Solar cell passivation coating device

Abstract

The invention discloses a solar cell passivating and coating device, and belongs to the technical field of solar cell passivating and coating, the solar cell passivating and coating device comprises a rack and two conveyors mounted on the rack, a rotating seat is assembled in the middle of the rack, the rotating seat comprises a passivating nozzle, and an exhaust unit is assembled in the rotating seat; through the arranged suction cup piece, after the to-be-processed segmented battery piece is received, adsorbed and fixed by the vacuum suction cup, the rotating base can drive the vacuum suction cup to revolve, and meanwhile in the rotating process, after an outer tooth ring on a rotating connector makes contact with one toothed piece every time, the vacuum suction cup can drive the battery piece on the outer tooth ring to rotate by 90 degrees; according to the invention, different tangent planes of the battery piece are rotated to face the passivation spray head, so that even if multiple tangent planes exist, passivation coating treatment can be performed by the passivation spray head in the rotating process, and meanwhile, the tangent planes of the battery piece are not required to be opposite to the passivation spray head during entering, so that the complexity and difficulty of operation are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell passivation coating, and in particular to a solar cell passivation coating device. Background Art

[0002] Passivation coating refers to the formation of a dense, stable oxide layer or composite film layer on the surface of solar cells to reduce surface defects, reduce surface recombination rate, improve the corrosion resistance and electrochemical stability of the battery, thereby improving the photoelectric conversion efficiency and service life of solar cells. At the same time, after the solar cells are divided, the cut surface of the sliced ​​cells also needs to be passivated.

[0003] China Patent Network discloses a solar cell passivation coating device, with publication number CN118136738B, comprising a housing and a rotating system rotating in the housing, wherein the rotating system comprises a rotating platform; the cell is detachably fixed on the rotating platform, and the rotating platform drives the cell to rotate. The present invention mainly has the following beneficial effects: the rotating platform rotates with the stacked cells, and under the action of centrifugal force, the passivation material entering the gap between two adjacent cells can be thrown out of the gap, effectively avoiding the accumulation of the passivation material between the gaps of adjacent cells.

[0004] When used in practice, this application can effectively passivate the cut surfaces of the split battery cells, but its limitation is that it only supports the operation of the cut surfaces of the battery cells that have been split once. This means that when the battery cell is split multiple times and multiple cut surfaces are generated, it is impossible to passivate coat all the cut surfaces. In addition, to ensure the coating effect, the cut surface of the battery cell must be precisely aligned with the passivation nozzle, which requires that the position of the battery cell must be precisely adjusted during the process of being transported to the rotating platform, which undoubtedly increases the complexity and difficulty of the operation. Summary of the invention

[0005] The purpose of the present invention is to propose a solar cell passivation coating device in order to solve the problem that when a solar cell is divided multiple times to generate multiple cut surfaces, it is impossible to perform passivation coating on all the cut surfaces.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a solar cell passivation coating device, comprising a frame and two conveyors installed on the frame, a rotating seat is installed in the middle of the frame, the rotating seat comprises a passivation nozzle, an exhaust unit is installed in the rotating seat, a plurality of suction cups are installed on the rotating seat, and the suction cups are connected to a negative pressure unit through a three-way solenoid valve at the end;

[0007] The suction cup member includes a vacuum suction cup, the bottom of the vacuum suction cup is fixedly connected to a rotary joint, the three-way solenoid valve is mounted on the fixed end of the rotary joint, the bottom fixed sleeve of the outer surface of the rotating end of the rotary joint is provided with an external gear ring, and at least four electric push rods are mounted on the exhaust unit, and one end of the electric push rod is equipped with a toothed member for driving the external gear ring to rotate 90°;

[0008] The rotating seat drives the battery cell that has slid from one of the conveyors to the surface of the vacuum suction cup and is adsorbed and fixed to revolve. During the rotation process, under the action of the toothed parts at different positions, the unpassivated cross-section of the battery cell driven by the vacuum suction cup can rotate to the position corresponding to the passivation nozzle.

