CN203690315U - Front-face grid metal electrode structure of solar cell - Google Patents
Front-face grid metal electrode structure of solar cell Download PDFInfo
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- CN203690315U CN203690315U CN201420085068.XU CN201420085068U CN203690315U CN 203690315 U CN203690315 U CN 203690315U CN 201420085068 U CN201420085068 U CN 201420085068U CN 203690315 U CN203690315 U CN 203690315U
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- Prior art keywords
- grid line
- solar cell
- metal electrode
- thin
- main grid
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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Abstract
The utility model discloses a front-face grid metal electrode structure of a solar cell. The structure includes a plurality of thin grid lines and main grid lines distributed on the front face of a silicon wafer uniformly. The thin grid lines are perpendicular to the main grid lines and thin grid line segments between two adjacent main grid lines are provided with break points. Two ends of all the thin grid line segments intersecting the same main grid line are connected together through a loop grid line. A technical problem of grid breakage or insufficient printing of the thin grid lines in a printing process can be solved and influence on current collection can be reduced. Compared with a traditional design of a front-face grid metal electrode structure of a solar cell, the solar cell rejection rate is reduced by adopting the structure provided by the utility model.
Description
Technical field
The utility model relates to a kind of front metal electrode of the grating structure of metal electrode of the grating structure, particularly a kind of solar cell of solar cell.
Background technology
Silicon solar cell is as emerging clean reproducible energy, because of its have directly solar energy is converted to electric energy, life-span long, safeguard that the advantage such as simple gets most of the attention, being wherein most widely used of crystal silicon solar energy battery.
At present, the novel solar cell being widely used, it comprises silicon chip, be provided with one deck silicon nitride film in the front of silicon chip, on above-mentioned silicon nitride film, be printed with front metal electrode of the grating, the aluminium back surface field that has aluminum slurry to form at the backside coating of silicon chip, the backplate that this aluminium back surface field is silicon chip.Wherein above-mentioned front metal electrode of the grating is made up of two to three main grid lines and many thin grid lines, above-mentioned main grid line intersects vertically and conducting mutually with thin grid line, but because thin grid line is whole list structure, therefore in printing process, once there is disconnected grid or the empty phenomenon that prints, the thin grid line of one whole piece just cannot form effective loop, and the in-fighting of electric current on battery increases, and the collection that has a strong impact on electric current is converged.
Utility model content
The purpose of this utility model is to provide a kind of thin grid line to collect the front metal electrode of the grating structure that converges the solar cell that current efficiency is high in order to solve above-mentioned the deficiencies in the prior art.
To achieve these goals, the front metal electrode of the grating structure of the designed solar cell of the utility model, comprise many thin grid lines and the main grid line that are distributed on front side of silicon wafer, above-mentioned thin grid line and main grid line intersect vertically mutually, and the thin grid line section between every adjacent two main grid lines is provided with the point of interruption, the two ends of all thin grid line section crossing with same main grid line are by a loop grid line connection in above-mentioned.
In order to reduce the shading-area of metal electrode to silicon chip, improve light energy source utilance, save cost simultaneously, described main grid line subsection setup, in series by least two sheet main grid line segments.
The front metal electrode of the grating structure of the solar cell that the utility model obtains, each thin grid line in its structure all adopts segmented design, wherein each thin grid line section only with crossing main grid line conducting, again many on same main grid line thin grid line sections are connected by a loop grid line, to make forming multiple separate loop grid line systems on the front of solar cell.Above-mentioned multiple loops grid line system is independent of each other, even therefore when disconnected grid or the empty phenomenon that prints appear in thin grid line certain local section in printing process, it can affect the efficiency that in this loop grid line system, electric current collection converges, and still can guarantee normal work with the disconnected grid of above-mentioned appearance or empty disjoint other loop grid line systems of thin grid line local section that print phenomenon.As can be seen here, the efficiency that the front metal electrode of the grating structure of the silicon chip providing in the utility model converges the electric current collection traditional design of comparing has obvious lifting, and the scrappage of solar cell also reduces greatly.And described main grid line subsection setup, in series by least two sheet main grid line segments, greatly reduce main grid line shared area on the crystal silicon chip plane of illumination, the consumption of silver slurry greatly reduces, improve the illuminating area on crystal silicon chip plane of illumination simultaneously, further provided cost savings, improved the energy utilization rate of the utility model to light source.
