CN221862797U - Photovoltaic power generation components and photovoltaic power generation assemblies - Google Patents

Abstract

The utility model discloses a photovoltaic power generation assembly and a photovoltaic power generation assembly, wherein the photovoltaic power generation assembly comprises: the photovoltaic panel and refraction cover, the refraction cover covers and is established the light receiving area of photovoltaic panel, the refraction cover is the printing opacity material component, the refraction cover deviates from the dustcoat face of photovoltaic panel is smooth structure, the refraction cover is facing towards the interior cover face of photovoltaic panel is equipped with the concave-convex structure that is used for spotlight. When the photovoltaic device works, light which cannot be irradiated onto the photovoltaic panel originally can be refracted onto the photovoltaic panel through the concave-convex structure of the refraction cover, so that the light receiving area and the total light receiving amount of the photovoltaic panel are increased, and the photovoltaic power generation efficiency is improved; compared with the prior art, the transformation cost of the photovoltaic power generation assembly is relatively low, extra energy is not required to be consumed during use, and the photovoltaic power generation assembly has good economic benefit and is very suitable for popularization to the commercial field.

Description

Photovoltaic power generation components and photovoltaic power generation assemblies

Technical Field

The utility model relates to the field of new energy, in particular to a photovoltaic power generation component and a photovoltaic power generation assembly.

Background Art

In recent years, concerns about ecological issues have set off a new round of energy revolution in the world. Since solar energy is a clean, pollution-free, renewable energy that is inexhaustible, the full development and utilization of solar energy can not only save increasingly depleted fossil energy and alleviate the severe resource shortage problem, but also reduce pollution and protect the ecological environment.

At present, the most representative technology for the use of solar energy is photovoltaic power generation. Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. It mainly consists of three parts: solar panels, controllers and inverters. After solar cells are connected in series and packaged for protection, they can form large-area solar cell modules, which are then combined with power controllers and other components to form photovoltaic power generation devices.

Although photovoltaic power generation has many advantages, its drawbacks are also obvious, namely, it requires sufficient sunlight and has a low energy conversion rate. The issue of how to obtain sufficient sunlight is not only related to the geographical location of the photovoltaic power station, but also closely related to the angle of incidence of the sun. Since most photovoltaic panels are installed at a fixed tilt angle, when the angle of incidence of the sun changes, the light-receiving area of the photovoltaic panel will also change, causing its power generation to fluctuate during the sunshine period and low power generation efficiency.

In order to solve the above technical problems, the existing photovoltaic power station can be transformed by tracking lighting, which includes pressure difference tracking control method, photoelectric sensor solar energy tracking control method and apparent sun motion trajectory tracking control method.

Among them, pressure difference tracking means that when the incident sunlight is deflected, a certain pressure difference will be generated on both sides of the closed container due to the different light-receiving areas. Under the action of the pressure difference, the tracking device will be realigned with the sun.

Photoelectric sensor solar tracking control system uses photosensitive silicon photoelectric tubes, silicon photocells and other components. The sensor is generally installed on the lighting board or in a fixed position. The position of the lighting board is adjusted by the rotation of the motor so that the lighting board faces the sun. When the sun moves westward, the lighting board also shifts. The photoelectric sensor will output a certain value of voltage or current as an input signal when exposed to sunlight. After amplification by the amplifier circuit, the angle of the solar lighting board is adjusted by the rotation of the motor so that the tracking system is aimed at the sun.

In the tracking control system of apparent solar motion trajectory, the tracking system can be divided into single-axis and dual-axis according to the number of axes. The single-axis tracking system has its rotation axis or focal line arranged in the north-south direction. According to the change of the solar latitude angle calculated in advance, the cylindrical parabola reflector rotates around the rotation axis to track the sun. Only at noon in a day is the sunlight perpendicular to the generatrix of the cylindrical parabola, and the heat is the highest at this time. Dual-axis tracking means that the sun can be tracked in changes in solar altitude and latitude angle. Dual-axis tracking can be divided into two methods: polar axis full tracking and altitude angle minus azimuth angle full tracking.

