Photovoltaic module

Abstract

The utility model relates to a photovoltaic module, which comprises a plurality of solar cells, the plurality of solar cells are connected through a conductive metal layer positioned on the back surface, a shielding layer is arranged in a gap among the plurality of solar cells, the shielding layer comprises a core layer, and the color of the core layer is basically consistent with that of the solar cells; meanwhile, the shielding layer is located between the solar cell and the conductive metal layer, so that the shielding layer covers the gap and also covers the conductive metal layer exposed from the gap, the photovoltaic module presents a uniform color on the whole, and the appearance of the photovoltaic module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic module. Background Art

[0002] A photovoltaic module is formed by multiple solar cells electrically connected by a conductive metal layer. The conductive metal layer is usually located on the back of the multiple solar cells and its color is different from that of the solar cells. The conductive metal layer exposed from the gaps between the solar cells greatly affects the appearance of the photovoltaic module. Summary of the invention

[0003] According to a first aspect of the utility model, a photovoltaic module is provided, the photovoltaic module comprising an upper cover plate, a plurality of solar cells, a shielding layer, a conductive metal layer and a back plate; the conductive metal layer is located on a side of the solar cell away from the upper cover plate, and is used to electrically connect the plurality of solar cells; the shielding layer is located at the gap between the plurality of solar cells, and is located between the plurality of solar cells and the conductive metal layer;

[0004] The shielding layer includes: a first bonding layer, a core layer and a second bonding layer which are stacked, and the core layer is located between the first bonding layer and the second bonding layer; wherein the core layer has substantially the same color as the solar cell sheet.

[0005] In an exemplary embodiment, the difference between the L value of the core layer and the L value of the solar cell is less than 5, the difference between the a value of the core layer and the a value of the solar cell is less than 5, and the difference between the b value of the core layer and the b value of the solar cell is less than 5.

[0006] In an exemplary embodiment, the core layer includes a high molecular cross-linked resin added with an inorganic pigment or an organic pigment.

[0007] In an exemplary embodiment, the shielding layer further includes a diffusion prevention layer, which is located between the first bonding layer and the core layer and is used to prevent the organic pigment or inorganic pigment added in the core layer from diffusing into the first bonding layer.

[0008] In an exemplary embodiment, the shielding layer further includes an insulating layer, wherein the insulating layer is located between the core layer and the second bonding layer, the melting point of the insulating layer is greater than 300° C., and the thickness of the insulating layer is in a range of 10 μm to 50 μm.

[0009] In an exemplary embodiment, the shielding layer further includes a transition layer, wherein the transition layer is located between the insulating layer and the second bonding layer to improve adhesion between the insulating layer and the second bonding layer, and a material of the transition layer includes acrylic resin or fluorocarbon resin.

[0010] In an exemplary embodiment, the first adhesive layer and the second adhesive layer have the same material, and the same material includes at least one of polyurethane resin, epoxy resin, silicone resin, acrylic resin, ethylene-vinyl acetate copolymer EVA and polyolefin elastomer POE.

[0011] In an exemplary embodiment, the first adhesive layer in the shielding layer is in contact with and connected to the solar cell sheet, and the second adhesive layer in the shielding layer is in contact with and connected to the conductive metal layer.

[0012] In an exemplary embodiment, the shielding layer is in the shape of an elongated strip, and the width of the shielding layer is less than 10 mm.

[0013] In an exemplary embodiment, the photovoltaic module further includes: an adhesive film layer, wherein the adhesive film layer is located between the upper cover plate and the solar cell sheet, and / or between the solar cell sheet and the back plate.

[0014] The photovoltaic module provided in the embodiment of the utility model includes a plurality of solar cells, which are connected by a conductive metal layer located on the back side, and a shielding layer is arranged in the gap between the plurality of solar cells, and the shielding layer includes a core layer, and the color of the core layer is basically consistent with that of the solar cells; at the same time, the shielding layer is located between the solar cells and the conductive metal layer, so that the shielding layer covers the above-mentioned gap while also covering the conductive metal layer exposed from the gap, so that the photovoltaic module presents a uniform color as a whole, thereby improving the appearance of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further details, features and advantages of the present invention are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 is a schematic diagram of a photovoltaic module provided by an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the position between the solar cell and the shielding layer provided by the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the shielding layer provided in the embodiment of the utility model. Figure 1 ;

[0019] Figure 4 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 2 ;

[0020] Figure 5 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 3 ;

[0021] Figure 6 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 4 . DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0023] It should be understood that the various steps described in the method implementation of the present utility model can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this respect.

