CN102142477B - Reflective crystalline silicon solar cell module - Google Patents
Reflective crystalline silicon solar cell module Download PDFInfo
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- CN102142477B CN102142477B CN2010106208537A CN201010620853A CN102142477B CN 102142477 B CN102142477 B CN 102142477B CN 2010106208537 A CN2010106208537 A CN 2010106208537A CN 201010620853 A CN201010620853 A CN 201010620853A CN 102142477 B CN102142477 B CN 102142477B
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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
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Abstract
The invention relates to a reflective crystalline silicon solar cell module with low resistance, which comprises glass, an EVA (Ethylene-Vinyl Acetate) packaging layer and a solar cell film. A rhombus structure is arranged on a main gate line of the illuminated face of the solar cell film. The rhombus structure reflects light rays shining on the main gate line, and the reflected light forms total reflection on the surfaces of the glass and air through the EVA packaging layer and is reflected on the surface of the cell which is not blocked by the main gate line. The rhombus structure is a linear copper base material with a rhombus section, and the outer surface of the copper base material is electroplated with a silver layer for enhancing the reflected light on the main gate line. The copper base material is pressed on the main gate line through silver conductive adhesive. The light loss and the resistance loss of the solar cell module can be reduced, the optical loss can be reduced by 2-4%, and the power of the solar cell module can be increased by 4-6%.
Description
Technical field
The present invention relates to the solar module technical field, especially a kind of reflective crystalline silicon solar cell modules.
Background technology
Crystalline silicon solar cell modules is generally by forming by the protective material encapsulation after the tens of solar battery sheet series connection.Improve that solar battery assembly efficiency is main several approach: promote battery efficiency; Reduce the assembly optical loss; Reduce the contact resistance of solar battery sheet.Promote the battery efficiency aspect, numerous scientific research personnel improve battery itself to the absorption of spectrum from aspects such as selective emitter, backplate, hetero-junction solar cells, reduce cell resistance to the loss of power; On the other hand, comprise glass, EVA, the high thoroughly optical property at silica gel, the back side etc. from the lifting subassembly material, optimize the electric properties such as connection welding belt, conductive tape, terminal box, by-pass diode and improve that the research work of component efficiency is also common to be reported in patent and document.
As shown in Figure 1, conventional solar cells sheet front electrode grid line, generally be comprised of 2～4 main grid lines and 40～100 thin grid lines, linear welding one end is welded on the battery front side main grid line, an end is welded in another cell backside can realize connection between the battery.If encrypt the series resistance that grid line reduces battery and assembly by widening, but the shielded area increase will bring more optical losss.
The back side contact battery of Sunpower company adopts the back side to bury the grid line technology underground, and reduce the face-up optical loss and reduced simultaneously series resistance, but the technique relative complex, cost is higher; Reduce the optical loss aspect, AsbergIngma etc. have proposed little V-type groove design, 110～130 ° of angles, outermost reflector uses Ag, Al, Au or reflective polymer material, the effective light-reflecting portion of V-type is positioned on cell piece gap and the battery main grid line, and reflective welding links to each other with the cell piece back side by the plane feeler at two ends, the V-type left and right sides, reaches to reduce assembly light loss purpose, but this design is difficult for reducing the battery contact resistance so that welding battery becomes a difficult problem.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, a kind of reflective crystalline silicon solar cell modules is provided, can reduce solar module light loss and ohmic loss.
The technical solution adopted for the present invention to solve the technical problems is: a kind of reflective crystalline silicon solar cell modules, comprise glass, EVA encapsulated layer and solar battery sheet, configure prismatic structure on the main grid line of solar battery sheet sensitive surface, described prismatic structure will be mapped to the light reflection of main grid line, reverberation forms total reflection by the EVA encapsulated layer at glass and air surface, secondary reflects to the battery surface that is not blocked by the main grid line.
Further, the solar battery sheet sensitive surface has the main grid line, the main grid line is comprised of reflective section grid line and welding section grid line, the width of reflective section grid line is less than the width of welding section grid line, copper base material cross section in reflective section grid line is single prismatic, and the welding section grid line is positioned at solar battery sheet front edge place, and welding section grid line width is 2～5mm, reflective section grid line is positioned at the solar battery sheet middle part, and the width of reflective section grid line is 0.1～0.8mm.
