Multi-station photovoltaic laser removing equipment

Abstract

The invention relates to the technical field of photovoltaic solar cell processing, in particular to multi-station photovoltaic laser removal equipment which comprises a feeding mechanism, a discharging mechanism, an annular conveying device and a plurality of laser removal processing stations. The feeding mechanism, the multiple laser removal machining stations and the discharging mechanism are sequentially arranged along the conveying track of the annular conveying device. By means of the design of the annular track, the number of the objective tables capable of being contained at the same time is increased, a machining basis is provided for achieving multi-station multi-process laser removal, the feeding number of the feeding mechanism each time, the laser removal machining time and the feeding time of the feeding mechanism each time are calculated, the corresponding number of laser removal machining stations and processes are configured in a matched mode, and the machining efficiency is improved. And the utilization rate of equipment can be greatly improved, the machining efficiency is greatly improved, and the productivity is greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic solar cell processing, in particular to a multi-station photovoltaic laser removal device. Background Art

[0002] With the continuous development of the photovoltaic solar cell industry, competition is becoming increasingly fierce, and higher requirements are placed on the efficiency and stability of photovoltaic solar cell processing equipment. Fast, efficient and more stable processing equipment is needed to continuously reduce the cost of solar cell manufacturing.

[0003] In the laser removal process, the existing technology adopts the following method: Figure 1 In the loading and unloading processing method shown, the manipulator of the loading mechanism 11 picks up two pieces of materials to be laser removed each time and transfers them to the processing turntable 13. The turntable is divided into two symmetrical sides, and two loading platforms 14 are arranged on each side. When the loading platform 14 on one side is laser removed at the processing station 15, the loading platform on the other side is loading and unloading. After the unloading mechanism 12 sucks the silicon wafer to complete the unloading, the loading mechanism 11 loads the silicon wafer. The loading mechanism 11 is driven by the DD motor (direct drive motor) to complete the rotation and conversion of the loading and unloading platforms and the processing platform. In the prior art, Figure 1 For the laser removal equipment shown in the figure, during the processing stage, the DD motor rotates for 0.2s, the laser processing time is more than 2s (the specific time depends on the process requirements), and the total processing time is at least 2.2s or more; and in the loading stage, the loading robot sucks the film for 0.15s, rotates for 0.2s, puts the film for 0.15s, takes a photo for positioning for 0.2s, and the turntable rotates for 0.2s, and the loading time is a total of 0.9s. Obviously, in each processing process, the loading mechanism needs to wait for at least 1.2 seconds before proceeding to the next round of loading action, which wastes a lot of time, reduces processing efficiency, and limits the improvement of production capacity.

[0004] On this basis, some people have proposed improvement plans to improve equipment utilization. One of the most representative plans is to change the turntable from two sides (one side for loading and unloading and the other side for processing) to four sides (one side for loading and unloading and the other three sides for processing or both sides for processing), such as the application number 201920112999.7 proposed by Deer Laser, a universal solar cell laser processing unit and its composed equipment. However, after adding the stage, the turntable has increased weight and moment of inertia after loading, which exceeds the limit of the DD motor, resulting in reduced turntable rotation accuracy and a significant decrease in processing yield. It has no possibility of practical application, and even if a larger DD motor is replaced, it cannot overcome the limitation of moment of inertia overload. Summary of the invention

[0005] In view of this, the main purpose of the present invention is to provide a multi-station photovoltaic laser removal equipment. By introducing a ring conveyor to replace the original DD motor driven turntable method, multiple loading platforms are arranged on the ring conveyor, and multiple laser removal process stations are arranged on one side of the ring conveyor processing. By calculating the loading time and the laser removal processing time, the corresponding number of stations are set for matching, which can greatly improve the equipment utilization rate, greatly improve the processing efficiency, and greatly increase the production capacity to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-station photovoltaic laser removal device, comprising a loading mechanism, a unloading mechanism, a ring conveying device, and a plurality of laser removal processing stations;

