Laser welding glass edge sealing device and method

Abstract

The invention discloses a laser welding glass edge sealing device and method, and relates to the field of solar cell packaging, the laser welding glass edge sealing device comprises an information input device, a main control device and a laser welding device, laser parameter data are set through the information input device and output to the main control device, the main control device processes the laser parameter data and generates a corresponding laser control signal, and the laser control signal is sent to the laser welding device. Controlling the laser welding equipment to adjust a laser welding path, laser emission power and laser emission frequency based on the laser control signal, and controlling the laser welding equipment to emit adjusted femtosecond laser through a femtosecond laser emitting end, and according to the welding path control signal, femtosecond laser is controlled to weld target welding spots on the edges of the chip glass and the backboard glass. According to the glass edge sealing device and method, laser welding is used for replacing a traditional edge sealing method, welding and edge sealing are carried out on glass through precisely adjusted femtosecond laser, and the defects that a solar cell is short in service life and insufficient in moisture-proof capacity due to the traditional edge sealing method are overcome.

Description

Technical Field

[0001] The invention relates to the field of solar cell packaging, and in particular to a laser welding glass edge sealing device and method. Background Art

[0002] In the process of packaging solar cells, the chip glass and back panel glass of the battery chip need to be sealed to protect the battery chip. In this process, the traditional butyl rubber edge sealing method is currently mostly used for glass edge sealing. This is because butyl rubber has good elasticity and adhesion, and is low in cost, which can reduce costs.

[0003] However, although the butyl rubber edge sealing method has many advantages, it has also exposed some problems in practical applications. The most prominent problem is that butyl rubber has the limitations of aging and performance degradation, which makes the glass edge sealing of solar cells loose during long-term use, causing solar cells to malfunction and affecting their service life; and as the use time increases, the moisture-proof ability of butyl rubber may decrease, causing the solar cells to become damp.

[0004] Therefore, there is a need to provide a glass edge sealing device and method that can effectively extend the service life of solar cells and provide better moisture-proof capabilities. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a laser welding glass edge sealing device and method, which solves the problems of short service life and insufficient moisture resistance of solar cells caused by butyl rubber edge sealing method in the current solar cell packaging field.

[0006] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, a laser welding glass edge sealing device comprises an information input device, a main control device and a laser welding device, wherein the information input device, the main control device and the laser welding device are electrically connected in sequence; An information input device, used to obtain laser parameter data and send the laser parameter data to a main control device; A main control device, used to receive the laser parameter data, and generate a laser control signal according to the laser parameter data and send it to the laser welding device, wherein the laser control signal includes a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal; A laser welding device, configured to adjust laser parameters according to a welding parameter adjustment signal in the laser control signal after receiving the laser control signal; The laser welding equipment is also used to emit a femtosecond laser through the femtosecond laser output end after the laser parameters are adjusted, and control the femtosecond laser to weld the target welding points on the edge of the chip glass and the back panel glass according to the welding path control signal to form a weld.

[0007] Based on the above-mentioned laser welding glass edge sealing device, in one feasible design, the information input device includes a parameter setting panel; A parameter setting panel, used to obtain the laser parameter data in response to human-computer interaction and send the laser parameter data to the main control device, wherein the laser parameter data includes welding path data, laser power data and laser frequency data; The main control device is used to receive the laser parameter data, generate a welding path control signal according to the welding path data, and generate a laser power signal and a laser frequency signal according to the laser power data and the laser frequency data, so as to obtain a welding parameter adjustment signal using the laser power signal and the laser frequency signal.

[0008] Based on the above-mentioned laser welding glass edge sealing device, in a feasible design, it also includes a position adjustment device; The parameter setting panel is also used to obtain the laser device position data when responding to human-computer interaction, and send the laser device position data to the main control device; The main control device is used to generate a position adjustment signal after receiving the laser device position data, and send the position adjustment signal to the position adjustment device, so that the position adjustment device drives the laser welding device to adjust to the position corresponding to the laser device position data after receiving the position adjustment signal.

