CN112846536A - Laser low-loss cutting device and method for solar cell - Google Patents
Laser low-loss cutting device and method for solar cell Download PDFInfo
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- CN112846536A CN112846536A CN202110017357.0A CN202110017357A CN112846536A CN 112846536 A CN112846536 A CN 112846536A CN 202110017357 A CN202110017357 A CN 202110017357A CN 112846536 A CN112846536 A CN 112846536A
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- laser
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- solar cell
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- galvanometer
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- 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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a solar cell laser low-loss cutting device and a solar cell laser low-loss cutting method. According to the solar cell laser low-loss cutting device and method provided by the invention, the two ends of the solar cell are cut and grooved, dust, fine lines and the like are not generated basically, the damage to the solar cell is reduced, the generation efficiency of a cell module is improved, the solar cell and the galvanometer do not move relatively, the galvanometer control module controls the on and off of laser and the swinging angles of two motors in the transverse direction and the longitudinal direction of the same two-dimensional plane in the galvanometer, the cutting times can be controlled according to actual requirements, the optimization of a subsequent cutting process is facilitated, and the precision of a cutting notch is also improved.
Description
Technical Field
The invention belongs to the technical field of solar cell slice cutting, and particularly relates to a solar cell slice laser low-loss cutting device and method.
Background
In the solar cell manufacturing industry, in order to improve the power generation power of a cell module, the solar cell needs to be cut into a plurality of pieces with equal areas to manufacture the module, but the damage to the solar cell piece is reduced or avoided as much as possible in the process of cutting the solar cell piece.
The mainstream solar cell cutting technology in the current market is to process a cutting channel penetrating through the surface of a solar cell on the back surface of the solar cell by using laser, and then to break the cell along the laser cutting channel by adopting a mechanical method; the processing method can cause great damage to the battery plate: the laser cutting can damage the passivation layer on the surface of the cell and the silicon wafer, a large amount of dust is generated, the mechanical stress breaking mode can increase fragments in the cutting process, and the manufacturing cost of the assembly is increased. Therefore, there is a need for a cutting technique that can scribe a solar cell and does not damage the solar cell itself.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a solar cell laser low-loss cutting device and method.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
a solar cell laser low-loss cutting device comprises a laser cutting module, a laser radiation heating module and an auxiliary cooling module, wherein the laser cutting module comprises a first optical fiber laser, a beam expanding lens, a vibrating lens, a field lens and a vibrating lens control module, the first optical fiber laser, the beam expanding lens and the vibrating lens are detachably connected through threads in sequence, the vibrating lens is detachably connected with the field lens below the vibrating lens through threads, the first optical fiber laser and the vibrating lens are both connected with the vibrating lens control module, the vibrating lens control module is used for controlling the opening and closing of the first optical fiber laser and adjusting the swinging angle of a motor arranged in the vibrating lens, laser emitted by the first optical fiber laser sequentially passes through the beam expanding lens, the vibrating lens and the field lens and then is focused on a solar cell, the swinging of the motor in the vibrating lens is controlled by the vibrating lens control module to realize that a laser focusing beam moves in a two-dimensional plane where a focusing point is located, the solar cell is respectively cut and grooved at two ends of the solar cell, the laser radiation heating module is used for heating along the cutting and grooving straight line, and the auxiliary cooling module is used for cooling the solar cell along the heating straight line of the laser radiation heating module.
Furthermore, two swing motors are arranged in the vibrating mirror and connected with the vibrating mirror control module, the two swing motors are arranged in the same two-dimensional plane and are respectively arranged along the transverse direction and the longitudinal direction, and the vibrating mirror control module controls and changes the swing angles of the two swing motors in the vibrating mirror to enable the laser focusing beams emitted by the first optical fiber laser to move in the two-dimensional plane where the focusing point is located, so that the two ends of the solar cell piece are respectively cut and grooved.
Furthermore, the laser radiation heating module comprises a second fiber laser, a collimation module and a focusing module, the second fiber laser, the collimation module and the focusing module are sequentially detachably connected together, and laser emitted by the second fiber laser sequentially passes through the collimation module and the focusing module.
Furthermore, the collimating module comprises a collimating lens, the focusing module comprises a focusing lens, the light outlet of the second fiber laser is positioned at a focal length which is one time of the collimating lens, the laser emitted by the second fiber laser is collimated by the collimating lens and then emitted as parallel light, and the parallel light is focused at the back focal length of the focusing lens after being incident.
Furthermore, the diameter of a laser spot of the laser emitted by the second fiber laser sequentially passes through the collimating module and the focusing module is 2-3 mm, the laser power is 200-400W, and the laser heating speed is 400-900 mm/s.
