A method for altering the laser propagation path using mirror technology

Abstract

This invention relates to a method for altering the laser propagation path using mirror technology. The method includes: S1, mounting a gold-plated mirror on a precision positioning and angle adjustment device, the precision positioning and angle adjustment device including a fine-tuning mechanism; S2, determining and setting the laser's operating parameters based on the material and size of the solar cell; S3, automatically adjusting the number and position of the gold-plated mirrors according to an intelligent control system; S4, activating the laser and the intelligent control system, allowing the laser to irradiate the solar cell area below the probe through the gold-plated mirrors, performing laser-assisted sintering on the solar cell. This invention can improve the reflection efficiency of the mirrors, achieve precise control of the mirror's installation position and angle, and ensure that the laser accurately irradiates the solar cell area below the probe. Simultaneously, it can automatically adjust the number and position of the mirrors, reducing the number of mirrors used and the complexity of the equipment, thereby reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of mirror technology, and more specifically, to a method for altering the propagation path of a laser using mirror technology. Background Technology

[0002] Laser-assisted sintering (LAS) is a precision machining technology widely used in fields such as electronics manufacturing and biomedical engineering. Its basic principle is to use a high-energy-density laser beam to heat the material, causing it to melt and solidify rapidly, thereby achieving the precise shaping of microstructures. During LAS, the laser propagation path has a significant impact on the processing results.

[0003] To address this issue, existing technologies primarily utilize mirrors to alter the laser's propagation path, ensuring it reaches the area requiring processing. This method effectively expands the laser's irradiation range and improves processing efficiency.

[0004] Existing reflector technology still faces several challenges in practical applications. First, the reflectivity of a reflector is influenced by various factors, such as its material and surface roughness, which affect the laser energy distribution and consequently the processing results. Second, the installation position and angle of the reflector require precise control; otherwise, the laser propagation path may deviate, preventing the laser from illuminating the area of ​​the solar cells below the probe and impacting processing accuracy. Furthermore, the number of reflectors used increases the complexity and cost of the equipment, hindering large-scale production applications. Summary of the Invention

[0005] The purpose of this invention is to provide a method for changing the laser propagation path using mirror technology. This method can change the laser path by using mirrors, effectively increasing the laser's irradiable area and preventing the laser from failing to irradiate the battery cell area below the probe.

[0006] To achieve the above objectives, the present invention provides a method for changing the laser propagation path using mirror technology, the method comprising: S1. Install the gold-plated reflector on the precision positioning and angle adjustment device; the precision positioning and angle adjustment device includes a fine-tuning mechanism; S2. Determine the operating parameters of the laser based on the material and size of the solar cells; S3. The number and position of the gold-plated reflectors are automatically adjusted according to the intelligent control system. S4. Turn on the laser and intelligent control system so that the laser shines through the gold-plated reflector onto the battery cell area below the probe to perform laser-assisted sintering on the battery cell.

[0007] Optionally, the precision positioning and angle adjustment device has an error accuracy of ±0.01mm.

[0008] Optionally, the diameter of the gold-plated reflector is 2-20 cm; the gold-plated reflector includes a base layer, a transition layer, a reflective layer and a protective layer stacked sequentially; wherein, the thickness of the base layer is 1-18 mm; the thickness of the transition layer is 5-20 nm; the thickness of the reflective layer is 30-250 nm; and the thickness of the protective layer is 20-100 nm.

[0009] Optionally, the surface roughness of the gold-plated reflector is less than 5 nm; The substrate layer is made of any one of quartz glass, borosilicate glass, microcrystalline glass, and monocrystalline silicon. The material of the transition layer is selected from any one of chromium, titanium, nickel and molybdenum; The reflective layer is made of gold; The protective layer is made of SiO2.

[0010] Optionally, the gold-plated reflector has a maximum reflectivity of 98%.

[0011] Optionally, the number of gold-plated reflectors is two, including a first gold-plated reflector and a second gold-plated reflector; the first gold-plated reflector and the second gold-plated reflector are respectively located on both sides of the laser.

[0012] Optionally, the angle between the reflective surface of the first gold-plated reflector and the second gold-plated reflector and the battery cell can each be any value within the range of 10°-70°.

[0013] Optionally, the intelligent control system automatically adjusts the number and position of the gold-plated reflectors by controlling the precision positioning and angle adjustment device.

[0014] Optionally, the operating parameters of the laser include: laser power of 5-100W, scanning speed of 300-2500mm / s, and scanning spacing of 0.01-2mm.

