Inline connection device and method of photovoltaic thin film battery assembly and laser cutting device

Abstract

The invention relates to an inline device and method of a photovoltaic thin film battery assembly and a laser cutting device, and belongs to the technical field of processing of photovoltaic thin film battery assemblies. The device comprises a focus adjusting assembly and alignment and tracking assemblies symmetrically arranged on the two sides of the focus adjusting assembly, and a light splitting assembly is further arranged between the alignment and tracking assemblies and the focus adjusting assembly. The light splitting assembly is used for splitting and focusing an incident light beam and adjusting the light beam spacing and the light beam position after light splitting and focusing; the focus adjusting assembly is used for adjusting a laser focus; and the alignment and tracking assembly is used for realizing automatic alignment of a target line and real-time tracking of a light beam. According to the invention, the consistency among the split light beams, the equality of the optical paths of the split light beams and the consistency of the diameters of light spots are ensured; the adjustment of the laser focus is realized, and the photoelectric conversion efficiency of the assembly is improved; and the scribing accuracy and stability are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing photovoltaic thin-film battery components, and in particular relates to an inline device and method for photovoltaic thin-film battery components, and a laser cutting device. Background Art

[0002] Currently, the inline process of photovoltaic thin-film battery modules is mainly achieved through laser scribing. During the laser scribing process, how to reduce the laser scribing process cycle, ensure the scribing quality, and improve the overall stability of the equipment are topics of common concern to photovoltaic companies and laser equipment manufacturers. Generally, due to the limited format of small-sized thin-film battery modules, a single cutting head and sample stage can meet the processing requirements by completing specific movements in the X and Y directions driven by high-speed linear motors. These traditional small-format laser processing devices often have excellent guarantee of scribing quality and processing cycle due to their mature and reliable mechanical structure and simple and stable optical light path. If the company has customized processing patterns for the samples to be processed, it can even use a high-precision scanning galvanometer instead of a cutting head. By combining the appropriate X, Y, and Z axes, a powerful DEMO device with highly customized processing patterns can be formed.

[0003] In the laser scribing of thin-film batteries, laser equipment manufacturers use solutions such as mechanical spectrometers, DOE spectrometers, and multi-channel lasers. Mechanical spectrometers and multi-channel lasers are favored for their stability and excellent scribing results. While mechanical spectrometers are complex and require tedious adjustments, they offer stable scribing results. DOE spectrometers offer a simple optical path and easy commissioning, but suffer from poor optical system stability. Multi-channel lasers are simple, reliable, and offer high scribing stability, but are limited by the size of the laser head. While high-speed galvanometers can meet processing cycle times, the complex joints and variability in results result, leading mainstream manufacturers to opt for laser heads. During processing, depending on the weight and size of the sample handling device and cutting head, a processing method such as stepping motion of the sample to be processed and high-speed reciprocating motion of the cutting head is chosen. For medium and large-sized thin-film batteries, due to the bulk of the sample handling device, a stepping motion of the sample and high-speed motion of the cutting head are often used to minimize motion interference and equipment maintenance requirements. Small-sized thin-film batteries, on the other hand, are more suitable for high-speed sample motion and stepping motion of the cutting head. At present, the stepping of the sample to be processed and the high-speed reciprocating movement of the cutting head have become research and development hotspots due to their wide applicability.

[0004] Currently, perovskite thin-film solar cells, a highly efficient photovoltaic material, face numerous challenges in laser scribing large-area modules. While traditional laser scribing technology performs well on small modules, it suffers from slow processing times, inconsistent scribing quality, and poor overall equipment stability when processing large perovskite modules. These issues severely hinder the large-scale application of perovskite photovoltaic modules. Summary of the Invention

[0005] In response to the above problems, the present invention provides an inline device and method for photovoltaic thin-film battery modules, and a laser cutting device.

[0006] A first object of the present invention is to provide an inline device for a photovoltaic thin-film battery assembly, comprising a focus adjustment assembly and alignment and tracking assemblies symmetrically arranged on both sides of the focus adjustment assembly, wherein a light splitting assembly is further provided between the alignment and tracking assembly and the focus adjustment assembly;

[0007] The beam splitting component is used to split and focus the incident light beam, and adjust the beam spacing and beam position after splitting and focusing;

[0008] The focus adjustment component is used to adjust the laser focus;

[0009] The alignment and tracking component is used to realize automatic alignment of the target line and real-time tracking of the light beam.

[0010] In a specific embodiment of the present invention, the light splitting assembly includes a plurality of guide rails, a plurality of motor stators are provided between the guide rails, a plurality of motor movers are slidably provided on the guide rails, a beam splitter and a focusing mirror are fixedly provided on one of the motor movers, a sub-reflector and a focusing mirror are fixedly provided on one of the motor movers, and the motor movers provided with the beam splitter and the focusing mirror and the motor movers provided with the sub-reflector and the focusing mirror constitute a light splitting subassembly;

[0011] A main reflector is provided on one side of the end of both ends of the guide rail, and a motor mover provided with a beam splitter and a focusing mirror is located between the main reflector and the motor mover provided with a sub-reflector and a focusing mirror.

[0012] In a specific embodiment of the present invention, the mirror surface of the main reflector is parallel to and opposite to the mirror surface of the beam splitter, the mirror surface of the beam splitter is oriented in the same direction and is parallel to the mirror surface of the sub-reflector, the focusing mirror is located on one side of the mirror surface of the beam splitter or the sub-reflector, and the straight line where the focusing mirror is located is at an acute angle to the straight line where the beam splitter or the sub-reflector is located.

