Laser scribing dust removal device for photovoltaic cells

Abstract

The utility model discloses a photovoltaic cell piece laser scribing dust removal device, which comprises a laser field lens, optical glass, an observation cover, an outer cover, an air pipe, an airflow regulating valve, a side air pipe, a suction opening and an observation window, the observation cover is connected above the outer cover in a sealing way, the optical glass is arranged on the observation cover, the laser field lens is arranged on the optical glass, and the outer cover is arranged on the outer cover. The observation windows are installed on the two sides of the observation cover, the air pipe and the side air pipes are installed on the side wall of the outer cover, the two sets of side air pipes are symmetrically arranged on the two sides of the outer cover, the air pipe and the side air pipes are each provided with an airflow adjusting valve, and the suction opening is connected with the other side wall, opposite to the air pipe, of the outer cover. Through a parallel airflow mode, dust generated by scribing is rapidly separated from a battery piece, the scribing effect is prevented from being affected, a laser light path is prevented from being blocked, the dust is effectively removed, the laser machining quality is improved, the efficiency of the photovoltaic battery piece is guaranteed, the structure is simple, installation is convenient, the dust removal device is of a fixed form, and the safety of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic equipment, and in particular to a laser scribing dust removal device for photovoltaic cells. Background Technology

[0002] Currently, the photovoltaic industry mainly uses ultrafast nanosecond lasers and picosecond lasers for laser scribing of photovoltaic cells. The dust particles generated by this type of laser processing are tiny. These tiny dust particles can easily float above the scribing photovoltaic cells, blocking the laser beam path and affecting the scribing effect. Furthermore, the tiny dust particles can fall into the scribing area of ​​the cells, affecting the cell's efficiency.

[0003] In existing technologies, the methods for handling dust generated during laser processing of photovoltaic cells are: 1. Using two crossflow fans located on both sides of the laser movement direction and perpendicular to the scribing direction; 2. Using a dust removal device that moves with the laser head. The common method of using two crossflow fans, one blowing air and the other extracting air, generates airflow that causes dust turbulence, making it difficult to remove quickly and affecting the laser processing optical path. Alternatively, the dust removal device moves with the laser head, with the laser head positioned under the product, the air blowing port located on the side of the processing surface, and the dust extraction port located above the device on the top of the product. This method involves high air pressure, the dust extraction port being close to the battery, a lack of equipment safety, and a complex structure. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a laser scribing dust removal device for photovoltaic cells that effectively removes dust, improves laser processing quality, and ensures the efficiency of photovoltaic cells.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a laser scribing and dust removal device for photovoltaic cells, including a laser field lens, optical glass, an observation cover, an outer cover, a duct, an airflow regulating valve, a side duct, an exhaust port, and an observation window. The observation cover is sealed and connected to the top of the outer cover. The optical glass is set on the observation cover, and the laser field lens is set on the optical glass. The observation windows are installed on both sides of the observation cover. The duct and the side duct are installed on the side wall of the outer cover. There are two sets of side ducts, symmetrically arranged on both sides of the outer cover. An airflow regulating valve is installed on the duct and the side duct respectively. The exhaust port is connected to the other side wall of the outer cover opposite the position of the duct.

[0006] Furthermore, the entire device is installed approximately 10mm above the photovoltaic cells and centered on them.

[0007] Furthermore, the scribing direction of the photovoltaic cell is parallel to the installation direction of the exhaust vent and side duct, and perpendicular to the installation direction of the duct.

[0008] Furthermore, the airflow direction of the duct is consistent with the scribing direction and is inclined downward at an angle to the processed surface of the photovoltaic cell.

[0009] Furthermore, the airflow direction of the side duct is inclined towards the exhaust port and the direction of the marking.

[0010] Furthermore, the airflow regulating valve is connected to clean compressed air, and the exhaust port is connected to the fan and dust collection device.

[0011] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0012] This utility model utilizes parallel airflow to quickly separate the dust generated during laser marking from the solar cells, preventing any impact on the marking effect. It creates the necessary airflow channels within the outer casing, effectively allowing the generated fine dust to pass quickly through these channels and into the dust collection device via the exhaust port. This prevents obstruction of the laser beam path, effectively removes dust, improves laser processing quality, and ensures the efficiency of the photovoltaic cells. The structure is simple, installation is convenient, and the dust removal device is fixed, ensuring equipment safety. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0014] Figure 1 This is a three-dimensional structural diagram of the assembly of this utility model;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 This is a bottom view of the structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the airflow direction of the side duct of this utility model;

[0018] Figure 5 This is a schematic diagram of the airflow direction in the duct of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Example

