the conductive heating layer, a basic thermally conductive layer fixedly connected to the top of the insulating layer, a temperature sensing layer fixedly connected to the top of the basic thermally conductive layer, an electromagnetic shielding layer fixedly connected to the top of the temperature sensing layer, and a high thermal conductivity polymer layer fixedly connected to the top of the electromagnetic shielding layer.

[0007] As a preferred embodiment of this invention, a carbon-based heating layer is provided inside the basic heat-conducting layer, and the carbon-based heating layer is used in conjunction with the basic heat-conducting layer.

[0008] As a preferred embodiment of this invention, a thermally conductive adhesive layer is fixedly connected to the top of the carbon-based heating layer, and the thermally conductive adhesive layer is used in conjunction with the carbon-based heating layer.

[0009] As a preferred embodiment of this invention, a boron nitride coating is fixedly connected to the top of the thermally conductive adhesive layer, and the boron nitride coating is used in conjunction with the thermally conductive adhesive layer.

[0010] As a preferred embodiment of the present invention, an epoxy resin layer is disposed inside the high thermal conductivity polymer layer, and a boron nitride layer is fixedly connected to the top of the epoxy resin layer.

[0011] In a preferred embodiment of this invention, a graphene layer is fixedly connected to the top of the boron nitride layer, and the graphene layer is used in conjunction with the boron nitride layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model of battery heating film changes the traditional phenomenon of poor thermal conductivity in humid environments. It adopts a basic thermally conductive layer and a high thermal conductivity polymer layer for enhanced thermal conductivity, which can further improve its thermal conductivity and increase the overall thermal conductivity effect.

[0014] 2. This utility model, through the setting of a carbon-based heating layer, can quickly preheat in low-temperature environments, allowing heat to be quickly transferred to the battery surface.

[0015] 3. By setting a thermally conductive adhesive layer, this utility model can ensure that the thermal conductivity can be evenly covered on its top, thereby increasing the overall thermal conductivity.

[0016] 4. By setting a boron nitride coating, this utility model can effectively isolate the heating film circuit from the battery electrodes, avoiding the risk of short circuit.

[0017] 5. By setting an epoxy resin layer, this utility model can effectively isolate the heating film circuit from the battery electrodes, and at the same time reduce high-frequency signal interference.

[0018] 6. By setting a graphene layer, this utility model can significantly improve heating efficiency, thermal conductivity uniformity and system lightweighting, and can quickly transfer heat from the heating layer to the entire battery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the basic heat-conducting layer of this utility model;

[0021] Figure 3This is a cross-sectional view of the high thermal conductivity polymer layer of this utility model;

[0022] Figure 4 This is an exploded view of the structure of this utility model.

[0023] In the diagram: 1. Substrate layer; 2. Conductive heating layer; 3. Insulating layer; 4. Basic thermally conductive layer; 5. Temperature sensing layer; 6. Electromagnetic shielding layer; 7. High thermal conductivity polymer layer; 8. Carbon-based heating layer; 9. Thermally conductive adhesive layer; 10. Boron nitride coating; 11. Epoxy resin layer; 12. Boron nitride layer; 13. Graphene layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 4 As shown, the present invention provides a composite battery heating film, comprising a substrate layer 1, a conductive heating layer 2 fixedly connected to the top of the substrate layer 1, an insulating layer 3 fixedly connected to the top of the conductive heating layer 2, a basic thermally conductive layer 4 fixedly connected to the top of the insulating layer 3, a temperature sensing layer 5 fixedly connected to the top of the basic thermally conductive layer 4, an electromagnetic shielding layer 6 fixedly connected to the top of the temperature sensing layer 5, and a high thermal conductivity polymer layer 7 fixedly connected to the top of the electromagnetic shielding layer 6.

[0026] refer to Figure 2 The base heat-conducting layer 4 has a carbon-based heating layer 8 inside, which is used in conjunction with the base heat-conducting layer 4.

[0027] As a technical optimization of this utility model, the carbon-based heating layer 8 enables rapid preheating in low-temperature environments, allowing heat to be quickly transferred to the battery surface.

