Downward-emitting laser optical path system and solar cell scribing machine

Abstract

This invention relates to the field of solar cell scribing technology, and more particularly to a bottom-emission laser optical path system and a solar cell scribing machine, aiming to alleviate the technical problems of low processing efficiency in existing single-path systems and high cost in multi-path systems. The bottom-emission laser optical path system includes a beam splitting module, an integral reflector, and a focusing lens. The beam splitting module is used to split a single laser beam into multiple parallel beams. The integral reflector is disposed on the output path of the beam splitting module and configured to reflect the multiple parallel beams in a direction perpendicular to the plane of the parallel beams during scribing. The focusing lens is disposed on the reflection path of the integral reflector and is used to output the beam reflected from the integral reflector. The solar cell scribing machine includes the bottom-emission laser optical path system. Using this bottom-emission laser optical path system, the splitting of a single laser beam is achieved, significantly improving processing efficiency while saving equipment space and reducing laser costs.

Description

Technical Field

[0001] This invention relates to the field of solar cell marking technology, and in particular to a bottom-emitting laser optical path system and a solar cell marking machine. Background Technology

[0002] To control and improve the output voltage, laser scribing is generally used to divide the sub-cells on different functional layers of solar cells, connecting multiple cells in series to form a module.

[0003] Laser scribing processes involve various parameter specifications, placing high demands on the efficiency, precision, and flexibility of laser processing equipment and its core optical path system. Currently, commonly used laser processing equipment includes single-path laser equipment and multi-path laser equipment. The former uses a single laser with a single optical path, making it difficult to meet the complex and numerous scribing processes, resulting in low processing efficiency; the latter uses multiple lasers to form a multi-path optical system, but at a higher cost. Summary of the Invention

[0004] The purpose of this invention is to provide a bottom-emitting laser optical path system and a solar cell scribing machine to alleviate the technical problems of low processing efficiency of existing single-optical-path systems and high cost of multi-optical-path systems.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the bottom-emitting laser optical path system provided by the present invention includes: a beam splitting module, an integral reflector, and a focusing lens;

[0007] The beam splitting module is used to split a single laser beam into multiple parallel beams.

[0008] The integral reflector is disposed on the light output path of the beam splitter module and configured to reflect multiple parallel beams in a direction perpendicular to the plane containing the parallel beams when the beams are scribing.

[0009] The focusing lens is positioned on the reflection path of the integral reflecting mirror and is used to output the light beam reflected from the integral reflecting mirror.

[0010] Furthermore, the beam splitting module includes a first polarizing beam splitter and a first reflecting mirror;

[0011] Multiple first polarization beam splitters are arranged in a straight line in sequence;

[0012] Multiple first reflectors are arranged one-to-one on the beam splitting path of the first polarizing beam splitter to reflect the beams split from the first polarizing beam splitter to the overall reflector.

[0013] Furthermore, the down-emitting laser optical path system also includes a second polarization beam splitter and a second reflecting mirror;

[0014] The second polarization beam splitter is used to split a single incident laser beam into two orthogonal beams;

[0015] The beam splitting module is provided in two sets. One set is set on one beam splitting path of the second polarization beam splitter, and the second reflector is set on the other beam splitting path of the second polarization beam splitter. It is configured to reflect the beam split from the second polarization beam splitter to the other set of beam splitting modules when the beam is scribing.

[0016] Furthermore, the lower-emitting laser optical path system also includes a protective mirror;

[0017] The protective lens is positioned on the light exit path of the focusing lens.

[0018] Furthermore, the lower-emitting laser optical path system also includes a sealed box;

[0019] The beam splitter, the integral reflector, and the focusing lens are all housed within the sealed box;

[0020] The sealed box includes a cover plate with a light exit hole for passing a light beam emitted from the focusing lens.

[0021] Furthermore, the sealed box also includes a base plate;

[0022] The beam splitting module is disposed on the base plate. The first reflector of the beam splitting module is distributed in a stepped manner and can move linearly on the base plate along the beam splitting path of the first polarizing beam splitter.