Further, described prismatic structure is the line style copper base material of double-wedge section.Described copper base material outer surface electroplates to strengthen the silver layer of main grid line reflection light.Described copper base material is pressed together on the main grid line by conductive silver glue.
Further, the quantity of described main grid line is 3 to 10.For example, the quantity of front electrode main grid line is 5.Front electrode main grid line quantity has reduced the series resistance of assembly to a certain extent than the increase of conventional batteries.
The invention has the beneficial effects as follows: configure prismatic structure on the main grid line of solar battery sheet sensitive surface, prismatic structure will be mapped to the light reflection of main grid line, reverberation forms total reflection by the EVA encapsulated layer at glass and air surface, secondary reflect to the battery surface that is not blocked by the main grid line, reverberation is absorbed by battery, convert electric energy to, reduced optical loss, improved battery efficiency.The present invention has increased the conductive silver glue process for pressing on the copper base material is pressed together on copper base material bottom by conductive silver glue the bottom gate line.Invention can reduce solar module light loss and ohmic loss, can reduce optical loss 2～4%, and solar module power can promote 4～6%.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of solar battery sheet in the prior art;
Fig. 2 is the structural representation of solar battery sheet among the present invention;
Fig. 3 is the schematic cross-section of reflective section grid line among the present invention;
Fig. 4 is that the rear reflective section grid line of solar module encapsulation partly reduces the light loss schematic diagram among the present invention;
Fig. 5 is the structural representation of the embodiment one of connection welding belt among the present invention;
Fig. 6 is the structural representation of the embodiment two of connection welding belt among the present invention;
Fig. 7 is schematic rear view of the present invention;
Wherein: 1. reflective section grid line, 2. welding section grid line, 3. copper base material, 4. silver coating, 5. conductive silver glue, 6. bottom gate line.
Embodiment
The invention will be further described in conjunction with specific embodiments now, and following examples are intended to illustrate the present invention rather than limitation of the invention further.
Shown in Figure 3 such as Fig. 2, a kind of reflective crystalline silicon solar cell modules, comprise glass, EVA encapsulated layer and solar battery sheet, the solar battery sheet sensitive surface has the main grid line, the quantity of main grid line is 5, the main grid line is comprised of reflective section grid line 1 and welding section grid line 2, the width of reflective section grid line 1 is less than the width of welding section grid line 2, reflective section grid line 1 has the copper base material 3 of double-wedge section, cover silver coating 4 on the copper base material 3, copper base material 3 is pressed together on the bottom gate line 6 of copper base material 3 bottoms by conductive silver glue.
Welding section grid line 2 is positioned at solar battery sheet front edge place, and welding section grid line width is 2～5mm, and reflective section grid line 1 is positioned at the solar battery sheet middle part, and the width of reflective section grid line is 0.1～0.8mm.The narrowed width of reflective section grid line 1, the width of welding section grid line 2 broadens, and effectively reduces the series resistance of battery, and copper base material 3 cross sections in reflective section grid line 1 are single prismatic, thereby consist of large depth-width ratio cross section, have further reduced the series resistance of battery.
As shown in Figure 7, the solar cell back mask has backplate main grid line, and backplate main grid line is by the wide welding section corresponding with front welding section grid line and the narrow grid section that is connected and extends to middle part, the back side with wide welding section.
As shown in Figure 4, configure prismatic structure on the main grid line of solar battery sheet sensitive surface, prismatic structure will be mapped to the light reflection of main grid line, reverberation forms total reflection by the EVA encapsulated layer at glass and air surface, secondary reflect to the battery surface that is not blocked by the main grid line, reverberation is absorbed by battery, converts electric energy to, reduce optical loss, improved battery efficiency.
As shown in Figure 5, a kind of connection welding belt for the solar battery sheet of reflective crystalline silicon solar cell modules is connected mutually, embodiment one: have 5 front welding sections and 5 back side welding sections, the width of front welding section is greater than the width of back side welding section, and adjacent front welding section interconnects.Single front welding section width is that the described single back side of 2～5mm welding section width is 0.1～0.8mm.The front welding section of connection welding belt interconnects, and a plurality of pads itself interconnect by single welding and are connected in parallel, and have improved connective stability, simultaneously also so that welding processing is convenient.
As shown in Figure 6, a kind of connection welding belt for the solar battery sheet of reflective crystalline silicon solar cell modules is connected mutually, embodiment two: have 5 front welding sections and 5 back side welding sections, the width of front welding section is greater than the width of back side welding section, and adjacent front welding section is separated from each other.Single front welding section width is 2～5mm, and single back side welding section width is 0.1～0.8mm.
