CN102683437A - Solar cell electrode structure and solar cell series connection method - Google Patents
Solar cell electrode structure and solar cell series connection method Download PDFInfo
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- CN102683437A CN102683437A CN2011100747054A CN201110074705A CN102683437A CN 102683437 A CN102683437 A CN 102683437A CN 2011100747054 A CN2011100747054 A CN 2011100747054A CN 201110074705 A CN201110074705 A CN 201110074705A CN 102683437 A CN102683437 A CN 102683437A
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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
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Abstract
The invention relates to the field of crystalline silicon solar cells, and particularly discloses a solar cell electrode structure and a solar cell series connection method. The structure comprises a silicon wafer, and fine grid lines which are distributed on the front face of the silicon wafer in parallel, wherein the fine grid lines extend out of two edges of the silicon wafer to form a front electrode of a solar cell; the back face of the silicon wafer is provided with a back electrode; and a straight line where the back electrode is positioned is perpendicular to the straight lines where the fine grid lines are positioned. The series connection method of the solar cell comprises the following steps of: dividing the silicon wafer into two parts from the middle part in the direction of the back electrode; then lapping the front fine grid lines of a half of the cell on the back electrode of the other half of cell for welding; and performing similar steps to finish the connection of a positive electrode and a negative electrode to realize series connection of the cell. According to the solar cell electrode structure and the solar cell series connection method, the photoelectric conversion efficiency of the solar cell is effectively increased by combining the electrode structure and the series connection method.
Description
Technical field
The present invention relates to the crystal silicon solar energy battery field, particularly a kind of solar cel electrode structure and solar cell series connection method.
Background technology
Crystal-silicon solar cell is the solar cell of present main flow, and its production process is successively: go affected layer making herbs into wool, diffusion, dephosphorization silex glass, etching periphery, PECVD deposited silicon nitride passivated reflection reducing to penetrate film, silk screen printing positive and negative electrode, positive and negative electrode co-sintering.
Wherein silk screen printing is present main method for making its electrode; Printed silver slurry sintering forms front electrode, but the grid line that silk-screen forms is too wide, and gate electrode line has blocked light and reduced the absorption of solar cell to sunlight; As improving the manufacture method that technology patent CN201010148549.7 has provided a kind of front electrode; Be bonded in silicon chip surface to fine wire and obtain through oversintering with silver slurry, this method can be made thinner grid line, and has provided the scheme of removing battery front side main grid line; Reduced front electrode greatly to the blocking of sunlight, thereby increased the absorption of battery sunlight.
But because thin grid line is too thin, directly extraction electrode causes the series resistance of solar cell too big, is unfavorable for improving the photoelectric conversion efficiency of solar cell.
Summary of the invention
In order to improve the photoelectric conversion efficiency of solar cell, the object of the invention is to provide a kind of solar cel electrode structure and series connection method thereof.
To achieve these goals, the technical scheme of the present invention's employing is following:
A kind of solar cel electrode structure; Comprise silicon chip and the parallel positive thin grid line of said silicon chip that is distributed in; Said thin grid line extends the front electrode of the two edges formation solar cell of said silicon chip; In said silicon chip back a back electrode is set, said back electrode place straight line is vertical with said thin grid line place straight line.
In the said solar cel electrode structure, its back electrode is positioned at the center at the said silicon chip back side.
In the said solar cel electrode structure, said back electrode width is the 1-8 millimeter.
In the said solar cel electrode structure, its thin grid line is for to be bonded in the wire on the said silicon chip through electrocondution slurry.
In the said solar cel electrode structure, its silicon chip is monocrystalline silicon piece or polysilicon chip.
A kind of solar cell series connection method that adopts said solar cel electrode structure may further comprise the steps:
Said solar cel electrode structure is divided into two along the center line of its back electrode scratches, obtain the solar battery cell of two same structures;
The front electrode of first solar battery cell and the back electrode of second solar battery cell are welded together.
In the said solar cell series connection method, said welding comprises soldering, conducting resinl and conductive tape bonding.
The advantage of electrode structure of the present invention is to have cancelled front main grid line, has reduced and has blocked, and has increased the short circuit current of solar cell.The advantage of series connection method of the present invention is that electric current has reduced half on the thin grid line, and the length of thin grid line has also reduced half the, thereby has reduced the series resistance of photovoltaic cell.
Therefore, the present invention is through the photoelectric conversion efficiency of electrode structure and series connection method combination the raising effectively solar cell.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
Fig. 1 is the front electrode structural representation of solar cel electrode structure of the present invention;
Fig. 2 is the backplate structural representation of solar cel electrode structure of the present invention;
Fig. 3 is a solar cell tandem junction structure sketch map of the present invention.
Mark among the figure:
1, silicon chip 2, thin grid line
21, front electrode 3, back electrode
Embodiment
To combine accompanying drawing and specific embodiment to specify the present invention below, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
As depicted in figs. 1 and 2; Present embodiment discloses a kind of solar cel electrode structure; Comprise silicon chip 1 and the parallel thin grid line 2 that is distributed in silicon chip 1 front; Thin grid line 2 extends the front electrode 21 of the two edges formation solar cell of silicon chip 1, and a back electrode 3 is set at the back side of said silicon chip 1, and back electrode 3 place straight lines and thin grid line 2 place straight lines are vertical.Wherein, back electrode 3 is positioned at the center at silicon chip 1 back side, and its width is the 1-8 millimeter, and thin grid line 2 is for to be bonded in the wire on the silicon chip 1 through electrocondution slurry, and silicon chip 1 is monocrystalline silicon piece or polysilicon chip.
Need to prove, the back electrode among the present invention structure and shape be not limited to shown in Figure 2ly, for strengthening the distortion that back of the body contact is done, all be protection scope of the present invention.
