Laser marking apparatus and method

Abstract

A laser marking apparatus, comprising: a movable positioning module (100), a laser marking module (200), and a suction fixing module (300). The laser marking module is slidably connected to the movable positioning module and is driven by the movable positioning module to perform vertical movement. The suction fixing module comprises a suction fixing assembly (310) and a first driving assembly (320). One end of the first driving assembly is fixedly connected to the laser marking module, and the other end is mated with the suction fixing assembly to drive the suction fixing assembly to perform vertical movement. The suction fixing assembly suctions and fixes a marking area of a glass solar cell to be marked, the glass solar cell extending in a horizontal direction. The laser marking module is connected to the movable positioning module and is driven by the movable positioning module to perform vertical movement, so as to implement primary positioning. The suction fixing assembly is driven by the first driving assembly to perform vertical movement, so as to implement secondary positioning on the suctioned and fixed glass solar cell. The apparatus combines coarse positioning and fine positioning to enable precise adjustment of the flatness and depth of focus of the marking area of the product, thus meeting the flatness requirements for high-precision laser marking. The invention further relates to a laser marking method.

Description

Laser marking device and method Technical Field

[0001] This invention relates to the field of laser marking equipment technology, and in particular to a laser marking device and method. Background Technology

[0002] Current photovoltaic glass solar cells are typically 2-4mm thick, with planar dimensions generally ranging from 2000*1000mm, 2000*1600mm, and 2400*1200mm. Their thinness and large size naturally lead to warping, meaning the thickness direction of the glass cell is not perfectly flat, with localized warping reaching ±0.3mm / 300mm or even greater. This is unacceptable in high-precision automated equipment, especially in the field of high-precision laser marking. Due to the short depth of focus in laser marking, the optimal working range in the thickness direction is often required to be within 0.1-0.5mm. In this case, the flatness of the product in the thickness direction (Z-direction) of the working area must reach ±0.05mm or even less to ensure marking quality.

[0003] Currently, there are also methods for leveling glass solar cells. The solution is to use a uniformly distributed shaping platform and uniformly distributed suction cups evenly distributed across the entire XY plane of the product. The entire product is laid flat on the shaping platform by adsorption through the suction cups. A high-precision Z-axis module is used to lift the laser to adjust the distance between the laser's focal plane and the product so that its focal depth is within a suitable range.

[0004] While leveling the entire product can achieve Z-axis leveling, the large product size makes it difficult to achieve the required flatness with a single shaping platform, and the cost is high. Using multiple evenly distributed shaping platforms requires adjusting the flatness and height of each platform, proportionally increasing the adjustment cost and operational difficulty. Adjusting the distance between the laser focal plane and the product using a high-precision Z-axis module to raise and lower the laser can achieve laser marking to some extent. However, due to inherent positioning accuracy and repeatability deviations in the Z-axis module, real-time closed-loop feedback between its Z-axis movement and the product distance is not achieved. Furthermore, deviations can occur during the manufacturing and installation of the shaping platform, as well as between different products, and these deviations also fail to create a closed-loop feedback mechanism with the Z-axis module. This is not feasible in applications requiring high laser marking precision. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a laser marking device and method to solve the problem that large glass solar cells, due to their thinness and large size, often exhibit local warping, resulting in poor laser marking accuracy due to their poor flatness.

[0006] In a first aspect, the present invention provides a laser marking device, the laser marking device comprising: a moving positioning module, a laser marking module, and an adsorption fixing module;

[0007] The laser marking module is slidably connected to the mobile positioning module and is driven to rise and fall by the mobile positioning module;

[0008] The adsorption and fixing module includes an adsorption and fixing component and a first driving component. The first driving component is mounted on the laser marking module. The driving end of the first driving component is connected to the adsorption and fixing component to drive the adsorption and fixing component to rise and fall. The adsorption and fixing component adsorbs and fixes the marking area of ​​the glass solar cell to be marked. The glass solar cell to be marked, which is adsorbed and fixed by the adsorption and fixing component, extends in the horizontal direction.

[0009] The laser marking module is configured to be connected to and driven by the mobile positioning module to move up and down to perform a primary positioning of the glass solar cell to be marked; the adsorption and fixing component is configured to be driven by the first driving component to move up and down to perform a secondary positioning of the adsorbed and fixed glass solar cell to be marked.

