Photovoltaic module

Abstract

The utility model 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, in particular to a photovoltaic module. BACKGROUND

[0002] At present, it is more and more difficult to improve the power generation efficiency of the photovoltaic module by improving the power generation efficiency of the battery piece, so more and more existing technologies focus on improving the power generation efficiency of the photovoltaic module indirectly by improving the light transmittance and reflectivity of other packaging materials. The back glass of the traditional photovoltaic module is colorless, the gap of the battery piece cannot be blocked, and part of the light will be emitted from the gap, thereby causing the waste of light and being not conducive to improving the utilization rate of the light by the battery piece and the power generation efficiency of the photovoltaic module.

[0003] Some photovoltaic modules increase a colored grid film on the back glass to block the gap between the battery pieces, the reflectivity of the colored grid film is low, which leads to the low secondary utilization of the reflected light. Moreover, the colored grid film is printed and sintered during the glass processing, so that the back glass and the grid film are integrated, which not only makes the manufacturing process complicated and increases the production and manufacturing cost of the back glass, but also causes the strength of the back glass to decrease greatly due to the printing of the grid film. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a photovoltaic module which can improve the power generation efficiency, reduce the cost and be flexible.

[0005] A photovoltaic module comprises a laminated piece, the laminated piece comprises a front panel, a back panel and a plurality of battery pieces, the front panel is arranged correspondingly to the back panel, the plurality of battery pieces are located between the front panel and the back panel and arranged in a matrix, there is a first gap between adjacent battery pieces in the length direction of the back panel, and there is a second gap between adjacent battery pieces in the width direction of the back panel.

[0006] The laminated piece further comprises at least one strip-shaped light guide film, each light guide film is arranged independently, the light guide film is used for reflecting light, and the light guide film is arranged between the battery piece and the back panel in the thickness direction of the laminated piece, or the light guide film is arranged on the side of the back panel away from the battery piece.

[0007] The light guide film is arranged at least at one of the first gap or the second gap.

[0008] In one embodiment, four adjacent battery pieces and two first gaps and two second gaps therebetween enclose a third gap.

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

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

[0011] In one embodiment, at least part of the light guide film overlaps the edges of two adjacent battery pieces in the thickness direction of the laminate.

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

[0013] The light guide film overlaps the edges of the adjacent battery pieces by 1-5 mm.

[0014] In one embodiment, the light guide film comprises at least one of a first film, a second film and a third film,

[0015] The first film comprises a colored adhesive layer containing color masterbatch.

[0016] The second film comprises a colored coating layer, a base layer and a colored adhesive layer stacked in order, the colored adhesive layer being used to connect the back panel, the colored coating layer containing color masterbatch, and the colored coating layer and the base layer both being used to reflect light.

[0017] The third film comprises two colored coating layers, a base layer and an adhesive layer, one of the coating layers, the base layer, the other of the coating layers and the adhesive layer being stacked in order; the adhesive layer being used to connect the back panel, and the coating layer and the base layer both being used to reflect light.

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

[0019] In one embodiment, the light guide film comprises 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 arranged between the front panel and the battery pieces, the first adhesive film being used to reflect light reflected by the light guide film.

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

[0023] In one of the embodiments, the photovoltaic module 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 arranged along the length direction and the height direction of the base, the second surface is located between the first surface and the supporting surface in the height direction of the base, one of the first surface and the second surface is a vertical surface, and the other is an inclined surface which is arranged upwardly and obliquely from one side to the other side close to the supporting surface.

[0024] The supporting surface is used to connect with the edge of the bottom surface of the laminated piece, and at least one of the first surface and the second surface is used to connect with the side surface of the laminated piece to fix the laminated piece.

