Photovoltaic module

Abstract

The invention relates to a photovoltaic module which comprises a laminated part, the laminated part comprises a front panel, a back panel and a plurality of battery pieces, the plurality of battery pieces are located between the front panel and the back panel which are correspondingly arranged and are arranged in a matrix mode, a first gap is formed between every two adjacent battery pieces in the length direction of the back panel, and a second gap is formed between every two adjacent battery pieces in the width direction of the back panel. A second gap is formed between the adjacent battery pieces; the laminated piece further comprises at least one strip-shaped light guide film, each light guide film is independently arranged, the light guide film is used for reflecting light, and in the thickness direction of the laminated piece, the light guide film is arranged between the battery piece and the back panel, or the light guide film is arranged on the side, away from the battery piece, of the back panel, and the light guide film is at least arranged at one first gap or one second gap. According to the photovoltaic module, the light rays emitted from the gaps of the battery pieces are reflected through the light guide film, so that the battery pieces can receive more light rays, the power generation efficiency of the photovoltaic module is improved, and the photovoltaic module is lower in manufacturing cost, simpler and capable of being customized flexibly.

Description

Technical Field

[0001] The present application relates to the technical field of new energy, and in particular to a photovoltaic module. Background Art

[0002] At present, it is becoming increasingly difficult to improve the power generation efficiency of photovoltaic modules by improving the power generation efficiency of cells. Therefore, more and more existing technologies are focusing on indirectly improving the power generation efficiency of photovoltaic modules by improving the light transmittance and reflectivity through other packaging materials. The back glass of traditional photovoltaic modules is colorless, and the gaps in the cells cannot be blocked. Some light will be emitted from the gaps, resulting in a waste of light, which is not conducive to improving the utilization rate of light by cells and the power generation efficiency of photovoltaic modules.

[0003] Some photovoltaic modules add colored mesh films on the back glass to cover the gaps between the cells. The reflectivity of the colored mesh films is low, resulting in low secondary utilization of light after reflection. Moreover, the method of adding colored mesh films on the back glass is to print and sinter them during glass processing, so that the back glass and the mesh films are integrated. Not only is the production process cumbersome and increases the production and production costs of the back glass, but the printing of the mesh films will cause a significant decrease in the strength of the back glass. Summary of the invention

[0004] Based on this, it is necessary to provide a photovoltaic module that can improve power generation efficiency, reduce costs, and can be flexibly customized.

[0005] A photovoltaic module, comprising a laminate, wherein the laminate comprises a front panel, a back panel and a plurality of cells, wherein the front panel is arranged corresponding to the back panel, the plurality of cells are located between the front panel and the back panel and are arranged in a matrix, wherein a first gap is provided between adjacent cells in the length direction of the back panel, and a second gap is provided between adjacent cells in the width direction of the back panel;

[0006] The laminate further comprises at least one strip of light-guiding film, each light-guiding film is independently arranged, and the light-guiding film is used to reflect light. In the thickness direction of the laminate, the light-guiding film is arranged between the battery cell and the back panel, or the light-guiding film is arranged on a side of the back panel away from the battery cell.

[0007] The light guide film is disposed at least in one of the first gaps or one of the second gaps.

[0008] In one embodiment, four adjacent battery cells and two of the first gaps and two of the second gaps therebetween form a third gap.

[0009] The light guide film is disposed at the first gap, the second gap and the third gap.

[0010] The light guide film at the third gap has two layers.

[0011] In one of the embodiments, in the thickness direction of the laminate, at least a portion of the light guide film overlaps with edges of two adjacent battery cells.

[0012] In one embodiment, the width of the light guide film is 4 mm to 10 mm;

[0013] The overlap width between the edge of the light guide film and the adjacent battery cell is 1 mm to 5 mm.

[0014] In one embodiment, the light-guiding film includes at least one of a first film, a second film and a third film.

[0015] The first film comprises a colored adhesive layer, wherein the colored adhesive layer contains a masterbatch;

[0016] The second film comprises a colored coating layer, a base layer and a colored adhesive layer stacked in sequence, the colored adhesive layer is used to connect the back panel, the colored coating layer contains masterbatch, and the colored coating layer and the base layer are both used to reflect light;

[0017] The third film comprises two colored coating layers, a base layer and an adhesive layer, wherein one coating layer, the base layer, another coating layer and the adhesive layer are stacked in sequence; the adhesive layer is used to connect the back panel, and the coating layer and the base layer are both used to reflect light;

[0018] The light guide film at any one of the first gaps or the second gaps is the first film, the second film or the third film.

[0019] In one embodiment, the light guiding film includes at least two of the first film, the second film and the third film.

[0020] In one embodiment, the base layer is made of polyethylene terephthalate, polypropylene or nylon.

[0021] In one embodiment, the laminate further comprises a first adhesive film, the first adhesive film is disposed between the front panel and the battery sheet, and the first adhesive film is used to reflect the light reflected by the light guide film;

[0022] The front panel is float glass or patterned glass.