[0009] As a further description of the above technical solution:

[0010] The suction cup component also includes a push block, and a mounting groove corresponding to the push block is opened on one side of the upper surface of the vacuum suction cup. The push block is rotatably connected in the mounting groove. Magnets are fixed on the lower surface of the push block and the upper surface of the mounting groove, and the magnetic poles of the contact surfaces of the two magnets are opposite.

[0011] As a further description of the above technical solution:

[0012] The rotating seat also includes a base plate, a fixed base is mounted on the base plate, a mounting platform is rotatably connected inside the fixed base, an inner gear ring is fixed to the bottom of the inner wall of the mounting platform, a gear meshing with the inner gear ring is rotatably connected to one side of the inner bottom wall of the fixed base, a motor is mounted on the lower surface of the base plate, and an output end of the motor is spline-connected to one end of the gear.

[0013] As a further description of the above technical solution:

[0014] A top cover is fixed at the edge of the mounting platform, the passivation nozzle is fixed on the inner wall of the top cover, a feed guide is fixed at the inlet of the top cover, one end of the feed guide is in contact with one of the conveyors, and a discharge guide is fixed at the outlet of the top cover, one end of the discharge guide is in contact with the other conveyor.

[0015] As a further description of the above technical solution:

[0016] A fixed limit rod extending from the vacuum suction cup is fixed on one side of the feed guide platform, and a connecting seat is fixed on the other side of the feed guide platform, and a dynamic limit rod extending from the vacuum suction cup is rotatably connected to the connecting seat.

[0017] As a further description of the above technical solution:

[0018] The mounting platform is provided with a mounting hole corresponding to the rotary joint, the rotary joint is inserted into the mounting hole, the outer surface of the rotary end of the rotary joint is fixedly sleeved with a damping pad adapted to the inner cavity of the mounting hole, the outer wall of the damping pad is in contact with the inner wall of the mounting hole, so that the rotary end of the rotary joint remains in a fixed position after rotation;

[0019] A guide seat for driving the push block to tilt upward is fixed on one side of the mounting platform close to the top cover outlet.

[0020] As a further description of the above technical solution:

[0021] The negative pressure unit includes a vacuum pump fixed on the inner top wall of the mounting platform, an exhaust ring pipe is fixed on the inner wall of the mounting platform, an exhaust main pipe is fixed on the air inlet end of the vacuum pump, one end of the exhaust main pipe is fixedly connected to the exhaust ring pipe, a plurality of exhaust sub-pipes are fixedly connected to the exhaust ring pipe, and one end of the exhaust sub-pipe is fixed to one end of the three-way solenoid valve.

[0022] As a further description of the above technical solution:

[0023] The negative pressure unit also includes an air pump, which is fixed on the inner top wall of the mounting platform. An air supply ring pipe is fixed to the inner wall of the mounting platform near the bottom of the air extraction ring pipe. An air supply main pipe is fixed to the output end of the air pump. One end of the air supply main pipe is fixedly connected to the air supply ring pipe. A plurality of air supply sub-pipes are fixedly connected to the air supply ring pipe. One end of the air supply sub-pipe is fixed to the other end of the three-way solenoid valve.

[0024] As a further description of the above technical solution:

[0025] The exhaust unit includes a middle tube, a through hole matching the middle tube is opened in the middle of the mounting platform, the middle tube is inserted into the through hole, one end of the middle tube that penetrates into the mounting platform is fixed to the inner bottom wall of the fixing seat, and the electric push rod is fixed to the inner wall of the middle tube;

[0026] A guide seat is fixed on one side of the middle tube near the top cover outlet for driving the push block to tilt upward, and a plurality of spherical bumps are fixed on the edge of the upper surface of the middle tube for driving the side of the vacuum suction cup near the passivation nozzle to tilt downward.