[0023] Furthermore, the base plate is provided with a sliding groove;

[0024] The first reflector is fixed to the reflector frame, and the reflector frame is slidably engaged with the base plate via the sliding groove;

[0025] Furthermore, the length of the groove on the side closer to the integral reflector is greater than the length of the groove on the side farther away from the integral reflector.

[0026] Furthermore, a fixing plate is provided on the base plate;

[0027] The focusing lens is slidably connected to the fixing plate;

[0028] The fixed plate is threaded with an adjustment knob, which can drive the focusing lens to slide along the reflection path of the overall mirror when rotating.

[0029] Furthermore, the down-emitting laser optical path system also includes a carrier plate and a linear drive assembly;

[0030] The linear drive assembly is disposed on the carrier plate and is connected to the sealing box for driving the sealing box to move in a direction parallel to the plane of the parallel beam.

[0031] Secondly, the solar cell marking machine provided by the present invention includes the aforementioned bottom-emitting laser optical path system.

[0032] In summary, the technical effects achieved by the bottom-emitting laser optical path system provided by this invention are as follows:

[0033] In this invention, the down-emitting laser optical path system includes a beam splitting module, an integral reflector, and a focusing lens; the beam splitting module is used to split a single laser beam into multiple parallel beams; the integral reflector is disposed on the output path of the beam splitting module and configured to reflect the multiple parallel beams in a direction perpendicular to the plane of the parallel beams under scribing conditions; the focusing lens is disposed on the reflection path of the integral reflector and is used to output the beam reflected from the integral reflector.

[0034] When a single laser beam is incident on this down-emission laser optical path system, the beam splitting module divides it into multiple parallel beams. These parallel beams are then reflected by the overall reflecting mirror in a direction perpendicular to their own plane to the focusing lens, completing the light output. It can be seen that this down-emission laser optical path system achieves the splitting of a single laser beam, that is, dividing the beam emitted by a single laser into multiple parallel beams, which then exit from the focusing plate. This allows the overall spacing between the multiple laser beams to be controlled within a very small range, meeting the requirements of fine scribing processes. Furthermore, it significantly improves processing efficiency while saving equipment space and reducing laser costs.

[0035] The beneficial effects of the solar cell marking machine provided by this invention are as follows:

[0036] The solar cell marking machine provided by the present invention includes a bottom-emitting laser optical path system. Therefore, the technical advantages and effects achieved by the solar cell marking machine also include the technical advantages and effects achieved by the aforementioned bottom-emitting laser optical path system, which will not be repeated here. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1This is an assembly diagram of the bottom-emitting laser optical path system provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the internal structure of the bottom-emitting laser optical path system provided in an embodiment of the present invention;

[0040] Figure 3 for Figure 2 Top view;

[0041] Figure 4 A top view of the base plate of the bottom-emitting laser optical path system provided in an embodiment of the present invention;

[0042] Figure 5 This is a partial cross-sectional view of the interior of the bottom-emitting laser optical path system provided in an embodiment of the present invention.

[0043] Icons: 100 - Overall reflecting mirror; 200 - Focusing mirror; 300 - First polarizing beam splitter; 400 - First reflecting mirror; 500 - Second polarizing beam splitter; 600 - Second reflecting mirror; 700 - Protective mirror;

[0044] 800-Sealed box; 810-Cover plate; 820-Base plate; 830-Walling; 821-Slide groove;

[0045] 900 - Reflector mount; 1000 - Mounting plate; 1100 - Adjustment knob; 1200 - Carrier plate; 1300 - Linear drive assembly; 1400 - Adjustable knob. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0048] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] Laser scribing processes involve various parameter specifications, placing high demands on the efficiency, precision, and flexibility of laser processing equipment and its core optical path system. Currently, commonly used laser processing equipment includes single-path laser equipment and multi-path laser equipment. The former uses a single laser with a single optical path, making it difficult to meet the complex and numerous scribing processes, resulting in low processing efficiency; the latter uses multiple lasers to form a multi-path optical system, but at a higher cost.