[0013] In a specific embodiment of the present invention, the motor stator is a semi-I-shaped magnetic workpiece, the motor mover is suspended between a plurality of semi-I-shaped grooves of the motor stator, the motor mover is slidably connected to the guide rail via a mover mounting plate and a slider, the motor mover is mounted on the mover mounting plate, and then the mover mounting plate is mounted on the semi-I-shaped top of the motor stator, and both ends of the mover mounting plate are slidably connected to the guide rail via sliders;

[0014] A fixed workpiece is fixedly mounted on the mover mounting plate, and the beam splitter, the sub-reflector, the focusing mirror and the mover mounting plate are fixedly connected via the fixed workpiece and glue.

[0015] In a specific embodiment of the present invention, the fixed workpiece includes a vertical part and a bottom part, and the vertical part and the bottom part are integrally formed. The vertical part is a wall with a semicircular groove, and the semicircular groove cooperates with the focusing mirror. The bottom part is used to install the beam splitter or the sub-reflector.

[0016] In a specific embodiment of the present invention, the focus adjustment assembly includes a housing, an incident light reflector, a "W"-shaped reflector, a second driving member, and a focus adjustment bracket;

[0017] The "W"-shaped reflector is fixed to the focus adjustment bracket, and a second driving member is provided at both ends of the focus adjustment bracket, and a movable end of the second driving member is connected to the focus adjustment bracket via a spring; and a mounting end of the second driving member is fixed to the top wall surface of the housing;

[0018] The "W"-shaped reflector is located between the incident light reflector and the focus adjustment bracket, and the outer shell is arranged outside the focus adjustment bracket, the "W"-shaped reflector and the incident light reflector.

[0019] In a specific embodiment of the present invention, the incident light reflector is fixedly connected to the inner wall of the housing;

[0020] The housing is provided with a first window cooperating with the incident light reflector, and a second window cooperating with the light beam reflected by the incident light reflector. The second window is located on the top wall of the housing.

[0021] In a specific embodiment of the present invention, the second driving component is a voice coil motor.

[0022] In a specific embodiment of the present invention, the alignment and tracking assembly includes a first driving member, a positioning camera and a laser rangefinder, and the positioning camera and the laser rangefinder are respectively fixedly connected to the slide of the first driving member;

[0023] A camera light source is further provided at one end of the positioning camera. The camera light source and the positioning camera are connected via a coaxial housing, and a lens is provided on the side wall of the coaxial housing.

[0024] In a specific embodiment of the present invention, the orientation of the lens is the same as the orientation of the second window in the focus adjustment assembly.

[0025] In a specific embodiment of the present invention, the first driving component is a servo motor module or a linear motor module.

[0026] In a specific embodiment of the present invention, the inline device of the photovoltaic thin-film battery assembly further includes a light box;

[0027] The light box cover is arranged outside the focus adjustment component, the alignment and tracking component and the light splitting component, and the focus adjustment component, the alignment and tracking component and the light splitting component are all fixed on the inner wall of the light box;

[0028] A plurality of light inlets are provided on the wall surface of the light box.

[0029] In a specific embodiment of the present invention, the bottom of the housing in the focus adjustment assembly is fixedly connected to the bottom wall of the light box;

[0030] The main reflector of the light splitting component is fixed on the side wall of the light box and is arranged opposite to the light entrance;

[0031] The guide rails of the light splitting group and the motor stator are both fixed on the bottom wall of the light box;

[0032] The mounting end of the first driving member of the alignment and tracking assembly is fixed on the side wall of the light box, and the side wall on which the first driving member is mounted is adjacent to the side wall on which the main reflector is mounted.

[0033] A second object of the present invention is to provide an inline method for an inline device of a photovoltaic thin-film battery assembly, comprising a light splitting method, a laser focus adjustment method, automatic alignment of a target line, and a real-time light beam tracking method;

[0034] The light splitting method splits and focuses the incident light beam through a light splitting component, and adjusts the light beam spacing and light beam position after the light splitting and focusing;

[0035] The laser focus adjustment method adjusts the laser focus through a focus adjustment component;

[0036] Automatic alignment of target line and real-time tracking of light beam The method realizes automatic alignment of target line and real-time tracking of light beam through alignment and tracking components.

[0037] A third object of the present invention is to provide a laser cutting device comprising the above-mentioned photovoltaic thin-film battery assembly inline device, a laser source, and a plurality of cutting heads;

[0038] The laser source is arranged outside the inline device, and the cutting head is arranged on the optical path of the laser beam emitted by the inline device.

[0039] Beneficial effects of the present invention:

[0040] The present invention provides an inline device and method for photovoltaic thin-film battery modules, and a laser cutting device. By configuring a light splitting component, the device achieves multi-path splitting of an incident light beam, and ensures consistency between the split light beams, equality of the optical path lengths of the split light beams, and consistency of the spot diameters. This not only achieves the purpose of synchronous cutting of multiple laser beams, improving the cutting efficiency of large-area photovoltaic thin-film battery modules, but also ensures high-precision cutting of large-area photovoltaic thin-film battery modules.

[0041] The laser focus is adjusted by setting the focus adjustment component, which reduces the impact of the laser marking line not being parallel to the edge of the component due to the deviation of the four sides of the component on the accuracy and stability of laser cutting. It ensures that the laser focus is always in the optimal processing position of the perovskite film, reduces the processing quality degradation caused by focus offset, and improves the photoelectric conversion efficiency of the component.

[0042] By setting up the alignment and tracking components, automatic alignment of the target line and real-time tracking of the light beam are achieved, reducing the impact of deformation caused by differences in the thermal expansion coefficient of the perovskite component on the accuracy and stability of laser cutting, effectively improving the accuracy and stability of the marking line;

[0043] Through the combination of the focus adjustment component and the alignment and tracking component, that is, through the adjustment of the position of the "W"-shaped reflector in the focus adjustment component, combined with the automatic alignment and real-time finalization function of the alignment and tracking component on the light beam obtained by splitting, the control of the distance between the cutting head and the photovoltaic thin-film battery component is achieved, which makes up for the shortcomings of traditional lasers that cannot achieve real-time tracking and cannot adjust the distance between the cutting head and the glass plane, resulting in deviations in cutting accuracy.

