Solder strip unwinding device

Abstract

The utility model provides a solder strip unwinding device, which relates to the technical field of photovoltaic cell solder strip processing equipment and comprises a first unwinding module, a second unwinding module, a first redirection roller corresponding to the first unwinding module, a second redirection roller corresponding to the second unwinding module and a cache module. The first unwinding module and the second unwinding module each comprise a plurality of welding strip coil mounting positions, a plurality of grooves allowing welding strips to pass through are formed in the first redirection roller and the second redirection roller, and the grooves in the first redirection roller and the grooves in the second redirection roller are arranged in a staggered mode. The unwinding modules are distributed on the rack up and down, so that more welding strip coils can be put down in a limited space, 28 welding strips can be compatible, and the production requirement of a main-grid-free assembly is met.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell welding strip processing equipment, in particular to a welding strip unwinding device. Background Art

[0002] The busbar-free cell uses a welding ribbon to collect the fine grid current and realize the interconnection of cells. The width of the welding ribbon is smaller than the width of the traditional busbar. After the internal current of the crystalline silicon cell is formed, it is mainly conducted through the metal electrode. The metal electrode can be divided into the main grid and the fine grid. Metallization is a key step in the production process of solar cells. Photogenerated carriers must be effectively collected through the conductive electrode formed by metallization. The electrodes of the crystalline silicon cell include the main grid and the fine grid. The main grid is used for convergence and series connection, and the fine grid is used to collect photogenerated carriers. The main grid and the fine grid are distributed on the surface of the solar cell to collect and transmit the photogenerated current. The photogenerated current is collected by the fine grid. The main grid collects the current collected by the fine grid and conducts it to the cell through the welding ribbon and connects it with other cells. Finally, the welding ribbon is connected to the junction box to form a photovoltaic module product that can be used alone. Therefore, under the premise that the total width of the main grid is thinner and does not affect the utilization rate of light energy, the most intuitive effect of increasing the number of main grids is to shorten the path of the photogenerated current transmitted to the main grid line. The shorter the path of the current on the fine grid, the less power is consumed, and the overall power output of the corresponding component is higher. At the same time, the operating temperature of the component can be effectively reduced. At present, the battery string welding machine can meet the requirements of 20 welding ribbons at most, and the main grid-free technology requires the use of 28 welding ribbons at most. At the same time, because the same battery cell width covers more welding ribbons, the spacing between the welding ribbons is reduced, and the current structure cannot meet the requirements. In view of the above defects, this application is proposed. Utility Model Content

[0003] The utility model aims to provide a welding tape unwinding device, which solves the problem that the welding tape supply of the welding tape unwinding device at the current stage is difficult to meet the new process requirements of a larger number of welding tapes.

[0004] In order to solve the above problems, the utility model provides a welding tape unwinding device, including a first unwinding module, a second unwinding module, a first redirecting roller corresponding to the first unwinding module, a second redirecting roller corresponding to the second unwinding module and a cache module, the first unwinding module and the second unwinding module both include a plurality of welding tape roll installation positions, the first redirecting roller and the second redirecting roller are both provided with a plurality of grooves for the welding tape to pass through, the grooves on the first redirecting roller and the second redirecting roller are arranged alternately, and the unwound welding tape passes through the first redirecting roller and the second redirecting roller into the cache module.

[0005] According to one embodiment of the utility model, the cache module includes two groups of cache redirecting roller assemblies and two groups of cache wheel assemblies, the first redirecting roller and the second redirecting roller each correspond to one group of cache redirecting roller assemblies and cache wheel assemblies, and the two groups of welding strips are output on the same horizontal plane after passing through the cache module.

[0006] According to an embodiment of the utility model, the cache module further includes a lifting assembly, and the cache wheel assembly is installed on the lifting assembly.

[0007] According to an embodiment of the utility model, a cache U-shaped sensor is provided on the cache wheel assembly.

[0008] According to an embodiment of the utility model, a cache rebound block is provided on the cache wheel assembly.

[0009] According to an embodiment of the present invention, the first unwinding module and the second unwinding module are arranged in an upper and lower distributed manner on the frame.

