High-reflection triangular metal wire preparation device for stacked gate assembly

Abstract

The utility model provides a high-reflection triangular metal wire preparation device for a stacked gate assembly, which sequentially comprises a take-up and pay-off device, a tension device, an evaporation device and a polishing device in the running direction of a metal wire, and the evaporation device is a vacuum evaporation coating device. Wherein the vacuum degree is gradually increased from an inlet to an evaporation chamber in the metal wire running direction, the vacuum evaporation coating device is provided with a wire feeding mechanism, the inlet of the vacuum evaporation coating device is provided with a low-vacuum-degree ion cleaning chamber, the evaporation chamber is internally provided with an evaporation boat and has a high vacuum degree, and the outlet of the vacuum evaporation coating device is provided with a low-vacuum chamber. The grinding device is located behind the evaporation device and grinds one face of the triangular metal wire so as to remove the coating film on the face and retain the coating films on the other two faces of the triangular metal wire. The device provided by the utility model adopts step-by-step vacuum coating, adopts a grinding method to remove a single-sided film and retain two-sided coating films, and can effectively improve the reflective effect of the surface of the metal wire.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a device for preparing high-reflection triangular metal wires for grid modules. Background Art

[0002] With the development of society, the ever-increasing demand for energy, and the growing awareness of environmental protection, new clean energy industries are emerging. Solar cells, as an important new clean energy source, are gaining increasing attention. Copper wire, a crucial component connecting solar cells in photovoltaic modules, reflects light from its surface, affecting not only the light absorption efficiency of the modules and, consequently, the module's photoelectric conversion efficiency, but also the overall appearance consistency of the module. Therefore, improving the surface reflectivity and reflective consistency of triangular wire used in modules is crucial. To achieve the goals of increasing the power generation efficiency, improving the module's appearance, and connecting the modules' cells, high requirements are placed on the wire. These wires must have a tinned surface on one side and high-reflectivity surfaces on both sides. The ratio of the reflectivity of both sides to a silver reference surface, as measured using a CX-40M optical microscope, must be greater than 0.85, and the difference in reflectivity at five random points must be less than 0.05. However, copper wire suffers from surface roughness, low surface reflectivity, and a high probability of diffuse reflection, making it difficult to meet these requirements. Therefore, a method for preparing highly reflective triangular conductive wire for photovoltaic modules is urgently needed. Utility Model Content

[0003] The purpose of the present invention is to provide a device for preparing high-reflection triangular metal wires for a grid assembly to meet the above-mentioned needs and solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A device for preparing highly reflective triangular metal wire for a stacked grid assembly, the device comprising a pay-off and reel-out device, a tension device, an evaporation device and a polishing device in sequence in the direction of metal wire operation; the evaporation device is a vacuum evaporation coating device, wherein the vacuum degree increases step by step from an inlet to an evaporation chamber in the direction of metal wire operation; the vacuum evaporation coating device comprises a wire feeding mechanism, the vacuum evaporation coating device comprises a low-vacuum ion cleaning chamber at the inlet, an evaporation boat in the evaporation chamber and a high vacuum degree, and a low-vacuum chamber at the outlet; the polishing device is located behind the evaporation device and polishes one surface of the triangular metal wire to remove the coating on the surface while retaining the coating on the other two surfaces of the triangular metal wire.

[0006] Preferably, a heating tube is further provided between the evaporation device and the polishing device.

[0007] Preferably, the tension device includes a tension gun and a tension sensor, and the tension sensor obtains the tension value and adjusts the running tension of the metal wire.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] The utility model adopts vacuum evaporation coating technology, and the vacuum coating equipment adopts step-by-step vacuum to achieve high vacuum evaporation requirements; a grinding method is adopted to remove the single-sided film and retain the coating on both sides, which can effectively improve the reflective effect of the metal wire surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model.

[0011] In the figure: 1. Tension gun; 2. Tension sensor; 3. Low vacuum ion cleaning chamber; 4. High vacuum chamber; 5. Low vacuum chamber; 6. Wire feeding mechanism; 7. Evaporation boat; 8. Heating tube; 9. Grinding wheel. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0013] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0015] The utility model discloses a device for preparing high-reflectivity triangular metal wire for use in moiré components. This device can improve the surface reflectivity of the triangular metal wire used in moiré components and reduce the diffuse reflection of light beams on the metal wire surface. This process can solve the problem of inconsistent reflective effects on the metal wire surface, which can cause color differences in the appearance of the produced components.

[0016] See also Figure 1 The device of the present invention includes several parts: a wire-reeling device, a tension device, an evaporation device, and a polishing device. The tension device includes a tension gun 1 and a tension sensor 2. The tension sensor obtains the tension value and adjusts the running tension of the metal wire; the evaporation device is a vacuum evaporation coating device, wherein the vacuum degree increases step by step from the entrance to the evaporation chamber in the running direction of the metal wire. The vacuum evaporation coating device has a wire feeding mechanism 6. The vacuum evaporation coating device has a low vacuum ion cleaning chamber 3 at the entrance. The evaporation chamber is a high vacuum chamber 4, which has an evaporation boat 7 with high vacuum degree in the middle and a low vacuum chamber 5 at the outlet. A heating tube 8 is provided after the evaporation device to perform heat treatment and solidification on the coating formed after the evaporation is completed. Thereafter, a grinding wheel 9 is provided as a polishing device to polish one surface of the triangular metal wire, remove the coating on the surface and retain the coating on the other two surfaces of the triangular metal wire.