[0044] The present invention also secures the components of the beam splitter, focus adjustment, and alignment and tracking assemblies by placing the outer housing outside them. This ensures the stability of the inline device while simplifying the optical, mechanical, and electrical structures of traditional laser cutting devices, reducing the complexity and debugging cycle of laser cutting equipment and improving its reliability. While meeting the requirements of real-time beam tracking and adaptive focus adjustment, the size of the beam splitter is reduced, improving the space utilization of the laser cutting equipment.

[0045] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 Shows one of the structural schematic diagrams of an inline device for a photovoltaic thin-film battery assembly according to an embodiment of the present invention;

[0048] Figure 2 A schematic diagram showing the connection between a motor mover, a motor stator and a guide rail in an inline device for a photovoltaic thin-film battery assembly according to an embodiment of the present invention is shown;

[0049] Figure 3 It shows one of the three-dimensional views of an inline device of a photovoltaic thin-film battery assembly according to an embodiment of the present invention;

[0050] Figure 4 shows one of the structural schematic diagrams of the focus adjustment component according to an embodiment of the present invention;

[0051] Figure 5 shows one of the structural schematic diagrams of the focus adjustment component according to an embodiment of the present invention;

[0052] Figure 6 A schematic diagram of a light path of four groups of light paths splitting and focusing according to an embodiment of the present invention is shown;

[0053] Figure 7 The figure shows a rectangular coordinate system established by using the center of the entire eight light beams obtained by splitting and focusing four light paths as the coordinate origin and the left and right offsets of the light beams according to an embodiment of the present invention;

[0054] Figure 8 A schematic diagram showing automatic alignment of a target line and real-time tracking of a light beam according to an embodiment of the present invention is shown;

[0055] Figure 9 A schematic diagram of correction of the entire light beam when deviation occurs during actual processing according to an embodiment of the present invention is shown;

[0056] Figure 10 shows a schematic diagram of focus adjustment according to an embodiment of the present invention;

[0057] Figure 11 A graph showing comparative aging decay rates of perovskite thin film cells utilizing cutting activity according to an embodiment of the present invention;

[0058] In the figure: 10. Positioning and tracking component; 11. First driving member; 12. Camera light source; 13. Laser rangefinder; 14. Positioning camera; 15. Lens; 20. Focus adjustment component; 21. Housing; 22. Incident light reflector; 23. Second driving member; 24. "W"-shaped reflector; 25. Focus adjustment bracket; 30. Spectral component; 31. Guide rail; 32. Motor mover; 321. Mover mounting plate; 322. Slider; 33. Motor stator; 34. Sub-reflector; 35. Beam splitter; 36. Main reflector; 37. Fixed workpiece; 38. Focusing mirror; 40. Light inlet. DETAILED DESCRIPTION

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0060] like Figure 1 As shown, an inline device for a photovoltaic thin-film battery assembly according to the present invention comprises a focus adjustment assembly 20 and an alignment and tracking assembly 10 symmetrically arranged on both sides of the focus adjustment assembly 20, and a light splitting assembly 30 is further provided between the alignment and tracking assembly 10 and the focus adjustment assembly 20;

[0061] The focus adjustment component 20 is used to adjust the laser focus to ensure that the laser focus is always located at the optimal processing position of the photovoltaic thin-film cell, thereby reducing the processing quality degradation caused by focus offset and improving the photoelectric conversion efficiency of the photovoltaic thin-film cell assembly;

[0062] The light splitting assembly 30 is used to split and focus the incident light beam, and to adjust the spacing and position of the light beams after the light splitting and focusing. Adjusting the spacing and position of the light beams after the light splitting and focusing not only improves the processing efficiency, but also ensures the consistency between the light beams, providing a basis for high-precision line marking of photovoltaic thin-film battery modules.

[0063] The alignment and tracking component 10 is used to achieve automatic alignment of the target line and real-time tracking of the light beam;

[0064] The distance between the cutting head and the photovoltaic thin-film battery assembly is controlled by combining the focus adjustment assembly 20 with the alignment and tracking assembly 10;

[0065] The distance between the cutting head and the photovoltaic thin-film battery module is controlled to reduce the impact of differences in thermal expansion coefficients on the laser cutting process, especially the deformation of perovskite thin-film battery modules caused by differences in thermal expansion coefficients. This effectively improves the accuracy and stability of laser line engraving (due to differences in thermal expansion coefficients, different photovoltaic thin-film battery surfaces will have different deformations, which will cause the laser focus position to change, and the distance between the cutting head and the thin-film battery will also change, ultimately reducing the accuracy and stability of laser line engraving).

[0066] In some embodiments of the present invention, the light splitting component 30 includes a plurality of guide rails 31, a plurality of motor stators 33 are provided between the guide rails 31, a plurality of motor movers 32 are slidably provided on the guide rails 31, a beam splitter 35 and a focusing mirror 38 are fixedly provided on one of the motor movers 32, a sub-reflector 34 and a focusing mirror 38 are fixedly provided on one of the motor movers 32, the motor mover 32 provided with the beam splitter 35 and the focusing mirror 38 and the motor mover 32 provided with the sub-reflector 34 and the focusing mirror 38 constitute a light splitting sub-assembly, such a light splitting sub-assembly realizes the splitting and focusing of an incident beam of light into two beams of light, and a plurality of the motor movers 32 constitute a plurality of light splitting sub-assemblies, realizing multiple splitting of a beam of light;

[0067] A main reflector 36 is provided on one side of the end of each end of the guide rail 31. A motor mover 32 provided with a beam splitter 35 and a focusing mirror 38 is located between the main reflector 36 and the motor mover 32 provided with a sub-reflector 34 and a focusing mirror 38, so that the split light beam can be reflected again by the sub-reflector 34.

