Novel solar cell laser synergy equipment

Abstract

The utility model relates to the technical field of solar cell processing equipment, and discloses novel solar cell laser synergy equipment, which comprises a laser workbench for bearing solar cells. A conductive assembly for pressing down and conducting a solar cell is mounted on the lateral upper side of the laser workbench, and a laser scanning piece is mounted on the upper side of the laser workbench; the side face of the laser workbench is further provided with a blowing device for cleaning the laser workbench face, the blowing device comprises a blowing pipe installed on the side face of the laser workbench, and a plurality of blowing holes are obliquely formed in the side, facing the laser workbench face, of the blowing pipe so that foreign matter can be obliquely blown out of the laser workbench face through the blowing holes. The novel solar cell laser synergistic equipment is simple in structure and convenient to operate, the improvement effect of hidden cracks, perforation or fragments of the cells after efficiency improvement processing is obvious, the yield of the cells is greatly improved, the workload of processing personnel can be effectively reduced, and the efficiency of efficiency improvement processing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell processing equipment, in particular to a novel solar cell laser efficiency enhancement device. Background Art

[0002] Laser efficiency enhancement equipment is a new type of equipment currently used in the photovoltaic industry to improve the efficiency of solar cells. After being processed by the laser efficiency enhancement equipment, the efficiency of solar cells will be significantly improved. The processing method of the laser efficiency enhancement equipment is: first transfer the solar cell (cell for short) to the designated metal table of the laser efficiency enhancement equipment; then press the probe down to the cell on the metal table, and apply external voltage to the cell through the probe; then use a specific laser to scan the cell, and improve the efficiency of the cell through the external voltage and laser; after the efficiency enhancement processing, the cell can be transferred to the unloading station, and the next cell is transferred to the metal table to perform efficiency enhancement processing on the next cell.

[0003] For each battery cell, the processing actions of probe pressing and laser scanning usually take several seconds (such as 2.5 seconds). And for different battery cells, such processing actions need to be repeated thousands of times. Therefore, in the process of performing the above-mentioned repeated efficiency-enhancing processing on different battery cells, foreign matter (such as fragments and residues after the battery cells are damaged, other particulate matter, etc.) will inevitably be generated on the metal table. Therefore, when other battery cells to be processed are transferred to the metal table, if these foreign matter happens to be at the bottom of the battery cells to be processed, the battery cells will be squeezed by the probe after being pressed down, which can easily cause hidden cracks, perforations or fragments of the battery cells (the battery cells themselves are fragile materials). Therefore, in order to reduce the problems of hidden cracks, perforations or fragments in the efficiency-enhancing processing of battery cells, it is usually necessary to manually wipe the metal table every hour to remove foreign matter, which will greatly increase the workload of the processing personnel and reduce the efficiency of the efficiency-enhancing processing.

[0004] In addition, for the existing laser settings for laser processing of silicon crystals, such as the laser provided by publication number CN219648942U for processing the surface of the crystal to make the surface of the crystal smooth, a high-pressure air blowing mechanism is provided to transport compressed air through a pipeline to the upper side of the silicon crystal, so as to perform high-pressure air blowing during the silicon crystal processing process to blow away the silicon crystal debris so as not to affect the effect of the silicon crystal processing; at the same time, using high-pressure air to blow the surface of the silicon crystal can also cool the silicon crystal and avoid damage to the silicon crystal to a certain extent.

[0005] However, the existing laser setting still has difficulty in clearing away the debris on the table directly below the silicon crystal because its high-pressure air purge mechanism delivers compressed air to the upper side of the silicon crystal. Therefore, if this high-pressure air purge mechanism is directly applied to the laser efficiency enhancement equipment, there will still be a small amount of debris directly below the silicon crystal. Therefore, during the efficiency enhancement process, the battery cell is still prone to hidden cracks, perforations or fragments after being pressed down by the probe. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a novel solar cell laser efficiency enhancement device.

[0007] Based on this, the utility model discloses a novel solar cell laser efficiency enhancement device, comprising a laser workbench carrying a solar cell; a conductive component for pressing down the solar cell to conduct electricity is installed on the upper side of the laser workbench, and a laser scanning component is installed on the upper side of the laser workbench;

[0008] A purging device for cleaning the laser work surface is also installed on the side of the laser work table. The purging device includes a purging tube installed on the side of the laser work table. A plurality of purging holes are obliquely opened on the side of the purging tube facing the laser work surface so as to obliquely blow foreign matter out of the laser work surface through the purging holes.

