Photovoltaic cell welding equipment

Abstract

The utility model discloses photovoltaic cell welding equipment, and belongs to the technical field of photovoltaic cell processing equipment. The photovoltaic cell welding equipment comprises a transmission component used for transmitting a cell piece; the feeding part is used for arranging a welding strip on the surface of the battery piece; the fixing part is used for fixing the relative positions of the welding strip and the battery piece, and a plurality of through holes are formed in the fixing part; and the laser welding part is used for emitting laser, and the laser penetrates through the through hole so that the welding strip can be welded to the surface of the battery piece.

Description

[0001] This application claims priority to Chinese Patent Application No. 202420288942.3, filed on February 7, 2024, entitled "A Photovoltaic Cell Welding Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of photovoltaic cell processing equipment technology, specifically to a photovoltaic cell welding equipment. Background Technology

[0003] A cell string is the core component of a photovoltaic module. A cell string consists of multiple solar cells spaced apart and connected in series by solder strips to form a cell string.

[0004] In related technologies, one end of a welding strip is welded to the surface of a battery cell by infrared heating welding, and the other end of the welding strip is welded to the surface of an adjacent battery cell, thereby connecting two adjacent battery cells together in series through the welding strip.

[0005] However, during infrared welding, the solder strip expands when heated and contracts upon cooling. The tension of the solder strip on the solar cell causes it to bend. Driven by the pursuit of cost reduction and efficiency improvement, the thickness of solar cells has been decreasing. These thinner cells cannot withstand the tension of the solder strip, leading to cell breakage. Utility Model Content

[0006] This utility model discloses a photovoltaic cell welding device to solve, or at least partially solve, the problem in the prior art where the cell is subjected to the tension of the welding strip, causing the cell to bend or even break.

[0007] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0008] This utility model discloses a photovoltaic cell welding device, which includes a transmission component for transmitting solar cells; a feeding component for placing welding strips on the surface of the solar cells; a fixing component for fixing the relative position of the welding strips and the solar cells, the fixing component having multiple through holes; and a laser welding component for emitting a laser, the laser passing through the through holes to weld the welding strips to the surface of the solar cells.

[0009] Optionally, along the first direction, the laser welding component and the transmission component are arranged at intervals relative to each other; the laser welding component includes a laser and a beam splitting optical component arranged at intervals, the laser is used to emit at least one laser beam, each of the at least one laser beam is split into multiple laser beams by the beam splitting optical component, and the multiple laser beams correspond one-to-one with the multiple through holes.

[0010] Optionally, the beam-splitting optical component includes a beam-shaping lens, a beam homogenizer, and an optical lens arranged sequentially.

[0011] Optionally, the conveying component includes a conveyor belt, and the fixing component is located on the conveyor belt, the conveyor belt being used to convey the fixing component.

[0012] Optionally, the fixing component includes a pressure plate and a pressing element connected to the end face of the pressure plate near the transmission component, the pressing element being used to fix the relative position of the solder strip and the battery cell.

[0013] Optionally, the pressing element includes a plurality of ejector pins, which are spaced apart and connected to the end face of the pressure plate near the transmission component. The ejector pins are used to press the solder strip onto the surface of the battery cell.

[0014] Optionally, the through hole includes a first through hole, and the first through hole includes a plurality of first through holes, which are spaced apart on the pressure plate.

[0015] Optionally, the fixing component further includes a perforated plate, wherein the perforated plate is spaced apart from the pressure plate along the first direction, and the perforated plate is disposed at the end of the pressure plate away from the ejector pin; the through hole further includes a second through hole, and the second through hole also includes a plurality of them, the plurality of second through holes being spaced apart on the perforated plate, and along the first direction, each second through hole is corresponding to one first through hole.

[0016] Optionally, when the fixing component includes a pressure plate, the pressure plate is made of ceramic material; when the fixing component includes a pressure plate and a perforated plate, the pressure plate is made of ceramic material or metal material.

[0017] Optionally, the feeding component includes: a tensioning mechanism for tensioning the welding strip; a gripping robot for gripping the welding strip and placing it on the surface of the battery cell; and a cutting mechanism for cutting the welding strip.

