Frame, photovoltaic cell module and photovoltaic cell module array

Abstract

The utility model provides a frame, a photovoltaic cell assembly and a photovoltaic cell assembly array, and relates to the field of photovoltaic technology. The frame comprises a first frame section, a second frame section and a third frame section which define an accommodating space, and the accommodating space is used for accommodating part of the edge of the photovoltaic panel; at least part of the first frame section is used for fitting a light receiving surface of a photovoltaic panel, and at least part of the third frame section is used for fitting a backlight surface of the photovoltaic panel; the first frame section is provided with a second surface and a first surface deviating from the third frame section, the first surface is opposite to the second surface, the first surface is provided with a curved reflective surface, and the reflective surface extends to the second surface in the direction away from the second frame section; the reflective surface is provided with a rough surface and a smooth surface which are distributed away from the second frame section. The frame provided by the utility model can improve the light utilization rate of the photovoltaic cell assembly and increase the power.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a frame, a photovoltaic cell assembly, and a photovoltaic cell assembly array. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] The frame of a photovoltaic cell module is usually an aluminum alloy frame, which will reflect most of the sunlight outside the photovoltaic cell module, resulting in a waste of photovoltaic cell module area, insufficient utilization of sunlight, and low power gain.

[0004] In the related art, the frame of the photovoltaic cell module is designed to reflect part of the sunlight onto the photovoltaic panel to improve the photoelectric conversion efficiency. However, part of the reflected light is still reflected outside the photovoltaic cell module and is difficult to be used. Utility Model Content

[0005] The utility model aims to provide a frame, a photovoltaic cell assembly, and a photovoltaic cell assembly array to solve the technical problem that the frame of the photovoltaic cell assembly has a low utilization rate for reflected light.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a frame for packaging a photovoltaic panel, the frame comprising a first frame segment, a second frame segment and a third frame segment enclosing a receiving space, the receiving space being used to receive at least part of an edge of the photovoltaic panel;

[0008] At least a portion of the first frame segment is used to fit the light-receiving surface of the photovoltaic panel, and at least a portion of the third frame segment is used to support the backlight surface of the photovoltaic panel;

[0009] The first frame segment has a second surface and a first surface facing away from the third frame segment, the first surface is opposite to the second surface, the first surface has a curved reflective surface, and the reflective surface extends to the second surface in a direction away from the second frame segment;

[0010] The reflective surface has a rough surface and a smooth surface distributed along a direction away from the second frame segment.

[0011] According to at least one embodiment of the present utility model, the sum of the central angle corresponding to the rough surface and the central angle corresponding to the smooth surface is greater than or equal to 70° and less than or equal to 90°.

[0012] According to at least one embodiment of the present invention, the rough surface is a wavy rough surface, and each crest and trough of the rough surface is distributed in a direction away from the second frame segment; or,

[0013] The rough surface is the surface of the diffuse reflection coating.

[0014] According to at least one embodiment of the present utility model, the rough surface is a rough surface formed by a plurality of continuous protrusions, and the protrusions are semicircular protrusions.

[0015] According to at least one embodiment of the present invention, the radius of curvature of the rough surface is greater than or equal to the radius of curvature of the smooth surface.

[0016] According to at least one embodiment of the present utility model, the curvature radius of the rough surface is equal to the curvature radius of the smooth surface, the smooth surface has a first arc segment, and the rough surface has a second arc segment corresponding to the first arc segment;

[0017] The ratio of the arc length of the second arc segment to the arc length of the first arc segment is (0.89-1.11):1.

[0018] According to at least one embodiment of the present utility model, the first surface further has a planar straight surface, the straight surface and the reflective surface are distributed in a direction away from the second frame segment, and the reflective surface is a 1 / 4 circle arc surface.

[0019] According to at least one embodiment of the present utility model, the sum of the arc length of the second arc segment and the arc length of the first arc segment is 8.9 mm to 9.6 mm.

[0020] According to at least one embodiment of the present invention, the rough surface and / or the smooth surface has a reflective layer for improving reflectivity.

