Battery piece string welding device and string welding method thereof

Abstract

The application discloses a battery piece string welding device and a string welding method thereof. A roller assembly of a rolling mechanism flattens a welding strip, a cutting assembly of a cutting mechanism cuts the welding strip, an X-axis driving part of a moving mechanism drives a Z-axis driving part to move towards the cutting assembly, a clamping assembly clamps the cut welding strip, then the X-axis driving part drives the Z-axis driving part to drive the clamping assembly to move reversely to a rotating disc, a first mechanical arm grabs the battery piece to a rotating arm assembly of the rotating disc, the Z-axis driving part drives the clamping assembly to move to the rotating disc along the Z-axis direction, the clamping assembly places the welding strip on the battery piece, a rotating table rotates the welding strip and the battery piece to a welding and rolling assembly, the welding and rolling assembly welds and rolls the welding strip to the battery piece, then the rotating table continues to rotate the battery piece to a second mechanical arm, the second mechanical arm clamps the battery piece to a conveying belt, and a plurality of welding units are sequentially arranged along the conveying belt, so that the battery pieces with the welded welding strips can be simultaneously placed on the conveying belt, and the stringing efficiency of the battery pieces is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of solar cell technology, and more specifically to cell stringing equipment and stringing methods. Background Technology

[0002] Traditional solar cell modules are formed by connecting several individual solar cells in series using solder ribbons to create strings. These strings are then arranged in a specific array, connected in series using solder ribbons, and encapsulated to form the solar cell module. Existing cell stringing equipment requires picking up each cell and solder ribbon individually and placing them onto a conveyor belt to arrange the cells sequentially before soldering the ribbons onto them. This results in poor production line flexibility and very low efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a battery cell stringing equipment and method, which enables multiple battery cells with welded strips to be placed simultaneously on a conveyor belt, greatly improving the stringing efficiency of battery cells.

[0004] To solve the above problems, the technical solution provided by the present invention is as follows: a battery cell string welding device, comprising a conveyor belt and multiple welding units arranged sequentially along the conveyor belt conveying direction. Each welding unit includes a rolling mechanism, a cutting mechanism, a moving mechanism, a welding pressing mechanism, a turntable, a first manipulator, and a second manipulator. The rolling mechanism includes a first frame, a first drive component, and a roller assembly. The roller assembly is mounted on the first frame, and the first drive component drives the roller assembly to rotate. The roller assembly is used to roll the welding strip. The cutting mechanism includes a second frame, a second drive component, and a cutting assembly. The two ends of the cutting assembly are respectively mounted on both sides of the second frame, and the second drive component drives the cutting assembly to cut the welding strip. The moving mechanism includes a third frame, an X-axis drive component, a Z-axis drive component, and a clamping assembly. The X-axis drive component is mounted on the third frame, and the X-axis drive component... A moving component drives a Z-axis drive component to move along the X-axis. The Z-axis drive component drives a clamping assembly to move along the Z-axis. The clamping assembly is used to clamp the welding strip. The welding pressing mechanism includes a fourth frame, a third drive component, and a welding pressing component. The third drive component is mounted on the fourth frame, and its output end is connected to the welding pressing component. The welding pressing component is used to weld the welding strip onto the battery cell. The turntable includes a turntable, a fourth drive component, and multiple rotating arm assemblies. The multiple rotating arm assemblies are arranged circumferentially along the turntable. The first robot arm picks up the battery cell onto the turntable, and the second robot arm picks up the welded battery cell and welding strip onto the conveyor belt. The welding unit includes a fifth frame, a fifth drive component, and a welding assembly. The fifth drive component is mounted on the fifth frame, and its output end is connected to the welding assembly. The welding assembly is used to weld the welding strip on the battery cell onto the next adjacent battery cell.

[0005] Optionally, the roller assembly includes a first roller and a second roller, both of which are movably mounted on a first frame. The first roller is provided with a first pressure block, and the second roller is provided with a second pressure block. There is a first gap between the first pressure block and the second pressure block for the welding strip to pass through. At an elevation angle, the projection surface of the second pressure block in the vertical direction partially overlaps with the first pressure block. The second roller is connected to an adjusting member, which drives the second roller to rotate around its axis, thereby changing the length of the second pressure block in contact with the welding strip.

[0006] Optionally, the first pressing block is arranged around the outer peripheral wall of the first roller, and the second pressing block is arranged around the outer peripheral wall of the second roller. The longitudinal section of the first pressing block and the longitudinal section of the second pressing block are both arc-shaped. The adjusting member drives the second roller to rotate around the axis. The arc center angle of the first pressing block is 120~200°, and the arc center angle of the second pressing block is 120~200°.

