Portable multi-layer combined heating film for household lithium battery

Abstract

The utility model provides a portable multi-layer combined heating film for a household lithium battery, and aims to solve the problem that a traditional integrated heating film is insufficient in flexibility and individuation requirements in household use. The heating film comprises a heating element layer, and nickel-chromium alloy metal wires which are distributed in a staggered mode are arranged on the heating element layer so as to achieve uniform heating and ensure heat resistance. The silica gel material layers are arranged on the two sides of the heating element layer to serve as insulating layers, and use safety is guaranteed. And the other side of the insulating layer is provided with the supporting layer composed of the glass fiber cloth and the epoxy resin mixed layer, so that the mechanical strength and the heat resistance are enhanced. The heating film is sleeved with the outer frame, the supporting plate is arranged on the inner side, and the overall stability is enhanced. In addition, one side of the supporting layer far away from the insulating layer is coated with a polyimide film as a protective layer, so that durability and adaptability are improved.

Description

Technical Field

[0001] This utility model provides a combined heating film, belonging to the field of household lithium battery technology, and particularly relates to a portable multi-layer combined heating film for household lithium batteries. Background Technology

[0002] Lithium battery heating film is a flexible thin film material used for battery temperature management. It converts electrical energy into heat energy through the principle of electrothermal conversion, uniformly heating the lithium battery to keep it within a suitable operating temperature range, thereby improving battery performance and safety.

[0003] Most existing heating films are designed and manufactured as a single unit. While this design facilitates battery pack assembly and installation for home use, offers some adaptability to battery cells of varying thicknesses, and meets the requirements for battery pack reinforcement and mass production consistency, this integrated design may limit its flexibility and suitability for personalized needs in a home environment. Home users may require customization or adjustments based on different usage scenarios and needs. Furthermore, the integrated design may make maintenance and replacement of heating films in home use more complex than modular or modular designs, which are more flexible and convenient. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides a portable multi-layer composite heating film for household lithium batteries, which solves the problem of insufficient flexibility and personalization of traditional integrated heating films in home use.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a portable multi-layer combined heating film for household lithium batteries, including a heating element layer, on which resistance wires are arranged in an interlaced manner, an insulating layer is provided on both sides of the heating element layer, a support layer is provided on the side of the insulating layer away from the heating element layer, and an outer frame is fitted around the heating element layer.

[0006] Preferably, the side of the support layer away from the insulating layer is coated with a protective layer.

[0007] Preferably, the resistance wire is a nickel-chromium alloy wire.

[0008] Preferably, the insulating layer is a silicone material layer, and the supporting layer is a mixture of glass fiber cloth and epoxy resin.

[0009] Preferably, the protective layer is a polyimide film, and a support plate corresponding to the heating film is provided on the inner side of the outer frame.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0011] This invention provides a portable, multi-layered, modular heating film for household lithium batteries, addressing the limitations of traditional integrated heating films in terms of flexibility and personalization for home use. The heating film includes a heating element layer with interlaced resistance wires, allowing for uniform heat distribution and improved heating efficiency. Insulation layers are located on both sides of the heating element layer, ensuring the film's safety and protecting the heating element from short circuits and damage. A support layer is located on the side of the insulation layer facing away from the heating element layer, providing necessary structural support and ensuring the film's stability and durability in various environments. Furthermore, an outer frame surrounds the heating element layer, enhancing the overall structure and facilitating installation and removal as needed, thus improving portability and applicability. This modular and modular design allows users to select different specifications of heating film or replace components as required, enabling personalized customization and flexible use of the heating film. This design is particularly suitable for home environments because home users may need to adjust the heating film according to different usage scenarios and needs, and the heating film provided by this invention can well meet these needs.

[0012] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of a portable multi-layer combined heating film for household lithium batteries according to the present invention.

[0014] Figure 2 This is an exploded view of a portable multi-layer combined heating film for household lithium batteries according to this utility model.

[0015] As shown in the figure:

[0016] 1. Heating element layer; 2. Resistance wire; 3. Insulation layer; 4. Support layer; 5. Outer frame; 6. Protective layer; 7. Support plate. Detailed Implementation

[0017] 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.

[0018] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figure 1 and Figure 2 As shown, a portable multi-layer composite heating film for household lithium batteries includes a heating element layer 1. The heating element layer 1 has interleaved resistance wires 2, which are made of nickel-chromium alloy metal wire, possessing high resistivity and good heat resistance. Silicone material layers 3 are provided on both sides of the heating element layer 1 as insulation layers, effectively preventing current leakage and ensuring safe use. A support layer 4 is provided on the side of the insulation layer 3 facing away from the heating element layer 1. This support layer 4 is composed of a mixture of fiberglass cloth and epoxy resin, providing sufficient mechanical strength and heat resistance to ensure the stability of the heating film in various environments. An outer frame 5 is fitted around the heating element layer 1, and a support plate 7 corresponding to the heating film is provided inside the outer frame 5 to enhance the overall structural stability.