[0010] In some embodiments, the mobile positioning module includes a base, a moving shaft, and a second drive component;

[0011] The movable shaft is vertically mounted on the base, and the laser marking module is slidably connected to the movable shaft;

[0012] The second drive assembly is mounted on the end of the movable shaft and is configured to mate with the laser marking module to drive the laser marking module to slide and move up and down on the movable shaft.

[0013] In some embodiments, the mobile positioning module further includes a guide component;

[0014] The guide assembly includes at least two slide rails fixed to the base, the at least two slide rails being parallel to the moving axis and symmetrically distributed on both sides of the moving axis;

[0015] The laser marking module is slidably connected to each of the slide rails.

[0016] In some embodiments, the laser marking device further includes a control module, the motion positioning module further includes a first displacement sensing component, and the control module is signal-connected to the first displacement sensing component and the second driving component respectively;

[0017] The first displacement sensing component is installed on the side of the moving shaft. The first displacement sensing component is configured to monitor in real time the position data of the glass battery sheet to be marked adsorbed on the adsorption fixing component fixedly connected to the laser marking module, and transmit the position data signal to the control module.

[0018] The control module is configured to control the second driving component to drive the laser marking module to rise and fall based on the received position data, so as to adjust the focal depth of the laser marking module in the vertical direction of the glass battery to be marked.

[0019] In some embodiments, the laser marking module includes a mounting base and a laser assembly;

[0020] The mounting base is slidably connected to the mobile positioning module, and the laser component is fixed on the mounting base;

[0021] The adsorption and fixing module is connected to the end of the laser marking module, and the laser emitting end of the laser component faces the bottom surface of the glass battery sheet to be marked, which is adsorbed and fixed on the adsorption and fixing module.

[0022] In some embodiments, the laser assembly includes a laser, a collimating lens, and a galvanometer.

[0023] The laser is fixed to the mounting base, and the laser is configured to provide a laser source;

[0024] One end of the collimating lens is connected to the emitting end of the laser, and the collimating lens is configured to convert the laser beam emitted by the laser into a parallel beam;

[0025] The other end of the collimating lens is connected to the galvanometer, which is configured to provide marking compatibility on the marking area for laser marking. The glass solar cell to be marked, which is adsorbed and fixed by the adsorption and fixing module, is located above the galvanometer.

[0026] In some embodiments, the laser marking module further includes a dust collection component, which is installed at the laser marking area of ​​the laser marking module;

[0027] The dust collection component is configured to collect dust generated during the marking process.

[0028] In some embodiments, the dust collection assembly includes a dust collection head and an air knife;

[0029] The dust collection head is fixedly connected to the galvanometer, and the dust collection head is configured to collect the dust generated during the marking process;

[0030] The air knife is fixedly connected to the dust collection head, and the air knife is configured to blow away the dust left on the surface of the galvanometer.

[0031] In some embodiments, the dust collection head wraps around the galvanometer and one end of the dust collection head is fixed to the end face of the galvanometer;

[0032] The dust collection head has an opening on its circumferential surface that is flush with the outer circumferential surface of the galvanometer. The air knife is installed at the opening, and the air outlet of the air knife faces the galvanometer.

[0033] In some embodiments, the adsorption and fixing assembly includes a mounting component, a suction cup, and a suction cup tube connector. The mounting component is coupled to the first driving component and is driven by the first driving component. The suction cup and the suction cup tube connector are both mounted on the mounting component, and the suction cup and the suction cup tube connector are in communication.

[0034] The suction cup is configured to adsorb the marking area of ​​the glass solar cell to be marked, and to pull the glass solar cell to be marked down to the top surface of the mounting component. The top surface of the mounting component is configured as a Z-axis local shaping reference surface for the glass solar cell to be marked.

[0035] In some embodiments, the laser marking device further includes a control module, the adsorption and fixing module includes a second displacement sensing component, and the control module is signal-connected to the second displacement sensing component and the first driving component respectively;

[0036] The second displacement sensing component is configured to monitor in real time the distance between the light-emitting surface of the laser marking module and the glass battery sheet to be marked that is adsorbed and fixed by the adsorption and fixing component, and to feed back the distance to the control module;

[0037] The control module is configured to: based on the distance, control the first driving component to drive the adsorption fixing component to move the focal plane of the marking area of ​​the glass battery cell to be marked.