Embodiment 2:
Present embodiment discloses a kind of making and solar cell series connection method of solar cel electrode structure, and wherein solar cel electrode structure fabrication step is following:
Many wire through the parallel silicon chip front that is bonded in of electrocondution slurry, are combined the two through oven dry, sintering again, and wire extends the front electrode of the two edges formation solar cell of silicon chip;
Form back electrode at the silicon chip back side through silk screen printing silver aluminium paste sintering, back electrode is positioned at center, the silicon chip back side and vertical with the thin grid line in front.
Wherein, solar cell series connection method step is following:
Said solar cel electrode structure is divided into two along the center line of its back electrode scratches, obtain the solar battery cell of two same structures;
The front electrode of first solar battery cell and the back electrode of second solar battery cell are welded together, and said welding comprises soldering, conducting resinl and conductive tape bonding.
Circulate above-mentioned two steps, the both positive and negative polarity that can accomplish a plurality of solar cells connects, and realizes the series connection of battery.
Through the solar cell that above method is made, cancelled front main grid line, reduced and blocked, increased the short circuit current of solar cell.The advantage of series connection method of the present invention is that electric current has reduced half on the thin grid line, and the length of thin grid line has also reduced half the, thereby has reduced the series resistance of photovoltaic cell.The present invention is through the photoelectric conversion efficiency of electrode structure and series connection method combination the raising effectively solar cell.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. a solar cel electrode structure comprises silicon chip and the parallel positive thin grid line of said silicon chip that is distributed in, and it is characterized in that:
Said thin grid line extends the front electrode of the two edges formation solar cell of said silicon chip;
In said silicon chip back a back electrode is set, said back electrode place straight line is vertical with said thin grid line place straight line.
2. solar cel electrode structure according to claim 1 is characterized in that:
Said back electrode is positioned at the center at the said silicon chip back side.
3. solar cel electrode structure according to claim 1 is characterized in that:
Said back electrode width is the 1-8 millimeter.
4. solar cel electrode structure according to claim 1 is characterized in that:
Said thin grid line is for to be bonded in the wire on the said silicon chip through electrocondution slurry.
5. solar cel electrode structure according to claim 1 is characterized in that:
Said silicon chip is monocrystalline silicon piece or polysilicon chip.
6. a solar cell series connection method that adopts the said solar cel electrode structure of claim 1 is characterized in that, may further comprise the steps:
Said solar cel electrode structure is divided into two along the center line of its back electrode scratches, obtain the solar battery cell of two same structures;
The front electrode of first solar battery cell and the back electrode of second solar battery cell are welded together.
7. solar cell series connection method according to claim 6 is characterized in that:
Said welding comprises soldering, conducting resinl and conductive tape bonding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100747054A CN102683437A (en) | 2011-03-18 | 2011-03-18 | Solar cell electrode structure and solar cell series connection method |
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| CN2011100747054A CN102683437A (en) | 2011-03-18 | 2011-03-18 | Solar cell electrode structure and solar cell series connection method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104835874A (en) * | 2014-09-05 | 2015-08-12 | 安阳高新区生产力促进中心 | Production method of half-cell photovoltaic assembly |
| CN105702807A (en) * | 2016-03-28 | 2016-06-22 | 泰州中来光电科技有限公司 | Preparation method and tandem connection method for solar cells, cells, assembly and system |
| CN105917472A (en) * | 2014-01-13 | 2016-08-31 | 光城公司 | High efficiency solar panel |
| WO2019114242A1 (en) * | 2017-12-15 | 2019-06-20 | 米亚索乐装备集成（福建）有限公司 | Flexible solar cell module |
| CN114975690A (en) * | 2022-06-15 | 2022-08-30 | 青海黄河上游水电开发有限责任公司西宁太阳能电力分公司 | IBC battery piece, IBC battery assembly and preparation method thereof |
| CN117410387A (en) * | 2023-12-15 | 2024-01-16 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
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| CN1147157A (en) * | 1995-06-28 | 1997-04-09 | 佳能株式会社 | Photovoltaic cell and method of making the same |
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| 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 |
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| CN105917472A (en) * | 2014-01-13 | 2016-08-31 | 光城公司 | High efficiency solar panel |
| CN105917472B (en) * | 2014-01-13 | 2018-11-09 | 光城公司 | High-efficiency solar panel |
| CN104835874A (en) * | 2014-09-05 | 2015-08-12 | 安阳高新区生产力促进中心 | Production method of half-cell photovoltaic assembly |
| CN104835874B (en) * | 2014-09-05 | 2017-06-20 | 安阳高新区生产力促进中心 | A kind of manufacture method of half-cell piece photovoltaic module |
| CN105702807A (en) * | 2016-03-28 | 2016-06-22 | 泰州中来光电科技有限公司 | Preparation method and tandem connection method for solar cells, cells, assembly and system |
| WO2019114242A1 (en) * | 2017-12-15 | 2019-06-20 | 米亚索乐装备集成（福建）有限公司 | Flexible solar cell module |
| CN114975690A (en) * | 2022-06-15 | 2022-08-30 | 青海黄河上游水电开发有限责任公司西宁太阳能电力分公司 | IBC battery piece, IBC battery assembly and preparation method thereof |
| CN114975690B (en) * | 2022-06-15 | 2024-04-26 | 青海黄河上游水电开发有限责任公司 | IBC battery piece, IBC battery assembly and preparation method of IBC battery assembly |
| CN117410387A (en) * | 2023-12-15 | 2024-01-16 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
| CN117410387B (en) * | 2023-12-15 | 2024-02-09 | 晶澜光电科技(江苏)有限公司 | Thin grid structure of crystalline silicon solar cell and preparation method thereof |
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Application publication date: 20120919 |