A device with photovoltaic power generation and friction power generation functions

Abstract

The present invention provides a device with photovoltaic power generation and friction power generation functions, including a solar cell, the solar cell including a first transparent conductive film located on the upper layer thereof, the device also including a friction layer and a second transparent conductive film that can allow light to pass through and can be bent and deformed, the friction layer is located above the first transparent conductive film, the second transparent conductive film covers the upper surface of the friction layer, the device has a first state and a second state, in the first state, the friction layer is bent and in contact with the first transparent conductive film; in the second state, the friction layer is separated from the first transparent conductive film. The device with photovoltaic power generation and friction power generation functions of the present invention can generate electricity on both sunny and rainy days, can make full use of the kinetic energy of raindrops, and has a higher power generation power.

Description

Technical Field

[0001] The invention belongs to the field of photovoltaic power generation, and in particular relates to a device with photovoltaic power generation and friction power generation functions. Background Art

[0002] Solar energy is an inexhaustible renewable energy source for human beings. It is also a clean energy source that does not cause any environmental pollution. Solar photovoltaic technology is the fastest-growing and most dynamic research field in recent years, and is one of the most watched projects. For this reason, people have studied and developed solar cells. Solar cells convert solar energy into electrical energy, and the actual power generation is greatly affected by the weather, especially on rainy days, when the power generation is so low that it can be ignored. At the same time, if the power generation is only carried out by the contact between the electric charge carried by the raindrops in the process of falling and the friction layer, the amount of charge carried by a single raindrop is usually constant, which will cause the problem of insufficient power generation and low power generation. Summary of the invention

[0003] In view of the above problems, the object of the present invention is to provide a device with photovoltaic power generation and friction power generation functions, which can generate electricity on both sunny and rainy days and has a higher power generation capacity.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A device with photovoltaic power generation and friction power generation functions, including a solar cell, the solar cell including a first transparent conductive film located on the upper layer thereof, the device also including a friction layer and a second transparent conductive film that can allow light to pass through and can bend and deform, the friction layer is located above the first transparent conductive film, and the second transparent conductive film is covered on the upper surface of the friction layer. The device has a first state and a second state. In the first state, the friction layer is bent and in contact with the first transparent conductive film; in the second state, the friction layer is separated from the first transparent conductive film.

[0006] In one embodiment, the material of the friction layer is selected from polytetrafluoroethylene, polyperfluoroethylene propylene, polydimethylsiloxane, polyimide, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine formaldehyde, cellulose, cellulose acetate, regenerated cellulose sponge, polyurethane elastomer, styrene propylene copolymer, styrene-acrylonitrile copolymer, styrene butadiene copolymer, wool and its fabrics, silk and its fabrics, paper, artificial fiber, cotton and its fabrics, wood, hard rubber, polyvinyl alcohol, polyester, polyisobutylene, polyvinyl butyral, phenolic resin, chloroprene rubber, butadiene propylene copolymer, natural rubber, polyacrylonitrile, poly(vinylidene chloride-co-acrylonitrile), polyethylene polypropylene carbonate, polystyrene, liquid crystal polymer, polychloroprene, polyacrylonitrile, acetate, polychloroether, polychlorotrifluoroethylene, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, and parylene. One or more combinations thereof.

[0007] In one embodiment, the friction layer is a polydimethylsiloxane film.

[0008] In one embodiment, the device further comprises a transparent protective film which allows light to pass through and can be bent and deformed, and the transparent protective film is coated on the upper surface of the friction layer.

[0009] In one embodiment, the transparent protective film is a PET base film.

[0010] In one embodiment, the device further comprises a spacer disposed between the friction layer and the first transparent conductive film.

[0011] In a preferred embodiment, the edge of the friction layer is arranged on the spacer, the edge of the first transparent conductive film is arranged on the spacer, and there is a space in the middle of the spacer or between multiple spacers that allows the friction layer to enter and contact the first transparent conductive film.

