Laser processing equipment and processing system

Abstract

The utility model relates to the technical field of solar cell processing equipment, in particular to laser processing equipment and a processing system. The laser processing equipment comprises a discharging platform, a voltage loading mechanism and a laser. The material placing platform is provided with a placing surface, and the placing surface is configured to place a plurality of solar cells and a welding strip used for connecting the plurality of solar cells in series. The voltage loading mechanism is configured to be in contact with the welding strip and apply voltage to the solar cells through the welding strip. The laser is configured to weld the welding strip on the solar cells, and the laser is further configured to perform laser-induced sintering on the solar cells when the voltage loading mechanism applies voltage to the solar cells. According to the laser processing equipment, the welding strip used during series welding is ingeniously used as a conductive structure, and voltage is applied to the solar cells in series welding through the welding strip, so that series welding and laser-induced sintering can be carried out in one laser processing equipment, the processing efficiency is improved, and the equipment cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of solar cell processing equipment, and in particular to a laser processing equipment and a processing system. Background Art

[0002] String soldering and laser induced firing (LIF) of solar cells are two of the processes in solar cell processing. In the related art, string soldering and laser induced firing are carried out by two sets of equipment respectively. Specifically, an infrared welding equipment is used for the string soldering process. For the laser induced firing process, the solar cells after the string soldering process are first transported to a laser sintering equipment and then processed in the laser sintering equipment. This method has low processing efficiency, and the two sets of equipment need to be purchased separately, resulting in high equipment costs. Summary of the Utility Model

[0003] Embodiments of the present application disclose a laser processing equipment and a processing system, which can implement laser welding and laser induced firing.

[0004] To achieve the above object, in a first aspect, embodiments of the present application disclose a laser processing equipment, including:

[0005] A feeding platform, the feeding platform has a placement surface, and the placement surface is configured to place a plurality of solar cells and solder tapes for connecting the plurality of solar cells in series;

[0006] A voltage loading mechanism, the voltage loading mechanism is configured to contact the solder tape and apply a voltage to each solar cell through the solder tape; and

[0007] A laser, the laser is configured to weld the solder tape on the solar cell, and the laser is further configured to perform laser induced firing on the solar cell when the voltage loading mechanism applies a voltage to each solar cell.

[0008] In a possible implementation manner of the first aspect, the voltage loading mechanism includes:

[0009] A conductive member, the conductive member has a contact surface, and the contact surface is configured to press on the solder tape and cooperate with the solder tape in a concave-convex manner.

[0010] In a possible implementation manner of the first aspect, the voltage loading mechanism further includes:

[0011] A pressing plate, in a direction perpendicular to the placement surface, the pressing plate is disposed opposite to the placement surface; the number of the conductive members is multiple, and the multiple conductive members are all disposed on a side of the pressing plate facing the placement surface, and each conductive member is configured to press on each solder tape respectively; and

[0012] A first displacement component, the first displacement component is drivingly connected to the pressing plate, and the first displacement component is configured to drive the pressing plate to displace relative to the placement surface in the length direction of the welding tape and in a direction perpendicular to the placement surface.

[0013] In a possible implementation of the first aspect, the first displacement component includes a first displacement driver and a second displacement driver;

[0014] The first displacement driver is drivingly connected to the second displacement driver, and the first displacement driver is configured to drive the second displacement driver to displace relative to the placement surface in the length direction of the welding tape;

[0015] The pressing plate is drivingly connected to the second displacement driver, and the second displacement driver is configured to drive the pressing plate to displace in a direction perpendicular to the placement surface.

[0016] In a possible implementation of the first aspect, the material feeding platform includes a conveyor belt, and the placement surface is the upper surface of the conveyor belt.

[0017] In a possible implementation of the first aspect, the number of the voltage loading mechanisms is two, and in the conveying direction of the conveyor belt, the laser is located between the two voltage loading mechanisms;

[0018] and / or, the laser is located above the conveyor belt;

[0019] and / or, the voltage loading mechanism is located above the conveyor belt.