[0021] According to at least one embodiment of the present utility model, the frame is a rectangular frame, and the frame has two first frames arranged opposite to each other and two second frames arranged opposite to each other;

[0022] The curvature radius of the rough surface of the first frame and the rough surface of the second frame are the same or different; and / or,

[0023] The curvature radius of the smooth surface of the first frame and the curvature radius of the smooth surface of the second frame are the same or different.

[0024] In a second aspect, the utility model provides a photovoltaic cell assembly, comprising a photovoltaic panel and the frame described in the first aspect, wherein the photovoltaic panel is encapsulated in the frame.

[0025] In a third aspect, the utility model provides a photovoltaic cell assembly array, comprising at least one photovoltaic cell assembly according to the second aspect, wherein the frame comprises two first frames arranged opposite to each other and two second frames arranged opposite to each other, the first frames are parallel to the ground, and the second frames are at a preset angle to the ground;

[0026] The curvature radius of the rough surface of the first frame is greater than or equal to the curvature radius of the rough surface of the second frame; and / or,

[0027] A radius of curvature of the smooth surface of the first frame is greater than or equal to a radius of curvature of the smooth surface of the second frame.

[0028] Among the one or more technical solutions provided in the exemplary embodiments of the present utility model, at least one of the following beneficial effects can be achieved.

[0029] The frame used for photovoltaic panel packaging in the exemplary embodiment of the utility model includes a first frame segment, a second frame segment and a third frame segment, and the three frame segments enclose a storage space for accommodating a portion of the edge of the photovoltaic panel, wherein a portion of the first frame segment is attached to the light-receiving surface of the photovoltaic panel, the second frame segment is opposite to the corresponding side of the photovoltaic panel, and a portion of the third frame segment is used to support the backlight surface of the photovoltaic panel. The first frame segment has a first surface and a second surface relative to each other, and the first surface is a surface away from the third frame segment. Among them, the first surface has a curved reflective surface, and the reflective surface extends to the second surface along the direction away from the second frame segment, that is, the sunlight irradiated on the reflective surface is reflected as much as possible to the light-receiving surface of the photovoltaic panel. The reflective surface of the exemplary embodiment of the utility model is distributed with a rough surface and a smooth surface along the direction away from the second frame segment. The smooth surface is arranged at the position of the rough surface on the reflective surface, and the rough surface can change the reflection direction of the sunlight, so that part of the sunlight originally reflected at this position is reflected to the inside of the photovoltaic cell assembly, thereby improving the utilization rate of light, and then improving the power of the photovoltaic cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principles of the present invention together with the description thereof, wherein these drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification;

[0031] Figure 1 is a schematic diagram of a frame structure according to an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of the frame (with light path) structure according to the implementation mode of the utility model;

[0033] Figure 3It is a schematic diagram of a partial structure of a frame according to an embodiment of the utility model;

[0034] Figure 4 It is a schematic diagram of the photovoltaic cell assembly array structure according to the implementation mode of the utility model;

[0035] Figure 5 It is a schematic diagram of the photovoltaic cell assembly array structure according to another embodiment of the present utility model.

[0036] Figure numerals: 10, first frame segment; 11, first surface; 12, second surface; 111, smooth surface; 112, rough surface; 112a, protrusion; 113, flat surface; 20, second frame segment; 30, third frame segment; 40, photovoltaic panel; 51, first frame; 52, second frame. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] At present, the surface morphology of the photovoltaic cell module frame facing the sunlight used in the photovoltaic cell module reflects most of the sunlight outside the photovoltaic cell module, resulting in a waste of the photovoltaic cell module area.

[0039] In the related art, the relative position between the reflective surface of the photovoltaic cell module frame and the photovoltaic cell module is unreasonable, resulting in part of the reflected light being reflected only to the outside of the photovoltaic cell module, resulting in low light utilization.

[0040] In response to the above problems, the reflective surface of the photovoltaic cell assembly frame provided by the exemplary embodiment of the utility model is set as a combination of a rough surface and a smooth surface. The rough surface allows part of the sunlight that was originally reflected at this position to be reflected into the photovoltaic cell assembly, thereby improving the utilization rate of light.

