Integrated photovoltaic module, photovoltaic roof and glass curtain wall

Abstract

The invention relates to the field of building integrated photovoltaic technology, and particularly provides an integrated photovoltaic module, a photovoltaic roof and a photovoltaic curtain wall, the integrated photovoltaic module comprises a polymerization part used for polymerizing light passing through a gap between two adjacent crystalline silicon cells, the incident end of the polymerization part is located at the gap of the crystalline silicon cells, and the incident end of the polymerization part is located at the gap of the crystalline silicon cells; the diffusion part is used for diffusing the light rays emitted by the polymerization part so as to increase the irradiation surface of the light rays, and the diffusion part is located on the side, away from the crystalline silicon cell, of the polymerization part; according to the integrated photovoltaic module disclosed by the embodiment of the invention, the light passing through the gaps of the crystalline silicon cells is diffused by arranging the polymerization part and the diffusion part, so that the irradiation area of the light is increased, the area of shadows generated by shielding of the crystalline silicon cells indoors is effectively reduced, and the light transmission of the integrated photovoltaic module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building integrated photovoltaics, and in particular to an integrated photovoltaic component, a photovoltaic roof and a glass curtain wall. Background Art

[0002] BIPV modules, also known as photovoltaic modules, are integrated with buildings through photovoltaic cell technology, thereby realizing the photoelectric conversion function of building integration. At present, BIPV modules mainly use two materials: crystalline silicon and cadmium telluride. Crystalline silicon cells have higher power generation efficiency, but poor light transmittance, which affects the architectural aesthetics and indoor lighting; while cadmium telluride modules have better light transmittance, but relatively low power generation efficiency. Although some companies have carried out a certain degree of light transmittance treatment on crystalline silicon cells, it is at the expense of power generation efficiency. Although cadmium telluride modules have good light transmittance, their power generation efficiency is relatively low, resulting in limited power generation capacity of buildings. In addition, cadmium telluride materials have environmental pollution problems, which limits their widespread application in the BIPV field.

[0003] Based on the above problems, the present application proposes an integrated photovoltaic module, a photovoltaic roof and a glass curtain wall. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated photovoltaic module, a photovoltaic roof and a glass curtain wall to solve the problem of poor light transmittance of the current building integrated photovoltaic structure using crystalline silicon cells.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An integrated photovoltaic module comprises a plurality of crystalline silicon cells arranged at intervals, and

[0007] A polymerization part, used for polymerization of light passing through the gap between two adjacent crystalline silicon cells, wherein the incident end of the polymerization part is located at the gap between the crystalline silicon cells;

[0008] The diffusion part is used to diffuse the light emitted by the aggregation part to increase the irradiation surface of the light. The diffusion part is located on a side of the aggregation part away from the crystalline silicon cell.

[0009] Furthermore, the aggregation portion is composed of a concave first parabola, and the diffusion portion is composed of a concave second parabola, wherein the first parabola and the second parabola share a focus, the opening of the first parabola is smaller than the opening of the second parabola and the openings of the two are facing opposite directions, the height of the first parabola is smaller than the height of the second parabola, and the light passing through the gap between the two crystalline silicon cells is focused by the first parabola and then emitted from the second parabola.

[0010] Furthermore, the ratio of the height of the first parabola to the height of the second parabola is 1:2.

[0011] Furthermore, the aggregation part is composed of two symmetrically arranged first reflection surfaces, and the diffusion part is composed of two symmetrically arranged second reflection surfaces, wherein:

[0012] The two first reflecting surfaces form a concave first parabola on the cross section perpendicular to the length direction, and the two second reflecting surfaces form a concave second parabola on the cross section perpendicular to the length direction. The first parabola and the second parabola share a focus, the height of the first parabola is less than the height of the second parabola, and the light passing through the gap between the two crystalline silicon cells is reflected from the first reflecting surface and then reflected from the second parabola.

[0013] Furthermore, a height ratio between the first reflecting surface and the second reflecting surface is 1:2.

[0014] Furthermore, the aggregation part is a first prism, the diffusion part is a second prism, the first prism and the second prism are connected, wherein the first prism shapes the light passing through the gap between the two crystalline silicon cells into parallel light, and the parallel light passes through the second prism and is emitted in a divergent manner.

[0015] Furthermore, one end of the second prism close to the first prism is an aspherical surface, and a large amount of spherical aberration will be generated when the light passes through the aspherical surface, the light in the central area will be reduced, and the light at the edge will be increased; the end of the second prism away from the first prism is a plane, and the light passing through the second prism is refracted at the plane and emitted in a scattered manner to the outside.

[0016] Furthermore, the second prism is arrayed with a plurality of annular saw teeth, and the light is refracted outward on the inclined surfaces of the annular saw teeth. At this time, the first prism is arrayed with a plurality of collimating lenses, and each of the annular saw teeth corresponds to a collimating lens.

