CN219304788U

CN219304788U - Photovoltaic system and photovoltaic power station

Info

Publication number: CN219304788U
Application number: CN202223122634.3U
Authority: CN
Inventors: 邬林勇; 李强; 付玉锋
Original assignee: Longi Green Energy Technology Co Ltd
Current assignee: Longi Green Energy Technology Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-07-04
Anticipated expiration: 2032-11-23

Abstract

The application discloses photovoltaic system and photovoltaic power plant, photovoltaic system includes: the photovoltaic module comprises a mounting base, a photovoltaic bracket, a photovoltaic module and a reflecting device; the photovoltaic bracket is fixed on the installation plane of the installation base, and the photovoltaic module is installed on the photovoltaic bracket; the light reflecting device comprises: the device comprises a shell, a scroll and a reflective film, wherein the reflective film is wound on the scroll; the shell is connected with the photovoltaic bracket and is provided with a containing cavity, and the scroll is rotationally connected in the containing cavity so as to enable the reflective film to be switched between an unfolding state and a containing state; in the unfolded state, at least part of the reflective film extends out of the shell and is connected with the mounting base, and a preset included angle is formed between the reflective film and the mounting plane; in the storage state, the reflective film is stored in the storage cavity. Thus, the light reflecting film is conveniently unfolded and stored, so that when the light reflecting film is not required to be used, the light reflecting film is stored in the shell, the occupied space of the light reflecting device is reduced, and the included angle between the light reflecting film and the installation plane can be adjusted when the light reflecting film is unfolded.

Description

Photovoltaic system and photovoltaic power station

Technical Field

The application belongs to the technical field of photovoltaics, and particularly relates to a photovoltaic system and a photovoltaic power station.

Background

Solar energy is a clean, safe and reliable energy source, and with the increasing shortage of energy sources, the application and popularization of solar energy are becoming more and more widespread. The photovoltaic power generation system generally comprises a photovoltaic module and a photovoltaic bracket for fixing the photovoltaic module, wherein the photovoltaic module is composed of a high-efficiency crystalline silicon solar cell, a back plate, a frame and the like, and solar energy can be converted into electric energy through a photoelectric conversion effect. Therefore, improving the solar energy utilization rate of the photovoltaic module in the photovoltaic power generation system is an important research direction of photovoltaic technology.

In the prior art, a ground reflecting film is paved in a region where a photovoltaic system is located, so that the ground reflecting film and the photovoltaic module form a certain angle, and sunlight is reflected to the front surface or the back surface of the photovoltaic module through the ground reflecting film, so that the illumination intensity of the photovoltaic module is increased.

However, the floor-reflecting film is laid in the prior art, so that the floor area is large, the expansion of the floor area has a certain limitation on the built photovoltaic power station, and the laid floor-reflecting film is inconvenient to store and transport.

Disclosure of Invention

The application aims at providing a photovoltaic system and photovoltaic power plant, solves the mode of laying ground reflective film among the prior art at least, and area is great to the ground reflective film of laying is inconvenient for accomodating and one of the transportation's problem.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, embodiments of the present application provide a photovoltaic system, including: the photovoltaic module comprises a mounting base, a photovoltaic bracket, a photovoltaic module and a reflecting device; the photovoltaic bracket is fixed on the installation plane of the installation base, and the photovoltaic module is installed on the photovoltaic bracket;

the light reflecting device includes: the device comprises a shell, a scroll and a reflective film, wherein the reflective film is wound on the scroll; the shell is connected with the photovoltaic bracket and is provided with a containing cavity, and the scroll is rotationally connected in the containing cavity so as to enable the reflective film to be switched between an unfolding state and a containing state;

in the unfolded state, at least part of the reflective film extends out of the shell and is connected with the mounting base, and a preset included angle is formed between the reflective film and the mounting plane; in the storage state, the reflective film is stored in the storage cavity.

Optionally, the light reflecting device further includes: an elastic member;

the two ends of the scroll are respectively connected with the shell in a rotating way, at least one end of the scroll is provided with the elastic piece, one end of the elastic piece is connected with the scroll, and the other end of the elastic piece is connected with the shell; during rotation of the spool relative to the housing, the resilient member is elastically deformed to provide rotational tension to the spool.

