Welding equipment

Abstract

The utility model discloses welding equipment, and belongs to the technical field of photovoltaics. The welding equipment comprises a feeding end, a carrying tool and a welding mechanism. The carrying tool is movably arranged between the feeding end and the welding mechanism and is configured to bear and temporarily fix a battery piece and drive the battery piece to move to the welding mechanism from the feeding end, the light receiving face of the battery piece faces the carrying tool, and the backlight face of the battery piece deviates from the carrying tool; and the welding mechanism is configured to weld the backlight surface of the battery piece. The process flow can be simplified, the energy consumption can be reduced, the high warping degree and fragmentation risk of the battery piece can be reduced, the welding effect can be improved, and the battery reliability can be improved.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic technology, and particularly relates to a welding device. Background Art

[0002] The positive and negative electrodes of a back-contact cell are both arranged on the backlight side, and there are no grid lines on the light-receiving side. During the process of welding the backlight side of the cell, the light-receiving side of the cell faces the conveyor belt. The light-receiving side of the cell is easily worn during the movement of the cell.

[0003] In order to avoid damage to the light-receiving side of the cell, in the related art, after printing solder on the backlight side of the cell, the solder is dried, and the cell is flipped so that the backlight side of the cell faces the conveyor belt. When the cell is conveyed to the welding station, the backlight side of the cell is welded by a heat conduction method. However, the drying of the solder and the flipping of the cell increase the process flow, increase energy consumption, increase the risk of high warpage and cell fragmentation, and the welding by the heat conduction method affects the welding effect. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application provides a welding device, which can simplify the process flow, reduce energy consumption, reduce the risk of high warpage and fragmentation of the cell, improve the welding effect, and improve the reliability of the cell.

[0005] This application provides a welding device, including a loading end, a carrier, and a welding mechanism;

[0006] The carrier is movably arranged between the loading end and the welding mechanism, and is configured to carry and temporarily fix the cell, and drive the cell to move from the loading end to the welding mechanism. The light-receiving side of the cell faces the carrier, and the backlight side of the cell faces away from the carrier;

[0007] The welding mechanism is configured to weld the backlight side of the cell.

[0008] According to the welding device of this application, by setting the carrier, the cell is temporarily fixed on the carrier. The light-receiving side of the cell faces the carrier, and there is no relative movement between the cell and the carrier. The light-receiving side of the cell will not be damaged by the carrier. The backlight side of the cell faces away from the carrier, that is, the backlight side of the cell does not contact the carrier. There is no need to dry the solder on the backlight side of the cell, which simplifies the process flow, reduces energy consumption, and reduces the risk of cell warpage caused by high-temperature drying, thereby reducing the risk of fragmentation and the risk of insufficient lap welding area in subsequent lamination welding. Moreover, the backlight side of the cell is directly welded without using a heat conduction welding method, which further reduces energy consumption and improves the welding effect, thereby improving the reliability of the cell.

[0009] According to an embodiment of the present application, the vehicle includes a bearing surface configured to bear a plurality of the battery cells arranged in sequence along the moving direction of the vehicle.

[0010] According to an embodiment of the present application, the bearing surface has vacuum suction holes configured to adsorb and fix the battery cells on the bearing surface.

[0011] According to an embodiment of the present application, the bearing surface is a high-temperature resistant surface.

[0012] According to an embodiment of the present application, the high-temperature resistant surface includes at least one of an aluminum alloy surface and a stainless steel surface.

[0013] According to an embodiment of the present application, the bearing surface is a smooth plane.

[0014] According to an embodiment of the present application, the welding device further includes a linear module fixedly connected to the vehicle and configured to drive the vehicle to move.

[0015] According to an embodiment of the present application, the backlight surface of the battery cell has main grid lines with opposite polarities, and solder that has not dried is on the main grid lines;

[0016] The welding device further includes a solder strip laying mechanism disposed near the loading end, or the solder strip laying mechanism is disposed at a position between the loading end and the welding mechanism, or the solder strip laying mechanism is disposed near the welding mechanism. The solder strip laying mechanism is configured to lay a solder strip on the backlight surface of the battery cell, and the solder strip covers the solder;

[0017] The welding mechanism is further configured to fuse the solder strip and the solder to weld the solder strip to the backlight surface of the battery cell.