[0023] In one embodiment, the photovoltaic assembly further includes a frame, characterized in that the frame includes a base and a connecting portion provided on the upper side of the base, the base includes a supporting surface, the connecting portion includes a first surface and a second surface, the first surface and the second surface are both extended along the length direction and the height direction of the base, in the height direction of the base, the second surface is located between the first surface and the supporting surface, one of the first surface and the second surface is a vertical surface, and the other is an inclined surface that is cut obliquely upward from one side close to the supporting surface to the other side,

[0024] The supporting surface is used to be connected to an edge of a bottom surface of the laminate, and at least one of the first surface and the second surface is used to be connected to a side surface of the laminate to fix the laminate.

[0025] In one of the embodiments, a fourth gap is provided between the battery cell located at the edge of the back panel and the edge of the back panel, and the light guide film is also provided at the fourth gap.

[0026] Compared with the prior art, in the photovoltaic module provided by the present application, the strip-shaped light-guiding film is located at least at a first gap or a second gap. When the light passes through the first gap or the second gap to reach the light-guiding film, the light is reflected on the surface of the light-guiding film and returns to the surface of the front panel close to the battery cell, and is reflected again on the surface of the front panel close to the battery cell, and finally reaches the surface of the battery cell. In this way, the light-guiding film reflects the light emitted from the gap between the battery cells, so that the battery cell can receive more light, thereby improving the utilization rate of the light and further improving the power generation efficiency of the photovoltaic module. In addition, the strip-shaped light-guiding film can be located at any first gap or second gap, and the light-guiding film and the back panel do not need to be sintered into one in advance, which makes the production cost of the photovoltaic module lower and simpler, and can be flexibly customized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the structure of a photovoltaic module according to an embodiment of the present application;

[0029] Figure 2 for Figure 1 The local method diagram at A in the middle;

[0030] Figure 3 This is a schematic structural diagram of a laminate according to an embodiment of the present application;

[0031] Figure 4 This is a schematic structural diagram of a laminated member according to another embodiment of the present application;

[0032] Figure 5 A schematic structural diagram of a light guide film according to an embodiment of the present application;

[0033] Figure 6 This is a structural schematic diagram of a frame of a full-screen photovoltaic module in an embodiment of the present application;

[0034] Figure 7 for Figure 6 Schematic diagram of the assembly of the frame and the laminate;

[0035] Figure 8 This is a structural schematic diagram of a frame of a full-screen photovoltaic module in another embodiment of the present application;

[0036] Fig. 9 for Figure 8 Schematic diagram of the assembly of the frame and a laminate;

[0037] Fig.10 for Figure 8 Schematic diagram of the assembly of the frame with another laminate;

[0038] Fig.11 This is a schematic structural diagram of the frame of a full-screen photovoltaic module in other embodiments of the present application;

[0039] Fig.12 for Fig.11 Schematic diagram of the assembly of the frame and laminate.

[0040] Figure numerals: 10, frame; 110, base; 111, support surface; 120, connection portion; 121, first surface; 122, second surface; 123, third surface; 124, fourth surface; 125, chamfered surface; 20, laminate; 201, first gap; 202, second gap; 203, third gap; 204, fourth gap; 205, side surface; 206, bottom surface; 210, front panel; 220, battery cell; 230, back panel; 240, light guide film; 241, colored coating layer; 242, base layer; 243, adhesive layer; 250, first adhesive film; 260, second adhesive film. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0046] See also Figures 1 to 5The present application provides a photovoltaic module, which includes a laminate 20, and the laminate 20 includes a front panel 210, a back panel 230 and a plurality of cells 220. The front panel 210 and the back panel 230 are arranged correspondingly, and the plurality of cells 220 are located between the front panel 210 and the back panel 230, and are arranged in a matrix. In the length direction of the back panel 230, there is a first gap 201 between adjacent cells 220, and in the width direction of the back panel 230, there is a second gap 202 between adjacent cells 220.

[0047] It can be understood that the shape of the battery cell is rectangular, and multiple battery cells are arranged in a matrix between the front panel and the back panel. In the length direction of the back panel 230, the first gap 201 between adjacent battery cells 220 is rectangular, and in the width direction of the back panel 230, the second gap 202 between adjacent battery cells 220 is also rectangular. In this way, as many battery cells 220 as possible can be arranged on the back panel 230, thereby improving the power generation efficiency of the photovoltaic module.

[0048] The laminate 20 further includes at least one strip of light guide film 240. Each light guide film 240 is independently arranged. The light guide film 240 is used to reflect light. Figure 3 and Figure 4 As shown by the arrow in , in the thickness direction of the laminate 20, the light-guiding film 240 is disposed between the battery cell 220 and the back panel 230, or the light-guiding film 240 is disposed on the side of the back panel 230 away from the battery cell 220, and the light-guiding film 240 is at least located in a first gap 201 or a second gap 202.