[0009] Based on the above-mentioned laser welding glass edge sealing device, in an achievable design, it also includes a distance measuring device, wherein the distance measuring device includes a distance sensor and an information processing module; A main control device, whose control end is electrically connected to the controlled end of the distance sensor, and is used to control the distance sensor to work to obtain the first distance information between the distance sensor and the back plate glass after receiving the position data of the laser device; a distance sensor, whose output end is electrically connected to the input end of the information processing module, and is used to transmit the obtained first distance information to the information processing module; An information processing module, configured to calculate second distance information between the femtosecond laser emission end and the backplane glass based on the first distance information; an information processing module, whose output end is electrically connected to the distance information input end of the main control device, and is used to feed back the second distance information to the main control device; The main control device is also used to determine whether the laser welding device is at a preset position based on the received second distance information, and when the determination result is no, send a position adjustment signal to the position adjustment device again.

[0010] Based on the above-mentioned laser welding glass edge sealing device, in a feasible design, the distance sensor adopts a laser distance measuring sensor.

[0011] Based on the above-mentioned laser welding glass edge sealing device, in an achievable design, it also includes a workpiece stabilizing device, wherein the workpiece stabilizing device includes a glass placing platform and a glass fixing fixture; A glass placement platform is arranged opposite to the femtosecond laser emission end and is used to place the chip glass and back plate glass to be processed; Glass fixing fixtures are arranged on both sides of the glass placement platform and are used to clamp and fix the chip glass and the back panel glass.

[0012] Based on the above-mentioned laser welding glass edge sealing device, in an achievable design, it also includes an image capturing device; An image capture device, used to obtain image information of the weld at the edge of the chip glass and the back plate glass after welding is completed, and output the obtained image information to the main control device; The main control device is used to perform image recognition after receiving the image information, and to perform welding quality verification according to the recognition result, and to send a laser control signal to the laser welding device again when the welding quality verification fails.

[0013] Based on the above laser welding glass edge sealing device, in a feasible design, it also includes a host computer; The host computer, whose input end is electrically connected to the output end of the information input device, is used to receive laser parameter data and display it visually.

[0014] Based on the above-mentioned laser welding glass edge sealing device, in a feasible design, the laser welding equipment includes a femtosecond laser source, a reflector, a galvanometer and a focusing mirror; In a second aspect, a laser welding glass edge sealing method is implemented based on the main control device and the laser welding device in any one of the above-mentioned laser welding glass edge sealing devices, wherein the method comprises the following steps: The main control device obtains laser parameter data from the information input device, generates a laser control signal according to the laser parameter data, and sends the generated laser control signal to the laser welding device, wherein the laser control signal includes a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal, the welding path control signal is used to control the laser welding device to set the laser emission focus point, the laser power signal is used to control the laser welding device to adjust the laser emission power, and the laser frequency adjustment signal is used to control the laser welding device to adjust the laser emission frequency; The laser welding equipment sets a corresponding welding path for the femtosecond laser according to the received laser control signal, so that the femtosecond laser can perform welding according to the welding path set by the laser parameter data; and adjusts the power and frequency of the femtosecond laser so that the emitted femtosecond laser reaches the power and frequency corresponding to the laser parameter data; After completing the laser parameter adjustment and welding path setting of the femtosecond laser, the laser welding equipment emits the adjusted femtosecond laser from the femtosecond laser output end, and welds the target welding points at the edges of the chip glass and the back panel glass according to the set welding path.

[0015] Based on the above-mentioned laser welding glass edge sealing method, in a feasible design, after the main control device obtains the laser parameter data from the information input device, the following steps are also included: The main control device obtains the laser device position data from the information input device, generates a position adjustment signal according to the laser device position data, and sends the generated position adjustment signal to the position adjustment device, wherein the position adjustment signal is used to control the position adjustment device to drive the laser welding device to adjust to the position corresponding to the laser device position data; The main control device obtains the laser device position data from the information input device, and controls the distance measuring device to work based on the laser device position data to obtain first distance information and second distance information, wherein the first distance information is the distance information between the distance sensor and the back plate glass, and the second distance information is the distance information between the femtosecond laser emission end and the back plate glass; The main control device obtains the second distance information from the ranging device, and determines whether the laser welding device is at the position corresponding to the laser device position data based on the second distance information and the laser device position data. If the result is no, a position adjustment signal is sent to the position adjustment device again and the above steps are repeated until the judgment result is yes.

