Photovoltaic module

Abstract

The photovoltaic module comprises a battery piece array, a front cover plate, a rear cover plate, a sealant and a reflective film strip, the battery piece array comprises a plurality of solar battery pieces, gaps are formed between the solar battery pieces, and the front cover plate and the rear cover plate are arranged on the light receiving side and the backlight side of the battery piece array respectively. The battery piece array is sealed between the front cover plate and the rear cover plate through the sealant, the reflective film strip is arranged on the side face, facing the battery piece array, of the rear cover plate and provided with a textured area and a pair of reflective slopes, and the pair of reflective slopes are arranged on the two opposite sides of the textured area respectively. The reflective slope gradually inclines towards the rear cover plate in the direction facing the textured area, and the whole textured area and at least part of the reflective slope are exposed to the light receiving side through the gap. According to the photovoltaic module provided by the invention, the light passing through the gap can be reflected towards the solar cell through the textured region and the pair of reflective slopes, so that the light utilization rate of the photovoltaic module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic devices, and more particularly to a photovoltaic module. Background Art

[0002] With the continuous development of new energy technologies, there are increasingly high requirements for photovoltaic modules in terms of improving power generation efficiency and extending service life. Double-glass photovoltaic modules have become the market mainstream due to their excellent weather resistance and mechanical properties. However, during the use of photovoltaic modules, there is a problem that some incident light, such as the light passing through the gaps between the solar cells, cannot be fully utilized, resulting in an impact on the light utilization rate of the photovoltaic module. Therefore, improvement is needed. Summary of the Invention

[0003] The present invention provides a photovoltaic module, which has the advantage of high light utilization rate.

[0004] The photovoltaic module according to an embodiment of the present invention includes: a cell array including a plurality of electrically interconnected solar cells, with a gap between any two adjacent solar cells; a front cover plate disposed on the light-receiving side of the cell array; a rear cover plate disposed on the backlight side of the cell array; a sealant for sealing the cell array between the front cover plate and the rear cover plate; and a reflective film strip disposed on the side of the rear cover plate facing the cell array, the reflective film strip being opposite to at least a part of the gap and extending along the length direction of the gap, the reflective film strip having a textured area facing the front cover plate and extending along the length direction of the reflective film strip and a pair of reflective inclined surfaces, and along the width direction of the reflective film strip, the pair of reflective inclined surfaces are respectively disposed on opposite sides of the textured area, and the reflective inclined surfaces are inclined gradually in the direction towards the textured area and towards the direction closer to the rear cover plate, and all of the textured area and at least a part of the reflective inclined surfaces are exposed to the light-receiving side through the gap.

[0005] According to the photovoltaic module of the embodiment of the present invention, by providing a reflective film strip on the side of the rear cover plate facing the cell array, the reflective film strip has a textured area and a pair of reflective inclined surfaces disposed opposite to the gap, and the light passing through the gap can be reflected towards the solar cells through the textured area and the pair of reflective inclined surfaces, so as to avoid waste of the light entering the gaps between the solar cells, thereby better increasing the light incident amount of the cell array and improving the light utilization rate of the photovoltaic module.

[0006] According to some embodiments of the present invention, the textured area includes a plurality of reflective protrusions arranged along the width direction of the reflective film strip, and the reflective protrusions are in a triangular prism structure extending along the length direction of the reflective film strip; wherein the vertex angle range of the reflective protrusions is 111°-138°; and / or, the dimension X of the reflective protrusions in the width direction of the reflective film strip satisfies: 0<X≤L-2*(a+bc) / tan(δ-90°), wherein L is the gap distance between two solar cells on opposite sides of the reflective film strip in the width direction, a is the thickness of the solar cell, b is the distance from the solar cell to the back cover, c is the thickness of the reflective protrusion, and δ is the vertex angle of the reflective protrusion.

[0007] According to some embodiments of the present invention, the angle between the reflective slope and the back cover is not less than 21°.

[0008] According to some embodiments of the present invention, the textured area includes a plurality of reflective protrusions arranged in an array, and in the direction from the rear cover plate to the front cover plate, the outer peripheral surface of the reflective protrusion extends obliquely toward the center of the reflective protrusion; wherein the reflective protrusion is in the shape of a quadrangular pyramid, a cone or a hemisphere.