[0012] In one embodiment, the solar cell further includes P-type amorphous silicon, first intrinsic amorphous silicon, N-type crystalline silicon, second intrinsic amorphous silicon, N-type amorphous silicon and a third transparent conductive film stacked from top to bottom, and the first transparent conductive film is covered on the upper surface of the P-type amorphous silicon.

[0013] In one embodiment, the upper surface of the first transparent conductive film is a velvet surface.

[0014] In one embodiment, the solar cell further includes a third transparent conductive film located at a lower layer thereof; the first transparent conductive film, the second transparent conductive film and the third transparent conductive film are all ITO films.

[0015] In one embodiment, the solar cell further includes P-type amorphous silicon, first intrinsic amorphous silicon, N-type crystalline silicon, second intrinsic amorphous silicon, N-type amorphous silicon and a third transparent conductive film, and the device further includes a transparent protective film; the device further includes the transparent protective film, the second transparent conductive film, the friction layer, the first transparent conductive film, the P-type amorphous silicon, the first intrinsic amorphous silicon, the N-type crystalline silicon, the second intrinsic amorphous silicon, the N-type amorphous silicon and the third transparent conductive film arranged in sequence from top to bottom, the friction layer is located above the first transparent conductive film, the friction layer is a PDMS film, and the PDMS film and the first transparent conductive film are separated by a plurality of spacers, and a space is formed between the plurality of spacers to allow the friction layer to enter and contact the first transparent conductive film.

[0016] The present invention adopts the above technical solution, which has the following advantages compared with the prior art:

[0017] The present invention provides a device with photovoltaic power generation and friction power generation functions, comprising a friction layer and a first transparent conductive film that can contact and separate from each other, and the device has a first state and a second state. When in the first state, raindrops fall onto the device, and the friction layer and the first transparent conductive film contact each other. When in the second state, raindrops leave the device, and the friction layer and the first transparent conductive film separate from each other. The process of multiple contacts and separations generates a potential difference between the second transparent conductive film and the first transparent conductive film through electrostatic induction, and electric energy can be output externally. The output power of friction power generation is determined by the mass of a single raindrop, the falling speed, and even the contact angle with the device. Different raindrops have different kinetic energies, and the output power of friction power generation is also different. Therefore, the device can fully utilize the kinetic energy of raindrops to generate electricity; it can generate electricity on both sunny and rainy days, and fully utilizes the kinetic energy of raindrops, and has a higher output power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 This is a schematic structural diagram of a device with photovoltaic power generation and friction power generation functions according to an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the spacer.

[0021] in,

[0022] 1. Transparent protective film; 2. Second transparent conductive film; 3. Friction layer; 4. Spacer; 5. First transparent conductive film; 6. P-type amorphous silicon; 71. First intrinsic amorphous silicon; 72. Second intrinsic amorphous silicon; 8. N-type amorphous silicon; 9. Third transparent conductive film; 10. N-type crystalline silicon; 11. Raindrops. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] As shown in the present invention, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The term "and / or" used herein includes any combination of one or more related listed items.

[0026] Reference Figure 1 As shown, this embodiment provides a device with photovoltaic power generation and friction power generation functions, including a solar cell, and the solar cell is specifically a HJT cell. The HJT cell includes a first transparent conductive film 5, a P-type amorphous silicon 6, a first intrinsic amorphous silicon 71, an N-type crystalline silicon 10, a second intrinsic amorphous silicon 72, an N-type amorphous silicon 8 and a third transparent conductive film 9 stacked in sequence from top to bottom, and the first transparent conductive film 5 is covered on the upper surface of the P-type amorphous silicon 6.

[0027] The device also includes a transparent protective film 1, a second transparent conductive film 2 and a friction layer 3 stacked from top to bottom. The transparent protective film 1, the second transparent conductive film 2 and the friction layer 3 can allow light to pass through and can be bent and deformed. The friction layer 3 is located above the first transparent conductive film 5, and the two are parallel to each other and spaced apart. Figure 2As shown, there is a spacer 4 between the friction layer 3 and the first transparent conductive film 5 so that the friction layer 3 and the first transparent conductive film 5 are spaced apart. The spacer 4 can be a frame-shaped member, or there can be multiple spacers 4 and they are located at the edge of the device. Specifically in this embodiment, the spacer 4 is two parallel and oppositely arranged strip-shaped members, and there is a space between the spacers 4 that allows the friction layer 3 to enter and contact the first transparent conductive film 5. The edge of the friction layer 3 is fixed on the upper surface of the spacer 4, and the edge of the first transparent conductive film 5 is fixed on the lower surface of the spacer 4.