[0020] In a possible implementation of the first aspect, the laser processing device further includes:

[0021] A heating element, the heating element is disposed on the conveyor belt. In the conveying direction of the conveyor belt, the placement surface includes a preheating area and a processing area arranged in sequence; the heating element is correspondingly arranged with the preheating area, and the heating element is configured to heat the solar cell on the preheating area; the laser is oppositely arranged with the processing area.

[0022] In a possible implementation of the first aspect, the laser processing device further includes:

[0023] A rectifying mechanism, in the conveying direction of the conveyor belt, the rectifying mechanism is located in front of the laser; the rectifying mechanism includes a first rectifying member, a second rectifying member and a distance adjusting device;

[0024] The first alignment member and the second alignment member are respectively located on two side edges of the placement surface and are both drivingly connected to the distance adjustment device. The distance adjustment device is configured to adjust the distance between the first alignment member and the second alignment member. The first alignment member and the second alignment member are configured to respectively abut against two side edges of the solar cell.

[0025] In a possible implementation manner of the first aspect, the laser processing device further includes a second displacement assembly. The laser is drivingly connected to the second displacement assembly. The second displacement assembly is configured to drive the laser to displace in a direction perpendicular to the placement surface.

[0026] In a second aspect, an embodiment of the present application discloses a processing system, including the laser processing device as described in the first aspect and a plurality of light-transmitting insulating pressing tools;

[0027] The light-transmitting insulating pressing tool includes a pressing surface. The pressing surface is configured to be attached to the placement surface to press the solar cell and the welding tape on the placement surface, and ends of part of the welding tape protrude from the light-transmitting insulating pressing tool; the voltage loading mechanism is configured to contact the protruding part of the welding tape.

[0028] In a possible implementation manner of the second aspect, a limiting groove is provided on the pressing surface. The limiting groove is configured to match the shape of the welding tape to limit the welding tape in the limiting groove;

[0029] The solar cell is a back-contact solar cell. A plurality of parts to be welded are provided on the back surface of the back-contact solar cell. A plurality of convex parts are provided in the limiting groove. Each convex part is configured to be correspondingly arranged with each part to be welded. The convex part is used to abut against the welding tape so that part of the welding tape protrudes from the limiting groove to contact the part to be welded.

[0030] Compared with the prior art, the beneficial effects of the present application are as follows: The laser of the laser processing device can be used for laser welding of solar cells. In addition, the laser processing device cleverly uses the welding tape used in series welding as a conductive structure. The voltage loading mechanism applies voltage to each solar cell through the welding tape, thereby meeting the processing conditions of laser-induced sintering. Then, the laser performs laser-induced sintering on the solar cell, enabling series welding and laser-induced sintering to be carried out in one laser processing device, thereby improving the versatility and processing efficiency of the device and reducing the device cost. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0032] Figure 1 Stereogram of a laser processing device disclosed in an embodiment of the present application;

[0033] Figure 2 For Figure 1 Schematic diagram of placing multiple solar cells and solder tapes on the placement surface in ;

[0034] Figure 3 Structural schematic diagram of a laser processing device disclosed in an embodiment of the present application;

[0035] Figure 4 For Figure 3 Cross-sectional view of the A-A section shown in ;

[0036] Figure 5 For Figure 4 Schematic diagram of the conductive member pressing the solder tape in ;

[0037] Figure 6 For Figure 3 Cross-sectional view of the B-B section shown in ;

[0038] Figure 7 For Figure 3 Cross-sectional view of the C-C section shown in ;

[0039] Figure 8 Structural schematic diagram of a processing system disclosed in an embodiment of the present application;

[0040] Figure 9 Structural schematic diagram of a light-transmitting insulating press tool disclosed in an embodiment of the present application;

[0041] Figure 10 For Figure 9 Cross-sectional view of the D-D section shown in ;

[0042] Figure 11 Schematic diagram of the light-transmitting insulating press tool pressing the solder tape and the back-contact solar cell disclosed in an embodiment of the present application;

[0043] Figure 12 For Figure 11 Cross-sectional view of the E-E section shown in.