[0068] The mirror surface of the main reflector 36 is parallel to the mirror surface of the beam splitter 35 and is arranged opposite to each other. The mirror surface of the beam splitter 35 is oriented in the same direction and is parallel to the mirror surface of the sub-reflector 34. The focusing mirror 38 is located on one side of the mirror surface of the beam splitter 35 or the sub-reflector 34, and the straight line where the focusing mirror 38 is located is at an acute angle to the straight line where the beam splitter 35 or the sub-reflector 34 is located. The main reflector 36, the beam splitter 35 and the sub-reflector 34 are arranged as described above so that the light beams obtained by splitting and focusing are parallel, ensuring the equality of the optical path of each split light beam and the consistency of the spot diameter.

[0069] In certain embodiments of the present invention, illustratively, the acute angle is 45 degrees, and the straight line where the mirror surface of the main reflector 36 is located is 45 degrees to the horizontal line, and the focusing mirror 38 is set horizontally. According to the above setting, the straight line where the incident light beam is located is perpendicular to the straight line where the light beam obtained by splitting and focusing is located, ultimately ensuring that the laser beams emitted by all focusing mirrors are parallel to each other and perpendicular to the focus adjustment component 20.

[0070] like Figure 2As shown, in some embodiments of the present invention, for example, the motor stator 33 is a semi-I-shaped magnetic workpiece, and the motor mover 32 is suspended between a number of semi-I-shaped grooves of the motor stator 33. The motor mover 32 is slidably connected to the guide rail 31 through a mover mounting plate 321 and a slider 322. The motor mover 32 is first mounted on the mover mounting plate 321, and then the mover mounting plate 321 is mounted on the semi-I-shaped top of the motor stator 33. Both ends of the mover mounting plate 321 are slidably connected to the guide rail 31 through the slider 322. That is, in the embodiment of the present invention, the number of the guide rails 31 is 2. The combination of the mover mounting plate 321, the slider 322 and the guide rail 31 realizes that the motor stator 33 drives the movement of the motor mover 32.

[0071] The movable mounting plate 321 is fixedly mounted with a fixed workpiece 37, and the beam splitter 35, the sub-reflector 34, the focusing mirror 38 and the movable mounting plate 321 are all fixedly connected through the fixed workpiece 37. In order to further improve the firmness between the fixed workpiece 37 and the beam splitter 35, the sub-reflector 34 and the focusing mirror 38, the fixed workpiece 37 and the beam splitter 35, the sub-reflector 34 and the focusing mirror 38 are bonded by glue, thereby achieving the above The beam splitter 35, the sub-reflector 34, and the focusing mirror 38 are fixed on the motor mover 32, thereby realizing that the motor mover 32 drives the beam splitter 35, the sub-reflector 34, and the focusing mirror 38 to move remotely as a whole, and finally realizes the overall movement of the multi-path light beams after the light splitting and focusing by the motor mover 32, that is, the motor mover 32 drives the beam splitter 35 or the sub-reflector 34 and the focusing mirror 38 to move along the guide rail 31, thereby realizing flexible adjustment of the light beam spacing and light beam position obtained by the light splitting and focusing;

[0072] like Figure 2 As shown, the fixed workpiece 37 includes a vertical part and a bottom part, and the vertical part and the bottom part are integrally formed. The vertical part is a wall with a semicircular groove, and the semicircular groove cooperates with the focusing mirror 38. The bottom part is used to install the beam splitter 35 or the sub-reflector 34 to ensure that the bottom surface remains horizontal to ensure that the light beam obtained after splitting is parallel to the horizontal plane.

[0073] In certain embodiments of the present invention, for example, the guide rail 31 is a linear guide rail 31, the motor stator 33 is a linear electronic stator, the motor mover 32 is a linear motor mover 32, and for example, the linear motor is a micro multi-motor ironless linear motor.

[0074] In certain embodiments of the present invention, the alignment and tracking assembly 10 includes a first driving member 11, a positioning camera 14, and a laser rangefinder 13. The positioning camera 14 and the laser rangefinder 13 are respectively fixedly connected to the slide of the first driving member 11. The first driving member 11 drives the positioning camera 14 and the laser rangefinder 13 to move synchronously. The laser rangefinder 13 is used to accurately measure the distance between the component to be measured and the laser rangefinder 13 without contact.

[0075] A coaxial camera light source 12 is further provided at one end of the positioning camera 14 . The camera light source 12 and the positioning camera 14 are connected via a coaxial housing. A lens 15 is provided on the side wall of the coaxial housing.

[0076] In some embodiments of the present invention, for example, the first driving component 11 is a micro servo motor module or a linear motor module.

[0077] In some embodiments of the present invention, for example, the positioning camera 14 is a CCD positioning camera 14 .

[0078] like Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the focus adjustment assembly 20 includes a housing 21, an incident light reflector 22, a "W"-shaped reflector 24, a second driving member 23 and a focus adjustment bracket 25. The "W"-shaped reflector 24 is fixed to the focus adjustment bracket 25. The focus adjustment bracket 25 is provided with a second driving member 23 at both ends. The movable end of the second driving member 23 is connected to the focus adjustment bracket 25 via a spring, and the mounting end of the second driving member 23 is fixed to the top wall of the housing 21.