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

[0026] Compared with the prior art, in the photovoltaic module provided by the application, the strip-shaped light guide film is arranged at least at the first gap or the second gap, when the light passes through the first gap or the second gap to reach the light guide film, the light is reflected on the surface of the light guide film and returns to the surface of the front panel close to the cell, and the light is reflected again on the surface of the front panel close to the cell, and finally reaches the surface of the cell. In this way, the light guide film reflects the light emitted from the gap between the cells, so that more light can be received on the cell, the utilization rate of the light is improved, and the power generation efficiency of the photovoltaic module is improved. In addition, the strip-shaped light guide film can be arranged at any first gap or second gap, the light guide film does not need to be sintered in advance to be integrated with the back panel, so that the manufacturing cost of the photovoltaic module is lower and simpler, and the photovoltaic module can be customized flexibly. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 FIG. 1 is a structural schematic diagram of a photovoltaic module according to an embodiment of the application;

[0029] Figure 2 FIG. 2 is a partial method diagram of FIG. 1 at A; Figure 1

[0030] Figure 3 FIG. 3 is a structural schematic diagram of a laminated piece according to an embodiment of the application; ​

[0031] Figure 4 This is a schematic diagram of the structure of a laminate according to another embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of a light guide film according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the frame structure of a full-screen photovoltaic module in one embodiment of this application;

[0034] Figure 7 for Figure 6 A schematic diagram of the assembly of the frame and laminated components;

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

[0036] Figure 9 for Figure 8 An assembly diagram of the border and a laminate in the image;

[0037] Figure 10 for Figure 8 A schematic diagram showing the assembly of the frame and another laminate in the middle;

[0038] Figure 11 This is a schematic diagram of the frame structure of the full-screen photovoltaic module in other embodiments of this application;

[0039] Figure 12 for Figure 11 A schematic diagram of the assembly of the frame and the laminate.

[0040] Reference numerals: 10, frame; 110, base; 111, support surface; 120, connecting part; 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 Implementation

[0041] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the detailed description of the specific embodiments of the present application is made below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0042] It is noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions as used herein are for the purpose of illustration only and do not indicate the only orientation of the present application.

[0043] In addition, the terms "first", "second", etc. are used herein only to describe various elements, and do not imply or suggest relative importance or a number of the indicated technical features. Thus, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is directly in contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

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

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

[0047] It is understandable that the solar cells are rectangular in shape, and multiple solar 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 solar cells 220 is rectangular, and in the width direction of the back panel 230, the second gap 202 between adjacent solar cells 220 is also rectangular. In this way, as many solar 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 also includes at least one strip-shaped light guide film 240, each light guide film 240 being independently disposed. The light guide film 240 is used to reflect light, such as... Figure 3 and Figure 4 As indicated by the arrow, in the thickness direction of the laminate 20, the light guide film 240 is disposed between the battery cell 220 and the back panel 230, or the light guide film 240 is disposed on the side of the back panel 230 away from the battery cell 220, and the light guide film 240 is located at least at a first gap 201 or a second gap 202.

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

[0050] It needs to 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 piece 220 is arranged on the back panel 230, the positions of the first gaps 201 or the second gaps 202 can be divided in advance according to the positions of the battery pieces 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 in both the first gap 201 and the second gap 202. Hereinafter, the light guide film 240 is arranged only in the first gap 201, and each light guide film 240 covers only one first gap 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 of the battery pieces 220 arranged is greater than or equal to two, and in the length direction of the back panel 230, the number of columns of the battery pieces 220 arranged is greater than or equal to two, that is, at least two first gaps 201 can be arranged in a column, and for the plurality of first gaps 201 in the column, a plurality of independent light guide films 240 can be arranged at each first gap 201, or the same light guide film 240 can be arranged at the plurality of first gaps 201 in the column, so that the operation of arranging the light guide film 240 at the first gap 201 is simple. Similarly, when the number of columns of the first gaps 201 is greater than or equal to two, the same light guide film 240 can be arranged 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 arranged.

[0052] It can be understood that the number and length of the light guide film 240 can be set as needed, and specifically, the area of the light guide film 240 to be set can be calculated according to the reflectivity required by the photovoltaic module, and then the number and length of the light guide film can be set according to the area of the light guide film 240.

