Photovoltaic power generation device

Abstract

This invention discloses a photovoltaic power generation device, including at least one photovoltaic power generation unit. The photovoltaic power generation unit includes a housing, a light-transmitting component, a reflective component, and a first photovoltaic cell assembly. An opening is provided on one side of the housing, and the light-transmitting component is disposed at the opening. The reflective component is disposed at the bottom of the housing, forming an angle θ0 with the horizontal plane containing the bottom of the housing. The first photovoltaic cell assembly is disposed at the top of the housing, opposite to the reflective component. Incident light transmitted through the light-transmitting component is reflected by the reflective component onto the first photovoltaic cell assembly. The photovoltaic power generation device provided by this invention achieves efficient utilization of sunlight, while the relatively enclosed space protects the photovoltaic cell assembly from surface contamination, facilitating maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic power generation device. Background Art

[0002] Solar power generation is currently the most technologically mature new energy power generation method, and solar photovoltaic power generation technology is currently the most widely used and most suitable solar energy application technology for promotion and application. Photovoltaic power generation is a technology that uses the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy. Efficient photovoltaic power generation devices can significantly improve the efficiency of solar power generation. Current photovoltaic power generation devices mainly use inclined flat-plate structure photovoltaic cells, and sunlight is directly radiated on the photovoltaic cells to obtain radiation, thereby generating electricity. Photovoltaic power generation devices with this structure occupy a lot of space due to their inclined flat-plate structure photovoltaic cells, and the utilization of sunlight is limited; further, in photovoltaic power generation devices with this structure, the surface of the photovoltaic cells is easily contaminated, thereby affecting their power generation efficiency. For this reason, it is necessary to clean the surface from time to time, which significantly increases operating costs. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the existing photovoltaic power generation device has limited utilization of sunlight, and the surface is easily contaminated, affecting its power generation efficiency, and is troublesome to clean. A photovoltaic power generation device is provided, which is provided with a shell, and uses a reflective component at the bottom of the shell to reflect the solar radiation irradiated on the reflective component to the photovoltaic cell component arranged opposite to it, and part of the light is reflected and irradiated to the reflective component again, and then reflected to the photovoltaic cell component for a second time, thereby realizing efficient utilization of sunlight; the shell of the device forms a relatively closed space to protect the surface of the photovoltaic cell component so that it is not easily contaminated.

[0004] To solve the above problems, the present invention discloses a photovoltaic power generation device, comprising at least one photovoltaic power generation unit; the photovoltaic power generation unit comprises a shell, a light-transmitting component, a light-reflecting component and a first photovoltaic cell component; an opening is provided on one side of the shell, and the light-transmitting component is arranged at the opening; the light-reflecting component is arranged at the bottom of the shell, and forms an angle θ0 with a horizontal plane where the bottom of the shell is located; the first photovoltaic cell component is arranged at the top of the shell opposite to the light-reflecting component; and the incident light passing through the light-transmitting component is reflected by the light-reflecting component to the first photovoltaic cell component.

[0005] By adopting the above scheme, when the incident light of solar radiation enters the device through the light-transmitting component and is incident on the reflective component, the incident light is reflected and irradiates the first photovoltaic cell component arranged on the reflection path of the reflected light, the light is absorbed by the first photovoltaic cell component and converted into electrical energy, part of the light is reflected and irradiates the reflective component again, and then irradiates the first photovoltaic cell component after secondary reflection, thereby realizing efficient utilization of light; and the device is provided with a shell to form a relatively closed space, so as to protect the surface of the photovoltaic cell component and prevent it from being easily contaminated.

[0006] According to another specific embodiment of the present invention, the photovoltaic power generation device disclosed in the embodiment of the present invention, the photovoltaic power generation unit also includes a second photovoltaic cell assembly, and the second photovoltaic cell assembly is arranged in a position opposite to the light-transmitting assembly in the shell to receive light reflected by the reflective assembly.

[0007] By adopting the above technical solution, at certain times, due to the decrease in the solar altitude angle, the incident angle reflected by the reflective component to the first photovoltaic cell component changes, generating scattered light, and the utilization rate of the reflected light is reduced; a second photovoltaic cell component is installed opposite to the light-transmitting component, and the reflected light is irradiated to the first photovoltaic cell component and the second photovoltaic cell component at the same time, further utilizing the scattered light and improving the utilization rate of the reflected light.