[0041] It should be noted that the frame of the photovoltaic cell assembly provided by the exemplary embodiment of the utility model can be one of an aluminum or aluminum alloy frame, a steel frame and a composite material frame. The photovoltaic panel of the photovoltaic cell assembly provided by the exemplary embodiment of the utility model can be a laminate, which can include glass, film, battery sheet and back plate.

[0042] Figure 1 Schematic diagram of the frame structure according to the embodiment of the present utility model. Figure 1As shown, the frame for encapsulating the photovoltaic panel 40 provided by the exemplary embodiment of the utility model includes a first frame segment 10, a second frame segment 20 and a third frame segment 30 that enclose a accommodating space, the accommodating space is used to accommodate at least a portion of the edge of the photovoltaic panel 40; at least a portion of the first frame segment 10 is used to fit the light-receiving surface of the photovoltaic panel 40, and at least a portion of the third frame segment 30 is used to support the backlight surface of the photovoltaic panel 40; the first frame segment 10 has a second surface 12 and a first surface 11 facing away from the third frame segment 30, the first surface 11 is opposite to the second surface 12, and the first surface 11 has a curved reflective surface, and the reflective surface extends to the second surface 12 along a direction away from the second frame segment 20; the reflective surface has a rough surface 112 and a smooth surface 111 distributed along a direction away from the second frame segment 20.

[0043] In actual application, the accommodation space enclosed by the first frame segment 10, the second frame segment 20 and the third frame segment 30 is set on the corresponding edge of the photovoltaic panel 40, wherein the side of the photovoltaic panel 40 is opposite to the second frame segment 20, the edge of the light-receiving surface of the photovoltaic panel 40 abuts against the second surface 12 of the first frame segment 10, and the edge of the backlight surface of the photovoltaic panel 40 is supported on the third frame segment 30. Exemplarily, the second surface 12 can be a plane, or a surface composed of multiple planes or curved surfaces, depending on the groove that needs to be filled with glue between the second surface 12 and the light-receiving surface of the photovoltaic panel 40. The first surface 11 of the first frame segment 10, which is opposite to the second surface 12, is provided with a curved reflective surface. Specifically, the reflective surface extends to the second surface 12 in a direction away from the second frame segment 20, and the reflective surface is composed of a rough surface 112 and a smooth surface 111, and the smooth surface 111 is closer to the light-receiving surface of the photovoltaic panel 40. Compared with setting a smooth surface at the position of the rough surface 112 on the reflective surface, the rough surface 112 can change the reflection direction of sunlight, so that part of the sunlight originally reflected at this position is reflected into the photovoltaic cell assembly, thereby improving the utilization rate of light.

[0044] In some embodiments, in the frame provided by the exemplary embodiment of the utility model, the sum of the central angle corresponding to the rough surface 112 and the central angle corresponding to the smooth surface 111 is greater than or equal to 70° and less than or equal to 90°, that is, the central angle corresponding to the entire reflective surface is greater than or equal to 70° and less than or equal to 90°. Exemplarily, the sum of the central angle corresponding to the rough surface 112 and the central angle corresponding to the smooth surface 111 can be 75°, 77°, 80°, 83°, 85°, or 87°, etc.

[0045] Figure 2 Schematic diagram of the frame (with light path) structure according to the embodiment of the utility model. Figure 2As shown, the height direction of the second frame segment 20 is the distribution direction from the first frame segment 10 to the third frame segment 30, and the length direction of the first frame segment 10 is the distribution direction from the second frame segment 20 to the photovoltaic panel 40. When the height of the second frame segment 20 and the length of the first frame segment 10 are constant, the larger the central angle of the reflective surface, the flatter it is. The flatness here means that along the direction of the incident light, the smaller the slope of the reflective surface, conversely, the smaller the central angle of the reflective surface, the steeper it is. Based on this, when the sum of the central angle corresponding to the rough surface 112 and the central angle corresponding to the smooth surface 111 is greater than or equal to 70° and less than or equal to 90°, the light irradiated on the smooth surface 111 is reflected to the photovoltaic panel 40 in a more dispersed area. This is because when the height of the second frame segment 20 and the length of the first frame segment 10 are constant, the larger the central angle of the reflective surface, the flatter the reflective surface, that is, the smaller the slope of the reflective surface, which can avoid the problem of the small impact on the power of the photovoltaic cell module caused by the small central angle, so that more light can be reflected into the photovoltaic cell module, so that the reflection area of ​​the light is dispersed to various parts of the photovoltaic cell module instead of being concentrated in a single area of ​​the photovoltaic cell module. Based on this, when the central angle of the reflective surface is less than 70°, the light reflected to a single area of ​​the photovoltaic panel 40, for example, the light irradiated to the frame is mostly reflected only to the edge of the photovoltaic cell module and the battery string at the edge; by making the sum of the central angle corresponding to the rough surface 112 and the central angle corresponding to the smooth surface 111 greater than or equal to 70° and less than or equal to 90°, the light intensity of the photovoltaic panel 40 can be evenly increased, and the power can be increased more significantly. When the sum of the central angles of the rough surface 112 and the smooth surface 111 is greater than 90°, a portion of the reflective surface is completely separated from the light-receiving surface of the photovoltaic panel 40, so that the light on this portion of the surface completely deviates from the light-receiving surface.