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

[0054] Further, the side of the light guide film 240 connected with the back panel 230 is adhesive, so that the light guide film 240 can be arranged on the back panel 230 in a pasting manner. Illustratively, the adhesive layer on the light guide film 240 provides the adhesion. The light guide film 240 is pasted on the back panel 230 in the following manner: the positions of the first gaps 201 or the second gaps 202 are determined in advance according to the positions of the battery pieces 220, the light guide film 240 is heated by a hot air gun or the like, 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 the like, so that the light guide film 240 is pasted on the back panel 230 at the first gaps 201 or the second gaps 202.

[0055] Illustratively, the light guide film 240 can be arranged only at all the first gaps 201 or only at all the second gaps 202. Since the shapes of all the first gaps 201 or all the second gaps 202 on the back panel 230 are the same, that is, when the light guide film 240 is arranged only at the first gaps 201 or the second gaps 202 on the back panel 230, the directions of the light guide film 240 are the same, and the direction of the operation does not need to be changed when the light guide film 240 is arranged at the first gaps 201 or the second gaps 202, so that the process of arranging the light guide film 240 on the back panel 230 can be simplified, thereby improving the production efficiency and reducing the production cost.

[0056] In one embodiment, referring to Figure 2 , four adjacent battery pieces 220 and the two first gaps 201 and the two second gaps 202 therebetween enclose a third gap 203, and the light guide film 240 is arranged at the first gaps 201, the second gaps 202, and the third gap 203. In this way, the total area on which the light guide film 240 can be arranged 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 battery pieces 220, thereby improving the power generation efficiency of the photovoltaic module.

[0057] Further, 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 first gaps 201 and each row of second gaps 202. When one light guide film 240 is arranged at the first gaps 201 in one column and one light guide film 240 is arranged at the second gaps 202 in one row, the light guide film 240 at the third gap 203 is two layers, so that the process of arranging the light guide film 240 on the back panel 230 can be simplified, thereby improving the production efficiency and reducing the production cost.

[0058] In one embodiment, referring toFigure 3 and Figure 4 In the thickness direction of the laminate 20, the light guide film 240 overlaps with the edges of the two adjacent battery pieces 220. In this way, the light guide film 240 can completely cover the first gap 201 or the second gap 202 between the two adjacent battery pieces 220, so that the light entering the first gap 201 or the second gap 202 cannot be reflected onto the battery pieces 220 through the light guide film 240, thereby improving the utilization of light and the power generation efficiency of the photovoltaic module.

[0059] In an embodiment, the width of the light guide film 240 is 4 mm to 10 mm. It can be understood that the width of the first gap 201 or the second gap 202 between the two adjacent battery pieces 220 is 1 mm to 1.5 mm, so that the width of the light guide film 240 can completely cover the first gap 201 or the second gap 202 between the two adjacent battery pieces 220, thereby improving the reflectivity of light. Illustratively, the width of the light guide film 240 can also be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or a range formed by any two of these values. The present application does not limit this.

[0060] Further, the light guide film 240 overlaps with the edges of the adjacent battery pieces 220 by a width of 1 mm to 5 mm. In this way, the light guide film 240 can further cover the first gap 201 or the second gap 202 between the two adjacent battery pieces 220, thereby improving the reflectivity of light. Illustratively, the width of the light guide film 240 overlapping with the edges of the adjacent battery pieces 220 can also be 2 mm, 3 mm, 4 mm, or a range formed by any two of these values. The present application does not limit this.

[0061] In an embodiment, the light guide film 240 is a first film, and the first film comprises a colored adhesive layer containing color master batches. The colored adhesive layer has different colors, such as white, silver, etc. By changing the types of color master batches contained in the colored adhesive layer, colored adhesive layers with different colors can be obtained, so that the color and reflectivity of light of the light guide film 240 can be adjusted. Illustratively, the main material of the colored adhesive layer is EVA, and the color master batch is added to the EVA to obtain the colored adhesive layer with color. The colored adhesive layer has the advantages of color and the function of pasting with glass, so that the cost of the light guide film 240 is greatly reduced. In other embodiments, the main material of the colored adhesive layer can also be a material with adhesion such as POE, EPE, etc. The present application does not limit this.