[0050] In view of this, the present invention provides a bottom-emitting laser optical path system, with reference to... Figures 1 to 5 The laser optical path system includes a beam splitting module, an integral reflector 100, and a focusing lens 200. The beam splitting module is used to split a single laser beam into multiple parallel beams. The integral reflector 100 is disposed on the output path of the beam splitting module and configured to reflect the multiple parallel beams in a direction perpendicular to the plane of the parallel beams under the scribing condition. The focusing lens 200 is disposed on the reflection path of the integral reflector 100 and is used to output the beam reflected from the integral reflector 100.

[0051] When a single laser beam is incident on this down-emission laser optical path system, the beam splitting module divides it into multiple parallel beams. These multiple parallel beams are reflected by the overall reflecting mirror 100 in a direction perpendicular to its own plane to the focusing mirror 200, thus completing the light output. It can be seen that this down-emission laser optical path system achieves the splitting of a single laser beam, that is, dividing the beam emitted by a single laser into multiple parallel beams, which are then emitted from the focusing plate. This allows the overall spacing between the multiple laser beams to be controlled within a very small range, meeting the requirements of fine scribing processes. Furthermore, it significantly improves processing efficiency while saving equipment space and reducing laser costs.

[0052] The following combination Figures 1 to 5 The following is a detailed description of the down-emitting laser optical path system provided in this embodiment:

[0053] Further reference Figures 2 to 5 The beam splitting module includes a first polarizing beam splitter 300 and a first reflecting mirror 400; multiple first polarizing beam splitters 300 are arranged in a straight line; multiple first reflecting mirrors 400 are arranged one-to-one on the beam splitting path of the first polarizing beam splitter 300 to reflect the beam split from the first polarizing beam splitter 300 to the overall reflecting mirror 100.

[0054] Specifically, with Figure 3For example, the beam splitting module has two sets, located on the upper and lower sides of the overall reflector 100; multiple first polarization beam splitters 300 are arranged sequentially, with each first reflector 400 corresponding to one of the first polarization beam splitters 300 in a stepped arrangement. When a single laser beam is incident on the first polarization beam splitter 300, it is split into orthogonally distributed beams. Of these orthogonally distributed beams, one beam is incident on the first reflector 400, and the other is incident on the adjacent first polarization beam splitter 300, thus forming multiple parallel beams. These multiple parallel beams are reflected by the overall reflector 100 to the focusing lens 200, completing the light output. (Continue to refer to...) Figure 3 Each beam splitter module is equipped with six first polarization beam splitters 300, and correspondingly, six first reflectors 400 are also provided. In this way, the upper beam splitter module can generate 6 laser beams, and the lower beam splitter module can also generate 6 laser beams. The 12 laser beams are reflected horizontally onto the overall reflector 100 and then pass through the focusing lens 200 to finally form 12 downward-emitting laser beams.

[0055] Further reference Figures 2 to 5 The down-emitting laser optical path system also includes a second polarization beam splitter 500 and a second reflector 600; the second polarization beam splitter 500 is used to split a single incident laser beam into two orthogonal beams; the beam splitting module is provided in two sets, one set is set on one of the beam splitting paths of the second polarization beam splitter 500, and the second reflector 600 is set on the other beam splitting path of the second polarization beam splitter 500, and is configured to reflect the beam split from the second polarization beam splitter 500 to the other beam splitting module in the line-splitting condition.