[0046] When the sum of the central angles of the rough surface 112 and the smooth surface 111 is greater than or equal to 70° and less than or equal to 90°, when the midday sun is incident vertically, if a smooth surface is set at the position of the rough surface 112 of the reflective surface, most of the light will be reflected outside the photovoltaic cell assembly area, and the light utilization rate is low. Figure 2 As shown, a portion of the light irradiated on the rough surface 112 is reflected to the light receiving surface of the photovoltaic panel 40, thereby improving the utilization rate of the light and further increasing the power of the photovoltaic cell assembly.

[0047] There are many ways to form the rough surface 112 on the reflective surface. For example, an extrusion die can be used to form a wavy rough surface 112. The peaks and valleys of the rough surface 112 are distributed along the direction away from the second frame segment 20. This one-piece production method can use the existing extrusion process, and only the mold is modified and adjusted, which will not increase the process flow and transformation costs, and will not affect the reliability of the frame. The peaks distributed along the direction away from the second frame segment 20, that is, the length direction of the first frame segment 10, will reflect light to the light-receiving surface of the photovoltaic panel 40, thereby improving the light utilization rate.

[0048] Figure 3 Schematic diagram of the partial structure of the frame according to the embodiment of the present utility model. Figure 3 As shown, the rough surface 112 is a rough surface 112 formed by a plurality of continuous protrusions 112a, and the protrusions 112a are semicircular protrusions 112a. The same protrusion 112a has a surface close to the second frame segment 20 and a surface away from the second frame segment 20, wherein the surface away from the second frame segment 20 is used to reflect light to the light-receiving surface of the photovoltaic panel 40. By designing the protrusion 112a as a semicircle, even if dust accumulates on the frame, the position where dust is easily accumulated is mainly located on the side of the surface of the protrusion 112a close to the second frame segment 20, which will not affect the reflection of light on the side of the surface away from the second frame segment 20. Furthermore, designing the protrusion 112a as a semicircle can make more light reflected to the light-receiving surface of the photovoltaic panel 40 compared with other shapes.

[0049] In other embodiments, the rough surface 112 on the reflective surface may be formed by spraying to form a rough structure at the corresponding position, or by sandblasting to form a rough structure at the corresponding position. The rough structure formed above may diffusely reflect the incident light, and then reflect part of the light to the light-receiving surface of the photovoltaic panel 40, thereby improving the light utilization rate.

[0050] For example, the curvature radius of the rough surface 112 is the same as the curvature radius of the smooth surface 111, that is, the entire reflective surface is a continuous curved surface, which can facilitate the manufacture of the mold and reduce the production cost. When the entire reflective surface is a continuous curved surface, the transition between the rough surface 112 and the smooth surface 111 is relatively smooth, and it is not easy to block the light reflected by the rough surface 112.

[0051] In another embodiment, the curvature radius of the rough surface 112 may be greater than the curvature radius of the smooth surface 111. When the curvature radius of the rough surface 112 is larger, it forms a relatively steep curve state, so that the rough surface 112 can increase the light reflected to the light receiving surface of the photovoltaic panel 40, forming power gain. It should be noted that the curvature radius of the rough surface 112 is not easy to be too large. If it is too large, the power gain will be limited and the frame will be too high.

