CN114932324B - Single-laser solar cell nondestructive cutting method, controller and device - Google Patents
Single-laser solar cell nondestructive cutting method, controller and device Download PDFInfo
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- CN114932324B CN114932324B CN202210519461.4A CN202210519461A CN114932324B CN 114932324 B CN114932324 B CN 114932324B CN 202210519461 A CN202210519461 A CN 202210519461A CN 114932324 B CN114932324 B CN 114932324B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008646 thermal stress Effects 0.000 claims abstract description 14
- 238000005336 cracking Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000001179 sorption measurement Methods 0.000 claims description 42
- 238000010304 firing Methods 0.000 claims description 4
- 230000002045 lasting effect Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 4
- 238000002309 gasification Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000004093 laser heating Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000000960 laser cooling Methods 0.000 description 4
- 238000003698 laser cutting Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- H01L31/18—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Laser Beam Processing (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application relates to a single laser solar cell nondestructive cutting method, a controller and a device, wherein the method comprises the steps of fixing a cell at a position to be cut; burning the edge of the battery piece along a preset cutting path by utilizing a laser beam to form a pre-split; wherein, the battery piece and the laser beam move relatively; and then the battery piece is heated by using the laser beam through the tail part of the pre-split, so that hot spots are formed on the battery piece, and thermal stress is formed on the cutting path by the hot spots, so that the battery piece is disconnected along the cutting path. According to the application, the laser burning and heating are carried out on the edge of the photovoltaic cell by using one beam of infrared laser, so that the cell is naturally cracked, in the application, the laser slotting pre-cracking and the laser heating are continuously carried out, no gasification or melting is carried out in the cutting process, no dust is generated, no water cooling is carried out, the damage to the surface of the cell is reduced, the formed hot area is small due to small hot spots, the problem that the slotting pre-cracking and the heating path are not coincident is solved, and the efficiency of the cell after slicing is increased.
Description
Technical Field
The application belongs to the technical field of cutting processing, and particularly relates to a single-laser solar cell nondestructive cutting method, a controller and a device.
Background
With the great development of the photovoltaic industry, the size of the battery piece is also increased, and although the conversion efficiency in the use of the photovoltaic is increased, the current of the battery assembly is increased, so that the safety problem is not guaranteed. In order to increase the conversion efficiency and reduce the safety risk, half-sheets are used for series assembly in the industry, so that the current is reduced, and the safety is improved.
In the related art, the cutting of the battery piece in the photovoltaic market uses the laser splitting and dual-laser cooling cutting technology. The laser splitting is to scribe the battery piece by using infrared high-power laser to form a V-shaped groove, and then mechanically split, so that the V-shaped groove of the battery piece is gasified or melted, a bilateral heat affected zone of the battery piece is 100-140 um wide, and the power of the battery piece is reduced. The double-laser cooling cutting method is characterized in that two laser beams are utilized, one laser beam is used for grooving and pre-splitting at the front edge and the rear edge of a battery piece cutting path, the other laser beam is used as heating laser beam, and water cooling is carried out to form thermal stress.
Disclosure of Invention
In view of the above, the application aims to overcome the defects of the prior art, and provides a single laser solar cell nondestructive cutting method, a controller and a device, so as to solve the problems that the method for cutting the photovoltaic cell in the prior art is complex in operation and causes damage to the surface of the cell.
In order to achieve the above purpose, the application adopts the following technical scheme: a single laser solar cell nondestructive cutting method comprises the following steps:
fixing the battery piece at a position to be cut;
firing the edge of the battery piece along a preset cutting path by utilizing a laser beam emission pulse signal to form a pre-split; wherein, the battery piece and the laser beam move relatively;
after a preset time period, the pulse signal emitted by the laser beam is converted into a direct current signal, and the direct current signal heats the battery piece through the tail part of the pre-break, so that a hot spot is formed on the battery piece, and the hot spot enables thermal stress to be formed on the cutting path, so that the battery piece is disconnected along the cutting path.
