CN204243052U - A kind of solar cell interdigited electrode structure - Google Patents
A kind of solar cell interdigited electrode structure Download PDFInfo
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- CN204243052U CN204243052U CN201420589630.2U CN201420589630U CN204243052U CN 204243052 U CN204243052 U CN 204243052U CN 201420589630 U CN201420589630 U CN 201420589630U CN 204243052 U CN204243052 U CN 204243052U
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- main gate
- gate line
- grid line
- solar cell
- interdigited electrode
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- 238000003466 welding Methods 0.000 abstract description 7
- 238000009795 derivation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 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
- 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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Abstract
The utility model discloses a kind of solar cell interdigited electrode structure, 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.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.
Description
Technical field
The utility model relates to a kind of electrode structure of solar cell, specifically discloses a kind of solar cell interdigited electrode structure.
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
The purpose of this utility model designs for the above-mentioned defect of both positive and negative polarity existing for the solar cell of side, and the utility model 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 structure technology scheme of the present utility model 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.
The beneficial effects of the utility model are: a kind of solar cell interdigited electrode structure of the present utility model, 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 structure of the utility model embodiment 1;
Figure 4 shows that the cell piece cascaded structure schematic diagram of a kind of solar cell interdigited electrode of the utility model structure.
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 utility model better, describe the technical solution of the utility model in detail below in conjunction with accompanying drawing, but the utility model is not limited thereto.
Embodiment 1
A kind of solar cell interdigited electrode structure, 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 structure, 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 structure, 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 structure, 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 structure 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 structure 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 structure 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 structure 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 structure 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 structure 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 structure according to claim 1, it is characterized in that, secondary grid line width is 5-100 micron.
9. a kind of solar cell interdigited electrode structure 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 |
|---|---|---|---|
| CN201420589630.2U CN204243052U (en) | 2014-10-13 | 2014-10-13 | A kind of solar cell interdigited electrode structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420589630.2U CN204243052U (en) | 2014-10-13 | 2014-10-13 | A kind of solar cell interdigited electrode structure |
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| CN204243052U true CN204243052U (en) | 2015-04-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362190A (en) * | 2014-10-13 | 2015-02-18 | 山东力诺太阳能电力股份有限公司 | Interdigital electrode for solar cell |
| US10069019B2 (en) | 2014-10-31 | 2018-09-04 | Byd Company Limited | Solar cell unit, solar cell array, solar cell module and manufacturing method thereof |
| WO2021032328A1 (en) * | 2019-08-19 | 2021-02-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. | Photovoltaic solar cell and solar cell module |
| CN113471307A (en) * | 2021-07-27 | 2021-10-01 | 普乐新能源科技(徐州)有限公司 | Electrode pattern structure of IBC solar cell |
-
2014
- 2014-10-13 CN CN201420589630.2U patent/CN204243052U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362190A (en) * | 2014-10-13 | 2015-02-18 | 山东力诺太阳能电力股份有限公司 | Interdigital electrode for solar cell |
| US10069019B2 (en) | 2014-10-31 | 2018-09-04 | Byd Company Limited | Solar cell unit, solar cell array, solar cell module and manufacturing method thereof |
| US10193003B2 (en) | 2014-10-31 | 2019-01-29 | Byd Company Limited | Solar cell unit, solar cell array, solar cell module and manufacturing method thereof |
| US10381493B2 (en) | 2014-10-31 | 2019-08-13 | Byd Company Limited | Solar cell unit, solar cell array, solar cell module and manufacturing method thereof |
| US10529868B2 (en) | 2014-10-31 | 2020-01-07 | Byd Company Limited | Solar cell array, solar cell module and manufacturing method thereof |
| WO2021032328A1 (en) * | 2019-08-19 | 2021-02-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. | Photovoltaic solar cell and solar cell module |
| CN113471307A (en) * | 2021-07-27 | 2021-10-01 | 普乐新能源科技(徐州)有限公司 | Electrode pattern structure of IBC solar cell |
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Granted publication date: 20150401 Termination date: 20211013 |
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| CF01 | Termination of patent right due to non-payment of annual fee |