[0027] As a further description of the above technical solution:

[0028] The top end of the middle tube is fixedly connected to an extension cover, a plurality of air inlet holes are opened on the outer wall of the extension cover, an exhaust fan is mounted on the inner bottom wall of the fixed seat, an exhaust pipe is fixed to the input end of the exhaust fan, and the top end of the exhaust pipe is inserted into the extension cover.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] By setting the suction cup part, after the split battery slice to be processed is received and fixed by the vacuum suction cup, the rotating seat can drive the vacuum suction cup to revolve. At the same time, during the rotation process, after the outer tooth ring on the rotary joint contacts a toothed part each time, the vacuum suction cup can drive the battery slice on it to rotate 90 degrees, so that different sections of the battery slice are rotated to face the passivation nozzle, so that even if there are multiple sections, they can be passivated by the passivation nozzle during the rotation process. At the same time, it is not necessary to ensure that the section of the battery slice must be opposite to the passivation nozzle when entering, which reduces the complexity and difficulty of the operation;

[0031] After the different cut surfaces are rotated to face the passivation nozzle, and then continue to rotate until they are aligned with the passivation nozzle, the vacuum suction cup is gradually pushed by the spherical bump until the cut surface tilts downward toward the side of the passivation nozzle, thereby preventing the material from entering the gap between the battery cells as much as possible when the cut surface is passivated and coated. Even if some of the material enters the gap, the centrifugal force during the rotation process can make it easier to throw the material out of the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It shows a schematic diagram of a structure provided in a three-dimensional manner according to an embodiment of the present invention;

[0033] Figure 2 It shows a schematic diagram of the internal structure of the cut-away rotating seat according to an embodiment of the present invention;

[0034] Figure 3 It shows a schematic diagram of the internal structure of a top cover after being cut open according to an embodiment of the present invention;

[0035] Figure 4 It shows a schematic structural diagram of a swivel seat provided in an embodiment of the present invention after being disassembled and viewed from above;

[0036] Figure 5 The embodiment of the present invention provides Figure 3 The enlarged structural diagram at A in the middle;

[0037] Figure 6 A schematic structural diagram of a negative pressure unit provided according to an embodiment of the present invention is shown;

[0038] Figure 7 The embodiment of the present invention provides Figure 6 The enlarged structural diagram at B in the middle;

[0039] Figure 8 A schematic diagram of a planar structure provided according to an embodiment of the present invention is shown;

[0040] Fig. 9 A schematic diagram of a top view of the structure of a cut-away fixing base according to an embodiment of the present invention is shown;

[0041] Fig.10 It shows a schematic diagram of the internal structure of the exhaust unit after being cut open according to an embodiment of the present invention;

[0042] Fig.11 A schematic diagram of the structure of a vacuum suction cup tilted after rotating at different angles according to an embodiment of the present invention is shown;

[0043] Fig.12 The embodiment provided according to the present invention shows Fig.11 The enlarged structural diagram at C in the middle;

[0044] Fig.13 A schematic diagram of the internal structure of a cutaway retaining tube according to an embodiment of the present invention is shown.

[0045] Legend:

[0046] 10. Rack;

[0047] 20. Conveyor;

[0048] 30. Rotating seat; 31. Bottom plate; 32. Fixed seat; 33. Mounting platform; 34. Internal gear ring; 35. Gear; 36. Motor; 37. Top cover; 38. Passivation nozzle; 39. Feeding guide platform; 310. Fixed limit rod; 311. Moving limit rod; 312. Discharging guide platform;

[0049] 40. Suction cup; 41. Vacuum suction cup; 42. Rotary joint; 43. External gear ring; 44. Electric push rod; 45. Toothed part; 46. Three-way solenoid valve; 47. Push block; 48. Magnet; 49. Damping pad; 410. Guide seat; 411. Spherical bump; 412. Holding tube; 413. Suspension rod;

[0050] 50. Negative pressure unit; 51. Vacuum pump; 52. Air pump; 53. Air extraction ring pipe; 54. Air delivery ring pipe;

[0051] 60. Exhaust unit; 61. Middle tube; 62. Exhaust fan; 63. Extended cover. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] like Figure 1 - Fig.13 As shown, the present invention provides:

[0054] A solar cell passivation coating device comprises a frame 10 and two conveyors 20 mounted on the frame 10, a rotating seat 30 is mounted in the middle of the frame 10, an exhaust unit 60 is mounted in the rotating seat 30, a plurality of suction cups 40 are mounted on the rotating seat 30, and the suction cups 40 are connected to a negative pressure unit 50 through a three-way solenoid valve 46 at the end;

