A device for single-sided tin plating of a triangular conductive wire

Abstract

This invention provides a single-sided tin-coating device for triangular conductive wires, including a tin-spraying mechanism and a protective wheel assembly. The tin-spraying mechanism includes a tin pot, a molten tin pumping device, a nozzle, and a flow control valve. The protective wheel assembly includes two consecutively arranged V-grooved wheels. Two sides of the triangular conductive wire are inserted into the V-grooves of the V-grooves, exposing the tin-coating surface. The nozzle of the tin-spraying mechanism is located between the two consecutively arranged V-grooved wheels, facing the exposed tin-coating surface of the triangular conductive wire. Using this single-sided tin-coating device for triangular conductive wires, the thickness of the tin layer can be controlled, production efficiency and yield can be improved, and long-distance, non-overflowing, non-broken, and uniformly controllable tin layer thickness of the single-sided tin-coated triangular conductive wires can be produced, thereby greatly improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically a device for single-sided tin coating of triangular conductive wire. Background Technology

[0002] With global greenhouse gas emissions intensifying and climate change becoming increasingly severe, the international community's demand and pressure to reduce carbon emissions are growing year by year. Traditional fossil fuels face problems such as price fluctuations, resource depletion, and environmental pollution, making energy transition imperative. Solar energy, as a clean and renewable energy source, has broad application prospects, and photovoltaic power generation represents the ultimate direction for new energy in the long term. In the long run, due to its enormous potential, photovoltaic power generation will become the mainstay of the world's energy supply. Therefore, the production of photovoltaic modules is the most crucial link in photovoltaic power generation. How to improve the power generation efficiency of modules has always been a research topic for major manufacturers. Conductive wires, as the connection between cells, are constantly being updated and developed, resulting in various specifications and shapes of conductive wires, such as rectangular, circular, elliptical, and triangular conductive wires. Our company's triangular conductive wire is one such irregularly shaped metal wire. The triangular structure is more conducive to improving the power generation of solar cells. To increase emissivity and reduce production costs, we have adopted a single-sided tin spraying technology to achieve this goal. The key issues in single-sided tin spraying are controlling the thickness of the tin layer and production efficiency, thus requiring the development of a new type of tin spraying device. Utility Model Content

[0003] The purpose of this invention is to provide a novel single-sided tin spraying device for triangular conductive wires, so as to meet the requirements of single-sided tin spraying of triangular conductive wires and to control the thickness of the tin layer, production efficiency and yield.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A single-sided tinning device for a triangular conductive wire includes a tin spraying mechanism and a protective wheel assembly. The tin spraying mechanism includes a tin can, a molten tin pumping device, a nozzle, and a flow control valve. The protective wheel assembly includes two consecutively arranged V-grooves. Two sides of the triangular conductive wire are inserted into the V-grooves of the V-grooves, exposing the tin-coated surface. The nozzle of the tin spraying mechanism is located between the two consecutively arranged V-grooves, and the nozzle faces the exposed tin-coated surface of the triangular conductive wire.

[0005] In the above single-sided tin coating device for triangular conductive wires, the molten tin pumping device is a pressurizing device or molten tin pump installed in the tin pot.

[0006] Preferably, one of the two consecutively arranged V-grooves is a copper wheel, and the single-sided tin-coating device for the triangular conductive wire further includes a slip ring energizing device that contacts the copper wheel.

[0007] Preferably, the triangular conductive wire single-sided tin coating device further includes a precision displacement platform, and the nozzle of the tin spraying mechanism is located on the precision displacement platform, through which the position of the nozzle is adjusted.

[0008] Preferably, the protective wheel assembly includes, in addition to two consecutively arranged V-grooved wheels, one or more flat-grooved wheels and one or more independent V-grooved wheels.

[0009] More preferably, the flat groove wheel is located outside the two consecutive V-grooves, and the independent V-grooves are located outside the flat groove wheel. Among the series of V-grooves and flat groove wheels of the protection wheel group, the outermost independent V-grooves is an insulating wheel, and the consecutive V-grooves and flat groove wheels on both sides of the nozzle are spaced-apart conductive copper wheels and non-conductive insulating wheels.