[0038] In a second aspect, the present invention also provides a laser marking method, employing the laser marking apparatus as described in the first aspect, the method comprising:

[0039] After the glass solar cell to be marked is placed in the preset position in the laser marking device, the adsorption and fixing component is activated to adsorb and fix the marking area of ​​the glass solar cell to be marked.

[0040] The control module drives the laser marking module to move to the first position for coarse positioning.

[0041] The first driving component is controlled to drive the adsorption and fixing module to move to the second position for precise positioning.

[0042] In some embodiments, the control of the mobile positioning module to drive the laser marking module to move to the first position for coarse positioning includes:

[0043] The position data of the glass battery cell to be marked is obtained based on the first displacement sensing component in the mobile positioning module;

[0044] Based on the location data, the mobile positioning module is controlled to drive the laser marking module to rise and fall, so as to adjust the focal depth of the laser marking module in the vertical direction of the glass battery sheet to be marked;

[0045] The step of controlling the first driving component to drive the adsorption and fixing module to move to the second position for precise positioning includes:

[0046] The distance between the light-emitting surface of the laser marking module and the glass battery sheet to be marked, which is adsorbed and fixed by the adsorption and fixing component, is obtained based on the second displacement sensing component.

[0047] Based on the distance control, the first driving component drives the adsorption fixing component to move the focal plane of the marking area of ​​the glass battery cell to be marked.

[0048] The above-described one or more embodiments of the present invention have at least the following beneficial effects:

[0049] This invention provides a laser marking device and method. The device includes a moving positioning module, a laser marking module, and an adsorption fixing module. The laser marking module is slidably connected to the moving positioning module and is driven to move up and down by the moving positioning module. The adsorption fixing module includes an adsorption fixing component and a first driving component. One end of the first driving component is fixedly connected to the laser marking module, and the other end is engaged with the adsorption fixing component to drive the adsorption fixing component to move up and down. The adsorption fixing component adsorbs and fixes the marking area of ​​the glass battery cell to be marked, and the glass battery cell to be marked is extended horizontally. The laser marking module is configured to be connected to and driven to move up and down by the moving positioning module to perform primary positioning of the glass battery cell to be marked. The adsorption fixing component is configured to be driven to move up and down by the first driving component to perform secondary positioning of the adsorbed and fixed glass battery cell to be marked. By using a two-stage positioning method instead of a single Z-axis lifting and positioning, the combination of coarse and fine positioning can accurately adjust the flatness and depth of focus of the marking area of ​​the product, meeting the flatness requirements of high-precision laser marking.

[0050] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0051] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0052] Figure 1 is a perspective view of a laser marking device provided in one embodiment of the present invention;

[0053] Figure 2 is a schematic diagram showing the setting position of the first displacement sensing component in a laser marking device provided in one embodiment of the present invention;

[0054] Figure 3 is a schematic diagram of the structure of the laser marking module in a laser marking device provided in one embodiment of the present invention;

[0055] Figure 4 is a schematic diagram of the structure of the laser component in the laser marking device provided in one embodiment of the present invention;

[0056] Figure 5 is a flowchart of a laser marking method provided in one embodiment of the present invention;

[0057] Figure 6 is a flowchart of a preferred embodiment of the laser marking method provided by one embodiment of the present invention;

[0058] The components are as follows: 100, Motion Positioning Module; 110, Base; 120, Motion Axis; 130, Second Drive Component; 140, Guide Component; 141, Slide Rail; 150, First Displacement Sensing Component; 200, Laser Marking Module; 210, Mounting Base; 220, Laser Component; 221, Laser; 222, Collimating Lens; 223, Galvanometer; 230, Dust Collection Component; 231, Dust Collection Head; 232, Air Knife; 233, Dust Blowing Pipe Connector; 234, Dust Collector; 300, Adsorption Fixing Module; 310, Adsorption Fixing Component; 311, Mounting Component; 312, Suction Cup; 313, Suction Cup Pipe Connector; 320, First Drive Component; 330, Second Displacement Sensing Component; 400, Cable Carrier Component; 410, Cable Carrier Mounting Plate; 420, Cable Carrier. Detailed Implementation

[0059] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0060] As described in the background section, current photovoltaic glass solar cells are thin and large in planar dimensions, resulting in warping under natural conditions. However, high-precision laser marking requires extremely high flatness due to the depth of focus, and warped glass solar cells cannot meet these requirements. Current methods for leveling glass solar cells involve laying the entire product flat on a shaping table for leveling. However, due to the large size of the glass solar cells, a single shaping table is extremely expensive. Using multiple separate shaping platforms significantly increases the setup cost and operational complexity.

