CN112071936A - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
- Publication number
- CN112071936A CN112071936A CN202010806678.4A CN202010806678A CN112071936A CN 112071936 A CN112071936 A CN 112071936A CN 202010806678 A CN202010806678 A CN 202010806678A CN 112071936 A CN112071936 A CN 112071936A
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- Prior art keywords
- layer
- photovoltaic module
- battery
- back plate
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011521 glass Substances 0.000 claims abstract description 18
- 230000001678 irradiating effect Effects 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 21
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 18
- 229910052731 fluorine Inorganic materials 0.000 claims description 18
- 239000011737 fluorine Substances 0.000 claims description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000002313 adhesive film Substances 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 10
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 6
- 239000010985 leather Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 11
- 230000001070 adhesive effect Effects 0.000 abstract description 11
- 239000002390 adhesive tape Substances 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 235000010215 titanium dioxide Nutrition 0.000 description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229920001634 Copolyester Polymers 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010336 energy treatment Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
The invention discloses a photovoltaic module, and relates to the technical field of photovoltaics. The solar cell comprises a back plate, a glass plate covered on the back plate and a cell string array positioned between the back plate and the glass plate and composed of a plurality of cell strings, wherein first adhesive strips are attached to the periphery of the back plate around the cell string array and used for reflecting light rays irradiating the periphery of the cell string array. According to the photovoltaic module provided by the invention, the first adhesive tape is used for reflecting light rays irradiating the periphery of the battery string to the glass plate and then reflecting the light rays to the battery piece of the battery string, so that the purposes of fully utilizing the light energy in the gap and the periphery of the battery piece and improving the conversion efficiency of the battery are achieved.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a photovoltaic module.
Background
As shown in fig. 1, a conventional photovoltaic module has a structure including a back plate 1, a packaging adhesive film 2, a battery piece 3, a packaging adhesive film 2, and a glass plate 4 in sequence from a back side to a front side. The gaps of lmm-4mm are formed between the cell plates and between the cell strings, the gaps have larger gaps from the periphery of the cell strings to the outer edge of the photovoltaic module, the gaps occupy 2-10% of the area of the photovoltaic module, and light energy irradiated to the gaps is difficult to directly absorb or utilize. At present, the photovoltaic industry adopts a reflective back plate to replace a back plate or paste second adhesive strips among the cells so as to utilize the light energy in the gaps and improve the utilization rate of the light energy. But the utilization rate of light is low, and the efficiency of the assembly is low.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a photovoltaic module, which is used for fully utilizing the light energy in the gaps and the periphery of the cells and improving the conversion efficiency of the cells.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a photovoltaic module comprises a back plate, a glass plate covered on the back plate and a battery string array located between the back plate and the glass plate and composed of a plurality of battery strings, wherein first attachment strips are attached to the periphery of the back plate around the battery string array and used for reflecting light rays irradiating the periphery of the battery string array.
Optionally, any one of the battery strings has a plurality of battery pieces, and first strips are attached to gaps of the plurality of battery strings and gaps of the plurality of battery pieces.
Optionally, the first sticker comprises a first fluorine coating layer, a base material layer, a second fluorine coating layer and a bonding layer which are sequentially stacked from top to bottom, and the bonding layer is used for bonding the first sticker to the back plate.
Optionally, the tie coat adopts the EVA material to make, the substrate layer adopts the PET material to make, fluorine cortex adopts the fluororesin material of doping titanium white powder to make.
Optionally, the first tape is an insulating tape, the thickness of the first tape is smaller than the thickness of an encapsulation adhesive film of a cell of the photovoltaic module, and the first tape is used for replacing the encapsulation adhesive film arranged around the cell string array.
Optionally, the thickness of the first strip is in the range of 50-200 microns.
Optionally, any one of the battery strings has a plurality of battery pieces, a plurality of gaps of the battery strings and a plurality of gaps of the battery pieces are attached with a second adhesive tape, and the second adhesive tape is a reflective adhesive tape.
Optionally, the second sticker comprises a bonding layer, a substrate layer and a reflecting layer which are sequentially stacked from bottom to top, wherein the bonding layer is used for bonding the second sticker to the back plate.
Optionally, the reflective layer is a metal plating layer prepared on the substrate layer.
