Film type heating film power supply structure

Abstract

The utility model discloses a film type heating film power supply structure, comprising a transparent heating film, two sides of the transparent heating film are respectively provided with a plurality of conductive electrodes, the conductive electrodes are provided with contact electrodes, and the contact electrodes are provided with power transmission lines and are connected with a power supply through the power transmission lines; a temperature sensor is arranged on the surface of the transparent heating film; the contact electrode comprises a welding point, a nickel sheet and a conductive adhesive; the power transmission line is welded on the front surface of the nickel sheet with a proper size, and then the back surface of the nickel sheet is bonded with the conductive electrode on the transparent heating film by using the conductive adhesive, so that stable power supply can be realized. Meanwhile, the thermistor is attached to the surface of the transparent heating film, and the surface temperature is prevented from being too high. The power supply structure can effectively solve the problem that a contact point of a traditional heating film is burnt out, the nickel sheet is small in resistance, and surface welding is convenient; the conductive adhesive is small in resistance, resistant to high temperature and high in viscidity, and the nickel sheet can be well bound to the surface of the transparent heating film.

Description

Technical Field

[0001] The utility model relates to the technical field of heating films, and more specifically, to a power supply structure for a thin-film heating film. Background Art

[0002] Transparent heating films have attracted widespread attention due to their excellent performance. They are mainly composed of transparent electrode materials such as copper metal grids, silver nanowires, ITO, graphene, and carbon nanotubes. These materials are generally very thin, with thicknesses ranging from a few hundred nanometers to tens of microns.

[0003] During use, current needs to flow through the entire surface of the heating film. Transparent heating films generally have very low resistance, usually only in the single digits, or even lower. In this case, when the voltage is applied and the power is turned on, the greater the resistance of the connection between the power supply and the heating film, including the wires and contact points, the lower the partial pressure of the heating film itself, and the lower the heating power. And when the area of ​​the heating film increases proportionally (the aspect ratio remains unchanged), its resistance value generally does not change, so the power under the same voltage will not change, so the power per unit area will also decrease, and the temperature that can be achieved in actual use will also decrease. Therefore, if you want to achieve the same surface temperature, you need a greater heating power, that is, a greater voltage and current.

[0004] Under high current conditions, the highest point on the surface of large-scale heating films is often the contact point. If the temperature is too high, the contact point will burn out, making the heating film unable to operate normally. Therefore, how to power it has become an urgent problem to be solved in the field of heating film technology. Utility Model Content

[0005] The present invention provides a power supply structure for a thin-film heating film to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power supply structure for a thin-film heating film, comprising a transparent heating film, a plurality of conductive electrodes provided on both sides of the transparent heating film, contact electrodes provided on the conductive electrodes, power transmission lines provided on the contact electrodes and connected to a power source via the power transmission lines; a temperature sensor provided on the surface of the transparent heating film; the contact electrodes comprising a welding point, a nickel sheet, and a conductive adhesive; the welding point is provided on the front surface of the nickel sheet, the power transmission line is connected to the welding point; the conductive adhesive is provided on the back surface of the nickel sheet, and the nickel sheet is bonded to the conductive electrode via the conductive adhesive.

[0006] Preferably, the shape of the nickel sheet and the shape of the welding point are both rectangular, and the length direction of the nickel sheet and the length direction of the welding point are perpendicular to each other.

[0007] Preferably, the temperature sensor is a thermistor, the thermistor is attached to the surface of the transparent heating film, and the thermistor is used to detect the surface temperature of the transparent heating film.

[0008] Preferably, the size of the nickel sheet is matched with the width of the conductive electrode, and a plurality of nickel sheets are arranged side by side on the side of the transparent heating film; gaps are provided between adjacent nickel sheets, and the distances between them are the same.

[0009] Preferably, the conductive adhesive is any one of ACF, non-woven double-sided conductive adhesive, silver paste, carbon paste or substrate-free conductive adhesive.

[0010] Preferably, the power supply is provided with a temperature control switch, and the temperature control switch is used to adjust the temperature and operating current of the transparent heating film.

[0011] Preferably, an alarm device connected to the temperature sensor is further included, and the alarm device is used to issue a reminder to the outside.