[0061] To address the aforementioned issues, this invention creatively proposes a laser marking device and method. An adsorption and fixing module for adsorbing and fixing glass solar cells is fixedly connected to a laser marking module. The laser marking module first performs large-step, rapid coarse positioning by adjusting its distance from the glass solar cell under the drive of a moving positioning module. Then, the first driving component in the adsorption and fixing module drives the adsorption and fixing component adsorbing the glass solar cell to move, further adjusting the distance between the laser marking module and the product for small-step, fine positioning. Through the combination of coarse and fine positioning, the depth of focus of the marking area on the glass solar cell is adjusted, thereby ensuring that the marking area meets the flatness requirements for high-precision laser marking.

[0062] The present invention will be specifically described below through specific embodiments.

[0063] Example 1: This example provides a laser marking device. Referring to Figure 1, the laser marking device includes: a moving positioning module 100, a laser marking module 200, and an adsorption fixing module 300.

[0064] The laser marking module 200 is slidably connected to the mobile positioning module 100 and is driven to rise and fall by the mobile positioning module 100;

[0065] The adsorption and fixing module 300 includes an adsorption and fixing component 310 and a first driving component 320. The first driving component 320 is mounted on the laser marking module 200. The driving end of the first driving component 320 is connected to the adsorption and fixing component 310 to drive the adsorption and fixing component 310 to rise and fall. The adsorption and fixing component 310 adsorbs and fixes the marking area of ​​the glass solar cell to be marked. The glass solar cell to be marked, which is adsorbed and fixed by the adsorption and fixing component 310, extends in the horizontal direction.

[0066] The laser marking module 200 is configured to be connected to and driven by the mobile positioning module 100 to perform a primary positioning of the glass battery sheet to be marked; the adsorption and fixing component 310 is configured to be driven by the first driving component 320 to perform a secondary positioning of the adsorbed and fixed glass battery sheet to be marked.

[0067] In some embodiments, the mobile positioning module 100 includes a base 110, a moving shaft 120, and a second drive assembly 130;

[0068] The movable shaft 120 is vertically mounted on the base 110, and the laser marking module is slidably connected to the movable shaft;

[0069] The second driving component 130 is mounted on the end of the moving shaft 120. The second driving component 130 is configured to mate with the laser marking module 200 to drive the laser marking module 200 to slide and rise on the moving shaft 120. By sliding and rising on the moving shaft 120, the movement direction of the laser marking module 200 can be limited by the setting of the moving shaft 120, thereby controlling the distance in the Z direction between the laser marking module 200 and the glass battery sheet to be marked, which is adsorbed and fixed by the adsorption and fixing module 300 fixed on the laser marking module 200. The second driving component 130 can be a servo motor, a cylinder, or any other component or device capable of driving the laser marking module 200 to slide and rise on the moving shaft 120. This embodiment does not specifically limit this. For example, the second drive component 130 is a servo motor, which is mounted on the end of the moving shaft 120 via a flange. Its drive end is connected to the laser marking module 200 to provide power for the sliding of the laser marking module 200 on the moving shaft 120.

[0070] Preferably, the mobile positioning module 100 further includes a guide component 140;

[0071] The guide assembly 140 includes at least two slide rails 141 fixed to the base 110, the at least two slide rails 141 being parallel to the moving axis 120 and symmetrically distributed on both sides of the moving axis 120.

[0072] The laser marking module 200 is slidably connected to each of the slide rails 141. By symmetrically arranging slide rails 141 parallel to the moving shaft 120 on both sides of the moving shaft 120, and with each slide rail 141 slidably connected to the laser marking module 200, the load and torque of the moving shaft 120 can be shared, and the lifting and lowering of the laser marking module 200 can be guided and stabilized.