[0009] According to some embodiments of the present invention, auxiliary connection areas are provided on opposite sides of the reflective film strip along the width direction, and the auxiliary connection areas are arranged opposite to the corresponding solar cell sheets along the up-down direction.

[0010] According to some embodiments of the present invention, the reflective film strip includes a substrate layer, an adhesive layer and a reflective layer, the textured area and the reflective slope are both formed on the substrate layer, the adhesive layer is arranged on a side of the substrate layer facing the rear cover plate, and the reflective layer is arranged on a side of the substrate layer facing away from the rear cover plate.

[0011] According to some embodiments of the present invention, a reflective glaze strip is further provided on the side of the back cover plate facing the battery cell array, and the reflective glaze strip includes a first area surrounding the area corresponding to the battery cell array on the back cover plate and a second area crossing the area corresponding to the battery cell array on the back cover plate, and an area of the back cover plate corresponding to the second area is provided with a lead hole that passes through the back cover plate and the second area.

[0012] According to some embodiments of the present invention, a plurality of reflective film strips are provided, extending along the length direction and the width direction of the photovoltaic module. The plurality of reflective film strips extending along the length direction of the photovoltaic module and the plurality of reflective film strips extending along the width direction of the photovoltaic module are crossed to form a mesh, and the lead holes are spaced apart from the reflective film strips.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present invention. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention;

[0015] Figure 2 is a partial structural schematic diagram of a light-reflecting film strip of a photovoltaic module according to an embodiment of the present invention;

[0016] Figure 3 is a partial enlarged view of a photovoltaic module according to an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of a light-reflecting protrusion of a light-reflecting film strip of a photovoltaic module according to Embodiment 1 of the present invention;

[0018] Figure 5 is a schematic diagram of a light-reflecting protrusion of a light-reflecting film strip of a photovoltaic module according to Embodiment 2 of the present invention;

[0019] Figure 6 is a schematic diagram of a light-reflecting protrusion of a light-reflecting film strip of a photovoltaic module according to Embodiment 3 of the present invention;

[0020] Figure 7 is a schematic diagram of a light-reflecting protrusion of a light-reflecting film strip of a photovoltaic module according to Embodiment 4 of the present invention;

[0021] Figure 8 is a partial structural schematic diagram of a light-reflecting film strip of a photovoltaic module according to another embodiment of the present invention;

[0022] Figure 9 is Figure 8 a cross-sectional view of the light-reflecting film strip in the length direction;

[0023] Figure 10 is a schematic diagram of a light-reflecting film strip and a light-reflecting glaze strip of a photovoltaic module according to an embodiment of the present invention.

[0024] Reference Signs:

[0025] 100, photovoltaic module;

[0026] 1, cell array; 11, solar cell; 12, gap;

[0027] 2, front cover plate; 3, rear cover plate; 4, sealant;

[0028] 5. Reflective film strip; 51. Substrate layer; 511. Textured area; 5111. Reflective protrusion; 512a. First reflective inclined plane; 512b. Second reflective inclined plane; 513. Auxiliary connection area; 52. Adhesive layer; 53. Reflective layer; 54. Mesh hole;

[0029] 6. Reflective glaze strip; 61. First area; 62. Second area. Detailed implementation manner

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the applicability of other processes and / or the use of other materials.

[0031] It should be noted that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. The terms "parallel", "perpendicular", and "equal" include the described situations and situations similar to the described situations, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurements being discussed and the errors associated with the measurements of specific quantities (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range of approximate equality can be, for example, that the difference between the two equal ones is less than or equal to 5% of either one. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] The photovoltaic module 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0033] As Figure 1 and Figure 2As shown, the photovoltaic module 100 according to an embodiment of the present invention includes: a cell array 1, a front cover plate 2, a back cover plate 3, a sealant 4, and a reflective film strip 5. The cell array 1 includes a plurality of electrically interconnected solar cells 11. There is a gap 12 between any two adjacent solar cells 11. For example, the plurality of solar cells 11 of the cell array 1 can be arranged in an array at intervals along the length direction and the width direction of the photovoltaic module 100. The front cover plate 2 is disposed on the light-receiving side of the cell array 1, the back cover plate 3 is disposed on the backlight side of the cell array 1, the sealant 4 seals the cell array 1 between the front cover plate 2 and the back cover plate 3, and the reflective film strip 5 is disposed on the side of the back cover plate 3 facing the cell array 1. The reflective film strip 5 is opposite to at least part of the gap 12 and extends along the length direction of the gap 12. The reflective film strip 5 has a textured area 511 facing the front cover plate 2 and extending along the length direction of the reflective film strip 5 (such as Figures 4 to 7 as shown by e2 in Figures 4 to 7 ), and a pair of reflective inclined surfaces. Along the width direction of the reflective film strip 5 (such as as shown by e1 in ), the pair of reflective inclined surfaces are respectively disposed on the opposite sides of the textured area 511. The reflective inclined surfaces are inclined gradually in the direction towards the textured area 511 and towards the direction closer to the back cover plate 3. All of the textured area 511 and at least part of the reflective inclined surfaces are exposed to the light-receiving side through the gap 12.