[0056] by Figure 3 For example, the initial laser beam, after being reflected by a mirror, enters the sealed box 800. After passing through the second polarizing beam splitter 500, it is split into two beams. One beam enters several first polarizing beam splitters 300 located coaxially, where it is split into corresponding beams. Each beam is then reflected by a first mirror 400 and enters the overall mirror 100, before exiting through the focusing mirror 200 and passing through the protective mirror 700, completing the light output. The other beam, after being reflected by a second mirror 600, passes through the corresponding group of first polarizing beam splitters 300, first mirror 400, overall mirror 100, focusing mirror 200, and protective mirror 700 in the same manner, completing the light output. This ultimately forms two rows of equally spaced multi-beam lasers exiting from the focusing mirror 200, ensuring that the overall spacing between the multiple laser beams is controlled within a very small range, meeting the requirements of fine scribing processes. It should be noted that the polarizing beam splitter uses a polarizing beam splitting prism.

[0057] Furthermore, the sealed box 800 includes a cover plate 810, a bottom plate 820, and a surrounding plate 830, which together form a box-like structure. The cover plate 810 has a light-emitting hole for the light beam emitted through the self-focusing lens 200. A protective lens 700 is disposed at the light-emitting hole to protect the focusing lens 200.

[0058] For further reference, Figure 3 and Figure 4 The base plate 820 is provided with a sliding groove 821; the first reflector 400 is fixed to the reflector frame 900, and the reflector frame 900 slides with the base plate 820 through the sliding groove 821.

[0059] For details, please refer to [link / reference]. Figure 3 and Figure 4 Multiple grooves 821 are arranged in a stepped manner, and each groove 821 extends in the left-right direction. A mirror frame 900 is correspondingly positioned in each groove 821. An adjustable knob 1400 is provided on each mirror frame 900. Pushing or pulling the adjustable knob 1400 moves the mirror frame 900 left or right, thereby moving the first mirror 400 left or right, enabling control of the distance between the emitted light beams and improving process flexibility. In this embodiment, the length of each groove 821 is different; the groove closer to the overall mirror 100 is longer than the groove further away from the overall mirror 100, thus increasing the adjustable spacing between each laser beam. Furthermore, the movable first mirror 400 can compensate for linearity errors in the scribing process.

[0060] Further reference Figures 2 to 5 A fixing plate 1000 is provided on the base plate 820; the focusing lens 200 is slidably connected to the fixing plate 1000; an adjusting knob 1100 is threaded on the fixing plate 1000, and the adjusting knob 1100 can drive the focusing lens 200 to slide along the reflection path of the overall reflecting mirror 100 when rotating.

[0061] Specifically, with Figure 2 For example, a fixed post is provided on the fixed plate 1000, and the focusing lens 200 is sleeved on the fixed post, which can slide along the axial direction of the fixed post to achieve lifting and lowering. When the adjusting knob 1100 is rotated clockwise or counterclockwise, it can be turned upwards, driving the focusing lens 200 to rise; when the adjusting knob 1100 is rotated counterclockwise or clockwise, it can be turned downwards, causing the focusing lens 200 to fall. With this design, the height of the focusing lens 200 can be adjusted to achieve laser focus following (overall following), meeting the requirements of fine scribing processes.

[0062] For further information, please refer to the following: Figures 2 to 5The down-emitting laser optical path system also includes a carrier plate 1200 and a linear drive assembly 1300; the linear drive assembly 1300 is disposed on the carrier plate 1200 and is connected to the sealing box 800 for driving the sealing box 800 to move in a direction parallel to the plane where the parallel beam is located.

[0063] refer to Figure 2 The linear drive assembly 1300 includes a linear driver and a guide rail. The guide rail is fixed to the carrier plate 1200, and the sealed box 800 is slidably engaged with the guide rail. The linear driver is drively connected to the sealed box 800. When the linear driver is activated, it can drive the sealed box 800 to move forward or backward, thereby driving the beam splitter module, the integral reflector 100, and the focusing lens 200. In this design, the beam splitter module, the integral reflector 100, and the focusing lens 200 are enclosed within the sealed box 800, reducing errors caused by the movement of multiple optical paths and improving the accuracy and stability during long-term operation.