[0009] Preferably, the angle between the inclined purge direction of the purge hole and the side edge of the laser work surface on which the purge tube is installed is an acute angle.

[0010] Further preferably, the angle between the inclined purge direction of the purge hole and the side of the laser work surface on which the purge tube is installed is 45 degrees.

[0011] Preferably, a plurality of the purge holes are arranged in sequence and spaced apart along the length direction of the purge tube, and the length of the purge tube is greater than or equal to the length of the laser worktable.

[0012] Preferably, the purging device is a compressed air purging device.

[0013] Further preferably, the purging device further comprises a connecting pipe, one end of which is connected to the purging pipe, and the other end of which is externally connected to an air compressor.

[0014] Preferably, the conductive component includes a moving cylinder and a plurality of probes, and the moving cylinder drives the probes to press down or rise; the laser work surface is a conductive metal work surface, and the probes and the metal work surface are connected to an external power supply to provide voltage for the solar cell.

[0015] Further preferably, the number of the conductive components is two groups, and the two groups of conductive components are respectively installed on the upper left side and the upper right side of the laser workbench.

[0016] Preferably, a new type of solar cell laser efficiency enhancement equipment of the utility model is also equipped with a transmission mechanism extending from the front of the laser workbench to the rear of the laser workbench, so that the transmission mechanism can transmit the solar cell sheets to be processed to the laser workbench surface, and transmit the processed solar cell sheets out of the laser workbench.

[0017] Preferably, a novel solar cell laser efficiency enhancement device of the utility model further includes an electrical controller and a mounting bracket for mounting a laser workbench, a conductive component, a laser scanner and an electrical controller, wherein the electrical controller electrically controls the connection of the conductive component, the laser scanner and the purge device.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] The utility model discloses a novel solar cell laser efficiency enhancement device, in which a purge device including a purge tube is installed on the side of the laser workbench, and a plurality of purge holes are obliquely opened on the side of the purge tube facing the laser workbench, so that foreign matters (such as cell fragments, other particulate matter, etc.) on the laser workbench can be regularly obliquely purged out through the purge holes, thereby effectively removing foreign matters on the laser workbench, and further effectively avoiding the problems of hidden cracks, perforations or fragments of the cell during the efficiency enhancement process due to the compression of these foreign matters and the cell, thereby greatly improving the yield rate of the cell after the efficiency enhancement process. The novel solar cell laser efficiency enhancement device has a simple structure and is easy to operate; moreover, compared with manual removal of foreign matters, it can also effectively reduce the workload of processing personnel and improve the efficiency of efficiency enhancement processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a novel solar cell laser efficiency enhancement device of this embodiment.

[0021] Figure 2 for Figure 1 A partial enlarged view of a new type of solar cell laser efficiency enhancement device.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of a purge device of a novel solar cell laser efficiency enhancement device in this embodiment.

[0023] Description of the accompanying drawings: solar cell 1; mounting bracket 2; laser workbench 3; laser work table surface 31; transmission mechanism 4; conductive component 5; motion cylinder 51; probe 52; laser scanning component 6; purge device 7; purge pipe 71; purge hole 711; connecting pipe 72; electrical controller 8. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Example

[0026] A novel solar cell laser efficiency enhancement device of this embodiment, see Figure 1-2 , including a mounting bracket 2; a laser workbench 3, a conductive component 5, a laser scanning component 6 and an electrical controller 8 are installed on the mounting bracket 2.

[0027] In practice, the mounting bracket 2 is preferably an aluminum mounting bracket. Of course, in other examples of this embodiment, the mounting bracket 2 can also be made of other materials.

[0028] The laser workbench 3 is installed at the lower end of the mounting bracket 2 , and the laser workbench surface 31 is used to carry the solar cell 1 to achieve efficient processing of the solar cell 1 .

[0029] Furthermore, a new type of solar cell laser efficiency enhancement equipment in this embodiment is also equipped with a transmission mechanism 4 extending from the front of the laser workbench 3 to the rear of the laser workbench 3, so that the transmission mechanism 4 can transmit the solar cell 1 to be processed to the laser workbench surface 31, and transmit the processed solar cell 1 out of the laser workbench 3.

