Flexible heating film of automobile battery

Abstract

The utility model discloses a flexible heating film of an automobile battery, which comprises a heating film body, the heating film body comprises an outer layer, a flexible circuit board and a bottom layer, and the outer layer comprises a nanofiber protective net and a breathable waterproof layer fixedly arranged outside the nanofiber protective net. The bottom layer comprises a conductive heating layer and insulation protection layers wrapping the upper surface and the lower surface of the conductive heating layer, a temperature sensing layer is arranged at the bottom of each insulation protection layer, a heat conduction silica gel pad is arranged at the bottom of each temperature sensing layer, and a flexible contact layer is arranged at the bottom of each heat conduction silica gel pad. The heating film is made of a flexible material, can adapt to the change of the shape of the battery, ensures tight fitting and improves the heating efficiency, and the conductive heating layer is made of a graphene nanosheet composite material which has excellent conductive and heat-conducting properties, so that the temperature of the battery can be quickly increased, and the performance of the battery in a low-temperature environment can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible heating films, in particular to a flexible heating film for automobile batteries. Background Art

[0002] With the rapid development of the electric vehicle market, demands for battery performance are becoming increasingly stringent. In particular, battery performance can significantly degrade in low-temperature environments, impacting vehicle range and service life. To address this issue, flexible heating films have emerged. These films are applied to the battery surface and utilize a conductive heating layer to generate heat, raising the battery temperature and improving performance in low-temperature environments. This technology not only enhances battery reliability and durability but also extends the range of electric vehicles, providing strong support for their widespread adoption and promotion.

[0003] The existing heating film has the following problems:

[0004] 1. Traditional heating films have insufficient heating efficiency, resulting in uneven or slow heating of the battery. Furthermore, the lack of precise temperature control can cause battery overheating, compromising battery performance or safety.

[0005] 2. Technical issues of safety and insulation protection:

[0006] The heating film may generate current leakage during operation, causing electrical safety problems. At the same time, it lacks sufficient mechanical strength protection and is susceptible to damage.

[0007] 3. Technical issues of waterproof, breathable and environmental protection:

[0008] When working in harsh environments, the heating film may be corroded by moisture, resulting in performance degradation or damage. At the same time, it needs to maintain a certain degree of air permeability to adapt to environmental changes.

[0009] 4. Technical issues of heat transfer efficiency:

[0010] The heat transfer efficiency between the heating film and the battery is not high, resulting in poor heating effect. Utility Model Content

[0011] The purpose of the present utility model is to provide a flexible heating film for a car battery, so as to solve the problems raised in the above background technology.

[0012] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a flexible heating film for an automobile battery, comprising a heating film body, wherein the heating film body comprises an outer layer, a flexible circuit board and a bottom layer, wherein the outer layer comprises a nanofiber protective net and a breathable and waterproof layer fixedly arranged on the outside of the nanofiber protective net, wherein the bottom layer comprises a conductive heating layer and an insulating protective layer coated on the upper and lower surfaces of the conductive heating layer, wherein a temperature sensing layer is provided at the bottom of the insulating protective layer, a thermally conductive silicone pad is provided at the bottom of the temperature sensing layer, and a flexible contact layer is provided at the bottom of the thermally conductive silicone pad.

[0013] A connecting belt is fixedly provided on the front side of the heating film body, and the connecting belt is electrically connected to the flexible circuit board.

[0014] The temperature sensing layer adopts an organic thin film temperature sensor, which is connected to the flexible circuit board through conductive glue or welding technology.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Flexible design: The heating film is made of flexible material, which can adapt to the changes in battery shape, ensuring a close fit and improving heating efficiency.

[0017] 2. Efficient heating: The conductive heating layer uses graphene nanosheet composite material, which has excellent electrical and thermal conductivity, can quickly increase the battery temperature and improve the battery performance in low temperature environments.

[0018] 3. Safety protection: The insulating protective layer adopts ceramic nanofiber reinforced polymer to effectively isolate the current, prevent leakage and short circuit, and ensure the safety of the heating process.

[0019] 4. Intelligent temperature control: The temperature sensing layer adopts an organic thin film temperature sensor, which can sense the temperature of the heating film in real time and transmit the signal to the control system through a flexible circuit board to achieve precise temperature control.