[0018] Optionally, the tensioning mechanism is located near one end of the transmission component, the gripping robot is movably connected to the transmission component, and the cutting mechanism is vertically connected to the transmission component.

[0019] Optionally, the gripping robot includes two, one gripping robot is movably connected to one side of the transmission component, and the other gripping robot is movably connected to the other side of the transmission component.

[0020] Optionally, the transmission component includes a conveyor belt, which may include one or more conveyor belts. In the case of multiple conveyor belts, the multiple conveyor belts are arranged in parallel.

[0021] Optionally, along the conveying direction of the conveyor belt, a plurality of air inlets are spaced apart on the conveyor belt, and the air inlets are connected to the air inlet box; the air inlets are used to fix the battery cells located on the conveyor belt to the conveyor belt.

[0022] Optionally, the plurality of through holes correspond to the plurality of welding areas of the battery cell, and the welding areas are solder joints.

[0023] This utility model discloses a photovoltaic cell welding device, which includes a transmission component for transmitting solar cells; a feeding component for placing welding strips on the surface of the solar cells; a fixing component for fixing the relative position of the welding strips and the solar cells, the fixing component having multiple through holes; and a laser welding component for emitting a laser, the laser passing through the through holes to weld the welding strips to the surface of the solar cells.

[0024] In this invention, the battery cells are transported by a conveying component, the welding ribbon is placed on the surface of the battery cells by a feeding component, and the relative positions of the welding ribbon and the battery cells are fixed by a fixing component. The laser emitted by the laser welding component can pass through a through-hole in the fixing component, welding the welding ribbon to the surface of the battery cells. Using this laser welding method, the welding ribbon is welded to the surface of the battery cells. The weld ribbon has a small heated area, and it is less prone to thermal expansion and contraction, thus avoiding the tensile force on the battery cells caused by the welding ribbon, which could lead to bending, deformation, or even breakage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the photovoltaic cell welding equipment described in the embodiments of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the feeding component described in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram showing the structure of the laser welding component described in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram showing the structure of the fixing component described in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram showing the structure of the laser welding component and the fixing component in another embodiment of the present invention;

[0030] Figure 6This is a schematic diagram of the structure of the fixing component described in another embodiment of the present invention;

[0031] Figure 7 This is a top view of the battery string described in an embodiment of the present invention;

[0032] Figure 8 This is a top view showing the welding point between the welding strip and the battery cell in an embodiment of the present invention.

[0033] Figure label:

[0034] 10: Transmission components;

[0035] 20: Feeding component; 21: Tensioning mechanism; 22: Gripping robot; 23: Cutting mechanism;

[0036] 30: Fixing component; 31: Pressure plate; 311: First through hole; 32: Ejector pin; 33: Perforated plate; 331: Second through hole;

[0037] 40: Laser welding component; 41: Laser; 42: Beam shaping lens; 43: Beam homogenizer; 44: Optical lens;

[0038] 50: Battery cell; 51: Solder joint;

[0039] 60: Welding strip;

[0040] A: First direction. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the fixed scope of the present utility model.

[0042] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0043] Reference Figure 1 A schematic diagram of the photovoltaic cell welding equipment described in an embodiment of this utility model is shown; refer to Figure 2 The diagram shows a structural schematic of the feeding component described in an embodiment of the present invention; refer to Figure 3 A schematic diagram of the structure of the laser welding component described in an embodiment of this utility model is shown; refer to Figure 4 A schematic diagram of the fixing component described in an embodiment of this utility model is shown; refer to Figure 5 This diagram illustrates the structure of the laser welding component and the fixing component according to another embodiment of the present invention; see reference. Figure 6 A schematic diagram of the fixing component described in another embodiment of the present invention is shown; see reference Figure 7 The diagram shows a top view of the battery string described in an embodiment of the present invention; see reference to... Figure 8 The image shows a top view of the welding point between the welding strip and the battery cell in an embodiment of this utility model.

[0044] like Figures 1 to 6 As shown in the figure, this utility model discloses a photovoltaic cell welding device, which includes a transmission component 10 for transmitting a cell 50; a feeding component 20 for placing a welding ribbon 60 on the surface of the cell 50; a fixing component 30 for fixing the relative position of the welding ribbon 60 and the cell 50, and the fixing component 30 is provided with a plurality of through holes; and a laser welding component 40 for emitting a laser, the laser passing through the through holes to weld the welding ribbon 60 to the surface of the cell 50.