[0018] According to an embodiment of the present application, the welding device further includes a first transfer mechanism disposed near the loading end and configured to transfer the battery cell onto the vehicle.

[0019] According to an embodiment of the present application, the vehicle is further configured to release the temporary fixation of the battery cell when the welding of the battery cell is completed;

[0020] The welding device further includes a second transfer mechanism disposed near the welding mechanism and configured to transfer the battery cell out of the vehicle;

[0021] The vehicle is further configured to move back from the welding mechanism to the loading end.

[0022] One or more of the above technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0023] By providing a carrier, the solar cell is temporarily fixed on the carrier, the light-receiving surface of the solar cell faces the carrier, there is no relative movement between the solar cell and the carrier, the light-receiving surface of the solar cell will not be damaged by the carrier, the backlight surface of the solar cell faces away from the carrier, that is, the backlight surface of the solar cell does not contact the carrier, and there is no need to perform solder drying treatment on the backlight surface of the solar cell, which simplifies the process flow, reduces energy consumption, and reduces the risk of warping of the solar cell caused by high-temperature drying, thereby reducing the risk of fragmentation and the risk of insufficient lap area for subsequent lamination welding. Moreover, the backlight surface of the solar cell is directly welded without using a heat conduction welding method, which further reduces energy consumption and improves the welding effect, thereby improving the reliability of the battery.

[0024] Some of the additional aspects and advantages of the present application will be given below, some will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is one of the schematic structural diagrams of the welding device provided by the embodiment of the present application;

[0027] Figure 2 is the schematic structural diagram of the solar cell provided by the embodiment of the present application;

[0028] Figure 3 is another schematic structural diagram of the welding device provided by the embodiment of the present application;

[0029] Figure 4 is the third schematic structural diagram of the welding device provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0031] The welding device provided by the embodiment of the present application will be described below with reference to the drawings.

[0032] Figure 1 is the schematic structural diagram of the welding device provided by the embodiment of the present application.

[0033] As Figure 1 shown, the welding device provided by the embodiment of the present application includes a carrier 1, a welding mechanism 2, and a loading end 3. Among them, the loading end 3 is a port for feeding the battery cell 4 into the welding device from the outside. The welding mechanism 2 is a device for performing welding operations on the battery cell 4, that is, the welding station of the welding device is located at the welding mechanism 2. For example, the welding structure 2 may include a heating device for heating and welding the battery cell 4. The welding mechanism 2 may also include other devices, which are not specifically limited here.

[0034] The carrier 1 is movably arranged between the loading end 3 and the welding mechanism 2, so that the carrier 1 can reciprocate between the loading end 3 and the welding mechanism 2. When the carrier 1 moves to the position of the welding mechanism 2, the carrier 1 is located below the welding mechanism 2. In some embodiments, the welding device further includes a track 30. One end of the track 30 can be used as the loading end 3, and the other end of the track 30 can be located below the welding mechanism 2. The carrier 1 is slidably arranged on the track 30 so that the carrier 1 can reciprocate between the loading end 3 and the welding mechanism 2. It should be noted that the carrier 1 can also move between the loading end 3 and the welding mechanism 2 in other ways, which are not specifically limited here.

[0035] The carrier 1 is configured to carry and temporarily fix the battery cell 4, and drive the battery cell 4 to move from the loading end 3 to the welding mechanism 2, and the backlight surface of the battery cell faces away from the carrier. During the process of the carrier 1 moving from the loading end 3 to the welding mechanism 2, the battery cell 4 can be temporarily fixed on the carrier 1. Temporary fixation is a temporary fixation method to maintain the stability of the battery cell 4 and prevent the battery cell 4 from moving or shifting, etc. The welding mechanism 2 is configured to weld the backlight surface of the battery cell 4. During the process of welding the backlight surface of the battery cell 4, the battery cell 4 is still temporarily fixed on the carrier 1 to ensure the stability and accuracy of the welding of the battery cell 4.

[0036] In the actual application process, the carrier 1 moves to the loading end 3, and the battery cell 4 is placed on the carrier 1. The light-receiving surface of the battery cell 4 faces the carrier 1, and the backlight surface of the battery cell 4 faces away from the carrier 1, that is, the light-receiving surface of the battery cell 4 is downward and the backlight surface is upward and placed on the carrier 1. The battery cell 4 is temporarily fixed on the carrier 1 to prevent the battery cell 4 from moving or shifting on the carrier 1. The carrier 1 moves from the loading end 3 to the welding mechanism 2, thereby driving the battery cell 4 to move from the loading end 3 to the welding mechanism 2. When the carrier 1 drives the battery cell 4 to move to the position of the welding mechanism 2, the welding mechanism 2 heats and welds the backlight surface of the battery cell 4.