[0044] Explanation of reference numerals:

[0045] 100. Laser processing equipment; 110. Feeding platform; 111. Placing surface; 112. Conveyor belt; 1111. Preheating area; 1112. Processing area; 120. Voltage loading mechanism; 121. Conductive part; 1211. Contact surface; 122. Pressing plate; 123. First displacement assembly; 1231. First displacement driver; 1232. Second displacement driver; 130. Laser; 140. Heating element; 150. Alignment mechanism; 151. First alignment part; 152. Second alignment part; 153. Spacing adjustment device; 154. Connecting plate; 160. Second displacement assembly; 161. Mounting bracket; 162. Motor; 163. Lead screw; 164. Nut; 165. Slide; 166. Slide rail; 200. Solar cell; 201. Back surface; 202. Welding part to be welded; 203. Insulating adhesive layer; 204. Avoidance groove; 300. Welding tape; 400. Transparent insulating press tool; 401. Pressing surface; 402. Limiting groove; 403. Convex part. Detailed implementation manners

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0047] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "inner", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0048] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific situations.

[0049] In addition, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0050] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components or parts. Unless otherwise specified, the meaning of "a plurality of" is two or more.

[0051] The technical solution of the present utility model will be described below in conjunction with embodiments and drawings.

[0052] In a first aspect, please refer to Figure 1 and Figure 2 , an embodiment of the present application discloses a laser processing device 100, including a loading platform 110, a voltage loading mechanism 120, and a laser 130.

[0053] The loading platform 110 has a placement surface 111, and the placement surface 111 is configured to place a plurality of solar cells 200 and the solder tapes 300 for connecting the plurality of solar cells 200 in series. Optionally, the loading platform 110 may be a mobile platform including a conveyor belt or the like, or a fixed platform such as a workbench.

[0054] The voltage loading mechanism 120 is configured to contact the solder tape 300 and apply a voltage to each solar cell 200 through the solder tape 300. Optionally, the voltage loading mechanism 120 is disposed at any position capable of contacting the solder tape 300. For example, the voltage loading mechanism 120 is disposed opposite to the placement surface 111. Alternatively, the voltage loading mechanism 120 and the loading platform 110 are relatively movable, and during laser-induced sintering, the voltage loading mechanism 120 moves to a position capable of contacting the solder tape 300.

[0055] The laser 130 is configured to weld the solder tape 300 to the solar cell 200, and the laser 130 is further configured to perform laser-induced sintering on the solar cell 200 when the voltage loading mechanism 120 applies a voltage to each solar cell 200. Optionally, the laser 130 is disposed at any position capable of irradiating the solar cell 200. For example, the laser 130 is disposed opposite to the placement surface 111. Alternatively, the laser 130 and the loading platform 110 are relatively movable, and during laser processing, the laser 130 moves to a position capable of irradiating the solar cell 200.

[0056] The laser 130 of the laser processing device 100 can be used for laser welding of solar cells 200. In addition, the laser processing device 100 cleverly utilizes the welding tape 300 used in series welding as a conductive structure, and the voltage loading mechanism 120 applies voltage to each solar cell 200 through the welding tape 300, thereby meeting the processing conditions of laser induced sintering. Then, the laser 130 performs laser induced sintering on the solar cells 200, enabling series welding and laser induced sintering to be carried out in a single laser processing device 100, thereby improving the versatility and processing efficiency of the device and reducing the device cost.

[0057] In some embodiments, referring to Figure 3 , the loading platform 110 includes a conveyor belt 112, and the placement surface 111 is the upper surface of the conveyor belt 112. Using the upper surface of the conveyor belt 112 as the placement surface 111 during the processing of the solar cells 200 facilitates the loading and unloading and arrangement of the solar cells 200.

[0058] Exemplarily, as Figure 3 shown, the number of voltage loading mechanisms 120 is two, and the conveying direction of the conveyor belt 112 is the Y0 - Y1 direction as shown in Figure 3 . In the conveying direction of the conveyor belt 112, the laser 130 is located between the two voltage loading mechanisms 120.

