Photovoltaic welding strip adopting laser for deep coloring
Through laser depth coloring technology, the photovoltaic welding tape is burned by laser in hydrogen peroxide to form a black deep oxide layer, which solves the problem of high temperature damage caused by uneven infrared absorption during the welding process, and achieves a low-cost and uniform coloring effect, improving welding efficiency and appearance quality.
Patent Information
- Application Number
- CN202421213034.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the welding process, existing photovoltaic welding tapes have caused the battery cell to be too hot for too long due to uneven infrared absorption, which increases the probability of fracture and defects. At the same time, the traditional coloring method is inefficient, high cost and difficult to control color uniformity.
Laser depth coloring technology is used to laser burn the copper tape soaked in hydrogen peroxide to form a black deep oxide layer, which is tightly combined to achieve economical and firm coloration of photovoltaic welding tape.
It realizes low-cost and uniform coloring of photovoltaic welding tape, avoids high-temperature damage to the battery cell, improves welding efficiency and appearance quality, and has economic advantages.
Smart Images
Figure CN222602917U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic welding strip that is deeply colored by laser. Background Art
[0002] At present, photovoltaic ribbons are generally welded to solar cells by infrared welding. Due to the different rates of infrared absorption by cells and ribbons, the temperature rise of cells is often faster. Since the ribbons are silvery white and strongly reflect infrared rays, the cells are kept at high temperatures for too long. As silicon wafers become thinner, the thermal brittleness of cells becomes more and more significant, which easily leads to an increase in the probability of cracking and defects of cells. From the development trend of the color of photovoltaic ribbons, the silvery white photovoltaic ribbons affect the aesthetics of photovoltaic cells, especially in applications where solar panels are used as appearance functional components, such as the solar panels of shared bicycles. In order to make the solar panels appear To achieve consistent black color, the traditional process is to manually stick a black tape on the photovoltaic welding ribbon. The manual sticking method is not only inefficient, but also has poor consistency. In addition, the width of the tape is larger than the photovoltaic welding ribbon, resulting in a large shading area, which affects the conversion efficiency of the solar panel. Another method is to spray paint on the photovoltaic welding ribbon, but the paint is prone to overflow of the molten solder at the bottom to the outside of the coating during high-temperature welding, thereby causing color difference and affecting the quality image of the appearance. Another method is to electroplate, CVD or PVD color the photovoltaic welding ribbon, but these methods generally have the problem of high cost, color uniformity is difficult to control, and the process technology level required is also very high, and there is no economic advantage. Utility Model Content
[0003] In view of the deficiencies of the prior art, the present invention attempts to overcome the above defects, and thus the present invention provides a photovoltaic welding strip that is deeply colored by laser, which can economically and firmly color the photovoltaic welding strip.
[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a photovoltaic welding strip that uses laser deep coloring, including a strip body; the strip body is made of a copper strip, and the side of the copper strip that is welded to the solar cell is coated with a solder layer, and the side of the copper strip facing the sunlight is a deep oxidation layer formed by immersing in hydrogen peroxide and laser burning.
[0005] Furthermore, the copper strip has a thickness of 0.03-0.4 mm.
[0006] Furthermore, the thickness of the solder layer is 0.1-0.3 mm.
[0007] Furthermore, the copper strip has a width of 0.2-20 mm.
[0008] Furthermore, the thickness of the deep oxide layer is 10-100 microns.
[0009] Compared with the prior art, the utility model has the following beneficial effects:
[0010] The side of the copper strip facing the sun is immersed in hydrogen peroxide and laser burned to form a deep oxide layer. The deep oxide layer has a black appearance and is tightly bonded to the copper. This technical solution has low cost, uniform color, and economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 , a schematic cross-sectional view of the utility model.
[0012] In the figure: 1. Copper strip; 2. Solder layer; 3. Deep oxidation layer. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] The utility model provides a photovoltaic welding strip which adopts laser deep coloring, such as Figure 1 As shown, it includes a strip body; the strip body is made of a copper strip 1, and the side of the copper strip 1 to be welded to the solar cell is coated with a solder layer 2, and the side of the copper strip 1 facing the sun is a deep oxidation layer 3 formed by immersing in hydrogen peroxide and laser burning, the thickness of the copper strip 1 is 0.03-0.4 mm, the thickness of the solder layer 2 is 0.1-0.3 mm, the width of the copper strip 1 is 0.2-4 mm, and the thickness of the deep oxidation layer 3 is 10-100 μm.
[0015] Working principle: The side of the copper strip 1 facing the sun is immersed in hydrogen peroxide and laser burned to form a deep oxide layer 3. The deep oxide layer 3 has a black appearance and is tightly combined with copper. This technical solution has low cost, uniform color and economic advantages.
[0016] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A photovoltaic welding ribbon using laser deep coloring, characterized in that: The invention comprises a strip body; the strip body is made of a copper strip (1); the side of the copper strip (1) to be welded to a solar cell is coated with a solder layer (2); the side of the copper strip (1) facing the sunlight is a deep oxidation layer (3) formed by laser burning after immersion in hydrogen peroxide.
2. The photovoltaic welding strip using laser deep coloring according to claim 1, characterized in that: The thickness of the copper strip (1) is 0.03-0.4 mm.
3. The photovoltaic welding strip using laser deep coloring according to claim 1, characterized in that: The thickness of the solder layer (2) is 0.1-0.3 mm.
4. The photovoltaic welding strip using laser deep coloring according to claim 1, characterized in that: The width of the copper strip (1) is 0.2-20 mm.
5. The photovoltaic welding strip using laser deep coloring according to claim 1, characterized in that: The thickness of the deep oxidation layer (3) is 10-100 microns.