[0064] This embodiment also provides a solar cell marking machine, including a bottom-emitting laser optical path system. Therefore, the technical advantages and effects achieved by this solar cell marking machine also include the technical advantages and effects achieved by the aforementioned bottom-emitting laser optical path system, which will not be repeated here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bottom-emitting laser optical path system, characterized in that, include: The beam splitter module, the integral reflector (100), and the focusing lens (200); The beam splitting module is used to split a single laser beam into multiple parallel beams. The integral reflector (100) is disposed on the light output path of the beam splitter and configured to reflect multiple parallel beams in a direction perpendicular to the plane of the parallel beams under the scribing condition. The focusing lens (200) is disposed on the reflection path of the integral reflecting mirror (100) and is used to output the light beam reflected from the integral reflecting mirror (100); The beam splitting module includes a first polarization beam splitter (300) and a first reflector (400); Multiple first polarization beam splitters (300) are arranged in a straight line in sequence; Multiple first reflectors (400) are arranged one-to-one on the beam splitting path of the first polarizing beam splitter (300) to reflect the beam split from the first polarizing beam splitter (300) to the integral reflector (100); The down-emitting laser optical path system also includes a second polarization beam splitter (500) and a second reflecting mirror (600); The second polarization beam splitter (500) is used to split a single incident laser beam into two orthogonal beams; The beam splitting module is provided in two sets, one set is set on one beam splitting path of the second polarization beam splitter (500), and the second reflector (600) is set on the other beam splitting path of the second polarization beam splitter (500), and is configured to reflect the beam split from the second polarization beam splitter (500) to the other set of beam splitting modules in the line drawing operation. One set of the beam splitting modules is disposed on one side of the integral reflector (100), and the other set is disposed on the other side of the integral reflector (100). The multi-path parallel beams obtained from the two sets of beam splitting modules are reflected by the integral reflector (100) and then emitted out in a staggered vertical direction to reduce the overall spacing of the emitted beams.

2. The down-emitting laser optical path system according to claim 1, characterized in that, The lower-emitting laser optical path system also includes a protective mirror (700); The protective lens (700) is positioned on the light exit path of the focusing lens (200).

3. The down-emitting laser optical path system according to claim 1 or 2, characterized in that, The down-emitting laser optical path system also includes a sealed box (800); The beam splitter, the integral reflector (100), and the focusing lens (200) are all housed within the sealed box (800); The sealed box (800) includes a cover plate (810) having a light exit hole for passing a light beam emitted from the focusing lens (200).

4. The down-emitting laser optical path system according to claim 3, characterized in that, The sealed box (800) also includes a base plate (820); The beam splitting module is mounted on the base plate (820). The first reflector (400) of the beam splitting module is arranged in a stepped manner and can move linearly on the base plate (820) along the beam splitting path of the first polarizing beam splitter (300).

5. The down-emitting laser optical path system according to claim 4, characterized in that, The base plate (820) is provided with a sliding groove (821); The first reflector (400) is fixed to the reflector frame (900), and the reflector frame (900) is slidably engaged with the base plate (820) through the slide groove (821); Furthermore, the length of the groove (821) on the side closer to the integral reflector (100) is greater than the length of the groove (821) on the side farther away from the integral reflector (100).

6. The down-emitting laser optical path system according to claim 4, characterized in that, A fixing plate (1000) is provided on the base plate (820); The focusing lens (200) is slidably connected to the fixing plate (1000); The fixing plate (1000) is threaded with an adjustment knob (1100), which can drive the focusing lens (200) to slide along the reflection path of the integral reflecting mirror (100) when rotating.

7. The down-emitting laser optical path system according to claim 3, characterized in that, The down-emitting laser optical path system also includes a carrier plate (1200) and a linear drive assembly (1300); The linear drive assembly (1300) is disposed on the carrier plate (1200) and is connected to the sealing box (800) for driving the sealing box (800) to move in a direction parallel to the plane of the parallel beam.

8. A solar cell marking machine, characterized in that, Including the bottom-emitting laser optical path system as described in any one of claims 1 to 7.

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