[0007] The loading mechanism, the plurality of laser removal processing stations, and the unloading mechanism are arranged in sequence along the conveying track of the annular conveying device;

[0008] The annular conveying device comprises an annular track and a plurality of loading platforms arranged on the annular track;

[0009] The number of laser removal processing stations is the integer of the number of materials loaded by the loading mechanism each time multiplied by the ratio of the laser removal processing time to the loading time of each loading by the loading mechanism;

[0010] The loading time includes the time for the loading robot to suck the film, rotate, put the film, take pictures and locate the film, and the time for the stage to rotate along the circular track to the waiting position.

[0011] The processing time includes the time it takes for the stage to rotate along the circular track to the processing position and the laser processing time.

[0012] Furthermore, the feeding mechanism can feed two pieces of material each time, and the number of laser removal processing stations is four.

[0013] As an improvement, the laser removal processing station includes multiple first laser removal processing stations and multiple second laser removal processing stations; the multiple second laser removal processing stations are located between the first laser removal processing stations and the unloading mechanism, and the loading mechanism, multiple first laser removal processing stations, multiple second laser removal processing stations, and unloading mechanism are arranged in sequence along the conveying trajectory of the annular conveying device.

[0014] Furthermore, the number of the first laser removal processing stations is the same as the number of the second laser removal processing stations, and the number of the first laser removal processing stations is the ratio of the number of materials loaded by the loading mechanism each time multiplied by the laser removal processing time and the loading time of each loading by the loading mechanism, and the number of laser removal processing stations is an integer.

[0015] Furthermore, the feeding mechanism can feed two materials each time, the number of the first laser removal processing stations is four, and the number of the second laser removal processing stations is also four.

[0016] As an improvement, the laser removal processing station includes at least one process laser removal processing station, the number of various process laser removal processing stations is the same, and each identical process laser removal processing station is adjacent to each other; the loading mechanism, multiple process laser removal processing stations, and the unloading mechanism are arranged in sequence along the conveying track of the annular conveying device.

[0017] As an improvement, the annular track includes two parallel linear tracks, which are connected by a revolving track; one of the linear tracks is a loading and unloading linear track, and the other linear track is a processing linear track.

[0018] Furthermore, the plurality of laser removal processing stations are sequentially arranged on the processing linear track, the loading mechanism and the unloading mechanism are arranged on the loading and unloading linear track, the loading mechanism is arranged upstream of the laser removal processing station, and the unloading mechanism is arranged downstream of the laser removal processing station.

[0019] Furthermore, the annular conveying device includes an annular motor, which includes an annular stator track and a plurality of movable components arranged on the annular stator track. The movable components are provided with a loading platform, and the loading platform is used to place materials to be processed.

[0020] Furthermore, the number of the movable subassemblies is an integer multiple of the number of the laser removal processing stations.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The technical solution of the present invention abandons the traditional transmission method, and improves the original turntable conversion transmission to transmission through a circular track, decomposing the turntable with fixed loading and unloading into a circular track and separate loading platforms distributed on the circular track. The mass of each loading platform for transmitting materials separately is small, which is convenient for precise control. The design of the circular track increases the number of loading platforms that can be accommodated at the same time, and provides a processing basis for realizing multi-station and multi-process laser removal. By calculating the amount of material loaded each time by the loading mechanism, the laser removal processing time and the loading time of the loading mechanism each time, and matching the corresponding number of laser removal processing stations and processes, the utilization rate of the equipment can be greatly improved, the processing efficiency can be greatly improved, and the production capacity can be greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the existing photovoltaic laser removal equipment;

[0024] Figure 2 It is a schematic top view of the photovoltaic laser removal device of the present invention;

[0025] Figure 3 A schematic top view of another photovoltaic laser removal device of the present invention;

