Photovoltaic laminated piece and photovoltaic module

Abstract

The invention provides a photovoltaic laminated part and a photovoltaic module, relates to the technical field of photovoltaic, and aims to solve the technical problem that the photovoltaic module is difficult to recycle and disassemble. The photovoltaic laminated piece comprises front plate glass, back plate glass and a battery string array located between the front plate glass and the back plate glass, the front plate glass is formed by splicing a plurality of first glass sheets, and the back plate glass is formed by splicing a plurality of second glass sheets; at least one first splicing seam is arranged among the plurality of first glass sheets, and at least one second splicing seam is arranged among the plurality of second glass sheets; the extending direction of the at least one first splicing seam is perpendicular to the extending direction of the at least one second splicing seam. According to the photovoltaic laminated piece, the front plate glass and the back plate glass are respectively formed by splicing the plurality of glass sheets, and in the process of scrapping and recycling the photovoltaic module, each glass sheet can be respectively and quickly stripped and recycled from the photovoltaic cell string array, so that the energy consumption in the recycling process is reduced, the carbon emission is reduced, and the development of carbon neutralization is facilitated.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, and in particular to a photovoltaic laminate and a photovoltaic module. Background Art

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

[0003] With the continuous development of the new energy industry, the proportion of demand for photovoltaic modules is increasing. It is expected that the number of retired photovoltaic modules will increase sharply after the expiration of their service life in the future. How to deal with discarded photovoltaic modules will become a focus of attention. At present, the recycling and disassembly of photovoltaic modules mainly include mechanical disassembly, physical disassembly and chemical disassembly. For example, after the photovoltaic module is soaked or heated as a whole, the layers of materials of the photovoltaic laminate are separated.

[0004] In the related art, the recycling and disassembly methods all require the entire photovoltaic module to be processed, which makes it difficult to quickly peel and recycle. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic laminate and a photovoltaic module to solve the technical problem of the difficulty in recycling and disassembling the photovoltaic module.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a photovoltaic laminate, comprising a front glass, a back glass, and a battery string array located between the front glass and the back glass, wherein the front glass is formed by splicing a plurality of first glass sheets, and the back glass is formed by splicing a plurality of second glass sheets;

[0008] There is at least one first joint seam between the plurality of the first glass sheets, and there is at least one second joint seam between the plurality of the second glass sheets;

[0009] An extension direction of at least one of the first joint seams is perpendicular to an extension direction of at least one of the second joint seams.

[0010] According to at least one embodiment of the present invention, in the first stitching seam and the second stitching seam extending in the same direction, the orthographic projection of the first stitching seam on the back panel glass does not overlap with the second stitching seam.

[0011] According to at least one embodiment of the present invention, the battery string array has a plurality of gaps, and each of the first joint seams is opposite to a corresponding gap, wherein the gaps include gaps between battery strings or gaps between battery sheets.

[0012] According to at least one embodiment of the present invention, the width of the first joint seam is consistent with the width of the corresponding gap.

[0013] According to at least one embodiment of the present invention, the width of the second joint seam is greater than or equal to the width of the gap.

[0014] According to at least one embodiment of the present invention, the edge and / or corner of the first glass sheet is provided with a first chamfer; and / or,

[0015] The edge and / or corner of the second glass sheet is provided with a second chamfer.

[0016] According to at least one embodiment of the present invention, the photovoltaic laminate further comprises at least one first insulating strip, wherein the first insulating strip is embedded in the first joint; and / or,

[0017] The photovoltaic laminate further comprises at least one second insulating strip, wherein the second insulating strip is embedded in the second joint seam.

[0018] According to at least one embodiment of the present invention, the photovoltaic laminate further comprises at least one first shading strip, wherein the first shading strip is covered on the first insulating strip and is located on a side of the first insulating strip away from the battery string array; and / or,

[0019] The photovoltaic laminate further includes at least one second shading strip, which is covered on the second insulating strip and located on a side of the second insulating strip away from the battery string array.