[0052] like Figure 3 As shown, the curvature radius of the rough surface 112 is equal to the curvature radius of the smooth surface 111, the smooth surface 111 has a first arc segment, and the rough surface 112 has a second arc segment corresponding to the first arc segment; the ratio of the arc length of the second arc segment to the arc length of the first arc segment is (0.89~1.11):1.

[0053] When the curvature radius of the rough surface 112 is equal to the curvature radius of the smooth surface 111, that is, the entire reflective surface is a curved surface with continuous curvature, the first arc segment of the smooth surface 111 is the arc segment formed when the first frame segment 10 is cross-sectioned in the longitudinal direction (the height direction of the second frame segment 20); and the second arc segment of the rough surface 112 is an arc segment continuous with the first arc segment, that is, an arc segment formed by the connecting line of the vertices of each semicircular protrusion 112a of the rough surface 112, such as Figure 3 The dotted line shown. The arc length of the first arc segment is L1, the arc length of the second arc segment is L2, L2:L1=(0.89-1.11):1, illustratively, L2:L1=(0.9-1.1):1, optionally, L2:L1=1:1, that is, the central angles corresponding to the smooth surface 111 and the rough surface 112 are the same.

[0054] In some embodiments, the first surface 11 of the first frame segment 10 in the frame provided by the exemplary embodiment of the utility model also has a planar straight surface 113, and the straight surface 113 and the reflective surface are distributed in a direction away from the second frame segment 20, and the reflective surface is a 1 / 4 circle arc surface.

[0055] like Figure 1As shown, when the reflective surface is a 1 / 4 circle arc surface, that is, the center angle corresponding to the reflective surface is 90°, the power gain of the photovoltaic panel 40 is obvious. Since for the photovoltaic cell assembly, the design of the frame needs to have certain size requirements according to the packaging requirements of the photovoltaic panel 40 to meet the reliability of the packaging, therefore, the height of the second frame segment 20 and the length of the first frame segment 10 are both fixed values, and when the reflective surface is a 1 / 4 circle arc surface, a flat surface 113 is required to transitionally connect the reflective surface and the second frame segment 20. Furthermore, since the central angle corresponding to the reflective surface is 90°, the central angles corresponding to the smooth surface 111 and the rough surface 112 are the same, that is, the central angles corresponding to the smooth surface 111 and the rough surface 112 are both set to 45°. At this time, since the light within the 45° range from the end closest to the second frame segment 20 to the farthest end of the rough surface 112, especially the incident light at noon, is mostly reflected outside the photovoltaic cell assembly area, the light utilization rate is low. Therefore, setting the rough surface 112 within the 45° range can maximize the utilization of the incident light, so that it can be reflected as much as possible to the light receiving surface of the photovoltaic panel 40, that is, the inside of the photovoltaic cell assembly area, thereby improving the light utilization rate and increasing the power of the photovoltaic cell assembly.

[0056] For example, when the height of the second frame segment 20 and the length of the first frame segment 10 are both constant, the sum of the arc length of the second arc segment and the arc length of the first arc segment is 8.9 mm to 9.6 mm. Figure 3 As shown, the total length of L1 and L2 is 8.9 mm to 9.6 mm. Exemplarily, L2 may be 4.45 mm to 4.8 mm.

[0057] In some embodiments, the rough surface 112 and the smooth surface 111 of the frame provided by the exemplary embodiment of the present utility model both have a reflective layer for improving reflectivity.

[0058] For example, the reflective surface, including the rough surface 112 and the smooth surface 111, can be treated by electrophoresis or other surface spraying processes to improve the reflectivity. For example, the reflectivity of a conventional aluminum alloy frame is 65-70%, and after the electrophoresis process, the reflectivity of the aluminum alloy frame can be increased by 5-10%, thereby further improving the frame's gain in photovoltaic cell module power.