[0073] In some embodiments, referring to Figures 1 and 2, the laser marking device further includes a control module (not shown), and the motion positioning module 100 further includes a first displacement sensing component 150. The control module is signal-connected to the first displacement sensing component 150 and the second driving component 130, respectively.

[0074] The first displacement sensing component 150 is installed on the side of the moving shaft 120. The first displacement sensing component 150 is configured to monitor in real time the position data of the glass battery sheet to be marked adsorbed on the adsorption fixing component 310 which is fixedly connected to the laser marking module 200, and transmit the position data signal to the control module.

[0075] The control module is configured to control the second drive component 130 to drive the laser marking module 200 to rise and fall based on the received position data, so as to adjust the focal depth of the laser marking module 200 in the vertical direction of the glass battery cell to be marked.

[0076] Specifically, referring to Figure 2, a sliding block is slidably mounted on the moving shaft 120, and the laser marking module 200 is fixed on the sliding block. A sensing plate matching the first displacement sensing component 150 is mounted on the sliding block. There are three sets of the first displacement sensing components 150, which provide near-travel limit, far-travel limit, and origin sensing for the moving positioning module 100 by sensing the sensing plate on the sliding block. The three sets of first displacement sensing components 150 are mounted on a sensor mounting base, which is mounted on the main body. Alternatively, the sensing plate matching the first displacement sensing component 150 can be mounted on the surface of the laser marking module 200 facing the moving shaft 120. Simultaneously, the mounting position of the sensor mounting base on the moving shaft 120 can be adjusted, or the size of the sensor mounting base can be changed, so that the first displacement sensing component 150 can sense the sensing plate mounted on the laser marking module 200, thereby providing near-travel limit, far-travel limit, and origin sensing for the moving positioning module 100.

[0077] In some embodiments, as shown in FIG1 and FIG3, the laser marking module 200 includes a mounting base 210 and a laser component 220;

[0078] The mounting base 210 is slidably connected to the mobile positioning module 100, and the laser component 220 is fixed on the mounting base 210;

[0079] The adsorption and fixing module 300 is connected to the end of the laser marking module 200, and the laser emitting end of the laser component 220 faces the bottom surface of the glass battery sheet to be marked, which is adsorbed and fixed on the adsorption and fixing module 300. For example, the mounting base 210 is slidably connected to the moving shaft 120 of the moving positioning module 100, and the second driving component 130 drives the mounting base 210 to slide, thereby causing the laser marking module 200 to rise and fall as a whole.

[0080] In some embodiments, as shown in FIG4, the laser assembly 220 includes a laser 221, a collimating lens 222 and a galvanometer 223;

[0081] The laser 221 is fixed to the mounting base 210, and the laser 221 is configured to provide a laser source;

[0082] One end of the collimating lens 222 is connected to the emitting end of the laser 221, and the collimating lens 222 is configured to convert the laser beam emitted by the laser 221 into a parallel beam;

[0083] The other end of the collimating lens 222 is connected to the galvanometer 223, which is configured to provide marking compatibility across the marking area for laser marking. The glass solar cell to be marked, adsorbed and fixed by the adsorption and fixing module 300, is located above the galvanometer 223. The galvanometer 223 provides marking compatibility across the marking area for laser marking, and the marking range can be arbitrarily selected between its minimum and maximum marking area.

[0084] In some embodiments, the laser marking module 200 further includes a dust collection component 230, which is installed at the laser marking area of ​​the laser marking module 200;

[0085] The dust collection assembly 230 is configured to collect dust generated during the marking process. The dust collection assembly 230 collects dust left behind at the galvanometer 223 after laser marking to prevent interference with the laser beam.

[0086] In some embodiments, the dust collection assembly 230 includes a dust collection head 231 and an air knife 232;

[0087] The dust collection head 231 is fixedly connected to the galvanometer 223, and the dust collection head 231 is configured to collect dust generated during the marking process;

[0088] The air knife 232 is fixedly connected to the dust collection head 231, and the air knife 232 is configured to blow away the dust left on the surface of the galvanometer 223.