[0020] According to at least one embodiment of the present invention, the photovoltaic laminate further comprises at least one first insulating gasket, the first insulating gasket is covered on the first insulating strip and is located on a side of the first insulating strip facing the battery string array; and / or,

[0021] The photovoltaic laminate further includes at least one second insulating strip, which is covered on the second insulating strip and located on a side of the second insulating strip facing the battery string array.

[0022] According to at least one embodiment of the present invention, the photovoltaic laminate further comprises at least one support strip, wherein the support strip is covered on the second joint, and two partial portions of the support strip are respectively attached to the two second glass sheets forming the second joint, and are located on the side of the second joint away from the battery string array.

[0023] In a second aspect, the present invention further provides a photovoltaic module, comprising the photovoltaic laminate of the first aspect.

[0024] Among the one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0025] The photovoltaic laminate of the exemplary embodiment of the present invention comprises a front glass, a back glass and a photovoltaic cell string array located between the front glass and the back glass, wherein the front glass is formed by splicing a plurality of first glass sheets, and the back glass is formed by splicing a plurality of second glass sheets. A first splicing seam is formed after the plurality of first glass sheets are spliced, and a second splicing seam is formed after the plurality of second glass sheets are spliced, and at least one of the first splicing seams is perpendicular to at least one of the second splicing seams, so that the front glass and the back glass can maintain a certain support strength for the photovoltaic laminate. Compared with the prior art, the disassembly of the photovoltaic module with a whole front glass and back glass requires a container and equipment that can accommodate the entire photovoltaic module, which has high requirements on resources and energy consumption. The applicant paid attention to the recycling and disassembly of photovoltaic laminates. The front glass and the back glass are formed by splicing multiple pieces of glass respectively. During the recycling of scrapped photovoltaic modules, each glass piece can be quickly peeled off and recycled from the photovoltaic cell string array by locally heating each piece of glass in turn, thereby reducing energy consumption in the recycling process, reducing carbon emissions, and facilitating the development of carbon neutrality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention, and these drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification;

[0027] Figure 1 is a schematic structural diagram of a photovoltaic cell string array according to an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a front glass (two first glass sheets) according to an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a back glass (two second glass sheets) according to an embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of a front glass (two first glass sheets) according to another embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of a back plate glass (two second glass sheets) according to another embodiment of the present invention;

[0032] Figure 6 is a schematic structural diagram of a front glass sheet (four first glass sheets) according to an embodiment of the present invention;

[0033] Figure 7 is a schematic structural diagram of a back glass (nine second glass sheets) according to an embodiment of the present invention;

[0034] Figure 8 is a schematic structural diagram of a back panel glass (with support strips) according to an embodiment of the present invention;

[0035] Fig. 9 Schematic diagram of the cross-sectional structure of a photovoltaic laminate according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 10. front glass plate; 11. first glass sheet; 111. first joint seam; 112. first chamfer;

[0038] 20. back plate glass; 21. second glass sheet; 211. second joint seam; 212. second chamfer; 213. lead-out hole;

[0039] 30. Support bar;

[0040] 40. Packaging film;

[0041] 51. first insulating strip; 52. second insulating strip;

[0042] 61. first shading strip; 62. second shading strip;

[0043] 71. a first insulating pad; 72. a second insulating pad;

[0044] 80. Battery string array; 81. Gap. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] Fig. 9 Schematic diagram of the cross-sectional structure of a photovoltaic laminate according to an embodiment of the present invention. Fig. 9 As shown, the photovoltaic laminate in the related art includes a front glass 10, a packaging film 40, a battery string array 80, another packaging film 40 and a back glass 20 stacked together in sequence from the light-receiving surface (front) to the backlight surface (back). After the lamination process, the packaging film 40 will fix the above five layers of materials together to form a photovoltaic laminate.

[0047] For example, the encapsulation film 40 may be a polyethylene-polyvinyl acetate copolymer (EVA) film, or a polyolefin elastomer (POE) film, an EVA / POE laminated film, an EVA / POE / EVA laminated film, or a POE / EVA / POE laminated film. The five layers of material are stacked and placed in a laminator, where the two layers of encapsulation film 40 are melted under the action of heat and pressure, and a strong bond is formed between the layers, thereby forming a finished photovoltaic laminate.