[0015] Optionally, the battery cell is made of silicon; the shape of the battery cell is any one of square, rectangle, polygon and rhombus; the side length of the battery cell is 50-400mm and the thickness is 80-300mm.

[0016] Through the above technical solution, this invention employs a gold-plated reflector, which improves the reflector's reflection efficiency and ensures uniform laser energy distribution. The gold-plated reflector is mounted on a precision positioning and angle adjustment device, and a fine-tuning mechanism enables precise control of the reflector's installation position and angle. This prevents deviations in the laser propagation path, which could affect processing accuracy, and ensures that the laser accurately illuminates the battery cell area below the probe. Simultaneously, an intelligent control system automatically adjusts the number and position of the reflectors, reducing the number of reflectors used and the complexity of the equipment while maintaining processing quality, thereby lowering production costs and meeting the needs of large-scale production.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the laser of the present invention irradiating the battery cell through a gold-plated reflector.

[0019] Explanation of reference numerals in the attached figures 20 First gold-plated reflector; 21 Second gold-plated reflector; 50 Battery cell area; α1 The angle between the reflecting surface of the first gold-plated mirror and the solar cell; α2 The angle between the reflecting surface of the second gold-plated mirror and the battery cell. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] This invention provides a method for changing the propagation path of a laser using mirror technology, the method comprising: S1. Install the gold-plated reflector on the precision positioning and angle adjustment device; the precision positioning and angle adjustment device includes a fine-tuning mechanism; S2. Determine the operating parameters of the laser based on the material and size of the solar cells; S3. The number and position of the gold-plated reflectors are automatically adjusted according to the intelligent control system. S4. Turn on the laser and intelligent control system so that the laser shines through the gold-plated reflector onto the battery cell area below the probe to perform laser-assisted sintering on the battery cell.

[0022] This invention employs gold-plated reflectors, which improves reflectivity and ensures uniform laser energy distribution. The gold-plated reflectors are mounted on a precision positioning and angle adjustment device. A fine-tuning mechanism allows for precise control of the reflector's position and angle, preventing deviations in the laser propagation path and ensuring accurate laser illumination of the cell area below the probe. Simultaneously, an intelligent control system automatically adjusts the number and position of the reflectors, reducing the number of reflectors and equipment complexity while maintaining processing quality, thereby lowering production costs and meeting the demands of large-scale production.

[0023] According to the present invention, optionally, the error accuracy of the precision positioning and angle adjustment device is ±0.01mm, preferably ±0.005mm, and more preferably ±0.001mm. Herein, error accuracy refers to the precision between the actual laser spot position and the target laser spot position in the solar cell area.

[0024] According to the present invention, optionally, the diameter of the gold-plated reflector is 2-20 cm; preferably 8-15 cm, more preferably 10 cm. The gold-plated reflector includes a base layer, a transition layer, a reflective layer, and a protective layer stacked sequentially; wherein, the thickness of the base layer is 1-18 mm, preferably 1-15 mm; the base layer can provide mechanical support and optical flatness for the gold-plated reflector. The thickness of the transition layer is 5-20 nm; the transition layer can enhance the adhesion between the reflective layer and the base layer, effectively preventing delamination. The thickness of the reflective layer is 30-250 nm; the reflective layer is the surface gold film of the gold-plated reflector, which can efficiently reflect infrared light (>700 nm). The thickness of the protective layer is 20-100 nm; the protective layer can isolate oxygen, prevent water vapor corrosion, improve the wear resistance of the gold-plated reflector, effectively prevent oxidation or mechanical damage to the metal layer, and further improve environmental stability. Further, the total thickness of the gold-plated reflector can be 2-20 mm. Through the above embodiments, the reflection efficiency and stability of the reflector can be further improved.

[0025] According to the present invention, optionally, the gold-plated reflector has a maximum reflectivity of 98%. Using a high-reflectivity gold-plated reflector improves the reflectivity of the reflector, ensures uniform laser energy distribution, and thus improves the processing effect.

[0026] According to the present invention, optionally, the surface roughness of the gold-plated reflector is less than 5 nm. Through the above embodiments, uniform energy distribution of the laser can be ensured.

[0027] According to the present invention, the material of the substrate layer is selected from any one of quartz glass, borosilicate glass, microcrystalline glass and monocrystalline silicon; preferably, quartz glass is used. The material of the transition layer is selected from any one of chromium, titanium, nickel and molybdenum; The reflective layer is made of gold; The protective layer is made of SiO2.