[0049] It can be understood that the strip-shaped light-guiding film 240 is located at at least one of the first gaps 201 and the second gaps 202. When light passes through the first gap 201 or the second gap 202 and reaches the light-guiding film 240, the light is reflected on the surface of the light-guiding film 240 and returns to the surface of the front panel 210 close to the battery cell 220, and is reflected again on the surface of the front panel 210 close to the battery cell 220, and finally reaches the surface of the battery cell 220. In this way, the light-guiding film 240 reflects the light emitted from the gaps in the battery cell 220, so that the battery cell 220 can receive more light, thereby improving the utilization rate of the light and further improving the power generation efficiency of the photovoltaic module. In addition, the strip-shaped light-guiding film 240 can be located at any first gap 201 or second gap 202. Schematically, the light-guiding film 240 can be connected to the back panel 230 by bonding, so that the light-guiding film 240 and the back panel 230 do not need to be sintered into one in advance, thereby simplifying the production process of photovoltaic modules, saving the production cost of photovoltaic modules, and allowing flexible customization.

[0050] It should be explained that, in the present application, "each light guide film 240 is independently arranged" means that each light guide film 240 is independent, that is, before the light guide film 240 is arranged on the back panel 230, each light guide film 240 is an independent strip structure. Before the battery cell 220 is arranged on the back panel 230, the position of the first gap 201 or the second gap 202 can be pre-divided according to the position of the battery cell 220 on the back panel 230, and the light guide film 240 can be arranged only in the first gap 201, only in the second gap 202, or at the same time in the first gap 201 and the second gap 202. The following takes the example of only setting the light guide film 240 in the first gap 201 as an example, and each light guide film 240 only covers one of the first gaps 201, and the light guide films 240 arranged at different first gaps 201 are not connected and are independently arranged.

[0051] Further, in the width direction of the back panel 230, the number of rows in which the battery cells 220 are arranged is greater than or equal to two rows, and in the length direction of the back panel 230, the number of columns in which the battery cells 220 are arranged is greater than or equal to two columns, that is, at least two first gaps 201 can be arranged in one column, and for the multiple first gaps 201 in the column, multiple independent light guide films 240 can be respectively set at each first gap 201, or the same light guide film 240 can be used to simultaneously set at the multiple first gaps 201 in the column, so that the operation of setting the light guide film 240 at the first gap 201 is relatively simple. Similarly, when the number of columns of the first gaps 201 is greater than or equal to two columns, the same light guide film 240 can be used to set at the first gaps 201 in the same column, that is, the light guide films 240 between the first gaps 201 in different columns are independently set.

[0052] It is understandable that the number and length of the light-guiding films 240 can be set as needed. Specifically, the area of ​​the light-guiding films 240 required can be calculated based on the reflectivity that the photovoltaic module needs to achieve, and then the number and length of the light-guiding films 240 can be set according to the area.

[0053] The light guide films 240 provided in the present application are each independently arranged, and thus the light guide films 240 can be arranged at any first gap 201 or second gap 202 that needs to be shielded, so that the arrangement position and arrangement ratio of the light guide films 240 on the back panel 230 can be flexibly customized.

[0054] Furthermore, the side of the light guide film 240 connected to the back panel 230 is sticky, so that the light guide film 240 can be set on the back panel 230 in a pasting manner. Schematically, the adhesive layer on the light guide film 240 provides the adhesiveness. The light guide film 240 is pasted on the back panel 230 in the following manner: the position of the first gap 201 or the second gap 202 is determined in advance according to the position of the battery cell 220, the light guide film 240 is heated by a hot air gun or other equipment, so that the adhesive layer on the light guide film 240 is melted by the heat, and then the light guide film 240 is rolled by a roller or other device, so that the light guide film 240 is pasted on the first gap 201 or the second gap 202 on the back panel 230.

[0055] Schematically, the light-guiding film 240 can be set only in all the first gaps 201, or can be set only in all the second gaps 202. Since all the first gaps 201 or all the second gaps 202 have the same shape on the back panel 230, that is, when the light-guiding film 240 is set only in the first gaps 201 or the second gaps 202 on the back panel 230, the direction of the light-guiding film 240 is the same, and there is no need to change the direction of operation when setting the first gaps 201 or the second gaps 202. In this way, the process of setting the light-guiding film 240 on the back panel 230 can be simplified, thereby improving production efficiency and reducing production costs.

[0056] In one embodiment, see Figure 2 , four adjacent cells 220 and the two first gaps 201 and two second gaps 202 therebetween enclose a third gap 203, and light guide films 240 are provided at the first gaps 201, the second gaps 202 and the third gaps 203. In this way, the total area where the light guide film 240 can be provided on the back panel 230 is increased, which is equivalent to increasing the total area that can reflect light, so that the light guide film 240 can reflect more light back to the cell 220, thereby improving the power generation efficiency of the photovoltaic module.