[0059] Figure 3 The Z0 - Z1 direction in Figure 3 is the vertical direction. In

[0060] the laser 130 is located above the conveyor belt 112. The voltage loading mechanisms 120 are located above the conveyor belt 112. The two voltage loading mechanisms 120 respectively energize and apply a bias voltage to the welding tapes 300 at both ends of the solar cell string, avoiding blocking between the laser 130 and the solar cells 200, and thus avoiding affecting laser processing. The middle laser 130 then performs laser processing on each solar cell 200. Figure 3 As

[0061] The heating element 140 is disposed on the conveyor belt 112. In the conveying direction of the conveyor belt 112, the placement surface 111 includes a preheating area 1111 and a processing area 1112 arranged in sequence. The heating element 140 is correspondingly arranged with the preheating area 1111. The heating element 140 is configured to heat the solar cell 200 on the preheating area 1111, and the laser 130 is oppositely arranged with the processing area 1112. When the solar cell 200 is conveyed on the conveyor belt 112, it first passes through the preheating area 1111 and is preheated and heated up by the heating element 140, and then passes through the processing area 1112 for laser welding and laser-induced sintering. The welding quality and sintering effect of the preheated solar cell 200 are both improved.

[0062] Exemplarily, the heating element 140 can be arranged inside the loading platform 110, that is, the heating element 140 can be arranged on the lower side of the placement surface 111, so as to heat the solar cell 200 on the preheating area 1111. Alternatively, in other examples, the heating element 140 can also be movably arranged with the loading platform 110. When heating is required, the heating element 140 can move to the position corresponding to the preheating area 1111 to heat the solar cell 200 on the preheating area 1111.

[0063] In some embodiments, as Figures 3 to 5 shown, the voltage loading mechanism 120 includes a conductive member 121. Optionally, the conductive member 121 can be a probe, a conductive terminal or a conductive post. The conductive member 121 is electrically connected to an external power supply.

[0064] The conductive member 121 has a contact surface 1211, and the contact surface 1211 is configured to press on the solder tape 300 and cooperate with the solder tape 300 in a concave-convex manner. Exemplarily, the contact surface 1211 is a concave surface, and the surface of the solder tape 300 is a convex surface. When the conductive member 121 presses on the solder tape 300, the concave surface and the convex surface cooperate in a concave-convex manner, thereby fixing the solder tape 300 and preventing the solder tape 300 from detaching from the conductive member 121. Alternatively, conversely, the contact surface can be a convex surface, and the surface of the solder tape is a concave surface, so as to achieve concave-convex cooperation to fix the solder tape.

[0065] More specifically, when the conductive member 121 is configured to be located above the solder tape 300, that is, the conductive member 121 presses on the solder tape 300 by pressing down, the contact surface 1211 is the bottom surface of the conductive member 121.

[0066] Optionally, as Figures 3 to 5 shown, the voltage loading mechanism 120 further includes a pressing plate 122. In the direction perpendicular to the placement surface 111, the pressing plate 122 is oppositely arranged with the placement surface 111. The number of the conductive members 121 is multiple, and the multiple conductive members 121 are all arranged on the side of the pressing plate 122 facing the placement surface 111. Each conductive member 121 is configured to press on each solder tape 300 respectively. Among them, the direction perpendicular to the placement surface 111 is asFigure 3 and Figure 4 in the Z0-Z1 direction shown in

[0067] Optionally, the voltage loading mechanism 120 further includes a first displacement component 123. The first displacement component 123 is drivingly connected to the pressing plate 122, and is configured to drive the pressing plate 122 to displace relative to the placement surface 111 in the length direction of the welding tape 300 and in a direction perpendicular to the placement surface 111. The placement surface 111 is in the length direction of the welding tape 300 as Figure 3 shown in the Y0-Y1 direction in

[0068] By setting the pressing plate 122 to displace in a direction perpendicular to the placement surface 111, it can be close to or away from the placement surface 111. When the pressing plate 122 approaches the placement surface 111, each conductive member 121 presses each welding tape 300 respectively to fix the welding tape 300 and make electrical connection with the welding tape 300. When the pressing plate 122 moves away from the placement surface 111, each conductive member 121 disengages from each welding tape 300 respectively to disconnect the connection.

