CN104626734A - Back halftone for reducing cost and improving conversion efficiency of single-crystalline-silicon solar battery - Google Patents
Back halftone for reducing cost and improving conversion efficiency of single-crystalline-silicon solar battery Download PDFInfo
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- CN104626734A CN104626734A CN201310571930.8A CN201310571930A CN104626734A CN 104626734 A CN104626734 A CN 104626734A CN 201310571930 A CN201310571930 A CN 201310571930A CN 104626734 A CN104626734 A CN 104626734A
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- back side
- half tone
- halftone
- conversion efficiency
- side half
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a back halftone for reducing cost and improving conversion efficiency of a single-crystalline-silicon solar battery. The back halftone for reducing the cost and improving the conversion efficiency of the single-crystalline-silicon solar battery comprises a back halftone body, printing edges and silicon wafer edges. The printing edges are located on the inner side the back halftone body, the silicon wafer edges are arranged on the outer side of the back halftone body, a plurality of electrodes are vertically welded on the halftone surface, and each electrode is formed by a plurality of electrode monomers. The back halftone for reducing the cost and improving the conversion efficiency of the single-crystalline-silicon solar battery has the advantages that the electrodes on the back halftone body are separated into the electrode monomers, the area of the silver electrodes is reduced, the area of an aluminum back surface field is increased simultaneously, the service life of a minority carrier can be prolonged, absorption of the halftone for infrared rays can be improved, the conversion efficiency can be improved to the maximum, meanwhile, the good welding property of silver paste is guaranteed, the unit consumption of the segmented back electrodes is reduced by 40 percent to 50 percent, the adhesive force is still over 2 N,welding is not influenced, and the efficiency is increased by 0.1 percent to 0.15 percent.
Description
Technical field
The present invention relates to a kind of solar cell, particularly relate to a kind of monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency.
Background technology
Serigraphy is the operation making solar cel electrode, and its principle utilizes the saturating slurry of silk screen visuals mesh, and the general principle of the not saturating slurry of non-graphic part mesh is printed.Slurry defines good Ohmic contact with silicon chip after drying, sintering, and has just made the electrode of solar cell.Thus, the shape of silk screen figure plays an important role to the collection of solar cell electric current, the output of generated output.
The principle of solar cell generating utilizes the photovoltaic effect produce power of p-n junction to change, solar cell is under the irradiation of the sun, photoproduction electric field is defined near p-n junction, luminous energy is converted to electric energy, again by the electrode of solar battery surface by delivery of electrical energy out, silver-colored pulp material printing just to be got on by half tone figure and is made after drying sintering by the electrode of battery surface just.
The material of back of solar cell printing has aluminium paste and silver slurry, and the effect of aluminium paste is the P district, the back side of passivating solar battery, and form P+/P height knot, the effect of silver slurry is similar to wire, plays the effect of conduction and welding; The design of rear surface of solar cell half tone electrode of the prior art is reasonable not, and its electrode is rectangle structure, and this structure makes the area of silver electrode larger, aluminium paste region area reduces, and cause the conversion efficiency of solar cell lower, the ability of electrode collected current is lower, the market competitiveness is low, and the use amount of silver slurry is larger, production cost is high, in addition, if aluminium paste region area is little, then the absorption to ruddiness can be affected, the life-span of few son can reduce, inadvisable.
Summary of the invention
For the problems referred to above that prior art exists, the invention provides a kind of monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency.
To achieve these goals, the technical solution adopted in the present invention is as follows:
A kind of monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency, comprise back side half tone, printed edge and silicon chip edge, described printed edge is positioned at the inner side of described back side half tone, described silicon chip edge is positioned at the outside of described back side half tone, the some segment electrodes of longitudinal measure on the space of a whole page of described back side half tone, every section of described electrode is made up of some electrode monomers.
Further, the width range of every section of described electrode is 2 ~ 3mm, and length range is 110 ~ 150mm, and the spacing range between every two sections of described electrodes is 50 ~ 70mm.