[0037] The cell 4 can be a back-contact cell, such as an Interdigitated Back Contact (IBC) cell. The cell 4 has a light-receiving surface and a light-back surface. The light-receiving surface refers to the side of the cell 4 facing the light, and the light-back surface is arranged opposite to the light-receiving surface. As Figure 2 shown, the light-back surface of the cell 4 has electrodes 41 with opposite polarities, that is, the positive and negative metal electrodes of the cell 4 are both located on the light-back surface of the cell 4. The positive and negative metal electrodes can be arranged in an interdigitated pattern, that is, the positive and negative metal electrodes can be arranged alternately. The light-receiving surface of the cell 4 has a textured surface structure (i.e., a pyramid structure) 42. The light-receiving surface of the cell 4 has no grid line obstruction, which can maximize the acceptance of light radiation, improve the light absorption efficiency, and thus improve the conversion efficiency.

[0038] The series soldering of the cells 4 is to connect the positive electrode of one cell 4 to the negative electrode of the next cell 4 to achieve the series connection of multiple cells 4. Since the positive and negative metal electrodes of the cell 4 are both located on the light-back surface of the cell 4, the light-back surface of the cell 4 is soldered. In some embodiments, in order to improve the soldering effect, the light-back surface of the cell 4 has solder, which helps to solder the light-back surface of the cell 4. Among them, the solder can be composed of one or more of tin, lead, zinc, bismuth, silver, copper, indium, and tellurium, etc.

[0039] The welding equipment in the related art uses a conveyor belt to convey the cells to the welding station to solder the light-back surface of the cells. Since the light-receiving surface of the cell does not have prominent grid lines, if the light-receiving surface of the cell is placed face down on the conveyor belt, the cell is likely to slip and wear the textured surface of the light-receiving surface due to inertia during movement. In order to avoid frictional damage to the textured surface of the light-receiving surface, the related art places the light-receiving surface of the cell face up, that is, the light-back surface of the cell face down. And the light-back surface of the cell has solder (such as solder paste) for welding. The solder paste is a jelly-like substance and has viscosity and cannot be directly in contact with the conveyor belt. Therefore, the related art first dries the solder paste into solder dots, and then flips the cell so that the light-back surface of the cell is placed face down on the conveyor belt. When the cell is conveyed to the welding station, since the light-back surface of the cell is face down, it is necessary to heat the solder dots by means of heat conduction to solder the light-back surface of the cell. And the drying of the solder paste and the flipping of the cell increase the process flow. Moreover, the drying of the solder paste increases the energy consumption, increases the risk of cell warping, and further increases the risk of cell fragmentation and the risk of insufficient lap area for subsequent lamination welding, reducing the battery reliability. Using the heat conduction method to solder the light-back surface of the cell requires increasing the heating power, further increasing the energy consumption, and affecting the welding effect. In addition, when the solder paste is dried, the activators and organic solvents in the solvent in the solder paste volatilize, further affecting the welding effect and reducing the reliability of the battery.

[0040] Based on this, the welding equipment provided by the embodiments of the present application uses the carrier 1 to convey the battery wafers 4. Although the light-receiving surface of the battery wafer 4 is placed downward on the carrier 1, the battery wafer 4 is temporarily fixed to the carrier 1, that is, there is no relative movement between the battery wafer 4 and the carrier 1, and the velvet structure of the light-receiving surface of the battery wafer 4 will not be scratched by the carrier 1. The backlight surface of the battery wafer 4 is placed upward on the carrier 1, that is, the backlight surface of the battery wafer 4 does not contact the carrier 1, and the solder on the backlight surface of the battery wafer 4 does not need to be dried. That is, the solder on the backlight surface of the battery wafer 4 is undried solder. The solder drying process is cancelled, and there is no need to flip the battery wafer, which simplifies the process flow. Moreover, the cancellation of the solder drying process reduces energy consumption and the risk of warping of the battery wafer caused by high-temperature drying, thereby reducing the risk of fragmentation caused by warping of the battery wafer and the risk of insufficient lap area for subsequent laminated welding, and improving the battery reliability. Moreover, the backlight surface of the battery wafer 4 is upward, that is, the backlight surface of the battery wafer 4 faces the welding mechanism 2, so that the welding mechanism 2 can directly heat and weld the backlight surface of the battery wafer 4 without using a heat conduction welding method, reducing the heating power compared with the related technology, further reducing energy consumption, and improving the welding effect. In addition, canceling the solder drying process can reduce the volatilization of activators in the solder and organic solvents in the solvent at high temperatures, further improving the welding effect and the long-term reliability of the battery.