[0017] Furthermore, the second prism is arrayed with a plurality of parallel saw teeth, and the light is refracted outward on the inclined surfaces of the parallel saw teeth. At this time, the first convex surface and the second convex surface on the first prism shape the light into linear parallel light.

[0018] Furthermore, the integrated photovoltaic module further comprises:

[0019] A transparent back plate is located at the exit end of the diffusion part.

[0020] Furthermore, a surface of the transparent back plate close to and / or away from the diffusion portion is a frosted surface.

[0021] Furthermore, the integrated photovoltaic module further comprises:

[0022] The focusing part is used to focus the light scattered in the gaps between the adjacent crystalline silicon cells and change the path of the light so that it is incident on the aggregation part.

[0023] Furthermore, the focusing portion includes at least one of a prism, a grating and a lens array.

[0024] The invention also discloses a photovoltaic roof, comprising the above-mentioned integrated photovoltaic assembly.

[0025] The invention also discloses a glass curtain wall, comprising the above-mentioned integrated photovoltaic assembly.

[0026] In summary, the present invention has the following beneficial effects compared with the prior art:

[0027] The present invention discloses an integrated photovoltaic module, which includes a plurality of crystalline silicon cells arranged at intervals, and also includes a polymerization part and a diffusion part. The polymerization part is used to polymerization light passing through the gap between two adjacent crystalline silicon cells, and the incident end of the polymerization part is located at the gap between the crystalline silicon cells; the diffusion part diffuses the light emitted by the polymerization part to increase the irradiation surface of the light, and the diffusion part is located on the side of the polymerization part away from the crystalline silicon cell. Thus, by arranging the polymerization part and the diffusion part to diffuse the light passing through the gap between the crystalline silicon cells, the irradiation area of ​​the light is increased, thereby effectively reducing the shadow area generated by the shading of the crystalline silicon cells in the room, and improving the light transmittance of the integrated photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of an integrated photovoltaic module disclosed in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the integrated photovoltaic assembly and the building disclosed in the embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the structure of the integrated photovoltaic module disclosed in an embodiment of the present invention as a glass curtain wall.

[0031] Figure 4 This is a schematic diagram of the structure of the polymerizing part and the diffusing part in the integrated photovoltaic module disclosed in Example 1 of the present invention.

[0032] Figure 5 Schematic diagram of light propagation in the aggregation part and the diffusion part of the integrated photovoltaic module disclosed in Example 1 of the present invention.

[0033] Figure 6 It is a schematic diagram of light propagation using a grating as a light focusing part in an integrated photovoltaic module disclosed in an embodiment of the present invention.

[0034] Figure 7 It is a schematic diagram of light propagation using a prism as a light focusing part in an integrated photovoltaic module disclosed in an embodiment of the present invention.

[0035] Figure 8 It is a schematic diagram of light propagation using a lens array as a light focusing part in an integrated photovoltaic assembly disclosed in an embodiment of the present invention.

[0036] Fig. 9 This is a schematic diagram of the structure of the polymerizing part and the diffusing part in the integrated photovoltaic module disclosed in Example 2 of the present invention.

[0037] Fig.10 This is a schematic diagram of the structure of the polymerizing part and the diffusing part in the integrated photovoltaic module disclosed in Example 3 of the present invention.

[0038] Fig.11 This is a schematic structural diagram of the annular serrations in the diffuser portion of the integrated photovoltaic module disclosed in Example 2 of the present invention.

[0039] Fig.12 This is a cross-sectional view of the diffusion portion of the integrated photovoltaic module disclosed in Example 2 of the present invention.

[0040] Fig.13 This is a schematic structural diagram of the parallel sawtooth structure in the diffuser of the integrated photovoltaic module disclosed in Example 2 of the present invention.

[0041] Reference numerals:

[0042] 110, crystalline silicon cell; 120, polymerization part; 121, first parabola; 122, first reflecting surface; 130, diffusion part; 131, second parabola; 132, second reflecting surface; 140, photovoltaic glass; 150, focusing part; 151, grid; 152, prism; 153, lens array; 160, transparent back plate; 210, buckle strip; 220, limit pad; 230, photovoltaic junction box; 240, terminal; 310, first prism; 311, first convex surface; 312, second convex surface; 320, second prism; 321, sawtooth; 330, connector. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] BIPV modules, also known as photovoltaic modules, are integrated with buildings through photovoltaic cell technology, thereby realizing the photoelectric conversion function of building integration. At present, BIPV modules mainly use two materials: crystalline silicon and cadmium telluride. Crystalline silicon cells have high power generation efficiency, but poor light transmittance, which affects architectural aesthetics and indoor lighting; while cadmium telluride modules have good light transmittance, but relatively low power generation efficiency. Although some companies have carried out a certain degree of light transmittance treatment on crystalline silicon cells, it is at the expense of power generation efficiency. Although cadmium telluride modules have good light transmittance, their power generation efficiency is relatively low, resulting in limited power generation capacity of buildings. In addition, cadmium telluride materials have environmental pollution problems, which limits their widespread application in the BIPV field.