However, no matter which tracking lighting method is used, it requires high transformation costs and consumes additional energy when in use, resulting in a long payback period for the project, which is not conducive to the promotion of photovoltaic power generation projects to the commercial field. Therefore, it is necessary to develop new photovoltaic power generation components to achieve a balance between cost and benefit, which is conducive to the comprehensive promotion of photovoltaic power generation.

Utility Model Content

The utility model aims to provide a novel photovoltaic power generation component.

According to the photovoltaic power generation component of the first aspect of the utility model, it includes a photovoltaic panel and a refractive cover, wherein the refractive cover is arranged in the light receiving area of the photovoltaic panel, the refractive cover is a light-transmitting material component, the outer cover surface of the refractive cover facing away from the photovoltaic panel is a smooth structure, and the inner cover surface of the refractive cover facing the photovoltaic panel is provided with a concave-convex structure for focusing light.

The photovoltaic power generation assembly according to the embodiment of the utility model has at least the following beneficial effects: since the outer cover of the photovoltaic panel is provided with the refraction cover, the photovoltaic panel can be placed in a horizontal manner without considering technical problems such as dust accumulation on its surface; when working, light that originally cannot irradiate the photovoltaic panel can also be refracted onto the photovoltaic panel through the concave-convex structure of the refraction cover, so as to increase the light-receiving area and the total amount of light received by the photovoltaic panel, thereby improving the photovoltaic power generation efficiency; compared with the prior art, the modification cost of the photovoltaic power generation assembly is relatively low, and no additional energy is consumed when in use, the economic benefit is good, and it is very suitable for promotion to the commercial field.

According to some embodiments of the utility model, the concave-convex structure includes multiple lens parts, the focusing directions of all lens parts are directed to the photovoltaic panel, and the light refracted by all lens parts is distributed on different areas of the photovoltaic panel, thereby avoiding local overheating of the photovoltaic panel.

According to some embodiments of the utility model, the photovoltaic power generation component also includes a light diffuser plate, which is arranged between the refractive cover and the photovoltaic panel. The light diffuser plate scatters the light received from the refractive cover to the photovoltaic panel to further increase the light receiving area of the photovoltaic panel.

According to some embodiments of the present invention, the refraction cover and the light diffusion plate are assembled in one piece to simplify the steps of on-site assembly.

According to some embodiments of the utility model, since the refraction cover and the light diffusion plate are assembled as one body, the space between the refraction cover and the light diffusion plate can be processed into a vacuum area to ensure that the light channel will not be affected by the external environment.

According to some embodiments of the utility model, the refraction cover is provided with a convex curved surface. Under the premise that the refraction cover is provided on the photovoltaic panel, since the refraction cover has a curved surface, the surface area of the curved surface is larger under the same material consumption, so as to improve the light flux.

According to some embodiments of the present utility model, the photovoltaic power generation component also includes an energy storage component, which is electrically connected to the photovoltaic panel and is used to store the electrical energy converted by the photovoltaic panel.

According to some embodiments of the present utility model, an isolation chamber is provided on the back side of the photovoltaic panel, and the energy storage component is located in the isolation chamber to achieve water and heat insulation for the energy storage component.

The photovoltaic power generation assembly according to the second aspect of the present invention comprises a mounting bracket and the above-mentioned photovoltaic power generation component, wherein the photovoltaic power generation component is mounted on the mounting bracket and the photovoltaic panel is placed horizontally.

The photovoltaic power generation assembly according to the embodiment of the utility model has at least the following beneficial effects: since the photovoltaic power generation component relies on the refraction cover to project light onto the photovoltaic panel, the photovoltaic power generation assembly does not need to be set to be movable, and can achieve a higher energy conversion rate when the photovoltaic panel is kept in a horizontal position, thereby reducing the production cost of the photovoltaic power generation assembly and promoting the development of photovoltaic power generation.

