CN102130196A - Low-resistance crystalline silicon solar cell component - Google Patents
Low-resistance crystalline silicon solar cell component Download PDFInfo
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- CN102130196A CN102130196A CN2010106200319A CN201010620031A CN102130196A CN 102130196 A CN102130196 A CN 102130196A CN 2010106200319 A CN2010106200319 A CN 2010106200319A CN 201010620031 A CN201010620031 A CN 201010620031A CN 102130196 A CN102130196 A CN 102130196A
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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 low-resistance crystalline silicon solar cell component which comprises a solar cell, wherein a front surface main grid line of the solar cell comprises a reflection section grid line and a welding section grid line, the width of the reflection section grid line is less than that of the welding line grid line, the width of the welding section grid line is 2-5mm, and the width of the reflection section grid line is 0.1-0.8mm. A back surface electrode main grid line is arranged on the back surface of the solar cell, the back surface electrode main grid line comprises a wide welding section corresponding to the welding section grid line on the front surface and a narrow grid section which is connected with the wide welding section and extends to the middle part of the back surface. By adopting the low-resistance crystalline silicon solar cell component, the light loss and the resistance loss of the solar cell component can be reduced, the optical loss can be reduced by 2-4%, and the power of the solar cell component can be improved by 4-6%.
Description
Technical field
The present invention relates to the solar module technical field, especially a kind of low-resistance crystalline silicon solar cell modules.
Background technology
Crystalline silicon solar cell modules is generally formed by the protective material encapsulation by tens of solar cell 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 cell.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, common solar cell front electrode grid line generally is made up of 2～4 main grid lines and 40～100 thin grid lines, and linear welding one end is welded on the battery front side main grid line, and 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 low-resistance 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 low-resistance crystalline silicon solar cell modules, and solar cell front main grid line is made up of reflective section grid line and welding section grid line, and the width of reflective section grid line is less than the width of welding section grid line.
Further, described welding section grid line width is 2～5mm, and the width of described reflective section grid line is 0.1～0.8mm.
Further, described reflective section grid line has the double-wedge section.
Further, described reflective section grid line comprises a prismatic copper base material, covers silver coating on the copper base material, and the copper base material is pressed together on the bottom gate line of copper base material bottom by conductive silver glue.
Further, the quantity of described front electrode main grid line is 3～10.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.
Further, described back of solar cell 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.The width of the narrow grid section of backplate main grid line has increased back of the body field area less than the width of wide welding section, has further improved battery component efficient.
A kind of connection welding that the solar cell of described low-resistance crystalline silicon solar cell modules is connected mutually of being used for, have plural front welding section and plural back side welding section, the width of described front welding section is greater than the width of back side welding section, and adjacent front welding section interconnects.Described single front welding section width is 2～5mm, and described single back side 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.
A kind of connection welding that the solar cell of described low-resistance crystalline silicon solar cell modules is connected mutually of being used for, have more than one front welding section and more than one back side welding section, the width of described front welding section is greater than the width of back side welding section, and adjacent front welding section is separated from each other.Described single front welding section width is 2～5mm, and described single back side welding section width is 0.1～0.8mm.
The front welding section of the connection welding of battery strings coupling is wide, and it is little to guarantee to connect resistance, and back side welding section is narrow, the use of having saved the welding materials used and having saved battery conductive silver slurry.
The invention has the beneficial effects as follows: the narrowed width of reflective section grid line of the present invention, the width of welding section grid line broadens, and effectively reduces the series resistance of battery, and the copper base material cross section in reflective section grid line is a prismatic, thereby constitute big depth-width ratio cross section, further reduced the series resistance of battery.After light arrived reflective section grid line surface by solar module glass, EVA encapsulated layer, reflection formed total reflection through the EVA encapsulated layer at glass and air surface, secondary reflect to battery surface again, absorbed, convert electric energy to by battery, reduce 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.The present invention can reduce solar module light loss and ohmic loss simultaneously, 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 cell in the prior art;
Fig. 2 is the structural representation of solar cell 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 and low-resistance crystalline silicon solar cell modules, has solar cell, the solar cell front has front main grid line, the quantity of solar cell front main grid line is 5, solar cell front 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 cell front edge place, and welding section grid line width is 2～5mm, and reflective section grid line 1 is positioned at the solar cell 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, back of solar cell 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.The width of the narrow grid section of backplate main grid line is less than the width of wide welding section.
As shown in Figure 4, after light arrives reflective section grid line surface by solar module glass, EVA encapsulated layer, reflection is through the EVA encapsulated layer, form total reflection at glass and air surface, secondary reflect to battery surface again, absorbed, convert electric energy to by battery, reduce optical loss, improved battery efficiency.