[0045] To this end, the present invention proposes an integrated photovoltaic module, which includes a plurality of crystalline silicon cells 110 arranged at intervals, and also includes a polymerization part 120 and a diffusion part 130. The polymerization part 120 aggregates the light passing through the gap between two adjacent crystalline silicon cells 110, and the incident end of the polymerization part 120 is located at the gap between the crystalline silicon cells 110; the diffusion part 130 diffuses the light emitted from the polymerization part 120 to increase the irradiation surface of the light, and the diffusion part 130 is located on the side of the polymerization part 120 away from the crystalline silicon cells 110. Therefore, by providing the polymerization part 120 and the diffusion part 130 to diffuse the light passing through the gap between the crystalline silicon cells 110, the irradiation area of ​​the light is increased, thereby effectively reducing the area of ​​the shadow generated by the shading of the crystalline silicon cells 110 in the room, and improving the light transmittance of the integrated photovoltaic module.

[0046] The specific scheme of the embodiment of the present application is described in detail below:

[0047] Example 1

[0048] like Figure 1 As shown, the present embodiment discloses an integrated photovoltaic module, including a plurality of crystalline silicon cells 110 arranged at intervals, a polymerization portion 120, and a diffusion portion 130, wherein the polymerization portion 120 is used to aggregate light passing through a gap between two adjacent crystalline silicon cells 110, and an incident end of the polymerization portion 120 is located at the gap between the crystalline silicon cells 110; the diffusion portion 130 is used to diffuse the light emitted from the polymerization portion 120 to increase the irradiation surface of the light, and the diffusion portion 130 is located on a side of the polymerization portion 120 away from the crystalline silicon cell 110.

[0049] In this embodiment, if Figure 2 As shown, the integrated photovoltaic module is installed on a building, such as a building roof. Figure 4When sunlight irradiates the crystalline silicon cell 110, the crystalline silicon cell 110 generates electricity. The sunlight irradiated between the gaps of the crystalline silicon cells 110 irradiates into the aggregation part 120 from the gaps of the crystalline silicon cells 110 and is reflected in the aggregation part 120. The light reflected by the aggregation part 120 enters the diffusion part 130. When the light is reflected by the diffusion part 130, the irradiation area of ​​the light increases. The light emitted from the adjacent diffusion parts 130 intersects indoors, thereby improving the indoor lighting effect.

[0050] The integrated photovoltaic module disclosed in the embodiment of the present invention diffuses the light passing through the gaps between the crystalline silicon cells 110 by providing the aggregation part 120 and the diffusion part 130, so as to increase the irradiation area of ​​the light and improve the light transmittance of the photovoltaic module.

[0051] Specifically, in this embodiment, the crystalline silicon cell 110 is the prior art, the polymerization part 120 and the diffusion part 130 are fixedly connected to the crystalline silicon cell 110, the multiple crystalline silicon cells 110 are electrically connected through wires, the multiple crystalline silicon cells 110 are arranged on the same plane, and the photovoltaic module composed of the multiple crystalline silicon cells 110 is the prior art (such as the technology of crystalline silicon cells forming a single photovoltaic power generation panel in the prior art), and at least one photovoltaic junction box 230 is arranged on each photovoltaic module composed of the crystalline silicon cells 110 for connecting multiple photovoltaic modules.

[0052] As a preferred implementation in this embodiment, Figure 4 As shown, the aggregation portion 120 is composed of a concave first parabola 121, and the diffusion portion 130 is composed of a concave second parabola 131, wherein the first parabola 121 and the second parabola 131 share a focus, the opening of the first parabola 121 is smaller than the opening of the second parabola 131 and the openings of the two face opposite directions, the height of the first parabola 121 is smaller than the height of the second parabola 131, and the light passing through the gap between the two crystalline silicon cells is focused by the first parabola 121 and then emitted from the second parabola 131.

[0053] Specifically, in this embodiment, Figure 4 and Figure 5 As shown, the aggregation part 120 and the diffusion part 130 form a cylindrical structure, and a plurality of the aggregation parts 120 and the diffusion parts 130 are arranged in the gap between each of the crystalline silicon cells 110. The aggregation parts 120 and the diffusion parts 130 are processed by stamping. The light passing through the crystalline silicon cell 110 is incident on the first parabola 121, and is reflected at the first parabola 121 to the second parabola 131, and then reflected at the second parabola 131, and then emitted from the second parabola 131 to irradiate into the room.