[0089] In some embodiments, the dust collection head 231 encloses the galvanometer 223 and one end of the dust collection head 231 is fixed to the end face of the galvanometer 223;

[0090] The dust collection head 231 has an opening on its circumferential surface that is flush with the outer circumferential surface of the galvanometer 223. The air knife 232 is installed at the opening, with its air outlet facing the galvanometer 223. For example, one end of the dust collection head 231 wraps around the galvanometer 223 in the Z direction (vertical direction) and is fixed to the galvanometer 223 in the XY plane (top horizontal plane) for collecting dust generated during the marking process. The dust extraction port of the dust collection head 231 is connected to the suction port of the dust collector 234, and the collected dust is concentrated in the dust collector 234 for easy emptying. The circumferential surface of the dust collection head 231 has a notch that extends outwards, with the notch surface flush with the surface of the galvanometer 223. An air knife 232 is installed on the extended surface, and both ends of the air knife 232 are connected to a dust blowing pipe connector 233 to facilitate connection to external compressed air.

[0091] In some embodiments, the adsorption and fixing assembly 310 includes a mounting member 311, a suction cup 312, and a suction cup tube connector 313. The mounting member 311 is coupled to the first driving assembly 320 and is driven by the first driving assembly 320. The suction cup 312 and the suction cup tube connector 313 are both mounted on the mounting member 311, and the suction cup 312 and the suction cup tube connector 313 are in communication.

[0092] The suction cup 312 is configured to adsorb the marking area of ​​the glass battery cell to be marked and to pull the glass battery cell to be marked down to the top surface of the mounting member 311. The top surface of the mounting member 311 is configured as a Z-axis local shaping reference surface for the glass battery cell to be marked. Preferably, the suction cup 312 and the suction cup tube connector 313 are evenly distributed on the mounting member 311, so that the force is more even when adsorbing and fixing the glass battery cell to be marked. The first driving component 320 can be any device or component capable of driving the mounting member 311 to perform short-distance fine movement, such as an evenly distributed lead screw stepper motor or servo motor. The present invention does not impose specific limitations on this. One end of the first driving component 320 is fixed to the extension surface at another notch opened on the outer peripheral surface of the dust collection head 231, and the other end is connected to the mounting member 311 to drive the mounting member 311.

[0093] In some embodiments, the laser marking device further includes a control module (not shown), and the adsorption and fixing module 300 further includes a second displacement sensing component 330. The control module is connected to the second displacement sensing component 330 and the first driving component 320 respectively.

[0094] The second displacement sensing component 330 is configured to monitor in real time the distance between the light-emitting surface of the laser marking module 200 and the glass battery sheet to be marked that is adsorbed and fixed by the adsorption and fixing module 300, and to feed back the distance to the control module; the second displacement sensing component 330 is installed on the outer peripheral surface of the dust collection head 231.

[0095] The control module is configured to: based on the distance, control the first driving component 320 to drive the adsorption fixing component 310 to move the focal plane of the marking area of ​​the glass battery to be marked. Since the glass battery to be marked undergoes slight deformation when the suction cup 312 adsorbs it, the second displacement sensing component 330 monitors the change in distance from the focal plane in real time and feeds the signal back to the first driving component 320. The first driving component 320 then adjusts the focal plane of the marking area of ​​the product through the Z-axis micro-adjustment mounting component 311. This closed-loop control method enables fine adjustment and achieves secondary Z-axis precision positioning.

[0096] In some embodiments, the laser marking device further includes a cable chain assembly 400, which includes a cable chain mounting plate 410 and a cable chain 420. Both ends of the cable chain 420 are connected to the two cable chain mounting plates 410 respectively, for assembling the wiring in the mobile positioning module 100, the laser marking module 200, and the adsorption fixing module 300, such as laser power lines, galvanometer power lines, displacement sensor power lines, lead screw stepper motor power lines, air pipes, etc., which move up and down with the laser marking module 200. The cable chain mounting plate 410 is locked onto the mounting base 210 in the laser marking module 200 and can move with it; the cable chain mounting plate 410 is locked onto the base 110 and fixed in place.

[0097] Example 2: This example provides a laser marking method using the laser marking device provided in Example 1. Referring to Figure 5, the method includes:

[0098] S1. After the glass solar cell to be marked is placed in the preset position in the laser marking device, the adsorption and fixing component is activated to adsorb and fix the marking area of ​​the glass solar cell to be marked.