[0024] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Figure 1 is a schematic diagram of a photovoltaic module provided by an embodiment of the utility model, such as Figure 1 As shown, the photovoltaic module includes an upper cover plate 11 arranged from top to bottom, a plurality of solar cells 13, a shielding layer 14, a conductive metal layer 15 and a back plate 12; the upper cover plate 11 can be transparent glass, the plurality of solar cells 13 are located between the upper cover plate 11 and the back plate 12, and light is incident from the upper cover plate 11 and absorbed by the solar cells 13.

[0028] The conductive metal layer 15 is located on the back side of the plurality of solar cells 13 and electrically connects the plurality of solar cells 13. In practical applications, the conductive metal layer 15 includes a plurality of metal wires separated from each other, which are used to collect the current generated by the plurality of solar cells 13 to a bus bar.

[0029] Figure 2 Schematic diagram of the position between the solar cell and the shielding layer provided by the embodiment of the utility model, such as Figure 2 As shown, the shielding layer 14 is located in the gaps between the plurality of solar cells 13, and the width of the shielding layer 14 is greater than the width of the gaps, so that both ends of the shielding layer 14 in the width direction are respectively bonded to the back surfaces of two adjacent solar cells.

[0030] In a specific embodiment, the shielding layer is in the shape of an elongated strip, and the width of the shielding layer is less than 10 mm.

[0031] Figure 3 This is a schematic diagram of the shielding layer provided in the embodiment of the utility model. Figure 1The shielding layer 14 includes a first adhesive layer 141, a core layer 143 and a second adhesive layer 142 which are stacked, and the core layer 143 is located between the first adhesive layer 141 and the second adhesive layer 142; wherein the core layer 143 is substantially consistent with the color of the solar cell 13. In practical applications, the first adhesive layer 141 is bonded to the back of the solar cell 13, and the second adhesive layer 142 is bonded to the conductive metal layer 15 and the backplane. In other words, the shielding layer 14 is located between the solar cell 13 and the conductive metal layer 15, so that the shielding layer 14 can shield the conductive metal layer while shielding the gap between the solar cells, thereby preventing the conductive metal layer from being exposed from the gap between the solar cells and reducing the aesthetics of the photovoltaic module.

[0032] In a specific embodiment, the first bonding layer and the second bonding layer have the same material, and the same material includes at least one of polyurethane resin, epoxy resin, silicone resin, acrylic resin, ethylene-vinyl acetate copolymer EVA and polyolefin elastomer POE.

[0033] The photovoltaic module provided in the embodiment of the utility model includes a plurality of solar cells, which are connected by a conductive metal layer located on the back side, and a shielding layer is arranged in the gap between the plurality of solar cells, and the shielding layer includes a core layer, and the color of the core layer is basically consistent with that of the solar cells; at the same time, the shielding layer is located between the solar cells and the conductive metal layer, so that the shielding layer covers the above-mentioned gap while also covering the conductive metal layer exposed from the gap, so that the photovoltaic module presents a uniform color as a whole, thereby improving the appearance of the photovoltaic module.

[0034] In order to make the core layer basically consistent with the color of the solar cell, preferably, the difference between the L value of the core layer and the L value of the solar cell is less than 5, the difference between the a value of the core layer and the a value of the solar cell is less than 5, and the difference between the b value of the core layer and the b value of the solar cell is less than 5; more preferably, the difference between the L value of the core layer and the L value of the solar cell is less than 2, the difference between the a value of the core layer and the a value of the solar cell is less than 2, and the difference between the b value of the core layer and the b value of the solar cell is less than 2.