[0057] Furthermore, the light guide film 240 at the third gap 203 is two layers. It can be understood that since the third gap 203 is located between the two first gaps 201 and the two second gaps 202, that is, the third gap 203 is located at the intersection of each column of the first gap 201 and each row of the second gap 202. One light guide film 240 is used to be set at the first gap 201 located in a column, and one light guide film 240 is used to be set at the second gap 202 located in a row. When the light guide film 240 is set on all the first gaps 201 and the second gaps 202, the light guide film 240 at the third gap 203 is two layers. In this way, the process of setting the light guide film 240 on the back panel 230 can be simplified, thereby improving production efficiency and reducing production costs.

[0058] In one embodiment, see Figure 3 and Figure 4 In the thickness direction of the laminate 20, at least part of the light guide film 240 overlaps with the edges of two adjacent cells 220. In this way, the light guide film 240 can completely block the first gap 201 or the second gap 202 between the two adjacent cells 220, preventing the light entering the first gap 201 or the second gap 202 from being reflected to the cell 220 by the light guide film 240, thereby improving the utilization rate of light and the power generation efficiency of the photovoltaic module.

[0059] In one embodiment, the width of the light guide film 240 is 4 mm to 10 mm. It is understandable that the width of the first gap 201 or the second gap 202 between two adjacent battery cells 220 is 1 mm to 1.5 mm, so that the width of the light guide film 240 can completely block the first gap 201 or the second gap 202 between two adjacent battery cells 220, thereby improving the reflectivity of light. Schematically, the width of the light guide film 240 can also be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or a range consisting of any two of these values. This application is not limited to this.

[0060] Furthermore, the edge overlap width of the light guide film 240 and the adjacent battery cell 220 is 1 mm to 5 mm. In this way, the light guide film 240 can further block the first gap 201 or the second gap 202 between two adjacent battery cells 220, thereby improving the reflectivity of light. Schematically, the edge overlap width of the light guide film 240 and the adjacent battery cell 220 can also be 2 mm, 3 mm, 4 mm, or a range consisting of any two of these values. This application is not limited to this.

[0061] In one embodiment, the light-guiding film 240 is a first film, and the first film includes a colored adhesive layer, and the colored adhesive layer contains a masterbatch. The colored adhesive layer has different colors, such as white, silver, etc. By changing the type of masterbatch contained in the colored adhesive layer, a colored adhesive layer of different colors can be obtained, so that the color of the light-guiding film 240 and the reflectivity of light can be adjusted. Schematically, the main material of the colored adhesive layer is EVA, and a colored adhesive layer with color can be obtained by adding masterbatch to EVA, so that the colored adhesive layer has both the advantage of color and the function of sticking to glass, thus greatly reducing the cost of the light-guiding film 240. In other embodiments, the main material of the colored adhesive layer can also be a sticky material such as POE, EPE, etc., and the present application does not limit this.

[0062] In one embodiment, the light-guiding film 240 is a second film, which includes a colored coating layer, a base layer and a colored adhesive layer stacked in sequence. The colored adhesive layer is used to connect the back panel 230. The colored coating layer contains masterbatch. The colored coating layer and the base layer are both used to reflect light.

[0063] In this embodiment, the colored coating layer is a coating layer with different colors. By changing the type of masterbatch in the colored coating layer, the colored coating layer presents different colors, such as white, silver, green, yellow, etc. The color of the colored coating layer is selected according to the use environment, so that the aesthetics of the photovoltaic module can be improved. Schematically, the colored coating layer is silver or white, so that the reflective ability of the light guide film 240 can be enhanced, thereby improving the reflectivity of the light guide film to light. In addition, the colored coating layer can also resist ultraviolet rays and prevent the base layer from aging due to ultraviolet rays.

[0064] In this embodiment, the base layer is white or a color close to white, such as milky white, ivory, or other colors close to white, so that the light reflection efficiency is the highest, so that the base layer can reflect as much light as possible to the battery cell 220, thereby increasing the amount of light received by the battery cell 220 for the second time, thereby improving the power generation efficiency of the photovoltaic module. Furthermore, the material of the base layer is polyethylene terephthalate, polypropylene, or nylon, so that the mechanical strength of the base layer can be increased, thereby increasing the mechanical strength of the light guide film 240.

[0065] In one embodiment, see Figure 5 The light-guiding film 240 is a third film, which includes two colored coating layers 241, a base layer 242 and an adhesive layer 243, wherein one colored coating layer 241, a base layer 242, another colored coating layer 241 and an adhesive layer 243 are stacked in sequence; the adhesive layer 243 is used to connect the back panel 230, and the two colored coating layers 241 and the base layer 242 are both used to reflect light.

[0066] It is understandable that, for the two colored coating layers, the colors of the two layers can be the same or different, and the present application does not limit this. Schematically, the main material of the adhesive layer 243 is EVA, which is used to stick the third film on the back panel 230. In this way, the light guide film 240 can be set on the back panel 230 in a pasting manner. Compared with the method of sintering the light guide film 240 on the back panel 230, this embodiment is simple to operate and does not affect the rigidity of the back panel 230. In other embodiments, the main material of the adhesive layer 243 can also be a sticky material such as POE, EPE, etc., and the present application does not limit this.