[0016] Based on the above-mentioned laser welding glass edge sealing method, in a feasible design, after the welding is completed, the following steps are also included: The main control device generates a quality verification signal and sends the generated quality verification signal to the image capture device, wherein the quality verification signal is used to control the image capture device to obtain image information of the weld at the edge of the chip glass and the back plate glass; The main control device obtains image information from the image capture device and performs image recognition, performs welding quality verification according to the recognition result, and sends a laser control signal to the laser welding device again when the welding quality verification fails; Repeat the above steps until the welding quality inspection passes.

[0017] Beneficial effects: (1) The glass edge sealing device disclosed in the present invention includes an information input device, a main control device and a laser welding device; when the device is working, the laser parameter data is set through the information input device and output to the main control device, the main control device processes the signal and generates a corresponding laser control signal, and controls the laser welding device to adjust the laser welding path, laser emission power and laser emission frequency based on the laser control signal, and controls the laser welding device to emit the adjusted femtosecond laser through the femtosecond laser emission end, and controls the femtosecond laser to weld the target welding point at the edge of the chip glass and the back plate glass according to the welding path control signal to form a weld. The device uses the precisely adjusted femtosecond laser to weld and seal the glass, and the welding part will not loosen or have moisture problems, which can effectively extend the service life of the solar cell and provide better moisture resistance.

[0018] (2) The glass edge sealing method disclosed in the present invention is implemented based on the main control device and laser welding device in the above-mentioned glass edge sealing device, specifically: the main control device obtains laser parameter data from the information input device, generates a laser control signal according to the laser parameter data, and sends the generated laser control signal to the laser welding device; the laser welding device sets the corresponding welding path for the femtosecond laser according to the received laser control signal, so that the femtosecond laser can weld according to the welding path set by the laser parameter data; and adjusts the power and frequency of the femtosecond laser so that the emitted femtosecond laser reaches the power and frequency corresponding to the laser parameter data; then the laser welding device emits the adjusted femtosecond laser from the femtosecond laser emission end, and welds the target welding point at the edge of the chip glass and the back plate glass according to the set welding path. This glass edge sealing method directly replaces the traditional edge sealing method with laser welding, and welds the glass with the precisely adjusted femtosecond laser to overcome the disadvantages of the traditional edge sealing method that the solar cell has a short service life and insufficient moisture resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a functional structure block diagram of the glass edge sealing device in Example 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the laser welding equipment in Example 1 of the present invention; Figure 3 This is a schematic diagram of the laser emission state of the laser welding equipment in Example 1 of the present invention; Figure 4 Schematic diagram of the process of the glass edge sealing method in Example 2 of the present invention.

[0020] In the figure, 1. Glass placement platform; 2. Glass fixing fixture; 3. Distance measuring device; 4. Image capturing device; 5. Vibrating mirror; 6. Focusing mirror; 7. Femtosecond laser output end; 8. Femtosecond laser source; 9. Reflector; 10. Chip glass; 11. Back panel glass. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0022] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present invention.

[0023] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0024] Embodiment 1: like Figure 1As shown, a laser welding glass edge sealing device provided in this embodiment adopts a laser welding edge sealing device to replace the traditional butyl rubber edge sealing device to achieve the edge sealing of the solar chip glass 10 and the back plate glass 11. This laser welding edge sealing device realizes information reception and control through the main control device, and finally completes the edge sealing of the solar chip glass 10 and the back plate glass 11 through the laser welding equipment. Using this device for glass edge sealing can avoid aging of the edge sealing of solar cells after long-term use, resulting in reduced moisture-proof ability and shorter service life.

[0025] A laser welding glass edge sealing device provided in this embodiment includes an information input device, a main control device and a laser welding device. The information input device is responsible for receiving the external signal input of the device, and is used to input relevant laser parameter data into the device according to different needs and different scenarios. The main control device is responsible for receiving the laser parameter data sent by the information input device and converting it into a corresponding laser control signal and outputting it to the laser welding device, and is used to output different laser control signals according to different laser parameter data to achieve precise control of the laser welding device. As the executor of the welding work, the laser welding device is responsible for completing the corresponding laser parameter adjustment according to the control signal, and controls the femtosecond laser to form a weld at the target welding point on the edge of the chip glass 10 and the back plate glass 11 according to the welding path control signal after the laser adjustment process, and completes the welding work, so that the edges of the chip glass 10 and the back plate glass 11 of the solar cell are covered by the weld to form a whole.