[0062] In one embodiment, the light guide film 240 is a second film, the second film comprising a colored coating layer, a base layer and a colored adhesive layer stacked in sequence, the colored adhesive layer being used to connect the back panel 230, the colored coating layer containing color master batches, and the colored coating layer and the base layer both being used to reflect light.

[0063] In the present embodiment, the colored coating layer is a coating layer with different colors, the color master batches in the colored coating layer being changed to make the colored coating layer present different colors, such as white, silver, green, yellow, etc., the color of the colored coating layer being selected according to the use environment, so that the appearance of the photovoltaic module can be improved. Illustratively, the colored coating layer is silver or white, so that the light reflection ability of the light guide film 240 can be enhanced, thereby improving the light reflection rate of the light guide film.

[0064] In the present embodiment, the base layer is white or a color close to white, such as ivory, etc., so that the reflection efficiency of light is the highest, the base layer can reflect as much light as possible to the cell sheet 220, the number of light received by the cell sheet 220 for the second time is increased, and thus the power generation efficiency of the photovoltaic module is improved. Further, the material of the base layer is polyethylene terephthalate, polypropylene or nylon, so that the mechanical strength of the base layer can be increased, and thus the mechanical strength of the light guide film 240 can be increased.

[0065] In one embodiment, referring to Figure 5 , the light guide film 240 is a third film, the third film comprising two colored coating layers 241, a base layer 242 and an adhesive layer 243, one of the two colored coating layers 241, the base layer 242, the other of the two colored coating layers 241 and the adhesive layer 243 being stacked in sequence; the adhesive layer 243 being used to connect the back panel 230, and the two colored coating layers 241 and the base layer 242 both being used to reflect light.

[0066] It can be understood that the colors of the two colored coating layers can be the same or different, and the present application does not limit this. Illustratively, the main material of the adhesive layer 243 is EVA, which is used to paste the third film on the back panel 230, so that the light guide film 240 can be arranged on the back panel 230 in a pasting manner, compared with the manner of sintering the light guide film 240 on the back panel 230, the present embodiment is simple in operation 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 POE, EPE, etc., which has viscosity, and the present application does not limit this.

[0067] Further, the colors of the two colored coating layers are the same, so that the color contrast of the light guide film 240 is stronger, and the color demand of the environment can be met.

[0068] In one embodiment, the light guide film 240 comprises at least one of the first film, the second film and the third film. The light guide film 240 at any one of the first gap 201 or the second gap 202 is the first film, the second film or the third film. In this way, the type and the setting position 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 comprises at least two of the first film, the second film and the third film. As known from the above, the number of layers of the first film, the second film and the third film is different, and the reflectivity of light and the cost thereof 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 by the relatively cheap light guide film 240, and by using 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 comprises a first adhesive film 250, which is arranged between the front panel 210 and the battery sheet 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 sheet 220 again.

[0071] In one embodiment, the front panel 210 is float glass or embossed glass. The surface of the float glass or embossed glass is smoother, the thickness is more uniform, and the transparency is higher. In this way, the light transmittance of the front panel 210 can be improved, so that the light is more easily received by the battery sheet 220, thereby improving the power generation efficiency of the photovoltaic module.

[0072] In one embodiment, the back panel 230 is float glass or embossed glass. The float glass or embossed glass has good toughness and strength, so that the photovoltaic module can be prevented from being damaged or broken, thereby prolonging the service life of the photovoltaic module and reducing the use cost of the photovoltaic module.

[0073] In one embodiment, the laminate 20 further comprises a second adhesive film 260, which is arranged between the back panel 230 and the battery sheet 220. The second adhesive film 260 has adhesion, so that the relative position between the battery sheet 220 and the back panel 230 is stable. When the light guide film 240 is also arranged between the battery sheet 220 and the back panel 230, the light guide film 240 is arranged between the second adhesive film 260 and the back panel 230. In this way, the light guide film 240 can be protected, the aging of the light guide film 240 can be prevented, the service life of the light guide film 240 can be prolonged, and the cost can be saved.