[0008] According to another specific embodiment of the present invention, in the photovoltaic power generation device disclosed in the embodiment of the present invention, the angle θ0 formed by the reflective assembly and the horizontal plane where the bottom of the shell is located is:

[0009]

[0010] Among them, H0 is the solar altitude angle at noon at the place of use.

[0011] By adopting the above technical solution, the angle θ0 is set according to the midday solar altitude angle of the applicable site. When the incident light with a solar altitude angle of H0 enters the device through the light-transmitting component on the sun-facing side of the device and is incident on the reflective component, the light is reflected and irradiates the first photovoltaic cell component located on the upper side of the device. The angle is set so that most of it is absorbed by the first photovoltaic cell, and part of it is reflected and irradiates the reflector again, and then irradiates the first photovoltaic cell sheet on the top after secondary reflection, thereby realizing efficient use of light.

[0012] According to another specific embodiment of the present invention, in the photovoltaic power generation device disclosed in the embodiment of the present invention, the angle between the first photovoltaic cell assembly and the horizontal plane where the top of the shell is located is β, and 0°≤β≤θ0; β is a fixed value or is adjustable.

[0013] With the above solution, the first photovoltaic cell assembly is set to be parallel to or adjust the angle between the horizontal plane where the top of the shell is located according to the light reflected by the reflective assembly, so as to improve the utilization rate of the reflected light. In addition, when the incident angle reflected to the first photovoltaic cell assembly changes due to the decrease of the solar altitude angle at certain times, the incident angle is adjusted by adjusting the angle between the first photovoltaic cell assembly and the horizontal plane where the top of the shell is located, so as to improve the utilization rate of the reflected light.

[0014] According to another specific embodiment of the present invention, the photovoltaic power generation device disclosed in the embodiment of the present invention has a shell that is a rectangular or cube structure; the reflective component is arranged on the bottom of the shell, and one end of the reflective component is fixedly connected to the bottom of one side of the shell, and the other end is fixedly connected to the other side of the shell relative to the light-transmitting component; the first photovoltaic cell component is fixedly connected inside the top.

[0015] The above technical solution makes the overall structure of the device stable and the shape neat. A single photovoltaic power generation unit can be used as a module; or multiple photovoltaic power generation units can be combined into a multi-module device for easy application.

[0016] According to another specific embodiment of the present invention, in the photovoltaic power generation device disclosed in the embodiment of the present invention, the height H of the housing 40 is:

[0017] H=L(tgθ0+tgH0)

[0018] Wherein, L is the width between the side where the light-transmitting component is located and the other opposite side in the shell, H0 is the solar altitude angle at noon at the place of use, and θ0 is the angle between the reflective component and the horizontal plane where the bottom of the shell is located.

[0019] By adopting the above technical solution, the height H of the shell is set according to the bottom width L of the shell and the noon solar altitude angle H0 and θ0 of the ground, so that the first photovoltaic cell assembly can obtain the maximum total solar radiation energy throughout the day, thereby improving the utilization rate of solar radiation energy.

[0020] According to another specific embodiment of the present invention, the photovoltaic power generation device disclosed in the embodiment of the present invention, according to another specific embodiment of the present invention, further includes a third photovoltaic cell assembly, which is arranged on the side of the shell adjacent to the light-transmitting assembly; the reflective assembly is divided into a main section and an adjustment section along the horizontal extension direction of the light-transmitting assembly, and the adjustment section is arranged on a side of the shell away from the third photovoltaic cell assembly; the adjustment section forms an angle Φ with the horizontal plane where the main section is located; the angle Φ is adjustable, and the angle Φ is:

[0021] Φ=90-15×(ST-12)

[0022] Among them, ST is the solar radiation intensity at the location of use reaching 50W / m 2 The true solar time.

[0023] With the above solution, when the incident light deviates greatly from the normal direction of the light-transmitting component, the incident light may fall on the side of the device after being reflected by the reflective component 10, so the photovoltaic component is also installed on the side of the device. In addition, an extended end is provided at the end of the reflective component, and the angle Φ formed with the horizontal plane can be adjusted according to time, so that the angle of the reflected light incident on the third photovoltaic cell component can be adjusted to improve the utilization rate of the reflected light.