[0048] When the photovoltaic laminate is equipped with a frame on the side, a photovoltaic module is formed. In the related art, the front glass 10 and the back glass 20 are both a whole glass plate, which serves the purpose of protecting and sealing the battery string array 80. It should be noted that the battery string array 80 refers to: a photovoltaic battery string is formed by connecting a plurality of photovoltaic cells in series, and the plurality of photovoltaic battery strings are electrically connected through welding strips, and are electrically connected to each welding strip through bus bars, and the current is collected to the bus bars, and the bus bars are led out from the back of the photovoltaic laminate, and the current is sent to the inverter through the junction box to connect to the power grid.

[0049] As photovoltaic modules are retired after their foreseeable lifespan expires, applicants are concerned that the entire photovoltaic module disassembly process is time-consuming and labor-intensive, which is not conducive to low-carbon and environmental protection at the recycling end.

[0050] In response to the above problems, the photovoltaic laminate of an exemplary embodiment of the present invention uses multiple glass sheets to splice the entire glass panels of the front glass 10 and the back glass 20, and crosses at least one first splicing seam 111 of the front glass 10 with at least one second splicing seam 211 of the back glass 20 to maintain the overall strength of the photovoltaic module.

[0051] The photovoltaic laminate of an exemplary embodiment of the present invention includes a front glass panel 10, a back glass panel 20 and a battery string array 80 located between the front glass panel 10 and the back glass panel 20. The front glass panel 10 is formed by splicing multiple first glass sheets 11, and the back glass panel 20 is formed by splicing multiple second glass sheets 21. There is at least one first splicing seam 111 between the multiple first glass sheets 11, and there is at least one second splicing seam 211 between the multiple second glass sheets 21. The extension direction of the at least one first splicing seam 111 is perpendicular to the extension direction of the at least one second splicing seam 211.

[0052] It should be noted that the number of the first glass sheets 11 forming the front glass plate 10 and the number of the second glass sheets 21 forming the back glass plate 20 are determined according to the actual required photovoltaic module strength and sealing protection requirements.

[0053] For example, the number of the first glass sheets 11 is two, and the number of the second glass sheets 21 is also two. Figure 2-Figure 3 As shown, Figure 2 2 is a schematic structural diagram of a front glass 10 (two first glass sheets 11) according to an embodiment of the present invention; Figure 3 2 is a schematic structural diagram of a back glass 20 (two second glass sheets 21 ) according to an embodiment of the present invention.

[0054] For example, the front glass 10 is formed by splicing two first glass sheets 11 distributed along the second direction, and the formed first splicing seam 111 extends along the first direction; the back glass 20 is formed by splicing two second glass sheets 21 distributed along the first direction, and the formed second splicing seam 211 extends along the second direction; the first splicing seam 111 and the second splicing seam 211 are perpendicular to each other, so that this cross-type split structure can maintain sufficient strength of the photovoltaic laminate and will not break the battery string array 80.

[0055] Exemplarily, the two first glass sheets 11 have the same size and the two second glass sheets 21 have the same size, so that the second joint seam 211 on the back glass 20 is located in the middle of the first direction, which is the lead-out position of the bus bar of the battery string array 80. Therefore, the lead-out wires of the bus bar can extend from the second joint seam 211 to connect to the junction box, and there is no need to open holes in the back glass 20, thereby avoiding the occurrence of hidden cracks in the back glass 20 that may be easily caused by opening holes, reducing the breakage rate and reducing costs.

[0056] Since the back glass 20 and the front glass 10 are both formed by splicing two glass sheets, reducing the size of the glass sheets can effectively reduce the size of glass processing equipment, increase space energy utilization, and thereby improve the production yield of the back glass 20 and the front glass 10.

[0057] When the photovoltaic module is recycled and disassembled, good glass disassembly can be achieved by locally heating or soaking a piece of glass in turn, and a container and equipment that can accommodate half of the photovoltaic module are sufficient, which reduces the resource and energy consumption requirements.