[0055] like Figure 2 , Figure 3 and Figure 4 As shown, the rotating seat 30 includes a passivation nozzle 38 and a bottom plate 31, a fixed seat 32 is mounted on the bottom plate 31, a mounting platform 33 is rotatably connected inside the fixed seat 32, an inner gear ring 34 is fixed to the bottom of the inner wall of the mounting platform 33, a gear 35 meshing with the inner gear ring 34 is rotatably connected to one side of the inner bottom wall of the fixed seat 32, a motor 36 is mounted on the lower surface of the bottom plate 31, an output end of the motor 36 is spline-connected to one end of the gear 35, after the motor 36 is started, its output end drives the gear 35 to rotate, and then drives the inner gear ring 34 to drive the mounting platform 33 to rotate, so that the vacuum suction cup 41 mounted on the mounting platform 33 rotates with it;

[0056] A top cover 37 is fixed at the edge of the mounting platform 33. Cameras are installed on the upper part of the outer wall of the top cover 37 near the inlet and on its inner top wall for observing the transmitted battery cells, recording and feeding back the number and position of the cross-sections of the battery cells. A passivation nozzle 38 is fixed on the inner wall of the top cover 37. The passivation nozzle 38 is connected to an external liquid supply element. The specific structure, principle and use method of the passivation nozzle 38 are well-known technologies and are not described in detail here. A feed guide 39 is fixed at the inlet of the top cover 37. One end of the feed guide 39 is in contact with one of the conveyors 20. A discharge guide 312 is fixed at the outlet of the top cover 37. One end of the discharge guide 312 is in contact with another conveyor 20.

[0057] Specifically, the conveyor 20 located on the inlet side of the top cover 37 is higher than the suction cup member 40, the feed guide 39 is inclined, and the lowest point is flush with the surface of the vacuum suction cup 41. At the same time, the conveyor 20 located on the outlet side of the top cover 37 is lower than the suction cup member 40, and the discharge guide 312 is inclined, and the lowest point is flush with the surface of the conveyor 20, so that when feeding, the battery cells can slide down to the surface of the vacuum suction cup 41 through the feed guide 39, and when discharging, the battery cells can slide down to the surface of the conveyor 20 on the outlet side through the discharge guide 312.

[0058] like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Fig.10 As shown, the suction cup member 40 includes a vacuum suction cup 41, the bottom of the vacuum suction cup 41 is fixedly connected with a rotary joint 42, a three-way solenoid valve 46 is assembled on the fixed end of the rotary joint 42, and the bottom fixed sleeve of the outer surface of the rotating end of the rotary joint 42 is provided with an outer gear ring 43, and the exhaust unit 60 is equipped with at least four electric push rods 44, one end of the electric push rod 44 is equipped with a toothed member 45 for driving the outer gear ring 43 to rotate 90 degrees, and a plurality of spherical protrusions 411 for driving the vacuum suction cup 41 close to the passivation nozzle 38 to tilt downward are fixed on the edge of the upper surface of the middle tube 61, and the vacuum suction cup 41 is at a certain distance from the surface of the mounting platform 33, so that the vacuum suction cup 41 can be tilted at an angle under the action of the spherical protrusions 411 after rotating 90 degrees, and after tilting, the bottom of its downward end face is against the surface of the mounting platform 33, and at the same time, in order to cooperate with the spherical protrusions 411, the four sides of the lower surface of the vacuum suction cup 41 are arc-shaped.

[0059] The rotating seat 30 drives the battery cell that has slid from one of the conveyors 20 to the surface of the vacuum suction cup 41 and is fixed by adsorption to revolve. During the rotation process, under the action of the toothed members 45 at different positions, the unpassivated section of the battery cell driven by the vacuum suction cup 41 can rotate to a position corresponding to the passivation nozzle 38;

[0060] A fixed limit rod 310 extending from the vacuum suction cup 41 is fixed to one side of the feed guide 39, and a connecting seat is fixed to the other side of the feed guide 39, and a movable limit rod 311 extending from the vacuum suction cup 41 is rotatably connected to the connecting seat, and the lower surfaces of the fixed limit rod 310 and the movable limit rod 311 are both on the same horizontal line with the upper surface of the vacuum suction cup 41, so that during the sliding process, the fixed limit rod 310 and the movable limit rod 311 can limit the position of the battery cell so that it will not deviate, and the deadweight of the movable limit rod 311 can resist the sliding battery cell, and the battery cell will not drive the movable limit rod 311 to tilt when colliding with the movable limit rod 311, thereby preventing it from deviating, and a protective pad is provided at the bottom end of the movable limit rod 311;