[0024] According to another specific embodiment of the present invention, in the photovoltaic power generation device disclosed in the embodiment of the present invention, the length W0 of the adjustment section along the horizontal extension direction of the light-transmitting component is:

[0025] W0=1 / 5×W

[0026] Wherein, W is the length of the reflective component in the direction in which the light-transmitting component extends horizontally.

[0027] By adopting the above solution, the reflective component is mainly used to reflect light to the first photovoltaic cell component, and part of it is used to reflect light to the third photovoltaic cell component. The allocation is more reasonable and the utilization rate of reflected light is improved.

[0028] According to another specific embodiment of the present invention, the photovoltaic power generation device disclosed in the embodiment of the present invention includes at least two photovoltaic power generation units; the photovoltaic power generation units are arranged adjacent to each other; and the bottom of the shell of one of the photovoltaic power generation units is connected to the top of the shell of the other photovoltaic power generation unit.

[0029] By adopting the above scheme, multiple photovoltaic power generation units are connected to each other at the bottom and top to form a multi-module device, and the overall structure is neat. The photovoltaic power generation device disclosed in this embodiment can be applied to the curtain wall of a building and installed on the sunny side of the building.

[0030] According to another specific embodiment of the present invention, in a photovoltaic power generation device disclosed in an embodiment of the present invention, the light-transmitting component is a high-light-transmitting glass; and the light-reflecting component is a glass reflective lens.

[0031] By adopting the above technical solution, the light transmittance of high-transmittance glass can reach more than 91.5%, and the reflectivity of glass reflective lens can reach 100%, which can improve the utilization rate of solar radiation.

[0032] The photovoltaic power generation device provided by the present invention realizes efficient use of sunlight, and at the same time, the relatively closed space protects the photovoltaic cell assembly so that the surface thereof is not contaminated, thereby facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a side cross-sectional view of an embodiment of a photovoltaic power generation device of the present invention;

[0034] Figure 2 is a side cross-sectional view of an embodiment of the photovoltaic power generation device of the present invention including a second photovoltaic cell assembly;

[0035] Figure 3 is a front cross-sectional view of an embodiment of a photovoltaic power generation device of the present invention;

[0036] Figure 4 It is a side cross-sectional view of an embodiment of the photovoltaic power generation device of the present invention including at least two photovoltaic power generation units.

[0037] Reference numerals:

[0038] 10: reflective component; 11: main body section; 12: adjustment section; 20: light-transmitting component; 31: first photovoltaic cell component; 32: second photovoltaic cell component; 33: third photovoltaic cell component; 40: shell. DETAILED DESCRIPTION

[0039] The following is an explanation of the embodiments of the present invention by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They 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 cannot be understood as a limitation on the present invention.

[0042] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0043] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] The embodiment of the present invention discloses a photovoltaic power generation device, such as Figure 1-3 As shown, it includes at least one photovoltaic power generation unit; the photovoltaic power generation unit includes a shell 40, a light-transmitting component 20, a reflective component 10 and a first photovoltaic cell component 31; an opening is provided on one side of the shell 40, and the light-transmitting component 20 is provided at the opening; the reflective component 10 is provided at the bottom of the shell 40, and forms an angle θ0 with the horizontal plane where the bottom of the shell 40 is located; the first photovoltaic cell component 31 is provided at the top of the shell 40 and opposite to the reflective component 10; and the incident light passing through the light-transmitting component 20 is reflected by the reflective component 10 to the first photovoltaic cell component 31.

[0046] Specifically, Figure 1-3 As shown, a photovoltaic power generation unit housing 40; wherein the light-transmitting component 20 is arranged on an opening on one side of the housing 40. The reflective component 10 is arranged at the bottom of the housing 40, and forms an angle θ0 with the horizontal plane where the bottom of the housing 40 is located; the first photovoltaic cell assembly 31 is arranged at the top of the housing 40 opposite to the reflective component 10, and one end is close to one end of the light-transmitting component 20 on the housing 40. The light-transmitting component 20 should be arranged on the side with incident sunlight, so that the solar radiation irradiated thereon can pass through; the incident sunlight passing through the light-transmitting component 20 can be reflected by the reflective component 10; the reflected light reflected by the reflective component 10 is irradiated on the first photovoltaic cell assembly 31, and the first photovoltaic cell assembly 31 converts the reflected light energy into electrical energy. Under this setting, in order to realize that the reflective component 10 reflects the incident light passing through the light-transmitting component 20 to the first photovoltaic cell component 31, the reflective component 10 is set at a side that is relatively far from the sunlight, especially the side that is closer to the ground, relative to the sunlight irradiation, especially the noon sunlight irradiation position, and the first photovoltaic cell component 31 is set on the path of the reflected light after the incident light is reflected. One specific implementation method is as follows: Figure 1-3 As shown, the light-transmitting component 20 is perpendicular to the horizontal plane, and the reflective component 10 is tilted upward from the end connected to the light-transmitting component 20 and forms an angle θ0 with the horizontal plane.