[0035] In practical applications, the core layer can be a high molecular weight cross-linked resin added with organic pigments or inorganic pigments, which can absorb light within a specific wavelength range, so that the L value, a value, and b value of the core layer are as close as possible to the L value, a value, and b value of the solar cell, so that the shielding layer and the solar cell appear to have basically the same color when observed by the human eye, thereby improving the appearance of the photovoltaic module.

[0036] Figure 4 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 2 ,like Figure 4 As shown, the shielding layer 14 further includes a diffusion barrier layer 144 , which is located between the first bonding layer 141 and the core layer 143 and is used to prevent the organic pigment or inorganic pigment added in the core layer from diffusing outwards.

[0037] Figure 5 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 3 ,like Figure 5 As shown, the shielding layer 14 further includes an insulating layer 145 , which is located between the core layer 143 and the second adhesive layer 142 . The melting point of the insulating layer 145 is greater than 300° C., and the thickness of the insulating layer 145 is in the range of 10 μm to 50 μm.

[0038] Figure 6 This is a schematic diagram of a shielding layer provided by another embodiment of the utility model. Figure 4 ,like Figure 6 As shown, the shielding layer 14 further includes a transition layer 146, which is located between the insulating layer 145 and the second bonding layer 142 to improve the adhesion between the insulating layer 145 and the second bonding layer 142. The material of the transition layer 142 includes acrylic resin or fluorocarbon resin.

[0039] In practical applications, the photovoltaic module further includes other functional layers, such as an adhesive film layer, and the adhesive film layer is located between the upper cover plate and the solar cell, and / or between the solar cell and the back plate.

[0040] The above description is only some embodiments of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the above utility model. For example, the above features are replaced with the technical features of the utility model (but not limited to) with similar functions in the utility model of the utility model to form a technical solution.

[0041] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic module comprises an upper cover plate, a plurality of solar cells, a shielding layer, a conductive metal layer and a back plate; the conductive metal layer is located on a side of the solar cell away from the upper cover plate, and is used to electrically connect the plurality of solar cells; The shielding layer is located at the gaps between the plurality of solar cells and between the plurality of solar cells and the conductive metal layer; The shielding layer includes: a first bonding layer, a core layer and a second bonding layer which are stacked, and the core layer is located between the first bonding layer and the second bonding layer; wherein the core layer has substantially the same color as the solar cell sheet.

2. The photovoltaic module according to claim 1, characterized in that: The difference between the L value of the core layer and the L value of the solar cell is less than 5, the difference between the a value of the core layer and the a value of the solar cell is less than 5, and the difference between the b value of the core layer and the b value of the solar cell is less than 5.

3. The photovoltaic module according to claim 1, characterized in that: The core layer includes a high molecular cross-linked resin added with an inorganic pigment or an organic pigment.

4. The photovoltaic module according to claim 3, characterized in that: The shielding layer further includes a diffusion prevention layer, which is located between the first bonding layer and the core layer and is used to prevent the organic pigment or inorganic pigment added in the core layer from diffusing into the first bonding layer.

5. The photovoltaic module according to claim 1, characterized in that: The shielding layer further includes an insulating layer, and the insulating layer is located between the core layer and the second bonding layer. The melting point of the insulating layer is greater than 300° C., and the thickness of the insulating layer ranges from 10 μm to 50 μm.

6. The photovoltaic module according to claim 5, characterized in that: The shielding layer further includes a transition layer, which is located between the insulating layer and the second bonding layer to improve the adhesion between the insulating layer and the second bonding layer. The material of the transition layer includes acrylic resin or fluorocarbon resin.

7. The photovoltaic module according to claim 1, characterized in that: The first adhesive layer in the shielding layer is in contact with and connected to the solar cell sheet, and the second adhesive layer in the shielding layer is in contact with and connected to the conductive metal layer.

8. The photovoltaic module according to claim 1, characterized in that: The shielding layer is in the shape of an elongated strip, and the width of the shielding layer is less than 10 mm.

9. The photovoltaic module according to claim 1, characterized in that: Also includes: An adhesive film layer, wherein the adhesive film layer is located between the upper cover plate and the solar cell sheet, and / or between the solar cell sheet and the back plate.

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