The invention discloses a laser low-loss cutting method of a solar cell, which comprises the following steps:
firstly, placing a solar cell to be cut in a laser cutting area;
secondly, laser emitted by a first fiber laser of the laser cutting module sequentially passes through a beam expander, a galvanometer and a field lens and is focused on the solar cell, and the galvanometer control module controls the swinging angles of two motors in the same two-dimensional plane in the galvanometer to realize that laser focusing beams move in the two-dimensional plane where a focusing point is located, so that grooves are cut at two ends of the solar cell respectively;
thirdly, heating the laser emitted by the second fiber laser to the edge of the solar cell piece along the laser cutting straight line of the laser cutting module after passing through the collimation module and the focusing module;
and step four, the auxiliary cooling module cools the solar cell along the laser heating line of the second fiber laser to the edge of the solar cell.
Further, in the second step, the length of the cutting groove is 1.5 mm-2 mm.
Further, in the third step, the diameter of a laser spot of the laser emitted by the second fiber laser after passing through the collimating module and the focusing module in sequence is 2 mm-3 mm, the laser power is 200W-400W, and the laser heating speed is 400 mm/s-900 mm/s.
Further, in the fourth step, the auxiliary cooling module cools the workpiece along the laser heating line of the laser radiation heating module by using the atomized deionized water.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a solar cell laser low-loss cutting device and method, which comprises a laser cutting module, a laser radiation heating module and an auxiliary cooling module, wherein laser emitted by a first optical fiber laser sequentially passes through a beam expander, a galvanometer and a field lens and then is focused on a solar cell, the galvanometer control module controls the swinging of a motor in the galvanometer to realize that a laser focusing beam moves in a two-dimensional plane where a focusing point is located, so that two ends of the solar cell are respectively cut and grooved, the laser radiation heating module heats along a cutting grooving straight line, and the auxiliary cooling module cools the solar cell along a heating straight line of the laser radiation heating module. The laser low-loss cutting device and the method for the solar cell provided by the invention reduce the damage to the solar cell by cutting and slotting the two ends of the solar cell, the improvement of the generating efficiency of the battery pack is helped to a certain extent, and dust, fine lines and the like are not generated basically in the cutting process, so that the safety of the cutting process is improved, the laser is controlled by the galvanometer to cut and groove, the solar cell and the galvanometer do not need to move relatively in the process of cutting and grooving, meanwhile, the galvanometer control module can control the on and off of the laser and the swinging angles of two motors in the transverse direction and the longitudinal direction on the same two-dimensional plane in the galvanometer, the cutting frequency can be controlled according to actual requirements, the optimization of a subsequent cutting process is facilitated, the precision of a cutting notch is improved, cracks develop according to the crack propagation direction, the linearity is high, and the application prospect is wide.
Drawings
FIG. 1 is a schematic structural diagram of a laser cutting module according to the present invention;
FIG. 2 is a schematic structural view of a laser radiation heating module and an auxiliary cooling module of the present invention.
Detailed Description
The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the scope of the present invention can be clearly and clearly defined.
As shown in fig. 1-2, a solar cell laser low-loss cutting device mainly includes a laser cutting module 10, a laser radiation heating module 20 and an auxiliary cooling module 31, wherein the laser cutting module 10 cuts and forms a groove at two ends of a solar cell, the laser radiation heating module 20 heats the edge of the solar cell along a line marked by the laser cutting module 10, and the auxiliary cooling module 31 cools the edge of the solar cell along a laser heating line of the laser radiation heating module 20.
The laser cutting module 10 mainly includes a first fiber laser 11, a beam expander 12, a galvanometer 13, a field lens 14, and a galvanometer control module 15, the galvanometer control module 15 is connected with the first fiber laser 11, the galvanometer control module 15 controls the on and off of the first fiber laser 11 and the patterns drawn by the galvanometer, the first fiber laser 11, the beam expander 12 and the galvanometer 13 are detachably connected by a thread in sequence, the galvanometer 13 is detachably connected with the field lens 14 positioned below the galvanometer 13 by a thread, the laser emitted by the first fiber laser 11 sequentially passes through the beam expander 12, the galvanometer 13 and the field lens 14 and then is focused on a solar cell, the focusing position of the laser emitted by the first fiber laser 11 on the solar cell can be changed by the galvanometer 13, specifically, the galvanometer 13 is internally provided with two swing motors and connected with the galvanometer control module 15, the two swing motors are arranged in the same two-dimensional plane and are respectively arranged along the transverse direction and the longitudinal direction, and the swing angles of the two swing motors in the vibrating mirror 13 are controlled and changed by the vibrating mirror control module 15, so that the laser beam emitted by the first optical fiber laser 11 moves in the two-dimensional plane where the focus point is located, and the two ends of the solar cell are respectively cut and grooved; the galvanometer control module 15 can control the laser emitted by the first fiber laser 11 to draw a required laser cutting pattern according to requirements, and the galvanometer control module 15 controls the galvanometer 13 to cut two sections of short cutting grooves at two ends of the solar cell through the focusing of the field lens 14, wherein the length of the cutting grooves is 1.5-2 mm.