[0058] In another optional embodiment, if Figure 4 and Figure 5 As shown, the front glass 10 is formed by splicing two first glass sheets 11 distributed along the first direction, and the formed first splicing seam 111 extends along the second direction; the back glass 20 is formed by splicing two second glass sheets 21 distributed along the second direction, and the formed second splicing seam 211 extends along the first direction; the first splicing seam 111 and the second splicing seam 211 are perpendicular to each other, so that this cross-type split structure can maintain sufficient photovoltaic laminate strength and will not break the battery string array 80. Among them, Figure 4is a schematic structural diagram of a front glass 10 (two first glass sheets 11) according to another embodiment of the present invention;

[0059] Figure 5 is a schematic structural diagram of a back plate glass 20 (two second glass sheets 21) according to another embodiment of the present invention;

[0060] Exemplarily, the two first glass sheets 11 have the same size and the two second glass sheets 21 have the same size, so that the second joint seam 211 on the back panel glass 20 is located in the middle in the second direction. At this time, lead-out holes 213 need to be opened at the lead-out line positions of the bus bars of the two second glass sheets 21 respectively to lead the current to the junction box.

[0061] When there are multiple first splicing seams 111 and multiple second splicing seams 211, it is possible that one of the multiple first splicing seams 111 is completely opposite to one of the multiple second splicing seams 211, resulting in insufficient support strength of the photovoltaic laminate by the back glass 20 and the front glass 10 at the position where the splicing seams are completely opposite.

[0062] For example, the front glass 10 is formed by splicing four first glass sheets 11, and the back glass 20 is formed by splicing nine second glass sheets 21. Figure 6 and Figure 7 As shown, Figure 6 2 is a schematic structural diagram of a front glass 10 (four first glass sheets 11 ) according to an embodiment of the present invention; Figure 7 2 is a schematic structural diagram of a back glass 20 (nine second glass sheets 21 ) according to an embodiment of the present invention.

[0063] When the sizes of the first glass sheets 11 and the second glass sheets 21 are the same, if the number of the second glass sheets 21 in the back glass 20 is also four, the joints formed by the front glass 10 and the back glass 20 are completely opposite, which is not conducive to the overall strength of the photovoltaic laminate. Therefore, the number of the second glass sheets 21 is set to nine, which is different from the four first glass sheets 11 of the front glass 10.

[0064] In some embodiments, in the photovoltaic laminate of the exemplary embodiment of the present invention, in the first joint seam 111 and the second joint seam 211 extending in the same direction, the orthographic projection of the first joint seam 111 on the back glass 20 does not overlap with the second joint seam 211 .

[0065] like Figure 6 As shown, a first joint seam 111 extending along a first direction and a first joint seam 111 extending along a second direction are formed on the front glass 10. Figure 7As shown, two second joint seams 211 extending along the first direction and two second joint seams 211 extending along the second direction are formed on the back plate glass 20. Figure 6 and Figure 7 As shown, the orthographic projection of the first splicing seam 111 extending in the first direction on the back glass 20 is located between the two second splicing seams 211 extending in the first direction, and does not overlap with them, but there is a certain distance; at the same time, the orthographic projection of the first splicing seam 111 extending in the second direction on the back glass 20 is located between the two second splicing seams 211 extending in the second direction, and does not overlap with them, but there is a certain distance. As a result, the crossed first splicing seams 111 on the front glass 10 and the crossed second splicing seams 211 on the back glass 20 are interlaced with each other, thereby avoiding the problem that the first splicing seams 111 and the second splicing seams 211 completely overlap, causing the overall structural strength of the photovoltaic laminate to decrease.

[0066] When the back glass 20 is formed by splicing nine second glass sheets 21 and there is no suitable second splicing seam 211 corresponding to the position of the bus bar lead-out line of the battery string array 80, it is necessary to open a lead-out hole 213 on each corresponding second glass sheet 21 to lead the current to the junction box.

[0067] Considering that the first joint seam 111 is formed on the front glass 10 , that is, on the light-receiving surface of the photovoltaic laminate, it may affect the utilization of light by the cells in the cell string array 80 .