[0012] Preferably, the alarm device is an audible alarm, a light alarm or a buzzer alarm.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention has a reasonable design and a simple structure. By selecting a nickel sheet of appropriate size, welding a power transmission line to the front, and then using conductive glue to bond the back of the nickel sheet to the conductive electrode on the transparent heating film, a stable power supply can be achieved. At the same time, a thermistor is attached to the surface of the transparent heating film to prevent the surface temperature from being too high. The power supply structure of the present invention can effectively solve the problem of traditional heating film contact point burnout. The nickel sheet has low resistance and is easy to weld on the surface. The conductive glue has low resistance, high temperature resistance and strong viscosity, which can effectively bind the nickel sheet to the surface of the transparent heating film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the power supply structure of the thin-film heating film according to an embodiment of the present utility model;

[0015] Figure 2 This is a front view of the power supply structure of the thin-film heating film according to an embodiment of the present invention;

[0016] exist Figure 1 and Figure 2 , the corresponding relationship between the names of the components and the accompanying drawing numbers is as follows:

[0017] 1--Transparent heating film, 2--Contact electrode, 21--Welding point, 22--Nickel sheet, 23--Conductive adhesive, 3--Transmission line, 4--Temperature sensor. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are further described in detail with reference to the accompanying drawings and examples. The accompanying drawings are for reference only and are not intended to limit the scope of the present invention. The following examples are intended to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] Please refer to Figure 1 and Figure 2 The utility model provides a power supply structure for a thin-film heating film, comprising a transparent heating film 1, a plurality of conductive electrodes being respectively provided on both sides of the transparent heating film 1, a contact electrode 2 being provided on the conductive electrode, a power transmission line 3 being provided on the contact electrode 2 and connected to a power source through the power transmission line 3; a temperature sensor 4 being provided on the surface of the transparent heating film 1; the contact electrode 2 comprising a welding point 21, a nickel sheet 22 and a conductive adhesive 23; the welding point 21 being provided on the front surface of the nickel sheet 22, the power transmission line 3 being connected to the welding point 21; the conductive adhesive 23 being provided on the back surface of the nickel sheet 22, the nickel sheet 22 being bonded and connected to the conductive electrode through the conductive adhesive 23.

[0022] In the embodiment of the present invention, the surface of the transparent heating film 1 is generally rough and does not have suitable welding sites. To this end, the conductive electrodes of the transparent heating film 1 are arranged on both sides of the entire film, and contact electrodes 2 with matching sizes are arranged at the end points of each conductive electrode. The main body of the contact electrode 2 is a nickel sheet 22, and a welding point 21 is set on the front of the nickel sheet 22. One end of the power transmission line 3 is connected through the welding point 21, and the other end of the power transmission line 3 is connected to the power supply. Conductive glue 23 is set on the back of the nickel sheet 22, and the conductive electrode is adhered by the conductive glue 23 to form a conductive structure, so that the power transmission line 3 can supply power to the transparent heating film 1 through the nickel sheet 22 and the conductive glue 23. Since the contact area between the conductive electrode of the transparent heating film 1 and the contact electrode 2 is large, it can adapt to larger currents and voltages, thereby avoiding the occurrence of contact point burnout.

[0023] The working process of this utility model is as follows:

[0024] Power is supplied via a power line 3, one end of which is welded to a welding point 21 on a nickel sheet 22. Conductive adhesive 23 connects the nickel sheet 22 to the conductive electrode, allowing electrical energy to be transmitted to the transparent heating film 1 via the conductive electrode, thereby powering the transparent heating film 1. Simultaneously, a temperature sensor 4 is attached to the surface of the transparent heating film 1 to prevent the surface temperature from being too high.

[0025] The manufacturing process of this embodiment is as follows: first, the power transmission line 3 is welded to the front of a nickel sheet 22 of appropriate size (depending on the width of the conductive electrode of the transparent heating film 1), then the conductive glue 23 is applied / cured / hot-pressed on the back, and finally, several nickel sheets 22 are glued to the surface of the transparent heating film 1 at the same distance.

[0026] Preferably, the nickel sheet 22 and the welding point 21 are both rectangular in shape, with the length of the nickel sheet 22 perpendicular to the length of the welding point 21. In this embodiment, the nickel sheet 22 is in the shape of a long rectangular strip, providing a large contact surface with the conductive electrode, and is capable of adapting to high current and high voltage operating conditions. The welding point 21 on the nickel sheet 22 is also in the shape of a long rectangular strip, providing a large contact surface with the power transmission line 3, further reducing the risk of burnout at the connection.