According to some embodiments of the present utility model, in order to limit the relative position between the refraction cover and the photovoltaic panel, the mounting bracket is provided with a plurality of limiting portions, and the refraction cover is limited between all the limiting portions.

Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic diagram of the three-dimensional structure of a photovoltaic power generation assembly according to an embodiment of the present utility model;

FIG2 is a top view of the photovoltaic power generation assembly shown in FIG1 ;

FIG3 is a perspective exploded view of the photovoltaic power generation assembly shown in FIG1 ;

FIG4 is a cross-sectional view of the photovoltaic power generation assembly shown in FIG2 along the A-A section line;

FIG. 5 is an exploded view of the photovoltaic power generation assembly shown in FIG. 4 .

In the accompanying drawings: 100 - photovoltaic panel, 200 - refraction cover, 101 - photovoltaic combination panel, 210 - concave-convex structure, 211 - lens part, 300 - light diffusion plate, 201 - vacuum area, 400 - mounting bracket, 410 - mounting position, 500 - isolation chamber, 510 - wire hole, 600 - energy storage component, 420 - limit part.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

As shown in Figures 3 to 5, the photovoltaic power generation component according to the first embodiment of the utility model includes a photovoltaic panel 100 and a refraction cover 200. The photovoltaic panel 100 can use the existing technology. Each photovoltaic panel 100 is composed of multiple silicon wafers. Since the size of the photovoltaic panel 100 is limited by the existing production process, in order to increase the light-receiving area, multiple photovoltaic panels 100 can be combined into a photovoltaic combination panel 101 through connectors to compensate for the low energy conversion rate in photovoltaic power generation.

The front side of the photovoltaic panel 101 faces the sun, and the back side of the photovoltaic panel 101 faces away from the sun. The power generation principle of the photovoltaic panel 100 utilizes the photoelectric effect of semiconductors: when photons irradiate metal, their energy can be completely absorbed by an electron in the metal. If the energy absorbed by the electron is large enough, it can overcome the Coulomb force inside the metal atom to do work, escape from the metal surface, and become photoelectrons. Silicon atoms have 4 outer electrons. If atoms with 5 outer electrons, such as phosphorus atoms, are doped into pure silicon, an N-type semiconductor is formed; if atoms with 3 outer electrons, such as boron atoms, are doped into pure silicon, a P-type semiconductor is formed. When the P-type and N-type are combined together, a potential difference is formed at the contact surface, forming a solar cell. When sunlight irradiates the P-N combination, current flows from the P-type side to the N-type side, forming a current.

Since the power generation efficiency of the photovoltaic panel 100 is proportional to the light energy it receives, the larger the light receiving area of the photovoltaic panel 100 and the higher the light intensity, the higher the power generation efficiency of the photovoltaic panel 100. At present, due to the consideration of light intensity, photovoltaic power generation facilities are generally set in areas with high light intensity, such as deserts, plateaus and other near-day areas, or open areas such as roofs and suburbs. And due to the consideration of the light receiving area, due to the rotation of the earth, most areas have sunrises and sunsets, so the incident angle of the sun changes cyclically every day, and because the earth revolves around the sun, the incident angle of the sun changes cyclically every year. According to the simulation, when the incident angle of the sun is perpendicular to the front of the photovoltaic panel 100, the light receiving area of the photovoltaic panel 100 is the largest at this time, and since most photovoltaic panels 100 are installed at a fixed tilt angle, when the incident angle of the sun changes, the light receiving area of the photovoltaic panel 100 will also change accordingly, resulting in fluctuations in its power generation during the sunshine period and low power generation efficiency. Since the geographical location of the photovoltaic panel 100 cannot be changed during use, if one wants to improve the power generation efficiency of the photovoltaic panel 100 , one has to start with other factors.

In order to improve the power generation efficiency of the photovoltaic panel 100, the utility model is provided with the refraction cover 200 on the basis of the prior art. The refraction cover 200 is provided in the light receiving area of the photovoltaic composite panel 101. The refraction cover 200 must be made of a light-transmitting material, such as inorganic glass or organic glass, and can be selected from materials such as polymethyl methacrylate with a light transmittance of more than 95%. Since the surface area of the cover body with a curved surface is larger under the same material dosage, in this embodiment, the shape of the refraction cover 200 can be selected as an incomplete sphere with a curved surface convex outward.