[0074] Please refer to Figures 6 to 11In one embodiment, the photovoltaic module further comprises a frame 10, the frame 10 comprising a base 110 and a connecting portion 120 arranged on the upper side of the base 110, the base 110 comprising a support surface 111, the connecting portion 120 comprising a first surface 121 and a second surface 122, the first surface 121 and the second surface 122 are arranged 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 support surface 111, one of the first surface 121 and the second surface 122 is a vertical surface, and the other is an inclined surface which is arranged obliquely upward from one side to the other side close to the support surface 111, the support surface 111 is used to connect with the edge of the bottom surface 206 of the laminated piece 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 laminated piece 20 to fix the laminated piece 20.

[0075] It can be understood that the frame 10 can fix the laminated piece 20 by connecting only the bottom surface 206 and the side surface 205 of the laminated piece 20, that is, the frame 10 does not contact the front surface (also referred to as the top surface) of the laminated piece 20. When the frame 10 and the laminated piece 20 are assembled into a photovoltaic module, the front surface of the laminated piece 20 is not blocked by the frame 10, which increases the light receiving area of the laminated piece 20 and improves the power generation efficiency.

[0076] Secondly, in the prior art, the A surface (the A surface is the surface of the frame which blocks the front surface of the laminated piece) of the frame is higher than the laminated piece, and a groove is formed between the edge of the front surface of the laminated piece 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 laminated piece and corrode the photovoltaic module, and the groove will also accumulate dust. The frame 10 in the present application can fix the laminated piece 20 only by the bottom surface 206 and the side surface 205 of the laminated piece 20, so the frame 10 will not be higher than the laminated piece 20, and the front surface of the laminated piece 20 will not accumulate rainwater and dust, so as not to affect the light receiving of the laminated piece 20, thereby improving the power generation efficiency.

[0077] It should be noted that the laminated piece 20 includes the front panel 210, the battery sheet 220 and the back panel 230 connected in sequence, and the frame 10 in the present application can fix the rectangular laminated piece 20 (i.e. the side surface of the front panel 210 and the side surface of the back panel 230 are vertical surfaces, and the side surface of the front panel 210 and the side surface of the back panel 230 are on the same plane, and the battery sheet 220 is located between the front panel 210 and the back panel 230, and the side surface of the battery sheet 220 does not protrude from the plane), or fix the irregular laminated piece 20 (including the following types: the side surface of the front panel 210 and the side surface of the back panel 230 are vertical surfaces, and are not on the same plane; the side surface of the front panel 210 and the side surface of the back panel 230 are inclined surfaces; one of the side surface of the front panel 210 and the side surface of the back panel 230 is an inclined surface, and the other is a vertical surface), so as to improve the applicability of the frame 10, which is not limited in the present application.

[0078] In one embodiment, as shown in FIG. 1, the first surface 121 of the frame 10 in the present embodiment is an inclined surface, and the second surface 122 is a vertical surface. Figure 6 In the present embodiment, referring to FIG. 1, the supporting surface 111 is connected with the edge of the bottom surface 206 of the laminated piece 20, and the inclined first surface 121 is connected with the side surface of the front panel 210 of the laminated piece 20, so as to increase the contact area of the frame 10 to the laminated piece 20. Figure 7

[0079] In one embodiment, as shown in FIG. 1, the first surface 121 of the frame 10 in the present embodiment is an inclined surface, and the second surface 122 is a vertical surface. Figure 8 In the present embodiment, referring to FIG. 1, the supporting surface 111 is connected with the edge of the bottom surface 206 of the laminated piece 20, and the inclined first surface 121 is connected with the side surface of the front panel 210 of the laminated piece 20, so as to increase the contact area of the frame 10 to the laminated piece 20. Figure 9 In the present embodiment, referring to FIG. 1, the supporting surface 111 is connected with the edge of the bottom surface 206 of the laminated piece 20, and the inclined first surface 121 is connected with the side surface of the front panel 210 of the laminated piece 20, so as to increase the contact area of the frame 10 to the laminated piece 20. Figure 10 In the present embodiment, referring to FIG. 1, the supporting surface 111 is connected with the edge of the bottom surface 206 of the laminated piece 20, and the inclined first surface 121 is connected with the side surface of the front panel 210 of the laminated piece 20, so as to increase the contact area of the frame 10 to the laminated piece 20.

