CN-119744030-B - Laser-induced production process and device for solar cell

CN119744030BCN 119744030 BCN119744030 BCN 119744030BCN-119744030-B

Abstract

The invention discloses a laser-induced production process and device for a solar cell, which comprises a machine body, wherein a transmission device, a laser-induced mechanism and a protection component are arranged on the machine body, the laser-induced mechanism comprises a laser irradiation box, a first sintering area, a second sintering area, a third sintering area and a fourth sintering area are arranged on the laser irradiation box, and electrode modules matched with the first sintering area, the second sintering area, the third sintering area and the fourth sintering area are arranged on the laser-induced mechanism. The laser-induced production process and the device for the solar cell can effectively reduce the temperature of the cell, reduce the thermal stress of the cell, prevent the cell from generating cracks and deformation, enhance the stability and the reliability of the photovoltaic panel in long-term use, simultaneously prevent floccules at the edge of the photovoltaic panel, remarkably improve the light absorption efficiency of the photovoltaic panel, enhance the power generation capability of the photovoltaic panel, and have positive significance for promoting the development of the photovoltaic industry.

Inventors

HAN YOUWEI
LIANG LICHENG
XUE FENG
LI MENGMENG

Assignees

中润新能源(徐州)有限公司
江苏龙恒新能源有限公司

Dates

Publication Date: 20260512
Application Date: 20241224

Claims (4)

1. The solar cell laser-induced production process adopts a laser-induced device to melt metal at the contact part of a grid and a silicon wafer on a cell, and is characterized by comprising the following steps of: S1, partitioning, namely adopting a laser-induced production device to produce, wherein the laser-induced production device is divided into a first sintering region, a second sintering region, a third sintering region and a fourth sintering region, and the second sintering region and the third sintering region are adjacent; s2, refining, namely arranging a first edge area and a second edge area on the first sintering area and the fourth sintering area respectively, and independently brushing slurry on grids on the first edge area and the second edge area; S3, manufacturing electrodes, namely brushing slurry on the battery pieces according to the process after zoning and thinning to obtain the battery pieces with the grids, and placing the battery pieces with the grids into a sintering furnace for sintering to obtain primary cured grids on the battery pieces with the grids; S4, laser sintering, namely arranging an electrode module corresponding to the first sintering area, the second sintering area, the third sintering area and the fourth sintering area on the laser induction mechanism, wherein the electrode module comprises a first electrode, a second electrode and a third electrode; wherein the second electrode is aligned with the solid state grids on the front surfaces of the second sintering region and the third sintering region, the first electrode and the fourth electrode are respectively aligned with the solid state grids on the front surfaces of the first sintering region and the fourth sintering region, and the electrode module further comprises a fourth electrode; S5, cooling, namely installing a protection module on the laser induction mechanism, and spraying protection gas to cool the battery piece after the laser induction mechanism sinters the battery plate; The number of the grids on the first edge area and the second edge area is 4-10.
2. The laser-induced manufacturing process of a solar cell according to claim 1, wherein the thickness of the grid paste in the second and third sintering regions is 20-30 μm, and the thickness of the grid paste in the first and second edge regions is 12-18 μm.
3. The solar cell laser-induced manufacturing process according to claim 2, wherein the thickness of the brushing slurry in the first edge region and the second edge region increases from the edge of the photovoltaic panel to the center of the photovoltaic panel.
4. The solar cell laser-induced production process according to claim 1, wherein when the laser beam on the laser-induced mechanism walks, the shielding gas moves and sprays on the laser sintering grid at the previous place along with the laser beam, and the sintering grid is cooled.

Description

Laser-induced production process and device for solar cell Technical Field The invention belongs to the technical field of solar cell laser-induced sintering, and particularly relates to a solar cell laser-induced production process and device. Background As the demand for clean energy increases, the photovoltaic industry is rapidly developing. In order to improve the photoelectric conversion efficiency of a photovoltaic panel, a laser induced sintering process is a mainstream production technique in the production of photovoltaic panels. The laser-induced sintering technology instantaneously melts the metal at the contact part of the grating and the silicon wafer through a high-energy laser beam to form a firm alloy junction, thereby obviously improving the contact performance of the electrode. The improvement not only reduces contact resistance, but also enhances current collection efficiency, so that the photoelectric conversion efficiency of the solar cell can be remarkably improved. Better electrode contact can reduce the loss of current in the transmission process, and more light can be effectively converted into electric energy. The method has important significance for reducing the cost of solar power generation and promoting the popularization of clean energy. In practical production, the laser sintering process has a non-negligible problem in the practical application process. The high energy concentration of the laser can cause local excessive temperature of the battery piece, and severe thermal stress is generated. Causing cracks or deformations in the silicon wafer and affecting the long-term stability and performance reliability of the photovoltaic panel. Especially at photovoltaic board edge portion, the intensity of battery piece becomes low, and flocculent anomaly appears more easily, causes the surface roughness, reduces light absorption efficiency, directly influences photovoltaic board's power generation ability. Currently, market competition is increasing, and the efficiency of photovoltaic panels has become one of the most important indicators for measuring the quality and market competitiveness of photovoltaic panels. How to effectively solve the defects brought by the laser sintering process and improve the production efficiency and the performance stability of the photovoltaic panel has become a key problem in the industry. Therefore, in view of the above technical problems, it is necessary to provide a laser-induced production process and apparatus for solar cells. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to provide a laser-induced production process and device for a solar cell, which can effectively reduce the temperature of a cell, reduce the thermal stress of the cell, prevent cracks and deformation from occurring in the cell, enhance the stability and reliability of a photovoltaic panel in long-term use, prevent floccules from occurring at the edge of the photovoltaic panel, remarkably improve the light absorption efficiency of the photovoltaic panel, enhance the power generation capability of the photovoltaic panel, and have positive significance in promoting the development of the photovoltaic industry. In order to achieve the above objective, according to one embodiment of the present invention, a laser-induced production process and an apparatus for solar cells are provided, wherein the laser-induced production process for solar cells is used for melting metals at contact positions between a grid and a silicon wafer on a cell, and comprises the following steps: S1, partitioning, namely adopting a laser-induced production device to produce, wherein the laser-induced production device is divided into a first sintering region, a second sintering region, a third sintering region and a fourth sintering region, and the second sintering region and the third sintering region are adjacent; S2, refining, namely respectively arranging a first edge area and a second edge area on the first sintering area and the fourth sintering area; S3, manufacturing electrodes, namely brushing slurry on the battery pieces according to the process after zoning and thinning to obtain the battery pieces with the grids, and placing the battery pieces with the grids into a sintering furnace for sintering to obtain primary cured grids on the battery pieces with the grids; S4, laser sintering, namely arranging an electrode module corresponding to the first sintering area, the second sintering area, the third sintering area and the fourth sintering area on the laser induction mechanism, wherein the electrode module comprises a first electrode, a second electrode and a third electrode; wherein the second e