CN103367470A - Directly welded metal wrap trough (MWT) battery back structure - Google Patents
Directly welded metal wrap trough (MWT) battery back structure Download PDFInfo
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- CN103367470A CN103367470A CN2013102829753A CN201310282975A CN103367470A CN 103367470 A CN103367470 A CN 103367470A CN 2013102829753 A CN2013102829753 A CN 2013102829753A CN 201310282975 A CN201310282975 A CN 201310282975A CN 103367470 A CN103367470 A CN 103367470A
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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 discloses a directly welded metal wrap trough (MWT) battery back structure which is provided with a through hole electrode, a positive electrode, through holes and a back electric field, wherein the through hole electrode comprises a welding end and a conductive end; the through holes are arranged at the conductive end of the through hole electrode and are evenly and symmetrically distributed on a battery piece. The battery through hole electrode is designed into a 'T' shape, and the through holes are arranged at one end of the 'T'-shaped electrode, so that asymmetrical distribution of the welding electrode can be realized by the 'T'-shaped design, and an MWT component can be directly welded by rotating a spacer at 180 degrees.
Description
Technical field
The present invention relates to a kind of back of the body contact crystalline silicon solar cell comprising, be specifically related to a kind of metal winding back electrode (Metal Wrap Through, MWT) crystal silicon solar battery back face structure that is adapted to the straight line welding.
Background technology
The photoelectric conversion capacity of solar cell is directly proportional with its light-receiving area, and conventional crystal silicon solar energy battery main grid occupies and causes shading, and reducing positive shading is an effective way that improves conversion efficiency of solar cell.The MWT crystal silicon solar energy battery is with respect to conventional batteries, and its emitter region and base electrode all are positioned at the back side of battery, and positive shading reduces, and short circuit current improves, and then improves the conversion efficiency of battery.In addition, MWT assembly electrode all is positioned at the back side, and the front need not to weld, and the assembly outward appearance is more attractive in appearance.Therefore, the research of MWT battery and assembly has become an emphasis direction of present stage photovoltaic industry.
Characteristics according to the MWT battery, there is research and development institution to develop special integrated backplane technology for the MWT battery, replace traditional solder technology, connect battery electrode and conductive backings by conducting resinl, but its exist cost high, yield poorly, can't carry out before the lamination defective such as EL test, can't realize the production of MWT component batch.The characteristics of MWT battery are that battery plus-negative plate all is distributed in cell backside, and for realizing best electric current collection effect, the battery main grid is evenly distributed on the battery, but this design can cause the MWT battery can't realize the straight line series welding.Therefore how to use the traditional components technology to carry out efficient MWT establishment of component, become a difficult problem of present photovoltaic industry.
Summary of the invention
Because the MWT battery plus-negative plate all is distributed in cell backside, if the MWT battery is realized the even distribution of front electrode, use conventional cell backside design, in MWT establishment of component process, can't carry out the straight line welding; Although and the distribution of electrodes of asymmetric can realize the straight line welding can causing the electric current collection weak effect, cause battery conversion efficiency to reduce.How the design of back side battery to be optimized to reach neither affects electric current collection, can realize that straight line welding is the technical problem to be solved in the present invention again.
The technical scheme that technical solution problem of the present invention adopts is: but the MWT cell backside structure of a kind of straight line welding, it is provided with through hole electrode, positive electrode, through hole and back of the body electric field, described through hole electrode comprises welding ends and conducting end, and described through hole is positioned on the through hole electrode conducting end and evenly and be symmetrically distributed on the cell piece.
As a kind of preferred, the conducting end of described through hole electrode intersects vertically into " T " font with welding ends, and it is asymmetric distribution on cell piece, and number is 9 ~ 25.
As a kind of preferred, described positive electrode asymmetric distribution on cell piece, number are 9 ~ 16.
As a kind of preferred, the length a of the conducting end of described through hole electrode is 3 ~ 6mm, and width b is 0.8 ~ 3mm; The length c of the welding ends of described through hole electrode is 2 ~ 5mm, and width d is 5 ~ 12.5mm.
As further preferred, the length a of the conducting end of described through hole electrode is 3.5mm, and width b is 1mm; The length c of the welding ends of described through hole electrode is 3.5mm, and width d is 7mm.
As a kind of preferred, the center line of positive electrode point-blank behind the center line of described through hole electrode welding ends and the cell piece Rotate 180 °.
But the invention provides a kind of MWT cell backside design of straight line welding, according to MWT battery characteristics, guaranteeing that through hole is under equally distributed prerequisite on the cell piece, the squared design that replaces the conventional batteries electrode, the battery through hole electrode is designed to " T " font, through hole is positioned at an end of " T " font electrode, by the asymmetric distribution of " T " font design realization welding electrode, by ° realization MWT assembly straight line welding of partition Rotate 180.
But through hole electrode shape of the present invention is not limited to " T " font, all reach straight line welding purpose all can, also can be " L " font, square, circular etc. such as its shape.