[0099] S2. Control the moving positioning module to drive the laser marking module to move to the first position for coarse positioning.

[0100] S3. Control the first driving component to drive the adsorption and fixing module to move to the second position for precise positioning.

[0101] In some embodiments, referring to FIG6, step S2 includes:

[0102] S21. Obtain the position data of the glass battery cell to be marked based on the first displacement sensing component in the mobile positioning module;

[0103] S22. Based on the location data, control the mobile positioning module to drive the laser marking module to rise and fall, so as to adjust the focal depth of the laser marking module in the vertical direction of the glass battery sheet to be marked;

[0104] Step S3 includes:

[0105] S31. The distance between the light-emitting surface of the laser marking module and the glass battery sheet to be marked, which is adsorbed and fixed by the adsorption and fixing component, is obtained based on the second displacement sensing component.

[0106] S32. Based on the distance control, the first driving component drives the adsorption fixing component to move the focal plane of the marking area of ​​the glass battery cell to be marked.

[0107] A two-stage positioning method with real-time closed-loop feedback replaces the single Z-axis lifting and lowering positioning. The first Z-axis positioning is a coarse positioning, where the laser marking module and the adsorption and fixing module are positioned together with large steps for rapid positioning. This is achieved by the moving positioning module driving the laser marking film and the adsorption and fixing module to rise and fall together, and by the first displacement sensing component providing real-time feedback to adjust the distance between the laser component and the product. After the first positioning is completed, the moving positioning module remains stationary. The second Z-axis positioning is a fine positioning, where the adsorption and fixing component in the adsorption and fixing module is finely adjusted with small steps. This is achieved by the first driving component driving the adsorption and fixing component to rise and fall separately, and by the second displacement sensing component providing real-time feedback to adjust the distance between the laser component and the product. Because the product will undergo slight deformation after being adsorbed by the suction cup, the second Z-axis fine positioning is essential.

[0108] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A laser marking device, characterized in that, The laser marking device includes: a mobile positioning module, a laser marking module, and an adsorption and fixing module; The laser marking module is slidably connected to the mobile positioning module and is driven to rise and fall by the mobile positioning module; The adsorption and fixing module includes an adsorption and fixing component and a first driving component. The first driving component is mounted on the laser marking module. The driving end of the first driving component is connected to the adsorption and fixing component to drive the adsorption and fixing component to rise and fall. The adsorption and fixing component adsorbs and fixes the marking area of ​​the glass solar cell to be marked. The glass solar cell to be marked, which is adsorbed and fixed by the adsorption and fixing component, extends in the horizontal direction. The laser marking module is configured to be connected to and driven by the mobile positioning module to move up and down to perform a primary positioning of the glass solar cell to be marked; the adsorption and fixing component is configured to be driven by the first driving component to move up and down to perform a secondary positioning of the adsorbed and fixed glass solar cell to be marked.

2. The laser marking device according to claim 1, characterized in that, The mobile positioning module includes a base, a moving shaft, and a second drive component; The movable shaft is vertically mounted on the base, and the laser marking module is slidably connected to the movable shaft; The second drive assembly is mounted on the end of the movable shaft and is configured to mate with the laser marking module to drive the laser marking module to slide and move up and down on the movable shaft.

3. The laser marking device according to claim 2, characterized in that, The mobile positioning module also includes a guide component; The guide assembly includes at least two slide rails fixed to the base, the at least two slide rails being parallel to the moving axis and symmetrically distributed on both sides of the moving axis; The laser marking module is slidably connected to each of the slide rails.

4. The laser marking device according to claim 2, characterized in that, The laser marking device further includes a control module, and the mobile positioning module further includes a first displacement sensing component. The control module is signal-connected to the first displacement sensing component and the second driving component, respectively. The first displacement sensing component is installed on the side of the moving shaft. The first displacement sensing component is configured to monitor in real time the position data of the glass battery sheet to be marked adsorbed on the adsorption fixing component fixedly connected to the laser marking module, and transmit the position data signal to the control module. The control module is configured to control the second driving component to drive the laser marking module to rise and fall based on the received position data, so as to adjust the focal depth of the laser marking module in the vertical direction of the glass battery to be marked.