[0054] The sunlight irradiating the photovoltaic module can be approximated as parallel light. Since the opening of the first parabola 121 is smaller than the opening of the second parabola 131 and the two share a focus, when sunlight directly enters the aggregation portion 120, the light incident on the first parabola 121 will be gathered at the focus and transmitted to the second parabola 131 after being reflected by the first parabola 121, and reflected into the room at the second parabola 131. Since the opening of the second parabola 131 is larger than the opening of the first parabola 121, the reflection angle of the light path on the second parabola 131 is greater than the reflection angle of the light on the first parabola 121, so that the irradiation area of ​​the light reflected by the second parabola 131 changes, thereby diffusing the light. In this embodiment, the aggregation portion 120 and the diffusion portion 130 form a cylindrical compound parabolic concentrator, the aggregation portion 120 is the exit end of the traditional compound parabolic concentrator, and the diffusion portion 130 is the incident end of the traditional compound parabolic concentrator. The present application utilizes the compound parabolic concentrator in reverse (i.e., reversely utilizes the focusing principle to produce a scattered light effect) to disperse the light entering the aggregation portion 120 and the diffusion portion 130, thereby increasing the illumination area of ​​the light and improving the indoor lighting effect.

[0055] The acceptance half-angle is the maximum half-angle range of the incident light that the optical device can accept. The half-angle refers to half of the angle between the incident light and the optical axis. In an optical system, the acceptance half-angle determines the maximum deviation angle of the incident light that the system can receive. If the half-angle of the incident light exceeds the acceptance half-angle of the optical device, the light will not be received by the system or effectively focused. Accordingly, for light that is not directly incident into the aggregation portion 120, if the incident angle is less than the acceptance half-angle of the first parabola 121, the light can be reflected and then incident into the second parabola 131, and the light whose incident angle is greater than the acceptance half-angle of the first parabola 121 will escape from the opening of the first parabola 121 after multiple reflections.

[0056] In this embodiment, the receiving half-angle is the angle between the light incident on the edge of the parabola and the central axis of the parabola. It is a key parameter for describing the compound parabolic concentrator. It defines the maximum angle range in which the compound parabolic concentrator can receive light. When the incident angle of the incident light is less than or equal to the receiving half-angle, the light can be effectively reflected by the compound parabolic concentrator and focused onto the absorber. Incident light exceeding this angle will not be received by the absorber, but may escape from the light-collecting port of the compound parabolic concentrator.

[0057] Preferably, in the embodiment, the curvature radius of the aggregation part 120 is between 75 mm and 85 mm, and the curvature radius of the diffusion part 130 is between 85 mm and 95 mm. The ratio of the height of the first parabola 121 to the height of the second parabola 131 is 1:2, thereby ensuring that the aggregation part 120 and the diffusion part 130 can effectively reflect light, so that the irradiation area of ​​the light entering the room is increased, thereby achieving the purpose of improving the light transmittance of the integrated photovoltaic module.

[0058] In this embodiment, the aggregation portion 120 and the diffusion portion 130 are processed by stamping mirror aluminum, and the thickness of the aggregation portion 120 and the diffusion portion 130 can be between 0.15 mm and 0.5 mm.

[0059] In this embodiment, the aggregation part 120 and the diffusion part 130 can be fixedly connected to the crystalline silicon cell 110 by gluing, such as encapsulating glass panels are provided on the front and back sides of the crystalline silicon cell 110, so that a plurality of the crystalline silicon cells 110 form a whole photovoltaic panel, and one end of the aggregation part 120 is fixed to the glass panel by a transparent structural adhesive.

[0060] In the prior art, the estimated power generation per square meter of a cadmium telluride module with a light transmittance of 40% is 85W, and the estimated power generation per square meter of a crystalline silicon cell is 160W. In this embodiment, by setting the spacing between the crystalline silicon cells 110, the gap between the two crystalline silicon cells 110 reaches 40% of the crystalline silicon cell, and the light utilization rate of the present application is 60%, then the power generation per square meter is 160X60%=96W, which is about 13% higher than the power generation of the cadmium telluride module in the prior art. Under the same light transmittance, the power generation of the present application is greater than that of the traditional cadmium telluride module, while also avoiding the problem of pollution.

[0061] As a preferred implementation in this embodiment, Figure 1 As shown, the integrated photovoltaic assembly further includes a transparent back plate 160 , and the transparent back plate 160 is located at the exit end of the diffusion part 130 .

