CN223080432U - A heterojunction photovoltaic module with improved output power - Google Patents
A heterojunction photovoltaic module with improved output power Download PDFInfo
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- CN223080432U CN223080432U CN202421455330.5U CN202421455330U CN223080432U CN 223080432 U CN223080432 U CN 223080432U CN 202421455330 U CN202421455330 U CN 202421455330U CN 223080432 U CN223080432 U CN 223080432U
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- output power
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Abstract
The utility model relates to the technical field of photovoltaic devices and provides a heterojunction photovoltaic module for improving output power, which comprises a battery panel, wherein the battery panel comprises front tempered glass, a light conversion film EPE, a plurality of heterojunction half-cell strings, ultraviolet-resistant EPE and back tempered glass which are sequentially laminated, and a reflecting film is attached to the back tempered glass at a gap position between each two corresponding cells of the heterojunction half-cell strings. The utility model optimizes the utilization of the gaps between the packaging adhesive film and the battery piece, the packaging adhesive film adopts the light conversion film EPE, and the light reflection film on the toughened glass on the back is a functional film capable of changing the light reflection direction, so that the light of the gaps between the battery piece is reflected to the surface of the battery piece, the light utilization rate is improved, and the power of the assembly is increased.
Description
Technical Field
The utility model relates to the technical field of photovoltaic devices, in particular to a heterojunction photovoltaic module for improving output power.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Solar cells can convert light energy into electrical energy, but the cells cannot be used directly, so that the cells are packaged, the environmental tolerance of the cells is guaranteed, and the cells have certain mechanical properties, and the packaged devices are called photovoltaic modules.
The inventor finds that at present, a heterojunction photovoltaic module is generally packaged by using two packaging adhesive films of common EVA (namely ethylene-vinyl acetate copolymer) and POE (namely ethylene-octene copolymer), and glass is generally selected from glazed glass or transparent glass, so that the material matched packaging heterojunction cell module cannot fully exert the weak light power generation characteristic and high conversion efficiency characteristic of a heterojunction cell, and the output power of the heterojunction photovoltaic module is low.
Disclosure of utility model
In order to solve the problems, the utility model provides a heterojunction photovoltaic module for improving output power, which optimizes the gap utilization of a packaging adhesive film and a battery piece, and improves the power of the heterojunction photovoltaic module by adopting a light conversion film EPE and a gap film.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
one or more embodiments provide a heterojunction photovoltaic module for improving output power, including a battery panel, wherein the battery panel includes front tempered glass, an optical conversion film EPE, a plurality of heterojunction half-cell strings, an anti-ultraviolet EPE and back tempered glass which are sequentially laminated;
And a reflective film is attached to the back toughened glass at a gap position between the battery pieces corresponding to the heterojunction half-piece battery string.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model optimizes the utilization of the gaps between the packaging adhesive film and the battery piece, the packaging adhesive film adopts the light conversion film EPE, and the light reflection film on the toughened glass on the back is a functional film capable of changing the light reflection direction, so that the light of the gaps between the battery piece is reflected to the surface of the battery piece, the light utilization rate is improved, and the power of the assembly is increased.
The advantages of the present utility model, as well as those of additional aspects, will be described in detail in the following detailed examples.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic view of a cell panel structure of a photovoltaic module of the present utility model;
FIG. 2 is a schematic view of the light reflection of the gap reflector of the battery sheet of the present utility model;
FIG. 3 is a schematic view of the front structure of the photovoltaic module of the present utility model;
FIG. 4 is a schematic view of the back side structure of the photovoltaic module of the present utility model;
Wherein: 1, front toughened glass, 2, light conversion film EPE,3, a plurality of heterojunction half-cell strings, 4, anti-ultraviolet EPE,5, back toughened glass, 6, gaps, 7, reflective films, 8, grounding holes, 9, drain holes, 10 and mounting holes; 3-1, battery piece.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In the technical scheme disclosed in one or more embodiments, as shown in fig. 1 to 4, a heterojunction photovoltaic module for improving output power comprises a battery panel, wherein the battery panel comprises front tempered glass 1, a light conversion film EPE2, a plurality of heterojunction half-cell strings 3, an ultraviolet-resistant EPE4 and back tempered glass 5 which are sequentially laminated;
On the back toughened glass 5, a reflective film 7 is attached at the position corresponding to the gap 6 between the battery pieces 3-1 of the heterojunction half-piece battery string 3.
In this embodiment, the use of the packaging adhesive film and the battery piece gap is optimized, the light conversion film EPE2 is adopted for the packaging adhesive film, and the reflective film on the back toughened glass 5 is a functional film capable of changing the light reflection direction, so that the light of the battery piece gap is reflected to the surface of the battery piece, the light utilization rate is improved, and the power of the assembly is increased.
Optionally, the front surface of the front tempered glass 1 is coated with a silicon nitride film to increase the light transmittance of the glass.