The laser radiation heating module 20 mainly comprises a second fiber laser 21, a collimating module 22 and a focusing module 23, the second fiber laser 21, the collimating module 22 and the focusing module 23 are detachably connected together in sequence, the collimating module 22 comprises a collimating lens, the focusing module 23 comprises a focusing lens, an optical outlet of the second fiber laser 21 is positioned at a focal length which is one time of the collimating lens, laser emitted by the second fiber laser 21 is collimated by the collimating lens and then emitted as parallel light, the parallel light is focused at a back focal length of the focusing lens after being incident, laser emitted by the second fiber laser 21 passes through the collimating module 22 and the focusing module 23, the diameter of the light spot of the laser radiation heating module 20 is changed into 2 mm-3 mm, the laser power is 200W-400W, the light spot is linearly heated along the cutting groove of the first fiber laser 11, and the heating speed is 400 mm/s-900 mm/s.
A solar cell laser low-loss cutting method comprises the following steps:
firstly, placing a solar cell to be cut in a laser cutting area;
secondly, laser emitted by a first fiber laser 11 of the laser cutting module 10 sequentially passes through a beam expander 12, a vibrating mirror 13 and a field lens 14 and is focused on the solar cell slice, the focusing position of the laser emitted by the first fiber laser 11 on the solar cell slice can be changed through the movement of the vibrating mirror 13, the vibrating mirror control module 15 can control the laser of the first fiber laser 11 to draw a required laser cutting pattern according to requirements, and the vibrating mirror 13 is controlled by the vibrating mirror control module 15 to cut two sections of shorter cutting grooves at two ends of the solar cell slice through the focusing of the field lens 14;
step three, the laser emitted by the second fiber laser 21 passes through the collimation module 22 and the focusing module 23 and then is heated to the edge along the laser cutting straight line of the laser cutting module 10;
and step four, the auxiliary cooling module 31 cools the solar cell along the laser heating line of the second optical fiber laser 21 to the edge of the solar cell, the laser heating module 10 and the auxiliary cooling module 31 can enable the surface of the solar cell to have a temperature gradient difference, and when the thermal stress is greater than the breaking strength of the solar cell, the solar cell can break along the notch cut by the laser cutting module 10.
In the fourth step, the auxiliary cooling module 31 cools the laser heating line of the laser radiation heating module 20 by using the atomized deionized water.
The parts of the invention not specifically described can be realized by adopting the prior art, and the details are not described herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A solar cell laser low-loss cutting device is characterized by comprising a laser cutting module, a laser radiation heating module and an auxiliary cooling module, wherein the laser cutting module comprises a first optical fiber laser, a beam expanding lens, a galvanometer, a field lens and a galvanometer control module, the first optical fiber laser, the beam expanding lens and the galvanometer are detachably connected in sequence through threads, the galvanometer and the field lens positioned below the galvanometer are detachably connected through threads, the first optical fiber laser and the galvanometer are both connected with the galvanometer control module, the galvanometer control module is used for controlling the opening and closing of the first optical fiber laser and adjusting the swing angle of a motor arranged in the galvanometer, laser emitted by the first optical fiber laser sequentially passes through the beam expanding lens, the galvanometer and the field lens and then is focused on a solar cell, the swing of the motor in the galvanometer control module is used for controlling the swing of the motor in the galvanometer to realize that laser focusing light beams move in a two-dimensional plane where a, the solar cell is respectively cut and grooved at two ends of the solar cell, the laser radiation heating module is used for heating along the cutting and grooving straight line, and the auxiliary cooling module is used for cooling the solar cell along the heating straight line of the laser radiation heating module.
2. The solar cell laser low-loss cutting device according to claim 1, wherein two swing motors are arranged in the vibrating mirror and connected with the vibrating mirror control module, the two swing motors are in the same two-dimensional plane, and the vibrating mirror control module controls and changes the swing angles of the two swing motors in the vibrating mirror so that the laser beam emitted by the first fiber laser moves in the two-dimensional plane where the focus point is located, thereby realizing the purpose of cutting grooves at two ends of the solar cell respectively.
3. The solar cell laser low-loss cutting device as claimed in claim 1, wherein the laser radiation heating module comprises a second fiber laser, a collimation module and a focusing module, the second fiber laser, the collimation module and the focusing module are detachably connected together in sequence, and laser emitted by the second fiber laser sequentially passes through the collimation module and the focusing module.