Further, the peak power of the pulse signal generated by the laser beam is 2-10 times of the heating power for generating the direct current signal;
the frequency of the pulse signal is in the range of 20-80 KHz.
Further, acquiring an electric signal of the distance between the battery pieces by adopting a distance sensor, and determining the distance between the battery pieces and the laser beam according to the electric signal;
when the distance between the battery piece and the laser beam is preset, the laser beam generates a pulse signal and is converted into a direct current signal after lasting for a preset time period to heat the battery piece.
Further, the depth of the pre-split is 60% -80% of the thickness of the battery piece;
the length of the pre-cracking opening is less than or equal to 5mm.
Further, the value range of the hot spot diameter is less than or equal to 20um.
An embodiment of the present application provides a controller, including:
a memory having an executable program stored thereon;
a processor, configured to execute the executable program in the memory, so as to implement the steps of the method according to any one of the foregoing embodiments.
The embodiment of the application provides a single laser solar cell nondestructive cutting device, which comprises: the controller, the laser beam generating device, the distance sensor and the negative pressure adsorption tray provided in any of the above embodiments;
the negative pressure adsorption tray is used for fixing the battery piece;
the laser beam generating device is used for generating a laser beam;
the distance sensor is arranged at a preset distance at the front end of the laser beam generating device;
the controller is used for receiving a distance signal sent by the distance sensor to control the laser beam generating device to generate a pulse signal, the pulse signal burns the edge of the battery piece along a preset cutting path to form a pre-break, the pulse signal is converted into a direct current signal after a preset time period, the direct current signal heats the battery piece through the tail part of the pre-break, hot spots are formed on the battery piece, and the hot spots enable thermal stress to be formed on the cutting path, so that the battery piece is disconnected along the cutting path.
Further, the negative pressure adsorption tray is provided with a plurality of positioning clamping grooves; the positioning clamping groove is provided with a plurality of adsorption holes, the adsorption holes are communicated with the air pipe connecting holes, and the air pipe connecting holes are used for generating pressure intensity of the adsorption holes.
Further, still be equipped with on the negative pressure adsorption tray:
and the adjusting knob is used for adjusting the gas adsorption pressure of the adsorption hole.
Further, still be equipped with on the negative pressure adsorption tray: and the pressure digital display meter is used for displaying the gas adsorption pressure.
By adopting the technical scheme, the application has the following beneficial effects:
the application provides a single laser solar cell nondestructive cutting method, a controller and a device, which have the following beneficial effects:
the application only uses one laser beam, reduces the use of laser and reduces the laser power. The surface of the battery piece is not damaged due to the fact that water cooling is not needed. Besides the short groove with the groove at the first section and the pre-split, the groove at the head and the tail is not needed, the utilization rate of the battery piece is close to 100%, and the utilization rate of the battery piece is improved. In addition, the application has no generation of cutting dust and is environment-friendly. And the cut cross section is smooth, and the problem of black lines on the cross section caused by fine irregularities is avoided.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the steps of the single laser solar cell non-destructive cutting method of the present application;
FIG. 2 is a schematic diagram illustrating the operation of the single laser solar cell non-destructive cutting method of the present application;
FIG. 3 is a schematic diagram of the single laser solar cell nondestructive cutting method of the present application;
FIG. 4 is a schematic diagram of a controller according to the present application;
fig. 5 is a schematic structural view of the negative pressure adsorption tray provided by the application;
FIG. 6 is a graph comparing a double laser cooled cut fracture surface with a single laser cut fracture surface provided by the present application;
fig. 7 is a graph comparing the coincidence degree of the pre-split and the split path of the dual laser cooling cutting slot provided by the application with the coincidence degree of the pre-split and the split path of the single laser cutting slot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, based on the examples herein, which are within the scope of the application as defined by the claims, will be within the scope of the application as defined by the claims.