Optionally, the photovoltaic module includes a first edge and a second edge that are disposed opposite to each other, a distance between the first edge and the mounting base is smaller than a distance between the second edge and the mounting base, and the housing is disposed close to the first edge;

the reflective film comprises a third side and a fourth side which are oppositely arranged, the third side is fixedly connected with the scroll, and at least part of the fourth side extends out of the shell; in the unfolded state, the fourth side extends in a direction away from the photovoltaic module and is fixedly connected to the mounting base.

Optionally, the photovoltaic system further comprises: a fastener;

the fourth side of the reflective film is provided with a plurality of fixing holes which are arranged at intervals along the direction parallel to the axis of the scroll; the fastener penetrates through the fixing hole and is fixedly connected with the mounting base.

Optionally, the housing is detachably connected with the photovoltaic bracket, and/or is connected in a sliding manner up and down.

Optionally, the photovoltaic system further comprises: the buckle is connected to the photovoltaic bracket, and a clamping hole is formed by encircling the buckle and the photovoltaic bracket;

the two ends of the shell are respectively provided with a fixed end, and the fixed ends are clamped in the clamping holes.

Optionally, the light reflecting film includes: a flexible substrate and a reflective coating;

the reflective coating is attached to a side of the flexible base layer facing away from the mounting base with the reflective membrane in the deployed state.

Optionally, the preset included angle is 26-90 degrees.

Optionally, the photovoltaic module is a double-sided photovoltaic module; and/or the light reflecting film is a diffuse reflecting film.

In a second aspect, embodiments of the present application provide a photovoltaic power plant, including a photovoltaic system as described in any one of the above.

In the embodiment of the application, set up reflector device in photovoltaic system, reflector device includes casing and reflective membrane, installs the casing on photovoltaic support, and the reflective membrane is convoluteed on the spool in the casing, and the spool rotates to be connected in the casing, and then makes things convenient for the quick expansion and the accomodating of reflective membrane to when need not use reflective membrane, accomodate reflective membrane in the casing, can reduce reflector device's occupation space, convenient fortune dimension operation to photovoltaic system. And when the reflective membrane is unfolded, the extension length of the reflective membrane can be changed to adjust the included angle between the reflective membrane and the installation plane of the installation base, so that the reflective angle of the reflective membrane can be adjusted according to the geographical environment where the photovoltaic system is positioned in actual use, the light reflection quantity of the reflective membrane can be improved, and the power generation efficiency of the photovoltaic module can be increased.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is one of the schematic structural diagrams of a photovoltaic system according to an embodiment of the present application;

FIG. 2 is a second schematic structural view of a photovoltaic system according to an embodiment of the present application;

FIG. 3 is a third schematic structural view of a photovoltaic system according to an embodiment of the present application;

FIG. 4 is a fourth schematic structural view of a photovoltaic system according to an embodiment of the present application;

FIG. 5 is one of the schematic structural views of a light reflecting device according to an embodiment of the present application;

FIG. 6 is a second schematic structural view of a light reflecting device according to an embodiment of the present application;

fig. 7 is a schematic view of a partial structure of a light reflecting device according to an embodiment of the present application;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7 in accordance with an embodiment of the present application;

FIG. 9 is one of the partial structural schematic diagrams of the photovoltaic system according to an embodiment of the present application;

FIG. 10 is a second schematic view of a partial structure of a photovoltaic system according to an embodiment of the present application;

fig. 11 is a cross-sectional view of a retroreflective sheeting according to an embodiment of the present application.

Reference numerals:

10. a mounting base; 101. a mounting plane; 20. a photovoltaic support; 201. a buckle; 30. a photovoltaic module; 40. a light reflecting device; 401. a housing; 4011. fixing the end head; 402. a reel; 403. a reflective film; 4031. a fixing hole; 403a, a flexible base layer; 403b, a reflective coating; 404. an elastic member; 50. a fastener; A. an included angle is preset.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The following describes a photovoltaic system and a photovoltaic power station provided in the embodiments of the present application in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 1 and 5, a photovoltaic system according to some embodiments of the present application includes: the photovoltaic module comprises a mounting base 10, a photovoltaic bracket 20, a photovoltaic module 30 and a light reflecting device 40; the photovoltaic bracket 20 is fixed on the mounting plane 101 of the mounting base 10, and the photovoltaic module 30 is mounted on the photovoltaic bracket 20; the light reflecting device 40 includes: a housing 401, a reel 402, and a light reflecting film 403, the light reflecting film 403 being wound on the reel 402; the housing 401 is connected to the photovoltaic bracket 20, the housing 401 has a receiving cavity, and the reel 402 is rotatably connected in the receiving cavity, so that the reflective film 403 is switched between an unfolded state and a receiving state; in the unfolded state, at least part of the reflective film 403 extends out of the housing 401 to be connected with the mounting base 10, and a preset included angle A is formed between the reflective film 403 and the mounting plane 101; in the storage state, the reflective film 403 is stored in the storage chamber.

