CN102280512A - Solar cell module with high conversion efficiency - Google Patents
Solar cell module with high conversion efficiency Download PDFInfo
- Publication number
- CN102280512A CN102280512A CN2010101987686A CN201010198768A CN102280512A CN 102280512 A CN102280512 A CN 102280512A CN 2010101987686 A CN2010101987686 A CN 2010101987686A CN 201010198768 A CN201010198768 A CN 201010198768A CN 102280512 A CN102280512 A CN 102280512A
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- solar module
- eva layer
- solar cell
- solar
- layer
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- 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
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Abstract
The invention discloses a solar cell module with high conversion efficiency, and belongs to the technical field of solar materials and devices. The solar cell module comprises ultrawhite ferro toughened glass, a first ethylene vinyl acetate (EVA) layer, solar cell pieces connected in series, a first EVA layer, a third EVA layer and a back plate which are encapsulated sequentially from top to down, wherein a reflective layer is arranged between the second EVA layer and the third EVA layer; V-shaped grooves which are arranged regularly are formed on the surface of the reflective layer, so that the module has high reflectivity; and an inner included angle of each V-shaped groove ranges from 120 to 138 degrees, so that when light rays reflected by two surfaces of each V-shaped groove reach the surface of the glass, incident angles of the light rays are greater than a critical angle, and the light rays are absorbed by the cell pieces due to total reflection and cannot be refracted to the air to avoid loss.
Description
Technical field
The present invention relates to solar module, relate in particular to a kind of solar module with higher conversion efficiency.Belong to solar energy materials and device technology field.
Background technology
Solar energy has received increasing concern as a kind of renewable new forms of energy of cleaning, and it is used also more and more widely, and most important applications of solar energy is exactly a photovoltaic generation at present.The elementary cell of solar energy power generating is a solar cell, in concrete application, normally a plurality of solar battery sheets is constituted solar modules, and then each solar module is coupled together integrant electric current output.
Present widely used solar module all is made up of the low iron toughened glass of ultrawhite, two-layer EVA layer (ethylene-vinyl acetate copolymer), the solar cell and the backboard that are arranged in the two-layer EVA layer basically, these elements heated lamination under vacuum becomes as a whole, aluminum alloy frame and terminal box are installed then, become solar module.When solar components was worked, the sunlight that sees through the low iron toughened glass of ultrawhite was absorbed by solar cell and produces photoelectric current, when assembly is connected with load, will form power output.In order to improve the output of solar module as much as possible, promptly improve the conversion efficiency of assembly, in present technology, taked a lot of methods to reach this effect.The battery sheet that uses as assembly is exactly the surface with texture, and is coated with antireflective film to reduce battery to sun reflection of light; The superiors of assembly have used the toughened glass that is coated with antireflective film to increase the transmitance of light in addition; The backboard that uses of the assembly surface of having adopted white light in addition, when solar irradiation is mapped on the backboard in battery sheet gap, the surface of its white also can increase reflection of light to a certain extent, and then by the reflection of skin glass this part light is absorbed by solar cell.More than several modes to the conversion efficiency that improves solar module all tool have certain effect, but for the third method, though the back plate surface of white can improve reflection of light, but most of light of reflection is utilized seldom by solar cell again, because the light of a lot of reflected backs all is to see through skin glass again to be refracted in the air.The solar module that is 1580mm*808mm with a specification is an example, if the solar battery sheet of its use is of a size of 125mm*125mm, battery sheet quantity is 72, then see through glass and shine wide 12% of the whole assembly light-receiving area that generally accounts on the backboard, if this part luminous energy is well used by solar cell, can significantly improve the conversion efficiency of solar module, increase the power output of assembly.
The wave-length coverage of solar radiation spectrum between 4000 nanometers, comprises ultraviolet light, visible light and infrared light in 150 nanometers, and wherein 7% solar radiation energy is distributed in the ultraviolet spectra district, and 50% in the visible range, and 43% at infrared spectral region.Solar cell is different to the response of different wavelengths of light, and Fig. 1 has provided the spectral response curve of certain silicon solar cell, can see on scheming, and for the sunlight of different wave length, silicon solar cell has different sensitivity.The solar radiation wave-length coverage that can produce photovoltaic effect generally in 400 nanometers in 1200 nanometer range, the sunlight of other wavelength then can not make silicon solar cell produce photogenerated current.This shows that having very most of energy in the solar radiation energy can not be absorbed by solar cell and lose.