The following describes a specific single laser solar cell nondestructive cutting method, a controller 4 and a device provided in the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1, the single laser solar cell non-destructive cutting method provided in the embodiment of the application includes:
s101, fixing the battery piece 1 at a position to be cut;
s102, firing the edge of the battery piece 1 along a preset cutting path by utilizing a laser beam emission pulse signal to form a pre-break; wherein, the battery piece 1 and the laser beam move relatively;
and S103, converting the pulse signal emitted by the laser beam into a direct current signal after a preset time period, wherein the direct current signal heats the battery piece 1 through the tail part of the pre-break, so that hot spots are formed on the battery piece 1, and the hot spots enable thermal stress to be formed on the cutting path, so that the battery piece 1 is disconnected along the cutting path.
The working principle of the single laser solar cell nondestructive cutting method is as follows: referring to fig. 2, first, a battery piece 1 is fixed at a position to be cut, the position to be cut is located below a laser beam generating device 2, the battery piece 1 and the laser beam move relatively, and in the present application, the battery piece 1 is laser-burned by a pulse signal in a preset time period to form an initial pre-break 3. After a preset period of time, the pulse signal is converted into a direct current signal, and the direct current signal heats the battery piece 1 through the tail part of the pre-cracking opening 3, so that hot spots are formed on the battery piece 1, and the hot spots enable thermal stress to be formed on the cutting path, so that the battery piece 1 is broken along the cutting path. As shown in fig. 3, the specific reason is that, due to the small hot spot, the laser energy is high, when the hot spot acts on the battery piece 1, an uneven temperature field and temperature gradient are formed around the hot spot, and the temperature gradient induces the generation of thermal stress, so that the crack of the battery piece 1 naturally cracks towards the moving direction of the hot spot, and the technical scheme provided by the application can form a temperature difference without water cooling.
The range of the diameter of the hot spot is less than or equal to 20um. That is, the hot spot diameter of the laser was in the range of (0, 20 um).
The application adopts the conversion of pulse signals and direct current signals in the same laser beam to burn and heat the battery piece 1, and the whole process is in a coherent state. When the battery piece 1 is heated, thermal stress is formed on the cutting path, so that the battery piece 1 is naturally cracked, no gasification or melting or dust is generated in the cutting process, no water cooling is adopted, the damage to the surface of the battery piece 1 is reduced, the efficiency of the battery piece 1 is improved, the hot spots are small, the formed hot area is small, the laser power is small, the problem that the slotting pre-split 3 is not overlapped with the heating path is solved, and the complexity of equipment is reduced.
In some embodiments, the peak power of the pulse signal generated by the laser beam is 2-10 times of the heating power for generating the direct current signal; as a preferred embodiment, the pulsed laser power described in the present application is 4 times the heating laser power. The wavelength of the infrared laser light is [950, 1150].
The frequency of the pulse signal is in the range of 20-80 KHz. The range of the pulse frequency in the application is (20K, 80 KHz), preferably 40KHz, 50KHz and 60KHz, which is favorable for cutting the depth of cracks.
In some embodiments, a distance sensor is used to collect an electrical signal of the distance of the battery piece 1, and the distance between the battery piece 1 and the laser beam is determined according to the electrical signal;
when the distance between the battery piece 1 and the laser beam is a preset distance, the laser beam generates a pulse signal and is converted into a direct current signal after lasting for a preset time period to heat the battery piece 1.
As a specific embodiment, the distance sensor is arranged at the front end 30mm of the laser beam generating device 2, when the distance between the battery piece 1 and the distance sensor is detected to be smaller than the preset distance, a signal is sent to the controller 4, the controller 4 controls the laser beam generating device 2 to generate a pulse signal, the pulse signal burns the edge of the battery piece 1 along a preset cutting path to form a pre-split 3, the pulse signal is converted into a direct current signal after a preset time period, the direct current signal heats the battery piece 1 through the tail part of the pre-split 3, hot spots are formed on the battery piece 1, and the hot spots form thermal stress on the cutting path to disconnect the battery piece 1 along the cutting path
In some embodiments, the depth of the pre-cracking opening 3 is 60% -80% of the thickness of the battery piece 1; preferably 70%. The collimation degree of the cutting crack is facilitated.
