CN104362190B - Interdigital electrode for solar cell - Google Patents
Interdigital electrode for solar cell Download PDFInfo
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- CN104362190B CN104362190B CN201410537575.7A CN201410537575A CN104362190B CN 104362190 B CN104362190 B CN 104362190B CN 201410537575 A CN201410537575 A CN 201410537575A CN 104362190 B CN104362190 B CN 104362190B
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- main gate
- gate line
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- 238000003466 welding Methods 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Sustainable Energy (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
The invention discloses an interdigital electrode for a solar cell, which is arranged on the backlight surface of a solar cell sheet and consists of an anode and a cathode, wherein the anode and the cathode respectively consist of a main grid line and an auxiliary grid line; the auxiliary grid lines of the anode and the cathode are mutually parallel and are arranged at intervals. The structure can lead out the current of the solar cell in a balanced manner, is favorable for series-parallel connection between the cells, and can increase the welding tension of the electrode when being used on the back contact solar cell.
Description
Technical field
The present invention relates to a kind of electrode structure of solaode, specifically disclose a kind of solar cell interdigited electrode.
Background technology
The positive auxiliary electrode of tradition solar cell lays respectively at the two sides of solar cell, use the method printed respectively, specifically the method for designing of front electrode is as shown in Figure 1, using the many same sex electrodes (negative or positive electrode) design method of pattern in sun electrode the same side, this solar cell pattern cannot be used for back contacts solar cell.At back contacts solar cell, (such as Authorization Notice No. is CN 102185030 B;Structure described in the patent of CN 102185031) electrode pattern design in, chief and vice contact electrode due to solar cell is respectively positioned on the back side of solar cell, so the general electrode used as shown in Figure 2, this electrode structure is less owing to electrode picks out an area, the welding pulling force of electrode welding can be less, additionally must use the packaging technology differing from tradition solar module production line, relatively costly.
Summary of the invention
The purpose of the present invention is aiming at both positive and negative polarity and designs in the drawbacks described above existing for the solar cell of side, and the present invention can be compatible with conventional production lines, and cost is relatively low, meets the reliability testings such as welding pulling force.
A kind of solar cell interdigited electrode technical scheme of the present invention is, interdigited electrode is arranged on solar cell back bright finish, interdigited electrode is made up of positive pole and negative pole, positive pole and negative pole are made up of main gate line and secondary grid line the most respectively, main gate line is vertical with secondary grid line and is connected, and main gate line is formed by connecting by thin grid line by the thick grid line section of more than two；The secondary grid line of positive pole and negative pole is parallel to each other and spaced arrangement.
Positive pole main gate line is identical with the bar number of negative pole main gate line.
It is positioned at the thick grid line section of main gate line at solar battery sheet edge than the narrow width of the thick grid line section of other main gate line.
The thick grid line width of the main gate line being positioned at solar battery sheet edge is 0.05-2.4mm；The thick grid line width of other main gate line is 0.06-2.5mm.
Preferably, the thick grid line width of the main gate line being positioned at solar battery sheet edge is 2mm；The thick grid line width of other main gate line is 1.2mm.
The thin grid line width connected between the thick grid line section in main gate line is 5-100 micron.
Preferably, the thin grid line width connected between the thick grid line section in main gate line is 45 microns.
Secondary grid line width is 5-100 micron.
Negative or positive electrode main gate line is at least 2.
The invention have the benefit that a kind of solar cell interdigited electrode of the present invention, for back-contact heterojunction solar battery, (Authorization Notice No. is CN 102185030 B; CN
Structure described in the patent of 102185031) the back side, can improve efficiency 0.3% relative to traditional interdigited electrode, it main reason is that the optimization design of interdigited electrode, the passivation area of the backplate of increase, improve open-circuit voltage, and decrease series resistance.
The electric current deriving solar cell that this structure can balance, and beneficially connection in series-parallel between battery, utilize the welding pulling force that can increase electrode on back contacts solar cell.
Accompanying drawing illustrates:
Fig. 1 show the electrode structure at right side of tradition solar cell；
Fig. 2 show the electrode pattern design of back contacts solar cell in prior art；
Fig. 3 show the structural representation of a kind of solar cell interdigited electrode of the embodiment of the present invention 1；
Fig. 4 show the cell piece cascaded structure schematic diagram of the present invention a kind of solar cell interdigited electrode.
In figure, 1. solar battery sheet, 21. are positioned at the positive pole main gate line at solar battery sheet edge, 22. other positive pole main gate line, 23. positive pole pair grid lines, 31. other negative pole main gate line, 32. are positioned at the negative pole main gate line at solar battery sheet edge, 33. negative pole pair grid lines, 4. fool proof indicates, 5. welding, 6. thin grid line, 7. thick grid line section.