[0069] The pressing plate 122 displaces relative to the placement surface 111 in the length direction of the welding tape 300. Since the length direction of the welding tape 300 is the same as the string length direction of the solar cell string obtained by series welding. The term "solar cell string" refers to a battery string obtained by connecting multiple solar cells 200 in series through welding tapes 300. It can be understood that when the number, size, and spacing of the solar cells 200 change, the string length of the obtained solar cell string will also change. And the voltage loading mechanism 120 can adjust the position of the pressing plate 122 according to the string length of the solar cell string, improving the versatility of the device.

[0070] Exemplarily, the direction perpendicular to the placement surface 111 can be the vertical direction, and the length direction of the welding tape 300 is the horizontal direction.

[0071] Optionally, referring to Figure 4 , the first displacement component 123 includes a first displacement driver 1231 and a second displacement driver 1232. The first displacement driver 1231 is drivingly connected to the second displacement driver 1232, and is configured to drive the second displacement driver 1232 to displace relative to the placement surface 111 in the length direction of the welding tape 300. The pressing plate 122 is drivingly connected to the second displacement driver 1232, and the second displacement driver 1232 is configured to drive the pressing plate 122 to displace in a direction perpendicular to the placement surface 111. Exemplarily, the first displacement driver 1231 can include an electric cylinder and a linear motor, and the second displacement driver 1232 can include a cylinder or an electric cylinder.

[0072] Preferably, please refer to Figure 3 and Figure 6, the laser processing device 100 further includes a rectifying mechanism 150. In the conveying direction of the conveyor belt 112, the rectifying mechanism 150 is located in front of the laser 130. The rectifying mechanism 150 includes a first rectifying member 151, a second rectifying member 152, and a distance adjusting device 153. Optionally, the distance adjusting device 153 is a parallel opening and closing type air gripper. The first rectifying member 151 and / or the second rectifying member 152 is a roller. The first rectifying member 151 and the second rectifying member 152 can be respectively connected to two piston rods of the parallel opening and closing type air gripper through a connecting plate 154.

[0073] The first rectifying member 151 and the second rectifying member 152 are respectively located on two sides of the placement surface 111 and are both drivingly connected to the distance adjusting device 153. Please refer to Figure 6 , in Figure 6 , the first rectifying member 151 and the second rectifying member 152 are respectively located on two sides of the placement surface 111 in the X0-X1 direction. The distance adjusting device 153 is configured to adjust the distance between the first rectifying member 151 and the second rectifying member 152, and the first rectifying member 151 and the second rectifying member 152 are configured to respectively abut against two sides of the solar cell 200.

[0074] When the solar cell 200 is loaded onto the conveyor belt 112, there is a situation of position deviation. If the position of the solar cell 200 is not adjusted, subsequent laser processing will also be affected, and a qualified solar cell string cannot be manufactured. The laser processing device 100 precisely adjusts the position of the solar cell 200 through the rectifying mechanism 150 so that it is placed according to the preset position.

[0075] More specifically, the first rectifying member 151 and the second rectifying member 152 are respectively located on two sides of the placement surface 111. For the solar cell 200 conveyed on the placement surface 111, its two sides respectively abut against the first rectifying member 151 and the second rectifying member 152, and the first rectifying member 151 and the second rectifying member 152 cooperate with each other to adjust the position of the solar cell 200. And the distance between the first rectifying member 151 and the second rectifying member 152 can be adjusted by the distance adjusting device 153, and the distance between the two can be adjusted according to the size of the solar cell 200, so that the rectifying mechanism 150 is adapted to solar cells 200 of various sizes. In some embodiments, please combine Figure 3 and Figure 7 , the laser processing device 100 further includes a second displacement assembly 160. The laser 130 is drivingly connected to the second displacement assembly 160, and the second displacement assembly 160 is configured to drive the laser 130 to displace in a direction perpendicular to the placement surface 111, so that the laser 130 can adjust its position in a direction perpendicular to the placement surface 111 according to the processing requirements.