[0007] Optionally, the cutting assembly includes a guide plate and a cutting plate. The two ends of the guide plate are respectively installed on the two sides of the second frame. The guide plate is provided with a plurality of guide grooves at intervals along the length direction. The second driving member is installed on the top of the second frame. One side of the cutting plate is connected to the output end of the second driving member, and the other side of the cutting plate is provided with a cutting blade.

[0008] Optionally, the clamping assembly includes a sixth driving member, a first connecting plate, a second connecting plate, and a plurality of grippers. The first connecting plate is connected to the Z-axis driving member and the second connecting plate respectively. The plurality of grippers are spaced apart along the length direction of the second connecting plate, and one end of the gripper moves against the second connecting plate, while the other end of the gripper passes through the first connecting plate and is connected to the sixth driving member.

[0009] Optionally, the gripper includes a first link and a second link. One end of the first link is connected to a sixth driving member, and the other end of the first link is rotatably connected to the second link. A protrusion rotatably connected to a second connecting plate is provided between the two ends of the second link. A clamping plate is provided at the end of the second link away from the first link, and the clamping plate movably abuts against the second connecting plate.

[0010] Optionally, the rotating arm assembly includes a rotating arm, an air pump, and multiple suction cups. The rotating arm is provided with multiple first through holes at intervals, and each suction cup is installed in a corresponding first through hole. Each suction cup is provided with a suction hole for adsorbing the battery cell onto the rotating arm. The suction hole is connected to the air pump. Each suction cup includes a first suction part and a second suction part. The first suction part is located in the first through hole and is provided with the suction hole through the first suction part. The second suction part is circumferentially extended outward along the end of the first suction part and is made of a soft material.

[0011] Optionally, the first through hole includes a first channel and a second channel communicating with the first channel, the diameter of the first channel being larger than the diameter of the second channel, and the first suction part includes a limiting part and a plug-in part connected to the limiting part, the limiting part being located in the first channel, the plug-in part being located in the second channel, and the diameter of the limiting part being larger than the diameter of the second channel.

[0012] Optionally, the welding assembly includes a blowing assembly, a heating assembly, and a pressing assembly arranged sequentially from top to bottom. The blowing assembly includes a first support chamber and a fan disposed within the first support chamber. The heating assembly includes a second support chamber and an infrared lamp disposed within the second support chamber. The pressing assembly includes a third support chamber and multiple pressing wires disposed at the bottom of the third support chamber. The first, second, and third support chambers are sequentially connected. The output end of the third driving component is connected to the first, second, or third support chamber. The first, second, and third support chambers are connected by a connecting rod, facilitating the third driving component to drive the welding pressing component to lift and lower as a whole.

[0013] This invention also discloses a method for stringing solar cells, comprising the following steps:

[0014] (1) Multiple welding units are arranged sequentially along the conveyor belt conveying direction;

[0015] (2) The rolling mechanism of each welding unit flattens the welding strip, the cutting mechanism cuts the welding strip, the X-axis drive of the moving mechanism drives the Z-axis drive to approach the cutting component, the clamping component clamps the cut welding strip, and then the X-axis drive drives the Z-axis drive to move the clamping component in the opposite direction to the turntable. The first robot grabs the battery cell to the rotating arm component of the turntable, the Z-axis drive drives the clamping component to move along the Z-axis direction to the turntable, the clamping component places the welding strip on the battery cell, the turntable rotates the welding strip and battery cell to the welding pressing mechanism, the welding pressing component welds the welding strip onto the battery cell, the turntable continues to rotate the battery cell to the second robot, the second robot clamps the battery cell onto the conveyor belt;

[0016] (3) The welding components of the welding unit weld the solder strips on the battery cell to the next adjacent battery cell to form a battery string. Beneficial effects

[0017] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0018] (1) The battery cell stringing equipment proposed in this application involves the roller assembly of the rolling mechanism flattening the welding strip, the cutting assembly of the cutting mechanism cutting the welding strip, the X-axis drive of the moving mechanism driving the Z-axis drive to move closer to the cutting assembly, so that the clamping assembly clamps the cut welding strip, and then the X-axis drive driving the Z-axis drive to move the clamping assembly in the opposite direction to the turntable. The first robot grabs the battery cell to the rotating arm assembly of the turntable, and the Z-axis drive drives the clamping assembly to move along the Z-axis direction to the turntable, so that the clamping assembly places the welding strip on the battery cell. The turntable rotates the welding strip and the battery cell to the welding pressing mechanism, and the welding pressing component welds the welding strip onto the battery cell. Then the turntable continues to rotate the battery cell to the second robot, and the second robot clamps the battery cell onto the conveyor belt. Multiple welding units are arranged sequentially along the conveyor belt, which can realize that multiple battery cells with welded welding strips can be placed on the conveyor belt at the same time, and then the welding strips on the battery cells are welded to adjacent battery cells to form a battery string, which greatly improves the stringing efficiency of the battery cells.