[0021] In this embodiment, the design of the heating film fully considers the convenience and safety needs of home users. By using nickel-chromium alloy wire as the resistance wire 2, the heating film achieves excellent heat resistance and stable heating effect, while its staggered distribution helps to achieve uniform heating of the film surface. The silicone material layer 3, as an insulating layer, not only provides good electrical insulation but also has excellent flexibility and high-temperature resistance, enabling the heating film to maintain stable operation under different temperature conditions. The fiberglass cloth and epoxy resin hybrid structure of the support layer 4 enhances the mechanical strength of the heating film, allowing it to withstand certain physical pressure without deformation, while also improving the heat resistance and ensuring reliability for long-term use. The outer frame 5 not only provides additional protection for the heating film but also enhances its overall stability through the inner support plate 7, making the heating film more stable during installation and use, and less prone to displacement or deformation. Furthermore, the outer frame 5 design also considers portability, making the heating film easy to carry and store, suitable for diverse usage scenarios of home users.

[0022] like Figure 1 and Figure 2 As shown, the portable multi-layer composite heating film for household lithium batteries also includes a protective layer 6 coated on the side of the support layer 4 away from the insulating layer 3. This protective layer 6 is a polyimide film with good heat resistance and chemical stability, further protecting the support layer 4 from external environmental influences. This design makes the heating film not only highly efficient in heating but also durable and safe, suitable for home use, and easy to carry and install.

[0023] In this embodiment, the addition of the protective layer 6 to the portable multi-layer composite heating film for household lithium batteries significantly improves the durability and adaptability of the heating film. Polyimide film, as a high-performance engineering plastic, has a heat resistance exceeding 300°C and excellent chemical stability. This allows the heating film to maintain its performance unaffected by high temperatures, humidity, or other harsh conditions that may be encountered in a home environment. Furthermore, the protective layer 6 effectively prevents physical damage to the support layer 4, such as scratches or abrasions, thereby extending the service life of the heating film.

[0024] In use, this portable multi-layer composite heating film for household lithium batteries achieves self-configuration and convenient assembly through a carefully designed outer frame 5 and support plates 7. The outer frame 5 is made of lightweight and durable materials, such as aluminum alloy or plastic, and its structural design takes into account the size and shape of the heating film, ensuring that the heating film can be securely embedded within it. The inner side of the outer frame 5 is provided with support plates 7 corresponding to the heating film 1. These support plates 7 not only provide additional support for the heating film but also ensure the correct positioning of the heating film within the frame, preventing displacement during use.

[0025] The outer frame 5 is designed to allow users to select heating films of different sizes or shapes as needed, enabling custom combinations. Users can choose a heating film of a suitable size based on their lithium battery size or heating requirements, and then place it into the outer frame 5. The support plate 7 ensures a tight fit between the heating film and the outer frame 5, keeping the heating film fixed within the frame and facilitating assembly by the user.

[0026] During assembly, the user simply places the heating film 1 inside the outer frame 5, ensuring the resistance wire 2 and the support layer 4 are correctly aligned, and then secures the heating film to the support plate 7 using simple fasteners such as clips or screws. This design simplifies the assembly process, allowing even users without professional skills to easily assemble and disassemble the heating film.

[0027] In summary, through the ingenious design of the outer frame 5 and the support plate 7, this utility model achieves self-configurable combination and convenient assembly of the heating film, improving the portability, ease of use and adaptability of the heating film, and meeting the diverse needs of household users for lithium battery heating films.

[0028] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A portable multi-layer combined heating film for household lithium batteries comprising a heating element layer (1), characterized in that: The heating element layer (1) is provided with resistance wires (2) staggered with each other, both sides of the heating element layer (1) are provided with insulating layers (3) correspondingly, the side of the insulating layer (3) away from the heating element layer (1) is provided with a support layer (4), and the outer part of the heating element layer (1) is sleeved with an outer frame (5).

2. A portable multi-layered combined heating film for household lithium batteries according to claim 1, characterized in that: The side of the support layer (4) away from the insulating layer (3) is coated with a protective layer (6).

3. A portable multi-layered combined heating film for household lithium batteries according to claim 1, characterized in that: The resistance wire (2) is a nickel-chromium alloy wire.

4. A portable multi-layered combined heating film for household lithium batteries according to claim 1, characterized in that: The insulating layer (3) is a silica gel material layer, and the support layer (4) is a mixed layer of glass fiber cloth and epoxy resin.

5. A portable multi-layered combined heating film for household lithium batteries according to claim 2, characterized in that: The protective layer (6) is a polyimide film, and the inner side of the outer frame (5) is provided with a support plate (7) corresponding to the heating film.

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