[0079] The reason for setting the spring is that when the second driving member 23 is powered off, the "W"-shaped reflector 24 and the focus adjustment bracket 25 will move downward under the action of gravity. In order to overcome the action of gravity, the spring force is used to balance part of the gravity when the "W"-shaped reflector 24 and the focus adjustment bracket 25 are moving, thereby reducing the load on the second driving member 23 and improving the reliability of the focus adjustment assembly 20. The second driving member 23 drives the "W"-shaped reflector 24 to move up and down, thereby achieving adjustment of the laser focus position.

[0080] The focus adjustment bracket 25, the "W"-shaped reflector 24, and the incident light reflector 22 are stacked in sequence, with the "W"-shaped reflector 24 located between the incident light reflector 22 and the focus adjustment bracket 25, and then the outer shell 21 is covered outside the focus adjustment bracket 25, the "W"-shaped reflector 24, and the incident light reflector 22.

[0081] In some embodiments of the present invention, the incident light reflector 22 is fixedly connected to the inner wall of the housing 21, and the housing 21 is provided with a first window that cooperates with the incident light reflector 22. The housing 21 is also provided with a second window that cooperates with the light beam reflected by the incident light reflector 22.

[0082] The first window is provided on each side wall of the housing 21 , and the second window is oriented in the same direction as the lens 15 . For example, the second window is located on the top wall of the housing 21 , and the lens 15 is oriented vertically upward.

[0083] In some embodiments of the present invention, for example, the second driving member 23 is a voice coil motor.

[0084] In certain embodiments of the present invention, the inline device further comprises a light box, wherein the light box cover is arranged outside the focus adjustment component 20, the alignment and tracking component 10 and the spectroscopic component 30, and the focus adjustment component 20, the alignment and tracking component 10 and the spectroscopic component 30 are all fixed on the inner wall of the light box, and a plurality of light inlets 40 are provided on the wall surface of the light box.

[0085] In certain embodiments of the present invention, the guide rail 31 is fixed to the bottom wall of the light box by screws, the motor mover 32 is fixed to the bottom wall of the light box by screws, and the main reflector 36 is fixed to the side wall of the light box and is arranged opposite to the light entrance 40.

[0086] In some embodiments of the present invention, the bottom of the adjustment component housing 21 is fixedly connected to the bottom wall of the light box.

[0087] In some embodiments of the present invention, the mounting end of the first driving member 11 is fixed to the side wall of the light box, and the side wall where the first driving member 11 is mounted is adjacent to the side wall where the primary reflector 36 is mounted.

[0088] In certain embodiments of the present invention, for example, the number of the motor movers 32 is 4, that is, it is composed of two groups of motor movers 32 provided with beam splitters 35 and focusing mirrors 38 and motor movers 32 provided with sub-reflectors 34 and focusing mirrors 38, so as to realize that the incident 4 laser beams pass through the beam splitting component 30 to form 8 laser beams (that is, form 8 laser focal points).

[0089] To illustrate the formation of 8 laser beams in the above embodiment, the four light inlets 40 corresponding to the 4 laser beams are respectively set at the four corners of the light box, ensuring that each light inlet 40 is set opposite to the main reflector 36, see Figure 3 ;

[0090] Figure 6FIG. 4 shows a schematic diagram of the optical paths of the four laser beams entering from the light inlet 40 and passing through the light splitting and focusing of the light splitting component 30. Figure 6 As can be seen, a laser beam is reflected by the main reflector 36 and enters the beam splitter 35. A portion of the laser beam enters the focusing mirror 38, and the other portion is reflected by the sub-reflector 34 and enters the next focusing mirror 38. According to this method, three groups of motor movers 32 with the same structure are configured (i.e., forming two symmetrical splitting components 30, one of the splitting components 30 includes two groups of sub-splitting components, and the two groups of sub-splitting components are symmetrically arranged). According to the above method, four groups of light paths pass through the splitting component 30 of the embodiment of the present invention to achieve an 8-way laser splitting solution. This method can better ensure the equality of the optical path after the focusing mirror 38, ensuring the consistency of the final spot diameter.

[0091] To further illustrate the effect of the light splitting component 30 on adjusting the beam spacing and beam position after the light splitting and focusing, Figure 6 The numbers of each group of beams are shown. The center of the 8 beams is set as the coordinate origin. The rectangular coordinate system is established by the left and right offset of the beams. See Figure 7 . And introduce the following variables:

[0092] d: Spacing between adjacent beams. This parameter is used to control the spacing between laser scribing lines. This parameter is closely related to the battery process and is usually a fixed value.

[0093] S: Beam center position correction value. During the photovoltaic cell coating process, the front glass substrate is heated and cooled, and the deformation of the substrate edge and center is inconsistent, which leads to distortion and deformation of the laser engraved line (usually the P1 engraved line). In addition, during the P1 or P2 laser engraving process, the laser engraved line is not parallel to the glass edge due to the dimensional deviation of the four sides of the glass (glass is a component of photovoltaic thin-film cells) and the accuracy of the equipment. Taking all the above factors into consideration, there will be a certain deviation in the processing position each time during the actual laser engraving process. Therefore, the beam center position correction value is used to correct the marking position parameters;

[0094] The alignment and tracking components 10 are respectively provided on both sides of the focus adjustment component 20. The positioning camera 14 (CCD1 for example) in the alignment and tracking component 10 on one side is coincident with the laser processing track where the L1 beam is located, and the positioning camera 14 (CCD2 for example) in the alignment and tracking component 10 on the other side is coincident with the laser processing track where the R1 beam is located. After the beam spacing d changes, the first driving component 11 can control the CCD1 and CCD2 positioning cameras 14 to coincide with the corresponding laser processing tracks again, ensuring that the positioning reference is consistent, that is, always ensuring that the engraved lines are in the center of the field of view of the positioning camera 14, thereby realizing automatic alignment of the target line (the engraved lines of the front-end laser process, such as the engraved lines produced by the P1 cutting step, indicate that the automatic alignment of the target line is applicable to the cutting or engraving of the back-end laser process). The schematic diagram after specific overlap is shown in FIG. Figure 8 As shown, Figure 8 In the figure, the green lines are the lines of the front-end laser process. After the front-end laser line identification position is located by CCD, a certain offset S0 is added on the basis of this position (to control the line spacing between the laser lines P1, P2, and P3) for line processing. The processing trajectory obtained based on this offset is the theoretical processing trajectory.