[0045] like Figure 7 As shown, the battery string includes at least two battery cells 50 arranged at intervals. One end of the solder ribbon 60 is soldered to the surface of one battery cell 50, and the other end of the solder ribbon 60 is soldered to the surface of another adjacent battery cell 50, thereby connecting two adjacent battery cells 50 together in series through the solder ribbon 60 to form a battery string.

[0046] This utility model discloses a photovoltaic cell welding device. The device welds a welding strip 60 to the surface of the cell 50. The welding strip 60 has a small heating area and is not prone to thermal expansion and contraction. This avoids the cell 50 being subjected to the tension of the welding strip 60, which could cause the cell 50 to bend, deform, or even be damaged.

[0047] like Figures 1 to 6 As shown, the photovoltaic cell welding equipment disclosed in this embodiment of the present invention includes a transmission component 10, a feeding component 20, a fixing component 30, and a laser welding component 40. The solar cell 50 is placed on the transmission component 10 for transmission via the transmission component 10.

[0048] Specifically, the transmission component 10 may include a frame, a conveyor belt wound around the frame, and a drive unit connected to the conveyor belt. The battery cell 50 is placed on the conveyor belt, and the drive unit drives the conveyor belt to rotate around the frame, thereby transmitting the battery cell 50 to a preset position.

[0049] It should be noted that the preset position in this embodiment of the present invention is a position preset by a technician. This position can be close to the feeding component 20, or it can be a position opposite to the laser welding component 40 along the first direction A. In this embodiment of the present invention, the preset position is not limited; in actual applications, technicians can set the preset position as needed.

[0050] like Figures 1 to 6 As shown, the feeding component 20 is located at one end of the conveying component 10. When the solar cell 50 is conveyed to a position close to the feeding component 20, the feeding component 20 can place the solder ribbon 60 on the surface of the solar cell 50.

[0051] like Figures 1 to 6 As shown, after the solder ribbon 60 is placed on the surface of the battery cell 50, the relative positions of the battery cell 50 and the solder ribbon 60 are fixed by the fixing component 30. Specifically, the fixing component 30 can be placed on the end face of the solder ribbon 60 away from the battery cell 50, and the solder ribbon 60 is pressed onto the surface of the battery cell 50 by the fixing component 30, thereby fixing the relative positions of the battery cell 50 and the solder ribbon 60.

[0052] like Figure 7 and Figure 8 As shown, solder joints 51 are provided on the surface of the battery cell 50. The solder joints 51 are irradiated by the laser welding component 40 along a direction perpendicular to the plane of the battery cell 50, so that the solder strip 60 can be welded to the surface of the battery cell 50.

[0053] Specifically, the fixing component 30 can be provided with multiple through holes, which are spaced apart. When the fixing component 30 is pressed against the end face of the solder ribbon 60 away from the solar cell 50, each through hole, a portion of the solder ribbon 60, and a solder joint 51 are positioned opposite each other in a direction perpendicular to the plane of the solar cell 50. The laser welding component 40 emits a laser that can pass through the through holes and irradiate the solder ribbon 60 to weld the solder ribbon 60 to the corresponding solder joint 51, thereby welding the solder ribbon 60 to the surface of the solar cell 50.

[0054] In this embodiment of the invention, the battery cell 50 is transported by the transmission component 10, the welding ribbon 60 is placed on the surface of the battery cell 50 by the feeding component 20, and the relative position of the welding ribbon 60 and the battery cell 50 is fixed by the fixing component 30. The laser emitted by the laser welding component 40 can pass through the through hole on the fixing component 30, and the welding ribbon 60 is welded to the surface of the battery cell 50 by the laser. By using the above-mentioned laser welding method to weld the welding ribbon 60 to the surface of the battery cell 50, the welding ribbon 60 has a small heated area and is less prone to thermal expansion and contraction. This avoids the battery cell 50 being subjected to the tensile force of the welding ribbon 60, which could cause the battery cell 50 to bend, deform, or even break.