Optionally, the reflective layer is an aluminum plating layer.
The invention provides a photovoltaic module which comprises a back plate, a glass plate covered on the back plate and a plurality of battery strings positioned between the glass plate and the back plate, wherein first adhesive strips are attached to the back plate around the battery strings. The first adhesive strips are used for reflecting light rays irradiating the periphery of the battery string to the glass plate and then reflecting the light rays to the battery pieces of the battery string, so that the purposes of fully utilizing the light energy in the gaps and the periphery of the battery pieces and improving the conversion efficiency of the battery are achieved.
Drawings
FIG. 1 is a schematic diagram of a prior art photovoltaic module;
FIG. 2 is a schematic structural diagram of a photovoltaic module according to the present invention;
FIG. 3 is a schematic top view of the photovoltaic module shown in FIG. 2;
FIG. 4 is a schematic view of the first and second strips of a photovoltaic module according to the present invention reflecting light;
FIG. 5 is a schematic structural view of a first strip of a photovoltaic module according to FIG. 2;
fig. 6 is a schematic structural view of a second strip of the photovoltaic module shown in fig. 2.
Detailed Description
The inventors of the present invention found that: in the conventional photovoltaic module, the cell plates 31 have a gap space of l-4mm between the plates 100 and the strings 200, and a larger gap space is formed between the periphery 300 of the cell string array and the outer edge of the photovoltaic module, the gaps occupy 2-10% of the area of the photovoltaic module, and the light energy irradiated to the gaps is difficult to be directly absorbed or utilized. At present, those skilled in the art only find that the inter-cell 100 and inter-string 200 of the cell 31 need to use a reflective film to increase the light energy utilization of the gap space of the cell 31 and improve the light energy utilization and the cell efficiency. However, it has not been found that there is a large gap space around 300 of the battery string array, and the light energy around 300 of the battery string array cannot be fully utilized. Based on this, the inventor proposes a technical solution of the present invention, in which the first strips 4 are added to the periphery 300 of the battery string array to reflect the light irradiated to the periphery 300 of the battery string array to the glass plate 2 and then to the battery plates 31 of the battery strings 3, so as to achieve the purpose of fully utilizing the light energy at the battery plate gaps and the periphery 300 and improving the conversion efficiency of the battery.
As shown in fig. 2 and 3, the photovoltaic module provided by the present invention may generally include a back sheet 1, a glass sheet 2 covering the back sheet 1, and a cell string array disposed therebetween. The battery string array includes a plurality of battery strings 3 distributed side by side. A plurality of battery strings 3 are distributed side by side to form a battery string array. Any one of the battery strings 3 has a plurality of battery pieces 31. Generally, when the battery string 3 or the battery piece 31 is sealed between the back sheet 1 and the glass sheet 2, both sides (back surface and glass surface) of the battery string 3 or the battery piece 31 are sealed with the sealant film 5. A first strip of tape 4 is applied to the backsheet 1 around 300 of the array of strings (i.e. around the array of strings 3 to the outer edge of the photovoltaic module). As shown in fig. 4, the line with an arrow in fig. 4 is a reflection indication of light, and by the arrangement of the first sticker 4, when the light irradiates the periphery 300 of the battery string array, the light is reflected to the glass plate 2 via the first sticker 4 and then reflected to the battery piece 31 of the battery string 3, so that the purpose of fully utilizing the light energy at the gap between the battery pieces and the periphery 300 and improving the conversion efficiency of the battery is achieved.
Specifically, as shown in fig. 5, the first sticker 4 includes a first fluorine coating layer 41, a substrate layer 42, a second fluorine coating layer 43, and a bonding layer 44, which are sequentially stacked from top to bottom. The adhesive layer 44 is used to adhere the first strip of tape 4 to the backing sheet 1. The adhesive layer 44 is made of an adhesive, and typically, the adhesive layer 44 is made of an EVA material (i.e., an ethylene-vinyl acetate copolymer material). The first strip 4 is of a CPC structure. The CPC structure can ensure the light reflecting property of the first furring strip 4 and has good weather resistance. C is fluororesin material doped with titanium dioxide (titanium dioxide), and P is PET material (namely polyethylene terephthalate material). That is, the substrate layer 42 is made of PET material, and the first fluorine coating layer 41 and the second fluorine coating layer 43 are made of fluorine resin material doped with titanium dioxide (titanium dioxide). The first fluorine coating film layer 41 and the second fluorine coating film layer 43 have a reflectivity of up to 90% and are capable of blocking ultraviolet rays. The adhesive tape material of the first adhesive tape 4 adopted by the invention has high reliability and high reflectivity, is attached to the gaps and the periphery of the serial pieces of the assembly, and achieves the effect of improving the light utilization rate of the gap area of the assembly by reflecting the light in the gaps of the assembly to the glass and then reflecting the light to the battery piece.