[0021] refer to Figures 1-4 A laser scribing dust removal device for photovoltaic cells is disclosed. The entire device is installed approximately 10mm above the photovoltaic cell 7 and centered on it. It includes a laser field lens 1, optical glass 2, observation cover 3, outer cover 4, air duct 5, airflow regulating valve 6, side air duct 8, exhaust port 9, and observation window 10. The observation cover 3 is sealed and connected above the outer cover 4. The optical glass 2 is mounted on the observation cover 3, and the laser field lens 1 is mounted on the optical glass 2. The observation window 10 is installed on both sides of the observation cover 3. The air duct 5 and the side air duct 8 are installed on the side wall of the outer cover 4. There are two sets of side air ducts 8, symmetrically arranged on both sides of the outer cover 4. Airflow regulating valves 6 are installed on the air duct 5 and the side air duct 8 respectively. The exhaust port 9 is connected to the other side wall of the outer cover 4 opposite to the position of the air duct 5. The airflow regulating valve 6 is connected to clean compressed air, and the exhaust port 9 is connected to a fan and a dust collection device.

[0022] The direction of the scribing on the photovoltaic cell 7 is parallel to the installation direction of the exhaust port 9 and the side duct 8, and perpendicular to the installation direction of the duct 5.

[0023] The airflow direction of the air duct 5 is consistent with the direction of the scribing and is inclined downward at an angle to the processed surface of the photovoltaic cell 7.

[0024] The airflow direction of the side air duct 8 is inclined towards the exhaust port 9 and the direction of the scribed line.

[0025] By adjusting the airflow regulating valve 6, the air duct 5 and the side air duct 8 to a certain intensity of airflow, and by adjusting the fan, the exhaust port 9 has a certain intensity of suction. The laser system processes the material according to the predetermined scribing trajectory, and the dust removal device operates synchronously. An airflow channel is formed in the semi-enclosed space mainly formed by the outer cover 4, which faces the exhaust port 9, to remove the dust particles generated during processing.

[0026] This utility model utilizes clean compressed air parallel to the scribing direction and at a certain angle to the cell processing surface to collect dust generated by laser scribing and dust falling on the cell surface and within the scribing lines. The dust is made to float due to the rebound of the cell surface. Combined with clean compressed air on both sides of the scribing direction and at a certain angle to the air intake, the floating dust is concentrated in a certain area. The negative pressure generated by the air intake forces the dust into a predetermined airflow channel and into the dust collection device.

[0027] By using parallel airflow, the dust generated during laser marking is quickly separated from the solar cells, preventing it from affecting the marking effect. The floating dust quickly enters a designated airflow channel and is collected by a dust collection device, avoiding obstruction of the laser beam path. This effective dust removal improves laser processing quality and ensures the efficiency of the photovoltaic cells. The structure is simple, easy to install, and the fixed dust collection device ensures the safety of the equipment.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser scribe and dust removal apparatus for photovoltaic cells, characterized by: The device comprises a laser field mirror (1), optical glass (2), an observation cover (3), an outer cover (4), an air pipe (5), an air flow adjusting valve (6), a side air pipe (8), an air suction port (9), and an observation window (10). The observation cover (3) is sealingly connected above the outer cover (4), the optical glass (2) is arranged on the observation cover (3), the laser field mirror (1) is arranged on the optical glass (2), the observation window (10) is installed on both sides of the observation cover (3), the air pipe (5) and the side air pipe (8) are installed on the side wall of the outer cover (4), the side air pipe (8) is provided with two groups and symmetrically arranged on both sides of the outer cover (4), the air flow adjusting valve (6) is respectively installed on the air pipe (5) and the side air pipe (8), and the air suction port (9) is connected to the other side wall of the outer cover (4) opposite to the air pipe (5).

2. The laser scribe and cleaning apparatus for photovoltaic cells according to claim 1, wherein: The whole device is installed above the photovoltaic cell (7) by about 10 mm and is placed in the center of the photovoltaic cell (7).

3. The laser scribe and cleaning apparatus for photovoltaic cells of claim 1, wherein: The scribing direction of the photovoltaic cell (7) is parallel to the installation direction of the air suction port (9) and the side air pipe (8) and is perpendicular to the installation direction of the air pipe (5).

4. The laser scribe and cleaning apparatus for photovoltaic cells of claim 1, wherein: The blowing air flow direction of the air pipe (5) is consistent with the scribing direction and forms a downward inclined angle with the processing surface of the photovoltaic cell (7).

5. The laser scribe and cleaning apparatus of claim 1, wherein: The blowing air flow direction of the side air pipe (8) is inclined to the air suction port (9) and the scribing direction.

6. The laser scribe and cleaning apparatus for photovoltaic cells of claim 1, wherein: The air flow adjusting valve (6) is connected to clean compressed air, and the air suction port (9) is connected to a fan and a dust collecting device.

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