[0068] Figure 1 Schematic diagram of the structure of a photovoltaic cell string array according to an embodiment of the present invention. Figure 1 and Fig. 9 As shown, there are a plurality of gaps 81 between the battery strings in the battery string array 80 , or there are a plurality of gaps 81 between the battery cells in the battery string.

[0069] In the photovoltaic laminate according to the exemplary embodiment of the present invention, the first splicing seam 111 is suitable for being disposed above the gaps 81 of the battery string array 80 , that is, the first splicing seam 111 is opposite to the corresponding gaps 81 .

[0070] For example, the width of the first joint 111 is consistent with the width of the corresponding gap 81 to reduce the weakening of light by the first joint 111, so that the battery string array can make full use of light and improve the photoelectric conversion efficiency. The width of the first joint 111 is the distance between the two first glass sheets 11, and the width of the first joint 111 can be 1.5 mm to 2 mm.

[0071] In some embodiments, the width of the second joint seam 211 is greater than or equal to the width of the gap 81. The width of the second joint seam 211 may be 2 mm to 7 mm, for example, 3 mm, 4 mm, 5 mm, 6 mm, etc. When the second joint seam 211 is located at the bus bar lead-out position of the battery string array 80, the width of the second joint seam 211 may be sufficient to lead out the bus bar, thereby avoiding the problem of easy breakage caused by opening a hole in the second glass sheet 21.

[0072] In some embodiments, the first glass sheet 11 is provided with a first chamfer 112 on its edge and / or corner; the second glass sheet 21 is provided with a second chamfer 212 on its edge and / or corner.

[0073] Since the front glass plate 10 is formed by splicing the first glass sheets 11, the shape of the first glass sheet 11 is rectangular, and similarly, the shape of the second glass sheet 21 is also rectangular. The two rectangular first glass sheets 11 may be squeezed and broken at the first splicing seam 111 due to thermal expansion and contraction. Therefore, by performing a polishing arc treatment on the edge of the first glass sheet 11, that is, forming a rectangular or arc-shaped first chamfer 112, and also setting the first chamfer 112 at the corner position, on the one hand, mutual squeezing and breaking can be prevented, and on the other hand, the edge can be prevented from being too sharp and easily damaged. At the same time, by setting the first chamfer 112 at the edge and corner to leave a certain gap, it is also convenient to use tools to apply force at the gap position during the disassembly process, making the disassembly easier.

[0074] For the same reason as the first glass sheet 11 is provided with the first chamfer 112 , the edge and / or corner of the second glass sheet 21 is also provided with a second chamfer 212 , which will not be described in detail herein.

[0075] Considering the reliability of the photovoltaic module during outdoor use, the photovoltaic laminate of the exemplary embodiment of the present invention uses an insulating material for sealing and bonding in the first joint seam 111 and the second joint seam 211 .

[0076] like Fig. 9 As shown, the photovoltaic laminate further includes at least one first insulating strip 51 , which is embedded in the first joint seam 111 ; the photovoltaic laminate further includes at least one second insulating strip 52 , which is embedded in the second joint seam 211 .

[0077] A first insulating strip 51 is embedded in each first joint 111, and a second insulating strip 52 is embedded in each second joint 211 to prevent water vapor from intruding. The first insulating strip 51 and the second insulating strip 52 are both made of highly water-resistant insulating materials, such as butyl rubber, epoxy resin, polyimide, silicone rubber, polytetrafluoroethylene, etc. The above materials have good electrical insulation and water-proof properties, good air tightness, and good aging resistance.

[0078] Exemplarily, the cross-sectional shape of the first insulating strip 51 and the second insulating strip 52 can be conical, triangular, rectangular, etc. The thickness of the first insulating strip 51 or the second insulating strip 52 is greater than the thickness of the front glass 10. For example, it can be 2 mm to 3 mm higher than the thickness of the first glass sheet 11 or the second glass sheet 21. The thickness and cross-sectional shape of the above-mentioned insulating strips can fully fill the corresponding joints in the subsequent lamination process of the photovoltaic laminate. For example, the large end of the conical cross-section is exposed outside the joint. During lamination, under certain pressure and temperature conditions, the insulating strip will be completely embedded in the corresponding joint. The pre-tightening force makes the insulating strip reach a completely sealed state, thereby maintaining the good bonding, water-blocking and sealing properties of the photovoltaic laminate.

