CN114284370A - Method for improving efficiency and reducing cost of PERC battery - Google Patents
Method for improving efficiency and reducing cost of PERC battery Download PDFInfo
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- CN114284370A CN114284370A CN202210015548.8A CN202210015548A CN114284370A CN 114284370 A CN114284370 A CN 114284370A CN 202210015548 A CN202210015548 A CN 202210015548A CN 114284370 A CN114284370 A CN 114284370A
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- front side
- perc
- improving
- positive electrode
- main grid
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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
- Y02E10/547—Monocrystalline silicon PV cells
Abstract
The invention relates to the technical field of a PERC (Positive electrode collector) cell, in particular to a method for improving the efficiency and reducing the cost of the PERC cell, wherein the front side of a PERC crystalline silicon solar cell comprises a positive electrode main grid and a front side fine grid, and the width of the positive electrode main grid is 0.4 mm. Compared with the prior art, the method can reduce the contact resistance of the front side and increase the light receiving area of the surface of the battery, thereby improving the filling factor and the short-circuit current, finally improving the conversion efficiency, and simultaneously reducing the silver paste loss of the front side so as to achieve the purposes of cost reduction and efficiency improvement.
Description
Technical Field
The invention belongs to the technical field of PERC batteries, and particularly relates to a method for improving the efficiency and reducing the cost of a PERC battery.
Background
The PERC (passivated emitter and back contact) technology is the most cost-effective efficiency improving means of the crystalline silicon solar cell in recent years, and has high compatibility with a conventional cell production line and low investment cost for the transformation of the production line. PERC technology is the mainstream battery technology in the future 3-5 years.
The main grid is used for converging and connecting in series, which is a key step in the production of the crystalline silicon solar cell, and a metallized electrode is prepared on the front surface of a silicon wafer by means of screen printing, sintering and the like of conductive paste, so that a photon-generated carrier is led out of the cell. At present, the wide width of a main grid in the industry reduces the light receiving area of the surface of a battery, and the silver paste loss is increased while the conversion efficiency is influenced.
The front printing mode of the double-sided battery is that firstly a positive electrode main grid is printed on a silk screen three-pass printer, and then a fine grid line is printed on a four-pass printer; the main grid part printed by the method is generally wider, the shading area is larger, the generated current is less, and the contact resistance has certain improvement space.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, designs a screen printing method, provides a method for improving the efficiency of a PERC battery and reducing the cost, effectively reduces the silver paste loss of the front side, reduces the contact resistance of the front side of the battery and increases the light receiving area of the front side, thereby improving the short-circuit current and the filling factor of the battery and finally increasing the conversion efficiency of the PERC battery.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for improving the efficiency and reducing the cost of a PERC crystalline silicon solar cell is disclosed, wherein the front side of the PERC crystalline silicon solar cell comprises a positive electrode main grid and a front side fine grid.
Preferably, the width of the positive electrode main grid is 0.38-0.42 mm.
Preferably, the width of the positive electrode main grid is 0.4 mm.
Compared with the prior art, the method can reduce the contact resistance of the front side and increase the light receiving area of the surface of the battery, thereby improving the filling factor and the short-circuit current, finally improving the conversion efficiency, and simultaneously reducing the silver paste loss of the front side so as to achieve the purposes of cost reduction and efficiency improvement.
Drawings
FIG. 1 is a schematic front view of a conventional PERC crystalline silicon solar cell;
fig. 2 is a schematic diagram of the front side of a novel double-sided PERC crystalline silicon solar cell corresponding to the method of the present invention.
Detailed Description
The present invention will be further described with reference to specific embodiments for making the objects, technical solutions and advantages of the present invention more apparent, but the present invention is not limited to these examples. It should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. The methods in the following examples are conventional in the art unless otherwise specified.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the front side of a conventional PERC crystalline silicon solar cell comprises two parts: a positive electrode main grid (width is 1mm) and a front fine grid part;
the positive electrode main grid mainly plays a role in welding and converging, the front fine grid part mainly plays a role in collecting current carriers on the surface of the battery, and due to the fact that the line width of the main grid line is wide, a part of light is shielded from entering the inside of the battery piece, and therefore battery short-circuit current is reduced, and finally the efficiency is influenced.
The invention is optimized aiming at the prior art, the front graph is shown in figure 2, and the graph mainly comprises two parts: positive electrode main grid (width 0.4mm), front fine grid part. The invention reduces the width of the main grid, the design can improve the light receiving area of the surface, and the metal resistance of the narrowed main grid line can be reduced, thereby improving the efficiency. Comparing the front graphs of fig. 1 and fig. 2, the battery conversion efficiency of the novel graph is improved by 0.1%, the silver paste loss of each battery is reduced by 0.006g/pcs, and the specific results are shown in table 1 below.
TABLE 1 Wet-weight comparison of Electrical Performance of conventional and novel patterns
The invention optimizes the main grid part in the prior art, reduces the shading area of the main grid part and the contact resistance of the main grid part on one hand, and reduces the silver paste loss on the other hand, thereby improving the short-circuit current and the filling factor, and finally obviously improving the battery conversion efficiency and reducing the (silver paste) cost.
The above embodiments are merely preferred embodiments of the present invention, and any simple modification, modification and substitution changes made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (3)
1. The method for improving the efficiency and reducing the cost of the PERC cell is characterized in that the front side of the PERC crystalline silicon solar cell comprises a positive electrode main grid and a front side fine grid.
2. The method of claim 1, wherein the width of the main grid of the positive electrode is 0.38-0.42 mm.
3. The method of claim 2, wherein the width of the positive electrode main grid is 0.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210015548.8A CN114284370A (en) | 2022-01-07 | 2022-01-07 | Method for improving efficiency and reducing cost of PERC battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210015548.8A CN114284370A (en) | 2022-01-07 | 2022-01-07 | Method for improving efficiency and reducing cost of PERC battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114284370A true CN114284370A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210015548.8A Pending CN114284370A (en) | 2022-01-07 | 2022-01-07 | Method for improving efficiency and reducing cost of PERC battery |
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| Country | Link |
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| CN (1) | CN114284370A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012432A1 (en) * | 2012-07-16 | 2014-01-23 | 杭州塞利仕科技有限公司 | Front-side electrode structure of solar cell sheet and fabrication method therefor |
| CN104218113A (en) * | 2014-09-15 | 2014-12-17 | 奥特斯维能源（太仓）有限公司 | N type PERC crystalline silicon solar cell and preparation method thereof |
| CN206040655U (en) * | 2016-09-20 | 2017-03-22 | 泰州中来光电科技有限公司 | Many main grids solar cell and subassembly and system |
| CN111682090A (en) * | 2020-06-17 | 2020-09-18 | 广东爱旭科技有限公司 | Preparation method of selective emitter solar cell and solar cell |
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2022
- 2022-01-07 CN CN202210015548.8A patent/CN114284370A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012432A1 (en) * | 2012-07-16 | 2014-01-23 | 杭州塞利仕科技有限公司 | Front-side electrode structure of solar cell sheet and fabrication method therefor |
| CN104218113A (en) * | 2014-09-15 | 2014-12-17 | 奥特斯维能源（太仓）有限公司 | N type PERC crystalline silicon solar cell and preparation method thereof |
| CN206040655U (en) * | 2016-09-20 | 2017-03-22 | 泰州中来光电科技有限公司 | Many main grids solar cell and subassembly and system |
| CN111682090A (en) * | 2020-06-17 | 2020-09-18 | 广东爱旭科技有限公司 | Preparation method of selective emitter solar cell and solar cell |
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