[0080] In one embodiment, as shown in FIG. 1, the first surface 121 of the frame 10 in the present embodiment is an inclined surface, and the second surface 122 is a vertical surface. Figure 11 ​As shown, the first surface 121 is an inclined surface, and the second surface 122 is a vertical surface. The connecting portion 120 further comprises a third surface 123, which extends along the length direction and the height direction of the base 110, and the first surface 121, the second surface 122, the third surface 123 and the supporting surface 111 are sequentially connected, and the third surface 123 is arranged upwardly and obliquely from one side of the connecting supporting surface 111 to the side of the connecting 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 surface 205 of the laminated piece 20. In this way, the frame 10 has universality to the laminated piece 20, and the mold for manufacturing the frame 10 is reduced, thereby saving the manufacturing cost of the frame 10.

[0081] Further, referring to Figure 12 , the first surface 121 and the third surface 123 are both used to connect with the side surface 205 of the laminated piece 20. It should be noted that the first surface 121 is connected with the side surface of the front panel 210 of the laminated piece 20, and the third surface 123 is connected with the side surface of the back panel 230 of the laminated piece 20. In this way, the supporting area of the frame 10 to the bottom surface 206 and the side surface 205 of the laminated piece 20 can be increased, so that the connection between the frame 10 and the laminated piece 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 first surface 121 and the third surface 123 is a vertical surface, so that the connecting portion 120 is an inclined ladder shape, and when the laminated piece 20 adapted to the frame 10 is connected with the frame 10, the laminated piece 20 and the frame 10 are connected in an embedded manner, so that the laminated piece 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 supporting surface 111 is located is α, and 20°≤α≤70°. It can be understood that, as Figure 11 shown, an obtuse angle complementary to α is also formed between the first surface 121 and the plane where the supporting surface 111 is located, and the laminated piece 20 is arranged at the obtuse angle formed by the first surface 121 and the plane where the supporting surface 111 is located; and in order to be more closely connected with the frame 10, the side surface 205 of the laminated piece 20 can be arranged as an inclined surface adapted to the first surface 121. When the first surface 121 is connected with the laminated piece 20 having the adapted inclined surface, the inclined surface of the first surface 121 and the laminated piece 20 can play a certain role in blocking water flow, and the inclined surface of the first surface 121 and the laminated piece 20 cooperates to enable the laminated piece 20 to be embeddedly assembled in the frame 10, so that the laminated piece 20 is not easy to move left and right, thereby improving the stability of the photovoltaic module. Illustratively, 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 supporting surface 111 is located is β, and 20°≤β≤70°. It can be understood that, asFigure 11 As shown, an obtuse angle complementary to β is formed between the third face 123 and the support face 111, and the laminate 20 is arranged at the obtuse angle formed by the third face 123 and the support face 111. In order to be more closely connected with the frame 10, the side face 205 of the laminate 20 can be arranged as a bevel surface matching the third face 123. When the third face 123 is connected with the laminate 20 having the matching bevel surface, the first face 121 cooperates with the bevel surface of the laminate 20, so that the laminate 20 is embeddedly assembled in the frame 10, and the laminate 20 is less likely to move left and right, thereby improving the stability of the photovoltaic module. Illustratively, β can be 30°, 40°, 50°, 60°, or any other value within the range of 20°≤β≤70°.

[0084] It can be understood that the angle values of α and β can be the same or different, and the present application does not limit this.

[0085] In an embodiment, α=β. The inclination angles of the first face 121 and the third face 123 are the same, so that the frame 10 is more beautiful. When the side face 205 of the laminate 20 is arranged with two bevel surfaces matching the first face 121 and the third face 123 at the same time, the inclination angles of the first face 121 and the third face 123 are the same, so that the laminate 20 is simpler to manufacture and more beautiful.