Further, the length range of each described electrode monomer is 10 ~ 18mm, and the spacing range between every two described electrode monomers is between 20 ~ 35mm.
Further, described printed edge is a closed figure, and described silicon chip edge is an intermittent pattern with some spacer segments, and the spacing between described printed edge and described silicon chip edge is 0.8 ~ 1.2mm.
Further, the described back side half tone space of a whole page adopts aluminium paste printing, and every section of described electrode is undertaken printing and welding by silver slurry.
The invention has the beneficial effects as follows: improvements, back side half tone electrode separation is become some segment electrode monomers, make the comparatively prior art increase of aluminium paste region area, the area of aluminium back surface field is added while reducing silver electrode area, the area in aluminium paste region is larger, the life-span of few son will improve, battery will strengthen the absorption of ruddiness, its conversion efficiency just can obtain maximizing and improve, ensure that the welding performance that silver slurry is good simultaneously, back electrode unit consumption through test segmentation reduces 40%-50%, adhesive force is still at more than 2N, do not affect welding, improved efficiency 0.1%-0.15%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention 156 size battery back side half tone prior art.
Fig. 2 is the structural representation after the present invention 156 size battery back side half tone improves.
Fig. 3 is the structural representation of the present invention 125 size battery back side half tone prior art.
Fig. 4 is the structural representation after the present invention 125 size battery back side half tone improves.
Wherein: 1-back side half tone, 2-printed edge, 3-silicon chip edge, 4-electrode, 5-electrode monomer.
Detailed description of the invention
In order to deepen the understanding of the present invention; below in conjunction with drawings and Examples, the present invention is described in further detail; this embodiment is only for explaining the present invention, and do not form protection scope of the present invention and limit, this embodiment is divided into 156 models and 125 model monocrystaline silicon solar cells.
Embodiment one: with reference to accompanying drawing 1, a kind of 156 model monocrystaline silicon solar cell back side half tones reducing costs raising conversion efficiency shown in 2, comprise back side half tone 1, printed edge 2 and silicon chip edge 3, described printed edge 2 is a closed figure, described silicon chip edge 3 is an intermittent pattern with some spacer segments, described back side half tone 1 space of a whole page adopts aluminium paste printing, every section of described electrode 4 is undertaken printing and welding by silver slurry, spacing between described printed edge 2 and described silicon chip edge 3 is 1.0 mm, described printed edge 2 is positioned at the inner side of described back side half tone 1, described silicon chip edge 3 is positioned at the outside of described back side half tone 1, longitudinal measure three segment electrode 4 on the space of a whole page of described back side half tone, the width range of every section of described electrode 4 is 2.5mm, length range is 146mm, spacing range between every two sections of described electrodes 4 is 52mm, every section of described electrode 4 is made up of 5 electrode monomers 5, the length being positioned at two described electrode monomers 5 of half tone 1 rear and front end, the described back side is 15.5mm, the length of three middle described electrode monomers 5 is 11mm, and the spacing between every two described electrode monomers 5 is 20.5mm, close half tone 1 edge, the described back side
The centre position of described electrode 4 and the distance of described printed edge 2 are 25mm.
Embodiment two: with reference to accompanying drawing 3, 125 model monocrystaline silicon solar cell back side half tones shown in 4, be with embodiment one difference, longitudinal measure two segment electrode 4 on the space of a whole page of described back side half tone, the width range of every section of described electrode 4 is 2.5mm, length range is 117mm, spacing range between two sections of described electrodes 4 is 62.5mm, every section of described electrode 4 is made up of 3 electrode monomers 5, the length of each described electrode monomer 5 is 16.4mm, and the spacing between every two described electrode monomers 5 is 33.9mm, described electrode 4 near half tone 1 edge, the described back side
The distance of centre position and described printed edge 2 is 30.25mm.
