CN110148638A - A kind of printing process of the more main grid solar battery sheets of MBB - Google Patents
A kind of printing process of the more main grid solar battery sheets of MBB Download PDFInfo
- Publication number
- CN110148638A CN110148638A CN201910371050.3A CN201910371050A CN110148638A CN 110148638 A CN110148638 A CN 110148638A CN 201910371050 A CN201910371050 A CN 201910371050A CN 110148638 A CN110148638 A CN 110148638A
- Authority
- CN
- China
- Prior art keywords
- grid
- printing
- main grid
- mbb
- main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052709 silver Inorganic materials 0.000 claims abstract description 10
- 239000004332 silver Substances 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention relates to area of solar cell, and in particular to the printing of front battery figure is completed in a kind of printing process of the more main grid solar battery sheets of MBB by secondary printing, the secondary grid of the first printing first, the second printing second secondary grid and main grid or only prints main grid.By selecting the silver paste of low contact resistance under the premise of meeting small compound to print out the first secondary grid on silicon wafer, and the second secondary grid and main grid or main grid are responsible for conductive and not responsible contact and can select identical or different silver paste to fold the width of higher pair grid, on the basis of the electric conductivity for guaranteeing grid line and silicon wafer contact performance and grid line, the shading-area for reducing grid line improves the photoelectric conversion efficiency of battery.The silver paste of high-tensile strength can be selected when the second printing to print to meet the pulling force demand of the more main grid batteries of MBB.Simultaneously halftone and slurry can also be targetedly selected for the different characteristics of the first printing and the second printing.
Description
Technical field
The present invention relates to area of solar cell, and in particular to a kind of printing process of the more main grid solar battery sheets of MBB.
Background technique
Currently, the main grid quantity of solar battery sheet is generally 5, the quantity of battery main grid is The more the better.Main grid quantity
More, the distance between main grid is shorter, and the string resistance of thin grid is just smaller, and the fill factor of solar cell also just improves.But if
Only increase main grid quantity, keeps main grid width constant, the shading-area of the welding above main grid or main grid will increase, short circuit current
It can reduce.Fill factor and short circuit current in order to balance substitute flat traditional welding with more round fine copper wires, here it is
MBB (Multi Busbar) technology.
Circular copper wire is narrow and occlusion coefficient is small, and glass/sky can be reflected into greater obliquity by largely shining the light on copper wire
Vapor interface simultaneously reflects, to be back in battery again.And though copper wire is thin, higher than flat welding, sectional area is simultaneously
It is not reduced with width equal proportion, and quantity is more, conductive capability is even also better than 5 traditional root bead bands.To use fine copper wire
Instead of traditional welding, it is necessary to be redesigned to the main grid pattern of printing.New main grid pattern should facilitate alignment when welding,
It can guarantee and firmly contacted with copper wire again.Good main grid design also to reduce as far as possible plus additional shielded area.
The current front MBB battery figure uses single printing technology, is once printed main grid and thin grid by halftone
Silicon chip surface is brushed, to the more demanding of slurry and halftone.
Summary of the invention
In view of the deficiencies of the prior art, the present invention replaces existing single printing technology using secondary printing technology, passes through
The printing of secondary printing completion front battery figure.
In order to realize above-mentioned technical proposal, a kind of printing process of the more main grid solar battery sheets of MBB of the invention passes through
Secondary printing completes the printing of front battery figure, and steps are as follows:
1) the secondary grid of the first printing first；
2) second printing second secondary grid and main grid or main grid is only printed.
Further, by selecting the silver paste of low contact resistance under the premise of meeting small compound on silicon wafer in the step 1)
Print out the first secondary grid.
Compared with prior art, the invention has the following advantages that
One, have a wide range of application, be applicable to the process requirements of the more main grid batteries of MBB, can match such as SE, the techniques need such as two-sided
It asks；
Two, feasibility is high, does not need to increase process flow；
Three, the requirement of different main grid quantity can be met, main grid quantity can be changed according to process requirements；
Four, can according to demand, the first printing and the second printing select different halftone and slurry, for MBB battery
That problem second printing may be selected high-tensile strength slurry；
Five, the thin grid line that high depth-width ratio can be obtained by secondary printing reduces the shading-area of grid line, promotes battery and turns
Change efficiency.
Detailed description of the invention
Fig. 1 is the first printing schematic diagram of the embodiment of the present invention:
The second printing schematic diagram of Fig. 2 embodiment of the present invention.
Specific embodiment
For that can further appreciate that summary of the invention of the invention, feature and using effect, the following examples are hereby given, and cooperates
Detailed description are as follows for attached drawing:
Fig. 1 to Fig. 2 is please referred to, a kind of printing process of the more main grid solar battery sheets of MBB of the embodiment of the present invention passes through
Secondary printing complete the printing of front battery figure, the secondary grid of the first printing first, the secondary grid of the second printing second and main grid or
Only printing main grid.