[0019] (2) In the battery cell stringing equipment proposed in this application, the first pressure block and the second pressure block squeeze the welding strip entering the first gap. When the adjusting component drives the second roller to rotate around the axis, the length of the second pressure block contacting the welding strip changes, thereby changing the length of the welding strip being squeezed and realizing that the area of ​​the welding strip being squeezed is adjustable. The adjusting component can be a handwheel or a handle, which makes it convenient for the user to hold the adjusting component to rotate the second roller around the axis.

[0020] (3) In the battery cell stringing equipment proposed in this application, when the battery cell approaches the rotating arm, the vacuum pump starts to draw air and adsorbs the battery cell onto the rotating arm through the suction hole, increasing the firmness of the battery cell on the rotating arm and preventing the battery cell from being thrown off the rotating arm during rotation. The second suction part is made of soft material. After the vacuum pump draws air into the second suction part to create a vacuum, it will deform, causing the trumpet-shaped outer edge to come close to the rotating arm, thereby making the battery cell adhere to the rotating arm and ensuring the flatness of the battery cell surface.

[0021] (4) In the battery cell stringing equipment proposed in this application embodiment, one end of the infrared lamp is installed on the inner side of one side wall of the second support chamber, and the other end of the infrared lamp is installed on the inner side of the other side wall of the second support chamber. During operation, the pressure wire presses the welding strip, and the infrared lamp heats the welding strip so that the welding strip adheres to the battery cell. When the infrared lamp is heating, the fan blows air onto the infrared lamp so that the welding strip is heated evenly. The diameter of the pressure wire is much smaller than the width of the pressure plate, which reduces the shadow area caused to the welding strip and better ensures the uniformity of the infrared lamp irradiation on the battery cell, thereby improving the welding quality of the welding strip and the battery cell. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the battery cell stringing equipment proposed in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the rolling assembly proposed in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the first and second rollers of the rolling assembly proposed in an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the cutting component proposed in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the moving mechanism proposed in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the gripper structure of the moving mechanism proposed in an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the welding and pressing mechanism proposed in an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the structure of the turntable proposed in an embodiment of the present invention.

[0030] Figure 9 for Figure 8 A magnified view of A in the middle.

[0031] Figure 10 This is a schematic diagram of the suction cup structure proposed in an embodiment of the present invention.

[0032] Figure 11 This is a schematic diagram of the welding unit proposed in an embodiment of the present invention.

[0033] Figure 12 This is a bottom view of the wire pressing mechanism of the welding unit proposed in an embodiment of the present invention.

[0034] The labels in the attached figures are as follows: 1. Rolling mechanism; 11. First frame; 12. First drive component; 13. First roller; 131. First pressure block; 14. Second roller; 141. Second pressure block; 15. First gear; 16. Second gear; 2. Cutting mechanism; 21. Second frame; 22. Second drive component; 23. Thread guide plate; 231. Thread guide groove; 24. Thread cutting plate; 241. Blade; 3. Moving mechanism; 31. Third frame; 32. X-axis drive component; 33. Z-axis drive component; 34. First connecting plate; 35. Second connecting plate; 36. Gripper; 361. First connecting rod; 362. Second connecting rod; 3621. Clamping plate; 3621. Protrusion; 3622. Clamping plate; 363. Rotating shaft; 4. Welding and pressing mechanism; 41. Fourth frame; 42. Third drive unit; 43. Welding and pressing component; 5. Turntable; 51. Turntable; 52. Rotary arm; 521. First through hole; 53. Suction cup; 531. First suction part; 5311. Limiting part; 5312. Insertion part; 532. Second suction part; 533. Suction hole; 6. First robotic arm; 7. Second robotic arm; 8. Welding unit; 81. Fifth frame; 82. Blowing assembly; 821. First support chamber; 822. Fan; 83. Heating assembly; 831. Second support chamber; 832. Infrared lamp tube; 84. Pressing assembly; 841. Third support chamber; 842. Wire pressing; 9. Conveyor belt. Detailed Implementation

[0035] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0036] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are for the convenience of describing the technical solutions of the invention and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of the invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this invention. Example