[0062] Specifically, in the present embodiment, the transparent backplane 160 is located at the end of the diffusion part 130, and the transparent backplane 160 is fixedly connected to the diffusion part 130 by a transparent structural adhesive. The crystalline silicon cell 110 and the transparent backplane 160 can be fixed by a frame structure for encapsulating photovoltaic cells. The transparent backplane 160 is used to encapsulate the photovoltaic module. In the present embodiment, the transparent backplane 160 plays a role in fixing the polymerization part 120 and the diffusion part 130, and also plays a certain sealing role, thereby reducing the possibility of dust and water entering the integrated photovoltaic module.

[0063] Preferably, in this embodiment, the side of the transparent back plate 160 close to and / or away from the diffuser 130 is a frosted surface. For ease of description, the side of the transparent back plate 160 attached to the diffuser 130 is recorded as side A, and the other side of the transparent back plate 160 is recorded as side B. In the embodiment, one or both of the side A and side B of the transparent back plate 160 are frosted surfaces, and the light irradiated onto the transparent back plate 160 is scattered on the frosted surface, making the light entering the room softer.

[0064] In this embodiment, the transparent back plate 160 may be a glass back plate or may be made of other materials, such as an acrylic transparent plate.

[0065] As a preferred implementation in this embodiment, Figure 1 As shown, the integrated photovoltaic assembly further includes a focusing portion 150 for focusing light scattered at the gaps between the adjacent crystalline silicon cells 110 and changing the path of the light so as to allow the light to be incident on the aggregation portion 120 .

[0066] Specifically, in this embodiment, the focusing portion 150 refracts or diffracts the light originally larger than the receiving half angle so that the incident angle of the refracted or diffracted light is smaller than the receiving half angle, thereby guiding the light to the aggregation portion 120 .

[0067] In this embodiment, the light focusing unit 150 may be a prism 152 , a grating, and a lens array 153 .

[0068] like Figure 6 As shown, when the focusing portion 150 is a grating, the grating is a transmission grating, and when the light is irradiated on the fine lines / grooves on the grating, diffraction occurs on the fine lines / grooves to form a plurality of diffraction orders, so as to guide the light into the aggregation portion 120;

[0069] In this embodiment, the optical device composed of a large number of parallel slits of equal width and equal spacing is called a grating. The commonly used grating is made by engraving a large number of parallel grooves on a glass sheet. The grooves are opaque parts, and the smooth part between two grooves can transmit light, which is equivalent to a slit. A refined grating has thousands or even tens of thousands of grooves within a width of 1 cm. This kind of diffraction grating using transmitted light is called a transmission grating.

[0070] like Figure 7 As shown, when the light focusing portion 150 is a prism 152, the light irradiated on the prism 152 is refracted in the prism 152, thereby changing the propagation angle of the light, and then guiding the light to the aggregation portion 120. The prism 152 can be a triangular prism 152 or a plano-convex lens;

[0071] In this embodiment, the prism 152 is a transparent optical element whose cross-section is usually a triangle or other polygonal shape and is made of a transparent material with a uniform refractive index. The main function of the prism 152 is to use the principle of light refraction to change the propagation direction of light, separate the wavelength of light (dispersion) or analyze the composition of light.

[0072] like Figure 8 As shown, when the aggregation portion 120 is a lens array 153, the lens array 153 utilizes the refraction of light to allow the light to irradiate into the aggregation portion 120, and the lens array 153 is composed of a plurality of convex lenses.

[0073] The integrated photovoltaic module of the present invention can be applied to the roof structure and can also be applied to the glass curtain wall. Figure 3 As shown, taking the application in glass curtain wall as an example, when the photovoltaic assembly in this embodiment is applied to the glass curtain wall, the integrated photovoltaic assembly is fixed to the aluminum alloy horizontal frame of the glass curtain wall through the buckle strip 210. The buckle strip 210 is fixed to the aluminum alloy horizontal frame by screws, and an EPDM adhesive strip is arranged between the integrated photovoltaic assembly and the buckle strip 210, which is used to adhere the photovoltaic assembly and the buckle strip 210. The photovoltaic junction box 230 of the photovoltaic assembly is fixed to the aluminum alloy horizontal frame by silicone structural adhesive, and the photovoltaic junction box is provided with a terminal 240 for inputting electricity. A limit pad 220 is also arranged on the aluminum alloy buckle strip 210 adjacent to the photovoltaic assembly, and the limit pad 220 is fixed to the photovoltaic assembly located on the higher side, and the limit pad 220 can buffer, seal and locate the installation position.

[0074] In some examples, the spacing between adjacent crystalline silicon cells 110 is set at 29 mm. Thus, the spacing can provide enough space for light to pass through. On the contrary, when sunlight shines on the crystalline silicon cell 110, if the spacing between the components is too small, the light cannot pass through effectively. In addition, the setting of the spacing can also avoid ensuring the power generation efficiency of the crystalline silicon cell 110, and ensure that the crystalline silicon cell 110 can cover the roof or the exterior wall of the building as much as possible.