[0034] Among them, the front cover plate 2 is located at the outermost layer of the photovoltaic module 100, and the back cover plate 3 is located at the lowermost layer of the photovoltaic module 100. Both the front cover plate 2 and the back cover plate 3 are optically transparent. For example, both the front cover plate 2 and the back cover plate 3 are glass to ensure light transmittance. For the convenience of description, the two reflective inclined surfaces are respectively defined as a first reflective inclined surface 512a and a second reflective inclined surface 512b and introduced into the following description. The first reflective inclined surface 512a and the second reflective inclined surface 512b are respectively located on the opposite sides of the textured area 511 along the width direction of the reflective film strip 5, and along the direction from the back cover plate 3 to the front cover plate 2, both the first reflective inclined surface 512a and the second reflective inclined surface 512b are inclined and extend in the direction away from the textured area 511, so that the upper surface of the reflective film strip 5 forms a flared structure opposite to the gap 12.

[0035] Specifically, during the operation of the photovoltaic module 100, light passes through the front cover plate 2 and irradiates onto the solar cell array 1. After the solar cell array 1 absorbs the light, it generates an electric current based on the photovoltaic effect to achieve power generation. There are gaps 12 between multiple solar cells 11, and part of the light passes through the front cover plate 2 and enters the gaps 12 of the solar cell array 1. When the light passing through the gaps 12 between adjacent solar cells 11 irradiates on the reflective film strip 5, due to the texturing treatment on the textured area 511, the side of the textured area 511 facing the gap 12 is uneven, so that the light irradiating on the textured area 511 can be reflected and enter the solar cell 11. Moreover, the light can be reflected towards one side of the solar cell 11 through the first reflective inclined surface 512a and towards the other side of the solar cell 11 through the second reflective inclined surface 512b, so as to avoid waste of the light entering the gaps 12 between the solar cells 11, thereby better increasing the light incident amount of the solar cell array 1 and improving the light utilization rate of the photovoltaic module 100.

[0036] For the photovoltaic module 100 according to an embodiment of the present invention, by providing a reflective film strip 5 on the side of the rear cover plate 3 facing the solar cell array 1, the reflective film strip 5 has a textured area 511 disposed opposite to the gap 12 and a pair of reflective inclined surfaces. The light passing through the gap 12 can be reflected towards the solar cell 11 through the textured area 511 and the pair of reflective inclined surfaces, so as to avoid waste of the light entering the gaps 12 between the solar cells 11, thereby better increasing the light incident amount of the solar cell array 1 and improving the light utilization rate of the photovoltaic module 100.

[0037] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, the textured area 511 includes a plurality of reflective protrusions 5111 arranged along the width direction of the reflective film strip 5, and the reflective protrusions 5111 are in the shape of triangular prism structures extending along the length direction of the reflective film strip 5. That is to say, along the width direction of the reflective film strip 5, there is an included angle between the inclined surfaces on the opposite sides of the reflective protrusion 5111. The light can be reflected in a specified direction through the two inclined surfaces, so that the light can be reflected towards the solar cells 11 on both sides and absorbed by the solar cells 11. At the same time, the light receiving area of the reflective protrusion 5111 can be better increased to improve the light utilization rate. Specifically, the reflective protrusion 5111 includes a third reflective inclined surface and a fourth reflective inclined surface symmetrically arranged along the width direction of the reflective film strip 5. The light can be reflected towards the solar cell 11 on one side of the reflective protrusion 5111 through the first reflective inclined surface 512a, and the light can be reflected towards the solar cell 11 on the other side of the reflective protrusion 5111 through the second reflective inclined surface 512b.