The length of the pre-cracking opening 3 is less than or equal to 5mm.
As a preferred embodiment, the length of the grooving pre-split 3 is in the range of 1-2 mm, preferably 1, 1.5 or 2mm, which is beneficial to grooving and forming cutting stress.
As shown in fig. 4, an embodiment of the present application provides a controller 4, including:
a memory 401 on which an executable program is stored;
a processor 402 for executing the executable program in the memory to implement the steps of any of the methods described above.
The embodiment of the application provides a single laser solar cell nondestructive cutting device, which comprises: the controller 4, the laser beam generating device 2, the distance sensor (not shown in the figure), and the negative pressure suction tray provided in the above embodiments;
the negative pressure adsorption tray is used for fixing the battery piece 1;
the laser beam generating device 2 is used for generating a laser beam;
the distance sensor is arranged at a preset distance at the front end of the laser beam generating device 2;
the controller 4 is configured to receive a distance signal sent by the distance sensor, control the laser beam generating device 2 to generate a pulse signal, burn the edge of the battery piece 1 along a preset cutting path to form a pre-break 3, convert the pulse signal into a direct current signal after a preset time period, heat the battery piece 1 through the tail of the pre-break 3, and form a hot spot on the battery piece 1, where the hot spot makes a thermal stress on the cutting path, so that the battery piece 1 is disconnected along the cutting path.
As a preferred embodiment, as shown in fig. 5, the negative pressure adsorption tray 5 is provided with a plurality of positioning clamping grooves 51; the positioning clamping groove 51 is provided with a plurality of adsorption holes 52, the adsorption holes 52 are communicated with a gas pipe connecting hole 53, and the gas pipe connecting hole 53 is used for generating pressure intensity of the adsorption holes 52.
The negative pressure adsorption tray 5 is also provided with:
an adjusting knob 54 for adjusting the gas adsorption pressure of the adsorption hole 52.
The negative pressure adsorption tray 5 is also provided with: and the pressure digital display meter 55 is used for displaying the gas adsorption pressure.
As a specific embodiment, the application places the battery piece 1 on the negative pressure adsorption tray 5, places the battery piece 1 at an accurate position through the positioning clamping groove 51, and adsorbs the battery piece 1 on the negative pressure adsorption tray 5 through the adsorption hole 52. The negative pressure adsorption tray 5 is also provided with a sealing hole 56.
According to the application, the distance sensor is arranged at the position of 30mm of the front end of the laser, when the battery piece 1 reaches the position of the distance sensor at 200mm/s, 150ms laser pulse is given to delay triggering, the frequency of a laser pulse signal is 60KHz, the duration is 10ms, the length of a pre-split 3 for cutting and slotting the edge of the battery piece 1 is 2mm, and the cutting depth is 80%. Immediately after a preset period of time, the cutting path is converted into a direct current signal, and the direct current signal is used as continuous laser to heat the cutting path of the battery piece 1.
As another embodiment, the battery piece 1 is placed on the negative pressure adsorption tray 5, the battery piece 1 is placed at an accurate position by a positioning groove, and the battery piece 1 is adsorbed on the negative pressure adsorption tray 5 by the adsorption hole 52.
When the battery piece 1 reaches the position of the distance sensor at 300mm/s, the laser pulse is given to be triggered by the delay of 100ms, the frequency of a laser pulse signal is 40KHz, the duration is 6.6ms, the length of a pre-split 3 for cutting and slotting the edge of the battery piece 1 is 2mm, and the cutting depth is 100%. And then the cutting path of the battery piece 1 is heated as continuous laser after being converted into a direct current signal.
As another embodiment, the battery piece 1 is placed on the negative pressure adsorption tray 5, the battery piece 1 is placed at an accurate position by a positioning groove, and the battery piece 1 is adsorbed on the negative pressure adsorption tray 5 by the adsorption hole 52.