[0095] Figure 9 A schematic diagram of the machining trajectory correction after the offset is obtained by calculation and processing of the positioning camera 14 and related control software.

[0096] In the actual processing process, if the offsets of the front laser lines on the component to be processed after CCD and software calculation are s1 and s2 respectively, then the 8 laser beams maintain the same spacing and the overall offset S is calculated according to formula (1);

[0097]

[0098] The eight laser beams maintain the same spacing and an overall offset S (the overall offset of the eight laser beams is controlled by the movement of the motor mover 32). The overall offset S value is offset again on the basis of the theoretical processing trajectory and does not conflict with the offset S0, that is, the tracking correction of the beam is achieved. The specific mathematical expression is shown in formula (2):

[0099]

[0100] Figure 9 In the figure, the gray line is the CCD positioning reference position of the inline device of the embodiment of the present invention, that is, the position zero point, and the green line is the line processed by the front-end laser marking process on the component to be processed. The distance between the line of the front-end process and the position zero point is compared by CCD, and the overall offset is obtained after evaluation and calculation.

[0101] Therefore, the alignment and tracking component 10 of the embodiment of the present invention realizes automatic alignment of the target line and real-time tracking of the light beam through the combination of the first driving member 11, the positioning camera 14 and the laser rangefinder 13, effectively improving the accuracy and stability of the laser marking.

[0102] To further illustrate the focus condition mechanism of the inline device according to an embodiment of the present invention, Figure 10 A schematic diagram of focus adjustment by the focus adjustment component is shown;

[0103] The adjustment process is as follows: If the high-precision laser rangefinder 13 measures L0, adjust the "W"-shaped reflector 24 until the laser focus is exactly on the surface of the photovoltaic cell film. At this time, the position of the second driving member 23 of the "W"-shaped reflector 24 is D0. Now introduce the following parameters: the distance from the focusing mirror 38 to the incident light reflector 22 in the focus adjustment assembly 20 is a certain value D1; the change in the focus position is D2; and the vertical change of the "W"-shaped reflector 24 is D3. It is not difficult to derive formula (3):

[0104] D2=2D3 (3)

[0105] If the measurement value of the laser rangefinder 13 at a certain position is L1, the corresponding focus change is shown in formula (4):

[0106] ΔP=L1-L0 (4)

[0107] The position change of the “W” type reflector 24 is shown in formula (4):

[0108] ΔD=0.5ΔP (5)

[0109] According to the calculation result of the above formula (5), the position of the "W"-shaped reflector 24 is adjusted by the second driving member 23 so that the position of the laser focus is always located at the optimal processing position of the photovoltaic thin-film battery. According to the calculation amount of formula (4), the position of the cutting head is adjusted (the movement amount of the cutting head is equal to the focus change amount), thereby realizing the control of the distance between the cutting head and the photovoltaic thin-film battery assembly. That is, the distance between the cutting head and the photovoltaic thin-film battery assembly is controlled by the combination of the focus adjustment component 20 and the alignment and tracking component 10.

[0110] In certain embodiments of the present invention, a laser cutting device for a volt-volt thin-film battery is further provided, comprising the inline device of the above embodiment, and further comprising a laser source and a cutting head;

[0111] The laser source is arranged outside the inline device, the cutting head is arranged on the optical path of the light beam emitted from the second window, and the cutting head is connected to the third driving member to ensure that the cutting head can move synchronously with the light beam after splitting and focusing.

[0112] In some embodiments of the present invention, for example, the number of the cutting heads is 8.

[0113] In some embodiments of the present invention, for example, the third driving component is a servo motor module or a linear motor module.

[0114] In certain embodiments of the present invention, the laser source obtains multiple light beams through continuous polarization splitting, and the multiple light beams pass through multiple light inlets in the light box in the inline device and are split into multiple laser beams through the splitting component. The multiple laser beams pass through the cutting head to perform multiple synchronous cuts on the photovoltaic thin-film cells.

[0115] The inline device of the above embodiment was used to conduct a laser cutting experiment on a large-area perovskite cell assembly, as follows:

[0116] Example 1:

[0117] 1. Laser cutting P1 (front glass 10*10cm 2 ): Using the laser cutting device of the embodiment of the present invention, the device can split a single laser beam into 8 beams of light through continuous polarization splitting technology. These 8 beams of light act on different areas of the glass at the same time to achieve rapid cutting. Specifically, the laser generated by a high-performance laser first undergoes continuous polarization splitting to obtain 4 beams of light, and then is further divided into 8 beams through the inline device of the present invention. The positioning camera and laser rangefinder in the alignment and tracking component monitor the position and height of the glass in real time, and cooperate with the "W"-shaped reflector in the focus adjustment component to dynamically adjust the focal length to ensure that the laser is always focused on the glass surface and ensure cutting accuracy. This step originally took 8 minutes, but now it can be completed in just 1 minute.

[0118] 2. Cleaning: Use deionized water or special cleaning agent to thoroughly clean the glass surface to remove oil, dust and other impurities, then rinse with deionized water and dry it or blow it dry with nitrogen.