As shown in Figure 5, a kind of connection welding that the solar cell of low-resistance 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 cell of low-resistance 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 cell of reflective section grid line 1 from formation.Adopt and connect welding, the welding section of the front electrode main grid line of solar cell and the middle part section of dwindling of another back of solar cell electrode main grid line are together in series mutually, and the some of connecting the as required solar cells and the back of setting type are made into the solar 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 (6)
1. low-resistance crystalline silicon solar cell modules, it is characterized in that: solar cell front main grid line is made up of reflective section grid line and welding section grid line, and the width of reflective section grid line is less than the width of welding section grid line.
2. a kind of low-resistance crystalline silicon solar cell modules according to claim 1 is characterized in that: described welding section grid line width is 2～5mm, and the width of described reflective section grid line is 0.1～0.8mm.
3. a kind of low-resistance crystalline silicon solar cell modules according to claim 1 is characterized in that: described reflective section grid line has the double-wedge section.
4. a kind of low-resistance crystalline silicon solar cell modules according to claim 3 is characterized in that: described reflective section grid line comprises a prismatic copper base material.
5. a kind of low-resistance crystalline silicon solar cell modules according to claim 1 is characterized in that: the quantity of described front electrode main grid line is 3～10.
6. a kind of low-resistance crystalline silicon solar cell modules according to claim 1, it is characterized in that: described back of solar cell 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106200319A CN102130196A (en) | 2010-12-31 | 2010-12-31 | Low-resistance crystalline silicon solar cell component |
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| CN2010106200319A CN102130196A (en) | 2010-12-31 | 2010-12-31 | Low-resistance crystalline silicon solar cell component |
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| CN102130196A true CN102130196A (en) | 2011-07-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785037A (en) * | 2012-08-27 | 2012-11-21 | 天津英利新能源有限公司 | Polycrystalline photovoltaic component and welding method thereof |
| CN102888196A (en) * | 2012-09-13 | 2013-01-23 | 烟台德邦科技有限公司 | Novel electric condition adhesive film and preparation method thereof |
| CN102969370A (en) * | 2012-12-17 | 2013-03-13 | 中利腾晖光伏科技有限公司 | Break-proof type grid crystalline silicon solar cell |
| CN110076456A (en) * | 2019-05-29 | 2019-08-02 | 浙江晶科能源有限公司 | A kind of photovoltaic welder, photovoltaic module manufacturing equipment and solar battery |
| CN110518077A (en) * | 2019-08-30 | 2019-11-29 | 苏州阿特斯阳光电力科技有限公司 | A kind of solar battery sheet and photovoltaic module |
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| JPH08287969A (en) * | 1995-04-13 | 1996-11-01 | Murata Mfg Co Ltd | Photocell |
| CN1828946A (en) * | 2005-02-28 | 2006-09-06 | 三洋电机株式会社 | Stacked photovoltaic device and method of manufacturing the same |
| 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 | ***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 CN2010106200319A patent/CN102130196A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08287969A (en) * | 1995-04-13 | 1996-11-01 | Murata Mfg Co Ltd | Photocell |
| CN1828946A (en) * | 2005-02-28 | 2006-09-06 | 三洋电机株式会社 | Stacked photovoltaic device and method of manufacturing the same |
| CN101641800A (en) * | 2007-10-12 | 2010-02-03 | ***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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785037A (en) * | 2012-08-27 | 2012-11-21 | 天津英利新能源有限公司 | Polycrystalline photovoltaic component and welding method thereof |
| CN102785037B (en) * | 2012-08-27 | 2015-03-11 | 天津英利新能源有限公司 | Polycrystalline photovoltaic component and welding method thereof |
| CN102888196A (en) * | 2012-09-13 | 2013-01-23 | 烟台德邦科技有限公司 | Novel electric condition adhesive film and preparation method thereof |
| CN102888196B (en) * | 2012-09-13 | 2015-02-18 | 烟台德邦科技有限公司 | Novel electric condition adhesive film and preparation method thereof |
| CN102969370A (en) * | 2012-12-17 | 2013-03-13 | 中利腾晖光伏科技有限公司 | Break-proof type grid crystalline silicon solar cell |
| CN110076456A (en) * | 2019-05-29 | 2019-08-02 | 浙江晶科能源有限公司 | A kind of photovoltaic welder, photovoltaic module manufacturing equipment and solar battery |
| CN110518077A (en) * | 2019-08-30 | 2019-11-29 | 苏州阿特斯阳光电力科技有限公司 | A kind of solar battery sheet and photovoltaic module |
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Application publication date: 20110720 |