[0026] Figure 4 It is a top view schematic diagram of another photovoltaic laser removal device of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 2-4 , the present invention provides a technical solution: a multi-station photovoltaic laser removal device 2, including a loading mechanism 21, a unloading mechanism 22, a ring conveying device 23, and a plurality of laser removal processing stations 25;

[0029] The loading mechanism 21, the plurality of laser removal processing stations 25, and the unloading mechanism are sequentially arranged along the conveying track of the annular conveying device 23; the annular conveying device 23 includes an annular track and a plurality of loading platforms 24 arranged on the annular track;

[0030] The number of laser removal processing stations 25 is the integer of the number of materials loaded by the loading mechanism each time multiplied by the ratio of the laser removal processing time to the loading time of the loading mechanism each time. The loading time includes the time for the loading robot to suck the film, rotate, put the film, take pictures and position, and the time for the stage to rotate along the circular track to the waiting position; the processing time includes the time for the stage to rotate along the circular track to the processing position and the laser processing time.

[0031] As a preferred solution of the present invention, the number of the laser removal processing stations 15 is the integer of the product of the number of materials loaded each time by the loading mechanism and the ratio of the laser removal processing time to the loading time of each loading by the loading mechanism, such as 4 stations, 6 stations, and 8 stations. This is just for the convenience of understanding the special examples given here, and it is not a specific limitation of the solution of the present invention. The number of stations applicable to the present invention is not limited to this.

[0032] Further, as Figure 1The existing photovoltaic laser removal equipment is used as the basis for transformation. Its feeding mechanism can feed two materials each time. After improvement, the number of laser removal processing stations of the new photovoltaic laser removal equipment can be 4 or 8. Figure 2-3 shown.

[0033] As a solution of the present invention, the circular track includes two parallel linear tracks, and the two linear tracks are connected by a rotary track; one of the linear tracks is a loading and unloading linear track, and the other linear track is a processing linear track. Further, a plurality of the laser removal processing stations 25 are sequentially arranged on the processing linear track, the loading mechanism 21 and the unloading mechanism 22 are arranged on the loading and unloading linear track, the loading mechanism 21 is arranged upstream of the laser removal processing station 25, and the unloading mechanism 22 is arranged downstream of the laser removal processing station 25.

[0034] As a further improvement of the present invention, the annular conveying device 23 includes an annular motor, which includes an annular stator track and a plurality of movable components arranged on the annular stator track, and a loading platform 24 is arranged on the movable component, and the loading platform 24 is used to place the material to be processed.

[0035] Among them, the rotating track can be a semicircular structure, so that its connection position with the processing linear track and the loading and unloading linear track is relatively smooth, which is conducive to the movement of the movable sub-assembly, and each of the movable sub-assemblies slides with the annular track; when power is turned on, each of the movable sub-assemblies can move to the target position along the annular track.

[0036] As an improved solution of the present invention, the number of the moving components is an integer multiple of the number of laser removal processing stations. Figure 3 Taking the photovoltaic laser removal device as an example, the number of laser removal processing stations 25 is 4, and the number of mover assemblies is at least 8, and may also be 12. The specific number is not limited in detail in the present invention, and can be set and adjusted according to actual conditions.

[0037] The processing workflow of the single-process multi-station photovoltaic laser removal equipment of the present invention is as follows:

[0038] Loading: the automatic loading robot of the loading mechanism 21 picks up the silicon wafer to be processed from the assembly line tray and transfers it to the conveying device;

[0039] Conveying: When the loading quantity reaches the predetermined amount, the computer controls the movable subassembly to carry the silicon wafer placed on the stage and move along the circular slide to the target position for processing;

[0040] Processing, when the silicon wafer on the stage 24 moves to the position below the laser removal processing station, the laser removal processing station 25 performs removal processing on the silicon wafer;

[0041] After unloading, the computer controls the movable subassembly to continue to move along the circular track to the target position for unloading. The unloading mechanism 22 automatically unloads the silicon wafer from the loading platform and transfers it to the assembly line tray to complete the unloading.