[0055] Optionally, such as Figure 1 , Figure 3 and Figure 5 As shown in this embodiment of the present invention, along the first direction A, the laser welding component 40 and the transmission component 10 are arranged at intervals relative to each other; the laser welding component 40 includes a laser 41 and a beam splitting optical component arranged at intervals, the laser 41 is used to emit at least one laser beam, each of the at least one laser beam is split into multiple laser beams by the beam splitting optical component, and the multiple laser beams correspond one-to-one with the multiple through holes.

[0056] like Figure 1 , Figure 3 and Figure 5 As shown in this embodiment of the invention, the laser welding component 40 and the transmission component 10 are arranged opposite to each other along the first direction A, that is, along the transmission direction perpendicular to the conveyor belt. It can be understood that the laser welding component 40 is positioned above or below the conveyor belt. Thus, the laser emitted by the laser welding component 40 can irradiate the battery cell 50 and the welding ribbon 60 located on the conveyor belt, thereby welding the welding ribbon 60 to the surface of the battery cell 50.

[0057] like Figure 1 , Figure 3 and Figure 5 As shown, the laser welding component 40 in this embodiment of the present invention includes a laser 41 and a beam-splitting optical component arranged at intervals. Specifically, the laser 41 and the beam-splitting optical component are arranged at intervals along a first direction A. The laser 41 can emit at least one laser beam, and each laser beam emitted by the laser 41 can irradiate the beam-splitting optical component. The beam-splitting optical component shapes each laser beam, splitting it into multiple laser beams, each corresponding to a multiple through-hole. Each laser beam passes through the corresponding through-hole and irradiates the corresponding welding point 51, thereby welding the solder ribbon 60 to the corresponding welding point 51, thus welding the solder ribbon 60 to the surface of the battery cell 50.

[0058] Specifically, the beam-splitting optical component includes a beam-shaping lens 42, a light-diffusing plate 43, and an optical lens 44 arranged sequentially. The laser 41, beam-shaping lens 42, light-diffusing plate 43, and optical lens 44 are arranged at intervals along a first direction A. Each laser beam emitted by the laser 41 can illuminate the beam-shaping lens 42, which shapes each laser beam, splitting it into multiple beams that correspond one-to-one with multiple through-holes. Each shaped laser beam can then illuminate the light-diffusing plate 43, which converts each laser beam into a light spot of a preset shape and uniform intensity. The size of the light spot is adapted to the size of the solder joint 51. Next, the light spot illuminates the optical lens 44, which further adjusts the light spot so that it passes through the corresponding through-hole and illuminates the solder joint 51, thereby welding the solder ribbon 60 to the solder joint 51 and thus welding the solder ribbon 60 to the surface of the solar cell 50.

[0059] It should be noted that, as Figure 8 As shown, to avoid the light spot burning the surface of the solar cell 50, the light spot irradiation area is located within the solder joint 51. The area of ​​the light spot irradiation area occupies 10% to 75% of the area of ​​the solder joint 51. For example, the area of ​​the light spot irradiation area occupies 10%, 20%, 30%, 40%, 50%, 60%, 75%, etc., of the area of ​​the solder joint 51. Preferably, the area of ​​the light spot irradiation area occupies 65% of the area of ​​the solder joint 51.

[0060] Furthermore, in this embodiment of the invention, no specific limitations are imposed on the shape of the solder joint 51 or the shape of the light spot irradiation area. In practical applications, technicians can make settings as needed.

[0061] For example, the shape of the solder joint 51 can be a triangle, a square, a rectangle, a circle, etc. The shape of the light spot irradiation area can also be a triangle, a square, a rectangle, a circle, etc. The shape of the light spot irradiation area and the shape of the solder joint 51 can be the same or different.

[0062] Optionally, such as Figures 1 to 6 As shown, the transmission component 10 in this embodiment of the present invention includes a conveyor belt, and the fixing component 30 is located on the conveyor belt. The conveyor belt is used to transport the fixing component 30.

[0063] like Figures 1 to 6 As shown in this embodiment of the invention, after the solder ribbon 60 is placed on the surface of the battery cell 50, the battery cell 50 and the solder ribbon 60 are located on the conveyor belt. Then, the fixing member 30 is pressed onto the end face of the solder ribbon 60 away from the battery cell 50, thereby pressing the solder ribbon 60 onto the surface of the battery cell 50. In other words, the fixing member 30 can fix the relative position of the battery cell 50 and the solder ribbon 60.