[0038] According to some embodiments of the present invention, the apex angle range of the reflective protrusion 5111 is 111°-138°. Thus, the light reflected by the inclined surfaces on the opposite sides of the reflective protrusion 5111 to the front cover plate 2 can undergo total internal reflection at the front cover plate 2, so that the light directly reflected on the front cover plate 2 by the reflective protrusion can all be reflected towards the solar cell 11 through the front cover plate 2 to enter the solar cell 11 for power generation. At the same time, it can ensure that the light reflected by the reflective protrusion 5111 to the adjacent reflective protrusion 5111 can be reflected to the front cover plate 2 again and then undergo total internal reflection, that is, ensure that the light reflected to the front cover plate 2 through the textured area 511 can undergo total internal reflection to improve the light utilization rate of the photovoltaic module 100.

[0039] According to some embodiments of the present invention, the dimension X of the reflective protrusion 5111 in the width direction of the reflective film strip 5 satisfies: X = L - 2*(a + b - c) / tan(δ - 90°); where L is the distance of the gap 12 between the two solar cells 11 on the opposite sides of the reflective film strip 5 in the width direction, a is the thickness of the solar cell 11, b is the distance from the solar cell 11 to the rear cover plate 3, c is the thickness of the reflective protrusion 5111, and δ is the apex angle of the reflective protrusion 5111. Thus, it can better ensure the rationality of the dimension of the reflective protrusion 5111 in the width direction of the reflective film strip 5 to ensure the reflective effect of the reflective protrusion 5111.

[0040] According to some embodiments of the present invention, the apex angle range of the reflective protrusion 5111 is 111°-138°, and the dimension X of the reflective protrusion 5111 in the width direction of the reflective film strip 5 satisfies: X = L - 2*(a + b - c) / tan(δ - 90°). Thus, it can better ensure the rationality of the dimension of the reflective protrusion 5111 in the width direction of the reflective film strip 5, and at the same time, it can ensure that the light reflected to the front cover plate 2 through the textured area 511 can undergo total internal reflection to improve the light utilization rate of the photovoltaic module 100.

[0041] According to some embodiments of the present invention, the angles between the first reflective inclined surface 512a and the second reflective inclined surface 512b and the rear cover plate 3 are not less than 21°. Specifically, the angles between the first reflective inclined surface 512a and the second reflective inclined surface 512b and the rear cover plate 3 are greater than or equal to 21°. The incident angles and reflection angles of the perpendicularly incident light on the first reflective inclined surface 512a and the second reflective inclined surface 512b are both greater than or equal to 21°. When the light reflected by the first reflective inclined surface 512a and the second reflective inclined surface 512b reaches the front cover plate 2, the incident angle of reflection at the interface of the front cover plate 2 close to the air is greater than or equal to 42°. The front cover plate 2 is made of glass, and the total reflection angle of the front cover plate 2 is 42°. Thus, the light reflected to the front cover plate 2 through the first reflective inclined surface 512a and the second reflective inclined surface 512b can undergo total reflection, so that more light can enter the solar cell 11 after being reflected by the front cover plate 2 for power generation, thereby improving the light utilization rate of the photovoltaic module 100.

[0042] According to some embodiments of the present invention, as Figures 5 to 7 shown, the textured area 511 includes a plurality of reflective protrusions 5111 arranged in an array. In the direction from the rear cover plate 3 to the front cover plate 2, the outer peripheral surface of the reflective protrusion 5111 extends obliquely toward the center of the reflective protrusion 5111. Among them, the outer peripheral surfaces of the reflective protrusions 5111 can all reflect light, and it can be understood that the outer peripheral surfaces at different positions of the reflective protrusions 5111 can reflect light in different directions. Thus, by increasing the number of the reflective protrusions 5111, the number of angles at which the textured area 511 reflects light can be preferably increased, that is, the diversity of the angles at which the reflective film strip 5 reflects light can be increased, so that the reflected light can be better reflected to multiple solar cells 11 for absorption, thereby improving the light utilization rate.