5. The laser marking device according to claim 1, characterized in that, The laser marking module includes a mounting base and a laser assembly; The mounting base is slidably connected to the mobile positioning module, and the laser component is fixed on the mounting base; The adsorption and fixing module is connected to the end of the laser marking module, and the laser emitting end of the laser component faces the bottom surface of the glass battery sheet to be marked, which is adsorbed and fixed on the adsorption and fixing module.

6. The laser marking device according to claim 5, characterized in that, The laser assembly includes a laser, a collimating lens, and a galvanometer. The laser is fixed to the mounting base, and the laser is configured to provide a laser source; One end of the collimating lens is connected to the emitting end of the laser, and the collimating lens is configured to convert the laser beam emitted by the laser into a parallel beam; The other end of the collimating lens is connected to the galvanometer, which is configured to provide marking compatibility on the marking area for laser marking. The glass solar cell to be marked, which is adsorbed and fixed by the adsorption and fixing module, is located above the galvanometer.

7. The laser marking device according to claim 6, characterized in that, The laser marking module also includes a dust collection component, which is installed at the laser marking area of ​​the laser marking module; The dust collection component is configured to collect dust generated during the marking process.

8. The laser marking apparatus according to claim 7, characterized in that, The dust collection assembly includes a dust collection head and an air knife; The dust collection head is fixedly connected to the galvanometer, and the dust collection head is configured to collect the dust generated during the marking process; The air knife is fixedly connected to the dust collection head, and the air knife is configured to blow away the dust left on the surface of the galvanometer.

9. The laser marking apparatus according to claim 8, characterized in that, The dust collection head wraps around the galvanometer, and one end of the dust collection head is fixed to the end face of the galvanometer; The dust collection head has an opening on its circumferential surface that is flush with the outer circumferential surface of the galvanometer. The air knife is installed at the opening, and the air outlet of the air knife faces the galvanometer.

10. The laser marking device according to claim 1, characterized in that, The adsorption and fixing component includes a mounting component, a suction cup, and a suction cup tube connector. The mounting component is coupled with the first driving component and is driven by the first driving component. The suction cup and the suction cup tube connector are both mounted on the mounting component, and the suction cup and the suction cup tube connector are in communication. The suction cup is configured to adsorb the marking area of ​​the glass solar cell to be marked, and to pull the glass solar cell to be marked down to the top surface of the mounting component. The top surface of the mounting component is configured as a Z-axis local shaping reference surface for the glass solar cell to be marked.

11. The laser marking device according to claim 1, characterized in that, The laser marking device further includes a control module, and the adsorption and fixing module includes a second displacement sensing component. The control module is signal-connected to the second displacement sensing component and the first driving component respectively. The second displacement sensing component is configured to monitor in real time the distance between the light-emitting surface of the laser marking module and the glass battery sheet to be marked that is adsorbed and fixed by the adsorption and fixing component, and to feed back the distance to the control module; The control module is configured to: based on the distance, control the first driving component to drive the adsorption fixing component to move the focal plane of the marking area of ​​the glass battery cell to be marked.

12. A laser marking method, characterized in that, The method using the laser marking apparatus as described in any one of claims 1-10 includes: After the glass solar cell to be marked is placed in the preset position in the laser marking device, the adsorption and fixing component is activated to adsorb and fix the marking area of ​​the glass solar cell to be marked. The control module drives the laser marking module to move to the first position for coarse positioning. The first driving component is controlled to drive the adsorption and fixing module to move to the second position for precise positioning.

13. The laser marking method according to claim 12, characterized in that, The control and positioning module drives the laser marking module to move to the first position for coarse positioning, including: The position data of the glass battery cell to be marked is obtained based on the first displacement sensing component in the mobile positioning module; Based on the location data, the mobile positioning module is controlled to drive the laser marking module to rise and fall, so as to adjust the focal depth of the laser marking module in the vertical direction of the glass battery sheet to be marked; The step of controlling the first driving component to drive the adsorption and fixing module to move to the second position for precise positioning includes: The distance between the light-emitting surface of the laser marking module and the glass battery sheet to be marked, which is adsorbed and fixed by the adsorption and fixing component, is obtained based on the second displacement sensing component. Based on the distance control, the first driving component drives the adsorption fixing component to move the focal plane of the marking area of ​​the glass battery cell to be marked.

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