[0041] In some embodiments, the carrier 1 includes a bearing surface 10, and the bearing surface 10 is located on the upper surface of the carrier 1. For example, the carrier 1 can be in the shape of a horizontally arranged plate. The bearing surface 10 is configured to bear a plurality of battery wafers 4 arranged in sequence along the moving direction X of the carrier 1. When the battery wafers 4 are placed on the carrier 1, the battery wafers 4 are located on the bearing surface 10 of the carrier 1.

[0042] The bearing surface 10 of the carrier 1 can bear one or more battery wafers 4 at the same time. In the case where there are a plurality of battery wafers 4 on the bearing surface 10, the plurality of battery wafers 4 are arranged in sequence along the moving direction X. The moving direction X is the direction in which the carrier 1 reciprocates between the loading end 3 and the welding mechanism 2. Among them, the number of battery wafers 4 simultaneously borne by the bearing surface 10 can be the number of battery wafers in a battery string. For example, if every eleven battery wafers are welded into a battery string, the bearing surface 10 of the carrier 1 can bear eleven battery wafers at the same time.

[0043] The size of the bearing surface 10 can be greater than or equal to the overall arrangement size of the plurality of battery wafers 4 so as to be able to bear a plurality of battery wafers 4 at the same time. Among them, the bearing surface 10 can be rectangular, and the size of the bearing surface 10 can include the length, width and / or area of the bearing surface, etc.

[0044] In some embodiments, the carrying surface 10 has vacuum suction holes. The number of vacuum suction holes can be multiple. After the battery cell 4 is carried on the carrying surface 10, the vacuum suction holes can correspond to the position of the battery cell 4. The multiple vacuum suction holes can also be evenly distributed on the carrying surface 10.

[0045] The vacuum suction holes are configured to adsorb and fix the battery cell 4 on the carrying surface 10 to temporarily fix the battery cell 4 on the carrier 1. For example, the carrying surface 10 of the carrier 1 is provided with vacuum suction holes at least at the position where the battery cell 4 is placed, and the carrier 1 is connected by a pipeline to a device such as a vacuum pump that can create negative pressure at the vacuum suction holes. When the battery cell 4 is placed on the carrying surface 10, the negative pressure device performs a vacuum pumping operation to adsorb the battery cell 4 on the carrying surface 10 of the carrier 1, so that the battery cell 4 is temporarily fixed on the carrying surface 10, avoiding the light-receiving surface of the battery cell from being worn due to inertial slippage during the movement of the carrier 1.

[0046] It should be noted that the battery cell 4 can also be temporarily fixed on the carrier 1 by other means, which is not specifically limited here.

[0047] In some embodiments, the carrying surface 10 is a high-temperature resistant surface. The material used for the carrying surface 10 is a high-temperature resistant material so that the carrying surface 10 can withstand the welding temperature when welding the backlight surface of the battery cell 4. In some embodiments, the materials of the carrier 1 are all high-temperature resistant materials.

[0048] In some embodiments, the high-temperature resistant surface includes at least one of an aluminum alloy surface and a stainless steel surface. The high-temperature resistant surface can also include other types of surfaces, which is not specifically limited here. The material used for the carrying surface 10 can include at least one of aluminum alloy and stainless steel. The carrying surface 10 can also use other high-temperature resistant materials. In some embodiments, the materials of the carrier 1 are all aluminum alloy, stainless steel, etc.