[0043] According to some embodiments of the present invention, the reflective protrusion 5111 is one of a quadrangular pyramid shape, a conical shape or a hemispherical shape. For example, the textured area 511 may include a plurality of quadrangular pyramid-shaped (i.e., pyramid-shaped, as Figure 5 shown) reflective protrusions 5111 arranged in an array along the length direction and the width direction of the reflective film strip 5; the textured area 511 may include a plurality of conical-shaped (as Figure 6 shown) reflective protrusions 5111 arranged in an array along the length direction and the width direction of the reflective film strip 5; the textured area 511 may further include a plurality of hemispherical-shaped (as Figure 7 shown) reflective protrusions 5111 arranged in an array along the length direction and the width direction of the reflective film strip 5. Among them, through the quadrangular pyramid-shaped, conical-shaped or hemispherical-shaped reflective protrusions 5111, the diversity of the angles at which the reflective protrusions 5111 reflect light can be preferably increased, so as to improve the light utilization rate.

[0044] According to some embodiments of the present invention, Figure 8 and Figure 9 As shown, the two opposite sides of the reflective film strip 5 along the width direction are provided with auxiliary connection areas 513, and the auxiliary connection areas 513 are arranged opposite to the corresponding solar cell 11 along the vertical direction. Therefore, the reflective film strip 5 can be connected to the rear cover plate 3 through the auxiliary connection areas 513, so that the connection position between the reflective film strip 5 and the rear cover plate 3 can be increased to improve the stability of the fixation of the reflective film strip 5. It should be noted that the auxiliary connection areas 513 can be set according to actual needs, such as Figure 2 As shown, the auxiliary connection area 513 may also be omitted.

[0045] According to some embodiments of the present invention, the reflective film strip 5 includes a substrate layer 51, an adhesive layer 52 and a reflective layer 53, the textured area 511 and the reflective slope are both formed on the substrate layer 51, the adhesive layer 52 is arranged on the side of the substrate layer 51 facing the rear cover plate 3, and the reflective layer 53 is arranged on the side of the substrate layer 51 facing away from the rear cover plate 3.

[0046] That is to say, the reflective layer 53 covers the textured area 511, the first reflective slope 512a and the second reflective slope 512b on the side facing the front cover 2, and the reflective layer 53 is used for reflecting the defense line. By adjusting the shapes of the textured area 511, the first reflective slope 512a and the second reflective slope 512b, the orientation of the reflective layer 53 is changed to make the light reflect directionally, so that the light emitted through the reflective film strip 5 can be completely reflected to the solar cell 11 through the front cover 2 as much as possible, so as to improve the light utilization rate.

[0047] In addition, the adhesive layer 52 is filled between the substrate layer 51 and the rear cover plate 3 and is adhesively connected to the substrate layer 51 and the rear cover plate 3 at the same time, that is, the reflective film strip 5 can be adhesively connected to the rear cover plate 3 through the adhesive layer 52, which can better simplify the connection structure between the reflective film strip 5 and the rear cover plate 3, and at the same time ensure that the reflective film strip 5 and the rear cover plate 3 are tightly fitted. In addition, the adhesive connection occupies less thickness space, so that the overall thickness size of the photovoltaic module 100 can be better controlled.

[0048] According to some embodiments of the present invention, Figure 1 and Figure 10 As shown, a reflective glaze strip 6 is further provided on the side of the rear cover plate 3 facing the battery cell array 1. The reflective glaze strip 6 includes a first area 61 surrounding the corresponding area of the battery cell array 1 on the rear cover plate 3 and a second area 62 crossing the corresponding area of the battery cell array 1 on the rear cover plate 3. The area of the rear cover plate 3 corresponding to the second area 62 is provided with a lead hole passing through the rear cover plate 3 and the second area 62.

[0049] Among them, the first region 61 of the reflective glaze strip 6 is in a frame shape extending along and closing the outer peripheral edge of the rear cover plate 3, and the second region 62 is located at the middle position of the rear cover plate 3 in the length direction and extends to both ends along the width direction of the rear cover plate 3 to be connected to the first region 61. The through hole is used for passing the wire harness, so that the lead connected to the battery cell array 1 can be led out through the through hole to output current. Therefore, by coating the second region 62 of the reflective glaze strip 6 in the region where the through hole is provided, the through hole can be avoided from being blocked to ensure that the lead can be smoothly led out.