[0047] More specifically, the housing 40 can be made of a material such as metal or plastic that has a certain rigidity and can support the photovoltaic power generation device; the light-transmitting component 20 is fixedly connected to the housing 40. In order to allow the light-transmitting component 20 to fully transmit light, the side height of the housing 40 should be close to the height of the light-transmitting component 20, that is, the light-transmitting component 20 basically constitutes one side of the housing 40. The reflective component 10 is arranged on the bottom of the housing 40, one end of which is fixedly connected to the bottom of the housing 40 by bonding, riveting, etc., and can also be fixedly connected to the bottom end of the light-transmitting component 20 at the same time; and this end of the reflective component 10 forms an angle θ0 with the horizontal plane where the bottom is located; when θ0>0, the other end of the reflective component 10 is fixedly connected to the housing 40 relative to the other side of the light-transmitting component 20 by bonding, riveting, etc.; when θ0=0, the bottom end of the reflective component 10 can also be fixedly connected to the bottom of the housing 40.

[0048] The first photovoltaic cell assembly 31 is disposed on one side of the top of the housing 40 . To make the device compact and fully utilize the light-transmitting assembly 20 , the first photovoltaic cell assembly 31 can be close to or connected to the top of one side of the light-transmitting assembly 20 on the housing 40 .

[0049] It should be noted that the housing 40 includes at least a side surface and a bottom surface, and may include a top surface, in which the first photovoltaic cell assembly 31 is arranged or is a part of the top surface; or may not include a top surface, in which the first photovoltaic cell assembly 31 constitutes the top surface of the housing. The first photovoltaic cell assembly 31 may be attached to the corresponding surface by a dedicated material, or fixedly installed by a bracket, or connected to the housing by a connecting component.

[0050] In addition, in order to improve the utilization rate of incident sunlight, the light-transmitting component 20 should be made of highly transparent materials, such as highly transparent glass, highly transparent plastic, etc., and the transmittance is preferably above 90%; the reflective component 10 can be a glass reflector, a ceramic reflector, a metal reflector, etc., and the reflectivity is preferably above 90%. θ0 can be specifically determined according to the altitude angle of the sun at noon at the location where the photovoltaic power generation device is installed and the position of the first photovoltaic cell component 31 relative to the reflective component 10, and its setting should minimize the angle between the reflected light of the reflective component 10 and the normal of the first photovoltaic cell component 31.

[0051] With the above scheme, when the incident light of solar radiation enters the device through the light-transmitting component 20 and enters the reflective component 10, the incident light is reflected and irradiates the first photovoltaic cell component 31 arranged on the reflection path of the reflected light, and the light is absorbed by the first photovoltaic cell component 31 and converted into electrical energy, and part of it is reflected and irradiates the reflector again, and then irradiates the first photovoltaic cell component 31 after secondary reflection, so as to realize efficient use of light. In addition, the device is provided with a housing 40 to form a relatively closed space, so as to protect the surface of the first photovoltaic cell component 31 so that it is not easy to be contaminated and is easy to maintain.

[0052] According to another specific embodiment of the present invention, the photovoltaic power generation unit further includes a second photovoltaic cell assembly 32 , which is disposed in the housing 40 at a position opposite to the light-transmitting assembly 20 to receive light reflected by the reflective assembly 10 .

[0053] It should be noted that if Figure 2 As shown, at certain times, for sunlight incident along the angle θ1, part of the light will be transmitted to the second photovoltaic cell assembly 32 arranged opposite to the light-transmitting assembly 20 after being reflected by the reflective assembly 10, and its equivalent incident angle is (2θ0+θ1), which is much larger than the initial incident angle θ1 of the sun, thereby significantly increasing its power generation efficiency.