[0037] Combined with appendix Figure 1-12The battery cell stringing equipment of this embodiment includes a conveyor belt 9 and multiple welding units 8 arranged sequentially along the conveying direction of the conveyor belt 9. Each welding unit 8 includes a rolling mechanism 1, a cutting mechanism 2, a moving mechanism 3, a welding pressing mechanism 4, a turntable 5, a first robotic arm 6, and a second robotic arm 7. The rolling mechanism 1 includes a first frame 11, a first drive component 12, and a roller assembly. The roller assembly is mounted on the first frame 11, and the first drive component 12 drives the roller assembly to rotate. The roller assembly is used to roll the welding strip. The cutting mechanism 2 includes a second frame 21, a second drive component 22, and a cutting assembly. The two ends of the cutting assembly are respectively mounted on both sides of the second frame 21, and the second drive component 22 drives the cutting assembly to cut the welding strip. The moving mechanism 3 includes a third frame 31, an X-axis drive component 32, a Z-axis drive component 33, and a clamping assembly. The X-axis drive component 32 is mounted on the third frame 31, and the X-axis drive component 33 drives the welding strip to rotate. The Z-axis drive 33 moves along the X-axis, and the Z-axis drive 33 drives the clamping assembly to move along the Z-axis. The clamping assembly is used to clamp the welding strip. The welding pressing mechanism 4 includes a fourth frame 41, a third drive 42, and a welding pressing component 43. The third drive is mounted on the fourth frame 41, and the output end of the third drive is connected to the welding pressing component. The welding pressing component 43 is used to weld the welding strip onto the battery cell. The turntable 5 includes a turntable 51, a fourth drive, and multiple rotating arm assemblies 52. The multiple rotating arm assemblies 52 are arranged circumferentially along the turntable 51. The first robotic arm 6 picks up the battery cell onto the turntable 5, and the second robotic arm 7 picks up the welded battery cell and welding strip onto the conveyor belt 9. The welding unit 8 includes a fifth frame 81, a fifth drive, and a welding assembly. The fifth drive is mounted on the fifth frame 81, and the output end of the fifth drive is connected to the welding assembly. The welding assembly is used to weld the welding strip on the battery cell onto the next adjacent battery cell.

[0038] The roller assembly of the rolling mechanism 1 flattens the welding strip, the cutting assembly of the cutting mechanism 2 cuts the welding strip, and the X-axis drive 32 of the moving mechanism 3 drives the Z-axis drive 33 to move closer to the cutting assembly, so that the clamping assembly picks up the cut welding strip. Then, the X-axis drive 32 drives the Z-axis drive 33 to move the clamping assembly in the opposite direction to the turntable 5. The first robotic arm 6 grabs the battery cell onto the rotating arm 52 assembly of the turntable 5, and the Z-axis drive 33 drives the clamping assembly to move along the Z-axis direction to the turntable 5, so that the clamping assembly... The welding ribbon is placed onto the battery cell. Turntable 51 rotates the welding ribbon and battery cell to welding pressing mechanism 4. The welding pressing component welds the welding ribbon onto the battery cell. Then, turntable 51 continues to rotate the battery cell to the second robotic arm 7, which clamps the battery cell onto conveyor belt 9. Multiple welding units 8 are sequentially arranged along conveyor belt 9, allowing multiple battery cells with welded ribbons to be placed on conveyor belt 9 simultaneously. The welding ribbons on the battery cells are then welded to adjacent battery cells to form a battery string, greatly improving the stringing efficiency of the battery cells. The first drive component 12, second drive component 22, third drive component 42, and fourth drive component can be motors, cylinders, or hydraulic cylinders. The X-axis drive component 32 and Z-axis drive component 33 can be stepper motors or servo motors. The welding pressing component 43 can be a soldering iron or an electric heating plate. Example

[0039] Combined with appendix Figure 1-12 Compared with the technical solution of Embodiment 1, the battery cell string welding equipment of this embodiment can be improved as follows: The roller assembly includes a first roller 13 and a second roller 14. The first roller 13 and the second roller 14 are both movably mounted on the first frame 11. The first roller 13 is provided with a first pressure block 131, and the second roller 14 is provided with a second pressure block 141. There is a first gap between the first pressure block 131 and the second pressure block 141 for the welding strip to pass through. At the elevation angle, the projection surface of the second pressure block 141 in the vertical direction partially overlaps with the first pressure block 131. The second roller 14 is connected to an adjusting member. The adjusting member drives the second roller 14 to rotate around the axis, so that the length of the second pressure block 141 in contact with the welding strip changes.