[0028] The transparent protective film 1 is a PET base film with high permeability, and the friction layer 3 is a high molecular polymer friction layer. Specifically in this embodiment, the friction layer 3 is a polydimethylsiloxane (PDMS) film. In some other embodiments, the material of the friction layer 3 can also be selected from polytetrafluoroethylene, polyperfluoroethylene propylene, polydimethylsiloxane, polyimide, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine formaldehyde, cellulose, cellulose acetate, regenerated cellulose sponge, polyurethane elastomer, styrene propylene copolymer, styrene-acrylonitrile copolymer, styrene Butadiene copolymer, wool and its fabric, silk and its fabric, paper, artificial fiber, cotton and its fabric, wood, hard rubber, polyvinyl alcohol, polyester, polyisobutylene, polyvinyl butyral, phenolic resin, chloroprene rubber, butadiene propylene copolymer, natural rubber, polyacrylonitrile, poly(vinylidene chloride-co-acrylonitrile), polyethylene propylene carbonate, polystyrene, liquid crystal polymer, polychloroprene, polyacrylonitrile, acetate, polychloroether, polychlorotrifluoroethylene, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, parylene or a combination of one or more thereof. The films made of the above materials are all flexible and have a stronger electron-acquiring ability than transparent conductive films.

[0029] The first transparent conductive film 5 , the second transparent conductive film 2 and the third transparent conductive film 9 are all indium tin oxide semiconductor (ITO) transparent conductive films, which are both conductive and have good transmittance.

[0030] The working principle of a device with photovoltaic power generation and friction power generation functions in this embodiment is as follows:

[0031] When the weather is clear, the device performs photovoltaic power generation. Sunlight can pass through the transparent protective film 1, the second transparent conductive film 2 and the friction layer 3 to illuminate the HJT solar cell, and the HJT solar cell converts solar energy into electrical energy.

[0032] When it is raining, the device has a first state and a second state. In the first state, the raindrop 11 falls until it hits the soft transparent protective film 1, the transparent protective film 1, the friction layer 3 and the second transparent conductive film 2 bend toward the first transparent conductive film 5, the friction layer 3 and the first transparent conductive film 5 contact and rub, and the friction layer 3 is charged with static electricity; in the second state, the raindrop 11 separates from the transparent protective film 1, the transparent protective film 1 restores its initial state due to its own elasticity, and the friction layer 3 separates from the first transparent conductive film 5. When the rain keeps falling, the device will continuously cycle the above-mentioned first state and second state, the friction layer 3 and the first transparent conductive film 5 repeatedly contact and separate, and under the action of electrostatic induction, a potential difference is generated between the first transparent conductive film 5 and the second transparent conductive film 2, and electrical energy can be output to the outside, thereby converting the mechanical energy of the raindrop 11 into kinetic energy. Moreover, the upper surface of the first transparent conductive film 5 is velvet, and this design can greatly increase the contact area between the friction layer 3 and the first transparent conductive film 5, thereby increasing the charge density of the static charge carried by the friction layer 3, and further increasing the output power of triboelectric power generation. In this embodiment, the output power of friction power generation is also related to the mass of a single raindrop 11, the falling speed and even the contact angle with the device. The device can fully utilize the kinetic energy of the raindrop 11 to generate electricity.