[0026] In the glass edge sealing device provided in this embodiment, the information input device includes a parameter setting panel, which is used to obtain laser parameter data in response to human-computer interaction and send the laser parameter data to the main control device, wherein the laser parameter data includes but is not limited to welding path data, laser power data and laser frequency data (the staff inputs the corresponding laser parameter data to obtain the corresponding laser control signal according to actual needs), wherein the welding path data can be set according to the length and shape of the glass to be welded, etc., and the purpose of inputting this parameter is to ensure that the focus of the laser emitted by the laser welding equipment falls on the part to be welded during the welding process, so as to avoid The welding position is wrong; the laser power data is used to select different powers according to different welding filler materials and glass materials to ensure the quality and reliability of welding; the laser frequency data is because the laser frequency will affect the spot overlap rate of the actual processing. If the spot overlap rate is too small, the welding gap will be too large, resulting in discontinuous welds. When the spot overlap rate is too large, it will cause excessive energy in the local area to cause bubbles, leading to welding problems. Therefore, it is necessary to select the appropriate laser frequency data according to the required spot overlap rate; after completing the setting of these laser parameter data, the information input device can generate the corresponding preset signal according to the input laser parameter data and send it to the main control device for processing. The laser power data and laser frequency data here can be preferably set as follows: the laser power data is set between 1W and 2.5W, and the laser frequency data is set between 1MHz and 10MHz. This range is to facilitate the realization of micro spot welding of glass materials.

[0027] The main control device is used to receive laser parameter data, and generate a laser control signal based on the laser parameter data and send it to the laser welding equipment, wherein the laser control signal corresponds to the laser parameter data, including but not limited to a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal.

[0028] The laser welding equipment is used to set the laser welding path and adjust the laser emission power and laser emission frequency according to the received laser control signal. After the laser parameters are adjusted, the femtosecond laser is emitted through the femtosecond laser output end 7, and the welding path corresponding to the welding path control signal is used to weld the target welding points on the edges of the chip glass 10 and the back panel glass 11 to form a weld.

[0029] It should be noted that the laser welding equipment mentioned in this embodiment is the executor of laser welding, and the laser it emits is a femtosecond laser, which is a laser that operates in the form of pulses, and its duration is very short, only a few femtoseconds, and it has the advantages of short duration, high instantaneous power and strong focusing ability. The pulse time of the femtosecond laser is extremely short, usually only a few femtoseconds, which makes the travel distance of the laser controllable at the micron level; and its instantaneous power can reach trillions of watts, which is much stronger than the Coulomb field of the internal interaction of atoms, so the femtosecond laser pulse can easily break the electrons out of the bondage of atoms and form plasma; and the femtosecond laser can be focused into a space area with a very small diameter, so that the intensity of the electromagnetic field is several times higher than the force of the nucleus on the electrons around it. These characteristics make femtosecond laser processing have the advantages of high energy density, small heat-affected zone, no spatter and no slag, and play an important role in the fields of microstructure processing, optoelectronic information industry, etc. Therefore, it is very suitable to apply femtosecond laser processing technology to this embodiment for laser welding, and its specific technical means do not need to be described in detail.

[0030] A laser welding glass edge sealing device provided in this embodiment, as a preferred implementation mode, also includes a position adjustment device. The laser parameter data obtained by the parameter setting panel also includes laser equipment position data. The main control device generates a position adjustment signal according to the laser equipment position data and outputs it to the position adjustment device. After receiving the position adjustment signal sent by the main control device, the position adjustment device drives the laser welding device to adjust to the position corresponding to the laser equipment position data. This makes the welding position more accurate and the welding path more precise.