[0086] In an embodiment, the fourth face 124 is arranged on the side of the connecting portion 120 away from the laminate 20, and the connecting portion 120 is further arranged with a chamfered face 125, and the two ends of the chamfered face 125 are respectively connected with the fourth face 124 and the side of the first face 121 away from the second face 122. It can be understood that the chamfered face 125 is round and has an arc. When rain or snow causes water flow on the surface of the laminate 20, the arc chamfered face 125 has the effect of guiding 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 can be prevented from penetrating into the laminate 20, thereby reducing the probability of water flow corroding the laminate 20. In addition, during the transportation 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 face 125 can prevent the arms of the workers from being cut during the above construction processes, thereby improving the safety of use.

[0087] In an embodiment, in the width direction of the base 110, part of the connecting portion 120 protrudes from the base 110. In this way, while increasing the support area of the laminate 20, the volume of the base 110 can be reduced, so that the manufacturing material of the base 110 is reduced, thereby saving the production cost.

[0088] Illustratively, the base 110 is a frame with a cavity, so that the overall width of the frame 10 can be increased, so that the overall thickness of the frame 10 is large, not thin, and the support strength of the frame 10 is increased, and deformation is not easy to occur. The cavity inside can also add an angle code for the direct connection of 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. Illustratively, the frame 10 is formed by one-piece 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 meet certain rigidity requirements, and the present application does not limit this.

[0090] In one embodiment, the laminated piece 20 has a bottom surface 206 and a side surface 205, the edge of the bottom surface 206 of the laminated piece 20 is connected with the support surface 111, and the side surface 205 is connected with 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 laminated surface, and does not block the top surface (i.e. the front surface) of the laminated piece 20, so as to increase the light receiving area of the laminated piece 20, thereby improving the power generation efficiency of the photovoltaic module.

[0091] Secondly, since the frame 10 of the photovoltaic module in the present embodiment does not have an A surface, a groove is not formed between the edge of the front surface of the laminated piece 20 and the top of the frame 10. When it rains or snows, water can flow directly from the edge of the laminated piece 20, and will not accumulate on the surface of the laminated piece 20, avoiding water penetration into the laminated piece 20, thereby avoiding corrosion of the laminated piece 20. In this way, not only can the service life of the photovoltaic module be prolonged, but also the front surface of the laminated piece 20 will not accumulate dust, which will not affect the light receiving of the laminated piece 20, thereby improving the power generation efficiency of the photovoltaic module.

[0092] In addition, the photovoltaic module in the present embodiment does not have an A surface that blocks the laminated piece 20, and the front surface is entirely the front panel 210, so that the degree of integration is higher and the aesthetic degree is higher. Illustratively, the front panel 210 is glass, so that the light transmittance is high and does not affect the light receiving of the cell sheet 220, thereby improving the power generation efficiency of the photovoltaic module.

[0093] Illustratively, the laminated piece 20 and the frame 10 in the present embodiment can be connected by using hot melt glue and room temperature vulcanized glue, or can be connected by using silicone, and the present application does not limit this.

[0094] In one embodiment, the side surface 205 of the laminated piece 20 is connected with the first surface 121 and the third surface 123 simultaneously. In this way, the supporting area of the frame 10 to the bottom surface 206 and the side surface 205 of the laminated piece 20 can be increased, so that the connection between the frame 10 and the laminated piece 20 is more stable, thereby improving the stability of the photovoltaic module.

[0095] In one embodiment, the laminated piece 20 comprises a front panel 210, a cell piece 220 and a back panel 230 connected in sequence, the side surface of the front panel 210 of the laminated piece 20 is a bevel surface adapted to the first surface 121 of the frame 10, and the side surface of the back panel 230 is a bevel surface adapted to the third surface 123 of the frame 10. In this way, the laminated piece 20 is easier to manufacture, thereby improving the production efficiency of the laminated piece 20.