[0054] By adopting the above technical solution, at certain times, due to the decrease in the solar altitude angle, the incident angle reflected by the reflective component 10 to the first photovoltaic cell component 31 changes, generating scattered light, and the utilization rate of the reflected light is reduced; a second photovoltaic cell component 32 is installed opposite to the light-transmitting component 20, and the reflected light is irradiated to the first photovoltaic cell component 31 and the second photovoltaic cell component 32 at the same time, further utilizing the scattered light and improving the utilization rate of the reflected light.

[0055] According to another specific embodiment of the present invention, it also includes a photovoltaic cell assembly arranged back to back with the first photovoltaic cell assembly 31. Specifically, the first photovoltaic cell assembly 31 and the photovoltaic cell assembly can be separately arranged back to back, or can be two sides of a bifacial photovoltaic cell.

[0056] By adopting the above solution, a photovoltaic cell assembly is arranged on the back of the first photovoltaic cell assembly 31, and the photovoltaic cell assembly directly faces the solar radiation to generate electricity, thereby increasing the utilization rate of sunlight.

[0057] According to another specific embodiment of the present invention, the angle θ0 formed by the horizontal plane where the bottom of the housing 40 is located is:

[0058]

[0059] Among them, H0 is the solar altitude angle at noon at the place of use.

[0060] Specifically, the calculation method of the solar altitude angle H0 at noon at the installation site is as follows: assuming that the solar declination of the installation site is represented by δ, and the geographical latitude of the observation site is represented by Indicates that:

[0061] For the Northern Hemisphere,

[0062] For the Southern Hemisphere,

[0063] The calculated value of H0 is between 0°-90°, so the value of θ0 is between 0°-45°.

[0064] The smaller the angle between the incident light and the normal direction of the photovoltaic panel, that is, the larger the incident angle, the higher the power generation efficiency. The maximum solar radiation energy is at noon. The angle between the reflective assembly 10 and the horizontal plane is adjusted according to the solar altitude angle at noon. In this embodiment, when the bottom of the photovoltaic power generation device housing 40 is set on the ground, the angle between the refracted light at the peak power generation time of the day and the normal direction of the first photovoltaic cell assembly 31 can be minimized.

[0065] By adopting the above scheme, the angle θ0 is set according to the noon solar altitude angle of the applicable site to improve the utilization rate of solar radiation at noon. When the maximum solar altitude angle is H0, the incident light enters the device through the light-transmitting component 20 on the sunny side of the device and is incident on the reflective component 10. After reflection, the light irradiates the first photovoltaic cell component 31 located on the upper side of the device. The angle is set so that most of it is absorbed by the first photovoltaic cell, and part of it is reflected and irradiated to the reflector again, and then irradiated to the top photovoltaic cell sheet after secondary reflection, thereby realizing efficient utilization of light.

[0066] According to another specific embodiment of the present invention, Figure 1-4 As shown, the angle between the first photovoltaic cell assembly and the horizontal plane where the top of the shell is located is β, and 0°≤β≤θ0; β is a fixed value or an adjustable value.

[0067] Specifically, Figure 4 As shown, the first photovoltaic cell assembly 31 can be parallel to the horizontal plane where the top of the shell 40 is located, and is fixedly arranged, that is, β = 0°; the first photovoltaic cell assembly 31 can be fixedly connected to the top of the shell 40. The first photovoltaic cell assembly 31 can also be arranged at an inclined angle to the horizontal plane where the top of the shell 40 is located, such as Figure 1-2 As shown, the first photovoltaic cell assembly 31 and the horizontal plane where the top of the shell 40 is located are inclined at an angle β that satisfies 0°<β≤θ0, wherein β can be fixedly set, and its setting should at least minimize the normal angle between the reflective assembly 10 reflecting the midday sunlight and the photovoltaic cell assembly 31, so as to achieve the purpose of improving the utilization rate of light.

[0068] The angle β can also be set to satisfy 0°≤β≤θ0, and the angle β can be adjusted. Specifically, the first photovoltaic cell assembly 31 and the top of the shell 40 can be rotatably connected by axle connection, riveting, etc., so that the angle β can be adjusted; and a fixing member that allows the first photovoltaic cell assembly 31 to be relatively fixed at a certain angle is also required. It can also be that one end of the top of the shell 40 is rotatably connected to the side, and the other end is openable to the other side, the first photovoltaic cell assembly 31 is fixedly connected to the top of the shell 40, and the angle β between the first photovoltaic cell assembly 31 and the horizontal plane where the top of the shell 40 is located is adjustable by opening the top at a certain angle.