[0075] In some examples, the transparent back plate 160 may be set to have a thickness of 10 mm, the height of the aggregation portion 120 may be 20 mm, and the height of the diffusion portion 130 may be 40 mm.

[0076] Example 2

[0077] like Figure 4As shown, as another embodiment of the present invention, this embodiment discloses an integrated photovoltaic module, including a plurality of crystalline silicon cells 110 arranged at intervals, a polymerization portion 120, and a diffusion portion 130, wherein the polymerization portion 120 is used to aggregate light passing through a gap between two adjacent crystalline silicon cells 110, and an incident end of the polymerization portion 120 is located at the gap between the crystalline silicon cells 110; the diffusion portion 130 is used to diffuse the light emitted from the polymerization portion 120 to increase the irradiation surface of the light, and the diffusion portion 130 is located on a side of the polymerization portion 120 away from the crystalline silicon cell 110.

[0078] The difference between this embodiment and Embodiment 1 is that the aggregation portion 120 is composed of two symmetrically arranged first reflection surfaces 122, and the diffusion portion 130 is composed of two symmetrically arranged second reflection surfaces 132, wherein the two first reflection surfaces 122 form a concave first parabola in the cross section perpendicular to the length direction, and the two second reflection surfaces 132 form a concave second parabola in the cross section perpendicular to the length direction, the first parabola and the second parabola share a focus, the height of the first parabola is smaller than the height of the second parabola, and the light passing through the gap between the crystalline silicon cells is reflected from the first reflection surface 122 and then reflected from the second parabola 131.

[0079] Specifically, Fig. 9 As shown, the aggregation part 120 and the diffusion part 130 can be composed of two symmetrically arranged reflection plates, the reflection plates are bent plate structures, each of the reflection plates is provided with a first reflection surface 122 and a second reflection surface 132, the first reflection surface 122 is arranged at a position close to the crystalline silicon cell 110, and the second reflection surface 132 is arranged at a position away from the crystalline silicon cell 110, the first emitting surface and the second reflecting surface 132 are both partially parabolic in cross-section perpendicular to the long axis, the cross-section of the symmetrically arranged first emitting surface forms a first parabola, and the symmetrically arranged second reflecting surface 132 forms a second parabola, and two reflection plates are arranged in the gap between adjacent crystalline silicon cells 110, the aggregation part 120 and the diffusion part 130 are processed by stamping, the light passing through the crystalline silicon cell 110 is incident on the first reflection surface 122, and is reflected at the first reflection surface 122 to the second reflection surface 132, and then reflected at the second reflection surface 132, and then emitted from the second reflection surface 132 to irradiate into the room.

[0080] The sunlight irradiated on the integrated photovoltaic module is approximately parallel light, the opening formed by the two first reflecting surfaces 122 is smaller than the opening formed by the two second reflecting surfaces 132, and the first parabola and the second parabola share a focus. When the sunlight directly enters the aggregation part 120, the light incident on the first reflecting surface 122 will pass through the common focus of the first parabola and the second parabola after being reflected by the first reflecting surface 122, and then be transmitted to the second reflecting surface 132, and reflected into the room at the second reflecting surface 132. Since the opening formed by the two second reflecting surfaces 132 is larger than the opening formed by the two first reflecting surfaces 122, the reflection angle of the light path on the second parabola 131 is greater than the reflection angle of the light on the first parabola 121, so that the irradiation area of ​​the light reflected by the second reflecting surface 132 is increased, thereby diffusing the light. In this embodiment, the aggregation part 120 and the diffusion part 130 form a plate-shaped compound parabolic concentrator. The aggregation part 120 is the output end of a traditional compound parabolic concentrator, and the diffusion part 130 is the incident end of a traditional compound parabolic concentrator. The present application disperses the light entering the aggregation part 120 and the diffusion part 130 by reversely utilizing the compound parabolic concentrator (i.e., reversely utilizing the focusing principle to produce an astigmatism effect).

[0081] For light that is not directly incident into the aggregation portion 120 , light with an incident angle less than the acceptance half angle will directly / after reflection enter the second reflection surface 132 , and light with an incident angle greater than the acceptance half angle will escape from the opening of the first reflection surface 122 after multiple reflections.

[0082] In this embodiment, the receiving half-angle is the angle between the light incident on the edge of the first reflecting surface 122 and the symmetry axes of the two first reflecting surfaces 122. When the incident angle of the incident light is less than or equal to the receiving half-angle, the light can be effectively reflected by the compound parabolic concentrator and focused onto the absorber. Incident light exceeding this angle will not be received by the absorber, but may escape from the light-collecting port of the compound parabolic concentrator.