Can see from top analysis, shine sunlight on the solar module except being absorbed, also have part to be gone back, only have fraction to be absorbed again by solar cell by the backboard emission by solar cell.In conjunction with the spectral response characteristic of solar cell, how to allow this part light can be the solar cell second use to greatest extent, just become a technical problem.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of solar module with high conversion efficiency, can fully absorb the sunlight that shines battery sheet gap, thereby makes assembly have higher conversion efficiency and power output.
Solar module with high conversion efficiency of the present invention, comprise the low iron toughened glass of the ultrawhite that sets gradually from top to bottom and be packaged as a whole, an EVA layer, the solar battery sheet that is cascaded, the 2nd EVA layer, the 3rd EVA layer and backboard, be equiped with the reflector between the 2nd EVA layer and the 3rd EVA layer, the surface in described reflector is provided with regularly arranged vee-cut.This vee-cut makes assembly have higher reflectivity.
The interior angle of described vee-cut is 120 degree～138 degree.Its incidence angle, did not lose and can not be refracted in the air to be absorbed by the battery sheet greater than critical angle generation total reflection when the light that can guarantee the reflection of two faces of vee-cut like this arrived glass surface.
Described reflector basis material can be polyethylene terephthalate or polyethylene for being a kind of thermoplastic.The thickness in described reflector is 100～250 microns.
The surface-coated in described reflector has fluorescent coating, can improve reflectivity like this.
The material of described fluorescent coating is Y
2O
3: Eu
3+Or NaYF
4: Yb
3+, Er
3+Or both mixtures.Y wherein
2O
3: Eu
3+3+Material can red-emitting under the exciting of ultraviolet light, NaYF
4: Yb
3+, Er
3+Can absorb the infrared light transmitting green light, when solar irradiation is mapped to fluoresent coating, fluorescent material in the coating can absorb ultraviolet light and the infrared light in the sunlight, send visible light simultaneously, be that fluorescent material on this reflector has the visible light of higher sensitivity with not being converted to solar cell by ultraviolet light that solar cell absorbed and infrared light in the sunlight to it, V-groove can more effectively reflex to the visible light after these conversions the toughened glass surface on the battery sheet, because the incidence angle of this part light is greater than critical angle, total reflection takes place, reuptaked utilization by solar cell at last, thereby increased photogenerated current indirectly, promptly increased the power output and the conversion efficiency of assembly.
Described backboard is made by the polyvinyl fluoride composite film material, has ageing-resistant, corrosion-resistant, as to stop water vapor permeable ability and good insulation performance performance.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1: the spectral response figure of silicon solar cell.
Fig. 2: the profile of solar module.
Fig. 3: the part section enlarged drawing of solar module, the therefrom structure in reflector 4 as can be seen.
Among Fig. 2,1 is the low iron toughened glass of ultrawhite, and 21 is an EVA layer, and 22 is the 2nd EVA layer, and 23 is the 3rd EVA layer, and 3 is solar battery sheet, and 4 is the reflector, and 5 is backboard;
Among Fig. 3,6 is V-groove, and 7 is fluorescent coating.
Embodiment:
As shown in Figure 2, the solar battery sheet 3 that a kind of solar module with high conversion efficiency of the present invention comprises the low iron toughened glass 1 of the ultrawhite that is arranged in order from top to bottom, an EVA layer 21, is cascaded with welding, the 2nd EVA layer 22, be equiped with reflector 4 between the 3rd EVA layer 23 and backboard 5, the two EVA layers 22 and the 3rd EVA layer 23.Wherein toughened glass has high transmission rate and plays the effect of protecting solar battery sheet; the EVA material has the effect of sealing and bonding; and backboard 5 is TPT (polyvinyl fluoride composite membrane) material, has ageing-resistant, corrosion-resistant, as to stop water vapor permeable ability and good insulation performance performance.Layers of material is laid in order, put it into vacuum laminator and carry out the high temperature lamination, three layers of EVA layer are wherein solidified, become as a whole laminate, laminate is done deburring to be handled, frame up with aluminum alloy frame at last, promptly obtained having the solar module of higher conversion efficiency.