Accompanying drawing explanation
Fig. 1 is the structural representation of the front metal electrode of the grating structure of solar cell in embodiment 1;
The local enlarged diagram at A place in Fig. 2 Fig. 1;
Fig. 3 is the structural representation of the front metal electrode of the grating structure of solar cell in embodiment 2;
Fig. 4 is the local enlarged diagram at B place in Fig. 3.
In figure: main grid line 1, main grid line segment 11, thin grid line 2, thin grid line section 21, the point of interruption 22, loop grid line 3.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment 1:
As depicted in figs. 1 and 2, the front metal electrode of the grating structure of the solar cell that the present embodiment provides, comprise parallel many thin grid lines 2 and the three main grid lines 1 that are distributed on front side of silicon wafer, above-mentioned thin grid line 2 intersects vertically mutually with main grid line 1, and the thin grid line section 21 between every adjacent two main grid lines 1 is provided with the point of interruption 22, the two ends of all thin grid line section 21 crossing with same main grid line 1 connect by the same circuit grid line 3 in above-mentioned.
Embodiment 2:
The front metal electrode of the grating structure of the sun energy cell silicon chip that the present embodiment provides, its general structure is consistent with embodiment 1, but in order to reduce the shading-area of metal electrode to silicon chip, improve light energy source utilance, save cost simultaneously, as shown in Fig. 3 and Fig. 4, main grid line 1 subsection setup in the present embodiment, in series by least two sheet main grid line segments 11.
Claims (2)
1. the front metal electrode of the grating structure of a solar cell, comprise many thin grid lines (2) and the main grid line (1) that are distributed on front side of silicon wafer, the above-mentioned thin grid line (2) of its feature intersects vertically mutually with main grid line (1), and the thin grid line section (21) between every adjacent two main grid lines (1) is provided with the point of interruption (22), the two ends of all thin grid line section (21) crossing with same main grid line (1) are by loop grid line (3) connection in above-mentioned.
2. the front metal electrode of the grating structure of solar cell according to claim 1, is characterized in that: described main grid line (1) subsection setup, and in series by least two sheet main grid line segments (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420085068.XU CN203690315U (en) | 2014-02-27 | 2014-02-27 | Front-face grid metal electrode structure of solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420085068.XU CN203690315U (en) | 2014-02-27 | 2014-02-27 | Front-face grid metal electrode structure of solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203690315U true CN203690315U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420085068.XU Expired - Lifetime CN203690315U (en) | 2014-02-27 | 2014-02-27 | Front-face grid metal electrode structure of solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203690315U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872152A (en) * | 2014-02-27 | 2014-06-18 | 宁波日地太阳能电力有限公司 | Front grid metal electrode structure of solar battery |
-
2014
- 2014-02-27 CN CN201420085068.XU patent/CN203690315U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872152A (en) * | 2014-02-27 | 2014-06-18 | 宁波日地太阳能电力有限公司 | Front grid metal electrode structure of solar battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160725 Address after: Kaohsiung streets Beilun District 315803 in Zhejiang province Ningbo City Chen Shan Road No. 27 Building 1 room 01 (Ningbo East Asahi Solar Power Inc) Patentee after: Ningbo Asahi Solar Power Inc. Address before: Kaohsiung street Beilun District 315803 in Zhejiang province Ningbo City Shao Village No. 28 2-3 (Ningbo Solar Power Company Limited) Patentee before: NINGBO SUN EARTH SOLAR POWER Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: Kaohsiung streets Beilun District 315803 in Zhejiang province Ningbo City Chen Shan Road No. 9 Building 9, No. 1 Patentee after: NINGBO SUN EARTH EAST SOLAR CO.,LTD. Address before: Kaohsiung streets Beilun District 315803 in Zhejiang province Ningbo City Chen Shan Road No. 27 Building 1 room 01 (Ningbo East Asahi Solar Power Inc) Patentee before: Ningbo Asahi Solar Power Inc. |
|
| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315803 No. 1, Building 9, Chen Shan Road, Xiaogang Street, Beilun District, Ningbo City, Zhejiang Province Patentee after: Ningbo Dongxu Solar Power Co.,Ltd. Address before: 315803 No. 1, Building 9, Chen Shan Road, Xiaogang Street, Beilun District, Ningbo City, Zhejiang Province Patentee before: NINGBO SUN EARTH EAST SOLAR CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
|
| CX01 | Expiry of patent term |