[0076] Exemplarily, the second displacement assembly 160 includes a mounting bracket 161, a motor 162, a lead screw 163, a nut 164, a sliding seat 165, and a slide rail 166. The motor 162 is fixedly arranged on the mounting bracket 161. The lead screw 163 is rotatably arranged on the mounting bracket 161 and is drivingly connected to the motor 162. The nut 164 is connected to the lead screw 163. The sliding seat 165 is fixedly connected to the nut 164 and is slidably connected to the slide rail 166. The laser 130 is arranged on the sliding seat 165. As another example, the second displacement assembly 160 can also be a rack and pinion mechanism or a linear motor mechanism.

[0077] In a second aspect, as Figure 8 shown, an embodiment of the present application discloses a processing system, including the laser processing device 100 as described in the first aspect and a plurality of light-transmitting insulating pressing tools 400. Optionally, the material of the light-transmitting insulating pressing tool 400 can be glass or a transparent polymer material, and its structure can be a plate-like structure or a mesh structure.

[0078] The light-transmitting insulating pressing tool 400 includes a pressing surface 401, and the pressing surface 401 is configured to be attached to the placement surface 111 to press the solar cell 200 and the welding tape 300 on the placement surface 111, and the ends of some of the welding tapes 300 extend out of the light-transmitting insulating pressing tool 400. The voltage loading mechanism 120 is configured to contact the extended part of the welding tape 300.

[0079] The light-transmitting insulating pressing tool 400 can be transported to the placement surface 111 by a handling device such as a manipulator to press the solar cell 200 and the welding tape 300 that have been placed on the placement surface 111, thereby fixing the positions of the welding tape 300 and the solar cell 200. The laser beam emitted by the laser 130 can pass through the light-transmitting insulating pressing tool 400 and irradiate on the solar cell 200 and the welding tape 300. When the light-transmitting insulating pressing tool 400 presses the welding tape 300 and the solar cell 200, the positive and negative electrodes of the welding tape 300 and the solar cell 200 are both in contact with the light-transmitting insulating pressing tool 400. When the voltage loading mechanism 120 energizes the solar cell 200 through the welding tape 300, the light-transmitting insulating pressing tool 400 can prevent a short circuit phenomenon from occurring between the positive and negative electrodes of the solar cell 200.

[0080] Further, please refer to Figures 9 to 12 . A limiting groove 402 is provided on the pressing surface 401, and the limiting groove 402 is configured to match the shape of the welding tape 300 to limit the welding tape 300 within the limiting groove 402. The light-transmitting insulating pressing tool 400 can also limit the position of the welding tape 300, making the position of the welding tape 300 relatively fixed, which is conducive to the stable progress of processing.

[0081] The solar cell 200 is a back-contact solar cell. There are a number of parts to be welded 202 on the back surface 201 of the back-contact solar cell. The positive and negative electrodes of the back-contact solar cell are both located on the back surface 201. To avoid leakage of the positive and negative electrodes, an insulating glue layer 203 is also provided on the back surface 201 of the back-contact solar cell. An avoidance groove 204 is provided on the insulating glue layer 203. The parts to be welded 202 are exposed through the avoidance groove 204, but the height of the parts to be welded 202 is lower than the depth of the avoidance groove 204, resulting in difficulty for the welding tape 300 to directly contact the parts to be welded 202.

[0082] In order to enable the welding tape 300 to contact the parts to be welded 202 in the avoidance groove 204, in this application, a number of convex parts 403 are provided in the limit groove 402. Each convex part 403 is configured to be correspondingly arranged with each part to be welded 202. The convex part 403 is used to abut against the welding tape 300 so that a part of the welding tape 300 protrudes from the limit groove 402 to contact the parts to be welded 202. The shape of the convex part 403 can be hemispherical or rectangular. In the thickness direction of the transparent insulating pressing tool 400, the convex part 403 preferably protrudes from one end of the limit groove 402 away from the pressing surface 401. The height H of the convex part 403 is less than the depth D of the limit groove 402, and the sum of the height H of the convex part 403 and the thickness T of the welding tape 300 is greater than the depth D of the limit groove 402, so that the welding tape 300 protrudes from the limit groove 402 when the convex part 403 abuts against the welding tape 300.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A laser processing device, characterized in that, Comprising: A material feeding platform, the material feeding platform having a placement surface configured to place a plurality of solar cells and solder tapes for connecting the plurality of solar cells in series; A voltage loading mechanism configured to contact the solder tape and apply a voltage to each of the solar cells through the solder tape; And A laser configured to weld the solder tape to the solar cell, and further configured to perform laser-induced sintering on the solar cell when the voltage loading mechanism applies a voltage to each of the solar cells.