[0033] The device of this embodiment has photovoltaic power generation and friction power generation functions, and has a friction layer 3 and a first transparent conductive film 5 that can contact and separate from each other. When a raindrop 11 falls on the device, the friction layer 3 and the first transparent conductive film 5 contact and rub against each other. When the raindrop 11 leaves the device, the friction layer 3 and the first transparent conductive film 5 separate. The multiple contact and separation processes generate a potential difference between the second transparent conductive film 2 and the first transparent conductive film 5 through electrostatic induction, and can output electrical energy to the outside. The output power of friction power generation is determined by the mass of a single raindrop 11, the falling speed, and even the contact angle with the device. Different raindrops 11 have different kinetic energies, and the output power of friction power generation is also different. Therefore, this device can make full use of the kinetic energy of raindrops 11 to generate electricity; this device can generate electricity on both sunny and rainy days; at the same time, the first transparent conductive film 5 is both the front electrode of the solar cell and the back electrode of the friction power generation device, that is, the solar cell and the friction power generation device share a common electrode, which can make the device have a higher degree of integration, reduce the volume occupied by components, have a compact structure, and reduce costs; the device in this embodiment adopts a dual-electrode working mode, and the power generation efficiency of the dual-electrode working mode is significantly higher than that of the single-electrode working mode.

[0034] The above embodiment is only for illustrating the technical concept and features of the present invention, and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention.

Claims

1. A device with photovoltaic power generation and friction power generation functions, comprising a solar cell, wherein the solar cell comprises a first transparent conductive film located on the upper layer thereof, wherein the upper surface of the first transparent conductive film is a velvet surface, characterized in that: The device also includes a friction layer that allows light to pass through and can be bent and deformed, and a second transparent conductive film, the friction layer is located above the first transparent conductive film, and the second transparent conductive film covers the upper surface of the friction layer. The device has a first state and a second state. In the first state, the friction layer is bent and in contact with the first transparent conductive film; in the second state, the friction layer is separated from the first transparent conductive film; the device also includes a transparent protective film that allows light to pass through and can be bent and deformed, and the transparent protective film is a PET base film; the solar cell also includes P-type amorphous silicon, a first intrinsic amorphous silicon, N-type crystalline silicon, second intrinsic amorphous silicon, N-type amorphous silicon and a third transparent conductive film; the transparent protective film, the second transparent conductive film, the friction layer, the first transparent conductive film, the P-type amorphous silicon, the first intrinsic amorphous silicon, the N-type crystalline silicon, the second intrinsic amorphous silicon, the N-type amorphous silicon and the third transparent conductive film are arranged in sequence from top to bottom, the friction layer is a PDMS film, and the PDMS film and the first transparent conductive film are separated by a plurality of spacers, and a space is formed between the plurality of spacers to allow the friction layer to enter and contact the first transparent conductive film.

2. The device according to claim 1, characterized in that The material of the friction layer is selected from polytetrafluoroethylene, polyperfluoroethylene propylene, polydimethylsiloxane, polyimide, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine formaldehyde, cellulose, cellulose acetate, regenerated cellulose sponge, polyurethane elastomer, styrene propylene copolymer, styrene-acrylonitrile copolymer, styrene butadiene copolymer, wool and its fabrics, silk and its fabrics, paper, artificial fiber, cotton and its fabrics, wood, hard rubber, polyvinyl alcohol, polyester, polyisobutylene, polyvinyl butyral, phenolic resin, chloroprene rubber, butadiene propylene copolymer, natural rubber, polyacrylonitrile, poly(vinylidene chloride-co-acrylonitrile), polyethylene polypropylene carbonate, polystyrene, liquid crystal polymer, polychloroprene, polyacrylonitrile, acetate, polychloroether, polychlorotrifluoroethylene, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, and parylene. One or more combinations thereof.

3. The device according to claim 2, characterized in that The friction layer is a polydimethylsiloxane film.

4. The device according to claim 1, characterized in that The edge of the friction layer is arranged on the spacer, the edge of the first transparent conductive film is arranged on the spacer, and there is a space in the middle of the spacer or between the plurality of spacers to allow the friction layer to enter and contact the first transparent conductive film.

5. The device according to claim 1, characterized in that The solar cell further comprises a third transparent conductive film located at a lower layer thereof; the first transparent conductive film, the second transparent conductive film and the third transparent conductive film are all ITO films.

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