Detailed description of the invention:
In order to be more fully understood that the present invention, describe technical scheme below in conjunction with the accompanying drawings in detail, but the invention is not limited in this.
Embodiment 1
A kind of solar cell interdigited electrode, interdigited electrode is arranged on solar battery sheet 1, interdigited electrode is made up of positive pole and negative pole, positive pole and negative pole are made up of main gate line and secondary grid line the most respectively, main gate line is vertical with secondary grid line and is connected, and main gate line is formed by connecting by thin grid line 6 by the thick grid line section 7 of more than two；Positive pole pair grid line 23 and the parallel to each other and spaced arrangement of negative pole pair grid line 33.
Positive pole main gate line is two, and negative pole main gate line is two.Positive pole main gate line and negative pole main gate line are parallel to each other and equi-spaced apart distribution, i.e. be provided with a negative pole main gate line between two adjacent positive main gate line, be provided with a positive pole main gate line between two adjacent cathode main gate line.Concrete arrangement is followed successively by: is positioned at the negative pole main gate line 32 at solar battery sheet edge, other positive pole main gate line 22, other negative pole main gate line 31, is positioned at the positive pole main gate line 21 at solar battery sheet edge.
The thick grid line width of the positive pole main gate line 21 being positioned at solar battery sheet edge is 2mm；The thick grid line width of other positive pole main gate line 22 is 1.2mm.
The thick grid line width of the negative pole main gate line 32 being positioned at solar battery sheet edge is 2mm；The thick grid line width of other negative pole main gate line 31 is 1.2mm.
The thin grid line width connected between the thick grid line section in main gate line is 45 microns.
Secondary grid line width is 45 microns.
Do fool proof at certain position of solar battery sheet and indicate 4, in order to distinguish solar cell grid line string both positive and negative polarity, Figure of description Fig. 4 can be seen that this electrode design method can be easy to by welding 5 and solar cell is carried out connection in series-parallel.
At back-contact heterojunction solar battery, (Authorization Notice No. is CN 102185030 B; CN
Structure described in the patent of 102185031) the back side, can improve efficiency 0.3% relative to traditional interdigited electrode, it main reason is that the optimization design of interdigited electrode, the passivation area of the backplate of increase, improve open-circuit voltage, and decrease series resistance.
Embodiment 2
A kind of solar cell interdigited electrode, interdigited electrode is arranged on solar battery sheet 1, interdigited electrode is made up of positive pole and negative pole, positive pole and negative pole are made up of main gate line and secondary grid line the most respectively, main gate line is vertical with secondary grid line and is connected, and main gate line is formed by connecting by thin grid line 6 by the thick grid line section 7 of more than two；Positive pole pair grid line 23 and the parallel to each other and spaced arrangement of negative pole pair grid line 33.
Positive pole main gate line is three, and negative pole main gate line is three.Positive pole main gate line and negative pole main gate line are parallel to each other and equi-spaced apart distribution, i.e. be provided with a negative pole main gate line between two adjacent positive main gate line, be provided with a positive pole main gate line between two adjacent cathode main gate line.
The thick grid line width of the positive pole main gate line 21 being positioned at solar battery sheet edge is 1mm；The thick grid line width of other positive pole main gate line 22 is 0.6mm.
The thick grid line width of the negative pole main gate line 32 being positioned at solar battery sheet edge is 1mm；The thick grid line width of other negative pole main gate line 31 is 0.4mm.
The thin grid line width connected between the thick grid line section in main gate line is 20 microns.
Secondary grid line width is 15 microns.
Embodiment 3
A kind of solar cell interdigited electrode, interdigited electrode is arranged on solar battery sheet 1, interdigited electrode is made up of positive pole and negative pole, positive pole and negative pole are made up of main gate line and secondary grid line the most respectively, main gate line is vertical with secondary grid line and is connected, and main gate line is formed by connecting by thin grid line 6 by the thick grid line section 7 of more than two；Positive pole pair grid line 23 and the parallel to each other and spaced arrangement of negative pole pair grid line 33.
Positive pole main gate line is four, and negative pole main gate line is four.Positive pole main gate line and negative pole main gate line are parallel to each other and equi-spaced apart distribution, i.e. be provided with a negative pole main gate line between two adjacent positive main gate line, be provided with a positive pole main gate line between two adjacent cathode main gate line.
The thick grid line width of the positive pole main gate line 21 being positioned at solar battery sheet edge is 1.5mm；The thick grid line width of other positive pole main gate line 22 is 0.2mm.