[0050] In addition, by providing the reflective film strip 5, the light entering the gap 12 of the battery cell array 1 can be reflected upward to the front cover plate 2 and then reflected to the battery cell array 1 through the front cover plate 2. At the same time, the light around the battery cell array 1 can be reflected to the battery cell array 1 through the front cover plate 2 by the first region 61 of the reflective glaze strip 6. Moreover, by providing the first region 61 of the reflective glaze strip 6 at the outer peripheral edge of the rear cover plate 3, the deficiency that the reflective film strip 5 cannot be provided at the outer peripheral edge of the rear cover plate 3 can be better compensated. For example, if the reflective film strip 5 is provided at the outer peripheral edge of the rear cover plate 3, the reflective film strip 5 may be extruded after being squeezed during the lamination process of the photovoltaic module 100. At the same time, the reflective film strip 5 can make the light undergo directional reflection, and the light utilization rate of the reflective film strip 5 is higher than that of the reflective glaze strip 6. Therefore, through the cooperation of the reflective glaze strip 6 and the reflective film strip 5, while compensating for the deficiency that the reflective film strip 5 cannot be provided at the outer peripheral edge of the rear cover plate 3, the reflective performance can be improved to improve the light utilization rate of the photovoltaic module 100. In addition, the heat accumulation on the rear cover plate 3 of the photovoltaic module 100 under light can be avoided, so that the overheating damage of the photovoltaic module 100 can be avoided and the service life of the photovoltaic module 100 can be extended.

[0051] According to some embodiments of the present invention, a plurality of reflective film strips 5 are provided and extend along the length direction and the width direction of the photovoltaic module 100. The plurality of reflective film strips 5 extending along the length direction of the photovoltaic module 100 and the plurality of reflective film strips 5 extending along the width direction of the photovoltaic module 100 intersect to form a network. Specifically, the plurality of crisscrossed reflective film strips 5 form a network structure to form a plurality of mesh holes 54 arranged in an array, and the plurality of mesh holes 54 correspond to the plurality of solar cells 11 one by one. That is to say, each solar cell 11 is disposed at the corresponding mesh hole 54. Thus, the gap 12 between any two adjacent solar cells 11 can be better covered by the reflective film strip 5, and at the same time, some materials in the regions of the reflective film strip 5 and the solar cell 11 opposite to each other in the thickness direction of the photovoltaic module 100 can be saved. While ensuring the reflective performance of the reflective film strip 5, the usage amount of the reflective film strip 5 can be reduced, so that the production cost of the photovoltaic module 100 can be reduced while improving the performance of the photovoltaic module 100.

[0052] Specifically, during the production process of the photovoltaic module 100, multiple reflective film strips 5 can be cross-pasted on the upper surface along the length direction and the width direction of the rear cover plate 3, which can reduce the difficulty of setting the reflective film strips 5 as a mesh, improve the assembly efficiency of the photovoltaic module 100, and at the same time help reduce the production cost.

[0053] Furthermore, the lead holes are arranged at intervals from the reflective film strips 5. Thus, it is possible to avoid the reflective film strips 5 from blocking the lead holes, facilitating the connection wires to pass through the lead holes.

[0054] In some embodiments, both ends of the reflective film strip 5 in the extending direction are connected to the reflective enamel strip 6. For example, both ends of the reflective film strip 5 extending along the length direction of the photovoltaic module 100 are respectively connected to the two side edges of the first region 61 in the length direction of the photovoltaic module 100; both ends of the reflective film strip 5 extending along the width direction of the photovoltaic module 100 are respectively connected to the two side edges of the first region 61 in the width direction of the photovoltaic module 100. Thus, by connecting both ends of the reflective film strip 5 to the reflective enamel strip 6, the risk of light leakage caused by the gap 12 between the reflective film strip 5 and the reflective enamel strip 6 can be better avoided, ensuring that the light passing through the gap 12 of the cell array 1 can be reflected by the reflective film strip 5 and the reflective enamel strip 6. For example, it can be directly reflected onto the solar cell 11, or reflected onto the front cover plate 2 and then reflected onto the solar cell 11, so as to improve the light utilization rate of the photovoltaic module 100. In addition, the reflective enamel strip 6 can be used as part of the frame of some of the mesh holes 54. Thus, through the cooperation of the reflective enamel strip 6 and the reflective film strip 5, the space utilization rate on the rear cover plate 3 can be improved, and at the same time, the usage cost of the reflective film strip 5 can be reduced.