[0010] Preferably, the single-sided tin-coating device for the triangular conductive wire further includes a nitrogen protection device, which provides a nitrogen protective atmosphere to the triangular conductive wire during tin coating.

[0011] More preferably, the nitrogen protection device includes a guide plate and a heating rod. The guide plate directs the incoming nitrogen to a triangular conductive wire, and the heating rod heats the nitrogen flowing toward the triangular conductive wire.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: The device of this invention solves the problem of single-sided tin plating of triangular conductive wires. Simultaneously, the use of a molten solder nozzle with a flow control valve effectively controls the thickness of the tin layer on one side of the triangular conductive wire, improving production efficiency and yield. The novel tin plating mechanism allows for single-sided tin plating of the triangular conductive wire, and the tin layer thickness is controlled between 0.1μm and 10μm by the tin plating valve. By combining the protective roller assembly and the novel tin plating mechanism, the production efficiency of the triangular conductive wire can be increased by accelerating the process according to capacity requirements. This invention also adds a heating system to the protective roller and nitrogen protection device, ensuring the ambient temperature during the tin plating step, thereby improving quality control and production efficiency in the tin plating process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a triangular conductive wire single-sided tin coating device according to the present invention.

[0014] Figure 2 This is a schematic diagram of the split structure of a triangular conductive wire single-sided tin coating device according to the present invention.

[0015] Figure 3 This is a schematic diagram of the protective wheel assembly and tin valve of the single-sided tinning device for triangular conductive wires according to this utility model.

[0016] Figure 4 This is a schematic diagram of the nitrogen protection device of a single-sided tin coating device for triangular conductive wires according to this utility model.

[0017] Figure 5 This is a schematic diagram of the tin-spraying valve used in the device of this utility model.

[0018] In the diagram: 1. Tin spraying mechanism; 2. Protective wheel assembly; 3. Precision displacement platform; 4. Nitrogen protection device; 5. Triangular conductive wire; 11. Nozzle; 12. Tin inlet pipe; 13. Tin valve; 14. Tin can; 15. Compressed air; 21. First V-groove wheel; 22. Second V-groove wheel; 23. First flat groove wheel; 24. Second flat groove wheel; 25. Independent V-groove wheel; 26. Slip ring; 41. Guide plate; 42. Heating rod; 43. Nitrogen inlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] 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," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] To meet the requirements of single-sided tin spraying of triangular conductive wires while controlling the tin layer thickness, production efficiency, and yield, this invention proposes a novel single-sided tin spraying device for triangular conductive wires. This device first protects two sides of the triangular conductive wire from tin contamination, then reacts the third side with tin to achieve single-sided tin spraying. Secondly, it requires precise control of the tin layer thickness during the process, maintaining it between 0.1μm and 10μm. Since component manufacturing requires a large number of conductive wires, production efficiency is crucial; therefore, this device must be able to produce the required qualified products at different solder wire speeds.

[0023] The following is a detailed description of the triangular conductive wire single-sided tin coating device of this utility model with reference to the accompanying drawings.

