CN104362190A - Interdigital electrode for solar cell - Google Patents
Interdigital electrode for solar cell Download PDFInfo
- Publication number
- CN104362190A CN104362190A CN201410537575.7A CN201410537575A CN104362190A CN 104362190 A CN104362190 A CN 104362190A CN 201410537575 A CN201410537575 A CN 201410537575A CN 104362190 A CN104362190 A CN 104362190A
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- main gate
- gate line
- grid line
- solar cell
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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
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
-
- 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)
- Sustainable Development (AREA)
- 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)
- Electrodes Of Semiconductors (AREA)
- Photovoltaic Devices (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 solar cell, 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, what adopt is the method for printing respectively, specifically the method for designing of front electrode as shown in Figure 1, adopt the design method of pattern of many same sex electrodes (negative or positive electrode) in sun electrode the same side, this solar cell pattern can not 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 all positioned at the back side of solar cell, so the general electrode adopted as shown in Figure 2, this electrode structure is less because electrode picks out an area, the welding pulling force of electrode welding can be less, must use the packaging technology differing from traditional solar module production line in addition, cost is higher.
Summary of the invention
Object of the present invention designs for the above-mentioned defect of both positive and negative polarity existing for the solar cell of side, and the present invention can be compatible with conventional production lines, and cost is lower, 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 light face, 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 all respectively, main gate line is vertical with secondary grid line and be connected, and main gate line is formed by connecting by thin grid line by the thick grid line section of more than two; Parallel to each other and the spaced arrangement of the secondary grid line of positive pole and negative pole.
Positive pole main gate line is identical with the number of negative pole main gate line.
The thick grid line section being positioned at the main gate line at solar battery sheet edge is narrower than the width of the thick grid line section of other main gate line.
The thick grid line width being positioned at the main gate line 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 being positioned at the main gate line 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.
Beneficial effect of the present invention is: a kind of solar cell interdigited electrode of the present invention, and for back-contact heterojunction solar cell, (Authorization Notice No. is CN 102185030 B; Structure described in the patent of CN 102185031) the back side, can raise the efficiency 0.3% relative to traditional interdigited electrode, its main cause is the optimal design of interdigited electrode, the passivation area of the backplate of increase, improve open circuit voltage, and decrease series resistance.
The electric current of the derivation solar cell that this structure can balance, and be conducive to the connection in series-parallel between battery, utilize the welding pulling force that can increase electrode on back contacts solar cell.
accompanying drawing illustrates:
Figure 1 shows that the electrode structure at right side of traditional solar cell;
Figure 2 shows that the electrode pattern design of back contacts solar cell in prior art;
Figure 3 shows that the structural representation of a kind of solar cell interdigited electrode of the embodiment of the present invention 1;
Figure 4 shows that the cell piece cascaded structure schematic diagram of a kind of solar cell interdigited electrode of the present invention.
In figure, 1. solar battery sheet, the 21. positive pole main gate line being positioned at solar battery sheet edge, 22. other positive pole main gate line, the secondary grid line of 23. positive poles, 31. other negative pole main gate line, the 32. negative pole main gate line being positioned at solar battery sheet edge, the secondary grid lines of 33. negative poles, 4. fool proof indicates, 5. welding, 6. thin grid line, 7. thick grid line section.
embodiment:
In order to understand the present invention better, describe technical scheme of the present invention in detail below in conjunction with accompanying drawing, but the present invention is not limited thereto.
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 all respectively, main gate line is vertical with secondary grid line and be 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; The secondary grid line 23 of positive pole and the parallel to each other and spaced arrangement of the secondary grid line 33 of negative pole.
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 distributes, that is, be provided with a negative pole main gate line between two adjacent positive main gate line, are provided with a positive pole main gate line between two adjacent cathode main gate line.Concrete arrangement is followed successively by: be 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, be positioned at the positive pole main gate line 21 at solar battery sheet edge.
The thick grid line width being positioned at the positive pole main gate line 21 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 being positioned at the negative pole main gate line 32 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.
Doing 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, can find out that this electrode design method can carry out connection in series-parallel easily via welding 5 pairs of solar cells by Figure of description Fig. 4.
At back-contact heterojunction solar cell, (Authorization Notice No. is CN 102185030 B; Structure described in the patent of CN 102185031) the back side, can raise the efficiency 0.3% relative to traditional interdigited electrode, its main cause is the optimal 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 all respectively, main gate line is vertical with secondary grid line and be 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; The secondary grid line 23 of positive pole and the parallel to each other and spaced arrangement of the secondary grid line 33 of negative pole.
