Beam splitting system with continuously adjustable sub-beam spacing

Abstract

The invention discloses a beam splitting system with continuously adjustable sub-beam spacing. The beam splitting system comprises a beam splitting device used for equally dividing a laser beam into a plurality of sub-beams; the distance adjusting module is used for independently receiving the sub-beams and comprises a focusing mirror, a first reflecting mirror and a mobile control device, the focusing mirror is used for receiving the sub-beams and focusing the sub-beams on the first reflecting mirror, the first reflecting mirror is used for reflecting the sub-beams so that all the sub-beams can be emitted in the same direction, and the mobile control device is used for controlling the sub-beams to be emitted in the same direction; the mobile control device is used for controlling the first reflector and the focus lens to move so as to adjust the distance between the sub-beams. Based on the beam splitting system, laser beam splitting and interval adjustment of the sub-beams can be realized, the production efficiency of solar cells is improved, and the system cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of optical splitting equipment, and in particular to a splitting system with continuously adjustable sub-beam spacing. Background Art

[0002] Laser scribing is an important step in the production process of solar cells. The laser is responsible for dividing a large solar panel into multiple independent sub-cells to optimize energy conversion efficiency and reduce thermal effects. In order to further improve the production efficiency of solar cells, the industry generally adopts a strategy: splitting a single laser source into multiple sub-lasers and controlling them to perform scribing operations simultaneously, thereby significantly speeding up the production process.

[0003] There are currently three main technologies used to achieve laser beam splitting, namely optical diffraction elements (also known as DOE), phase plates, and mechanical splitting.

[0004] Among them, DOE is famous for the simplicity of its optical path structure, which facilitates seamless integration with existing production equipment. However, once the laser is divided by DOE, each sub-laser can no longer be individually regulated, and the diffraction efficiency of DOE is relatively low. At the same time, due to its low diffraction efficiency, the consistency of each sub-laser is also poor, which affects the uniformity and quality of the solar panel division.

[0005] Phase plate spectrometry technology makes up for the shortcomings of DOE in some aspects. The phase plate can effectively guide laser energy, improve diffraction efficiency, and ensure the high consistency of each sub-laser. However, the divergence angle of the phase plate is relatively small, which limits the adjustment range of the spacing between sub-lasers. In addition, the production cost of the phase plate is high, which increases the investment cost of the overall equipment.

[0006] The advantage of mechanical spectrometry is that the optical path design is simple and the sub-beams are arranged in a row with large intervals. Its disadvantage is that the intervals between the sub-beams cannot be adjusted at will, and the space occupied by ordinary mechanical spectrometry devices increases as the number of sub-beams increases, which is not conducive to integration. Summary of the invention

[0007] The object of the present invention is to provide a splitting system with continuously adjustable sub-beam spacing, which can accurately split a laser beam and continuously adjust the spacing of sub-beams obtained by the splitting.

[0008] In order to achieve the above object, the present invention discloses a light splitting system with continuously adjustable sub-beam spacing, which comprises: A beam splitter for equally dividing a laser beam into a plurality of sub-beams; A spacing adjustment module is used for independently receiving each of the sub-beams, and the spacing adjustment module includes a focusing mirror, a first reflecting mirror and a movement control device. The focusing mirror is used to receive the sub-beams and focus the sub-beams on the first reflecting mirror, the first reflecting mirror is used to reflect the sub-beams so that all the sub-beams are emitted in the same direction, and the movement control device is used to control the movement of the first reflecting mirror and the focusing mirror to adjust the spacing of each of the sub-beams.

[0009] Optionally, the light splitting system further includes an electrically adjustable reflector, and the electrically adjustable reflector is used to receive the sub-beams reflected by the first reflector and adjust the focal position of each of the sub-beams.

[0010] Optionally, the spectroscopic system further includes a plurality of optical gates having the same number as the sub-beams, wherein the optical gates are arranged between the spectroscopic device and the electric adjustment module, and are used to adjust the power of each sub-beam and control the on / off of the propagation path of each sub-beam.

[0011] Furthermore, the light splitting system further includes a plurality of second reflectors, and the second reflectors are arranged between the light splitting device and the optical gate, or between two light splitting devices.

[0012] Furthermore, the light splitting system also includes a plurality of third reflectors, and the third reflectors are arranged between the optical gate and the spacing adjustment module.

[0013] Furthermore, the spectroscopic system also includes an optical path box, in which the spectroscopic device, the spacing adjustment module, the electrically adjustable reflector, the optical gate, the second reflector and the third reflector are all arranged. The optical path box is provided with a beam inlet and a sub-beam outlet. The single laser beam is injected from the beam inlet, and each sub-beam formed by equally dividing the laser beam is emitted from the sub-beam outlet.

[0014] Optionally, the light splitting device is a light splitting prism.