In the present embodiment, described reflector 4 basis materials are polyethylene terephthalate (PET), thickness is 200 microns, as shown in Figure 3, the surface in reflector 4 has a lot of regularly arranged vee-cuts 6, and the interior angle of described vee-cut 6 is 120 degree～138 degree, as preferably, angle is 130 degree in it, and the surface-coated in the reflector has fluorescent coating 7 in addition, and the material of coating can be Y
2O
3: Eu
3+Or NaYF
4: Yb
3+, Er
3+Or both mixtures.Y wherein
2O
3: Eu
3+Fluorescent material can absorb the ultraviolet light of 254nm and send the ruddiness of 613nm, NaYF
4: Yb
3+, Er
3+The infrared light that fluorescent material then absorbs 970nm sends the green glow of 540nm, the fluorescent material that the sunlight that shines battery sheet gap is reflected on the layer is converted to visible light, because the surface, reflector has high reflectance, this part visible light is reflected on the glass surface of the assembly the superiors then, because the angle of vee-cut is 130 degree, the incidence angle that then incides glass surface light is 50 degree.The refractive index of toughened glass about 1.5, when light when glass (optically denser medium) enters into air (optically thinner medium), critical angle is 42 degree.In such cases, the incidence angle of light is greater than critical angle, therefore total reflection takes place, this part light is reflected to the battery sheet again, and absorbed by the battery sheet, this effect strengthens the light intensity that incides on the solar battery sheet indirectly, thereby increases photogenerated current, finally increases the conversion efficiency and the power output of assembly.
The present invention is not limited to the vee-cut in the above-mentioned execution mode; also can undulate or other similar shapes as the surface, reflector; as long as utilized design of the present invention; promptly below the battery sheet, the reflector is set; with shining the sunlight reflection in battery sheet gap and being used, all drop within protection scope of the present invention.
Claims (8)
1. solar module with high conversion efficiency, comprise the low iron toughened glass (1) of the ultrawhite that sets gradually from top to bottom and be packaged as a whole, an EVA layer (21), the solar battery sheet (3) that is cascaded, the 2nd EVA layer (22), the 3rd EVA layer (23) and backboard (5), it is characterized in that: be equiped with reflector (4) between the 2nd EVA layer (22) and the 3rd EVA layer (23).
2. solar module as claimed in claim 1 is characterized in that: the surface of described reflector (4) is provided with regularly arranged vee-cut (6).
3. solar module as claimed in claim 2 is characterized in that: the interior angle of described vee-cut (6) is 120 degree～138 degree.
4. solar module as claimed in claim 1 is characterized in that: described reflector (4) basis material is polyethylene terephthalate or polyethylene.
5. solar module as claimed in claim 1 is characterized in that: the thickness of described reflector (4) is 100～250 microns.
6. as the described solar module of the arbitrary claim of claim 1 to 5, it is characterized in that: the surface-coated of described reflector (4) has fluorescent coating (7).