[0028] refer to Figure 2 A thermally conductive adhesive layer 9 is fixedly connected to the top of the carbon-based heating layer 8, and the thermally conductive adhesive layer 9 is used in conjunction with the carbon-based heating layer 8.

[0029] As a technical optimization of this utility model, by setting the thermally conductive adhesive layer 9, the thermal conductivity can be evenly covered on its top, thereby increasing the overall thermal conductivity.

[0030] refer to Figure 2 A boron nitride coating 10 is fixedly connected to the top of the thermally conductive adhesive layer 9, and the boron nitride coating 10 is used in conjunction with the thermally conductive adhesive layer 9.

[0031] As a technical optimization of this utility model, the boron nitride coating 10 can effectively isolate the heating film circuit from the battery electrodes, avoiding the risk of short circuit.

[0032] refer to Figure 3 An epoxy resin layer 11 is disposed inside the high thermal conductivity polymer layer 7, and a boron nitride layer 12 is fixedly connected to the top of the epoxy resin layer 11.

[0033] As a technical optimization of this utility model, the epoxy resin layer 11 can effectively isolate the heating film circuit from the battery electrodes, while also reducing high-frequency signal interference.

[0034] refer to Figure 3 A graphene layer 13 is fixedly connected to the top of the boron nitride layer 12, and the graphene layer 13 is used in conjunction with the boron nitride layer 12.

[0035] As a technical optimization of this utility model, the graphene layer 13 can significantly improve heating efficiency, thermal conductivity uniformity and system lightweighting, and can quickly transfer heat from the heating layer to the entire battery.

[0036] The working principle and usage process of this utility model are as follows: First, heat is conducted through the carbon-based heating layer 8, the thermally conductive adhesive layer 9, and the boron nitride coating layer 10 inside the basic thermally conductive layer 4. Then, the heat is transferred to the interior of the high thermal conductivity polymer layer 7, and then the epoxy resin layer 11, the boron nitride layer 12, and the graphene layer 13 inside it conduct heat a second time, so that the heat can be fully covered on the surface of the battery, thereby increasing the thermal conductivity.

[0037] In summary, this composite battery heating film overcomes the traditional problem of poor thermal conductivity in humid environments by employing a basic thermally conductive layer 4 and a high thermal conductivity polymer layer 7 for enhanced thermal conductivity, thereby further improving its thermal conductivity and increasing the overall thermal conductivity effect.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite battery heating film, comprising a substrate layer (1), characterized in that: A conductive heating layer (2) is fixedly connected to the top of the substrate layer (1), an insulating layer (3) is fixedly connected to the top of the conductive heating layer (2), a basic thermally conductive layer (4) is fixedly connected to the top of the insulating layer (3), a temperature sensing layer (5) is fixedly connected to the top of the basic thermally conductive layer (4), an electromagnetic shielding layer (6) is fixedly connected to the top of the temperature sensing layer (5), and a high thermal conductivity polymer layer (7) is fixedly connected to the top of the electromagnetic shielding layer (6).

2. The composite battery heating film according to claim 1, characterized in that: The basic heat-conducting layer (4) has a carbon-based heating layer (8) inside, which is used in conjunction with the basic heat-conducting layer (4).

3. The composite battery heating film according to claim 2, characterized in that: A thermally conductive adhesive layer (9) is fixedly connected to the top of the carbon-based heating layer (8), and the thermally conductive adhesive layer (9) is used in conjunction with the carbon-based heating layer (8).

4. The composite battery heating film according to claim 3, characterized in that: A boron nitride coating (10) is fixedly connected to the top of the thermally conductive adhesive layer (9), and the boron nitride coating (10) is used in conjunction with the thermally conductive adhesive layer (9).

5. The composite battery heating film according to claim 1, characterized in that: An epoxy resin layer (11) is disposed inside the high thermal conductivity polymer layer (7), and a boron nitride layer (12) is fixedly connected to the top of the epoxy resin layer (11).

6. The composite battery heating film according to claim 5, characterized in that: A graphene layer (13) is fixedly connected to the top of the boron nitride layer (12), and the graphene layer (13) is used in conjunction with the boron nitride layer (12).

Images