Special-shaped conductive wire manufacturing device for stacked gate assembly

Abstract

The utility model provides a special-shaped conductive wire manufacturing device for a stacked gate assembly, which comprises a drawing die and a drawing device, the drawing device comprises a driving wheel, an original copper wire penetrates through the drawing die to wind the driving wheel, and the original copper wire penetrates through the die to be drawn to a target wire diameter under the action of the driving wheel to form a conductive wire. Wherein a roller pressurization module is arranged on one side of the driving wheel, the side face of the roller pressurization module makes contact with the wheel face on one side of the driving wheel, and the copper wire is clamped between the contact faces of the roller pressurization module and the wheel face of the driving wheel. By adopting the device disclosed by the utility model, during cold wire drawing, the large-diameter driving wheel is matched with the roller pressurizing module, so that a'slipping 'phenomenon caused by insufficient friction force between a triangular wire and the driving wheel can be avoided in the drawing process, and the problems that the triangular conductive wire is broken and cannot be continuously produced due to the'slipping' phenomenon are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell manufacturing, in particular to a device for manufacturing special-shaped conductive wires for stacked grid components. Background Art

[0002] As an important component for connecting solar cells in photovoltaic modules, the size and structure of the surface of the welding ribbon will not only affect the series resistance and effective light receiving area of ​​the photovoltaic module, but also affect the light absorption rate of the solar cell, and thus affect the output power of the photovoltaic module. At present, there are plans in the industry to replace the circular conductive wire with a triangular conductive wire to improve the light absorption rate of the module and improve the output efficiency of the module. However, the use of triangular conductive wire also puts forward strict requirements on the shape of the conductive wire (the minimum inscribed circle radius of the three vertex angles of the triangle is less than 10μm), so the production and application of triangular conductive wire has become the key to manufacturing high-power photovoltaic modules. At present, there are two production methods for the production of special-shaped (triangular) conductive wires: calendering and drawing. The production method of roller calendering has the disadvantages that the shape of the calendered triangular conductive wire does not meet the use requirements, the roller wears seriously, seriously endangers the service life, the calendering speed is low, and the production capacity is low. The production mode of drawing has the advantages of more accurate triangular conductive wire size, production speed up to 300m / min, and high production capacity. However, the use of traditional "tower wheel" drawing device to draw copper wire will cause wire breakage during the drawing process, resulting in the problem of unsustainable production. Therefore, it is necessary to develop a process and device for manufacturing special-shaped conductive wires suitable for stacked-grid photovoltaic modules. Summary of the invention

[0003] The utility model aims to provide a manufacturing process and device for special-shaped conductive wires used in grid-stacking photovoltaic modules, so as to solve the problem of wire breakage in traditional drawing production.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A device for manufacturing special-shaped conductive wires for stacked grid components comprises a drawing die and a drawing device, wherein the drawing device comprises a driving wheel, the original copper wire passes through the drawing die and is wound around the driving wheel, and is drawn through the die to a target wire diameter under the action of the driving wheel to form a conductive wire, wherein a roller boosting module is arranged on one side of the driving wheel, the side surface of the roller boosting module contacts the wheel surface of one side of the driving wheel, and the copper wire is clamped between the contact surface of the roller boosting module and the wheel surface of the driving wheel.

[0006] Preferably, the roller boosting module is a pneumatic roller boosting module.

[0007] Preferably, the driving device of the driving wheel is an adjustable speed motor.

[0008] Preferably, a wire taking-up device is also provided in the advancing direction of the conductive wire.

[0009] Preferably, a driven wheel is also arranged on one side of the driving wheel.

[0010] Preferably, a plurality of drawing dies are provided, and the apertures of the dies decrease successively from the copper wire entry direction to the copper wire withdrawal direction.

[0011] In a more preferred embodiment, ten triangular drawing dies are provided, wherein the side lengths of the ten triangular drawing dies are 0.10-0.30 mm and decrease successively, and the drawing force of each die does not exceed 2.0N.

[0012] In a more preferred solution, a tension device is provided between the driving wheel and the subsequent mold, and the tension device is used to adjust the speed coordination between the driving wheels of each mold.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model solves the problem of wire breakage caused by slipping during the drawing process of the special-shaped (triangular) conductive wire drawing device by using a roller booster module;

[0015] Furthermore, the production stability problem is solved, thus providing a guarantee for ensuring the molding accuracy;

[0016] The high-precision forming size problem of special-shaped (triangular) conductive wires is solved by using a multi-pass drawing die. The cold wire drawing forming process is combined with an improved manufacturing device to produce high-precision special-shaped (triangular) conductive wires. The extreme difference in the length of the three sides of the conductive wire is less than 3μm, and the minimum inscribed circle radius of the triangle vertex angle is less than 10μm.

[0017] The application of adjustable speed drive motor and pneumatic roller booster module ensures production accuracy and continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a device for manufacturing special-shaped conductive wires for stacked grid components.

[0019] In the figure: 1. Wire; 2. Driving wheel; 3. Driven wheel; 4. Tension device; 5. Front-end mold; 6. Back-end mold; 7. Roller booster module. DETAILED DESCRIPTION

[0020] 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.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1 The device of the utility model includes a drawing die part and a drawing device part.