[0030] The conductive component 5 is installed on the side of the mounting bracket 2 and is located above the side of the laser workbench 3 for pressing down the solar cell 1 to conduct electricity and then applying voltage (such as applying reverse bias) to the solar cell 1 .

[0031] Specifically, the conductive component 5 includes a moving cylinder 51 and a plurality of probes 52, and the moving cylinder 51 drives the probes 52 to press down or rise, so that the probes 52 contact or stay away from the solar cell 1. The laser work surface 31 is a conductive metal work surface, and the probes 52 and the metal work surface are both connected to an external power supply to provide voltage for the solar cell 1.

[0032] In one example of the present embodiment, taking the application of reverse bias as an example, the probe 52 serves as a negative electrode to contact the front side of the solar cell 1 (i.e., the upper surface of the solar cell 1), and the metal work surface serves as a positive electrode to contact the back side of the solar cell 1 (i.e., the lower surface of the solar cell 1), and both the probe 52 and the metal work surface are connected to an external power supply; in this way, the external power supply can apply a reverse bias to the solar cell 1 through the probe 52 and the metal work surface.

[0033] In practice, the number of the conductive components 5 is preferably two groups, and the two groups of conductive components 5 are respectively located above the left side and the right side of the laser workbench 3. Of course, in other examples of this embodiment, if the processing effect is reduced and the cost is not considered, the number of the conductive components 5 can also be one group or more than two groups.

[0034] The laser scanning component 6 is installed on the upper end of the mounting bracket 2 , so the laser scanning component 6 is located above the laser workbench 3 .

[0035] In practice, the laser scanning component 6 includes a laser scanning head to perform laser scanning on the solar cell 1 on the laser work surface 31. Therefore, the solar cell 1 is processed efficiently by the voltage applied by the conductive component 5 and the laser scanning of the laser scanning component 6, so as to improve the photoelectric conversion efficiency of the solar cell 1.

[0036] In a new type of solar cell laser efficiency enhancement equipment of the present embodiment, a purge device 7 is also installed on the side of the laser workbench 3 to effectively clean the laser workbench surface 31 regularly and effectively remove foreign matter (such as cell fragments, other particulate matter, etc.) on the laser workbench surface 31, and effectively avoid these foreign matter and the cell being squeezed to cause hidden cracks, perforations or fragments in the cell during the efficiency enhancement process.

[0037] In this embodiment, the purging device 7 is preferably a compressed air purging device. Using compressed air as the purging material will not introduce other materials to contact the laser worktable 31, and will not produce secondary foreign matter, so it can ensure that the parameters and reliability of the efficiency-enhancing processing are not affected.

[0038] Specifically, see Figure 1-3 The purge device 7 includes a purge pipe 71 (such as Figure 2 As shown, the purge pipe 71 is installed on the left side of the laser workbench 3). Of course, in other examples of this embodiment, the purge pipe 71 can also be installed on the right side of the laser workbench 3. For cost considerations, for one laser workbench 3, only one purge device 7 is required.

[0039] See also Figure 2-3 The side of the purge tube 71 facing the laser work surface 31 is inclined with a plurality of purge holes 711 (such as Figure 3 As shown), the purge hole 711 can obliquely purge foreign matter out of the laser work surface 31 ( Figure 2 The direction indicated by the arrow is the inclined purge direction of the purge hole 711); the inclined purge is beneficial to blowing foreign matter out of the laser work surface 31, thereby improving the cleaning effect of the laser work surface 31.

[0040] Further, the purge device 7 also includes a connecting pipe 72 (such as Figure 3As shown in FIG. 1 , one end of the connecting pipe 72 is connected to the purge pipe 71, and the other end of the connecting pipe 72 is connected to an external air compressor. The compressed air is distributed to each purge hole 711 through the connecting pipe 72 and the purge pipe 71 in turn, and then obliquely purges the laser work surface 31 through the purge holes 711, thereby effectively cleaning the laser work surface 31.

[0041] In this embodiment, the power source of compressed air is an external air compressor, which is preferably a dry oil-free screw air compressor (such as Ingersoll Rand's dry oil-free screw air compressor model IRN37-300Kw).