[0119] 3. Preparation of Carrier Transport Layer 1: Electron transport material (e.g., TiO2, SnO2, etc.) solution is evenly applied to the cut glass substrate using spin coating, spray coating, or doctor blade coating. Heat treatment (e.g., annealing) is then performed to remove the solvent and promote crystallization of the material, forming a dense carrier transport layer.

[0120] 4. Preparation of the perovskite layer: A perovskite precursor solution (such as PbI2, MAI, etc. dissolved in an organic solvent) is evenly coated on the carrier transport layer by spin coating, spray coating, or doctor blade coating. The solution is then annealed to decompose and recrystallize the precursor to form a perovskite structured light absorption layer.

[0121] 5. Preparation of carrier transport layer 2 (hole transport layer): Hole transport material (such as Spiro-OMeTAD, PTAA, etc.) solution. On the perovskite layer, the hole transport material solution is coated in a similar manner to the carrier transport layer 1 to form a continuous hole transport layer.

[0122] 6. Cutting P2 (perovskite layer and carrier transport layer): Use the same laser cutting device as cutting P1 to precisely cut the components on which the perovskite layer and carrier transport layer have been deposited to form independent battery cells.

[0123] 7. Electrode Preparation: Conductive materials (such as gold, silver, copper, etc.) or transparent conductive oxides (such as ITO) are deposited on the hole transport layer through methods such as sputtering, evaporation, or printing to form the positive and negative electrodes of the battery. P3 cutting is then performed using the same laser cutting equipment to ensure the precise shape and size of the electrodes.

[0124] 8. Laser Edge Cleaning P4: Use traditional galvanometer scanning laser equipment to clean the edges of components and remove excess material and burrs. This step does not require high cutting accuracy and traditional equipment can meet the requirements.

[0125] 9. Packaging: Use packaging glue (such as EVA, POE, etc.), glass back panel (10*10cm 2 ) for packaging. The cut and processed front glass and back glass are assembled together with encapsulation glue in between, and then the layers are tightly bonded through a lamination process to form a complete perovskite module.

[0126] Comparative Example 1: Compared with Example 1, the laser cutting device in the cutting P1 in step 1, the cutting P2 in step 6, and the cutting P3 in step 7 are replaced with a traditional laser cutting device, and the rest are the same.

[0127] The data on the efficiency of the traditional laser cutting components of multiple samples in Comparative Example 1 and the efficiency of the laser cutting components using the device of the present invention in Example 1 are detailed in Table 1 (Efficiency of the traditional laser cutting components) and Table 2 (Efficiency of the laser cutting components using the device of the present invention). The comparative aging attenuation rate graph of the battery (under 1 standard sunlight, 60-65°C, 1000h) is detailed in Table 1. Figure 11 .

[0128] Table 1

[0129] Sample number <![CDATA[V OC (V)]]> <![CDATA[J SC (mA / cm 2 )]]> FF(%) PCE (%) 1 1.07 20.8 73.7 16.43 2 1.06 21.3 74.8 16.88 3 1.07 20.9 74.2 16.67

[0130] Table 2

[0131] Sample number <![CDATA[V OC (V)]]> <![CDATA[J SC (mA / cm 2 )]]> FF(%) PCE (%) 4 1.09 20.9 77.1 17.57 5 1.08 21.2 75.6 17.32 6 1.08 21.1 76.5 17.43

[0132] It can be seen from Tables 1 and 2 that the perovskite components prepared by the laser cutting device of the present invention have higher photoelectric conversion efficiency than the traditional method, which is mainly reflected in the improvement of the fill factor.

[0133] from Figure 11 As can be seen from the results, perovskite modules fabricated using the present invention's laser cutting device exhibit less attenuation after aging for 1000 hours under 1 standard sunlight and 60-65°C than those fabricated using conventional processing methods. These experimental data demonstrate that the present invention's processing method not only improves the module's photoelectric conversion efficiency but also enhances its photothermal stability.

[0134] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inline device for a photovoltaic thin-film battery assembly, characterized in that: It comprises a focus adjustment component (20) and an alignment and tracking component (10) symmetrically arranged on both sides of the focus adjustment component (20), and a light splitting component (30) is further arranged between the alignment and tracking component (10) and the focus adjustment component (20); The light splitting component (30) is used to split and focus the incident light beam, and to adjust the light beam spacing and light beam position after splitting and focusing; The focus adjustment component (20) is used to adjust the laser focus; The alignment and tracking component (10) is used to realize automatic alignment of the target line and real-time tracking of the light beam.

2. The inline device of photovoltaic thin-film battery assembly according to claim 1, characterized in that: The light splitting component (30) comprises a plurality of guide rails (31), a plurality of motor stators (33) are arranged between the plurality of guide rails (31), a plurality of motor movers (32) are slidably arranged on the guide rails (31), a beam splitter (35) and a focusing mirror (38) are fixedly arranged on one of the motor movers (32), a sub-reflector (34) and a focusing mirror (38) are fixedly arranged on one of the motor movers (32), and the motor mover (32) provided with the beam splitter (35) and the focusing mirror (38) and the motor mover (32) provided with the sub-reflector (34) and the focusing mirror (38) constitute a light splitting sub-component; A main reflector (36) is provided on one side of the end of each end of the guide rail (31), and a motor mover (32) provided with a beam splitter (35) and a focusing mirror (38) is located between the main reflector (36) and the motor mover (32) provided with a sub-reflector (34) and a focusing mirror (38).