Advantage of the present invention is: ⑴ MWT battery through hole is evenly distributed at cell piece, guarantees the electric current collection best results; ⑵ increase back of the body field area as far as possible, through hole electrode is " T " font, and through hole end is positioned at the conducting end of " T " font through hole electrode, and welding ends asymmetric distribution on cell piece guarantees the welding of MWT assembly straight line.
Description of drawings
Fig. 1 is MWT cell backside design diagram.
Fig. 2 is MWT assembly straight line series welding schematic diagram.
Fig. 3 is MWT battery through hole electrode schematic diagram, is a-quadrant enlarged drawing among Fig. 1.
Among the figure, 1 is through hole electrode, and 2 is back electrode, and 3 is through hole, 4 are back of the body electric field, and 5 is welding, and 6 is the through hole electrode welding ends, and 7 is the through hole electrode conducting end, a is through hole electrode conducting end length, and b is through hole electrode conducting end width, and c is through hole electrode welding ends length, and d is through hole electrode welding ends width.
Embodiment
As shown in Figure 1, it comprises through hole 3, through hole electrode 1, back electrode 2 and back of the body electric field 4.Through hole electrode 1 comprises conducting end 7 and welding ends 6, and conducting end 7 intersects vertically into " T " font with welding ends 6, and conducting end 7 length a are 3.5mm, and width b is 1mm, and welding ends length c is 3.5mm, and width d is 7mm, sees accompanying drawing 3.Through hole 3 is symmetrical on cell piece, is positioned at conducting end 7.Welding ends 6 is parallel with back electrode 2, asymmetric distribution on cell piece, and the center line of back electrode 2 is realized the straight line welding by 180 ° of partition rotation cell pieces during components welding, referring to Fig. 2 point-blank behind the center line of welding ends 6 and the cell piece Rotate 180 °.
Claims (6)
1. but the MWT cell backside structure of straight line welding, it is characterized in that, be provided with through hole electrode, positive electrode, through hole and back of the body electric field, described through hole electrode comprises welding ends and conducting end, and described through hole is positioned on the through hole electrode conducting end and evenly and be symmetrically distributed on the cell piece.
2. but the MWT cell backside structure of straight line welding according to claim 1 is characterized in that the conducting end of described through hole electrode intersects vertically into " T " font with welding ends, and it is asymmetric distribution on cell piece, and number is 9 ~ 25.
3. but the MWT cell backside structure of straight line welding according to claim 1 is characterized in that described positive electrode asymmetric distribution on cell piece, number are 9 ~ 16.
4. but the MWT cell backside structure of straight line welding according to claim 2 is characterized in that the length a of the conducting end of described through hole electrode is 3 ~ 6mm, and width b is 0.8 ~ 3mm; The length c of the welding ends of described through hole electrode is 2 ~ 5mm, and width d is 5 ~ 12.5mm.
5. but the MWT cell backside structure of straight line welding according to claim 4 is characterized in that the length a of the conducting end of described through hole electrode is 3.5mm, and width b is 1mm; The length c of the welding ends of described through hole electrode is 3.5mm, and width d is 7mm.
6. but according to claim 1 to the MWT cell backside structure of the described straight line of 5 any one welding, it is characterized in that the center line of positive electrode point-blank behind described through hole electrode welding ends center line and the cell piece Rotate 180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102829753A CN103367470A (en) | 2013-07-08 | 2013-07-08 | Directly welded metal wrap trough (MWT) battery back structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102829753A CN103367470A (en) | 2013-07-08 | 2013-07-08 | Directly welded metal wrap trough (MWT) battery back structure |
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| CN103367470A true CN103367470A (en) | 2013-10-23 |
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| CN2013102829753A Pending CN103367470A (en) | 2013-07-08 | 2013-07-08 | Directly welded metal wrap trough (MWT) battery back structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8093675B2 (en) * | 2007-08-31 | 2012-01-10 | Sharp Kabushiki Kaisha | Photoelectric conversion element, photoelectric conversion element assembly and photoelectric conversion module |
| CN102709337A (en) * | 2012-04-27 | 2012-10-03 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell, solar module using back-contact solar cell and production method of solar module |
| CN102723380A (en) * | 2012-06-08 | 2012-10-10 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell module |
| CN203339175U (en) * | 2013-07-08 | 2013-12-11 | 浙江晶科能源有限公司 | MWT battery back side structure capable of being welded in linear manner |
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2013
- 2013-07-08 CN CN2013102829753A patent/CN103367470A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8093675B2 (en) * | 2007-08-31 | 2012-01-10 | Sharp Kabushiki Kaisha | Photoelectric conversion element, photoelectric conversion element assembly and photoelectric conversion module |
| CN102709337A (en) * | 2012-04-27 | 2012-10-03 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell, solar module using back-contact solar cell and production method of solar module |
| CN102723380A (en) * | 2012-06-08 | 2012-10-10 | 苏州阿特斯阳光电力科技有限公司 | Back-contact solar cell module |
| CN203339175U (en) * | 2013-07-08 | 2013-12-11 | 浙江晶科能源有限公司 | MWT battery back side structure capable of being welded in linear manner |
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Application publication date: 20131023 |