[0024] See Figures 1 to 3 The core components of this invention's single-sided tinning device for triangular conductive wires include a tin spraying mechanism 1 and a protective wheel assembly 2. The tin spraying mechanism includes a tin pot, a molten tin pumping device, a nozzle 11, and a flow control valve. The tin pot, the entire flow channel, and the nozzle are all heatable and temperature-controlled. Tin is placed in the tin pot and heated until it becomes molten. It is then pumped to the nozzle and sprayed onto the surface of the triangular conductive wire. The flow rate of the molten tin at the nozzle is controlled by the flow control valve. The molten tin pumping device can be a molten tin pump or a pressurizing device installed in the tin pot. In one embodiment, the tin spraying mechanism uses a commercially available tin spraying valve. The tin spraying valve is a piezoelectric valve that pressurizes the tin pot to allow molten tin to flow into the valve. The valve then sprays the molten tin onto the surface of the conductive wire. The diameter of the tin valve's outlet is determined by the side length of the conductive wire, and the amount of tin sprayed can be controlled by the tin valve controller. Figure 5 As shown, compressed air 15 is added to the solder pot 14, causing the molten solder to flow into the solder valve 13 through the solder inlet pipe 12. The solder valve controls the flow rate of the molten solder sprayed through the nozzle 11, thereby controlling the thickness of the solder layer on the solder coating surface. This solder spraying device is highly controllable and very stable, unaffected by temperature, vibration, etc. It has a wide controllable range, effectively controlling the thickness of the solder layer and the production speed, while better ensuring product stability and improving production efficiency.

[0025] The triangular conductive wire protection wheel assembly consists of flat grooved wheels and V-groove wheels arranged according to the wiring pattern, as detailed below. Figure 3 As shown, it includes two consecutively arranged V-grooves, namely the first V-grooves 21 and the second V-grooves 22. The V-grooves of the V-grooves conform to the interface shape of the triangular conductive wire, which effectively protects the other two faces of the conductive wire from tin contamination. The two faces of the triangular conductive wire 5 are inserted into the V-grooves of the V-grooves, exposing the tin-coated surface. The nozzle of the tin-spraying mechanism is located between the two consecutively arranged V-grooves, and the nozzle faces the exposed tin-coated surface of the triangular conductive wire.

[0026] As part of the protective wheel assembly, it also includes a first flat groove wheel 23 and a second flat groove wheel 24 located upstream of the first V-grooved wheel 21 and the second V-grooved wheel 22, and independent V-grooved wheels 25 located upstream and downstream of the flat groove wheels, thus forming a wheel assembly to stably transmit the triangular conductive wire. The triangular conductive wire is as follows: Figure 3 As shown, the rollers are arranged on the assembly, allowing them to enter the tinning process in a fixed posture and maintain tension. Preferably, one of the V-groove rollers adjacent to the tin spray valve nozzle is a copper roller, and the other V-groove roller or the next flat groove roller is also a copper roller. They are energized through the slip ring 26, causing the conductive wire between the two rollers to heat up. This allows for better evaporation of the pretreatment reagent and more effective bonding of the metal wire with tin.

[0027] Although the diagram only shows copper wheels and conductive slip rings arranged at intervals, it should be understood that the actual arrangement is not limited to this. For example, the copper wheels could also be a first V-groove wheel and a second V-groove wheel, or a first flat groove wheel and a second flat groove wheel, or a first flat groove wheel and a second V-groove wheel, or even independent V-groove wheels. The remaining wheels are insulating wheels.

[0028] The single-sided tin-coating device for the triangular conductive wire of this invention also includes a precision displacement platform 3. The nozzle of the tin spraying mechanism is adjusted in position through the precision displacement platform so as to better align with the tin-coating surface of the triangular conductive wire.

[0029] The present invention provides a single-sided tin coating device for triangular conductive wires, which also includes a nitrogen protection device 4. The nitrogen protection device provides a nitrogen protective atmosphere by introducing heated nitrogen into the closed working area of ​​the conductive wire during the tin coating process. In this way, the tin will not be oxidized due to the protection of the nitrogen, and the heated nitrogen will not lower the working temperature.

[0030] like Figure 4 As shown, the nitrogen protection device includes a guide plate 41 and a heating rod 42. The guide plate directs the nitrogen entering from the nitrogen inlet 43 to the tin-coated triangular conductive wire, and the heating rod heats the nitrogen flowing to the triangular conductive wire to maintain the temperature of the working environment.