[0069] Based on the optimal θ0 calculated according to the solar altitude angle at noon in the place of use, the altitude angle of the sun will become smaller at other times of the day except at noon, and the incident angle reflected to the first photovoltaic cell assembly 31 will change. The angle β is set to be adjustable, and the incident angle can be adjusted by adjusting the angle β to improve the utilization rate of reflected light. The adjustment angle within the range of θ0 can achieve the maximum possible utilization of solar radiation throughout the day.

[0070] With the above solution, the first photovoltaic cell assembly 31 is set according to the light reflected by the reflective assembly 10, and the first photovoltaic cell assembly 31 is parallel or set to adjust the inclined angle between the horizontal plane where the top of the shell 40 is located, so as to improve the utilization rate of the reflected light. In addition, when the incident angle reflected to the first photovoltaic cell assembly 31 changes due to the decrease of the solar altitude angle at certain times, the incident angle is adjusted by adjusting the angle between the first photovoltaic cell assembly 31 and the horizontal plane where the top of the shell 40 is located, so as to improve the utilization rate of the reflected light.

[0071] According to another specific embodiment of the present invention, Figure 4 As shown, the shell 40 is a rectangular or cube structure; the reflective component 10 is arranged on the bottom of the shell 40, and one end of it is fixedly connected to the bottom of one side of the shell 40, and the other end is fixedly connected to the other side of the shell 40 relative to the transparent component 20; the first photovoltaic cell component 31 is fixedly connected in the surface.

[0072] Specifically, the light-transmitting assembly 20 is perpendicular to the horizontal plane where the bottom of the housing 40 is located, and the end of the reflective assembly 10 connected to the light-transmitting assembly 20 forms an angle θ0 with the bottom; the first photovoltaic cell assembly 31 is parallel to the reflective assembly 10; the light-transmitting assembly 20 forms an angle β with the first photovoltaic cell assembly 31, and β can be fixed to 0° or can be adjusted. A second photovoltaic cell assembly 32 can also be set on one side of the housing 40 relative to the light-transmitting assembly 20.

[0073] The above technical solution makes the overall structure of the device stable and the shape neat. A single photovoltaic power generation unit can be used as a module; or multiple photovoltaic power generation units can be combined into a multi-module device for easy application.

[0074] According to another specific embodiment of the present invention, the height H of the housing 40 is:

[0075] H=L(tgθ0+tgH0)

[0076] Wherein, L is the width between the side where the light-transmitting component 20 is located and the other opposite side in the shell 40, H0 is the solar altitude angle at noon at the place of use, and θ0 is the angle formed by the horizontal plane where the reflective component 10 and the bottom of the shell 40 are located.

[0077] Specifically, based on the optimal θ0 calculated according to the midday solar altitude angle at the place of use, and the shell 40 being a rectangular or cube structure, this embodiment comprehensively considers the bottom width L of the shell 40, the midday solar altitude angle H0 at the place of use, and the angle θ0 formed by the reflective component 10 and the horizontal plane where the bottom of the shell 40 is located, and adopts the above formula to calculate and set the height of the shell 40, so that the first photovoltaic cell component 31 receives the least shadow coverage by reflected light throughout the day and obtains the maximum total solar radiation energy throughout the day.

[0078] It should be noted that the width of the housing 40 can be designed according to specific needs.

[0079] By adopting the above scheme, the height H of the shell 40 is set according to the bottom width L of the shell 40 and the noon solar altitude angle H0 and θ0 of the ground, so that the first photovoltaic cell assembly 31 can obtain the maximum total solar radiation energy throughout the day, thereby improving the utilization rate of solar radiation energy.

[0080] According to another specific embodiment of the present invention, Figure 3 As shown, it also includes a third photovoltaic cell assembly 33, which is arranged on the side of the shell 40 adjacent to the light-transmitting assembly 20; the reflective assembly 10 is divided into a main section 11 and an adjustment section 12 along the horizontal extension direction of the light-transmitting assembly 20, and the adjustment section 12 is arranged on a side of the shell 40 away from the third photovoltaic cell assembly 33; the adjustment section 12 forms an angle Φ with the horizontal plane where the main section 11 is located; the third photovoltaic cell assembly 33 receives light reflected by the adjustment section 12 of the reflective assembly 10.