In addition, the outer cover surface of the refraction cover 200 facing away from the photovoltaic combination panel 101 is a smooth structure, and the inner cover surface of the refraction cover 200 facing the photovoltaic combination panel 101 is provided with a concave-convex structure 210 for focusing light, and the concave-convex structure 210 includes a plurality of lens portions 211, and the focusing directions of all the lens portions 211 point to the photovoltaic combination panel 101, and the light refracted by all the lens portions 211 is respectively distributed on different areas of the photovoltaic combination panel 101, so as to avoid local overheating of the photovoltaic combination panel 101. Since the surface area of the refraction cover 200 is larger than the surface area of the photovoltaic combination panel 101, the light energy received by the refraction cover 200 is more than the light energy originally received by the photovoltaic combination panel 101. The refraction cover 200 refracts the light that originally could not be irradiated on the photovoltaic combination panel 101 to the photovoltaic combination panel 101 through the concave-convex structure 210 of the refraction cover 200, and the refracted light is mostly perpendicular to the photovoltaic combination panel 101, so as to increase the light receiving area and the total amount of light received by the photovoltaic combination panel 101, thereby improving the photovoltaic power generation efficiency. Compared with the prior art, the modification cost of the photovoltaic power generation component is relatively low, and no additional energy is consumed when in use, the economic benefit is good, and it is very suitable for promotion to the commercial field.

In addition, the utility model has a technical effect that the prior art cannot achieve. Since the outer cover of the photovoltaic panel 100 is provided with the refraction cover 200, the photovoltaic combination panel 101 can be placed in a horizontal manner without considering technical problems such as dust accumulation on its surface. Once the refraction cover 200 accumulates dust, since its shape is an incomplete sphere, the dust on the refraction cover 200 can be easily washed away by rain or clean water without affecting the normal operation of the photovoltaic combination panel 101. Moreover, the horizontally placed photovoltaic combination panel 101 can better adapt to different incident angles of the sun, so that its front side is always facing the sun, and there will be no back-to-sun situation. In addition, since the manufacturing cost of the refraction cover 200 is much lower than the manufacturing cost of the photovoltaic panel 100, it can provide an outer layer of protection for the photovoltaic panel 100. In the case where the refraction cover 200 is not damaged, the service life of the photovoltaic panel 100 is greatly extended.

As shown in FIG. 4 and FIG. 5 , in some embodiments of the present invention, although the light refracted by all lens portions 211 is distributed on different areas of the photovoltaic combination panel 101, in order to further avoid local overheating and evenly disperse the light energy to the photovoltaic combination panel 101, a light diffusion plate 300 is further arranged between the refraction cover 200 and the photovoltaic combination panel 101. The size of the light diffusion plate 300 is the same as that of the photovoltaic combination panel 101, and the light diffusion plate 300 is arranged at intervals from the photovoltaic combination panel 101. The present invention does not propose improvements to the light diffusion plate 300, and the existing technology can be used, such as using a PMMA diffusion plate with high light transmittance. The light diffusion plate 300 scatters the light received from the refraction cover 200 to the photovoltaic combination panel 101 to further increase the light receiving area of the photovoltaic combination panel 101.

Furthermore, in order to simplify the on-site assembly steps, the refraction cover 200 and the light diffuser plate 300 are assembled as one piece when leaving the factory, and a sealant is applied at the connection between the two, so that the refraction cover 200 and the light diffuser plate 300 can be processed into a vacuum area 201 to ensure that the light channel will not be affected by the external environment.