[0079] In some embodiments, Fig. 9 As shown, the photovoltaic laminate also includes at least one first shading strip 61, which is covered on the first insulating strip 51 and located on the side of the first insulating strip 51 away from the battery string array 80; the photovoltaic laminate also includes at least one second shading strip 62, which is covered on the second insulating strip 52 and located on the side of the second insulating strip 52 away from the battery string array 80.

[0080] The first shading strip 61 is provided on the light-receiving surface of the first glass sheet 11 of the front glass 10, and covers the first insulating strip 51, so as to minimize the risk of aging failure of the first insulating strip 51 due to light exposure. For example, the first shading strip 61 is fixed to the first glass sheet 11 by bonding. Exemplarily, the second shading strip 62 is provided on the back side of the second glass sheet 21 of the back glass 20, so as to minimize the risk of aging failure of the second insulating strip 52 due to light exposure.

[0081] For example, the material of the first shading strip 61 and the second shading strip 62 can be polymethyl methacrylate (PMMA), polycarbonate (PC), etc., which can have a shading effect by adding carbon black or other coloring. The above PMMA and PC materials have good optical properties and weather resistance, and can play a role in delaying the aging of the corresponding insulating strips. In addition, the first shading strip 61 and the second shading strip 62 also have the effect of water vapor sealing the corresponding joint seams.

[0082] Continue as Fig. 9As shown, the photovoltaic laminate of an exemplary embodiment of the present invention also includes at least one first insulating pad 71, which is covered on the first insulating strip 51 and located on the side of the first insulating strip 51 facing the battery string array 80; the photovoltaic laminate also includes at least one second insulating pad 72, which is covered on the second insulating strip 52 and located on the side of the second insulating strip 52 facing the battery string array 80.

[0083] For example, the first insulating pad 71 and the second insulating pad 72 may be made of a series of insulating, weather-resistant and flexible materials such as thermoplastic polyester (TPT), thermoplastic elastomer (TPE), polyethylene terephthalate (PET), etc. For example, a very thin layer of ethylene-vinyl acetate copolymer (EVA) adhesive film or polyolefin elastomer (POE) adhesive film is coated on the first insulating pad 71 made of PET material, so as to adhere it to the first insulating strip 51 and the first glass sheet 11 facing the battery string array 80.

[0084] Exemplarily, the first insulating gasket strip 71 and the second insulating gasket strip 72 may be one or more of PET film, PET / EVA composite film, EVA / PET / EVA composite film, PET / POE composite film or POE / PET / POE composite film.

[0085] Since there is a second joint 211 between the second glass sheets 21 that are spliced ​​together, and the bus bar of the battery string array 80 is located below the second joint 211, this will cause a reduction in the creepage distance. Therefore, setting a second insulating gasket 72 between the second insulating strip 52 and the battery string array 80 for isolation can effectively reduce the impact of the above defects. Setting a first insulating gasket 71 between the first insulating strip 51 and the battery string array 80 can also reduce the impact of the shortened creepage distance. In addition, the first insulating gasket 71 and the second insulating gasket 72 also have the effect of vapor sealing the corresponding joints.

[0086] Figure 8 Schematic diagram of the structure of the back glass (with support strips) according to an embodiment of the present invention. Figure 8 and Fig. 9As shown, the photovoltaic laminate of the exemplary embodiment of the present invention also includes at least one support bar 30, which is covered on the second splicing seam 211, and two partial parts of the support bar 30 are respectively attached to the two second glass sheets 21 forming the second splicing seam 211, and are located on the side away from the battery string array 80.

[0087] Exemplarily, the support strip 30 can be a glass strip, and the number of the support strips 30 can fully meet the requirement of covering each second joint seam 211. It can be adhered to the back panel glass 20 through EVA adhesive film and cover the second insulating strip 52 and the first insulating pad strip 71, that is, the support strip 30 can play the role of connecting the two second glass sheets 21.