[0017] The utility model can effectively improve the surface reflectivity of the triangular metal wire used in the grid assembly. The technical points are: 1. The vacuum evaporation coating technology is used to improve the reflective effect of the metal wire surface; 2. The vacuum coating equipment adopts step-by-step vacuum to achieve high vacuum evaporation requirements; 3. The grinding method is used to remove the single-sided film to achieve double-sided coating.

[0018] The metal wire used for coating is a high-precision, special-shaped (triangular) conductive wire manufactured through cold wire drawing. For example, a triangular copper wire with a side length of 0.12mm is vapor-deposited, and a film of aluminum or silver is formed on its surface. The wire passes from a pay-off device through a tensioning device, where it is adjusted to the appropriate tension before entering the vapor deposition equipment. The wire undergoes surface treatment in an ion cleaning mechanism in a low-vacuum chamber at the entrance of the vapor deposition equipment before entering the vapor deposition chamber.

[0019] The evaporation chamber is a high vacuum chamber with an evaporation boat. The evaporation principle is that the wire feeding mechanism transfers the evaporation target material to the evaporation chamber, and contacts with the evaporation boat. The evaporation boat melts the target material at high temperature and vaporizes it. The vaporized target atoms are deposited on the surface of the copper triangle wire to form a thin film. The step-by-step vacuum and ion cleaning technology is used to obtain high vacuum conditions and a smooth substrate surface under continuous evaporation, ensuring the consistency of the reflectivity and reflective effect of the surface of the evaporation wire.

[0020] After the film is formed, the metal wire is first heat-treated by a heating tube to improve the physical properties of the surface coating and ensure the tension and reflective properties of the surface coating. The heat-treated metal wire is then polished by a grinding mechanism to remove the coating on one side of the triangular metal wire while retaining the coating on the other two sides.

[0021] Nitrogen is used for protection in the vacuum chamber of the evaporation equipment. The evaporation process parameters are: low vacuum requirement 10 -1 ~5×10 -1 Pa, high vacuum requirement 10 -3 ~5×10 -2 Pa; evaporation speed 20-300m / min, ion cleaning voltage 500-600V, evaporation power 50-90%, wire feeding speed 0.1-0.5m / h, tension meter adjusted to 2-5N, grinding wheel grinding speed 60-100r / min, heating tube heating temperature 150-200℃. After adjusting the parameters, start the wire-reeling device first, and after the evaporation speed stabilizes, start the heating tube and grinding device to remove the single-sided film to achieve double-sided coating. The temperature of the heating tube should not be too high or too low. If it is higher than 200℃, it will affect the surface reflectivity of the wire. If the temperature is too low and the tension is too low, the film will not be removed completely. After the triangular metal wire is treated as described above, the ratio of the reflectivity of both sides to the silver reference plane is greater than 0.85, and the difference in the reflectivity ratio of the random five points is less than 0.05.

[0022] The highly reflective metal wire produced using the present invention has a triangular cross-section. This triangular wire can be deposited on both sides, increasing reflectivity and improving the reflective effect of the wire surface. The ratio of the reflectivity of both sides to a silver reference surface, measured using a CX-40M optical microscope, is greater than 0.85, and the difference in reflectivity ratios at five random points is less than 0.05. The vacuum deposition equipment used in the present invention achieves high vacuum through step-by-step vacuuming, enabling online continuous deposition and achieving higher efficiency.

[0023] As an alternative to the present invention, magnetron sputtering, electroplating, and plasma methods can also be used to achieve coating, but all three methods have problems such as expensive coating equipment, slow coating speed, and difficulty in achieving online continuous evaporation.

[0024] Anything not described in detail in the present invention is well known to those skilled in the art.

[0025] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for preparing high-reflection triangular metal wire for stacked moiré components, characterized in that: The device includes a wire-reeling and winding device, a tension device, an evaporation device and a grinding device in sequence in the direction of metal wire operation. The evaporation device is a vacuum evaporation coating device, wherein the vacuum degree increases step by step from the entrance to the evaporation chamber in the direction of metal wire operation. The vacuum evaporation coating device has a wire feeding mechanism, and the vacuum evaporation coating device has a low-vacuum ion cleaning chamber at the entrance, an evaporation boat with high vacuum in the evaporation chamber, and a low-vacuum chamber at the exit. The grinding device is located behind the evaporation device and grinds one surface of the triangular metal wire to remove the coating on the surface while retaining the coating on the other two surfaces of the triangular metal wire.

2. The device for preparing a high-reflection triangular metal wire for a moire assembly according to claim 1, wherein: A heating tube is also provided between the evaporation device and the polishing device.

3. The device for preparing a high-reflection triangular metal wire for a moiré assembly according to claim 1, wherein: The tension device includes a tension gun and a tension sensor. The tension sensor obtains the tension value and adjusts the running tension of the wire.

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