[0083] Preferably, in the embodiment, the radius of curvature of the first reflecting surface 122 is between 75 mm and 85 mm, and the radius of curvature of the second reflecting surface 132 is between 85 mm and 95 mm. The ratio of the height of the first reflecting surface 122 to the height of the second reflecting surface 132 is 1:2, such as the height of the first reflecting surface 122 is 20 mm, and the height of the second reflecting surface 132 is 40 mm.

[0084] In this embodiment, the polymerizing portion 120 and the diffusion portion 130 are processed by stamping mirror aluminum, and the thickness of the polymerizing portion 120 and the diffusion portion 130 is between 0.15 mm and 0.5 mm; the reflective plate is fixedly connected to the crystalline silicon cell 110 / transparent backplane 160 through a structure.

[0085] In this embodiment, the structure of this embodiment except the aggregation part 120 and the diffusion part 130 is the same as that of the first embodiment.

[0086] Example 3

[0087] like Fig.10 As shown, as another embodiment of the present invention, this embodiment discloses an integrated photovoltaic module, including a plurality of crystalline silicon cells 110 arranged at intervals, a polymerization portion 120, and a diffusion portion 130, wherein the polymerization portion 120 is used to aggregate light passing through a gap between two adjacent crystalline silicon cells 110, and an incident end of the polymerization portion 120 is located at the gap between the crystalline silicon cells 110; the diffusion portion 130 is used to diffuse the light emitted from the polymerization portion 120 to increase the irradiation surface of the light, and the diffusion portion 130 is located on a side of the polymerization portion 120 away from the crystalline silicon cell 110.

[0088] The difference between this embodiment and embodiment 1 is that the aggregation part 120 is a first prism 310, the diffusion part 130 is a second prism 320, the first prism 310 and the second prism 320 are connected, wherein the first prism 310 shapes the light passing through the gap between the crystalline silicon cells into parallel light, and the parallel light passes through the second prism 320 and is emitted in a divergent manner.

[0089] Specifically, in this embodiment, Fig.10 As shown, the first prism 310 includes a first convex surface 311 and a second convex surface 312. The light incident on the first convex surface 311 is focused in the first prism 310 and then emitted from the second convex surface 312 as parallel light and incident on the second prism 320.

[0090] The end of the second prism 320 close to the first prism 310 is an aspherical surface. When the light passes through the aspherical surface, a large amount of spherical aberration will be generated, and the light path will be redistributed, the light in the central area will be reduced, and the light at the edge will be increased, so as to form a uniform light path; the end of the second prism 320 away from the first prism 310 is a plane. The light passing through the second prism 320 will be refracted at the plane and emitted in a scattered manner to the outside, thereby diverging the light and improving the uniformity of the indoor light. The first prism 310 shapes the light into linear parallel light, and the second prism 320 diverges and emits like parallel light, thereby causing light diffusion;

[0091] In this embodiment, the parameters of the aspheric surface may refer to the aspheric surface of a Powell lens.

[0092] In this embodiment, the first prism 310 and the second prism 320 are connected by a connecting member 330 . The connecting member 330 is a plastic or aluminum alloy plate. The connecting member 330 is fixed to the first prism 310 and the second prism 320 by structural adhesive.

[0093] As another preferred implementation in this embodiment, Fig.12 As shown, the second prism 320 has two forms:

[0094] The first one, such as Fig.11 and Fig.12 As shown, a plurality of annular saw teeth 321 are arrayed on the second prism 320, and light is refracted outward on the inclined surface of the annular saw teeth 321. At this time, a plurality of collimating lenses are arrayed on the first prism 310, and each of the annular saw teeth 321 corresponds to a collimating lens. Each annular saw tooth 321 of the second prism 320 can be regarded as a circular light source, and the light diverging from the annular saw teeth 321 is evenly irradiated into the room.

[0095] The second type, such as Fig.12 and Fig.13 As shown, a plurality of parallel saw teeth 321 are arrayed on the second prism 320, and the light is refracted outward on the inclined surfaces of the parallel saw teeth 321. At this time, the first convex surface 311 and the second convex surface 312 on the first prism 310 shape the light into linear parallel light. The second prism 320 can be regarded as a long strip light source, and the light emitted from the second prism 320 is evenly irradiated into the room.

[0096] Example 4

[0097] The embodiment of the present invention further discloses a photovoltaic roof, comprising the integrated photovoltaic components described in Embodiments 1 to 3.

[0098] Example 5

[0099] The embodiment of the present invention further discloses a glass curtain wall, comprising the integrated photovoltaic components described in Embodiments 1 to 3.