3. The inline device of photovoltaic thin-film battery assembly according to claim 2, characterized in that: The mirror surface of the main reflector (36) is parallel to and opposite to the mirror surface of the beam splitter (35); the mirror surface of the beam splitter (35) and the mirror surface of the sub-reflector (34) are oriented in the same direction and are parallel; the focusing mirror (38) is located on one side of the mirror surface of the beam splitter (35) or the sub-reflector (34); and the straight line where the focusing mirror (38) is located forms an acute angle with the straight line where the beam splitter (35) or the sub-reflector (34) is located.

4. The inline device of photovoltaic thin-film battery assembly according to claim 3, characterized in that: The motor stator (33) is a semi-I-shaped magnetic workpiece, the motor mover (32) is suspended between a plurality of semi-I-shaped grooves of the motor stator (33), the motor mover (32) is slidably connected to the guide rail (31) via a mover mounting plate (321) and a slider (322), the motor mover (32) is mounted on the mover mounting plate (321), the mover mounting plate (321) is mounted on the semi-I-shaped top of the motor stator (33), and both ends of the mover mounting plate (321) are slidably connected to the guide rail (31) via the slider (322); A fixed workpiece (37) is fixedly mounted on the mover mounting plate (321), and the beam splitter (35), the sub-reflector (34), the focusing mirror (38) and the mover mounting plate (321) are all fixedly connected via the fixed workpiece (37).

5. The inline device of photovoltaic thin-film battery assembly according to claim 4, characterized in that: The fixed workpiece (37) comprises a vertical portion and a bottom portion, the vertical portion and the bottom portion are integrally formed, the vertical portion is a wall surface with a semicircular groove, the semicircular groove cooperates with the focusing mirror (38), and the bottom portion is used to install the beam splitter (35) or the sub-reflector (34).

6. The inline device of photovoltaic thin-film battery assembly according to claim 1, characterized in that: The focus adjustment assembly (20) comprises a housing (21), an incident light reflector (22), a "W"-shaped reflector (24), a second driving member (23) and a focus adjustment bracket (25); The "W"-shaped reflector (24) is fixed on the focus adjustment bracket (25), and second driving members (23) are provided at both ends of the focus adjustment bracket (25), the movable end of the second driving member (23) is connected to the focus adjustment bracket (25) via a spring, and the mounting end of the second driving member (23) is fixed on the top wall surface of the housing (21); The "W"-shaped reflector (24) is located between the incident light reflector (22) and the focus adjustment bracket (25), and the housing (21) is arranged to cover the focus adjustment bracket (25), the "W"-shaped reflector (24) and the incident light reflector (22).

7. The inline device of photovoltaic thin-film battery assembly according to claim 6, characterized in that: The incident light reflecting mirror (22) is fixedly connected to the inner wall of the housing (21); The housing (21) is provided with a first window cooperating with the incident light reflector (22), and is also provided with a second window cooperating with the light beam reflected by the incident light reflector (22), wherein the second window is located on the top wall surface of the housing (21).

8. The photovoltaic thin-film battery assembly inline device according to claim 6, characterized in that: The second driving member (23) is a voice coil motor.

9. The inline device for photovoltaic thin-film battery assembly according to any one of claims 1 to 8, characterized in that: The alignment and tracking component (10) comprises a first driving member (11), a positioning camera (14) and a laser rangefinder (13), wherein the positioning camera (14) and the laser rangefinder (13) are respectively fixedly connected to the slide table of the first driving member (11); A camera light source (12) is also provided at one end of the positioning camera (14); the camera light source (12) and the positioning camera (14) are connected via a coaxial housing; a lens (15) is provided on the side wall of the coaxial housing.

10. The photovoltaic thin-film battery assembly inline device according to claim 9, characterized in that: The orientation of the lens (15) is the same as the orientation of the second window in the focus adjustment component (20).

11. The photovoltaic thin-film battery assembly inline device according to claim 9, characterized in that: The first driving component (11) is a servo motor module or a linear motor module.

12. The photovoltaic thin-film battery assembly inline device according to claim 1, characterized in that: Also included is a light box; The light box cover is arranged outside the focus adjustment component (20), the alignment and tracking component (10) and the light splitting component (30), and the focus adjustment component (20), the alignment and tracking component (10) and the light splitting component (30) are all fixed on the inner wall of the light box; A plurality of light inlets (40) are provided on the wall surface of the light box.

13. The photovoltaic thin-film battery assembly inline device according to claim 12, characterized in that: The bottom of the housing (21) in the focus adjustment component (20) is fixedly connected to the bottom wall of the light box; The main reflector (36) of the light splitting component (30) is fixed on the side wall of the light box and is arranged opposite to the light entrance (40); The guide rail (31) of the light splitting group and the motor stator (33) are both fixed on the bottom wall of the light box; The mounting end of the first driving member (11) of the alignment and tracking assembly (10) is fixed on the side wall of the light box, and the side wall on which the first driving member (11) is mounted is adjacent to the side wall on which the main reflector (36) is mounted.

14. The method for interconnecting a photovoltaic thin-film battery assembly according to any one of claims 1 to 13, characterized in that: Including the method of splitting light, the method of adjusting the laser focus and the automatic alignment of the target line, and the method of real-time tracking of the light beam; The light splitting method splits and focuses an incident light beam through a light splitting component (30), and adjusts the light beam spacing and light beam position after the light splitting and focusing; The laser focus adjustment method adjusts the laser focus through a focus adjustment component (20); The automatic alignment of a target line and the real-time tracking method of a light beam realize the automatic alignment of a target line and the real-time tracking of a light beam through an alignment and tracking component (10).

15. A laser cutting device, characterized in that: An inline device for a photovoltaic thin-film battery assembly comprising any one of claims 1 to 13, a laser source and a plurality of cutting heads; The laser source is arranged outside the inline device, and the cutting head is arranged on the optical path of the laser beam emitted by the inline device.

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