As shown in Figures 1 to 5, the photovoltaic power generation assembly according to the second embodiment of the utility model includes the photovoltaic power generation assembly according to the first embodiment of the utility model, and also includes a mounting bracket 400, the mounting bracket 400 is reserved with a mounting position 410 for mounting the photovoltaic combination panel 101, so that the photovoltaic combination panel 101 can be placed in a horizontal manner. In addition, the mounting bracket 400 is connected to an isolation chamber 500 below the photovoltaic combination panel 101, the isolation chamber 500 is used to store photovoltaic cells and other electrical components, and a wire hole 510 is opened on the top of the isolation chamber 500, and a sealing wire sleeve is provided in the wire hole 510. The wires of the photovoltaic panel 100 pass through the sealing wire sleeve and enter the isolation chamber 500, so as to realize the electrical connection between the photovoltaic panel 100 and the energy storage component 600. Since the isolation chamber 500 is external to the photovoltaic panel 100, and a sealing wire sleeve is provided in its wire hole 510, the isolation chamber 500 can achieve water insulation and heat insulation for the energy storage component 600.

In some embodiments of the present invention, in order to limit the relative position between the refraction cover 200 and the photovoltaic panel 100, the mounting bracket 400 is not only used to support the refraction cover 200, but also has a plurality of limiting parts 420, all of which together form a circular limiting space, and the refraction cover 200 is limited between all the limiting parts 420. When in use, the refraction cover 200 is placed on the mounting bracket 400 under the action of gravity, and since the upward and downward freedom of the refraction cover 200 is not limited, when the refraction cover 200 needs to be replaced, the refraction cover 200 can be directly taken out and replaced.

Since the photovoltaic power generation component relies on the refraction cover 200 to project light onto the photovoltaic panel 100, the photovoltaic power generation assembly does not need to be set as a movable type, and a higher energy conversion rate can be achieved when the photovoltaic panel 100 is kept in a horizontal position, thereby reducing the production cost of the photovoltaic power generation assembly and promoting the development of photovoltaic power generation.

The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims (10)

1. Photovoltaic power generation module, its characterized in that: including photovoltaic board (100) and refraction cover (200), refraction cover (200) cover is established the light receiving area of photovoltaic board (100), refraction cover (200) are the printing opacity material component, refraction cover (200) are deviating from the dustcoat face of photovoltaic board (100) is smooth structure, refraction cover (200) are facing towards the inner cover face of photovoltaic board (100) is equipped with concave-convex structure (210) that are used for spotlight.

2. The photovoltaic power generation assembly of claim 1, wherein: the concave-convex structure (210) comprises a plurality of lens parts (211), the focusing directions of all the lens parts (211) point to the photovoltaic panel (100), and light rays refracted by all the lens parts (211) are distributed on different areas of the photovoltaic panel (100) respectively.

3. The photovoltaic power generation assembly of claim 2, wherein: also included is a light diffuser plate (300), the light diffuser plate (300) being disposed between the refractive cover (200) and the photovoltaic panel (100).

4. A photovoltaic power module according to claim 3, characterized in that: the refraction cover (200) is integrally assembled with the light diffusion plate (300).

5. The photovoltaic power generation assembly of claim 4, wherein: a vacuum region (201) is formed between the refraction cover (200) and the light diffusion plate (300).

6. The photovoltaic power generation assembly of claim 1, wherein: the refraction cover (200) is provided with an outwards convex cambered surface.

7. The photovoltaic power generation assembly of claim 1, wherein: the photovoltaic panel also comprises an energy storage component (600), wherein the energy storage component (600) is electrically connected with the photovoltaic panel (100).

8. The photovoltaic power generation assembly of claim 7, wherein: an isolation chamber (500) is arranged on the back surface of the photovoltaic panel (100), and the energy storage component (600) is positioned in the isolation chamber (500).

9. A photovoltaic power generation assembly comprising the photovoltaic power generation assembly according to any one of claims 1 to 8, further comprising: and the photovoltaic power generation assembly is arranged on the mounting bracket (400), and the photovoltaic panel (100) is horizontally placed.

10. The photovoltaic power generation assembly of claim 9, wherein: the mounting bracket (400) is provided with a plurality of limiting portions (420), and the refractive cover (200) is defined between all the limiting portions (420).