In this application embodiment, set up reflector device 40 in photovoltaic system, reflector device 40 includes casing 401 and reflective membrane 403, install casing 401 on photovoltaic support 20, reflective membrane 403 winds on spool 402 in casing 401, spool 402 rotates and connects in casing 401, and then makes things convenient for the quick expansion and the accomodating of reflective membrane 403, so that when not needing to use reflective membrane 403, accomodate reflective membrane 403 in casing 401, can reduce reflector device 40's occupation space, the operation and maintenance operation of photovoltaic system is convenient. And, when the reflective film 403 is unfolded, the included angle between the reflective film 403 and the installation plane 101 of the installation base 10 can be adjusted by changing the extension length of the reflective film 403, so that the inclination of the reflective film 403 can be adjusted according to the geographical environment where the photovoltaic system is located in actual use, the light reflection amount of the reflective film 403 can be improved, and the power generation efficiency of the photovoltaic module 30 can be increased.

Specifically, the photovoltaic system of the embodiment of the application can be used for solar power generation of different application scenes such as land, ocean, building roof and the like, the photovoltaic system comprises a mounting base 10 for mounting and fixing a photovoltaic bracket 20, the photovoltaic bracket 20 is fixed on a mounting plane 101 of the mounting base 10, and the photovoltaic module 30 is mounted on the photovoltaic bracket 20.

Wherein, the installation base 10 can be a land ground, and the horizontal ground is the installation plane 101; the installation base 10 may be a fixed pile foundation built on the ocean, and the installation surface of the pile foundation is an installation plane 101; the installation base 10 may be a floating buoyancy tank built on the ocean, and the installation surface on the buoyancy tank is an installation plane 101; the mounting base 10 may also be a roof of a building, the roof of which is the mounting plane 101.

Of course, the photovoltaic system in the embodiment of the present application may also be applied to other application scenarios, where the photovoltaic system includes a mounting base 10, and a working surface on the mounting base 10 for mounting and fixing the photovoltaic bracket 20 is a mounting plane 101, and the specific mounting plane 101 may be determined according to an actual application scenario, which is not limited in this embodiment of the present application.

It can be appreciated that, in order to make the photovoltaic module 30 better able to receive sunlight, a certain inclination angle is usually formed between the photovoltaic module 30 and the installation plane 101 when the photovoltaic module 30 is installed, so that the front surface of the photovoltaic module 30 faces the sun, thereby helping to increase the sunlight receiving amount of the photovoltaic module 30. The photovoltaic module 30 converts solar energy into electric energy through a photoelectric conversion effect, and the amount of sunlight received by the photovoltaic module directly affects the photoelectric conversion efficiency. However, the photovoltaic module 30 is limited in the installation area, and the receiving amount of the sunlight is limited, so that more sunlight can be reflected to the surface of the photovoltaic module 30 by providing the light reflecting means 40.

In this embodiment, by setting the light reflecting device 40 in the photovoltaic system, the sunlight outside the coverage area of the photovoltaic module 30 is reflected to the surface of the photovoltaic module 30 by using the light reflecting device 40, so as to improve the sunlight receiving amount of the photovoltaic module 30, and further improve the power generation efficiency of the photovoltaic module 30.

Specifically, the light reflecting device 40 may include a housing 401, a reel 402, and a light reflecting film 403, the housing 401 is mounted on the photovoltaic support 20, the housing 401 has a receiving cavity, the reel 402 is disposed in the receiving cavity of the housing 401, the light reflecting film 403 is wound on the reel 402, the reel 402 is rotatably connected to the housing 401, and the light reflecting film 403 can be switched between an unfolded state and a received state by rotation of the reel 402.