[0049] In some embodiments, the carrying surface 10 is a smooth plane. The battery cell 4 can be placed horizontally on the carrying surface 10 of the carrier 1 to further avoid relative movement between the battery cell 4 and the carrier 1, thereby avoiding damage to the light-receiving surface of the battery cell 4 by the carrier 1. The carrying surface 10 is a smooth surface, reducing the friction between the battery cell 4 and the carrier 1 and further avoiding wear of the light-receiving surface of the battery cell 4 by the carrier 1.

[0050] In some embodiments, the welding device further includes a linear module 5, and the linear module 5 is fixedly connected to the carrier 1. The linear module 5 can be located inside the carrier 1, or at the bottom of the carrier 1, or at other positions, which is not specifically limited here.

[0051] The linear module 5 can achieve precise positioning and linear motion control. The linear module 5 is configured to drive the carrier 1 to move, that is, the linear module 5 can drive the carrier 1 to reciprocate between the loading end 3 and the welding mechanism 2.

[0052] In some embodiments, the backlight surface of the solar cell 4 has main grid lines with opposite polarities, namely the positive main grid line and the negative main grid line. It should be noted that the backlight surface of the solar cell 4 has electrodes with opposite polarities, namely the positive metal electrode and the negative metal electrode. Among them, the positive metal electrode includes the positive main grid line and the positive fine grid line, and the negative metal electrode includes the negative main grid line and the negative fine grid line. The positive fine grid lines and the negative fine grid lines are parallel to each other and arranged in a cross pattern, and the positive main grid line and the negative main grid line are parallel to each other and arranged in a cross pattern. The positive main grid line and the positive fine grid line are perpendicular to each other, and are electrically connected at the perpendicular overlapping position. The negative main grid line and the negative fine grid line are also perpendicular to each other, and are electrically connected at the perpendicular overlapping position. The perpendicular overlapping positions of the positive main grid line and the negative fine grid line, and the perpendicular overlapping positions of the negative main grid line and the positive fine grid line are all insulated by an insulating layer.

[0053] There is solder on the main grid line that has not been dried, that is, both the positive main grid line and the negative main grid line include a welding area. There is solder in the welding area, and the solder is undried solder, which is in the form of a gel and has viscosity. Since the solder has not been dried at this time, the organic solvents in the activator and solvent in the solder have not completely volatilized, which helps to improve the welding effect during welding.

[0054] As Figure 1 shown, the welding equipment further includes a solder tape laying mechanism 6, and the solder tape laying mechanism 6 can be arranged close to the loading end 3. When the carrier 1 moves to the loading end 3, the solder tape laying mechanism 6 can be located above the carrier 1. In other embodiments, as Figure 3 shown, the solder tape laying mechanism 6 can also be located at a position between the loading end 3 and the welding mechanism 2, as Figure 4 shown, the solder tape laying mechanism 6 can also be located at a position close to the welding structure 2.

[0055] The solder tape laying mechanism 6 is configured to lay the solder tape 7 on the backlight surface of the solar cell 4, and the solder tape 7 covers the solder. If the solder tape laying mechanism 6 is arranged close to the loading end 3, then as Figure 1As shown, the carrier 1 moves to the loading end 3, the solar cell 4 is temporarily fixed on the carrier 1, and the solder tape laying mechanism 6 lays the solder tape 7 on the backlight surface of the solar cell 4. The number of solder tapes 7 can be the same as the number of main grid lines on the backlight surface of the solar cell 4, with each main grid line corresponding to one solder tape, that is, each positive main grid line corresponds to one solder tape, and each negative main grid line corresponds to one solder tape. Each solder tape covers the corresponding main grid line, so that each solder tape covers the solder on the corresponding main grid line. After laying the solder tape 7, the carrier 1 moves from the loading end 3 to the welding mechanism 2 to drive the solar cell 4 and the solder tape 7 from the loading end 3 to the welding mechanism 2. The welding mechanism 2 welds the backlight surface of the solar cell 4.

[0056] If the solder tape laying mechanism 6 is located between the loading end 3 and the welding mechanism 2, then as Figure 3 shown, the carrier 1 moves to the loading end 3, the solar cell 4 is temporarily fixed on the carrier 1, and the carrier 1 moves from the loading end 3 to the solder tape laying mechanism 6 to drive the solar cell 4 from the loading end 3 to the solder tape laying mechanism 6. The solder tape laying mechanism 6 lays the solder tape 7 on the backlight surface of the solar cell 4. After laying the solder tape 7, the carrier 1 moves from the solder tape laying mechanism 6 to the welding mechanism 2 to drive the solar cell 4 and the solder tape 7 from the solder tape laying mechanism 6 to the welding mechanism 2. The welding mechanism 2 welds the backlight surface of the solar cell 4.