[0010] According to an embodiment of the present invention, the first redirecting roller and the second redirecting roller are arranged one above the other on a vertical plane.

[0011] According to an embodiment of the utility model, twenty-eight groups of unwinding module installation positions are arranged on the frame.

[0012] According to an embodiment of the utility model, a pressure welding tape module is arranged at the output position after the welding tape passes through the buffer redirecting roller assembly.

[0013] According to an embodiment of the utility model, the lifting assembly is a linear guide slider.

[0014] The beneficial effect of the utility model is that by distributing the unwinding modules up and down on the frame, more soldering tape rolls can be placed in a limited space, and the cache redirection roller components are arranged front to back, the pulled soldering tapes are arranged in a staggered manner, and the spacing between the soldering tapes is small, which meets the layout requirements of subsequent modules, and the layout is reasonable, and the risk of cross-knotting between the soldering tapes is very small; it can meet the requirement of supplying more than 20 soldering tapes, and can be compatible with up to 28 soldering tapes, which meets the production requirements of components without main grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the welding strip unwinding device;

[0017] Figure 2 This is a partial structural diagram of the cache module. DETAILED DESCRIPTION

[0018] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0019] Embodiment 1:

[0020] A welding ribbon unwinding device, such as Figure 1 , including a first unwinding module 1, a second unwinding module 2, a first redirecting roller 5 corresponding to the first unwinding module 1, a second redirecting roller 6 corresponding to the second unwinding module 2, and a cache module 8. Specifically, the first unwinding module 1 and the second unwinding module 2 are both installed on a frame, and the first unwinding module 1 and the second unwinding module 2 both include a plurality of welding tape roll mounting positions (unwinding components), and the unwinding action is performed by a stepping motor. In this embodiment, twenty-eight groups of unwinding module mounting positions are arranged on the frame, 16 welding tape rolls can be arranged on the upper layer, and 12 welding tape rolls can be arranged on the lower layer. In other embodiments, different numbers of unwinding module mounting positions can be set according to actual needs. In this embodiment, Figure 1 The first unwinding module 1 and the second unwinding module 2 include a total of 24 welding tape roll installation positions, and four groups of unwinding module installation positions are vacant for later expansion. The first unwinding module 1 and the second unwinding module 2 are distributed up and down on the frame, with twelve groups of welding tape roll installation positions each. The frame is provided with an upper redirecting roller 3 and a lower redirecting roller 4 corresponding to the first unwinding module 1 and the second unwinding module 2 respectively.

[0021] The first redirecting roller 5 and the second redirecting roller 6 are arranged one above the other on a vertical plane. The first redirecting roller 5 and the second redirecting roller 6 are both provided with a plurality of grooves for the welding strips to pass through. The grooves on the first redirecting roller 5 and the second redirecting roller 6 are staggered with each other, that is, in the positive projection direction of the first redirecting roller 5 and the second redirecting roller 6, the grooves on the first redirecting roller 5 and the second redirecting roller 6 are staggered with each other, thereby achieving the goal of supplying more welding strips in a small space and with a small width, meeting the main grid-free battery process requirements, and the unwinding welding strip passes through the first redirecting roller 5 and the second redirecting roller 6 into the cache module 8.

[0022] like Figure 1 , 2The cache module 8 includes two groups of cache redirection roller assemblies 7 and two groups of cache wheel assemblies 8-3. The first redirection roller 5 and the second redirection roller 6 each correspond to one group of cache redirection roller assemblies 7 and cache wheel assemblies 8-3. The cache module 8 also includes a lifting assembly 8-2. The cache wheel assembly 8-3 is installed on the lifting assembly 8-2. The lifting assembly 8-2 can be a linear guide slider, a cylinder, etc. The two groups of welding strips are output on the same horizontal plane after passing through the cache module 8. Specifically, each group of the cache redirection roller assembly 7 is provided with two cache redirection rollers, such as Figure 1 , the upper layer from left to right is the cache redirection rollers No. 1, 2, and 3, and the lower layer is the cache redirection roller No. 4, wherein the cache redirection rollers No. 1 and 2 are a group, and the cache redirection rollers No. 3 and 4 are a group, and the cache redirection rollers No. 1 and 2 are set correspondingly to the first redirection roller 5, and the cache redirection rollers No. 3 and 4 are set correspondingly to the second redirection roller 6. Taking the first unwinding module 1 of the upper layer as an example, the welding ribbon unwinding steps are as follows: the welding ribbon passes through the upper redirection roller 3, the first redirection roller 5, the No. 1 cache redirection roller, the cache wheel assembly 8-3, and the No. 2 cache redirection roller, and then outputs. A pressing welding ribbon module 9 is set at the output position after the welding ribbon passes through the cache redirection roller assembly 7, and the two groups of output welding ribbons finally intersect and output at a plane.