[0042] As an improved solution of the present invention, the laser removal processing station 25 may include multiple laser removal processing processes 25. The laser removal processing station 25 includes multiple process laser removal processing stations 25, the number of various process laser removal processing stations 25 is the same, and each of the same process laser removal processing stations 25 is adjacent; the loading mechanism 21, the multiple process laser removal processing stations 25, and the unloading mechanism 22 are arranged in sequence along the conveying track of the annular conveying device 23.

[0043] Specifically, this embodiment takes two processes as an example. Among them, the laser removal processing station 25 includes a plurality of first laser removal processing stations 25 and a plurality of second laser removal processing stations 25; the plurality of second laser removal processing stations 25 are located between the first laser removal processing stations 25 and the unloading mechanism 22, and the loading mechanism 21, the plurality of first laser removal processing stations 25, the plurality of second laser removal processing stations 25, and the unloading mechanism 22 are arranged in sequence along the conveying track of the annular conveying device 23.

[0044] Furthermore, the number of the first laser removal processing stations 25 is the same as the number of the second laser removal processing stations 25, and the number of the first laser removal processing stations 25 is the ratio of the number of materials loaded each time by the loading mechanism 21 multiplied by the laser removal processing time and the loading time of each loading by the loading mechanism 21, and the number of laser removal processing stations is an integer.

[0045] Furthermore, the feeding mechanism 21 feeds two materials each time, the number of the first laser removal processing stations 25 is four, and the number of the second laser removal processing stations 25 is also four.

[0046] As an improved solution of the present invention, in order to save space and make the laser removal equipment more compact, a plurality of laser removal processing stations 25 are configured to be symmetrically arranged along both sides of the processing linear track. Figure 4 As shown, taking the dual-process eight-station as an example, the four first laser removal processing stations 25 are configured as two symmetrically on both sides of the processing linear track, and the four second laser removal processing stations 25 are also configured as two symmetrically on both sides of the processing linear track.

[0047] The processing workflow of the multi-process and multi-station photovoltaic laser removal equipment of the present invention is as follows:

[0048] Loading: the automatic loading robot of the loading mechanism 21 picks up the silicon wafer to be processed from the assembly line tray and transfers it to the conveying device 23;

[0049] Conveying: When the loading quantity reaches the predetermined amount, the computer controls the movable subassembly to carry the silicon wafer placed on the stage and move along the circular slide to the target position for processing;

[0050] When the silicon wafer on the stage 24 moves to the position below the first laser removal processing station 25, the laser removal processing device removes the silicon wafer. After the first process is completed, the computer controls the mover assembly to move along the circular track to the position below the second laser removal processing station 25 for the second process. At the same time, the first laser removal processing station 25 processes the second group of silicon wafers that have been newly transported, and so on.

[0051] Unloading, after the second processing process is completed, the computer controls the movable subassembly to continue to move along the circular track to the target position for unloading, and the unloading mechanism 22 automatically unloads the silicon wafer from the loading platform and transfers it to the assembly line tray to complete the unloading.

[0052] For the photovoltaic laser removal equipment of the prior art, it takes 2.8 seconds to process two silicon wafers, including 2.6 seconds of laser processing and 0.2 seconds of turntable rotation; therefore, it takes 5.6 seconds to process four wafers. For the single-process four-station solution of the present invention, it takes only 2.8 seconds to process four silicon wafers, while for the dual-process eight-station solution of the present invention, it takes only 1.4 seconds to process four silicon wafers, and the processing efficiency is four times that of the previous one. The various parts of the equipment are closely matched without gaps, which improves the utilization rate of the feeding mechanism and the conveying device, greatly improves the processing efficiency of the equipment, and can greatly increase production capacity.