[0059] Figure 4 is a schematic diagram of a photovoltaic cell assembly array structure according to an embodiment of the present utility model; Figure 4As shown, the frame has two first frames 51 and two second frames 52 arranged opposite to each other, and the two first frames 51 and the two second frames 52 are connected end to end to form a frame as a whole. Since the length extension direction of the first frame 51 and the second frame 52 is different, it is necessary to design the frame, for the same frame, on the one hand, based on the principle that the solar irradiance is the highest at noon and the power of the component is the highest, focus on the different changes in the incident angle in the morning and evening of the day to maximize the power gain; on the other hand, based on the latitude of the photovoltaic cell component and the inclination of the component installation, focus on the use of light throughout the year. Based on this, if the installation inclination angle matches the statistical analysis data of the radiation exposure, the rough surface 112 of the first frame 51 and the rough surface 112 of the second frame 52 have the same curvature radius, and the smooth surface 111 of the first frame 51 and the smooth surface 111 of the second frame 52 have the same curvature radius; if the installation inclination angle does not match the statistical analysis data of the radiation exposure, the rough surface 112 of the first frame 51 and the rough surface 112 of the second frame 52 have different curvature radii, and the smooth surface 111 of the first frame 51 and the smooth surface 111 of the second frame 52 have different curvature radii.

[0060] Exemplarily, the first frame 51 may be a long frame with a relatively long length in a photovoltaic cell assembly in a traditional sense, and correspondingly, the second frame 52 may be a short frame with a relatively short length.

[0061] In another optional implementation, the first frame 51 may be a short frame with a shorter length in a conventional photovoltaic cell assembly, and correspondingly, the second frame 52 may be a long frame with a longer length.

[0062] The exemplary embodiment of the present utility model further provides a photovoltaic cell assembly, comprising a photovoltaic panel 40 and the above-mentioned frame, wherein the photovoltaic panel 40 is encapsulated in the frame.

[0063] Compared with the prior art, the advantages of the photovoltaic cell assembly of the exemplary embodiment of the utility model are the same as the advantages of the frame, which will not be repeated here.

[0064] An exemplary embodiment of the utility model also provides a photovoltaic cell assembly array, comprising at least one of the above-mentioned photovoltaic cell assemblies, wherein the frame has two first frames 51 and two second frames 52 that are arranged opposite to each other, the first frame 51 is parallel to the ground, and the second frame 52 forms a preset angle with the ground; the curvature radius of the rough surface 112 of the first frame 51 is greater than or equal to the curvature radius of the rough surface 112 of the second frame 52; the curvature radius of the smooth surface 111 of the first frame 51 is greater than or equal to the curvature radius of the smooth surface 111 of the second frame 52.

[0065] Figure 5 FIG. 1 is a schematic diagram of a photovoltaic cell assembly array structure according to another embodiment of the present invention. Figure 4 and Figure 5 As shown, no matter which installation method the photovoltaic cell assembly adopts, the part parallel to the ground frame is called the first frame 51, and the part perpendicular to the first frame 51 is called the second frame 52. The design of the first frame 51 needs to focus on the use of light throughout the year, which is different from the second frame 52 which mainly considers the change of incident angle in the morning and evening of a day.

[0066] Since the installation inclination angle of the photovoltaic cell assembly needs to comprehensively consider the annual radiation statistics, including local hydrology, latitude and other factors. Based on this, when the installation inclination angle of the photovoltaic cell assembly matches the annual radiation statistical analysis data, the curvature radius of the rough surface 112 of the first frame 51 of the frame is equal to the curvature radius of the rough surface 112 of the second frame 52, and the curvature radius of the smooth surface 111 of the first frame 51 is equal to the curvature radius of the smooth surface 111 of the second frame 52.

[0067] When the installation inclination angle of the photovoltaic cell assembly does not match the statistical analysis data of the annual radiation, for example, when the photovoltaic cell assembly has a minimum installation angle of 3° to 5° near the equator, it is necessary to design the reflective surfaces of the first frame 51 and the second frame 52 differently. For example, the curvature radius of the rough surface 112 of the first frame 51 of the frame is greater than the curvature radius of the rough surface 112 of the second frame 52, and the curvature radius of the smooth surface 111 of the first frame 51 is greater than the curvature radius of the smooth surface 111 of the second frame 52, so as to fully utilize the light irradiated on the frame as much as possible and improve the power gain of the photovoltaic cell assembly.