[0088] When the back panel glass 20 is formed by splicing multiple second glass sheets 21, the multiple second splicing seams 211 formed may reduce the overall supporting strength of the back panel glass 20. By arranging support strips 30 on each second splicing seam 211, and the parts on both sides of the support strips 30 are respectively bonded to the two second glass sheets 21 forming the second splicing seam 211, it is ensured that the splicing positions of the two second glass sheets 21 have a certain rigidity, thereby ensuring the overall strength of the photovoltaic laminate.

[0089] As can be seen from the above, in the photovoltaic laminate of the exemplary embodiment of the present invention, the front glass and the back glass adopt a split structure, which can save resources and reduce energy consumption in the recycling process of scrapped photovoltaic modules. After the size of the front glass and the back glass is reduced, the recycling device can be reduced synchronously to optimize the equipment. The size of the front glass and the back glass is reduced, the processing process is more convenient, and the efficiency is improved.

[0090] An exemplary embodiment of the present invention further provides a photovoltaic module, comprising the photovoltaic laminate according to the above embodiment.

[0091] After the photovoltaic laminate is laminated, a protective shell is also required to be wrapped around the edge of the photovoltaic laminate to provide mechanical support and protection. The protective shell is a frame or assembly frame, and the photovoltaic laminate with the frame or assembly frame installed forms a photovoltaic module.

[0092] The technical advantages of the above photovoltaic module over the prior art are the same as the advantages of the above photovoltaic laminate, which will not be elaborated here.

[0093] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A photovoltaic laminate, characterized in that: It comprises a front glass plate, a back glass plate and a battery string array located between the front glass plate and the back glass plate, wherein the front glass plate is formed by splicing a plurality of first glass plates, and the back glass plate is formed by splicing a plurality of second glass plates; There is at least one first joint seam between the plurality of the first glass sheets, and there is at least one second joint seam between the plurality of the second glass sheets; An extension direction of at least one of the first joint seams is perpendicular to an extension direction of at least one of the second joint seams.

2. The photovoltaic laminate according to claim 1, characterized in that In the first stitching seam and the second stitching seam extending in the same direction, the orthographic projection of the first stitching seam on the back panel glass does not overlap with the second stitching seam.

3. The photovoltaic laminate according to claim 1, characterized in that The battery string array has a plurality of gaps, and each of the first joint seams is opposite to a corresponding gap, wherein the gaps include gaps between battery strings or gaps between battery sheets.

4. The photovoltaic laminate according to claim 3, characterized in that The width of the first joint seam is consistent with the width of the corresponding gap.

5. The photovoltaic laminate according to claim 3, characterized in that The width of the second joint seam is greater than or equal to the width of the gap.

6. The photovoltaic laminate according to claim 1, characterized in that The edge and / or corner of the first glass sheet is provided with a first chamfer; and / or, The edge and / or corner of the second glass sheet is provided with a second chamfer.

7. The photovoltaic laminate according to any one of claims 1 to 6, characterized in that The photovoltaic laminate further comprises at least one first insulating strip, wherein the first insulating strip is embedded in the first joint; and / or, The photovoltaic laminate further comprises at least one second insulating strip, wherein the second insulating strip is embedded in the second joint seam.

8. The photovoltaic laminate according to claim 7, characterized in that The photovoltaic laminate further comprises at least one first shading strip, wherein the first shading strip is covered on the first insulating strip and is located on a side of the first insulating strip away from the battery string array; and / or, The photovoltaic laminate further includes at least one second shading strip, which is covered on the second insulating strip and located on a side of the second insulating strip away from the battery string array.

9. The photovoltaic laminate according to claim 7, characterized in that The photovoltaic laminate further comprises at least one first insulating gasket, which is covered on the first insulating strip and is located on a side of the first insulating strip facing the battery string array; and / or, The photovoltaic laminate further includes at least one second insulating strip, which is covered on the second insulating strip and located on a side of the second insulating strip facing the battery string array.

10. A photovoltaic module, characterized in that: The photovoltaic laminate comprises the photovoltaic laminate according to any one of claims 1 to 9.

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