[0024] In the drawing die part, the utility model adopts multiple dies, such as ten dies, to improve the drawing accuracy. The ten-die cold wire drawing process is adopted to prepare high-precision shaped conductive wires for stacked grid photovoltaic modules. The drawing process is stable and the conductive wire size accuracy is high. Specifically, the utility model adopts φ0.145mm silver-plated copper wire to pass through ten triangular drawing dies to prepare triangular conductive wires. The side lengths of the ten-die triangles are 0.11-0.30mm and decrease successively, and the drawing force of each die does not exceed 2.0N; the conductive wires thus drawn have high dimensional accuracy, the extreme difference of the three sides is less than 3μm, and the minimum inscribed circle radius of the triangle vertex angle is less than 10μm, which effectively reduces the shading area of ​​the conductive wire, thereby effectively improving efficiency.

[0025] The multi-pass drawing die can be arranged before the driving wheel 2, and after the driving wheel 2 drives the wire to reach the target wire diameter, it directly enters the wire taking-up device. Figure 1 As shown, they each have their own driving wheel 2, which drives the drawing of the front die 5, and the back die 6 is driven by its own driving wheel. In order to coordinate the speed consistency between the driving wheels of different dies, a tension device 4 is also provided between the driving wheel of the front die and the back die, and the tension device 4 avoids the difference in tension of the wire in different dies caused by inconsistent driving wheel speeds.

[0026] In the drawing device part, a drawing device with a speed-adjustable motor, a large-diameter driving wheel and a pneumatic roller booster module is used to manufacture triangular conductive wire, which solves the problem of conductive wire stalling and wire breakage caused by insufficient friction between the conductive wire and the driving wheel.

[0027] like Figure 1 As shown, after the wire 1 passes through the die, it is wound around the driving wheel 2 and the driven wheel 3 and passes through the tension device 4 to enter the subsequent die or the wire-receiving device. Since the conductive wire and the driving wheel may stall and break due to insufficient friction, a roller boosting module 7 is set on one side of the driving wheel 2. The conductive wire is pressed against the driving wheel 2 by the roller boosting module 7, thereby ensuring the friction between the conductive wire and the driving wheel 2, thereby solving the problem of stalling and breaking. Preferably, the speed of the driving wheel 2 and the pressure of the roller boosting module 7 are adjustable, thereby improving the drawing quality. The driving device of the driving wheel 2 adopts an adjustable motor, thereby facilitating the speed regulation of the driving wheel 2. The roller boosting module 7 is a pneumatic roller boosting module, which adopts a cylinder to adjust the pressing pressure of the boosting roller, thereby ensuring the friction between the conductive wire and the driving wheel 2.

[0028] The device of the utility model is used to produce high-precision special-shaped (triangular) conductive wire by cold wire drawing. The operation steps are as follows:

[0029] First, a silver-plated copper wire with a diameter of φ0.145 mm is passed through ten triangular drawing dies, wherein the side lengths of the ten triangular drawing dies are 0.11-0.30 mm and decrease in sequence, and the drawing force of each die does not exceed 2.0 N. For example, the side lengths of the ten triangular drawing dies are 0.210-0.220, 0.180-0.200, 0.170-0.180, 0.160-0.170, 0.150-0.160, 0.140-0.150, 0.130-0.140, 0.120-0.130, 0.110-0.120, 0.100-0.110mm; the specific threading and routing method is that the wire is released from the pay-off end through the die, and is wound around the active traction wheel and the driven wheel for three weeks. After the winding is completed, the wire passes through the tension wheel, and the operation is repeated to pass through ten dies in turn, and the wire-receiving device is connected to complete the threading; after the threading is completed, the air valve switch of the pneumatic roller booster module is turned on, and the roller resists the surface of the active traction wheel under the push of air pressure, tightens the wire, and increases the friction with the traction wheel. The friction provides the drawing force for the drawing process. The greater the friction, the more stable the drawing process; then the drawing lubricant is connected, and the adjustable motor is started. After the copper wire is drawn, it is rolled and shaped in the die. Preparation of triangular conductive wire. During the rolling and shaping, the conductive wire is heated and annealed in an electric heating mode and protected by nitrogen. The annealing voltage is 18.2V~28.4V and the current is 2.5A~3.8A. After this cold wire drawing process, a special-shaped (triangular) conductive wire for high-precision stacked grid components is prepared.

[0030] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0031] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the 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 manufacturing a special-shaped conductive wire for a stacked grid assembly, comprising a drawing die and a drawing device, wherein the drawing device comprises a driving wheel, the original copper wire passes through the die and is wound around the driving wheel, and under the action of the driving wheel, the original copper wire passes through the drawing die and is drawn to a target wire diameter to form a conductive wire, characterized in that: A roller supercharging module is arranged on one side of the driving wheel, the side surface of the roller supercharging module contacts the wheel surface on one side of the driving wheel, and the copper wire is clamped between the contact surface between the roller supercharging module and the wheel surface of the driving wheel.

2. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 1, characterized in that: The roller boosting module is a pneumatic roller boosting module.

3. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 1, characterized in that: The driving device of the driving wheel is a speed-adjustable motor.

4. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 1, characterized in that: A wire taking-up device is also provided in the advancing direction of the conductive wire.

5. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 1, characterized in that: A driven wheel is also arranged on one side of the driving wheel.

6. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 1, characterized in that: A plurality of drawing dies are provided, and the aperture of the dies decreases successively from the copper wire entry direction to the drawing direction.

7. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 6, characterized in that: Ten triangular drawing dies are provided, wherein the side lengths of the triangles of the ten drawing dies range from 0.10 to 0.30 mm and decrease successively, and the drawing force of each die does not exceed 2.0N.

8. The device for manufacturing special-shaped conductive wires for stacked grid components according to claim 6, characterized in that: A tension device is also provided between the driving wheel and the subsequent mold, and the tension device is used to adjust the speed coordination between the driving wheels of each mold.

Images