2. The laser processing device according to claim 1, wherein The voltage loading mechanism includes: A conductive member having a contact surface configured to press against the solder tape and engage with the solder tape in a concave-convex manner.

3. The laser processing device according to claim 2, characterized in that, The voltage loading mechanism further includes: A pressing plate disposed opposite to the placement surface in a direction perpendicular to the placement surface; the number of the conductive members is plural, and the plural conductive members are all disposed on a side of the pressing plate facing the placement surface, each conductive member being configured to press against each solder tape respectively; and A first displacement assembly drivingly connected to the pressing plate and configured to drive the pressing plate to displace relative to the placement surface in a length direction of the solder tape and in a direction perpendicular to the placement surface.

4. The laser processing equipment according to claim 3, characterized in that, The first displacement assembly includes a first displacement driver and a second displacement driver; The first displacement driver is drivingly connected to the second displacement driver and configured to drive the second displacement driver to displace relative to the placement surface in the length direction of the solder tape; The pressing plate is drivingly connected to the second displacement driver and the second displacement driver is configured to drive the pressing plate to displace in a direction perpendicular to the placement surface.

5. The laser processing apparatus according to any one of claims 1 to 4, characterized in that, The material feeding platform includes a conveyor belt, and the placement surface is an upper surface of the conveyor belt.

6. The laser processing device according to claim 5, wherein The number of the voltage loading mechanisms is two, and the laser is located between the two voltage loading mechanisms in a conveying direction of the conveyor belt; And / or, the laser is located above the conveyor belt; And / or, the voltage loading mechanism is located above the conveyor belt.

7. The laser processing device according to claim 5, wherein, The laser processing equipment further includes: A heating member disposed on the conveyor belt. In the conveying direction of the conveyor belt, the placement surface includes a preheating area and a processing area arranged in sequence; the heating member is correspondingly arranged with the preheating area and configured to heat the solar cells on the preheating area; the laser is disposed opposite to the processing area.

8. The laser processing device according to claim 5, characterized in that, The laser processing equipment further includes: A rectifying mechanism located in front of the laser in the conveying direction of the conveyor belt; the rectifying mechanism includes a first rectifying member, a second rectifying member and a distance adjusting device; The first rectifying member and the second rectifying member are respectively located at two side ends of the placement surface and are both drivingly connected to the distance adjusting device. The distance adjusting device is configured to adjust a distance between the first rectifying member and the second rectifying member, and the first rectifying member and the second rectifying member are configured to respectively abut against two side edges of the solar cell.

9. The laser processing apparatus according to any one of claims 1 to 4, characterized in that, The laser processing device further includes a second displacement component, the laser is drivingly connected to the second displacement component, and the second displacement component is configured to drive the laser to displace in a direction perpendicular to the placement surface.

10. A processing system, characterized in that, Comprising the laser processing device according to any one of claims 1 to 9 and a plurality of light-transmitting insulating pressing tools; The light-transmitting insulating pressing tool includes a pressing surface, and the pressing surface is configured to fit with the placement surface to press the solar cell and the solder tape on the placement surface, and the ends of some of the solder tapes protrude from the light-transmitting insulating pressing tool; the voltage loading mechanism is configured to contact the protruding part of the solder tape.

11. The processing system according to claim 10, characterized in that, A limiting groove is provided on the pressing surface, and the limiting groove is configured to match the shape of the solder tape to limit the solder tape in the limiting groove; The solar cell is a back-contact solar cell, and a plurality of parts to be welded are provided on the back surface of the back-contact solar cell. A plurality of convex parts are provided in the limiting groove, and each convex part is configured to be correspondingly arranged with each part to be welded. The convex part is used to abut against the solder tape so that a part of the solder tape protrudes from the limiting groove to contact the part to be welded.

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