[0067] Furthermore, the two colored coating layers have the same color, so that the color contrast of the light guide film 240 is stronger and can meet the color requirements of the environment.

[0068] In one embodiment, the light guide film 240 includes at least one of a first film, a second film, and a third film, and the light guide film 240 at any one of the first gaps 201 or the second gaps 202 is the first film, the second film, or the third film. In this way, the type and location of the light guide film 240 can be customized to meet the needs of different users.

[0069] In one embodiment, the light guide film 240 includes at least two of the first film, the second film, and the third film. As can be seen from the above, the number of layers of the first film, the second film, and the third film is different, and their reflectivity to light and their costs are also different. On the basis that the light guide film 240 can meet the preset reflectivity, part of the expensive light guide film 240 can be replaced with a relatively cheap light guide film 240. By combining at least two of the first film, the second film, and the third film, the use cost of the light guide film 240 can be saved.

[0070] In one embodiment, the laminate 20 further includes a first adhesive film 250, which is disposed between the front panel 210 and the battery cell 220, and is used to reflect the light reflected by the light guide film 240. In this way, it can be ensured that the light reflected by the light guide film 240 can be reflected to the battery cell 220 for a second time.

[0071] In one embodiment, the front panel 210 is float glass or embossed glass. Float glass or embossed glass has a smoother surface, more uniform thickness, and higher transparency, which can improve the light transmittance of the front panel 210, making it easier for the cells 220 to receive light, thereby improving the power generation efficiency of the photovoltaic module.

[0072] In one embodiment, the back panel 230 is float glass or patterned glass. Float glass or patterned glass has good toughness and strength, so it can prevent the photovoltaic module from being damaged or broken, prolong the service life of the photovoltaic module, and thus reduce the use cost of the photovoltaic module.

[0073] In one embodiment, the laminate 20 further includes a second adhesive film 260, which is disposed between the back panel 230 and the battery cell 220. The second adhesive film 260 is adhesive and can ensure that the relative position between the battery cell 220 and the back panel 230 is stable. When the light guide film 240 is also disposed between the battery cell 220 and the back panel 230, the light guide film 240 is disposed between the second adhesive film 260 and the back panel 230. In this way, the light guide film 240 can be protected, the light guide film 240 can be prevented from aging, and the service life of the light guide film 240 can be extended, thereby saving costs.

[0074] See also Figures 6 to 11In one embodiment, the photovoltaic module also includes a frame 10, which includes a base 110 and a connecting portion 120 arranged on the upper side of the base 110, the base 110 includes a supporting surface 111, and the connecting portion 120 includes a first surface 121 and a second surface 122, the first surface 121 and the second surface 122 are both extended along the length direction and the height direction of the base 110, in the height direction of the base 110, the second surface 122 is located between the first surface 121 and the supporting surface 111, one of the first surface 121 and the second surface 122 is a vertical surface, and the other is an inclined surface that is cut upward from one side close to the supporting surface 111 to the other side, the supporting surface 111 is used to connect with the edge of the bottom surface 206 of the laminate 20, and at least one of the first surface 121 and the second surface 122 is used to connect with the side surface 205 of the laminate 20 to fix the laminate 20.

[0075] It is understandable that the frame 10 can fix the laminate 20 by only connecting the bottom surface 206 and the side surface 205 of the laminate 20, that is, the frame 10 does not contact the front surface (also called the top surface) of the laminate 20. When the frame 10 and the laminate 20 are assembled into a photovoltaic module, the front surface of the laminate 20 is not blocked by the frame 10, which increases the lighting area of ​​the laminate 20, thereby improving the power generation efficiency.

[0076] Secondly, since the A surface of the frame in the prior art (the A surface is the part of the frame that blocks the front face of the laminate) is higher than the laminate, a groove is formed between the front edge of the laminate and the top of the frame. When it rains or snows, the groove is not conducive to drainage, and rainwater will accumulate on the surface of the photovoltaic module, causing the water to penetrate into the laminate, causing corrosion to the photovoltaic module, and the groove will also accumulate dust; while the frame 10 in the present application can only fix the laminate 20 through the bottom surface 206 and the side surface 205 of the laminate 20, so the frame 10 will not be higher than the laminate 20, and the front face of the laminate 20 will not accumulate rainwater and dust, thereby not affecting the lighting of the laminate 20, and thus can improve the power generation efficiency.

[0077] It should be noted that the laminate 20 includes a front panel 210, a battery cell 220 and a back panel 230 connected in sequence. The frame 10 in the present application can fix a rectangular laminate 20 (i.e., the sides of the front panel 210 and the back panel 230 are vertical planes, and the sides of the front panel 210 and the back panel 230 are on the same plane. The battery cell 220 is located between the front panel 210 and the back panel 230, and the side of the battery cell 220 does not protrude from the plane). By fixing an irregular laminate 20 (including the following types: a laminate 20 in which the side of the front panel 210 and the side of the back panel 230 are both vertical surfaces and are not on the same plane; a laminate 20 in which the side of the front panel 210 and the side of the back panel 230 are both inclined surfaces; a laminate 20 in which one of the side of the front panel 210 and the side of the back panel 230 is an inclined surface and the other is a vertical surface), the applicability of the frame 10 can be improved, and the present application does not impose any restrictions on this.