Under the condition that the reflective film 403 is in the unfolded state, the reflective film 403 at least partially extends out of the housing 401, and the portion of reflective film 403 is connected with the mounting base 10, so that a preset included angle a is formed between the reflective film 403 and the mounting plane 101 of the mounting base 10, and sunlight can be reflected to the surface of the photovoltaic module 30 by utilizing the light reflection effect of the reflective film 403, so that the sunlight receiving amount of the photovoltaic module 30 is improved, and the photoelectric conversion efficiency of the photovoltaic module 30 is improved.

In the case where the light reflecting film 403 is in the storage state, the light reflecting film 403 may be stored in the storage cavity of the housing 401, so that the light reflecting film 403 is stored in the housing 401 when the light reflecting film 403 is not required, and the space occupied by the light reflecting device 40 can be reduced. Thus, the installation and transportation of the light reflecting device 40 are facilitated. Moreover, after the light reflecting device 40 is installed and used, the unfolding state of the light reflecting film 403 can be adjusted according to the operation and maintenance requirements of the photovoltaic system, when operation and maintenance operations are required to be carried out on the photovoltaic support 20 and the photovoltaic module 30, the light reflecting film 403 can be quickly stored, the influence on operation and maintenance work is avoided, after the operation and maintenance work is finished, the light reflecting film 403 can be unfolded again, and the light reflecting film 403 is restored to the unfolding state.

In this embodiment, when the reflective film 403 is unfolded, at least part of the reflective film 403 extends out of the housing 401, and the reflective film 403 forms a plane, or approximately forms a plane, and a certain included angle is formed between the plane where the reflective film 403 is located and the mounting plane 101 of the mounting base 10.

Specifically, the mounting height of the housing 401 is determined, and by adjusting the length of the light reflecting film 403 protruding out of the housing 401, the angle between the light reflecting film 403 and the mounting plane 101 of the mounting base 10 can be adjusted, so that the reflection angle of the light reflecting film 403 to sunlight can be adjusted.

It will be understood that, as shown in fig. 3, the distance between the housing 401 and the mounting plane 101 is H, the extension length of the reflective film 403 is L, and the preset included angle between the reflective film 403 and the mounting plane 101 of the mounting base 10 is a, the preset included angle a may be calculated according to the following formula:

sin(A)＝H/L (1)

in practical application, because the geographic positions of the photovoltaic systems are different, the relative heights of the sun are different, and the irradiation angles of the sunlight are also different, the preset included angle A matched with the actual geographic positions is obtained by adjusting the extension length L of the reflective film 403, so that the light reflection quantity of the reflective film 403 is improved, and the power generation efficiency of the photovoltaic module 30 is increased.

It should be noted that, in practical application, the preset angle a between the reflective film 403 and the installation plane 101 may be determined by a person skilled in the art according to the geographical latitude of the photovoltaic system, which is not limited in this embodiment of the present application.

In some embodiments, as shown in fig. 3, the predetermined angle a between the reflective film 403 and the mounting plane 101 of the mounting base 10 may be 26 ° to 90 °. Specifically, the preset included angle a may include: any angle of 26 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 80 degrees, 90 degrees and the like. Of course, other angles can be selected for the preset included angle a, and those skilled in the art can set the preset included angle a according to actual needs.

As can be appreciated, the inventor has found through experiments that when the preset included angle a formed between the reflective film 403 and the installation plane 101 of the installation base 10 is greater than or equal to 26 °, sand particles can freely roll down on the surface of the reflective film 403, which is helpful for automatic dust removal on the surface of the reflective film 403, so that the surface of the reflective film 403 is reduced from being covered by sand, and the self-cleaning performance of the reflective film 403 can be improved especially when the photovoltaic system is applied in environments with large wind and sand.

In a specific application, a user can correspondingly adjust a preset included angle a formed between the reflective film 403 and the installation plane 101 of the installation base 10 according to the geographical position where the photovoltaic system is located, so as to improve the light reflection effect of the reflective film 403, reduce the accumulation of sand on the surface of the reflective film 403, and improve the surface cleanliness of the reflective film 403 during the use process, thereby further improving the light reflection effect of the reflective film 403.

In some embodiments, the housing 401 may have a cylindrical barrel shape, a square barrel shape, or other shapes. The housing 401 may be made of a metal material to increase the mechanical strength and the service life of the housing 401, for example, steel, aluminum alloy, or other metal materials may be used. Of course, the specific manufacturing materials and specific structural shapes of the housing 401 may be set according to actual needs, which is not limited in the embodiment of the present application.