When the battery piece 1 reaches the position of the sensor at 600mm/s, the laser pulse is given to be triggered by delay, the frequency of a laser pulse signal is 50KHz, the duration is 3.3ms, the length of a pre-split 3 for cutting and slotting the edge of the battery piece 1 is 2mm, and the cutting depth is 90%. And then the cutting path of the battery piece 1 is heated as continuous laser after being converted into a direct current signal.
According to the technical scheme, by utilizing the characteristics of small hot spots and high laser energy, when the hot spots act on the battery piece 1, an uneven temperature field and a temperature gradient are formed around the hot spots, and the temperature gradient induces the generation of thermal stress, so that cracks of the battery piece 1 naturally crack towards the moving direction of the hot spots.
As can be seen from the above embodiment, according to the movement speed of the battery plate 1, the delay trigger time of the laser pulse, the frequency and the duration of the laser pulse signal, the length of the pre-cracking opening 3 and the cutting depth are adjusted accordingly.
FIG. 6 is a graph showing a comparison of a double laser cooled cut fracture surface with a single laser cut fracture surface; the single laser cutting fracture surface is smoother and the loss is smaller through the technical scheme of the application. As shown in fig. 7, which is a graph comparing the coincidence degree of the pre-split of the double laser cooling cutting slot with the split path with the coincidence degree of the pre-split of the single laser cutting slot with the split path, it can be known that the coincidence degree of the pre-split of the single laser cutting slot with the split path is higher.
The single laser solar cell nondestructive cutting method provided by the application can also be applied to wool making sheets and blue films.
In summary, the application provides a single laser solar cell nondestructive cutting method, a controller and a device, which comprise the steps of fixing a cell at a position to be cut; firing the edge of the battery piece along a preset cutting path by utilizing a laser beam emission pulse signal to form a pre-split; wherein, the battery piece and the laser beam move relatively; after a preset time period, the pulse signal emitted by the laser beam is converted into a direct current signal, and the direct current signal heats the battery piece through the tail part of the pre-break, so that hot spots are formed on the battery piece, and thermal stress is formed on the cutting path by the hot spots, so that the battery piece is disconnected along the cutting path. According to the application, the laser burning and heating are carried out on the edge of the photovoltaic cell by using one beam of infrared laser, so that the cell is naturally cracked, in the application, the laser slotting pre-cracking and the laser heating are continuously carried out, no gasification or melting is carried out in the cutting process, no dust is generated, no water cooling is carried out, the damage to the surface of the cell is reduced, the formed hot area is small due to small hot spots, the problem that the slotting pre-cracking and the heating path are not coincident is solved, and the efficiency of the cell after slicing is increased.
It can be understood that the above-provided method embodiments correspond to the above-described apparatus embodiments, and corresponding specific details may be referred to each other and will not be described herein.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. The single laser solar cell nondestructive cutting method is characterized by comprising the following steps of:
fixing the battery piece at a position to be cut;
firing the edge of the battery piece along a preset cutting path by utilizing a laser beam emission pulse signal to form a pre-split; wherein, the battery piece and the laser beam move relatively;
after a preset time period, the pulse signal emitted by the laser beam is converted into a direct current signal, and the direct current signal heats the battery piece through the tail part of the pre-break, so that hot spots are formed on the battery piece, and the hot spots enable thermal stress to be formed on the cutting path, so that the battery piece is disconnected along the cutting path;
the peak power of the pulse signal generated by the laser beam is 2-10 times of the heating power for generating the direct current signal;
the range of the frequency of the pulse signal is 20-80 KHz;
the depth of the pre-split is 60% -80% of the thickness of the battery piece;
the length of the pre-cracking opening is less than or equal to 5mm;
the value range of the diameter of the hot spot is less than or equal to 20um.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
acquiring an electric signal of the distance between the battery pieces by adopting a distance sensor, and determining the distance between the battery pieces and the laser beam according to the electric signal;
when the distance between the battery piece and the laser beam is preset, the laser beam generates a pulse signal and is converted into a direct current signal after lasting for a preset time period to heat the battery piece.