[0078] In one embodiment, Figure 6 As shown, the first surface 121 of the frame 10 in this embodiment is an inclined surface, and the second surface 122 is a vertical surface. Figure 7 The supporting surface 111 is connected to the edge of the bottom surface 206 of the laminate 20 , and the inclined first surface 121 is connected to the side surface of the front panel 210 of the laminate 20 , so as to increase the contact area of ​​the frame 10 with the laminate 20 .

[0079] In one embodiment, Figure 8 As shown, the first surface 121 of the frame 10 in this embodiment is a vertical surface, and the second surface 122 is an inclined surface. In this way, the universality of the frame 10 can be improved. For example, referring to Fig. 9 , the support surface 111 is connected to the edge of the bottom surface 206 of the laminate 20, and the inclined second surface 122 is connected to the side of the back panel 230 of the laminate 20. In other embodiments, the inclined second surface 122 is connected to the side of the front panel 210 and the side of the back panel 230 of the laminate 20 at the same time, so as to further increase the contact area of ​​the frame 10 with the laminate 20. In another embodiment, refer to Fig.10 The inclined second surface 122 is connected to the side of the back panel 230 of the laminate 20, and the vertical first surface 121 is used to support the bottom surface 206 of the front panel 210 of the laminate 20, so as to increase the contact area of ​​the frame 10 with the laminate 20, so that the frame 10 can better support the laminate 20.

[0080] In one embodiment, Fig.11As shown, the first surface 121 is an inclined surface, and the second surface 122 is a vertical surface. The connecting portion 120 also includes a third surface 123, which is extended along the length direction and the height direction of the base 110. The first surface 121, the second surface 122, the third surface 123 and the supporting surface 111 are connected in sequence, and the third surface 123 is inclined upward from the side connected to the supporting surface 111 to the side connected to the second surface 122; at least one of the first surface 121, the second surface 122, and the third surface 123 is used to connect with the side 205 of the laminate 20. In this way, the laminate 20 has universal applicability, reduces the molds for making the frame 10, and thus saves the manufacturing cost of the frame 10.

[0081] Further, refer to Fig.12 , the first surface 121 and the third surface 123 are both used to connect with the side surface 205 of the laminate 20. It should be noted that the first surface 121 is connected to the side surface of the front panel 210 of the laminate 20, and the third surface 123 is connected to the side surface of the back panel 230 of the laminate 20. In this way, the support area of ​​the frame 10 on the bottom surface 206 and the side surface 205 of the laminate 20 can be increased, so that the connection between the frame 10 and the laminate 20 is more stable; and the first surface 121 and the third surface 123 are both inclined surfaces, and the second surface 122 located between the two is a vertical surface, so that the connection part 120 is an inclined step shape. When the laminate 20 adapted to the frame 10 is connected to the frame 10, the laminate 20 and the frame 10 are embedded. The laminate 20 is not easy to move in the frame 10, thereby improving the stability of the photovoltaic module.

[0082] In one embodiment, the angle between the first surface 121 and the plane where the support surface 111 is located is α, 20°≤α≤70°. Fig.11 As shown, an obtuse angle complementary to α is formed between the first surface 121 and the plane where the support surface 111 is located, and the laminate 20 is arranged at the obtuse angle formed by the first surface 121 and the plane where the support surface 111 is located; and in order to connect the laminate 20 more closely with the frame 10, the side surface 205 of the laminate 20 can be set as an inclined surface adapted to the first surface 121. When the first surface 121 is connected with the laminate 20 with the adapted inclined surface, the inclined surface of the first surface 121 and the laminate 20 can play a certain role in blocking water flow, and the first surface 121 cooperates with the inclined surface of the laminate 20, so that the laminate 20 is embedded and assembled in the frame 10, so that the laminate 20 is not easy to move left and right, thereby improving the stability of the photovoltaic module. Schematically, α can be 30°, 40°, 50°, 60°, or any other value within the range of 20°≤α≤70°.

[0083] In one embodiment, the angle between the third surface 123 and the plane where the support surface 111 is located is defined as β, 20°≤β≤70°. Fig.11 As shown, an obtuse angle complementary to β is formed between the third surface 123 and the support surface 111, and the laminate 20 is arranged at the obtuse angle formed by the third surface 123 and the support surface 111; and in order to connect the laminate 20 more closely with the frame 10, the side surface 205 of the laminate 20 can be set as an inclined surface adapted to the third surface 123. When the third surface 123 is connected to the laminate 20 with the adapted inclined surface, the first surface 121 cooperates with the inclined surface of the laminate 20, so that the laminate 20 is embedded and assembled in the frame 10, so that the laminate 20 is not easy to move left and right, thereby improving the stability of the photovoltaic module. Schematically, β can be 30°, 40°, 50°, 60°, or any other value within the range of 20°≤β≤70°.