Optionally, as shown in fig. 7 and 8, the light reflecting device 40 further includes: an elastic member 404; the two ends of the scroll 402 are respectively and rotatably connected with the shell 401, at least one end of the scroll 402 is provided with an elastic piece 404, one end of the elastic piece 404 is connected with the scroll 402, and the other end of the elastic piece 404 is connected with the shell 401; during rotation of the spool 402 relative to the housing 401, the elastic member 404 elastically deforms to provide rotational tension to the spool 402.

In this embodiment of the present application, by providing the elastic member 404 at the end of the reel 402, the end of the reel 402 is rotationally connected with the housing 401 through the elastic member 404, and in the rotation process of the reel 402 relative to the housing 401, the elastic member 404 is elastically deformed, so as to generate a resilience force, so that under the action of the resilience force, the rotation tension of the reel 402 can be provided, so that the deployed reflective film 403 is quickly stored in the storage cavity of the housing 401.

Specifically, the elastic member 404 may be a spring, and two ends of the spool 402 are rotatably connected to the housing 401, and a spring is disposed at one end of the spool 402, or two ends of the spool 402 may be disposed with a spring, so as to increase the rotation tension of the spool 402. The spring is sleeved on the outer side of the reel 402, one end of the spring can be fixedly connected with the reel 402, and the other end of the spring is fixedly connected with the shell 401.

In practical application, the reflective film 403 is stretched by pulling the portion of the reflective film 403 extending out of the housing 401, in this process, the reel 402 rotates relative to the housing 401, and as the reel 402 rotates, the spring is twisted to generate a resilience force, the elastic member 404 provides a rotation tension force to the reel 402, and when the tension force to the reflective film 403 is released, the reel 402 can automatically rotate under the resilience force of the spring, so as to realize the winding action of the reflective film 403, and thus, the reflective film 403 can be quickly and automatically stored.

It should be noted that, in the embodiment of the present application, other elastic devices may be used for the elastic member 404, and those skilled in the art may select the elastic device according to actual needs, which is not limited in the embodiment of the present application.

Alternatively, as shown in fig. 2, the photovoltaic module 30 includes a first side and a second side, the distance between the first side and the mounting base 10 is smaller than the distance between the second side and the mounting base 10, and the housing 401 is disposed near the first side; the reflective film 403 includes a third side and a fourth side, the third side is fixedly connected to the reel 402, and the fourth side at least partially extends out of the housing 401; in the unfolded state, the fourth side extends away from the photovoltaic module 30, and the fourth side is fixedly connected to the mounting base 10.

In this embodiment of the application, through setting up the relative position of reflection device 40 and photovoltaic support 20 and photovoltaic module 30, make reflective membrane 403 expand the back and lie in and be close to photovoltaic module 30 positive one side to make reflective membrane 403 extend to the direction of keeping away from photovoltaic module 30, thereby reduce photovoltaic module 30 and shelter from reflective membrane 403, make reflective membrane 403 can reflect more sunlight to photovoltaic module 30's surface.

In a specific application, the photovoltaic module 30 has a certain inclination, which is set to change the angle at which the photovoltaic module 30 receives solar rays, and after the photovoltaic module 30 is mounted to the photovoltaic bracket 20, the first side of the photovoltaic module 30 is closer to the mounting plane 101 of the mounting base 10, and the second side of the photovoltaic module 30 is farther from the mounting plane 101 of the mounting base 10 due to the inclined setting of the photovoltaic module 30. The housing 401 is arranged on the photovoltaic bracket 20 near the first side of the photovoltaic module 30, i.e. the light reflecting means 40 is arranged on the side near the front side of the photovoltaic module 30.

Wherein, the reflective film 403 may include a third side and a fourth side, the third side of the reflective film 403 is fixedly connected to the reel 402, the fourth side of the reflective film 403 extends out of the housing 401 at least partially, and the reflective film 403 may be unfolded by pulling the fourth side of the reflective film 403. In the unfolded state of the light reflecting film 403, the fourth side of the light reflecting film 403 extends away from the photovoltaic module 30 and fixes the fourth side of the light reflecting film 403 on the mounting plane 101 of the mounting base 10.

It will be appreciated that the side of the photovoltaic module 30 facing the sun is the front side and the side of the photovoltaic module 30 facing away from the sun is the back side. After the photovoltaic module 30 is obliquely installed, the front surface of the photovoltaic module 30 faces the sun. The light reflecting film 403 is disposed on a side close to the front surface of the photovoltaic module 30, so that the light reflecting film 403 is beneficial to receiving sunlight. If the reflective film 403 is disposed on a side close to the back of the photovoltaic module 30, the reflective film 403 may be blocked by the photovoltaic module 30, which affects the light receiving of the reflective film 403.