[0068] In summary, the frame of the photovoltaic cell assembly provided by the exemplary embodiment of the utility model is based on optical simulation. Considering the different incident conditions of sunlight throughout the day, the central angle corresponding to the reflective surface is increased to more than 70° and less than or equal to 90°, so that the reflection area of ​​the light is dispersed to various parts of the photovoltaic panel rather than concentrated in a single area of ​​the photovoltaic panel. Compared with concentrating on increasing the light intensity of a single area of ​​the photovoltaic cell assembly, relatively uniformly increasing the light intensity of the photovoltaic cell assembly has a more significant effect on the power improvement of the assembly. At the same time, the use of a continuous convex surface can enhance the reflection effect of the position originally designed as a smooth arc, so that the light at this position is reflected to the light-receiving surface of the photovoltaic panel, thereby improving the light utilization rate. Furthermore, by setting the curvature radius of the reflective surface of the first frame and the second frame of the frame to be different, better power gain can be obtained.

[0069] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A frame, characterized in that: For packaging of photovoltaic panels, the frame comprises a first frame segment, a second frame segment and a third frame segment which enclose an accommodation space, and the accommodation space is used to accommodate at least part of the edge of the photovoltaic panel; At least a portion of the first frame segment is used to fit the light-receiving surface of the photovoltaic panel, and at least a portion of the third frame segment is used to support the backlight surface of the photovoltaic panel; The first frame segment has a second surface and a first surface facing away from the third frame segment, the first surface is opposite to the second surface, the first surface has a curved reflective surface, and the reflective surface extends to the second surface in a direction away from the second frame segment; The reflective surface has a rough surface and a smooth surface distributed in a direction away from the second frame segment.

2. The frame according to claim 1, characterized in that: The sum of the central angle corresponding to the rough surface and the central angle corresponding to the smooth surface is greater than or equal to 70° and less than or equal to 90°.

3. The frame according to claim 1, characterized in that: The rough surface is a wavy rough surface, and each crest and trough of the rough surface is distributed in a direction away from the second frame segment; or, The rough surface is the surface of the diffuse reflection coating.

4. The frame according to claim 3, characterized in that: The rough surface is a rough surface formed by a plurality of continuous protrusions, and the protrusions are semicircular protrusions.

5. The frame according to claim 1, characterized in that: The curvature radius of the rough surface is greater than or equal to the curvature radius of the smooth surface.

6. The frame according to claim 5, characterized in that: The curvature radius of the rough surface is equal to the curvature radius of the smooth surface, the smooth surface has a first arc segment, and the rough surface has a second arc segment corresponding to the first arc segment; The ratio of the arc length of the second arc segment to the arc length of the first arc segment is (0.89-1.11):

1.

7. The frame according to claim 6, characterized in that: The first surface further has a planar straight surface, the straight surface and the reflective surface are distributed in a direction away from the second frame segment, and the reflective surface is a 1 / 4 circle arc surface; and / or, The sum of the arc length of the second arc segment and the arc length of the first arc segment is 8.9 mm to 9.6 mm.

8. The frame according to any one of claims 1 to 7, characterized in that: The rough surface and / or the smooth surface has a reflective layer for improving reflectivity; and / or, The frame includes two first frames arranged opposite to each other and two second frames arranged opposite to each other; The curvature radius of the rough surface of the first frame and the rough surface of the second frame are the same or different; and / or, The curvature radius of the smooth surface of the first frame and the curvature radius of the smooth surface of the second frame are the same or different.

9. A photovoltaic cell assembly, characterized in that: It comprises a photovoltaic panel and the frame according to any one of claims 1 to 8, wherein the photovoltaic panel is encapsulated in the frame.

10. A photovoltaic cell assembly array, characterized in that: The photovoltaic cell assembly comprises at least one photovoltaic cell assembly according to claim 9, wherein the frame comprises two first frames arranged opposite to each other and two second frames arranged opposite to each other, the first frame is parallel to the ground, and the second frame forms a preset angle with the ground; The curvature radius of the rough surface of the first frame is greater than or equal to the curvature radius of the rough surface of the second frame; and / or, A radius of curvature of the smooth surface of the first frame is greater than or equal to a radius of curvature of the smooth surface of the second frame.

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