[0028] According to the present invention, such as Figure 1 As shown, optionally, the number of gold-plated reflectors is two, including a first gold-plated reflector and a second gold-plated reflector; the first gold-plated reflector and the second gold-plated reflector are respectively located on both sides of the laser. Wherein, α1 is the angle between the reflecting surface of the first gold-plated reflector and the solar cell; α2 is the angle between the reflecting surface of the second gold-plated reflector and the solar cell. α1 and α2 are each independently acute angles. Specifically, the angle between the reflecting surfaces of the first and second gold-plated reflectors and the solar cell is independently any value within the range of 10°-70°, for example, 10°, 20°, 30°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 60°, 70°, or any value between any two of these. Through the above implementation, the first and second gold-plated reflectors can change the laser path, effectively increasing the irradiable area of ​​the laser. This avoids the solar cell area below the probe not being irradiated due to probe obstruction, thereby improving the processing accuracy and solar cell efficiency of laser-assisted sintering.

[0029] According to the present invention, optionally, the intelligent control system automatically adjusts the number and position of the gold-plated reflectors by controlling the precision positioning and angle adjustment device, so as to reduce the number of reflectors used and the complexity of the equipment while ensuring the processing effect, thereby reducing production costs and adapting to the needs of large-scale production. The system can automatically adjust the working state of the reflectors through real-time monitoring and feedback to achieve a highly efficient and precise laser-assisted sintering process. Specifically, the intelligent control system can perform preliminary detection of the position and angle of the reflectors through the sensing layer; for example, by capturing the actual spot position of the laser on the solar cell using a CCD vision sensor and detecting the energy density of the area below the probe using a laser energy detector. If the actual spot position deviates from the target position by more than 0.01 mm, or the energy density is greater than 5%, the decision layer of the intelligent control system performs optimization to obtain an optimized adjustment scheme for the position, angle, and number of reflectors; the precision positioning and angle adjustment device of the execution layer of the intelligent control system automatically adjusts the number and position of the gold-plated reflectors according to the optimized scheme. Further, depending on the shape of the solar cell, if there are sharp corner areas, the number and / or position of the reflectors may be adjusted to cover the sharp corner areas or blind spots.

[0030] According to the present invention, optionally, the operating parameters of the laser include: laser power of 5-100W, preferably 30-80W; scanning speed of 300-2500mm / s, preferably 800-1500mm / s; and scanning spacing of 0.01-2mm, preferably 0.05-0.5mm. Through the above embodiments, the laser energy distribution is uniform, ensuring that the laser energy can stably and reliably irradiate the battery cell area below the probe, which is beneficial to improving the processing effect.

[0031] According to the present invention, more preferably, the operating parameters of the laser include: laser power of 40-60W, scanning speed of 900-1200mm / s, and scanning spacing of 0.08-0.3mm.

[0032] According to the present invention, more preferably, the operating parameters of the laser include: laser power of 50W, scanning speed of 1000mm / s, and scanning spacing of 0.1mm.

[0033] According to the present invention, optionally, the material of the solar cell is silicon, that is, the solar cell is a silicon wafer; the shape of the solar cell is any one of square, rectangle, polygon and rhombus; the side length of the solar cell is 50-400mm and the thickness is 80-300mm.

[0034] The present invention will be further illustrated by the following examples, but the present invention is not limited thereto.

[0035] The gold-plated reflector used in the following embodiments has a surface roughness of 3 nm. The gold-plated reflector includes a 2 mm thick quartz glass base layer, a 10 nm thick chromium transition layer, and a 50 nm thick SiO2 protective layer, which are stacked sequentially.

[0036] Example 1 A method for altering the propagation path of a laser using mirror technology, the method comprising: S1. Install the gold-plated reflector on the precision positioning and angle adjustment device; the precision positioning and angle adjustment device includes a fine-tuning mechanism; wherein, the diameter of the gold-plated reflector is 10cm, the thickness of the gold film on the surface of the gold-plated reflector is 80nm (i.e., the reflective layer), and the maximum reflectivity is 98%; S2. Determine the laser's operating parameters based on the material and size of the solar cell; the solar cell has a side length of 200mm and a thickness of 180mm; the laser power is 50W, the scanning speed is 1000mm / s, and the scanning interval is 0.1mm. S3. The number and position of the gold-plated reflectors are automatically adjusted according to the intelligent control system; wherein, there are two gold-plated reflectors, including a first gold-plated reflector and a second gold-plated reflector, which are placed on both sides of the laser; the angle between the reflective surface of the first gold-plated reflector and the battery cell is 40° respectively. S4. Turn on the laser and intelligent control system so that the laser shines through the gold-plated reflector onto the battery cell area below the probe to perform laser-assisted sintering on the battery cell. S5. After the sintering process is completed, turn off the laser and intelligent control system, remove the sintered solar cells, check the quality of the solar cells, and ensure that they meet the design requirements.