[0015] Optionally, the distance between the focusing mirror and the first reflecting mirror corresponding to the focusing mirror is fixed.

[0016] Compared with the prior art, the spectroscopic system with continuously adjustable sub-beam spacing provided by the above technical solution of the present invention firstly performs balanced beam splitting of the laser through the spectroscopic device to ensure the consistency of the sub-beams, which is crucial for ensuring the scribing accuracy and battery performance. Secondly, through the spacing adjustment module, the independent adjustment of each sub-beam is realized, thereby realizing the continuous adjustment of the sub-beam spacing, thereby adapting to the scribing requirements of solar cells and improving production efficiency. In addition, the spectroscopic system provided by the technical solution is based on basic optical components, has a simple structure, is easy to integrate and has low cost, is suitable for production cost requirements, and the modular design makes the system compact and occupies a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a light splitting system with continuously adjustable sub-beam spacing in an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the state of a sub-beam entering / emitting the light path box in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0020] This embodiment discloses a light splitting system with continuously adjustable sub-beam spacing, so as to improve the production efficiency of solar cells and reduce the cost of the light splitting system under the premise of achieving laser beam splitting and continuous adjustment of the sub-beam spacing. Figure 1 As shown, the optical splitting system of this embodiment includes an optical splitting device 1 and a spacing adjustment module 2 .

[0021] The spectrometer 1 is used to divide the laser beam into a plurality of sub-beams. In this embodiment, 8 sub-beams are taken as an example. The spacing adjustment module 2 is used to receive each sub-beam independently. The number of spacing adjustment modules 2 is equal to the number of sub-beams separated by the spectrometer 1, which is also 8. A single spacing adjustment module 2 includes a focusing mirror 21, a first reflector 22 and a moving control device 23. The focusing mirror 21 is used to receive a single sub-beam and focus the sub-beam on the corresponding first reflector 22. The first reflector 22 is used to reflect the sub-beam so that all sub-beams are emitted in the same direction. The moving control device 23 is used to control the movement of the first reflector 22 and the focusing mirror 21. The focusing mirror 21 and the first reflector 22 can move back and forth up and down in the ab direction together in the moving control device 23 to adjust the spacing of each sub-beam.

[0022] Compared with the prior art, the spectroscopic system with continuously adjustable sub-beam spacing provided by the embodiment of the present invention shows obvious improvements and innovations. First, the system uses a spectroscopic device 1 to accurately and evenly divide the incident laser beam into multiple sub-beams. This process ensures that each sub-beam is highly consistent in intensity, direction and spectral characteristics, which is crucial for achieving accurate scribing in the solar cell manufacturing process. Secondly, the spacing adjustment module 2 of the present invention gives the spectroscopic system the ability to independently and continuously adjust the spacing of each sub-beam, and the operator can flexibly adjust the relative position between the sub-beams according to the specific scribing requirements of the solar cell, thereby improving the adaptability of scribing. Based on this, the application scope of the spectroscopic system is broadened, so that it can meet the solar cell production lines of different specifications and different design requirements, and effectively improve the production efficiency. At the same time, from the perspective of technical implementation, the spectroscopic system provided by the present invention is constructed based on basic and mature optical elements, which not only ensures the stability and reliability of the system, but also simplifies its structural complexity, and the various structures are compactly combined to save space. Compared with similar systems that use complex mechanical structures or high-end technologies, the present invention achieves lower cost investment while maintaining high performance. At the same time, this simple structural design is also conducive to system integration and maintenance.

[0023] In summary, the spectroscopic system with continuously adjustable sub-beam spacing disclosed in the embodiment of the present invention not only ensures the scribing accuracy and battery performance through precise spectroscopic and flexible spacing adjustment mechanism, but also provides a new solution for the efficient and low-cost production of solar cells with its advantages of simple structure, low cost and small space occupation, and has important practical value.

[0024] See also Figure 1 As shown, in this embodiment, the light splitting system further includes an electrically adjustable reflector 3, which is used to receive the sub-beam reflected by the first reflector 22 and adjust the focal position of the sub-beam. The electrically adjustable reflector 3 can change the focal position of the sub-beam focused on the solar cell, and automatically change the focal point according to the scribing requirements of different types of solar cells (such as uneven / curved glass substrates) to ensure the scribing quality.

[0025] Optionally, the optical splitting system of this embodiment further includes a plurality of optical gates 4 having the same number as the number of sub-beams, and the optical gates 4 are arranged between the optical splitting device 1 and the electric adjustment module, and the optical gates 4 are used to adjust the power of each sub-beam and control the on-off of the propagation path of each sub-beam. In this embodiment, the optical gates 4 are preferably electrically driven, and the optical gates 4 can automatically control the on-off of the propagation path of each sub-beam according to the scribing requirements of the solar cell, and each sub-beam can achieve independent adjustment of the power through the optical gates 4.