[0040] The first pressure block 131 and the second pressure block 141 compress the welding strip entering the first gap. When the adjusting component drives the second roller 14 to rotate around the axis, the length of the second pressure block 141 in contact with the welding strip changes, thus changing the length of the welding strip being compressed and making the area of ​​the welding strip being compressed adjustable. The adjusting component can be a handwheel or a handle, making it convenient for the user to hold the adjusting component to rotate the second roller 14 around the axis. The first frame 11 is provided with a first through hole 521 and a second through hole. The first roller 13 passes through the first through hole 521 and is connected to a first gear 15. The second roller 14 passes through the second through hole and is connected to a second gear 16. The second gear 16 meshes with the first gear 15 and the first driving component 12 respectively. The first driving component 12 drives the second gear 16 to rotate, and the second gear 16 drives the first gear 15 to rotate synchronously. When the user manually rotates the adjusting component to make the second roller 14 rotate around its axis, the first gear 15 needs to be separated from the first roller 13 firstly. The outer circumference of the first roller 13 is provided with a locking protrusion, and the first gear 15 is provided with a locking groove that engages with the locking protrusion, so that the first roller 13 and the first gear 15 can be detachably connected. This avoids the second roller 14 affecting the first roller 13 during its movement. The second roller 14 and the second gear 16 can also be detachably connected. After the length of the second pressure block 141 in contact with the welding strip is adjusted, the first gear 15 is then remounted on the first roller 13, so that the first gear 15 and the second gear 16 mesh. In other embodiments, the adjusting member can drive the second roller 14 to move axially, the second pressure block 141 is distributed at intervals along the axial direction of the second roller 14, the transverse cross section of the second pressure block 141 is wavy, the adjusting member drives the second roller 14 to move axially, the first pressure block 131 is arranged around the outer peripheral wall of the first roller 13, and the longitudinal cross section of the first pressure block 131 is arc-shaped, and the arc center angle of the first pressure block 131 is 120~360°. Example

[0041] Combined with appendix Figure 1-12Compared with the technical solutions of Embodiments 1 or 2, the battery cell stringing equipment of this embodiment can be improved as follows: the first pressure block 131 is arranged around the outer peripheral wall of the first roller 13, and the second pressure block 141 is arranged around the outer peripheral wall of the second roller 14. The longitudinal cross-section of the first pressure block 131 and the longitudinal cross-section of the second pressure block 141 are both arc-shaped. The adjusting member drives the second roller 14 to rotate around the axis. The arc center angle of the first pressure block 131 is 120~200°, and the arc center angle of the second pressure block 141 is 120~200°. In this embodiment, the longitudinal cross-section refers to the cross-section of the first pressure block 131 and the second pressure block 141 in the vertical direction. When the adjusting member drives the second roller 14 to rotate around the axis, the length of overlap between the projection surface of the second pressure block 141 in the vertical direction and the first pressure block 131 changes, thereby realizing the adjustable area of ​​the welding strip being squeezed. In this embodiment, the central arc angle of the first pressing block 131 and the central arc angle of the second pressing block 141 are both 180°. In other embodiments, the central arc angle of the first pressing block 131 and the central arc angle of the second pressing block 141 can be 120°, 150°, or 200°. Example

[0042] Combined with appendix Figure 1-12 Compared with any one of the technical solutions in embodiments 1-3, the battery cell stringing equipment of this embodiment can be improved as follows: The cutting component includes a wire-fixing plate 23 and a wire-cutting plate 24. The two ends of the wire-fixing plate 23 are respectively installed on both sides of the second frame 21. The wire-fixing plate 23 is provided with a plurality of wire-fixing grooves 231 at intervals along its length. The second driving member 22 is installed on the top of the second frame 21. One side of the wire-cutting plate 24 is connected to the output end of the second driving member 22, and the other side of the wire-cutting plate 24 is provided with a blade 241. The welding strip is passed through the wire-fixing groove 231 for easy positioning of the welding strip. The second driving member 22 drives the wire-cutting plate 24 to move toward the wire-fixing plate 23, so that the blade 241 on the wire-cutting plate 24 cuts the welding strip. Example