In a specific application, the fixed position of the fourth side of the reflective film 403 on the mounting plane 101 of the mounting base 10 may be adjusted to change the preset angle a between the reflective film 403 and the mounting plane 101, so as to adjust the transmission path of the reflected light of the reflective film 403, so that the reflected light of the reflective film 403 can be transmitted to the front or back of the photovoltaic module 30.

In some embodiments, the photovoltaic module 30 may be a double-sided photovoltaic module 30, and the double-sided photovoltaic module 30 is adopted, and the front and the back of the photovoltaic module 30 have photoelectric conversion capability and can generate electricity by using received sunlight.

In this embodiment of the application, set up photovoltaic module 30 as two-sided photovoltaic module, the light that reflects through reflective membrane 403 can be absorbed by photovoltaic module 30's front, also can be absorbed by photovoltaic module 30's the back, through photovoltaic module 30 and reflective membrane 403's cooperation, can promote photovoltaic module 30's front and the illumination intensity on the back simultaneously, has increased photovoltaic module 30's photoelectric conversion efficiency.

Specifically, the bifacial photovoltaic module may comprise: the n-type double-sided photovoltaic module or the p-type double-sided photovoltaic module, the photovoltaic module 30 can be any other type double-sided photovoltaic module, and a person skilled in the art can select the double-sided photovoltaic module according to actual needs, which is not limited in the embodiment of the present application.

In particular, as shown in fig. 1, the photovoltaic system may include multiple groups of photovoltaic modules 30, where the photovoltaic module 30 on the right side in the drawing is a first photovoltaic module, the photovoltaic module 30 on the right side is a second photovoltaic module, the front sides of the first photovoltaic module and the second photovoltaic module face upward left, the two groups of photovoltaic modules 30 are all installed and fixed on the installation plane 101 of the installation base 10 through the photovoltaic bracket 20, and a certain distance is reserved between two adjacent groups of photovoltaic modules 30 so as to be used as an overhaul channel.

The reflective film 403 is disposed on one side of the first photovoltaic module, which is close to the second photovoltaic module, and after the sunlight irradiates the surface of the reflective film 403, the sunlight can be reflected to the front surface of the first photovoltaic module and the back surface of the second photovoltaic module through the reflection effect of the reflective film 403. The first photovoltaic module and the second photovoltaic module can all select double-sided photovoltaic modules, so that the first photovoltaic module and the second photovoltaic module can generate electricity by utilizing light reflected by the reflecting film 403, and the power generation of the whole photovoltaic system can be improved.

Optionally, as shown in fig. 2 and 5, the photovoltaic system further includes a fastener 50, and the fourth side of the light reflecting film 403 is provided with a plurality of fixing holes 4031; the fixing holes 4031 are arranged at intervals in a direction parallel to the axis of the reel 402, and the fastening member 50 is inserted into the fixing hole 4031 and fixedly connected with the mounting base 10.

In this embodiment, a plurality of fixing holes 4031 are arranged at intervals on the fourth side of the reflective film 403, and by arranging the fastening members 50, the fastening members 50 are inserted into the fixing holes 4031 to fix the fourth side of the reflective film 403 on the mounting base 10, and meanwhile, by adjusting the fixing positions of the fastening members 50 and the mounting base 10, the included angle between the reflective film 403 and the mounting plane 101 of the mounting base 10 can be adjusted.

Specifically, a plurality of fixing holes 4031 may be provided at the fourth side of the light reflecting film 403 in a direction parallel to the axis of the reel 402, and the plurality of fixing holes 4031 may be provided near the edge of the light reflecting film 403 to reduce the influence of the fixing holes 4031 on the light reflecting effect of the light reflecting film 403.

In the practical application process, the preset angle a of the adaptation can be determined in advance according to the geographic position of the photovoltaic system, and the extension length L of the reflective film 403 is calculated based on the above formula (1). By pulling the fourth side of the light reflecting film 403, the light reflecting film 403 extends out from the housing 401, and the fastener 50 is used to pass through the fixing hole 4031 on the light reflecting film 403, so that the fourth side of the light reflecting film 403 is fixed on the mounting base 10, and the mounting and fixing of the light reflecting film 403 are realized. When the photovoltaic module 30 and the photovoltaic bracket 20 are required to be overhauled, the fastener 50 is pulled out, so that the reflective film 403 is curled and contained in the shell 401, and the operation is simple and convenient.