7. solar module as claimed in claim 6 is characterized in that: the material of described fluorescent coating (7) is Y
2O
3: Eu
3+Or NaYF
4: Yb
3+, Er
3+
8. solar module as claimed in claim 1 is characterized in that: described backboard is made by the polyvinyl fluoride composite film material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101987686A CN102280512A (en) | 2010-06-11 | 2010-06-11 | Solar cell module with high conversion efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101987686A CN102280512A (en) | 2010-06-11 | 2010-06-11 | Solar cell module with high conversion efficiency |
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|---|---|
| CN102280512A true CN102280512A (en) | 2011-12-14 |
Family
ID=45105827
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101987686A Pending CN102280512A (en) | 2010-06-11 | 2010-06-11 | Solar cell module with high conversion efficiency |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544174A (en) * | 2012-01-06 | 2012-07-04 | 南通美能得太阳能电力科技有限公司 | Solar cell assembly for increasing light energy utilization ratio |
| CN102709371A (en) * | 2012-05-08 | 2012-10-03 | 常州天合光能有限公司 | Solder strip structure for solar cell module |
| CN102779879A (en) * | 2012-08-13 | 2012-11-14 | 中利腾晖光伏科技有限公司 | Anti-glare photovoltaic module |
| CN103094393A (en) * | 2013-01-24 | 2013-05-08 | 尚越光电科技有限公司 | Fluorescence concentrating solar energy cell based on three cesium iodide tin and preparing method thereof |
| WO2013134983A1 (en) * | 2012-03-16 | 2013-09-19 | 友达光电股份有限公司 | Solar module capable of absorbing ultraviolet waveband and method for manufacturing same |
| CN103552314A (en) * | 2013-11-07 | 2014-02-05 | 英利集团有限公司 | Solar cell backboard and solar cell assembly with same |
| CN104038142A (en) * | 2014-06-17 | 2014-09-10 | 信阳师范学院 | Universal easily-installed photovoltaic component and photovoltaic mounting structure using the same |
| CN104112785A (en) * | 2014-07-31 | 2014-10-22 | 明冠新材料股份有限公司 | Film used for synergistic type solar cell back plate and preparation method thereof |
| CN104465831A (en) * | 2014-12-19 | 2015-03-25 | 江苏宇昊新能源科技有限公司 | Adhesive film for building photovoltaic module |
| CN105218937A (en) * | 2015-10-29 | 2016-01-06 | 严梅霞 | The EVA master batch of EVA adhesive film |
| CN106653902A (en) * | 2016-12-01 | 2017-05-10 | 梁结平 | Solar battery assembly |
| CN106784107A (en) * | 2016-12-01 | 2017-05-31 | 梁结平 | A kind of photovoltaic module with high conversion efficiency |
| CN107564984A (en) * | 2017-07-18 | 2018-01-09 | 苏州中来光伏新材股份有限公司 | A kind of high durable, high-gain solar cell backboard, component and preparation method |
| CN108010991A (en) * | 2017-12-19 | 2018-05-08 | 泰州中来光电科技有限公司 | A kind of solar cell backboard, component and preparation method with upper conversion function |
| CN108919558A (en) * | 2018-06-25 | 2018-11-30 | 福州大学 | A kind of quantum dot color membrane structure of wedge-shaped substrate |
| CN109196661A (en) * | 2016-05-19 | 2019-01-11 | 巴斯夫涂料有限公司 | Photovoltaic module |
| CN109539104A (en) * | 2018-10-22 | 2019-03-29 | 扬州新思路光电科技有限公司 | Energy-saving LED solar street light |
| CN110529807A (en) * | 2012-08-03 | 2019-12-03 | 常州亚玛顿股份有限公司 | Solar illuminating system |
| CN111224607A (en) * | 2020-02-24 | 2020-06-02 | 中国电子科技集团公司第四十八研究所 | Photovoltaic power generation system based on thermo-optic effect and application |
| WO2020233036A1 (en) * | 2019-05-17 | 2020-11-26 | 苏州大学 | Photovoltaic battery assembly |
| CN113314634A (en) * | 2020-07-23 | 2021-08-27 | 中天光伏材料有限公司 | Solar cell backboard with down-conversion function and preparation method thereof |
| CN113471315A (en) * | 2021-06-22 | 2021-10-01 | 浙江中聚材料有限公司 | Backboard component capable of improving photovoltaic efficiency |