[0057] If the solder tape laying mechanism 6 is located near the welding structure 2, then as Figure 4 shown, the carrier 1 moves to the loading end 3, the solar cell 4 is temporarily fixed on the carrier 1, and the carrier 1 moves from the loading end 3 to the welding mechanism 2 to drive the solar cell 4 from the loading end 3 to the welding mechanism 2. The solder tape laying mechanism 6 lays the solder tape 7 on the backlight surface of the solar cell 4, and the welding mechanism 2 welds the backlight surface of the solar cell 4.

[0058] Among them, the solder tape laying mechanism 6 can include a solder tape traction device, a lifting mechanism, a pressing tool, etc. The solder tape traction device can traction the solder tape from the feeding part to a predetermined position, the lifting mechanism can drive the solder tape to move up and down to adjust the height and position of the solder tape, and the pressing tool can fix the solder tape. The solder tape laying mechanism 6 can also include other devices, which are not specifically limited here.

[0059] The welding mechanism 2 is also configured to fuse the solder tape 7 with the solder to weld the solder tape 7 to the backlight surface of the solar cell 4. After the solder tape laying mechanism 6 lays and fixes the solder tape 7 on the backlight surface of the solar cell 4, the welding mechanism 2 heats and fuses the solder between the solder tape 7 and the backlight surface of the solar cell 4 to weld the solder tape 7 to the backlight surface of the solar cell 4.

[0060] It should be noted that when the carrier 1 carries multiple solar cells 4, the welding tapes 7 are laid on the multiple solar cells 4, so that the positive main grid line of one solar cell 4 is connected to the negative main grid line of another solar cell 4 through the welding tapes 7. The welding mechanism 2 welds the backlight surfaces of the multiple solar cells 4 and the welding tapes 7 to realize the series connection of the multiple solar cells 4.

[0061] The solder in this embodiment is in a jelly-like state before the solar cells 4 are welded, that is, before the solar cells 4 are welded, the solder is not dried, reducing the volatilization of activators and organic solvents in the solvent at high temperatures, further improving the welding effect and the long-term reliability of the battery.

[0062] In some embodiments, the welding equipment further includes a first transfer mechanism 8, and the first transfer mechanism 8 is disposed close to the loading end 3. The first transfer mechanism 8 is configured to transfer the solar cells 4 onto the carrier 1.

[0063] When the carrier 1 moves to the loading end 3, the first transfer mechanism 8 transfers the solar cells 4 onto the carrier 1, and places the solar cells 4 on the bearing surface 10 of the carrier 1 with the backlight surface facing up and the light-receiving surface facing down. The first transfer mechanism 8 can transfer only one solar cell 4 each time, and after each solar cell 4 is placed on the bearing surface 10 of the carrier 1, the carrier 1 moves one step in the direction of the welding mechanism 2. After the first transfer structure 8 transfers multiple solar cells 4, the multiple solar cells 4 are arranged in sequence along the moving direction X on the bearing surface 10 of the carrier 1. The first transfer mechanism 8 can also transfer multiple solar cells 4 each time, that is, the first transfer mechanism 8 places multiple solar cells 4 on the carrier 1 at the same time, and makes the multiple solar cells 4 arranged in sequence along the moving direction X on the bearing surface 10 of the carrier 1.

[0064] Among them, the first transfer mechanism 8 can include a manipulator, etc., and transfers the solar cells 4 onto the carrier 1 by adsorption or other means.

[0065] In some embodiments, the carrier 1 is further configured to release the temporary fixation of the solar cells 4 when the welding of the solar cells 4 is completed. After the welding of the solar cells 4 is completed, the solar cells 4 need to be transported to the next process, so the carrier 1 releases the temporary fixation of the solar cells 4 to facilitate the transfer of the solar cells 4. The method of releasing the temporary fixation of the solar cells 4 includes, for example, releasing the negative pressure state at the vacuum suction holes.

[0066] The welding equipment further includes a second transfer mechanism 9, and the second transfer mechanism 9 is disposed close to the welding mechanism 2. The second transfer mechanism 9 is configured to transfer the solar cells 4 out of the carrier 1. After the carrier 1 releases the temporary fixation of the solar cells 4, the second transfer mechanism 9 transfers the solar cells 4 out of the carrier 1 and transfers them to the next process.