[0020] 5. Waterproof and breathable: The outer layer is equipped with a breathable and waterproof layer, which can prevent moisture intrusion while ensuring air circulation and extending the service life of the heating film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the utility model;

[0022] Figure 2 This is a cross-sectional view of the heating film body of the utility model;

[0023] Figure 3 This is a cross-sectional view of the outer layer, flexible circuit board and bottom layer of the utility model.

[0024] In the figure: 1. Heating film body; 2. Connecting belt; 4. Outer layer; 5. Flexible circuit board; 6. Bottom layer; 401. Nanofiber protective net; 402. Breathable and waterproof layer; 601. Conductive heating layer; 602. Insulating protective layer; 603. Temperature sensing layer; 604. Thermal conductive silicone pad; 605. Flexible contact layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3 The utility model provides a technical solution: a flexible heating film for a car battery, comprising a heating film body 1, the heating film body 1 comprising an outer layer 4, a flexible circuit board 5 and a bottom layer 6, the outer layer 4 comprising a nanofiber protective net 401 and a breathable and waterproof layer 402 fixedly arranged on the outside of the nanofiber protective net 401, the bottom layer 6 comprising a conductive heating layer 601 and an insulating protective layer 602 coated on the upper and lower surfaces of the conductive heating layer 601, a temperature sensing layer 603 being provided at the bottom of the insulating protective layer 602, a thermally conductive silicone pad 604 being provided at the bottom of the temperature sensing layer 603, and a flexible contact layer 605 being provided at the bottom of the thermally conductive silicone pad 604.

[0027] A connecting tape 2 is fixedly provided on the front side of the heating film body 1 , and the connecting tape 2 is electrically connected to the flexible circuit board 5 .

[0028] The temperature sensing layer 603 uses an organic thin film temperature sensor and is connected to the flexible circuit board 5 through conductive glue or welding technology.

[0029] The conductive heating layer 601 (graphene nanosheet composite material) is connected to the flexible circuit board 5 through conductive glue or welding technology to achieve electrical connection; at the same time, it is isolated from the upper structure by the insulating protective layer 602 to ensure safety.

[0030] The insulating protective layer 602 (ceramic nanofiber reinforced polymer) covers the conductive heating layer 601 and provides insulation and protection. It is tightly attached to the conductive heating layer 601 to prevent current leakage.

[0031] The flexible circuit board 5 (ultra-thin flexible copper foil substrate) is connected to the conductive heating layer 601 through welding or crimping technology to provide an electrical path; at the same time, it is connected to an external power supply and control system to realize control and monitoring of the heating film.

[0032] The temperature sensing layer 603 (organic thin film temperature sensor) can accurately sense the temperature of the heating film and is connected to the flexible circuit board 5 through conductive glue or welding technology to transmit the temperature signal to the control system.

[0033] The thermal conductive silicone pad 604 is located between the heating film and the battery to ensure effective heat transfer.

[0034] The nanofiber protective net 401 is tightly bonded to adjacent layers through adhesive or lamination technology to provide additional mechanical strength protection.

[0035] The breathable and waterproof layer 402 (flash-spun metamaterial) is usually located at the outermost layer or a specific protective position of the heating membrane. It is tightly bonded to the adjacent layers through adhesives to form a waterproof and breathable barrier to protect the heating membrane from the external environment.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible heating film for a car battery, comprising a heating film body (1), characterized in that: The heating film body (1) comprises an outer layer (4), a flexible circuit board (5) and a bottom layer (6), wherein the outer layer (4) comprises a nanofiber protective net (401) and a breathable waterproof layer (402) fixedly arranged on the outside of the nanofiber protective net (401), and the bottom layer (6) comprises a conductive heating layer (601) and an insulating protective layer (602) coated on the upper and lower surfaces of the conductive heating layer (601), a temperature sensing layer (603) is provided at the bottom of the insulating protective layer (602), a thermal conductive silicone pad (604) is provided at the bottom of the temperature sensing layer (603), and a flexible contact layer (605) is provided at the bottom of the thermal conductive silicone pad (604).

2. The flexible heating film for a car battery according to claim 1, characterized in that: A connecting belt (2) is fixedly provided on the front side of the heating film body (1), and the connecting belt (2) is electrically connected to the flexible circuit board (5).

3. The flexible heating film for a car battery according to claim 1, characterized in that: The temperature sensing layer (603) uses an organic thin film temperature sensor and is connected to the flexible circuit board via conductive glue or welding technology.

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