[0064] It is understandable that during the process of welding the welding strip 60 to the surface of the battery cell 50, the battery cell 50, the welding strip 60 and the fixing component 30 are all located on the conveyor belt, and the conveyor belt simultaneously transports the battery cell 50, the welding strip 60 and the fixing component 30.

[0065] Optionally, such as Figures 3 to 4 As shown, the fixing component 30 in this embodiment of the present invention includes a pressure plate 31 and a pressing element connected to the end face of the pressure plate 31 near the transmission component 10. The pressing element is used to fix the relative position of the welding strip 60 and the battery cell 50.

[0066] like Figures 3 to 4 As shown, the fixing component 30 in this embodiment of the present invention includes a pressure plate 31 and a pressing element connected to the end face of the pressure plate 31 near the transmission component 10. The pressure plate 31 fixes the pressing element and can block the heat emitted by the laser, preventing heat from being conducted to the battery cell 50. The pressing element also fixes the relative position of the welding ribbon 60 and the battery cell 50.

[0067] Specifically, the pressure plate 31 can be a ceramic plate, which has good heat insulation properties. A first through hole 311 is provided on the ceramic plate, through which a laser can pass and irradiate the solder ribbon 60 to weld the solder ribbon 60 to the solder joint 51 on the surface of the solar cell 50. Other areas of the ceramic plate, except for the first through hole 311, are not good conductors of heat, thus preventing heat transfer to the solar cell 50 and its impact.

[0068] Of course, the above-described embodiment of setting the pressure plate 31 as a ceramic plate is only one specific embodiment of this utility model and is not intended to limit the scope of this utility model. In practical applications, those skilled in the art can also use other materials with good heat insulation properties as the pressure plate 31.

[0069] It should be noted that, in this embodiment of the invention, the surface of the pressure plate 31 can be set to a matte finish. This reduces laser reflection and prevents the reflected laser from having a thermal impact on other components. Specifically, the surface of the pressure plate 31 can be set to a matte finish through mechanical grinding or chemical oxidation.

[0070] Specifically, such as Figure 3 and Figure 4 As shown, the pressing element in this embodiment of the present invention includes a push pin 32. There are multiple push pins 32, which are spaced apart and connected to the end face of the pressure plate 31 near the transmission component 10. The push pins 32 are used to press the welding strip 60 onto the surface of the battery cell 50.

[0071] like Figures 3 to 4As shown, in this embodiment of the present invention, the pressing element can be configured as a push pin 32, and multiple push pins 32 are arranged at intervals. One end of the push pin 32 is connected to the end face of the pressure plate 31 near the transmission component 10, and the other end of the push pin 32 is pressed onto the surface of the solder ribbon 60 away from the battery cell 50, so that the solder ribbon 60 can be pressed onto the surface of the battery cell 50 by multiple push pins 32.

[0072] For example, in this embodiment of the present invention, the pressing element can also be configured as a support rod, with one end of the support rod connected to the end face of the pressure plate 31 near the transmission component 10, and a groove provided on the other end of the support rod. The groove is engaged with the welding strip 60, and the other end of the support rod abuts against the surface of the battery cell 50, thereby pressing the welding strip 60 onto the surface of the battery cell 50.

[0073] Of course, the above are only individual embodiments of this utility model and are not intended to limit the utility model. In practical applications, technicians can also set the specific structure of the pressing element as needed so that the pressing element can fix the relative positions of the welding strip 60 and the battery cell 50.

[0074] It should be noted that the through hole in this embodiment of the present invention includes a first through hole 311, and there are multiple first through holes 311, which are spaced apart on the pressure plate 31.

[0075] In other words, the pressure plate 31 is provided with a plurality of first through holes 311, which are spaced apart. When the ejector pin 32 presses against the surface of the solder ribbon 60 away from the solar cell 50, each first through hole 311 is positioned opposite to a solder joint 51. This allows the laser to pass through the first through holes 311 and irradiate the solder ribbon 60 and the solder joint 51, thereby welding the solder ribbon 60 to the solar cell 50.