[0031] The laser welding glass edge sealing device provided in this embodiment, as a preferred implementation, further includes a distance measuring device 3, the distance measuring device 3 includes a distance sensor and an information processing module, wherein the control end of the main control device is electrically connected to the controlled end of the distance sensor, and is used to control the distance sensor to work after receiving the laser device position data to obtain the first distance information between the distance sensor and the back plate glass 11; the output end of the distance sensor is electrically connected to the input end of the information processing module, and is used to transmit the obtained first distance information to the information processing module; the information processing module is used to calculate the second distance information between the femtosecond laser emission end 7 and the back plate glass 11 based on the first distance information; the output end of the information processing module is electrically connected to the distance information input end of the main control device, and is used to feed back the second distance information to the main control device; the main control device is also used to determine whether the laser welding device is at the position corresponding to the laser device position data according to the received second distance information, and when the judgment result is no, send a position adjustment signal to the position adjustment device again. The distance sensor here can preferably be a laser distance measuring sensor. The ranging device 3 can assist the position adjustment device and help with position detection. If there is a problem with the position adjustment, detection and adjustment will be carried out continuously without starting the welding work. The staff will realize that the laser welding equipment may have a fault and cannot reach the position corresponding to the laser equipment position data.

[0032] The laser welding glass edge sealing device provided in this embodiment, as a preferred implementation, also includes a workpiece stabilizing device, which includes a glass placement platform 1 and a glass fixing fixture 2. The glass placement platform 1 is used to place the chip glass 10 and the back glass 11 to be processed. The glass fixing fixture 2 is arranged on both sides of the glass placement platform 1, and is used to clamp and fix the chip glass 10 and the back glass 11 to be welded; wherein the glass placement platform 1 is arranged at a position directly opposite to the femtosecond laser emission end 7 of the laser welding device. The workpiece stabilizing device ensures that the chip glass 10 and the back glass 11 to be processed will not shake during welding, thereby avoiding welding quality problems.

[0033] The laser welding glass edge sealing device provided in this embodiment, as a preferred implementation, further includes an image capture device 4, which is used to obtain image information of the weld at the edge of the chip glass 10 and the back glass 11 after welding is completed, and output the obtained image information to the main control device; wherein the main control device performs image recognition after receiving the image information, and performs welding quality verification according to the recognition result, and sends a laser control signal to the laser welding device again when the welding quality verification fails. The image capture module can perform quality verification after welding is completed to ensure that the weld between the chip glass 10 and the back glass 11 that have been welded meets the required standards and will not affect the quality of the solar cell. In this embodiment, the image capture device 4 can preferably use a CCD.

[0034] The laser welding glass edge sealing device provided in this embodiment, as a preferred embodiment, further includes a host computer, whose input end is electrically connected to the output end of the information input device, for receiving laser parameter data and visually displaying it. The laser welding device includes a femtosecond laser source 8, a reflector 9, a galvanometer 5 and a focusing mirror 6; the femtosecond laser source 8 is used to generate the femtosecond laser beam required for welding and emit it to the reflector 9, the reflector 9 is used to receive the incident femtosecond laser beam, adjust the emission direction of the received femtosecond laser beam, and emit the emitted femtosecond laser to the galvanometer 5, the galvanometer 5 is used to adjust the emission direction of the received femtosecond laser beam again, and emit the adjusted femtosecond laser beam to the focusing mirror 6, the focusing mirror 6 is used to focus or diverge the received femtosecond laser beam, so that the emitted femtosecond laser beam reaches the target welding point according to the preset welding path for welding and edge sealing, forming a weld; wherein the femtosecond laser emission end 7 is arranged on the focusing mirror 6. By making multiple adjustments to the emitted femtosecond laser, it can be ensured that its emission direction is correct and the laser focus falls accurately on the required target welding point, which can ensure the accuracy of the welding work.

[0035] Embodiment 2: like Figure 2-4 As shown, a laser welding glass edge sealing method provided in this embodiment is implemented based on the main control device and laser welding device in any one of the laser welding glass edge sealing devices in Example 1. The glass edge sealing method provided in this embodiment may include but is not limited to the following steps: S100. The main control device obtains laser parameter data from the information input device, generates a laser control signal according to the laser parameter data, and sends the generated laser control signal to the laser welding equipment, wherein the laser control signal includes a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal, the welding path control signal is used to control the laser welding equipment to set the laser emission focus point, the laser power signal is used to control the laser welding equipment to adjust the laser emission power, and the laser frequency adjustment signal is used to control the laser welding equipment to adjust the laser emission frequency.