[0023] Embodiment 2: On the basis of embodiment 1, a cache U-shaped sensor 8-1 is provided on the cache wheel assembly 8-3. A cache rebound block 8-4 is provided on the cache wheel assembly 8-3. After the soldering ribbon is pulled out, all components installed on the slider of the lifting assembly 8-2 rise. The U-shaped sensor 8-1 does not detect the sheet metal, the unwinding motor works to release the soldering ribbon, and all components descend until the unwinding motor stops working after the sensor sends a signal. A spring is installed above the cache rebound block 8-4. When the part rises rapidly, it will hit the spring component to quickly decelerate. The soldering ribbon and the cache wheel fit tightly to prevent the soldering ribbon from shaking violently inside the subsequent module. If this component is not provided, the cache wheel will continue to rise upward due to inertia after the front soldering ribbon pulling action stops and the soldering ribbon is detached, resulting in the soldering ribbon being unable to be tensioned and thus shaking violently.

[0024] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A welding ribbon unwinding device, characterized in that: The invention comprises a first unwinding module (1), a second unwinding module (2), a first redirecting roller (5) corresponding to the first unwinding module (1), a second redirecting roller (6) corresponding to the second unwinding module (2), and a buffer module (8); the first unwinding module (1) and the second unwinding module (2) both comprise a plurality of welding strip roll installation positions; the first redirecting roller (5) and the second redirecting roller (6) are both provided with a plurality of grooves for the welding strip to pass through; the grooves on the first redirecting roller (5) and the second redirecting roller (6) are arranged in an interlaced manner; the unwinding welding strip passes through the first redirecting roller (5) and the second redirecting roller (6) and enters the buffer module (8).

2. The welding tape unwinding device according to claim 1, characterized in that: The cache module (8) comprises two groups of cache redirecting roller assemblies (7) and two groups of cache wheel assemblies (8-3), the first redirecting roller (5) and the second redirecting roller (6) each corresponding to one group of cache redirecting roller assemblies (7) and cache wheel assemblies (8-3), and the two groups of welding strips are output on the same horizontal plane after passing through the cache module (8).

3. The welding tape unwinding device according to claim 2, characterized in that: The cache module (8) further comprises a lifting assembly (8-2), and the cache wheel assembly (8-3) is mounted on the lifting assembly (8-2).

4. The welding ribbon unwinding device according to claim 3, characterized in that: The cache wheel assembly (8-3) is provided with a cache U-shaped sensor (8-1).

5. The welding tape unwinding device according to claim 4, characterized in that: The cache wheel assembly (8-3) is provided with a cache rebound block (8-4).

6. The welding tape unwinding device according to any one of claims 1 to 4, characterized in that: The first unwinding module (1) and the second unwinding module (2) are arranged in an upper and lower distributed manner on the frame.

7. The welding ribbon unwinding device according to claim 6, characterized in that: The first redirecting roller (5) and the second redirecting roller (6) are arranged one above the other on a vertical plane.

8. The welding ribbon unwinding device according to claim 7, characterized in that: Twenty-eight groups of unwinding module installation positions are arranged on the frame.

9. The welding tape unwinding device according to any one of claims 1 to 4, characterized in that: A welding tape pressing module (9) is arranged at the output position of the welding tape after the welding tape passes through the buffer redirecting roller assembly (7).

10. The welding strip unwinding device according to any one of claims 3 to 5, characterized in that: The lifting component (8-2) is a linear guide slider.

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