[0027] Preferably, the temperature sensor 4 is a thermistor attached to the surface of the transparent heating film 1 and used to detect the surface temperature of the transparent heating film 1. In this embodiment, by attaching the thermistor to the surface of the transparent heating film 1, installation is simple and cost-effective, and the surface temperature of the transparent heating film 1 can be effectively monitored to prevent excessive temperatures. Furthermore, multiple thermistors can be provided, each located at different locations on the transparent heating film 1, to improve monitoring accuracy.

[0028] Preferably, the size of the nickel sheet 22 is matched with the width of the conductive electrode, and multiple nickel sheets 22 are arranged side by side on the side of the transparent heating film 1; gaps are provided between adjacent nickel sheets 22, and the distances between them are the same.

[0029] Preferably, the conductive adhesive 23 is any one of ACF, non-woven double-sided conductive adhesive 23, silver paste, carbon paste, or substrate-free conductive adhesive 23. In this embodiment, the conductive adhesive 23 can be of various types, and any adhesive having low resistance, high temperature resistance, and strong adhesion is sufficient to bind the nickel sheet 22 to the surface of the transparent heating film 1.

[0030] Preferably, the power supply is provided with a temperature control switch, which is used to adjust the temperature and operating current of the transparent heating film 1. In this embodiment, the temperature control switch can regulate the temperature and current of the entire transparent heating film 1 to avoid overheating and burning the heating film or excessive current and burning the power supply.

[0031] Preferably, an alarm device connected to the temperature sensor 4 is also included, and the alarm device is used to issue an external reminder. In this embodiment, the temperature sensor 4 is used to monitor the surface temperature of the transparent heating film 1. When the temperature is too high, the temperature sensor 4 sends a signal to the alarm device, and the alarm device immediately issues an external reminder.

[0032] Preferably, the alarm device is an audible alarm, a light alarm or a buzzer alarm.

[0033] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention has a reasonable design and a simple structure. By selecting a nickel sheet of appropriate size, welding a power transmission line to the front, and then using conductive glue to bond the back of the nickel sheet to the conductive electrode on the transparent heating film, a stable power supply can be achieved. At the same time, a thermistor is attached to the surface of the transparent heating film to prevent the surface temperature from being too high. The power supply structure of the present invention can effectively solve the problem of traditional heating film contact point burnout. The nickel sheet has low resistance and is easy to weld on the surface. The conductive glue has low resistance, high temperature resistance and strong viscosity, which can effectively bind the nickel sheet to the surface of the transparent heating film.

[0034] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A thin film heating film power supply structure, characterized in that: The invention comprises a transparent heating film (1), a plurality of conductive electrodes are respectively provided on both sides of the transparent heating film, a contact electrode (2) is provided on the conductive electrode, a power transmission line (3) is provided on the contact electrode and connected to a power source via the power transmission line; a temperature sensor (4) is provided on the surface of the transparent heating film; the contact electrode comprises a welding point (21), a nickel sheet (22) and a conductive adhesive (23); the welding point is provided on the front side of the nickel sheet, and the power transmission line is connected to the welding point; the conductive adhesive is provided on the back side of the nickel sheet, and the nickel sheet is bonded and connected to the conductive electrode via the conductive adhesive.

2. The thin film heating film power supply structure according to claim 1, characterized in that: The shape of the nickel sheet and the shape of the welding point are both rectangular, and the length direction of the nickel sheet and the length direction of the welding point are perpendicular to each other.

3. The thin film heating film power supply structure according to claim 1, characterized in that: The temperature sensor is a thermistor, which is attached to the surface of the transparent heating film and is used to detect the surface temperature of the transparent heating film.

4. The thin film heating film power supply structure according to claim 1, characterized in that: The size of the nickel sheet is matched with the width of the conductive electrode, and a plurality of nickel sheets are arranged side by side on the side of the transparent heating film; gaps are provided between adjacent nickel sheets, and the distances between them are the same.

5. The thin film heating film power supply structure according to claim 1, characterized in that: The conductive adhesive is any one of ACF, non-woven double-sided conductive adhesive, silver paste, carbon paste or substrate-free conductive adhesive.

6. The thin film heating film power supply structure according to claim 1, characterized in that: The power supply is provided with a temperature control switch, and the temperature control switch is used to adjust the temperature and working current of the transparent heating film.

7. The thin film heating film power supply structure according to any one of claims 1 to 6, characterized in that: The system also includes an alarm device connected to the temperature sensor, and the alarm device is used to issue an external reminder.

8. The thin film heating film power supply structure according to claim 7, characterized in that: The alarm device is an audible alarm, a light alarm or a buzzer alarm.

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