| CN118538779A (en) * | 2024-07-25 | 2024-08-23 | 苏州腾晖光伏技术有限公司 | Back contact solar cell and preparation method thereof |
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Cited By (27)
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|---|---|---|---|---|
| CN102544174A (en) * | 2012-01-06 | 2012-07-04 | 南通美能得太阳能电力科技有限公司 | Solar cell assembly for increasing light energy utilization ratio |
| CN102544174B (en) * | 2012-01-06 | 2014-02-19 | 南通美能得太阳能电力科技有限公司 | Solar cell assembly for increasing light energy utilization ratio |
| TWI459573B (en) * | 2012-03-16 | 2014-11-01 | Au Optronics Corp | Ultraviolet light absorb solar module and fabrictaing method thereof |
| WO2013134983A1 (en) * | 2012-03-16 | 2013-09-19 | 友达光电股份有限公司 | Solar module capable of absorbing ultraviolet waveband and method for manufacturing same |
| CN102709371A (en) * | 2012-05-08 | 2012-10-03 | 常州天合光能有限公司 | Solder strip structure for solar cell module |
| CN110529807A (en) * | 2012-08-03 | 2019-12-03 | 常州亚玛顿股份有限公司 | Solar illuminating system |
| CN102779879A (en) * | 2012-08-13 | 2012-11-14 | 中利腾晖光伏科技有限公司 | Anti-glare photovoltaic module |
| CN103094393B (en) * | 2013-01-24 | 2016-07-06 | 尚越光电科技有限公司 | Fluorescence concentrating solar battery based on cesium triiodide stannum and preparation method thereof |
| CN103094393A (en) * | 2013-01-24 | 2013-05-08 | 尚越光电科技有限公司 | Fluorescence concentrating solar energy cell based on three cesium iodide tin and preparing method thereof |
| CN103552314A (en) * | 2013-11-07 | 2014-02-05 | 英利集团有限公司 | Solar cell backboard and solar cell assembly with same |
| CN104038142A (en) * | 2014-06-17 | 2014-09-10 | 信阳师范学院 | Universal easily-installed photovoltaic component and photovoltaic mounting structure using the same |
| CN104112785A (en) * | 2014-07-31 | 2014-10-22 | 明冠新材料股份有限公司 | Film used for synergistic type solar cell back plate and preparation method thereof |
| CN104465831A (en) * | 2014-12-19 | 2015-03-25 | 江苏宇昊新能源科技有限公司 | Adhesive film for building photovoltaic module |
| CN105218937A (en) * | 2015-10-29 | 2016-01-06 | 严梅霞 | The EVA master batch of EVA adhesive film |
| CN109196661A (en) * | 2016-05-19 | 2019-01-11 | 巴斯夫涂料有限公司 | Photovoltaic module |
| CN106784107A (en) * | 2016-12-01 | 2017-05-31 | 梁结平 | A kind of photovoltaic module with high conversion efficiency |
| CN106653902A (en) * | 2016-12-01 | 2017-05-10 | 梁结平 | Solar battery assembly |
| CN107564984A (en) * | 2017-07-18 | 2018-01-09 | 苏州中来光伏新材股份有限公司 | A kind of high durable, high-gain solar cell backboard, component and preparation method |
| CN108010991A (en) * | 2017-12-19 | 2018-05-08 | 泰州中来光电科技有限公司 | A kind of solar cell backboard, component and preparation method with upper conversion function |
| CN108919558A (en) * | 2018-06-25 | 2018-11-30 | 福州大学 | A kind of quantum dot color membrane structure of wedge-shaped substrate |
| CN109539104A (en) * | 2018-10-22 | 2019-03-29 | 扬州新思路光电科技有限公司 | Energy-saving LED solar street light |
| WO2020233036A1 (en) * | 2019-05-17 | 2020-11-26 | 苏州大学 | Photovoltaic battery assembly |
| CN111224607A (en) * | 2020-02-24 | 2020-06-02 | 中国电子科技集团公司第四十八研究所 | Photovoltaic power generation system based on thermo-optic effect and application |
| CN113314634A (en) * | 2020-07-23 | 2021-08-27 | 中天光伏材料有限公司 | Solar cell backboard with down-conversion function and preparation method thereof |
| CN113471315A (en) * | 2021-06-22 | 2021-10-01 | 浙江中聚材料有限公司 | Backboard component capable of improving photovoltaic efficiency |
| CN118538779B (en) * | 2024-07-25 | 2024-10-18 | 苏州腾晖光伏技术有限公司 | Back contact solar cell and preparation method thereof |
| CN118538779A (en) * | 2024-07-25 | 2024-08-23 | 苏州腾晖光伏技术有限公司 | Back contact solar cell and preparation method thereof |
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Application publication date: 20111214 |