It should be noted that, the fastener 50 may be a ground anchor bolt, a screw, or the like, or may be a fastener 50 with other structures, and those skilled in the art may choose to use according to actual needs, which is not limited in the embodiments of the present application.

Alternatively, as shown in fig. 9 and 10, the housing 401 is detachably connected to the photovoltaic bracket 20. Through setting up casing 401 and photovoltaic support 20 and dismantling the connection, the equipment and the dismantlement of casing 401 and photovoltaic support 20 of being convenient for, and reflective membrane 403 can curl and accomodate in casing 401, have made things convenient for the actual installation of reflector 40 to use, can improve reflector 40 practical application's flexibility ratio and adaptability.

It should be noted that, the detachable connection manner between the housing 401 and the photovoltaic bracket 20 may include: screw connection, bolted connection, joint, grafting etc. connection mode, the person skilled in the art can set up according to actual need.

Optionally, the housing 401 is slidably connected to the photovoltaic bracket 20 up and down. In this embodiment, the photovoltaic support 20 is fixed on the installation plane 101 of the installation base 10 along the vertical direction, but casing 401 and photovoltaic support 20 sliding connection, but casing 401 follow the axis direction of photovoltaic support 20 and slide about photovoltaic support 20 to the relative position of casing 401 and photovoltaic support 20 is convenient for adjust, and then can adjust the contained angle between the reflective membrane 403 of expansion and the installation plane 101.

In some embodiments, as shown in fig. 9 and 10, the photovoltaic system further includes a buckle 201, where the buckle 201 is connected to the photovoltaic bracket 20, the buckle 201 and the photovoltaic bracket 20 enclose to form a clamping hole, two ends of the housing 401 are respectively provided with a fixing end 4011, and the fixing end 4011 is clamped in the clamping hole.

In this application embodiment, through set up buckle 201 on photovoltaic support 20 to enclose between messenger's buckle 201 and the photovoltaic support 20 and close and form the draw-in hole, the both ends of casing 401 set up fixed end 4011, with fixed end 4011 joint in the draw-in hole, can realize that casing 401 and photovoltaic support 20's can dismantle and be connected, the installation and the dismantlement of casing 401 and photovoltaic support 20 of being convenient for.

Specifically, the buckle 201 may include a square screw bolt, and the square screw bolt is connected to the photovoltaic bracket 20, so that a clamping hole is formed by surrounding between the square screw bolt and the photovoltaic bracket 20. Fixed end 4011 are respectively arranged at two ends of the shell 401, the fixed end 4011 can be clamped in the clamping hole, and the shell 401 and the photovoltaic bracket 20 can be detachably connected through the clamping of the fixed end 4011 and the clamping hole.

The cross-sectional shape of the fixing tip 4011 may be set to a polygonal structure, such as: triangle, rectangle etc. the shape of card hole can be with fixed end 4011 shape assortment to when fixed end 4011 joint in the card hole, utilize the card hole can play the spacing effect to fixed end 4011, in order to restrict the rotation of fixed end 4011 in the card hole. In this way, during the expansion or contraction of the reflective film 403, a large rotation of the housing 401 can be avoided.

Alternatively, as shown in fig. 11, the light reflecting film 403 includes: a flexible base layer 403a and a light reflective coating 403b; with the retroreflective film 403 in the unfolded state, the retroreflective coating 403b is attached to the side of the flexible substrate 403a facing away from the mounting base 10.

In this embodiment of the present application, by providing the flexible base layer 403a, the flexible base layer 403a has a certain flexibility and can be curled, and meanwhile, has a certain rigidity, and can play a role in supporting the reflective coating 403b, so that the reflective film 403 can form a planar structure or an approximately planar structure in the unfolded state. By providing the reflective coating 403b on the surface of the flexible base layer 403a, sunlight can be reflected to the surface of the photovoltaic module 30 by the reflective effect of the reflective coating 403 b.

Specifically, the reflective coating 403b is attached to at least one side surface of the flexible substrate 403a, and in the unfolded state of the reflective film 403, the reflective coating 403b faces the sun, so as to receive and reflect sunlight.