[0081] Specifically, a third photovoltaic cell assembly 33 is arranged on one or both sides adjacent to the light-transmitting assembly 20, and the third photovoltaic cell assembly 33 is perpendicular to the horizontal plane where the bottom of the shell 40 is located. An adjustment section 12 is arranged at one or both ends of the reflective assembly 10 in the direction in which the light-transmitting assembly 20 extends horizontally, and the other parts are the main body section 11. The adjustment section 12 corresponding to each third photovoltaic cell assembly 33 is arranged on the side opposite to the third photovoltaic cell assembly 33, and the adjustment section 12 forms an angle Φ with the horizontal plane where the main body section 11 is located, so that solar radiation enters through the light-transmitting assembly 20, and the reflected light reflected by the adjustment section 12 shines on the third photovoltaic cell assembly 33. It should be noted that the angle Φ can be set to be fixed or adjustable.

[0082] With the above solution, when the incident light deviates greatly from the normal direction of the light-transmitting component 20, the incident light may fall on the side of the device after being reflected by the reflective component 10, so the photovoltaic component 33 is also installed on the side of the device. In addition, an extended end is provided at the end of the reflective component to form an angle with the horizontal plane, so that the angle of the reflected light incident on the third photovoltaic cell component 33 can be adjusted to improve the utilization rate of the reflected light.

[0083] Furthermore, the angle Φ is adjustable, and the angle Φ is:

[0084] Φ=90-15×(ST-12)

[0085] Among them, ST is the solar radiation intensity at the location of use reaching 50W / m 2 The true solar time.

[0086] Specifically, the main body section 11 and the adjustment section 12 on the reflective assembly 10 are rotatably connected by means of axle connection, riveting, etc., so that the angle Φ can be adjusted. ST is measured in 24 hours. True solar time = mean solar time + time difference; mean solar time refers to the time of the country or region for reference at ordinary times, such as Beijing time, whose time interval is equal every day; time difference = (local longitude - 120) / 15.

[0087] By adopting the above scheme, the angle Φ is adjusted according to time, and the sunlight during the period of low solar altitude angle can be reflected to the third photovoltaic cell assembly 33 arranged on one or both sides adjacent to the light-transmitting assembly 20, and the incident angle is increased, thereby improving the utilization rate of the reflected light.

[0088] According to another specific embodiment of the present invention, the length W0 of the adjustment section 12 along the horizontal extension direction of the light-transmitting component 20 is:

[0089] W0=1 / 5×W

[0090] Wherein, W is the length of the reflective component 10 in the horizontal extending direction of the light-transmitting component 20 .

[0091] Specifically, when the third photovoltaic cell assembly 33 is set on one side, the adjustment section 12 is 1 / 5 of the length W of the reflective assembly 10; therefore, the main section 11 occupies 4 / 5 of the length W of the reflective assembly 10, and is used to reflect light to the first photovoltaic cell assembly 31; when the third photovoltaic cell assembly 33 is set on the bright side, the adjustment section 12 is two sections, and the main section 11 occupies 3 / 5 of the length W of the reflective assembly 10, and is used to reflect light to the first photovoltaic cell assembly 31.

[0092] It should be noted that when W is relatively large or small, W0 can also be increased or decreased according to the situation. In addition, the length W0 of the adjustment section 12 in the horizontal extension direction of the light-transmitting component 20 can also be calculated according to other parameters, such as the solar altitude angle when the earliest effective solar radiation is generated at the place of use every day, as long as the utilization rate of sunlight during the period with a lower solar altitude angle can be improved.

[0093] By adopting the above solution, the reflective assembly 20 is mainly used to reflect light to the first photovoltaic cell assembly 31, and part of it is used to reflect light to the third photovoltaic cell assembly 33. The allocation is more reasonable, and the utilization rate of reflected light is improved.

[0094] According to another specific embodiment of the present invention, Figure 4 As shown, the photovoltaic power generation device includes at least two photovoltaic power generation units; the photovoltaic power generation units are arranged adjacent to each other; and the bottom of the shell 40 of one photovoltaic power generation unit is connected to the top of the shell 40 of another photovoltaic power generation unit.