[0100] In summary, the present invention provides an integrated photovoltaic module including a plurality of crystalline silicon cells 110 arranged at intervals, and also including a polymerization part 120 and a diffusion part 130. The polymerization part 120 aggregates the light passing through the gap between two adjacent crystalline silicon cells 110, and the incident end of the polymerization part 120 is located at the gap between the crystalline silicon cells 110; the diffusion part 130 diffuses the light emitted by the polymerization part 120 to increase the irradiation surface of the light, and the diffusion part 130 is located on the side of the polymerization part 120 away from the crystalline silicon cell 110. Therefore, by providing the polymerization part 120 and the diffusion part 130 to diffuse the light passing through the gap between the crystalline silicon cells 110, so that the irradiation area of ​​the light is increased, thereby effectively reducing the area of ​​the shadow generated by the shading of the crystalline silicon cells 110 in the room, and improving the light transmittance of the integrated photovoltaic module.

[0101] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0102] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0103] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0104] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated photovoltaic module, comprising a plurality of crystalline silicon cells arranged at intervals, characterized in that: Also includes: A polymerization part, used for polymerization of light passing through the gap between two adjacent crystalline silicon cells, wherein the incident end of the polymerization part is located at the gap between the crystalline silicon cells; A diffusion part, used for diffusing the light emitted from the aggregation part to increase the irradiation surface of the light, and the diffusion part is located on a side of the aggregation part away from the crystalline silicon cell; The aggregation portion is composed of a concave first parabola, and the diffusion portion is composed of a concave second parabola, wherein the first parabola and the second parabola share a focus, the opening of the first parabola is smaller than the opening of the second parabola and the two openings face opposite directions, the height of the first parabola is smaller than the height of the second parabola, and the light passing through the gap between the two crystalline silicon cells is focused by the first parabola and then emitted from the second parabola.

2. The integrated photovoltaic module according to claim 1, characterized in that: The ratio of the height of the first parabola to the height of the second parabola is 1:

2.

3. The integrated photovoltaic module according to claim 1, characterized in that: The aggregation part is composed of two symmetrically arranged first reflection surfaces, and the diffusion part is composed of two symmetrically arranged second reflection surfaces, wherein: The two first reflecting surfaces form a concave first parabola on the cross section perpendicular to the length direction, and the two second reflecting surfaces form a concave second parabola on the cross section perpendicular to the length direction. The first parabola and the second parabola share a focus, the height of the first parabola is less than the height of the second parabola, and the light passing through the gap between the crystalline silicon cells is reflected by the first reflecting surface and then reflected from the second parabola.

4. The integrated photovoltaic module according to claim 3, characterized in that: The height ratio of the first reflecting surface to the second reflecting surface is 1:

2.

5. The integrated photovoltaic module according to claim 1, characterized in that: The aggregation part is a first prism, the diffusion part is a second prism, the first prism and the second prism are connected, wherein, The first prism shapes the light passing through the gap between the crystalline silicon cells into parallel light, and the parallel light passes through the second prism and is emitted in a divergent manner.

6. The integrated photovoltaic module according to claim 5, characterized in that: The end of the second prism close to the first prism is an aspherical surface. When light passes through the aspherical surface, a large amount of spherical aberration will be generated, the light in the central area will be reduced, and the light at the edge will be increased; the end of the second prism away from the first prism is a plane, and the light passing through the second prism is refracted at the plane and emitted in a scattered outward manner.

7. The integrated photovoltaic module according to claim 5, characterized in that: The second prism is arrayed with a plurality of annular saw teeth, and the light is refracted outward on the inclined surfaces of the annular saw teeth. At this time, the first prism is arrayed with a plurality of collimating lenses, and each of the annular saw teeth corresponds to a collimating lens.

8. The integrated photovoltaic module according to claim 5, characterized in that: The second prism has a plurality of parallel saw teeth arrayed thereon, and the light is refracted outward on the inclined surfaces of the parallel saw teeth. At this time, the first convex surface and the second convex surface on the first prism shape the light into linear parallel light.

9. The integrated photovoltaic module according to any one of claims 1 to 8, characterized in that: The integrated photovoltaic module also includes: A transparent back plate is located at the exit end of the diffusion part.

10. The integrated photovoltaic module according to claim 9, characterized in that: A surface of the transparent back plate close to and / or away from the diffusion portion is a frosted surface.

11. The integrated photovoltaic module according to any one of claims 1 to 8, characterized in that: The integrated photovoltaic module also includes: The focusing part is used to focus the light scattered in the gaps between the adjacent crystalline silicon cells and change the path of the light so that it is incident on the aggregation part.

12. The integrated photovoltaic module according to claim 11, characterized in that: The light focusing portion includes at least one of a prism, a grating and a lens array.

13. A photovoltaic roof, characterized in that: Comprising the integrated photovoltaic module as described in any one of claims 1-12.

14. A glass curtain wall, characterized in that: Comprising the integrated photovoltaic module as described in any one of claims 1-12.

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