[0084] It is understandable that the angle values ​​of α and β may be the same or different, and the present application is not limited to this.

[0085] In one embodiment, α=β. The first surface 121 and the third surface 123 have the same inclination angle, so that the frame 10 is more beautiful. When the side surface 205 of the laminate 20 is provided with two inclined surfaces matching the first surface 121 and the third surface 123, the first surface 121 and the third surface 123 have the same inclination angle, so that the laminate 20 is easier to manufacture and more beautiful.

[0086] In one embodiment, the connecting portion 120 is provided with a fourth surface 124 on a side away from the laminate 20, and the connecting portion 120 is also provided with a chamfered surface 125, and the two ends of the chamfered surface 125 are respectively connected to the fourth surface 124 and the side of the first surface 121 away from the second surface 122. It can be understood that the chamfered surface 125 is rounded and has an arc. When it rains or snows and causes water flow on the surface of the laminate 20, the arc chamfered surface 125 has the effect of diverting the water flow in the direction away from the laminate 20, so that the residence time of the water flow on the laminate 20 can be reduced, and the water flow is prevented from penetrating into the interior of the laminate 20, thereby reducing the probability of water flow corroding the laminate 20. In addition, during the construction process such as the handling process of the frame 10, the assembly process of the laminate 20 and the frame 10, and the installation process of the photovoltaic module, the chamfered surface 125 can prevent the arms of the staff from being cut in the above-mentioned construction processes, thereby improving the safety of use.

[0087] In one embodiment, part of the connecting portion 120 protrudes from the base 110 in the width direction of the base 110. In this way, while increasing the supporting area of ​​the laminate 20, the volume of the base 110 can be reduced, thus reducing the material used to make the base 110 and saving production costs.

[0088] Schematically, the base 110 is a frame with a cavity, so that the overall width of the frame 10 can be increased, the overall thickness of the frame 10 becomes larger, not thin, and the support strength of the frame 10 is increased, and it is not easy to deform. Angle brackets can also be added inside the cavity for direct connection between the long frame 10 and the short frame 10.

[0089] In one embodiment, the connecting portion 120 is integrally formed with the base 110. In this way, the manufacturing process of the frame 10 can be simplified, the production efficiency can be improved, and the production cost can be saved. Schematically, the frame 10 is formed by integral extrusion. Further, the material of the frame 10 is aluminum alloy. In other embodiments, other materials, such as polymers, can also be selected as long as they can meet certain rigidity requirements, and the present application does not limit this.

[0090] In one embodiment, the laminate 20 has a bottom surface 206 and a side surface 205, the edge of the bottom surface 206 of the laminate 20 is connected to the support surface 111, and the side surface 205 is connected to at least one of the first surface 121 and the second surface 122. The frame 10 only connects the bottom surface 206 and the side surface 205 of the laminate, and does not block the top surface (i.e., the front surface) of the laminate 20, thus increasing the light-collecting area of ​​the laminate 20, thereby improving the power generation efficiency of the photovoltaic module.

[0091] Secondly, since the frame 10 of the photovoltaic module in this embodiment does not have an A surface, no groove is formed between the front edge of the laminate 20 and the top of the frame 10. When it rains or snows, water can flow directly from the edge of the laminate 20 and will not accumulate on the surface of the laminate 20, thereby preventing water from penetrating into the interior of the laminate 20 and further preventing corrosion to the laminate 20. In this way, not only can the service life of the photovoltaic module be extended, but also dust will not accumulate on the front of the laminate 20, which will not affect the lighting of the laminate 20, thereby improving the power generation efficiency of the photovoltaic module.

[0092] In addition, the photovoltaic module in this embodiment does not have the A surface of the shielding laminate 20, and the front surface is all the front panel 210, so that the integration degree is higher and the aesthetics is also higher. Schematically, the front panel 210 is glass, so that the light transmittance is high and the lighting of the battery cell 220 is not affected, thereby improving the power generation efficiency of the photovoltaic module.

[0093] Illustratively, the laminate 20 and the frame 10 in this embodiment can be connected by using hot melt adhesive and room temperature vulcanizing adhesive, or by using silicone, and this application does not impose any limitation on this.

[0094] In one embodiment, the side surface 205 of the laminate 20 is connected to both the first surface 121 and the third surface 123. In this way, the support area of ​​the frame 10 on the bottom surface 206 and the side surface 205 of the laminate 20 can be increased, making the connection between the frame 10 and the laminate 20 more stable, thereby improving the stability of the photovoltaic module.

[0095] In one embodiment, the laminate 20 includes a front panel 210, a battery cell 220, and a back panel 230 connected in sequence, the side of the front panel 210 of the laminate 20 is an inclined surface adapted to the first surface 121 of the frame 10, and the side of the back panel 230 is an inclined surface adapted to the third surface 123 of the frame 10. In this way, the manufacture of the laminate 20 is simpler, thereby improving the production efficiency of the laminate 20.