And the upper surface and the lower surface of the battery string array are provided with packaging adhesive films 5. In an alternative embodiment, the periphery 300 of the battery string array is encapsulated by the first strip of tape 4. The first strip of tape 4 may be used to replace the packaging adhesive film 5 disposed around 300 the array of battery strings. The thickness of the first strip 4 is smaller than that of the packaging adhesive film 5 of the cell 31 of the photovoltaic module. Therefore, when the battery piece 31 of the photovoltaic component is packaged, only the battery string array part needs to be packaged by an adhesive film, the first adhesive strip 4 is directly pasted at the 300 position around the battery string array, and the first adhesive strip 4 is guaranteed to have good insulativity due to the fact that the CPC structure of the fluorine resin material doped with titanium dioxide (titanium dioxide) and the PET material is adopted by the first adhesive strip 4, and can be used for replacing the packaging adhesive film 5 at the 300 position around the battery string array. In this embodiment, the first strip 4 is used to replace the packaging adhesive film 5 around 300 portions, so that the photovoltaic module has the advantage of avoiding risks such as component hidden cracks and fragments. Optionally, the thickness of the first strip of tape 4 is in the range of 50-200 microns. The first strip 4 has insulating properties and does not adversely affect the assembly.
As shown in fig. 3, a certain gap space exists between the adjacent two battery plates 31 in the same battery string 3, and between the adjacent battery strings 3, 200. Optionally, a first strip of tape 4 or a second strip of tape 6 is attached to the back panel 1 in the interstitial spaces between the tiles 100 and the strings 200.
As shown in fig. 6, the second strip 6 is a retroreflective strip with a reflective layer. Generally, the second tape 6 includes an adhesive layer 61, a base layer 62, and a reflective layer 63 stacked in this order from the bottom up. The adhesive layer 61 is used to adhere the second strip 6 to the backing sheet 1. The reflective layer 63 is a metal plating layer prepared on the base material layer 62. Optionally, the adhesive layer 61 is formed by laminating an adhesive on the back surface of the substrate layer 62 and performing a catalytic treatment to thermally attach the second strip 6 to the back sheet 1 at the gap between the battery pieces 31. The reflective layer 63 is formed by plating aluminum onto the base material layer 62 by vacuum sputtering or evaporation. The catalytic treatment includes one or more of ozone, UV light, gamma rays, and ionization, and the viscosity and surface tackiness of the adhesive are changed by high energy treatment to form the adhesive layer 61. The adhesive comprises one or more of polyurethane TPU, EVA, copolyamide Co-PA and copolyester Co-PES.
The second furring strip 6 is high in cost due to the fact that vacuum sputtering or evaporation of the reflecting layer 63 is needed, when the first furring strip 4 is adopted, only the first fluorine leather film layer 41 and the second fluorine leather film layer 43 are needed to be laminated on the base material layer 42 made of the PET material, and therefore the cost is lower, and the CPC structure of the first furring strip 4 enables the photovoltaic module to have high reliability, good light reflecting characteristic and weather resistance.
According to the photovoltaic module provided by the invention, during production, the first sticker 4 is attached to the back plate/back glass through the sticker device in the manufacturing process of the photovoltaic module. In practical application, when the photovoltaic module is manufactured, the strip pasting equipment is added into the existing assembly line, and strip pasting is completed through the strip pasting equipment; the position of the strip can be adjusted according to the module type, and the strip completely covers the module string pieces and the gaps around the module string pieces, so that the effect of improving the power of the module is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The photovoltaic module is characterized by comprising a back plate, a glass plate covered on the back plate and a battery string array positioned between the back plate and the glass plate and composed of a plurality of battery strings, wherein first attachment strips are attached to the periphery of the back plate surrounding the battery string array and used for reflecting light rays irradiating the periphery of the battery string array.