[0043] Combined with appendix Figure 1-12Compared with any of the technical solutions in embodiments 1-4, the battery cell string welding equipment of this embodiment can be improved as follows: The clamping assembly includes a sixth driving member, a first connecting plate 34, a second connecting plate 35, and a plurality of grippers 36. The first connecting plate 34 is connected to the Z-axis driving member 33 and the second connecting plate 35 respectively. The plurality of grippers 36 are spaced apart along the length direction of the second connecting plate 35, and one end of the gripper 36 moves against the second connecting plate 35, while the other end of the gripper 36 passes through the first connecting plate 34 and is connected to the sixth driving member. When the Z-axis driving member 33 drives the clamping assembly to approach the cutting mechanism through the first connecting plate 34, the sixth driving member drives the grippers 36 to abut against the second connecting plate, and the grippers 36 clamp the welding strip; when the Z-axis driving member 33 drives the clamping assembly to approach the turntable 5 through the first connecting plate 34, the sixth driving member drives the grippers 36 to separate from the second connecting plate. Example

[0044] Combined with appendix Figure 1-12 Compared with any one of the technical solutions in embodiments 1-5, the battery cell stringing equipment of this embodiment can be improved as follows: The gripper 36 includes a first connecting rod 361 and a second connecting rod 362. One end of the first connecting rod 361 is connected to a sixth driving member, and the other end of the first connecting rod 361 is rotatably connected to the second connecting rod 362. A protrusion 3621 rotatably connected to a second connecting plate 35 is provided between the two ends of the second connecting rod 362. A clamping plate 3622 is provided at the end of the second connecting rod 362 away from the first connecting rod 361. The clamping plate 3622 movably abuts against the second connecting plate 35. The sixth driving member drives the second connecting plate to rotate through the first connecting rod 361, so that the clamping plate 3622 abuts against or separates from the second connecting plate 35. A rotating shaft 363 is provided between the protrusion 3621 and the second connecting plate 35, and the rotating shaft 363 passes through multiple protrusions 3621. Example

[0045] Combined with appendix Figure 1-12Compared with any one of the technical solutions in embodiments 1-6, the battery cell stringing equipment of this embodiment can be improved as follows: The rotating arm 52 assembly includes a rotating arm 52, an air pump, and a plurality of suction cups 53. The rotating arm 52 is provided with a plurality of first through holes 521 at intervals. Each suction cup 53 is installed in the first through hole 521 in a corresponding manner. The suction cup 53 is provided with suction holes 533 for adsorbing the battery cells onto the rotating arm 52. The suction holes 533 are connected to the air pump. The suction cup 53 includes a first suction part 531 and a second suction part 532. The first suction part 531 is located in the first through hole 521 and the first suction part 531 is provided through the suction hole 533. The second suction part 532 is circumferentially extended outward along the end of the first suction part 531. The second suction part 532 is made of a soft material. When the battery cell approaches the rotating arm 52, the vacuum pump starts to draw air, adsorbing the battery cell onto the rotating arm 52 through the suction hole 533. This increases the stability of the battery cell on the rotating arm 52 and prevents it from flying off during rotation. The second suction part 532 is made of soft material. After the vacuum pump creates a vacuum in the second suction part 532, it deforms, causing its trumpet-shaped outer edge to come close to the rotating arm 52, thereby adhering the battery cell to the rotating arm 52 and ensuring the flatness of the battery cell surface. Example

[0046] Combined with appendix Figure 1-12 Compared with any one of the technical solutions in embodiments 1-7, the battery cell stringing equipment of this embodiment can be improved as follows: The first through hole 521 includes a first channel and a second channel communicating with the first channel. The diameter of the first channel is larger than the diameter of the second channel. The first suction part 531 includes a limiting part 5311 and a plug-in part 5312 connected to the limiting part 5311. The limiting part 5311 is located in the first channel, and the plug-in part 5312 is located in the second channel. The diameter of the limiting part 5311 is larger than the diameter of the second channel. The second channel limits the first suction part 531, preventing the first suction part 531 from falling out of the first through hole 521. Example

[0047] Combined with appendix Figure 1-12Compared with any one of the technical solutions in embodiments 1-8, the battery cell stringing equipment of this embodiment can be improved as follows: The welding assembly includes a blowing assembly 82, a heating assembly 83, and a pressing assembly 84 arranged sequentially from top to bottom. The blowing assembly 82 includes a first support chamber 821 and a fan 822 disposed in the first support chamber 821. The heating assembly 83 includes a second support chamber 831 and an infrared lamp 832 disposed in the second support chamber 831. The pressing assembly 84 includes a third support chamber 841 and multiple pressing wires 842 disposed at the bottom of the third support chamber 841. The first support chamber 821, the second support chamber 831, and the third support chamber 841 are connected in sequence. The output end of the third driving member 42 is connected to the first support chamber 821, the second support chamber 831, or the third support chamber 841. The first support chamber 821, the second support chamber 831, and the third support chamber 841 are connected by a connecting rod, which facilitates the third driving member 42 to drive the overall lifting and lowering of the welding pressing component. One end of the infrared lamp tube 832 is installed on the inner side of one side wall of the second support chamber 831, and the other end of the infrared lamp tube 832 is installed on the inner side of the other side wall of the second support chamber 831. During operation, the pressure wire 842 presses the welding strip, and the infrared lamp tube 832 heats the welding strip, causing the welding strip to adhere to the battery cell. While the infrared lamp tube 832 is heating, the fan 822 blows air onto the infrared lamp tube 832, so that the welding strip is heated evenly. The diameter of the pressure wire 842 is much smaller than the width of the pressure plate, which reduces the shadow area caused to the welding strip and better ensures the uniformity of the infrared lamp tube 832 irradiating the battery cell, thus improving the welding quality of the welding strip and the battery cell. Example