[0053] The technical solution of the present invention abandons the traditional transmission method, and improves the original turntable conversion transmission to transmission through a circular track, decomposing the turntable with fixed loading and unloading into a circular track and separate loading platforms distributed on the circular track. The mass of each loading platform for transmitting materials separately is small, which is convenient for precise control. The design of the circular track increases the number of loading platforms that can be accommodated at the same time, and provides a processing basis for realizing multi-station and multi-process laser removal. By calculating the amount of material loaded each time by the loading mechanism, the laser removal processing time and the loading time of the loading mechanism each time, and matching the corresponding number of laser removal processing stations and processes, the utilization rate of the equipment can be greatly improved, the processing efficiency can be greatly improved, and the production capacity can be greatly increased.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station photovoltaic laser removal device, characterized in that: It includes a loading mechanism, a unloading mechanism, a ring conveying device, and multiple laser removal processing stations; The loading mechanism, the plurality of laser removal processing stations, and the unloading mechanism are arranged in sequence along the conveying track of the annular conveying device; The number of the laser removal processing stations is greater than or equal to two, and less than or equal to the number of materials loaded by the loading mechanism each time multiplied by the ratio of the laser removal processing time to the loading time of the loading mechanism each time; The loading time includes the time for the loading robot to suck the film, rotate, put the film, take pictures and locate the film, and the time for the stage to rotate along the circular track to the waiting position. The processing time includes the time it takes for the stage to rotate along the circular track to the processing position and the laser processing time.

2. The multi-station photovoltaic laser removal equipment according to claim 1, characterized in that: The feeding mechanism can feed two materials each time, and the number of laser removal processing stations is four.

3. The multi-station photovoltaic laser removal equipment according to claim 1, characterized in that: The laser removal processing station includes multiple first laser removal processing stations and multiple second laser removal processing stations; the multiple second laser removal processing stations are located between the first laser removal processing stations and the unloading mechanism, and the loading mechanism, multiple first laser removal processing stations, multiple second laser removal processing stations, and the unloading mechanism are arranged in sequence along the conveying track of the annular conveying device.

4. The multi-station photovoltaic laser removal equipment according to claim 3, characterized in that: The number of the first laser removal processing stations is the same as the number of the second laser removal processing stations, the number of the first laser removal processing stations or the second laser removal processing stations is greater than or equal to two, and is less than or equal to the number of materials loaded by the loading mechanism each time multiplied by the ratio of the laser removal processing time to the loading time of each loading mechanism.

5. The multi-station photovoltaic laser removal equipment according to claim 4, characterized in that: The feeding mechanism can feed two materials each time, the first laser removal processing stations can be four, and the second laser removal processing stations can also be four.

6. The multi-station photovoltaic laser removal equipment according to claim 1, characterized in that: The laser removal processing station includes at least one process laser removal processing station, the number of various process laser removal processing stations is the same, and each same process laser removal processing station is adjacent to each other; the loading mechanism, multiple process laser removal processing stations, and the unloading mechanism are arranged in sequence along the conveying track of the annular conveying device.

7. The multi-station photovoltaic laser removal equipment according to claim 1, characterized in that: The annular conveying device includes an annular track, and the annular track includes two parallel linear tracks, which are connected by a revolving track; one of the linear tracks is a loading and unloading linear track, and the other linear track is a processing linear track.

8. The multi-station photovoltaic laser removal equipment according to claim 7, characterized in that: The plurality of laser removal processing stations are sequentially arranged on the processing linear track, the loading mechanism and the unloading mechanism are arranged on the loading and unloading linear track, the loading mechanism is arranged upstream of the laser removal processing station, and the unloading mechanism is arranged downstream of the laser removal processing station.

9. The multi-station photovoltaic laser removal equipment according to claim 8, characterized in that: The annular conveying device includes an annular motor, which includes an annular stator track and a plurality of movable components arranged on the annular stator track. A loading platform is arranged on the movable component, and the loading platform is used to place materials to be processed.

10. The multi-station photovoltaic laser removal equipment according to claim 9, characterized in that: The number of the mover components is an integer multiple of the number of laser removal processing stations.

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