3. A controller, comprising:
a memory having an executable program stored thereon;
a processor for executing said executable program in said memory to implement the steps of the method of claim 1 or 2.
4. The utility model provides a single laser solar wafer does not harm cutting device which characterized in that includes: the controller, laser beam generating device, distance sensor, and negative pressure suction tray according to claim 3;
the negative pressure adsorption tray is used for fixing the battery piece;
the laser beam generating device is used for generating a laser beam;
the distance sensor is arranged at a preset distance at the front end of the laser beam generating device;
the controller is used for receiving a distance signal sent by the distance sensor to control the laser beam generating device to generate a pulse signal, the pulse signal burns the edge of the battery piece along a preset cutting path to form a pre-break, the pulse signal is converted into a direct current signal after a preset time period, the direct current signal heats the battery piece through the tail part of the pre-break, hot spots are formed on the battery piece, and the hot spots enable thermal stress to be formed on the cutting path, so that the battery piece is disconnected along the cutting path.
5. The apparatus of claim 4, wherein the device comprises a plurality of sensors,
a plurality of positioning clamping grooves are formed in the negative pressure adsorption tray; the positioning clamping groove is provided with a plurality of adsorption holes, the adsorption holes are communicated with the air pipe connecting holes, and the air pipe connecting holes are used for generating pressure intensity of the adsorption holes.
6. The device according to claim 4, wherein the negative pressure adsorption tray is further provided with:
and the adjusting knob is used for adjusting the gas adsorption pressure of the adsorption hole.
7. The device according to claim 6, wherein the negative pressure adsorption tray is further provided with: and the pressure digital display meter is used for displaying the gas adsorption pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210519461.4A CN114932324B (en) | 2022-05-12 | 2022-05-12 | Single-laser solar cell nondestructive cutting method, controller and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210519461.4A CN114932324B (en) | 2022-05-12 | 2022-05-12 | Single-laser solar cell nondestructive cutting method, controller and device |
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| CN114932324B true CN114932324B (en) | 2023-08-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07335924A (en) * | 1994-06-10 | 1995-12-22 | Siemens Ag | Preparation of solar module |
| CN111933746A (en) * | 2020-07-10 | 2020-11-13 | 深圳光远智能装备股份有限公司 | Nondestructive laser nondestructive scribing process for solar cell |
| CN112151627A (en) * | 2020-09-18 | 2020-12-29 | 浙江晶科能源有限公司 | Double-sided photovoltaic cell, laser cutting method and photovoltaic module |
| CN213752739U (en) * | 2020-12-31 | 2021-07-20 | 天合光能(义乌)科技有限公司 | Efficient and energy-saving solar cell nondestructive cutting device |
| CN114054972A (en) * | 2020-12-17 | 2022-02-18 | 帝尔激光科技(无锡)有限公司 | Dynamic focusing laser cutting method and device |
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| CN111590214A (en) * | 2020-05-12 | 2020-08-28 | 东方日升新能源股份有限公司 | Photovoltaic cell cutting method and cell manufactured by same |
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| JPH07335924A (en) * | 1994-06-10 | 1995-12-22 | Siemens Ag | Preparation of solar module |
| CN111933746A (en) * | 2020-07-10 | 2020-11-13 | 深圳光远智能装备股份有限公司 | Nondestructive laser nondestructive scribing process for solar cell |
| CN112151627A (en) * | 2020-09-18 | 2020-12-29 | 浙江晶科能源有限公司 | Double-sided photovoltaic cell, laser cutting method and photovoltaic module |
| CN114054972A (en) * | 2020-12-17 | 2022-02-18 | 帝尔激光科技(无锡)有限公司 | Dynamic focusing laser cutting method and device |
| CN213752739U (en) * | 2020-12-31 | 2021-07-20 | 天合光能(义乌)科技有限公司 | Efficient and energy-saving solar cell nondestructive cutting device |
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