[0048] Combined with appendix Figure 1-12 The battery cell stringing method of this embodiment includes the following steps:

[0049] (1) Multiple welding units 8 are arranged sequentially along the conveyor belt 9;

[0050] (2) The rolling mechanism 1 of each welding unit 8 flattens the welding strip, the cutting mechanism 2 cuts the welding strip, the X-axis drive 32 of the moving mechanism 3 drives the Z-axis drive 33 to approach the cutting component, the clamping component clamps the cut welding strip, and then the X-axis drive 32 drives the Z-axis drive 33 to drive the clamping component to move in the opposite direction to the turntable 5. The first robot 6 grabs the battery cell to the rotating arm 52 component of the turntable 5, the Z-axis drive 33 drives the clamping component to move along the Z-axis direction to the turntable 5, the clamping component puts the welding strip on the battery cell, the turntable 51 rotates the welding strip and battery cell to the welding pressing mechanism 4, the welding pressing component welds the welding strip onto the battery cell, the turntable 51 continues to rotate the battery cell to the second robot 7, the second robot 7 clamps the battery cell onto the conveyor belt 9;

[0051] (3) The welding assembly of welding unit 8 welds the solder strips on the battery cell to the next adjacent battery cell to form a battery string.

[0052] Multiple welding units 8 are arranged sequentially along the conveyor belt 9, which allows multiple welded solar cells to be placed on the conveyor belt 9 at the same time, greatly improving the series connection efficiency of the solar cells.

[0053] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A battery cell stringing equipment, characterized in that, The system includes a conveyor belt and multiple welding units arranged sequentially along the conveyor belt's transport direction. Each welding unit includes a rolling mechanism, a cutting mechanism, a moving mechanism, a welding pressing mechanism, a turntable, a first robotic arm, and a second robotic arm. The rolling mechanism includes a first frame, a first drive member, and a roller assembly. The roller assembly is mounted on the first frame, and the first drive member drives the roller assembly to rotate. The roller assembly is used to roll the welding strip. The cutting mechanism includes a second frame, a second drive unit, and a cutting assembly. The two ends of the cutting assembly are respectively installed on the two sides of the second frame, and the second drive unit drives the cutting assembly to cut the welding strip. The moving mechanism includes a third frame, an X-axis drive, a Z-axis drive, and a clamping assembly. The X-axis drive is mounted on the third frame and drives the Z-axis drive to move along the X-axis. The Z-axis drive drives the clamping assembly to move along the Z-axis. The clamping assembly is used to clamp the welding strip. The welding pressing mechanism includes a fourth frame, a third drive component, and a welding pressing component. The third drive component is mounted on the fourth frame, and the output end of the third drive component is connected to the welding pressing component. The welding pressing component is used to weld the welding strip onto the battery cell. The turntable includes a turntable, a fourth drive component, and multiple rotating arm assemblies, which are arranged circumferentially along the turntable. The first robotic arm picks up the battery cells and places them on the turntable, while the second robotic arm picks up the welded battery cells and welding strips and places them on the conveyor belt. The welding unit includes a fifth frame, a fifth drive unit, and a welding assembly. The fifth drive unit is mounted on the fifth frame, and its output end is connected to the welding assembly. The welding assembly is used to weld the solder strips on the battery cell to the next adjacent battery cell.

2. The battery cell stringing equipment according to claim 1, characterized in that, The roller assembly includes a first roller and a second roller, both of which are movably mounted on a first frame. The first roller is provided with a first pressure block, and the second roller is provided with a second pressure block. There is a first gap between the first pressure block and the second pressure block for the welding strip to pass through. At an elevation angle, the projection surface of the second pressure block in the vertical direction partially overlaps with the first pressure block. The second roller is connected to an adjusting member, which drives the second roller to rotate around its axis, thereby changing the length of the second pressure block in contact with the welding strip.