[0037] Example 2 A method for altering the propagation path of a laser using mirror technology, the method comprising: S1. Install the gold-plated reflector on the precision positioning and angle adjustment device; the precision positioning and angle adjustment device includes a fine-tuning mechanism; wherein, the diameter of the gold-plated reflector is 10cm, the thickness of the gold film on the surface of the gold-plated reflector is 100nm (i.e., the reflective layer), and the maximum reflectivity is 98%; S2. Determine the operating parameters of the laser based on the material and size of the solar cell; wherein, the side length of the solar cell is 180mm, the thickness is 180mm, the laser power is 60W, the scanning speed is 1200mm / s, and the scanning interval is 0.3mm. S3. The number and position of the gold-plated reflectors are automatically adjusted according to the intelligent control system; wherein, there are two gold-plated reflectors, including a first gold-plated reflector and a second gold-plated reflector, which are placed on both sides of the laser; the angle between the reflective surface of the first gold-plated reflector and the battery cell is 50° respectively. S4. Turn on the laser and intelligent control system so that the laser shines through the gold-plated reflector onto the battery cell area below the probe to perform laser-assisted sintering on the battery cell. S5. After the sintering process is completed, turn off the laser and intelligent control system, remove the sintered solar cells, check the quality of the solar cells, and ensure that they meet the design requirements.

[0038] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for altering the propagation path of a laser using mirror technology, characterized in that, The method includes: S1. Install the gold-plated reflector on the precision positioning and angle adjustment device; the precision positioning and angle adjustment device includes a fine-tuning mechanism; S2. Determine the operating parameters of the laser based on the material and size of the solar cells; S3. The number and position of the gold-plated reflectors are automatically adjusted according to the intelligent control system. S4. Turn on the laser and intelligent control system so that the laser shines through the gold-plated reflector onto the battery cell area below the probe to perform laser-assisted sintering on the battery cell.

2. The method according to claim 1, wherein, The precision positioning and angle adjustment device has an error accuracy of ±0.01mm.

3. The method according to claim 1, wherein, The diameter of the gold-plated reflector is 2-20cm; The gold-plated reflector comprises a base layer, a transition layer, a reflective layer, and a protective layer stacked sequentially. The thickness of the base layer is 1-18 mm; the thickness of the transition layer is 5-20 nm; the thickness of the reflective layer is 30-250 nm; and the thickness of the protective layer is 20-100 nm.

4. The method according to claim 3, wherein, The surface roughness of the gold-plated reflector is less than 5 nm; The substrate layer is made of any one of quartz glass, borosilicate glass, microcrystalline glass, and monocrystalline silicon. The material of the transition layer is selected from any one of chromium, titanium, nickel and molybdenum; The reflective layer is made of gold; The protective layer is made of SiO2.

5. The method according to claim 4, wherein, The gold-plated reflector has a maximum reflectivity of 98%.

6. The method according to claim 1, wherein, The number of gold-plated reflectors is two, including a first gold-plated reflector and a second gold-plated reflector; The first gold-plated reflector and the second gold-plated reflector are located on both sides of the laser.

7. The method according to claim 6, wherein, The angle between the reflective surface of the first gold-plated reflector and the battery cell is an arbitrary value within the range of 10°-70°.

8. The method according to claim 1, wherein, The intelligent control system automatically adjusts the number and position of the gold-plated reflectors by controlling the precision positioning and angle adjustment device.

9. The method according to claim 1, wherein, The operating parameters of the laser include: laser power of 5-100W, scanning speed of 300-2500mm / s, and scanning spacing of 0.01-2mm.

10. The method according to claim 1, wherein, The battery cell is made of silicon; the shape of the battery cell is any one of square, rectangle, polygon, and rhombus. The side length of the battery cell is 50-400mm and the thickness is 80-300mm.

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