[0076] Optionally, such as Figure 5 and Figure 6 As shown, the fixing component 30 in this embodiment of the present invention also includes a perforated plate 33, wherein the perforated plate 33 and the pressure plate 31 are spaced apart along the first direction A, and the perforated plate 33 is disposed at the end of the pressure plate 31 away from the ejector pin 32; the through hole also includes a second through hole 331, and the second through hole 331 also includes a plurality of them, the plurality of second through holes 331 are spaced apart on the perforated plate 33, and along the first direction A, each second through hole 331 is correspondingly disposed with a first through hole 311.

[0077] like Figure 5 and Figure 6 As shown, along the first direction A, a perforated plate 33 is provided at the end of the pressure plate 31 away from the ejector pin 32, and the perforated plate 33 is spaced apart from the pressure plate 31. This is to further block the heat emitted by the laser through the perforated plate 33, preventing heat from being conducted to the solar cell 50.

[0078] Specifically, the perforated plate 33 is provided with a plurality of second through holes 331, which are spaced apart and arranged along the first direction A, with each second through hole 331 corresponding to a first through hole 311. This allows the laser emitted by the laser welding component 40 to pass through the second through holes 331 and the corresponding first through holes 311, irradiating the welding ribbon 60 and the welding point 51 to weld the welding ribbon 60 to the battery cell 50.

[0079] In this embodiment of the invention, the perforated plate 33 can be either a ceramic plate or a metal plate. When the perforated plate 33 is a ceramic plate, it can block most of the heat emitted by the laser, preventing heat from being conducted to the battery cell 50, thereby further improving the reliability of the connection between the solder ribbon 60 and the battery cell 50. When the perforated plate 33 is a metal plate, the metal plate has good thermal conductivity and can absorb most of the heat emitted by the laser. Furthermore, the metal plate is spaced apart from the pressure plate 31, so the heat absorbed by the metal plate will not be conducted to the pressure plate 31, and therefore will not be conducted to the battery cell 50, further improving the reliability of the connection between the solder ribbon 60 and the battery cell 50.

[0080] It should be noted that when the fixing component 30 only includes the pressure plate 31, the pressure plate 31 needs to be made of a material with good heat insulation properties, such as ceramic, to block the heat emitted by the laser and prevent excessive heat transfer to the solar cell 50, thus avoiding any impact on the solar cell 50. When the fixing component 30 includes both the pressure plate 31 and the perforated plate 33, the perforated plate 33 already blocks most of the heat emitted by the laser. Therefore, the pressure plate 31 can be made of a material with good heat insulation properties, such as ceramic. The pressure plate 31 can also be made of other materials. In this case, there are no restrictions on the specific material of the pressure plate 31.

[0081] It should be noted that, in this embodiment of the invention, the surface of the perforated plate 33 can be set to a matte finish. This reduces laser reflection and prevents the reflected laser from having a thermal impact on other components. Specifically, the surface of the perforated plate 33 can be set to a matte finish through mechanical grinding or chemical oxidation.

[0082] Optionally, such as Figure 1 and Figure 2 As shown, the feeding component 20 in this embodiment of the present invention includes: a tensioning mechanism 21, which is used to tension the welding strip 60; a gripping robot 22, which is used to grip the welding strip 60 and place the welding strip 60 on the surface of the battery cell 50; and a cutting mechanism 23, which is used to cut the welding strip 60.

[0083] like Figure 1 and Figure 2As shown, the feeding component 20 in this embodiment of the present invention includes a tensioning mechanism 21, a gripping robot 22, and a cutting mechanism 23. The tensioning mechanism 21 is located near one end of the transmission component 10, and the tensioning mechanism 21 can tension the welding strip 60 to prevent the welding strip 60 from scattering.

[0084] The gripping robot 22 is movably connected to the transmission component 10 to grip the welding ribbon 60 and place it on the surface of the battery cell 50. Exemplarily, the gripping robot 22 is vertically connected to the transmission component 10, and can descend to a position close to the welding ribbon 60 to grip and place it on the surface of the battery cell 50.

[0085] It should be noted that, in this embodiment of the utility model, there is no limitation on the specific way in which the gripping robot 22 is connected to the transmission component 10. In actual applications, technicians can choose a suitable connection method as needed.