[0055] According to some embodiments of the present invention, the projection of the mesh hole 54 on the reference plane is the first projection, and the projection of the solar cell 11 on the reference plane is the second projection. The first projection is located within the second projection, and the reference plane is perpendicular to the thickness direction of the photovoltaic module 100. Among them, it can be that the first projection and the second projection completely coincide, that is, each solar cell 11 is tightly embedded in the corresponding mesh hole 54, or the area of the second projection is larger than the area of the first projection, and there is a gap between the outer peripheral contour line of the first projection and the outer peripheral contour line of the second projection, that is, the size of the solar cell 11 is larger than the size of the mesh hole 54, and the outer peripheral edge of the solar cell 11 presses on the reflective film strip 5 at the edge of the mesh hole 54. Thus, it is possible to better avoid the existence of a gap between the solar cell 11 and the edge of the mesh hole 54, thereby avoiding light leakage caused by the existence of the gap, and ensuring that the reflective film strip 5 can reflect the light entering the gap 12 between the multiple solar cells 11 back onto the solar cell 11, so as to improve the light utilization rate.

[0056] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that, include: A cell array comprises a plurality of electrically interconnected solar cells, with a gap between any two adjacent solar cells; A front cover plate, arranged on the light-receiving side of the cell array; A rear cover plate, arranged on the backlight side of the battery array; A sealant, used to seal the battery cell array between the front cover plate and the rear cover plate; as well as A reflective film strip is arranged on the side of the rear cover plate facing the battery cell array, the reflective film strip is opposite to at least part of the gap and extends along the length direction of the gap, the reflective film strip has a textured area facing the front cover plate and extending along the length direction of the reflective film strip and a pair of reflective slopes, along the width direction of the reflective film strip, the pair of reflective slopes are respectively arranged on opposite sides of the textured area, the reflective slopes gradually tilt toward the direction close to the rear cover plate in the direction toward the textured area, and all of the textured area and at least part of the reflective slopes are exposed to the light-receiving side through the gap.

2. The photovoltaic module according to claim 1, wherein, The textured area includes a plurality of reflective protrusions arranged along the width direction of the reflective film strip, and the reflective protrusions are in a triangular prism structure extending along the length direction of the reflective film strip; Wherein, the vertex angle of the reflective protrusion ranges from 111° to 138°; And / or, a dimension X of the reflective protrusion in the width direction of the reflective film strip satisfies: 0<X≤L-2*(a+bc) / tan(δ-90°), wherein L is the gap distance between two solar cells on opposite sides of the reflective film strip in the width direction, a is the thickness of the solar cell, b is the distance from the solar cell to the back cover, c is the thickness of the reflective protrusion, and δ is the top angle of the reflective protrusion.

3. The photovoltaic module according to claim 1 or 2, characterized in that, The angle between the reflective slope and the rear cover is not less than 21°.

4. The photovoltaic module according to claim 1, wherein The textured area includes a plurality of reflective protrusions arranged in an array, and in the direction from the rear cover plate to the front cover plate, the outer peripheral surface of the reflective protrusion extends obliquely toward the center of the reflective protrusion; Wherein, the reflective protrusion is in a shape of a quadrangular pyramid, a cone or a hemisphere.

5. The photovoltaic module according to claim 1, characterized in that, The two opposite sides of the reflective film strip along the width direction are both provided with auxiliary connection areas, and the auxiliary connection areas are arranged opposite to the corresponding solar cell sheets along the up-down direction.

6. The photovoltaic module according to claim 1, characterized in that, The reflective film strip comprises a substrate layer, an adhesive layer and a reflective layer, the textured area and the reflective slope are both formed on the substrate layer, the adhesive layer is arranged on a side of the substrate layer facing the rear cover plate, and the reflective layer is arranged on a side of the substrate layer facing away from the rear cover plate.

7. The photovoltaic module according to claim 1, characterized in that A reflective glaze strip is also provided on the side of the rear cover plate facing the battery cell array, and the reflective glaze strip includes a first area surrounding the corresponding area of the battery cell array on the rear cover plate and a second area crossing the corresponding area of the battery cell array on the rear cover plate, and a lead hole is provided in the area of the rear cover plate corresponding to the second area, which passes through the rear cover plate and the second area.

8. The photovoltaic module according to claim 7, wherein A plurality of the reflective film strips are provided and extend along the length direction and the width direction of the photovoltaic module. The plurality of the reflective film strips extending along the length direction of the photovoltaic module and the plurality of the reflective film strips extending along the width direction of the photovoltaic module intersect to form a mesh, and the lead holes are arranged at intervals with the reflective film strips.

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