The production process of the solar module among the present invention is: after P type polysilicon silicon chip plates antireflective film through cleaning, sour making herbs into wool, phosphorus diffusion PN junction processed, PECVD, and printing front electrode main grid line and aluminium back surface field, and sintering forms good electrically contacting.Superimposed conductive silver glue 5 on the bottom gate line 6 of reflective section grid line 1 again, the prismatic copper base material 3 that will have a silver coating 4 is pressed together on the conductive silver glue 5 and solidifies, and has the solar battery sheet of reflective section grid line 1 from formation.Adopt connection welding belt, the welding section of the front electrode main grid line of solar battery sheet and the middle part section of dwindling of another solar cell back face electrode main grid line are together in series mutually, the some of connecting as required solar battery sheets and set type after is made into the solar cell chip module that can be used for outdoor generating with encapsulating materials such as EVA, glass.
Eventually the above, the present invention can reduce solar module light loss and ohmic loss simultaneously, can reduce optical loss 2～4%, solar module power can promote 4～6%.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, the relevant staff can in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (4)
1. reflective crystalline silicon solar cell modules, comprise glass, EVA encapsulated layer and solar battery sheet, it is characterized in that: the solar battery sheet sensitive surface has the main grid line, the main grid line is comprised of reflective section grid line and welding section grid line, the width of reflective section grid line is less than the width of welding section grid line, copper base material cross section in reflective section grid line is single prismatic, the welding section grid line is positioned at solar battery sheet front edge place, welding section grid line width is 2～5mm, reflective section grid line is positioned at the solar battery sheet middle part, and the width of reflective section grid line is 0.1～0.8mm.
2. a kind of reflective crystalline silicon solar cell modules according to claim 1, it is characterized in that: described copper base material outer surface electroplates to strengthen the silver layer of main grid line reflection light.
3. a kind of reflective crystalline silicon solar cell modules according to claim 1, it is characterized in that: described copper base material is pressed together on the main grid line by conductive silver glue.
4. a kind of reflective crystalline silicon solar cell modules according to claim 1, it is characterized in that: the quantity of described main grid line is 3 to 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106208537A CN102142477B (en) | 2010-12-31 | 2010-12-31 | Reflective crystalline silicon solar cell module |
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| CN2010106208537A CN102142477B (en) | 2010-12-31 | 2010-12-31 | Reflective crystalline silicon solar cell module |
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| CN102142477A CN102142477A (en) | 2011-08-03 |
| CN102142477B true CN102142477B (en) | 2013-04-24 |
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| CN115148835B (en) * | 2021-03-31 | 2023-10-27 | 泰州隆基乐叶光伏科技有限公司 | Solar cell precursor, preparation method, solar cell and photovoltaic module |
| CN115513310A (en) * | 2022-11-02 | 2022-12-23 | 太原国科半导体光电研究院有限公司 | II-class superlattice infrared detector unit structure, preparation method thereof and II-class superlattice infrared focal plane detector |
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| JPH08287969A (en) * | 1995-04-13 | 1996-11-01 | Murata Mfg Co Ltd | Photocell |
| WO2009047815A1 (en) * | 2007-10-12 | 2009-04-16 | System S.P.A. | A process for connecting photovoltaic cells in series, a photovoltaic cell connectable in series using the process, and a module obtained with the process |
| JP2011517118A (en) * | 2008-04-11 | 2011-05-26 | クォルコム・メムズ・テクノロジーズ・インコーポレーテッド | Methods for improving PV aesthetics and efficiency |
| JP2010087060A (en) * | 2008-09-30 | 2010-04-15 | Sanyo Electric Co Ltd | Solar cell module |
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Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Co-patentee after: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Patentee after: TRINA SOLAR Co.,Ltd. Address before: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Co-patentee before: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Patentee before: trina solar Ltd. |
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Address after: Solar photovoltaic industry park Tianhe Road 213031 north of Jiangsu Province, Changzhou City, No. 2 Co-patentee after: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Patentee after: trina solar Ltd. Address before: 213031, No. 2, Tianhe Road, Xinbei Industrial Park, Jiangsu, Changzhou Co-patentee before: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Patentee before: CHANGZHOU TRINA SOLAR ENERGY Co.,Ltd. |
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