The thick grid line width of the negative pole main gate line 32 being positioned at solar battery sheet edge is 1.5mm；The thick grid line width of other negative pole main gate line 31 is 0.2mm.
The thin grid line width connected between the thick grid line section in main gate line is 80 microns.
Secondary grid line width is 80 microns.
Claims (3)
1. a solar cell interdigited electrode, it is characterized in that, interdigited electrode is arranged on solar cell back bright finish, interdigited electrode is made up of positive pole and negative pole, positive pole and negative pole are made up of main gate line and secondary grid line the most respectively, main gate line is vertical with secondary grid line and is connected, and main gate line is formed by connecting by thin grid line by the thick grid line section of more than two；The secondary grid line of positive pole and negative pole is parallel to each other and spaced arrangement；
Positive pole main gate line is identical and spaced apart with the bar number of negative pole main gate line；
The thick grid line section of the main gate line being positioned at solar battery sheet edge is wider than the width of the thick grid line section of other main gate line；
The thick grid line width of the main gate line being positioned at solar battery sheet edge is 0.05-2.4mm；The thick grid line width of other main gate line is 0.06-2.5mm；
The thin grid line width connected between the thick grid line section in main gate line is 5-100 micron；
Secondary grid line width is 5-100 micron；
Negative or positive electrode main gate line is at least 2.
A kind of solar cell interdigited electrode the most according to claim 1, it is characterised in that the thick grid line width of the main gate line being positioned at solar battery sheet edge is 2mm；The thick grid line width of other main gate line is 1.2mm.
A kind of solar cell interdigited electrode the most according to claim 1, it is characterised in that the thin grid line width connected between the thick grid line section in main gate line is 45 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410537575.7A CN104362190B (en) | 2014-10-13 | 2014-10-13 | Interdigital electrode for solar cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410537575.7A CN104362190B (en) | 2014-10-13 | 2014-10-13 | Interdigital electrode for solar cell |
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| CN104362190A CN104362190A (en) | 2015-02-18 |
| CN104362190B true CN104362190B (en) | 2016-11-16 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428429B (en) * | 2015-11-12 | 2017-04-12 | 宁波尤利卡太阳能科技发展有限公司 | Solar cell back electrode structure |
| CN106653880A (en) * | 2017-01-22 | 2017-05-10 | 泰州乐叶光伏科技有限公司 | Electrode interconnection structure of IBC battery |
| CN108549921A (en) * | 2018-03-28 | 2018-09-18 | 深圳市傲科微创有限公司 | A kind of passive light label and light identification tag system |
| CN111029431A (en) * | 2019-12-11 | 2020-04-17 | 浙江爱旭太阳能科技有限公司 | Positive electrode grid line of solar cell and solar cell |
| CN212967720U (en) * | 2020-09-08 | 2021-04-13 | 东方日升（常州）新能源有限公司 | Solar cell metal electrode structure and battery pack |
| CN113659023B (en) * | 2021-07-06 | 2023-07-14 | 浙江爱旭太阳能科技有限公司 | Interdigital conductive back plate of IBC battery assembly and IBC battery assembly |
| CN118448481A (en) * | 2024-07-08 | 2024-08-06 | 杭州晶宝新能源科技有限公司 | Solar cell and preparation method thereof |
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| CN101976692A (en) * | 2010-07-28 | 2011-02-16 | 常州天合光能有限公司 | N type back contact battery |
| CN103208538A (en) * | 2013-03-20 | 2013-07-17 | 晶澳太阳能有限公司 | Manufacturing method of high-performance solar cell |
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| CN201838602U (en) * | 2010-10-19 | 2011-05-18 | 温州昌隆光伏科技有限公司 | Crystalline silicon solar battery with segmented grid lines |
| CN102738257A (en) * | 2012-06-15 | 2012-10-17 | 晶澳（扬州）太阳能科技有限公司 | Low-cost efficient solar cell electrode grid line structure |
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| CN101976692A (en) * | 2010-07-28 | 2011-02-16 | 常州天合光能有限公司 | N type back contact battery |
| CN103208538A (en) * | 2013-03-20 | 2013-07-17 | 晶澳太阳能有限公司 | Manufacturing method of high-performance solar cell |
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| CN104362190A (en) | 2015-02-18 |
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Effective date of registration: 20220513 Address after: 250000 lino wisdom, No. 30766, jingshidong Road, Jinan area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Patentee after: Shandong Linuo sunshine Power Technology Co.,Ltd. Address before: No.30766, East Jingshi Road, Licheng District, Jinan City, Shandong Province Patentee before: Shandong Linuo Solar Power Holdings Co.,Ltd. |
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