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 distributes, that is, be provided with a negative pole main gate line between two adjacent positive main gate line, are provided with a positive pole main gate line between two adjacent cathode main gate line.
The thick grid line width being positioned at the positive pole main gate line 21 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 being positioned at the negative pole main gate line 32 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 all respectively, main gate line is vertical with secondary grid line and be 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; The secondary grid line 23 of positive pole and the parallel to each other and spaced arrangement of the secondary grid line 33 of negative pole.
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 distributes, that is, be provided with a negative pole main gate line between two adjacent positive main gate line, are provided with a positive pole main gate line between two adjacent cathode main gate line.
The thick grid line width being positioned at the positive pole main gate line 21 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 being positioned at the negative pole main gate line 32 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 (9)
1. a solar cell interdigited electrode, it is characterized in that, interdigited electrode is arranged on solar cell back light face, 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 all respectively, main gate line is vertical with secondary grid line and be connected, and main gate line is formed by connecting by thin grid line by the thick grid line section of more than two; Parallel to each other and the spaced arrangement of the secondary grid line of positive pole and negative pole.
2. a kind of solar cell interdigited electrode according to claim 1, it is characterized in that, positive pole main gate line is identical with the number of negative pole main gate line and spaced apart.
3. a kind of solar cell interdigited electrode according to claim 1, is characterized in that, the thick grid line section being positioned at the main gate line at solar battery sheet edge is narrower than the width of the thick grid line section of other main gate line.
4. a kind of solar cell interdigited electrode according to claim 3, is characterized in that, the thick grid line width being positioned at the main gate line 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.
5. a kind of solar cell interdigited electrode according to claim 4, is characterized in that, the thick grid line width being positioned at the main gate line at solar battery sheet edge is 2mm; The thick grid line width of other main gate line is 1.2mm.
6. a kind of solar cell interdigited electrode according to claim 1, is characterized in that, the thin grid line width connected between the thick grid line section in main gate line is 5-100 micron.
7. a kind of solar cell interdigited electrode according to claim 6, is characterized in that, the thin grid line width connected between the thick grid line section in main gate line is 45 microns.
8. a kind of solar cell interdigited electrode according to claim 1, is characterized in that, secondary grid line width is 5-100 micron.
9. a kind of solar cell interdigited electrode according to claim 1, it is characterized in that, negative or positive electrode main gate line is at least 2.
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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| Publication Number | Publication Date |
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| CN104362190A true CN104362190A (en) | 2015-02-18 |
| CN104362190B CN104362190B (en) | 2016-11-16 |
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| CN201410537575.7A Active CN104362190B (en) | 2014-10-13 | 2014-10-13 | Interdigital electrode for solar cell |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428429A (en) * | 2015-11-12 | 2016-03-23 | 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 |
| CN113659023A (en) * | 2021-07-06 | 2021-11-16 | 浙江爱旭太阳能科技有限公司 | Interdigital conductive backboard of IBC battery pack and IBC battery pack |
| WO2022052692A1 (en) * | 2020-09-08 | 2022-03-17 | 东方日升（常州）新能源有限公司 | Solar battery metal electrode structure and battery assembly |
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| CN204243052U (en) * | 2014-10-13 | 2015-04-01 | 山东力诺太阳能电力股份有限公司 | A kind of solar cell interdigited electrode structure |
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2014
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| US20110041908A1 (en) * | 2007-12-11 | 2011-02-24 | Institut Für Solarenergieforschung Gmbh | Rear-contact solar cell having elongate, inter-digitated emitter and base regions on the rear side and method for producing the same |
| CN101976692A (en) * | 2010-07-28 | 2011-02-16 | 常州天合光能有限公司 | N type back contact battery |
| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428429A (en) * | 2015-11-12 | 2016-03-23 | 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 |
| WO2022052692A1 (en) * | 2020-09-08 | 2022-03-17 | 东方日升（常州）新能源有限公司 | Solar battery metal electrode structure and battery assembly |
| CN113659023A (en) * | 2021-07-06 | 2021-11-16 | 浙江爱旭太阳能科技有限公司 | Interdigital conductive backboard of IBC battery pack and IBC battery pack |
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| Publication number | Publication date |
|---|---|
| CN104362190B (en) | 2016-11-16 |
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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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