[0042] In this embodiment, the angle between the inclined purge direction of the purge hole 711 and the side of the laser work surface 31 where the purge tube 71 is installed is an acute angle. More preferably, the angle between the inclined purge direction of the purge hole 711 and the side of the laser work surface 31 where the purge tube 71 is installed is 45 degrees. In this way, it is more conducive to blowing foreign matter out of the laser work surface 31, further improving the cleaning effect of the laser work surface 31, so as to effectively avoid the problem of hidden cracks, perforations or fragments in the battery cell during the efficiency improvement process, and further improve the yield rate of the battery cell after the efficiency improvement process.

[0043] In this embodiment, a plurality of purge holes 711 are arranged in sequence along the length direction of the purge tube 71, and the length of the purge tube 71 is greater than or equal to the length of the laser work table 31. In this way, it is more conducive to diffusing the compressed air through the plurality of purge holes 711 to the entire surface of the laser work table 3, further improving the cleaning effect, effectively avoiding the problem of hidden cracks, perforations or fragments of the battery cell during the efficiency improvement process, and further improving the yield rate of the battery cell after the efficiency improvement process.

[0044] In this embodiment, the electrical controller 8 electrically controls the connection of the conductive component 5, the laser scanning component 6 and the purging device 7 to control the normal operation of each component. For example, after 1 hour of efficiency improvement processing, the delivery of the solar cell 1 to the transmission mechanism 4 can be stopped. After there are no solar cells 1 on the laser work surface 31 and the transmission mechanism 4, the electrical controller 8 controls the conductive component 5 and the laser scanning component 6 to stop working, and controls the purging device 7 to work, so that the purging device 7 automatically purges the laser work surface 31 for 3 seconds. After cleaning the laser work surface 31, the next solar cell 1 can be delivered to the laser work surface 31, and this can be repeated.

[0045] The novel solar cell laser efficiency enhancement equipment of this embodiment has a simple structure and is easy to operate. It can significantly improve the hidden cracks, perforations or fragments of the cell after efficiency enhancement processing, and greatly improve the yield rate of the cell. Moreover, compared with manual removal of foreign matter, it can also effectively reduce the workload of the processing personnel and improve the efficiency of efficiency enhancement processing.

[0046] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0047] The technical solution provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A new type of solar cell laser efficiency enhancement equipment, characterized in that: It comprises a laser workbench for carrying solar cells; a conductive component for pressing down the solar cells for conducting electricity is installed on the upper side of the laser workbench, and a laser scanning component is installed on the upper side of the laser workbench; A purging device for cleaning the laser work surface is also installed on the side of the laser work table. The purging device includes a purging tube installed on the side of the laser work table. A plurality of purging holes are obliquely opened on the side of the purging tube facing the laser work surface so as to obliquely blow foreign matter out of the laser work surface through the purging holes.

2. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: The angle between the inclined purge direction of the purge hole and the side edge of the laser work table where the purge pipe is installed is an acute angle.

3. The novel solar cell laser efficiency enhancement device according to claim 2 is characterized in that: The angle between the inclined purge direction of the purge hole and the side edge of the laser work surface where the purge pipe is installed is 45 degrees.

4. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: The plurality of purge holes are arranged in sequence and at intervals along the length direction of the purge tube, and the length of the purge tube is greater than or equal to the length of the laser worktable.

5. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: The purging device is a compressed air purging device.

6. A novel solar cell laser efficiency enhancement device according to claim 1 or 5, characterized in that: The purging device also includes a connecting pipe, one end of which is connected to the purging pipe, and the other end of which is externally connected to an air compressor.

7. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: The conductive component includes a moving cylinder and a plurality of probes, and the moving cylinder drives the probes to be pressed down or raised; the laser work surface is a conductive metal work surface, and the probes and the metal work surface are connected to an external power supply to provide voltage for the solar cell.

8. A novel solar cell laser efficiency enhancement device according to claim 1 or 7, characterized in that: There are two groups of conductive components, which are respectively installed on the upper left side and the upper right side of the laser workbench.

9. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: A transmission mechanism extending from the front of the laser workbench to the rear of the laser workbench is also installed, so that the transmission mechanism can transmit the solar cell sheets to be processed to the laser workbench surface, and transmit the processed solar cell sheets out of the laser workbench.

10. The novel solar cell laser efficiency enhancement device according to claim 1 is characterized in that: It also includes an electrical controller and a mounting bracket for mounting a laser workbench, a conductive component, a laser scanning component and an electrical controller. The electrical controller electrically controls the connection between the conductive component, the laser scanning component and the purging device.

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