3. The battery cell stringing equipment according to claim 2, characterized in that, The first pressing block is arranged around the outer peripheral wall of the first roller, and the second pressing block is arranged around the outer peripheral wall of the second roller. The longitudinal cross-section of the first pressing block and the longitudinal cross-section of the second pressing block are both arc-shaped. The adjusting member drives the second roller to rotate around the axis. The arc center angle of the first pressing block is 120~200°, and the arc center angle of the second pressing block is 120~200°.

4. The battery cell stringing equipment according to claim 1, characterized in that, The cutting assembly includes a guide plate and a cutting plate. The two ends of the guide plate are respectively installed on the two sides of the second frame. The guide plate has multiple guide grooves spaced apart along its length. The second drive unit is installed on the top of the second frame. One side of the cutting plate is connected to the output end of the second drive unit, and the other side of the cutting plate has a cutting blade.

5. The battery cell stringing equipment according to claim 1, characterized in that, The clamping assembly includes a sixth driving member, a first connecting plate, a second connecting plate, and multiple grippers. The first connecting plate is connected to the Z-axis driving member and the second connecting plate respectively. The multiple grippers are spaced apart along the length direction of the second connecting plate, with one end of the gripper movably abutting against the second connecting plate and the other end of the gripper passing through the first connecting plate and connecting to the sixth driving member.

6. The battery cell stringing equipment according to claim 5, characterized in that, The gripper includes a first link and a second link. One end of the first link is connected to a sixth driving member, and the other end of the first link is rotatably connected to the second link. A protrusion rotatably connected to a second connecting plate is provided between the two ends of the second link. A clamping plate is provided at the end of the second link away from the first link, and the clamping plate movably abuts against the second connecting plate.

7. The battery cell stringing equipment according to claim 1, characterized in that, The rotating arm assembly includes a rotating arm, an air pump, and multiple suction cups. The rotating arm is provided with multiple first through holes at intervals, and each suction cup is installed in a corresponding first through hole. Each suction cup is provided with a suction hole for adsorbing the battery cell onto the rotating arm. The suction hole is connected to the air pump. Each suction cup includes a first suction part and a second suction part. The first suction part is located in the first through hole and is provided with the suction hole through it. The second suction part is circumferentially extended outward along the end of the first suction part. The second suction part is made of a soft material.

8. The battery cell stringing equipment according to claim 7, characterized in that, The first through hole includes a first channel and a second channel communicating with the first channel. The diameter of the first channel is larger than the diameter of the second channel. The first suction part includes a limiting part and a plug-in part connected to the limiting part. The limiting part is located in the first channel, and the plug-in part is located in the second channel. The diameter of the limiting part is larger than the diameter of the second channel.

9. The battery cell stringing equipment according to claim 1, characterized in that, The welding assembly includes a blowing assembly, a heating assembly, and a pressing assembly arranged sequentially from top to bottom. The blowing assembly includes a first support chamber and a fan disposed within the first support chamber. The heating assembly includes a second support chamber and an infrared lamp disposed within the second support chamber. The pressing assembly includes a third support chamber and multiple pressing wires disposed at the bottom of the third support chamber. The first, second, and third support chambers are connected in sequence. The output end of the third driving component is connected to the first, second, or third support chamber. The first, second, and third support chambers are connected by a connecting rod, which facilitates the third driving component to drive the welding pressing component to lift and lower as a whole.

10. A method for stringing solar cells, applied to the solar cell stringing equipment as described in any one of claims 1 to 9, characterized in that, Includes the following steps: (1) Multiple welding units are arranged sequentially along the conveyor belt conveying direction; (2) The rolling mechanism of each welding unit flattens the welding strip, the cutting mechanism cuts the welding strip, the X-axis drive of the moving mechanism drives the Z-axis drive to approach the cutting component, the clamping component clamps the cut welding strip, and then the X-axis drive drives the Z-axis drive to move the clamping component in the opposite direction to the turntable. The first robot grabs the battery cell to the rotating arm component of the turntable, the Z-axis drive drives the clamping component to move along the Z-axis direction to the turntable, the clamping component places the welding strip on the battery cell, the turntable rotates the welding strip and battery cell to the welding pressing mechanism, the welding pressing component welds the welding strip onto the battery cell, the turntable continues to rotate the battery cell to the second robot, the second robot clamps the battery cell onto the conveyor belt; (3) The welding components of the welding unit weld the solder strips on the battery cell to the next adjacent battery cell to form a battery string.

Images