Claims (5)
1. one kind reduces costs the monocrystaline silicon solar cell back side half tone improving conversion efficiency, comprise back side half tone (1), printed edge (2) and silicon chip edge (3), it is characterized in that: described printed edge (2) is positioned at the inner side at described back side half tone (1), described silicon chip edge (3) is positioned at the outside at described back side half tone (1), the some segment electrodes (4) of longitudinal measure on the space of a whole page of described back side half tone, every section of described electrode (4) is made up of some electrode monomers (5).
2. the monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency according to claim 1, it is characterized in that: the width range of every section of described electrode (4) is 2 ~ 3mm, length range is 110 ~ 150mm, and the spacing range between every two sections of described electrodes (4) is 50 ~ 70mm.
3. the monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency according to claim 1, it is characterized in that: the length range of each described electrode monomer (5) is 10 ~ 18mm, the spacing range between every two described electrode monomers (5) is between 20 ~ 35mm.
4. the monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency according to claim 1, it is characterized in that: described printed edge (2) is a closed figure, described silicon chip edge (3) is an intermittent pattern with some spacer segments, and the spacing between described printed edge (2) and described silicon chip edge (3) is 0.8 ~ 1.2mm.
5. the monocrystaline silicon solar cell back side half tone reducing costs raising conversion efficiency according to claim 1, is characterized in that: described back side half tone (1) space of a whole page adopts aluminium paste printing, and every section of described electrode (4) is undertaken printing and welding by silver slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571930.8A CN104626734A (en) | 2013-11-15 | 2013-11-15 | Back halftone for reducing cost and improving conversion efficiency of single-crystalline-silicon solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310571930.8A CN104626734A (en) | 2013-11-15 | 2013-11-15 | Back halftone for reducing cost and improving conversion efficiency of single-crystalline-silicon solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104626734A true CN104626734A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310571930.8A Pending CN104626734A (en) | 2013-11-15 | 2013-11-15 | Back halftone for reducing cost and improving conversion efficiency of single-crystalline-silicon solar battery |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014460A (en) * | 2003-06-27 | 2005-01-20 | Micro-Tec Co Ltd | Screen printer |
| CN202480535U (en) * | 2012-04-01 | 2012-10-10 | 宁波升科太阳能股份有限公司 | Segmental screen printing plate for cell piece |
| CN102856440A (en) * | 2012-09-25 | 2013-01-02 | 浙江鸿禧光伏科技股份有限公司 | Sectional back electrode design method convenient to weld |
| CN202934909U (en) * | 2012-12-05 | 2013-05-15 | 江苏中宇光伏科技有限公司 | Sectional type back-electrode screen printing plate |
| CN203110501U (en) * | 2013-02-27 | 2013-08-07 | 上海艾力克新能源有限公司 | Novel back electrode screen structure |
| CN203623121U (en) * | 2013-11-15 | 2014-06-04 | 江苏天宇光伏科技有限公司 | Monocrystalline silicon solar cell back screen capable of lowering cost and improving conversion efficiency |
-
2013
- 2013-11-15 CN CN201310571930.8A patent/CN104626734A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014460A (en) * | 2003-06-27 | 2005-01-20 | Micro-Tec Co Ltd | Screen printer |
| CN202480535U (en) * | 2012-04-01 | 2012-10-10 | 宁波升科太阳能股份有限公司 | Segmental screen printing plate for cell piece |
| CN102856440A (en) * | 2012-09-25 | 2013-01-02 | 浙江鸿禧光伏科技股份有限公司 | Sectional back electrode design method convenient to weld |
| CN202934909U (en) * | 2012-12-05 | 2013-05-15 | 江苏中宇光伏科技有限公司 | Sectional type back-electrode screen printing plate |
| CN203110501U (en) * | 2013-02-27 | 2013-08-07 | 上海艾力克新能源有限公司 | Novel back electrode screen structure |
| CN203623121U (en) * | 2013-11-15 | 2014-06-04 | 江苏天宇光伏科技有限公司 | Monocrystalline silicon solar cell back screen capable of lowering cost and improving conversion efficiency |
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Application publication date: 20150520 |