The first secondary grid are printed out on silicon wafer by selecting under the premise of meeting small compound the silver paste of low contact resistance, and the
Second mate's grid and main grid or main grid, which are responsible for conductive and not responsible contact, can select identical or different silver paste to fold the width of higher pair grid
Degree guarantees that grid line on the basis of the electric conductivity of silicon wafer contact performance and grid line, reduces the shading-area of grid line, improves
The photoelectric conversion efficiency of battery.
The silver paste of high-tensile strength can be selected when the second printing to print to meet the drawing of the more main grid batteries of MBB
Power demand.Simultaneously halftone and slurry can also be targetedly selected for the different characteristics of the first printing and the second printing
Material.
Claims (4)
1. the printing of front battery figure is completed in a kind of printing process of the more main grid solar battery sheets of MBB by secondary printing,
It is characterized in that, steps are as follows:
1) the secondary grid of the first printing first；
2) second printing second secondary grid and main grid or main grid is only printed.
2. a kind of printing process of the more main grid solar battery sheets of MBB according to claim 1, which is characterized in that described
By selecting the silver paste of low contact resistance under the premise of meeting small compound to print out the first secondary grid on silicon wafer in step 1).
3. a kind of printing process of the more main grid solar battery sheets of MBB according to claim 1, which is characterized in that described
Identical silver paste is selected to fold the width of higher pair grid in step 2).
4. a kind of printing process of the more main grid solar battery sheets of MBB according to claim 1, which is characterized in that described
The silver paste of high-tensile strength is selected to print to meet the pulling force demand of the more main grid batteries of MBB in step 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371050.3A CN110148638A (en) | 2019-05-06 | 2019-05-06 | A kind of printing process of the more main grid solar battery sheets of MBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371050.3A CN110148638A (en) | 2019-05-06 | 2019-05-06 | A kind of printing process of the more main grid solar battery sheets of MBB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110148638A true CN110148638A (en) | 2019-08-20 |
Family
ID=67594690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910371050.3A Pending CN110148638A (en) | 2019-05-06 | 2019-05-06 | A kind of printing process of the more main grid solar battery sheets of MBB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110148638A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117335A (en) * | 2020-09-29 | 2020-12-22 | 江苏爱康能源研究院有限公司 | Method for printing welding points on MBB main gate of crystalline silicon heterojunction solar cell |
| CN113013294A (en) * | 2021-02-26 | 2021-06-22 | 江苏润阳悦达光伏科技有限公司 | HJT heterojunction battery based on repeated printing and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592706A (en) * | 2012-03-16 | 2012-07-18 | 上海交通大学 | Solar cell anode silver paste and preparation method thereof |
| CN102903419A (en) * | 2012-09-27 | 2013-01-30 | 广州市儒兴科技开发有限公司 | Silver paste at front of crystalline silicon solar cell |
| CN104576777A (en) * | 2014-12-31 | 2015-04-29 | 江苏顺风光电科技有限公司 | Novel electrode structure of silicon solar cell |
| CN106816203A (en) * | 2017-03-20 | 2017-06-09 | 北京市合众创能光电技术有限公司 | Crystal silicon solar energy battery high-tensile strength positive silver paste and preparation method thereof |
| CN109599456A (en) * | 2017-09-04 | 2019-04-09 | 通威太阳能（成都）有限公司 | A kind of preparation method of PERC secondary printing multicrystalline solar cells |
-
2019
- 2019-05-06 CN CN201910371050.3A patent/CN110148638A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592706A (en) * | 2012-03-16 | 2012-07-18 | 上海交通大学 | Solar cell anode silver paste and preparation method thereof |
| CN102903419A (en) * | 2012-09-27 | 2013-01-30 | 广州市儒兴科技开发有限公司 | Silver paste at front of crystalline silicon solar cell |
| CN104576777A (en) * | 2014-12-31 | 2015-04-29 | 江苏顺风光电科技有限公司 | Novel electrode structure of silicon solar cell |
| CN106816203A (en) * | 2017-03-20 | 2017-06-09 | 北京市合众创能光电技术有限公司 | Crystal silicon solar energy battery high-tensile strength positive silver paste and preparation method thereof |
| CN109599456A (en) * | 2017-09-04 | 2019-04-09 | 通威太阳能（成都）有限公司 | A kind of preparation method of PERC secondary printing multicrystalline solar cells |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117335A (en) * | 2020-09-29 | 2020-12-22 | 江苏爱康能源研究院有限公司 | Method for printing welding points on MBB main gate of crystalline silicon heterojunction solar cell |
| CN113013294A (en) * | 2021-02-26 | 2021-06-22 | 江苏润阳悦达光伏科技有限公司 | HJT heterojunction battery based on repeated printing and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190820 |
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| RJ01 | Rejection of invention patent application after publication |