[0086] In this embodiment of the invention, the cutting mechanism 23 is vertically connected to the transmission component 10. After the welding ribbon 60 is placed on the surface of the battery cell 50, the cutting mechanism 23 descends to a position close to the welding ribbon 60 to cut the welding ribbon 60. The welding ribbon 60 can be placed on the surface of the battery cell 50 through the aforementioned feeding component 20.

[0087] In this embodiment of the invention, to improve production efficiency and reduce waiting time during operation, two gripping robots 22 can be configured. One gripping robot 22 is movably connected to one side of the transmission component 10 to grip one end of the welding strip 60 and place that end on the surface of the battery cell 50. The other gripping robot 22 is movably connected to the other side of the transmission component 10 to grip the other end of the welding strip 60 and place that end on the surface of an adjacent battery cell 50. By having the two gripping robots 22 alternately grip the welding strip 60, production efficiency can be improved and waiting time during operation can be reduced.

[0088] Optionally, such as Figure 1 and Figure 2 As shown, the transmission component 10 in this embodiment of the present invention includes a conveyor belt, which may include one or more conveyor belts. In the case of multiple conveyor belts, the multiple conveyor belts are arranged in parallel.

[0089] like Figure 1 and Figure 2As shown, the transmission component 10 in this embodiment of the present invention includes a frame, a conveyor belt, and a drive unit. The conveyor belt is wound around the frame, and the drive unit is connected to the conveyor belt. The drive unit drives the conveyor belt to rotate around the frame. Thus, the conveyor belt can transport the battery cells 50 located thereon.

[0090] It should be noted that in this embodiment of the invention, there may be one conveyor belt, which is wound around the frame. Alternatively, there may be multiple conveyor belts, arranged in parallel and all wound around the frame. For example, there may be two conveyor belts, arranged in parallel with a gap between them, and both wound around the frame.

[0091] Optionally, multiple air inlets are spaced apart along the conveyor belt in the conveying direction. The air inlets are connected to the air inlet box and are used to fix the battery cells 50 located on the conveyor belt to the conveyor belt.

[0092] In this embodiment of the invention, multiple air intakes are spaced apart along the conveyor belt's transport direction and connected to an air intake box. When the battery cell 50 is placed on the conveyor belt, the air intake box draws air, thereby fixing the battery cell 50 to the conveyor belt and preventing it from moving on the conveyor belt.

[0093] Optionally, the plurality of through holes correspond to a plurality of welding areas of the battery cell 50, and the welding area is a solder joint 51.

[0094] In this embodiment of the invention, the multiple through holes on the fixing component 30 correspond one-to-one with the multiple welding areas on the battery cell 50, so that the laser can pass through each through hole and irradiate the corresponding welding area, thereby welding the solder strip 60 to the corresponding welding area. The welding area is the solder point 51 in the above embodiment, which will not be described again here.

[0095] This utility model discloses a photovoltaic cell welding device, which includes a transmission component for transmitting solar cells; a feeding component for placing welding strips on the surface of the solar cells; a fixing component for fixing the relative position of the welding strips and the solar cells, the fixing component having multiple through holes; and a laser welding component for emitting a laser, the laser passing through the through holes to weld the welding strips to the surface of the solar cells.

[0096] In this embodiment of the invention, the battery cells are transported by a transmission component, the welding ribbon is placed on the surface of the battery cells by a feeding component, and the relative positions of the welding ribbon and the battery cells are fixed by a fixing component. The laser emitted by the laser welding component can pass through a through-hole in the fixing component, welding the welding ribbon to the surface of the battery cells. Using this laser welding method, the welding ribbon is welded to the surface of the battery cells. The weld ribbon has a small heated area, and it is less prone to thermal expansion and contraction, thus avoiding the battery cells being subjected to tensile force from the welding ribbon, which could lead to bending, deformation, or even breakage.

[0097] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0098] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0099] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0100] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A photovoltaic cell welding device, characterized in that, include: A transmission component (10) is used to transmit battery cells (50); A feeding component (20) is used to place the welding strip (60) on the surface of the battery cell (50); A fixing component (30) is used to fix the relative position of the welding strip (60) and the battery cell (50), and the fixing component (30) is provided with a plurality of through holes; A laser welding component (40) is used to emit a laser that passes through the through hole to weld the welding strip (60) to the surface of the battery cell (50).