[0067] When the carrier 1 carries multiple solar cells 4, the second transfer mechanism 9 can transfer multiple solar cells 4 simultaneously. The second transfer mechanism 9 can include a manipulator or the like, and transfer the solar cells 4 out of the carrier 1 by adsorption or the like.

[0068] The carrier 1 is also configured to move back to the loading end 3 from the welding mechanism 2. After the second transfer mechanism 9 transfers the solar cells 4 out of the carrier 1, the carrier 1 moves back to the loading end 3 from the welding mechanism 2, so that after the carrier 1 continues to carry and temporarily fix the next group of solar cells 4, it drives the next group of solar cells 4 to move from the loading end 3 to the welding mechanism 2, enabling the welding structure 2 to weld the backlight surface of the next group of solar cells 4.

[0069] According to the welding equipment provided by the embodiments of the present application, by setting the carrier 1, the solar cells 4 are temporarily fixed on the carrier 1, the light-receiving surface of the solar cells 4 faces the carrier 1, there is no relative movement between the solar cells 4 and the carrier 1, the light-receiving surface of the solar cells 4 will not be damaged by the carrier 1, the backlight surface of the solar cells 4 faces away from the carrier 1, that is, the backlight surface of the solar cells 4 does not contact the carrier 1, so there is no need to perform solder drying treatment on the backlight surface of the solar cells 4, simplifying the process flow, reducing energy consumption, and reducing the risk of warping of the solar cells caused by high-temperature drying, thereby reducing the risk of fragmentation and the risk of insufficient lap area for subsequent lamination welding. Moreover, directly welding the backlight surface of the solar cells 4 without using a heat conduction welding method further reduces energy consumption and improves the welding effect, thus improving the reliability of the battery.

[0070] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and do not limit the number of objects. For example, the first object can be one or multiple.

[0071] In the description of the present application, "multiple" means two or more.

[0072] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A welding device, characterized in that: It includes the loading end, the carrier and the welding mechanism; The carrier is movably disposed between the loading end and the welding mechanism, and is configured to carry and temporarily fix the battery cell, and drive the battery cell to move from the loading end to the welding mechanism, with the light-receiving surface of the battery cell facing the carrier, and the backlight surface of the battery cell facing away from the carrier; The welding mechanism is configured to weld the backlight surface of the battery cell.

2. The welding device according to claim 1, characterized in that The carrier includes a carrying surface configured to carry a plurality of battery cells sequentially arranged along a moving direction of the carrier.

3. The welding device according to claim 2, characterized in that: The carrying surface has a vacuum suction hole configured to adsorb and fix the battery cell on the carrying surface.

4. The welding device according to claim 2, characterized in that: The bearing surface is a high temperature resistant surface.

5. The welding device according to claim 4, characterized in that The high temperature resistant surface includes at least one of an aluminum alloy surface and a stainless steel surface.

6. The welding device according to claim 2, characterized in that: The bearing surface is a smooth plane.

7. The welding device according to claim 1, characterized in that The welding equipment further comprises a linear module, which is fixedly connected to the carrier and configured to drive the carrier to move.

8. The welding device according to claim 1, characterized in that The backlight surface of the cell has a main grid line with opposite polarity, and the main grid line has undried solder; The welding equipment further includes a welding tape laying mechanism, which is arranged near the feeding end, or between the feeding end and the welding mechanism, or near the welding mechanism, and is configured to lay the welding tape on the backlight surface of the battery cell, and the welding tape covers the solder; The welding mechanism is also configured to fuse the welding ribbon with the solder so as to weld the welding ribbon to the backlight surface of the battery cell.

9. The welding device according to claim 1, characterized in that The welding equipment further includes a first transfer mechanism, which is disposed near the loading end and is configured to transfer the battery cell to the carrier.

10. The welding device according to any one of claims 1 to 9, characterized in that: The carrier is further configured to release the temporary fixation of the battery cell when the battery cell is welded; The welding device further includes a second transfer mechanism, which is disposed adjacent to the welding mechanism and is configured to transfer the battery cell out of the carrier; The vehicle is also configured to move from the welding mechanism back to the loading end.

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