2. The assembly according to claim 1, wherein any one of the strings has a plurality of cells, and a first strip is attached to a gap between the plurality of strings and a gap between the plurality of cells.
3. The photovoltaic module according to claim 1 or 2, wherein the first sticker comprises a first fluorine leather film layer, a substrate layer, a second fluorine leather film layer and a bonding layer which are sequentially stacked from top to bottom, and the bonding layer is used for bonding the first sticker to the back plate.
4. The photovoltaic module according to claim 3, wherein the adhesive layer is made of EVA material, the substrate layer is made of PET material, and the first fluorine coating layer and the second fluorine coating layer are made of fluorine resin material doped with titanium dioxide.
5. The photovoltaic module according to claim 3, wherein the first tape is an insulating tape, and the thickness of the first tape is smaller than the thickness of an encapsulation adhesive film of a cell of the photovoltaic module; and the upper surface and the lower surface of the battery string array are provided with packaging adhesive films, and the periphery of the battery string array is packaged by the first sticking strips.
6. The photovoltaic module of claim 5, wherein the first strip has a thickness in the range of 50-200 microns.
7. The photovoltaic module according to claim 1, wherein any one of the cell strings has a plurality of cells, and second strips are attached to gaps of the plurality of cell strings and gaps of the plurality of cells; the second sticker is a reflective sticker.
8. The photovoltaic module according to claim 7, wherein the second strip comprises a bonding layer, a substrate layer and a reflecting layer which are sequentially stacked from bottom to top, and the bonding layer is used for bonding the second strip to the back plate.
9. The photovoltaic module of claim 8, wherein the reflective layer is a metal plating layer prepared on the substrate layer.
10. The photovoltaic module of claim 9 wherein the reflective layer is an aluminum plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806678.4A CN112071936A (en) | 2020-08-12 | 2020-08-12 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010806678.4A CN112071936A (en) | 2020-08-12 | 2020-08-12 | Photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112071936A true CN112071936A (en) | 2020-12-11 |
Family
ID=73662665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010806678.4A Pending CN112071936A (en) | 2020-08-12 | 2020-08-12 | Photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112071936A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582175A (en) * | 2011-09-30 | 2012-07-18 | 长兴化学工业股份有限公司 | Encapsulating material for solar cell module and use thereof |
| US20140137926A1 (en) * | 2012-06-04 | 2014-05-22 | Lg Chem Ltd. | Multilayer film and photovoltaic module |
| CN207183291U (en) * | 2017-09-01 | 2018-04-03 | 上海海优威新材料股份有限公司 | Two-side transparent photovoltaic module structure with reflection bar |
| CN108735847A (en) * | 2018-08-01 | 2018-11-02 | 珠海格力电器股份有限公司 | The composite package glued membrane and photovoltaic module of photovoltaic module |
| CN110071187A (en) * | 2019-04-03 | 2019-07-30 | 常州百佳年代薄膜科技股份有限公司 | Photovoltaic module and its working method and preparation method, the reflective pad pasting in gap |
-
2020
- 2020-08-12 CN CN202010806678.4A patent/CN112071936A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582175A (en) * | 2011-09-30 | 2012-07-18 | 长兴化学工业股份有限公司 | Encapsulating material for solar cell module and use thereof |
| US20140137926A1 (en) * | 2012-06-04 | 2014-05-22 | Lg Chem Ltd. | Multilayer film and photovoltaic module |
| CN207183291U (en) * | 2017-09-01 | 2018-04-03 | 上海海优威新材料股份有限公司 | Two-side transparent photovoltaic module structure with reflection bar |
| CN108735847A (en) * | 2018-08-01 | 2018-11-02 | 珠海格力电器股份有限公司 | The composite package glued membrane and photovoltaic module of photovoltaic module |
| CN110071187A (en) * | 2019-04-03 | 2019-07-30 | 常州百佳年代薄膜科技股份有限公司 | Photovoltaic module and its working method and preparation method, the reflective pad pasting in gap |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |
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| RJ01 | Rejection of invention patent application after publication |