2. The photovoltaic cell welding equipment according to claim 1, characterized in that, Along the first direction (A), the laser welding component (40) and the transmission component (10) are arranged at a distance from each other; The laser welding component (40) includes a laser (41) and a beam splitting optical component arranged at intervals. The laser (41) is used to emit at least one laser beam. Each of the at least one laser beam is split into multiple laser beams by the beam splitting optical component. The multiple laser beams correspond one-to-one with the multiple through holes.

3. The photovoltaic cell welding equipment according to claim 2, characterized in that, The beam-splitting optical component includes a beam-shaping lens (42), a light-diffusing plate (43), and an optical lens (44) arranged sequentially.

4. The photovoltaic cell welding equipment according to claim 1, characterized in that, The transmission component (10) includes a conveyor belt, and the fixing component (30) is located on the conveyor belt, which is used to transport the fixing component (30).

5. The photovoltaic cell welding equipment according to claim 4, characterized in that, The fixing component (30) includes a pressure plate (31) and a pressing element connected to the end face of the pressure plate (31) near the transmission component (10); The pressing element is used to fix the relative positions of the solder strip (60) and the battery cell (50).

6. The photovoltaic cell welding equipment according to claim 5, characterized in that, The pressing element includes ejector pins (32), and there are multiple ejector pins (32), which are spaced apart and all connected to the pressure plate (31); The ejector pin (32) is used to press the solder strip (60) onto the surface of the battery cell (50).

7. The photovoltaic cell welding equipment according to claim 6, characterized in that, The through hole includes a first through hole (311), and the first through hole (311) includes a plurality of first through holes (311), which are spaced apart on the pressure plate (31).

8. The photovoltaic cell welding equipment according to claim 7, characterized in that, The fixing component (30) further includes a perforated plate (33), wherein, Along the first direction (A), the perforated plate (33) and the pressure plate (31) are spaced apart, and the perforated plate (33) is located at the end of the pressure plate (31) away from the ejector pin (32); The through hole also includes a second through hole (331), and the second through hole (331) also includes a plurality of them. The plurality of second through holes (331) are spaced apart on the perforated plate (33), and along the first direction (A), each second through hole (331) is correspondingly provided with one first through hole (311).

9. The photovoltaic cell welding equipment according to claim 8, characterized in that, When the fixing component (30) includes a pressure plate (31), the pressure plate (31) is made of ceramic material; When the fixing component (30) includes a pressure plate (31) and a perforated plate (33), the pressure plate (31) is made of ceramic material or metal material.

10. The photovoltaic cell welding equipment according to claim 1, characterized in that, The feeding component (20) includes: Tensioning mechanism (21), said tensioning mechanism (21) is used to tension the welding strip (60); A gripping robot (22) is used to grip the welding strip (60) and place the welding strip (60) on the surface of the battery cell (50); A cutting mechanism (23) is used to cut the welding strip (60).

11. The photovoltaic cell welding equipment according to claim 10, characterized in that, The tensioning mechanism (21) is located near one end of the transmission component (10), the gripping robot (22) is movably connected to the transmission component (10), and the cutting mechanism (23) is vertically connected to the transmission component (10).

12. The photovoltaic cell welding equipment according to claim 10, characterized in that, The gripping manipulator (22) includes two, one of which is movably connected to one side of the transmission component (10), and the other is movably connected to the other side of the transmission component (10).

13. The photovoltaic cell welding equipment according to claim 1, characterized in that, The transmission component (10) includes a conveyor belt, which may include one or more conveyor belts. In the case where there are multiple conveyor belts, the multiple conveyor belts are arranged in parallel.

14. The photovoltaic cell welding equipment according to claim 13, characterized in that, Along the conveying direction of the conveyor belt, a plurality of air inlets are provided at intervals on the conveyor belt, and the air inlets are connected to the air inlet box; The air intake is used to fix the battery cell (50) located on the conveyor belt to the conveyor belt.

15. The photovoltaic cell welding equipment according to claim 1, characterized in that, The plurality of through holes correspond to the plurality of welding areas of the battery cell (50), and the welding areas are solder joints (51).

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