CN102142477A - Reflective crystalline silicon solar cell module - Google Patents
Reflective crystalline silicon solar cell module Download PDFInfo
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- CN102142477A CN102142477A CN2010106208537A CN201010620853A CN102142477A CN 102142477 A CN102142477 A CN 102142477A CN 2010106208537 A CN2010106208537 A CN 2010106208537A CN 201010620853 A CN201010620853 A CN 201010620853A CN 102142477 A CN102142477 A CN 102142477A
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- solar cell
- grid line
- reflective
- crystalline silicon
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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 formed by the protective material encapsulation by tens of solar battery sheet series connection backs.Improve that solar battery assembly efficiency is main several approach: promote battery efficiency; Reduce the assembly optical loss; Reduce the connection resistance of solar battery sheet.Promote the battery efficiency aspect, numerous scientific research personnel improve the absorption of battery to spectrum itself from aspects such as selective emitter, backplate, heterojunction batteries, reduce the loss of cell resistance to power; On the other hand, comprise the optical property at glass, EVA, high saturating silica gel, the back side etc. from the lifting subassembly material, optimize electric properties such as connecting welding, conductive tape, terminal box, by-pass diode improve the research work of component efficiency also more see in patent and document report.
As shown in Figure 1, conventional solar cells sheet front electrode grid line, generally be made up 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 series resistance simultaneously, but the technology relative complex, cost is higher; Reduce the optical loss aspect, Asberg Ingma etc. has 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 battery sheet gap and the battery main grid line, and reflective welding links to each other with the cell back face by the plane feeler at two ends, the V-type left and right sides, reaches to reduce assembly light loss purpose, but this design makes battery be welded into a difficult problem, is difficult for reducing battery and connects resistance.
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, dispose 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, described prismatic structure is the line style copper base material of double-wedge section.Described copper base material outer surface is electroplated 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: dispose 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 reflective section grid line in solar module encapsulation back partly reduces the light loss schematic diagram among the present invention;
Fig. 5 is the structural representation that connects the embodiment one of welding among the present invention;
Fig. 6 is the structural representation that connects the embodiment two of welding among the present invention;
Fig. 7 is a 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 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 made up 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 prismatic, thereby constitute big 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 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, dispose 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 that the solar battery sheet of reflective crystalline silicon solar cell modules is connected mutually of being used for, 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 that connects welding interconnects, and a plurality of pads itself interconnect by single welding and are connected in parallel, and have improved connective stability, also makes that welding processing is convenient simultaneously.
As shown in Figure 6, a kind of connection welding that the solar battery sheet of reflective crystalline silicon solar cell modules is connected mutually of being used for, 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, phosphorous diffusion system PN junction, PECVD, and printing front electrode main grid line and aluminium back of the body field, and sintering forms good electrical contact.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 and connect welding, 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, and the some of connecting the as required solar battery sheets and the back of setting type are 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%.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.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 (5)
1. reflective crystalline silicon solar cell modules, comprise glass, EVA encapsulated layer and solar battery sheet, it is characterized in that: dispose 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.
2. a kind of reflective crystalline silicon solar cell modules according to claim 1 is characterized in that: described prismatic structure is the line style copper base material of double-wedge section.
3. a kind of reflective crystalline silicon solar cell modules according to claim 2 is characterized in that: described copper base material outer surface is electroplated to strengthen the silver layer of main grid line reflection light.
4. according to claim 2 or 3 described a kind of reflective and low-resistance crystalline silicon solar cell modules, it is characterized in that: described copper base material is pressed together on the main grid line by conductive silver glue.
5. a kind of reflective and low-resistance crystalline silicon solar cell modules according to claim 1 is characterized in that: the quantity of described main grid line is 3 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106208537A CN102142477B (en) | 2010-12-31 | 2010-12-31 | Reflective crystalline silicon solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106208537A CN102142477B (en) | 2010-12-31 | 2010-12-31 | Reflective crystalline silicon solar cell module |
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| CN102142477A true CN102142477A (en) | 2011-08-03 |
| CN102142477B CN102142477B (en) | 2013-04-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206068A1 (en) * | 2021-03-31 | 2022-10-06 | 泰州隆基乐叶光伏科技有限公司 | Solar cell precursor, solar cell preparation method, and solar cell |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08287969A (en) * | 1995-04-13 | 1996-11-01 | Murata Mfg Co Ltd | Photocell |
| WO2009126745A2 (en) * | 2008-04-11 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Method for improving pv aesthetics and efficiency |
| CN101641800A (en) * | 2007-10-12 | 2010-02-03 | 系统股份公司 | Photovoltaic cell that the method for photovoltaic cell, available this method of being connected in series is connected in series and the module that obtains by this method |
| JP2010087060A (en) * | 2008-09-30 | 2010-04-15 | Sanyo Electric Co Ltd | Solar cell module |
-
2010
- 2010-12-31 CN CN2010106208537A patent/CN102142477B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08287969A (en) * | 1995-04-13 | 1996-11-01 | Murata Mfg Co Ltd | Photocell |
| CN101641800A (en) * | 2007-10-12 | 2010-02-03 | 系统股份公司 | Photovoltaic cell that the method for photovoltaic cell, available this method of being connected in series is connected in series and the module that obtains by this method |
| WO2009126745A2 (en) * | 2008-04-11 | 2009-10-15 | Qualcomm Mems Technologies, Inc. | Method for improving pv aesthetics and efficiency |
| JP2010087060A (en) * | 2008-09-30 | 2010-04-15 | Sanyo Electric Co Ltd | Solar cell module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206068A1 (en) * | 2021-03-31 | 2022-10-06 | 泰州隆基乐叶光伏科技有限公司 | Solar cell precursor, solar cell preparation method, and solar cell |
| 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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| CN102142477B (en) | 2013-04-24 |
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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. |