Wherein, the flexible base layer 403a may be selected from: the flexible material such as polyester fiber material, high-density polyethylene material, polypropylene material, polyurethane material, vinyl acetate copolymer material is made, is convenient for can curl the accomodate, makes flexible basic unit 403a have high strength, weatherability simultaneously to promote flexible basic unit 403 a's life.

Among them, the reflective coating 403b may be an organic reflective coating, for example: the acrylic resin can also be selected from metal oxide reflective materials such as: tantalum pentoxide, silicon dioxide, etc., although other types of retroreflective materials can be used for the retroreflective coating 403 b.

In a specific application, the reflective coating 403b may be formed by coating, spraying, depositing, or the like on the surface of the flexible base layer 403a, so as to increase the adhesion between the reflective coating 40b and the flexible base layer 403a, and improve the usability of the reflective film 403.

It should be noted that, the thickness of the reflective coating 403b may be smaller than that of the flexible base layer 403a, and the specific thicknesses of the reflective coating 403b and the flexible base layer 403a may be set according to actual needs, which is not limited in the embodiment of the present application.

In some embodiments, the light reflecting film 403 may be a diffuse reflecting film. By setting the reflective film 403 as a diffuse reflective film, after sunlight irradiates the surface of the reflective film 403, multi-angle reflection occurs, so that the probability of receiving reflected light by the photovoltaic module 30 can be increased, and the light receiving amount of the photovoltaic module 30 can be improved.

Optionally, the embodiment of the present application further provides a photovoltaic power station, where the photovoltaic power station includes the photovoltaic system in the foregoing embodiment.

Wherein, photovoltaic system includes: the photovoltaic module comprises a mounting base 10, a photovoltaic bracket 20, a photovoltaic module 30 and a light reflecting device 40; the photovoltaic bracket 20 is fixed on the mounting plane 101 of the mounting base 10, and the photovoltaic module 30 is mounted on the photovoltaic bracket 20; the light reflecting device 40 includes: a housing 401, a reel 402, and a light reflecting film 403, the light reflecting film 403 being wound on the reel 402; the housing 401 is connected to the photovoltaic bracket 20, the housing 401 has a receiving cavity, and the reel 402 is rotatably connected in the receiving cavity, so that the reflective film 403 is switched between an unfolded state and a receiving state; in the unfolded state, at least part of the reflective film 403 extends out of the housing 401 to be connected with the mounting base 10, and a preset included angle A is formed between the reflective film 403 and the mounting plane 101; in the storage state, the reflective film 403 is stored in the storage chamber.

It should be noted that, the photovoltaic power station in the embodiment of the present application includes the photovoltaic system in any of the foregoing embodiments, and the specific structure of the photovoltaic system may be referred to the foregoing, which is not described herein in detail.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic system, comprising: the photovoltaic module comprises a mounting base, a photovoltaic bracket, a photovoltaic module and a reflecting device; the photovoltaic bracket is fixed on the installation plane of the installation base, and the photovoltaic module is installed on the photovoltaic bracket;

in the accommodating state, the reflective film is accommodated in the accommodating cavity; in the unfolded state, at least part of the reflective film extends out of the shell and is connected with the mounting base, and a preset included angle is formed between the reflective film and the mounting plane.

2. The photovoltaic system of claim 1, wherein the light reflecting means further comprises: an elastic member;

3. The photovoltaic system of claim 2, wherein the photovoltaic module comprises oppositely disposed first and second sides, the first side being spaced from the mounting base less than the second side, the housing being disposed proximate the first side;

4. The photovoltaic system of claim 3, further comprising: a fastener;

5. The photovoltaic system of claim 1, wherein the housing is removably connected to the photovoltaic bracket and/or slidably connected up and down.

6. The photovoltaic system of claim 5, further comprising: the buckle is connected to the photovoltaic bracket, and a clamping hole is formed by encircling the buckle and the photovoltaic bracket;

7. The photovoltaic system of claim 1, wherein the light reflecting film comprises: a flexible substrate and a reflective coating;

8. The photovoltaic system of claim 1, wherein the predetermined included angle is 26 ° to 90 °.

9. The photovoltaic system of claim 1, wherein the photovoltaic module is a double-sided photovoltaic module; and/or the light reflecting film is a diffuse reflecting film.

10. A photovoltaic power plant comprising a photovoltaic system according to any one of claims 1 to 9.