[0096] In one embodiment, the surface of the front panel 210 facing the cell 220 is the same size as the surface of the back panel 230 facing the cell 220. In this way, the structure of the laminate 20 is more compact and more beautiful, and the frame 10 adapted to the laminate 20 is more beautiful, making the photovoltaic module composed of the laminate 20 and the frame 10 more beautiful.

[0097] In one embodiment, there is a fourth gap 204 between the cell 220 located at the edge of the back panel 230 and the edge of the back panel 230, and a light guide film 240 is also provided at the fourth gap 204, increasing the total area of ​​the light guide film 240. In this way, the light reflected by the light guide film 240 to the cell 220 is further increased. It can be understood that for the frame 10 without the A surface. The fourth gap 204 is the area between the battery cell 220 located at the edge of the back panel 230 and the edge of the back panel 230; for the frame 10 with an A surface, the fourth gap 204 can reduce the area between the battery cell 220 located at the edge of the back panel 230 and the frame 10. Because the frame 10 is opaque, adding a light-guiding film 240 in the opaque area of ​​the frame 10 will cause the light-guiding film 240 to be unable to receive light, resulting in a waste of the light-guiding film 240. Therefore, it is only necessary to add the light-guiding film 240 at the fourth gap 204 between the battery cell 220 located at the edge of the back panel 230 and the frame 10. In this way, the use area and cost of the light-guiding film 240 can be saved.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A photovoltaic module, comprising a laminate, wherein the laminate comprises a front panel, a back panel and a plurality of cells, wherein the front panel and the back panel are arranged correspondingly, the plurality of cells are located between the front panel and the back panel and are arranged in a matrix, wherein a first gap is provided between adjacent cells in the length direction of the back panel, and a second gap is provided between adjacent cells in the width direction of the back panel; It is characterized in that The laminate further comprises at least one strip of light-guiding film, each light-guiding film is independently arranged, and the light-guiding film is used to reflect light. In the thickness direction of the laminate, the light-guiding film is arranged between the battery cell and the back panel, or the light-guiding film is arranged on a side of the back panel away from the battery cell. The light guide film is disposed at least in one of the first gaps or one of the second gaps.

2. The photovoltaic module according to claim 1, characterized in that: Four adjacent battery cells and the two first gaps and two second gaps therebetween form a third gap. The light guide film is disposed at the first gap, the second gap and the third gap. The light guide film at the third gap has two layers.

3. The photovoltaic module according to claim 1, characterized in that: In the thickness direction of the laminate, at least a portion of the light guide film overlaps with edges of two adjacent battery cells.

4. The photovoltaic module according to claim 3, characterized in that: The width of the light guide film is 4 mm to 10 mm; The overlap width between the edge of the light guide film and the adjacent battery cell is 1 mm to 5 mm.

5. The photovoltaic module according to claim 1, characterized in that: The light guide film includes at least one of a first film, a second film and a third film, The first film comprises a colored adhesive layer, wherein the colored adhesive layer contains a masterbatch; The second film comprises a colored coating layer, a base layer and a colored adhesive layer stacked in sequence, the colored adhesive layer is used to connect the back panel, the colored coating layer contains masterbatch, and the colored coating layer and the base layer are both used to reflect light; The third film comprises two colored coating layers, a base layer and an adhesive layer, wherein one coating layer, the base layer, another coating layer and the adhesive layer are stacked in sequence; the adhesive layer is used to connect the back panel, and the coating layer and the base layer are both used to reflect light; The light guide film at any one of the first gaps or the second gaps is the first film, the second film or the third film.

6. The photovoltaic module according to claim 5, characterized in that: The light guiding film includes at least two of the first film, the second film, and the third film.

7. The photovoltaic module according to claim 5, characterized in that: The material of the base layer is polyethylene terephthalate, polypropylene or nylon.

8. The photovoltaic module according to claim 1, characterized in that: The laminate further comprises a first adhesive film, which is disposed between the front panel and the battery sheet, and is used to reflect the light reflected by the light guide film; The front panel is float glass or patterned glass.

9. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly further comprises a frame, characterized in that the frame comprises a base and a connecting portion arranged on the upper side of the base, the base comprises a supporting surface, the connecting portion comprises a first surface and a second surface, the first surface and the second surface are both extended along the length direction and the height direction of the base, in the height direction of the base, the second surface is located between the first surface and the supporting surface, one of the first surface and the second surface is a vertical surface, and the other is an inclined surface inclined upward from one side close to the supporting surface to the other side, The supporting surface is used to be connected to an edge of a bottom surface of the laminate, and at least one of the first surface and the second surface is used to be connected to a side surface of the laminate to fix the laminate.

10. The photovoltaic module according to claim 9, characterized in that: There is a fourth gap between the battery sheet located at the edge of the back panel and the edge of the back panel, and the light guide film is also provided at the fourth gap.

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