According to the technical scheme, the light conversion film EPE is a polyethylene film, and can convert sunlight spectrum into a film which is more suitable for absorption of a photovoltaic cell. The light conversion film EPE has the main functions of improving the power generation efficiency of the photovoltaic cell, reducing the cost and increasing the power generation capacity of the photovoltaic power station.
EPE (Expandable Polyethylene) is polyethylene, also known as pearl wool.
The light conversion film EPE, in particular to the EPE, is added with an ultraviolet absorber (uv absorber) and light conversion powder, and can convert ultraviolet light into light which can be directly absorbed by a photovoltaic cell.
The anti-ultraviolet EPE, in particular to the EPE which is added with an ultraviolet absorber (uv absorber), has a strong blocking effect on ultraviolet rays.
In some embodiments, the cell 3-1 used in the heterojunction half-cell string 3 is a heterojunction half-cell double-sided cell, and the cell size has various sizes, such as 182mm x 105mm, 210mm x 105mm, 182mm x 91mm.
Alternatively, the positive and negative electrodes of the heterojunction half-cell string 3 are connected in series, specifically, by a low-temperature solder strip.
The photovoltaic solder strip is a material formed by coating a layer of tin-based solder with uniform thickness on the surface of a copper strip with a certain size.
The photovoltaic welding strip comprises a normal temperature welding strip and a low temperature welding strip, wherein the low temperature welding strip is made of alloy materials with melting point temperature lower than 450 ℃ on the basis of the normal temperature welding strip, generally comprises metals such as aluminum, copper, nickel, zinc and the like, and is added with a certain proportion of welding auxiliary agents such as an active agent, a rheological agent, a thickening agent and the like. These components can melt rapidly at low temperatures and bond with the substrate being welded to form a strong weld joint.
According to a further technical scheme, a junction box is arranged on the back of the battery panel;
The three-split junction box comprises a left junction box, a middle junction box and a right junction box, wherein the left junction box, the middle junction box and the right junction box all comprise a box body, a box cover and modularized photovoltaic elements arranged in the corresponding box bodies;
Optionally, the junction box is adhered to the back of the battery panel through silica gel;
According to a further technical scheme, an aluminum frame is arranged at the peripheral edge of the battery panel, and the aluminum frame is adhered to the peripheral edge of the battery panel through silica gel and is used for packaging and protecting the battery panel;
further, the aluminum frame is provided with a grounding hole 8, a drain hole 9 or/and a mounting hole 10;
specifically, the aluminum frame leads out a grounding wire through the grounding hole 8;
Optionally, on the aluminum frame, the drain holes 9 may be uniformly arranged on the aluminum frame at a set interval;
Specifically, the mounting hole 10 is used for realizing connection between the photovoltaic module and the photovoltaic fixing support, and the position of the mounting hole 10 can be determined according to the specific structure of the support, and in this embodiment, the mounting hole 10 can be arranged at four corner positions of the photovoltaic module.
In this embodiment, the front and back surfaces of the tempered glass are the front surface on the surface facing the light, and the back surface on the surface facing the light.
The photovoltaic module mounting method comprises sequentially laminating back tempered glass 5 adhered with a reflective film, anti-ultraviolet EPE 4, heterojunction half-cell strings 3, light conversion film EPE 2 and front coated tempered glass 1 from bottom to top;
The positive and negative poles of the heterojunction half-cell string 3 are connected in series through a low-temperature welding strip, a certain amount of silica gel is injected on an aluminum frame, the aluminum frame is assembled on a cell panel, and then a junction box 6 is adhered to the back of the back toughened glass 5 adhered with the reflective film through the silica gel.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421455330.5U CN223080432U (en) | 2024-06-24 | 2024-06-24 | A heterojunction photovoltaic module with improved output power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421455330.5U CN223080432U (en) | 2024-06-24 | 2024-06-24 | A heterojunction photovoltaic module with improved output power |
Publications (1)
| Publication Number | Publication Date |
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| CN223080432U true CN223080432U (en) | 2025-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202421455330.5U Active CN223080432U (en) | 2024-06-24 | 2024-06-24 | A heterojunction photovoltaic module with improved output power |
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| CN (1) | CN223080432U (en) |
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- 2024-06-24 CN CN202421455330.5U patent/CN223080432U/en active Active
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Effective date of registration: 20260104 Address after: 010078 Inner Mongolia Autonomous Region Hohhot City Economic and Technological Development Zone Management Committee Sharqin Office Area A5-3019 Room Patentee after: Hohhot Future Energy Co.,Ltd. Country or region after: China Address before: 067000 Hebei Province Chengde City Development Zone High-tech Industrial Park Main Building of Science and Technology Tower 5th Floor 0537 Patentee before: Hebei Future Double Carbon Energy Co.,Ltd. Country or region before: China |