4. The solar cell laser low-loss cutting device according to claim 3, wherein the collimating module comprises a collimating lens, the focusing module comprises a focusing lens, the light outlet of the second fiber laser is located at a focal length twice of the collimating lens, the laser light emitted by the second fiber laser is collimated by the collimating lens and then emitted as parallel light, and the parallel light is incident and then focused at the back focal length of the focusing lens.
5. The solar cell laser low-loss cutting device according to claim 3, wherein the laser spot size of the laser emitted by the second fiber laser after passing through the collimating module and the focusing module in sequence is 2mm to 3mm, the laser power is 200W to 400W, and the laser heating speed is 400mm/s to 900 mm/s.
6. A solar cell laser low-loss cutting method is characterized in that laser low-loss cutting is carried out by adopting the solar cell laser low-loss cutting device according to any one of claims 1 to 5, and the method comprises the following steps:
firstly, placing a solar cell to be cut in a laser cutting area;
secondly, laser emitted by a first fiber laser of the laser cutting module sequentially passes through a beam expander, a galvanometer and a field lens and is focused on the solar cell, and the galvanometer control module controls the swinging angles of two motors in the same two-dimensional plane in the galvanometer to realize that laser focusing beams move in the two-dimensional plane where a focusing point is located, so that grooves are cut at two ends of the solar cell respectively;
thirdly, heating the laser emitted by the second fiber laser to the edge of the solar cell piece along the laser cutting straight line of the laser cutting module after passing through the collimation module and the focusing module;
and step four, the auxiliary cooling module cools the solar cell along the laser heating line of the second fiber laser to the edge of the solar cell.
7. The method for low-loss laser cutting of solar cells according to claim 6, wherein in the second step, the length of the cutting groove is 1.5 mm-2 mm.
8. The solar cell laser low-loss cutting method according to claim 6, wherein in the third step, the diameter of a laser spot of the laser emitted by the second fiber laser after passing through the collimating module and the focusing module in sequence is 2mm to 3mm, the laser power is 200W to 400W, and the laser heating speed is 400mm/s to 900 mm/s.
9. The laser low-loss cutting method for the solar cell piece as claimed in claim 6, wherein in the fourth step, the auxiliary cooling module utilizes atomized deionized water to cool along the laser heating line of the laser radiation heating module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017357.0A CN112846536A (en) | 2021-01-07 | 2021-01-07 | Laser low-loss cutting device and method for solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017357.0A CN112846536A (en) | 2021-01-07 | 2021-01-07 | Laser low-loss cutting device and method for solar cell |
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| Publication Number | Publication Date |
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| CN112846536A true CN112846536A (en) | 2021-05-28 |
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| CN202110017357.0A Pending CN112846536A (en) | 2021-01-07 | 2021-01-07 | Laser low-loss cutting device and method for solar cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799488A (en) * | 2022-05-26 | 2022-07-29 | 卡门哈斯激光科技（苏州）有限公司 | Method for removing PET blue film of power battery with assistance of laser |
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| JP2007152958A (en) * | 2005-12-05 | 2007-06-21 | Foxsemicon Intergated Technology Inc | Laser cutting apparatus |
| WO2007119740A1 (en) * | 2006-04-13 | 2007-10-25 | Toray Engineering Co., Ltd. | Scribing method, scribing apparatus, and scribed substrate scribed by the method or apparatus |
| CN101121220A (en) * | 2006-08-11 | 2008-02-13 | 富士迈半导体精密工业（上海）有限公司 | Method for cutting crisp material substrate |
| US20180186678A1 (en) * | 2015-08-10 | 2018-07-05 | Saint-Gobain Glass France | Method for cutting a thin glass layer |
| CN110732782A (en) * | 2019-11-20 | 2020-01-31 | 苏州沃特维自动化系统有限公司 | laser equipment for splitting battery piece |
-
2021
- 2021-01-07 CN CN202110017357.0A patent/CN112846536A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007152958A (en) * | 2005-12-05 | 2007-06-21 | Foxsemicon Intergated Technology Inc | Laser cutting apparatus |
| WO2007119740A1 (en) * | 2006-04-13 | 2007-10-25 | Toray Engineering Co., Ltd. | Scribing method, scribing apparatus, and scribed substrate scribed by the method or apparatus |
| CN101121220A (en) * | 2006-08-11 | 2008-02-13 | 富士迈半导体精密工业（上海）有限公司 | Method for cutting crisp material substrate |
| US20180186678A1 (en) * | 2015-08-10 | 2018-07-05 | Saint-Gobain Glass France | Method for cutting a thin glass layer |
| CN110732782A (en) * | 2019-11-20 | 2020-01-31 | 苏州沃特维自动化系统有限公司 | laser equipment for splitting battery piece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799488A (en) * | 2022-05-26 | 2022-07-29 | 卡门哈斯激光科技（苏州）有限公司 | Method for removing PET blue film of power battery with assistance of laser |
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