[0095] Specifically, multiple shells 40 are connected to each other at the bottom and top to form a multi-module device, and the overall structure is neat; more specifically, they can be fixedly connected by bonding, welding, etc., or they can be fixedly connected by screwing, pinning, etc. Traditional flat-plate solar photovoltaic power generation devices need to maintain an inclination angle. This structure cannot be widely promoted in green buildings because it occupies a lot of space; the photovoltaic power generation device disclosed in this embodiment can be applied to building curtain walls.

[0096] By adopting the above scheme, multiple photovoltaic power generation units are connected to each other at the bottom and top to form a multi-module device, and the overall structure is neat. The photovoltaic power generation device disclosed in this embodiment can be applied to the curtain wall of a building and installed on the sunny side of the building.

[0097] In a photovoltaic power generation device disclosed in an embodiment of the present invention, the light-transmitting component 20 is a high-light-transmitting glass.

[0098] By adopting the above technical solution, the light transmittance of high-transmittance glass can reach more than 91.5%, which can improve the utilization rate of solar radiation.

[0099] According to another specific embodiment of the present invention, in the photovoltaic power generation device disclosed in the embodiment of the present invention, the reflective component 10 is a glass reflective lens.

[0100] By adopting the above technical solution, the reflectivity of the glass reflective lens can reach 100%, which can improve the utilization rate of reflected light.

[0101] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A photovoltaic power generation device, characterized in that: comprising at least one photovoltaic power generation unit; The photovoltaic power generation unit comprises a housing, a light-transmitting component, a light-reflecting component, a first photovoltaic cell component, a second photovoltaic cell component and a third photovoltaic cell component; An opening is provided on one side of the housing, and the light-transmitting component is provided at the opening; the housing is in a rectangular parallelepiped or cube structure; The reflective component is arranged at the bottom of the shell, and one end of the reflective component is fixedly connected to the bottom of one side of the shell, and the other end is fixedly connected to the other side of the shell relative to the light-transmitting component; and an angle is formed between the reflective component and the horizontal plane where the bottom of the shell is located. ; The angle for: in, is the solar altitude angle at noon at the place of use; The first photovoltaic cell assembly is fixedly connected to the top of the shell at a position opposite to the reflective assembly, and the angle between the first photovoltaic cell assembly and the horizontal plane where the top of the shell is located is β, and 0°≤β≤ ; The β is a fixed value or an adjustable value; and the incident light passing through the light-transmitting component is reflected by the light-reflecting component to the first photovoltaic cell component; The second photovoltaic cell assembly is disposed in the housing at a position opposite to the light-transmitting assembly to receive light reflected by the light-reflecting assembly; The third photovoltaic cell assembly is arranged on a side surface of the housing adjacent to the light-transmitting assembly; the reflective assembly is divided into a main section and an adjustment section along the horizontal extension direction of the light-transmitting assembly, and the adjustment section is arranged on a side of the housing away from the third photovoltaic cell assembly; the adjustment section forms an angle Φ with the horizontal plane where the main section is located; wherein the angle Φ is adjustable, and the angle Φ is: Φ=90-15×(ST-12) Among them, ST is the solar radiation intensity at the location of use reaching 50W / m 2 The true solar time.

2. The photovoltaic power generation device according to claim 1, characterized in that: The height H of the housing is: Wherein, L is the width between the side where the light-transmitting component is located and the other opposite side in the housing, is the solar altitude angle at noon at the location of use, It is the angle formed by the reflective component and the horizontal plane where the bottom of the shell is located.

3. The photovoltaic power generation device according to claim 1, characterized in that: The length W0 of the adjustment section along the horizontal extension direction of the light-transmitting component is: W0=1 / 5×W Wherein, W is the length of the reflective component along the horizontal extending direction of the light-transmitting component.

4. The photovoltaic power generation device according to any one of claims 1 to 3, characterized in that: The photovoltaic power generation device comprises at least two photovoltaic power generation units; each of the photovoltaic power generation units is arranged adjacent to each other; and, The bottom of the housing of one of the photovoltaic power generation units is connected to the top of the housing of the other photovoltaic power generation unit.

5. The photovoltaic power generation device according to any one of claims 1 to 3, characterized in that: The light-transmitting component is a highly light-transmitting glass; the light-reflecting component is a glass reflective lens.

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