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

[0097] In one embodiment, the cell piece 220 at the edge of the back panel 230 has a fourth gap 204 between the edge of the back panel 230, and the fourth gap 204 is also provided with a light guide film 240, thereby increasing the total area of the light guide film 240. In this way, the light reflected to the cell piece 220 by the light guide film 240 is further increased. It can be understood that for the frame 10 without an A surface, the fourth gap 204 is the area between the cell piece 220 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 be reduced to the area between the cell piece 220 at the edge of the back panel 230 and the frame 10, because the frame 10 is opaque, adding the light guide film 240 in the area of the opaque frame 10 cannot receive light, which will cause the waste of the light guide film 240, therefore, only the fourth gap 204 between the cell piece 220 at the edge of the back panel 230 and the frame 10 needs to be increased with the light guide film 240, in this way, the use area and cost of the light guide film 240 can be saved.

[0098] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0099] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. A photovoltaic module, comprising a laminate, the laminate comprising a front panel, a back panel and a plurality of cell pieces, the front panel and the back panel being correspondingly arranged, and the plurality of cell pieces being arranged between the front panel and the back panel and in a matrix, and in a length direction of the back panel, a first gap being between adjacent cell pieces, and in a width direction of the back panel, a second gap being between adjacent cell pieces; the laminate further comprising at least one strip-shaped light guide film, each light guide film being independently arranged, the light guide film being configured to reflect light, and in a thickness direction of the laminate, the light guide film being arranged between the cell piece and the back panel, or the light guide film being arranged on a side of the back panel away from the cell piece; the light guide film being arranged at least at one of the first gap or the second gap; four adjacent cell pieces and two first gaps and two second gaps therebetween defining a third gap; the light guide film being arranged at the first gap, the second gap and the third gap; the light guide film at the third gap being two layers; in the thickness direction of the laminate, at least part of the light guide film overlapping edges of two adjacent cell pieces; the light guide film having a width of 4mm to 10mm; the light guide film overlapping the edges of the adjacent cell pieces by a width of 1mm to 5mm; the light guide film comprising at least one of a first film, a second film and a third film; the first film comprising a colored adhesive layer, the colored adhesive layer containing color master batches; the second film comprising a colored coating layer, a base layer and a colored adhesive layer arranged in sequence, the colored adhesive layer being configured to connect the back panel, the colored coating layer containing color master batches, and the colored coating layer and the base layer being configured to reflect light; the third film comprising two colored coating layers, a base layer and an adhesive layer, one of the coating layers, the base layer, the other of the coating layers and the adhesive layer being arranged in sequence; the adhesive layer being configured to connect the back panel, and the coating layer and the base layer being configured to reflect light; the light guide film at any one of the first gap or the second gap being the first film, the second film or the third film; the light guide film comprising at least two of the first film, the second film and the third film; the base layer being made of polyethylene terephthalate, polypropylene or nylon; the laminate further comprising a first adhesive film arranged between the front panel and the cell piece, the first adhesive film being configured to reflect light reflected by the light guide film; the front panel being float glass or embossed glass; the photovoltaic module further comprising a frame, the frame comprising a base and a connecting portion arranged on an upper side of the base, the base comprising a support surface, the connecting portion comprising a first surface and a second surface, the first surface and the second surface being arranged along a length direction and a height direction of the base, the second surface being between the first surface and the support surface in the height direction of the base, one of the first surface and the second surface being a vertical surface, and the other being an inclined surface arranged upwardly and obliquely from one side to the other side close to the support surface. characterized in that ​ ​ 2. The photovoltaic module of claim 1, wherein, ​ ​ ​ 3. The photovoltaic module of claim 1, wherein, ​ 4. The photovoltaic module of claim 3, wherein, ​ ​ 5. The photovoltaic module of claim 1, wherein, ​ ​ ​ ​ ​ 6. The photovoltaic module of claim 5, wherein, ​ 7. The photovoltaic module of claim 5, wherein, ​ 8. The photovoltaic module of claim 1, wherein, ​ ​ 9. The photovoltaic module of claim 1, wherein, ​ The support surface is used to connect with the edge of the bottom surface of the laminate, and at least one of the first surface and the second surface is used to connect with the side surface of the laminate to fix the laminate.

10. The photovoltaic module of claim 9, wherein, The battery piece located at the edge of the back panel has a fourth gap between the edge of the back panel, and the light guide film is also arranged at the fourth gap.

Images