[0036] S200. The laser welding equipment sets the corresponding welding path for the femtosecond laser according to the received laser control signal, so that the femtosecond laser can perform welding according to the welding path set by the laser parameter data; and adjusts the power and frequency of the femtosecond laser so that the emitted femtosecond laser reaches the power and frequency corresponding to the laser parameter data.

[0037] S300. After completing the laser parameter adjustment and welding path setting of the femtosecond laser, the laser welding equipment emits the adjusted femtosecond laser from the femtosecond laser output end, and welds the target welding points at the edges of the chip glass and the back panel glass according to the set welding path.

[0038] In a feasible design, before welding, the glass edge sealing method provided in this embodiment may further include the following steps: Place the chip glass on the glass placement platform and use a cleaning machine to clean the surface of the chip glass so that there is no oil, dust or other impurities on the edge and contact surface of the chip glass; Lay the EVA film on the chip glass to make the EVA film fit closely to the upper surface of the chip glass and ensure that the thickness is uniform without bubbles and wrinkles; Use a high-precision screen printer with an accuracy of 2um to lay a layer of silicon powder on the edge of the chip glass. The thickness of the silicon powder layer is controlled between 50um and 100um, and the width is controlled to be 1mm to 2mm wider than the edge of the chip glass, so that good insulation and sealing effects can be formed during welding; The back glass is precisely placed on top of the chip glass and the back glass and chip glass are fixed with a glass fixture to keep them in exactly the same position during the welding process.

[0039] In a feasible design, after the main control device obtains the laser parameter data from the information input device, the following steps are also included: The main control device obtains the laser device position data from the information input device, generates a position adjustment signal according to the laser device position data, and sends the generated position adjustment signal to the position adjustment device, wherein the position adjustment signal is used to control the position adjustment device to drive the laser welding device to adjust to the position corresponding to the laser device position data; The main control device obtains the laser device position data from the information input device, and controls the distance measuring device to work based on the laser device position data to obtain first distance information and second distance information, wherein the first distance information is the distance information between the distance sensor and the back plate glass, and the second distance information is the distance information between the femtosecond laser emission end and the back plate glass; The main control device obtains the second distance information from the ranging device, and determines whether the laser welding device is at the position corresponding to the laser device position data based on the second distance information and the laser device position data. If the result is no, a position adjustment signal is sent to the position adjustment device again and the above steps are repeated until the judgment result is yes.

[0040] Based on the above-mentioned laser welding glass edge sealing method, in a feasible design, after the welding is completed, the following steps are also included: The main control device generates a quality verification signal and sends the generated quality verification signal to the image capture device, wherein the quality verification signal is used to control the image capture device to obtain image information of the weld at the edge of the chip glass and the back plate glass; The main control device obtains image information from the image capture device and performs image recognition, performs welding quality verification according to the recognition result, and sends a laser control signal to the laser welding device again when the welding quality verification fails; Repeat the above steps until the welding quality inspection passes.

[0041] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser welding glass edge sealing device, characterized in that: It includes an information input device, a main control device and a laser welding device, wherein the information input device, the main control device and the laser welding device are electrically connected in sequence; An information input device, used to obtain laser parameter data and send the laser parameter data to a main control device; A main control device, used to receive the laser parameter data, and generate a laser control signal according to the laser parameter data and send it to the laser welding device, wherein the laser control signal includes a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal; A laser welding device, configured to adjust laser parameters according to a welding parameter adjustment signal in the laser control signal after receiving the laser control signal; The laser welding equipment is also used to emit a femtosecond laser through the femtosecond laser output end after the laser parameters are adjusted, and control the femtosecond laser to weld the target welding points on the edge of the chip glass and the back panel glass according to the welding path control signal to form a weld.

2. The laser welding glass edge sealing device according to claim 1, characterized in that: The information input device includes a parameter setting panel; A parameter setting panel, used to obtain the laser parameter data in response to human-computer interaction and send the laser parameter data to the main control device, wherein the laser parameter data includes welding path data, laser power data and laser frequency data; The main control device is used to receive the laser parameter data, generate a welding path control signal according to the welding path data, and generate a laser power signal and a laser frequency signal according to the laser power data and the laser frequency data, so as to obtain a welding parameter adjustment signal using the laser power signal and the laser frequency signal.