[0026] Optionally, the spectroscopic system of this embodiment further includes a plurality of second reflectors 5 , which are disposed between the spectroscopic device 1 and the optical gate 4 or between two spectroscopic devices 1 , and the second reflectors 5 cooperate with each other to reflect each sub-beam into the corresponding optical gate 4 .

[0027] Optionally, the spectroscopic system of this embodiment further includes a plurality of third reflectors 6 , which are disposed between the optical gate 4 and the spacing adjustment module 2 , and the third reflectors 6 cooperate with each other to reflect the sub-beams emitted by each optical gate 4 into the focusing mirror 21 .

[0028] The use of the second reflector 5 and the third reflector 6 can shorten the propagation path of the sub-beam, so that the sub-beam can propagate to the corresponding position along the shortest propagation path, thereby reducing energy dissipation during the propagation process and further reducing the occupied area of ​​the spectroscopic system.

[0029] Optionally, see Figure 1 and Figure 2 As shown, the optical splitting system of this embodiment also includes an optical path box 7. The above-mentioned optical splitting device 1, spacing adjustment module 2, electrically adjustable reflector 3, optical shutter 4, second reflector 5 and third reflector 6 are all arranged in the optical path box 7. The optical path box 7 is provided with a beam entrance port 71 and a sub-beam exit port 72. A single laser beam enters from the beam entrance port 71, and each sub-beam formed by the laser beam is equally divided and emitted from the sub-beam exit port 72. In this embodiment, the optical path box 7 is the encapsulation of the entire optical splitting system. The encapsulation ensures the stability and reliability of the beam splitting, ensures that the optical splitting system can be used for a long time and guarantees the quality of the sub-beams of the split beams. Preferably, the total weight of the optical path box 7 is less than 20Kg, and it can be set on a high-speed (speed ≥ 2m / s) mechanical motion structure to reciprocate to cut solar cells.

[0030] Optionally, the light splitting device 1 is a light splitting prism, which can achieve equal distribution of the laser light beam power.

[0031] Optionally, the distance between the focusing mirror 21 and the first reflecting mirror 22 corresponding to the focusing mirror 21 is fixed.

[0032] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A light splitting system with continuously adjustable sub-beam spacing, characterized in that: include: A beam splitter for equally dividing a laser beam into a plurality of sub-beams; A spacing adjustment module is used for independently receiving each of the sub-beams, and the spacing adjustment module includes a focusing mirror, a first reflecting mirror and a movement control device. The focusing mirror is used to receive the sub-beams and focus the sub-beams on the first reflecting mirror, the first reflecting mirror is used to reflect the sub-beams so that all the sub-beams are emitted in the same direction, and the movement control device is used to control the movement of the first reflecting mirror and the focusing mirror to adjust the spacing of each of the sub-beams.

2. The light splitting system with continuously adjustable sub-beam spacing according to claim 1, characterized in that: The light splitting system further comprises an electrically adjustable reflector, and the electrically adjustable reflector is used to receive the sub-beams reflected by the first reflector and adjust the focal position of each of the sub-beams.

3. The light splitting system with continuously adjustable sub-beam spacing according to claim 1, characterized in that: The optical splitting system also includes a plurality of optical gates having the same number as the sub-beams, and the optical gates are arranged between the optical splitting device and the electric adjustment module, and are used to adjust the power of each sub-beam and control the on-off of the propagation path of each sub-beam.

4. The light splitting system with continuously adjustable sub-beam spacing according to claim 3, characterized in that: The optical splitting system further comprises a plurality of second reflectors, wherein the second reflectors are arranged between the optical splitting device and the optical gate, or between two optical splitting devices.

5. The light splitting system with continuously adjustable sub-beam spacing according to claim 3, characterized in that: The light splitting system further includes a plurality of third reflectors, and the third reflectors are arranged between the optical shutter and the spacing adjustment module.

6. The light splitting system with continuously adjustable sub-beam spacing according to claims 1 to 5, characterized in that: The spectroscopic system also includes an optical path box, in which the spectroscopic device, the spacing adjustment module, the electrically adjustable reflector, the optical shutter, the second reflector and the third reflector are all arranged. A beam inlet and a sub-beam outlet are provided on the optical path box. A single laser beam is injected from the beam inlet, and each sub-beam formed by equally dividing the laser beam is emitted from the sub-beam outlet.

7. The light splitting system with continuously adjustable sub-beam spacing according to claim 1, characterized in that: The light splitting device is a light splitting prism.

8. The light splitting system with continuously adjustable sub-beam spacing according to claim 1, characterized in that: The distance between the focusing mirror and the first reflecting mirror corresponding to the focusing mirror is fixed.

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