[0031] The working process of the tin-coating device of this utility model is as follows: Figure 3 As shown, we first thread the pre-treated conductive wire into the wheel assembly, adjust the position of the tin spray valve nozzle, and then power on the copper wheel to heat it. The tin spray valve then operates, and nitrogen gas is heated and blown in, thus spraying a tin layer onto one side of the triangular conductive wire. By adjusting the tin spray valve, we control various parameters on the main board to achieve triangular conductive wires with different tin layer thicknesses.

[0032] The device of this invention solves the problem of single-sided tin plating of triangular conductive wires. Simultaneously, the tin spray nozzle with a flow control valve effectively controls the tin layer thickness of the triangular conductive wire on one side, improving production efficiency and yield. The novel tin plating mechanism allows for single-sided tin plating of the triangular conductive wire, and the tin layer thickness is controlled between 0.1μm and 10μm by the tin plating valve. By combining the protective wheel assembly and the novel tin plating mechanism, the production efficiency of the triangular conductive wire can be increased by accelerating the process according to capacity requirements. This invention also adds a heating system to the protective wheel and nitrogen protection device, ensuring the ambient temperature during the tin plating step, thereby improving quality control and increasing production efficiency.

[0033] The device of this invention solves the problems of controlling the tin layer thickness, production efficiency and yield of single-sided tin-plated triangular conductive wires, ensuring the production of long-distance, non-overflowing, non-broken tin, and uniformly controllable tin layer thickness single-sided tin-plated triangular conductive wires, thus greatly improving the production efficiency of tin-plated triangular conductive wires.

[0034] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0035] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for single-sided tin coating of a triangular conductive wire, characterized in that, The device includes a solder spraying mechanism and a protective wheel assembly. The solder spraying mechanism includes a solder pot, a solder liquid extraction device, a nozzle, and a flow control valve. The protective wheel assembly includes two consecutively arranged V-groove wheels. Two sides of the triangular conductive wire are inserted into the V-groove of the V-groove wheel, exposing the solder-coated surface. The nozzle of the solder spraying mechanism is located between the two consecutively arranged V-groove wheels, and the nozzle faces the exposed solder-coated surface of the triangular conductive wire.

2. The single-sided tin-coating device for triangular conductive wires as described in claim 1, characterized in that, A molten solder pumping device is a pressurizing device or molten solder pump installed in a molten solder pot.

3. The single-sided tin-coating device for triangular conductive wires as described in claim 1, characterized in that, One of the two consecutively arranged V-grooves is a copper wheel, and the single-sided tin-coating device for the triangular conductive wire also includes a slip ring energizing device that contacts the copper wheel.

4. The single-sided tin-coating device for triangular conductive wires as described in claim 1, characterized in that, The triangular conductive wire single-sided tin coating device also includes a precision displacement platform, and the nozzle of the tin spraying mechanism is located on the precision displacement platform, through which the position of the nozzle is adjusted.

5. The single-sided tin-coating device for triangular conductive wires as described in claim 1, characterized in that, In addition to two consecutively arranged V-grooved wheels, the protective wheel assembly also includes one or more flat-grooved wheels and one or more independent V-grooved wheels.

6. The single-sided tin-coating device for triangular conductive wires as described in claim 5, characterized in that, The flat groove wheel is located outside the two consecutive V-grooves, and the independent V-grooves are located outside the flat groove wheel. Among the series of V-grooves and flat groove wheels in the protection wheel group, the outermost independent V-grooves is an insulating wheel, and the consecutive V-grooves and flat groove wheels on both sides of the nozzle are spaced-apart conductive copper wheels and non-conductive insulating wheels.

7. The single-sided tin-coating device for triangular conductive wires as described in claim 1, characterized in that, The single-sided tin-coating device for the triangular conductive wire also includes a nitrogen protection device, which provides a nitrogen protective atmosphere to the triangular conductive wire during tin coating.

8. The single-sided tin-coating device for triangular conductive wires as described in claim 7, characterized in that, The nitrogen protection device includes a guide plate and a heating rod. The guide plate directs the incoming nitrogen to a triangular conductive wire, and the heating rod heats the nitrogen flowing towards the triangular conductive wire.

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