3. The laser welding glass edge sealing device according to claim 2, characterized in that: Also included is a position adjustment device; The parameter setting panel is also used to obtain the laser device position data when responding to human-computer interaction, and send the laser device position data to the main control device; The main control device is used to generate a position adjustment signal after receiving the laser device position data, and send the position adjustment signal to the position adjustment device, so that the position adjustment device drives the laser welding device to adjust to the position corresponding to the laser device position data after receiving the position adjustment signal.

4. The laser welding glass edge sealing device according to claim 3, characterized in that: Also included is a distance measuring device, wherein the distance measuring device includes a distance sensor and an information processing module; A main control device, whose control end is electrically connected to the controlled end of the distance sensor, and is used to control the distance sensor to work to obtain the first distance information between the distance sensor and the back plate glass after receiving the position data of the laser device; a distance sensor, whose output end is electrically connected to the input end of the information processing module, and is used to transmit the obtained first distance information to the information processing module; An information processing module, configured to calculate second distance information between the femtosecond laser emission end and the backplane glass based on the first distance information; an information processing module, whose output end is electrically connected to the distance information input end of the main control device, and is used to feed back the second distance information to the main control device; The main control device is also used to determine whether the laser welding device is at the position corresponding to the laser device position data based on the received second distance information, and when the judgment result is no, send a position adjustment signal to the position adjustment device again.

5. The laser welding glass edge sealing device according to claim 4, characterized in that: The distance sensor adopts a laser distance measuring sensor.

6. The laser welding glass edge sealing device according to claim 1, characterized in that: Also included is a workpiece stabilization device, wherein the workpiece stabilization device includes a glass placement platform and a glass fixing fixture; A glass placement platform is arranged opposite to the femtosecond laser emission end and is used to place the chip glass and back plate glass to be processed; Glass fixing fixtures are arranged on both sides of the glass placement platform and are used to clamp and fix the chip glass and the back panel glass.

7. The laser welding glass edge sealing device according to claim 1, characterized in that: Also included is an image capture device; An image capture device, used to obtain image information of the weld at the edge of the chip glass and the back plate glass after welding is completed, and output the obtained image information to the main control device; The main control device is used to perform image recognition after receiving the image information, and to perform welding quality verification according to the recognition result, and to send a laser control signal to the laser welding device again when the welding quality verification fails.

8. The laser welding glass edge sealing device according to claim 1, characterized in that: It also includes the host computer; The host computer, whose input end is electrically connected to the output end of the information input device, is used to receive laser parameter data and display it visually.

9. The laser welding glass edge sealing device according to claim 1, characterized in that: The laser welding equipment comprises a femtosecond laser source, a reflector, a galvanometer and a focusing mirror; A femtosecond laser source is used to emit a femtosecond laser beam to a reflector, wherein the femtosecond laser beam is emitted by the reflector, incident on a galvanometer, and after the emission direction is adjusted by the galvanometer, it is emitted to a target welding point at the edge of the chip glass and the back panel glass through a focusing mirror.

10. A laser welding glass edge sealing method, implemented based on the main control device and laser welding equipment in the laser welding glass edge sealing device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: The main control device obtains laser parameter data from the information input device, generates a laser control signal according to the laser parameter data, and sends the generated laser control signal to the laser welding device, wherein the laser control signal includes a welding path control signal and a welding parameter adjustment signal, and the welding parameter adjustment signal includes a laser power signal and a laser frequency signal, the welding path control signal is used to control the laser welding device to set the laser emission focus point, the laser power signal is used to control the laser welding device to adjust the laser emission power, and the laser frequency adjustment signal is used to control the laser welding device to adjust the laser emission frequency; The laser welding equipment sets a corresponding welding path for the femtosecond laser according to the received laser control signal, so that the femtosecond laser can perform welding according to the welding path set by the laser parameter data; and adjusts the power and frequency of the femtosecond laser so that the emitted femtosecond laser reaches the power and frequency corresponding to the laser parameter data; After completing the laser parameter adjustment and welding path setting of the femtosecond laser, the laser welding equipment emits the adjusted femtosecond laser from the femtosecond laser output end, and welds the target welding points at the edges of the chip glass and the back panel glass according to the set welding path.

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