[0061] During feeding, when the battery cell slides toward the vacuum suction cup 41 through the feeding guide 39, during the sliding process, the fixed limit rod 310 and the dynamic limit rod 311 limit the position of the battery cell to avoid deviation. After the vacuum suction cup 41 adsorbs and fixes the battery cell, the vacuum suction cup 41 rotates with the mounting table 33. During rotation, since the position of the battery cell is fixed, the end of the battery cell can push the dynamic limit rod 311 to rotate during the rotation. During this process, the protective pad protects the edge of the battery cell to avoid damage due to the state of abutting contact. After the battery cell pushes the dynamic limit rod 311 to rotate upward, the battery cell can smoothly rotate with the vacuum suction cup 41. When it rotates to be opposite to the first passivation nozzle 38, the cross section of the battery cell is passivated and coated, and the new vacuum suction cup 41 rotates to the bottom of the feeding guide 39 to receive the next battery cell.

[0062] Specifically, according to the number and position of the cut surfaces of the battery cell, the toothed part 45 is driven by the electric push rod 44 to remain in place or retract inward, so that during the rotation process, the vacuum suction cup 41 can be rotated 90° under the action of the toothed part 45 at different positions, so that the battery cells to be passivated with 1-4 cut surfaces can rotate the unpassivated cut surfaces to the position corresponding to the passivation nozzle 38 during the rotation process, thereby completing the passivation coating operation of all cut surfaces while the vacuum suction cup 41 rotates 180° along with the mounting table 33.

[0063] like Figure 2 , Figure 3 and Fig.10 As shown, the exhaust unit 60 includes a middle tube 61, a through hole matching the middle tube 61 is opened in the middle of the mounting platform 33, the middle tube 61 is inserted into the through hole, one end of the middle tube 61 that penetrates into the mounting platform 33 is fixed to the inner bottom wall of the fixing seat 32, and the electric push rod 44 is fixed to the inner wall of the middle tube 61;

[0064] The top of the middle tube 61 is fixedly connected to a protruding cover 63, and a plurality of air inlet holes are provided on the outer wall of the protruding cover 63. An exhaust fan 62 is mounted on the inner bottom wall of the fixed seat 32. An exhaust pipe is fixed to the input end of the exhaust fan 62. The top of the exhaust pipe is plugged into the protruding cover 63. A hole for exhaust is provided on the inner bottom wall of the fixed seat 32, so that the air extracted by the exhaust fan 62 can be discharged outward through the hole.

[0065] During the coating process, the air in the top cover 37 is discharged to the outside in real time by starting the exhaust fan 62, so as to avoid the gas existing before and after the passivation coating to affect the ongoing passivation coating operation.

[0066] like Figure 2 and Figure 6As shown, a mounting hole corresponding to the rotary joint 42 is provided on the mounting platform 33, and the rotary joint 42 is inserted into the mounting hole. A damping pad 49 adapted to the inner cavity of the mounting hole is fixedly sleeved on the outer surface of the rotating end of the rotary joint 42. The outer wall of the damping pad 49 contacts the inner wall of the mounting hole, so that the rotating end of the rotary joint 42 remains in a fixed position after rotation. It is worth noting that the friction between the damping pad 49 and the mounting hole can enable the rotating end of the rotary joint 42 to drive the vacuum suction cup 41 to maintain its position after rotation, and it has a certain toughness, so that the vacuum suction cup 41 and the rotary joint 42 can be tilted as a whole, and can withstand the resistance brought by pushing the movable limit rod 311 to rotate, and will not cause a certain deflection due to pushing the movable limit rod 311 to rotate;

[0067] Two holding tubes 412 are fixed to the fixed end of the rotary joint 42, and the holding tube 412 is connected to an extension rod through a spring. An axle rod is fixed to one end of the extension rod, and the extension rod is rotatably connected to a hanging rod 413 through the axle rod. The top ends of the two hanging rods 413 are fixed to the lower surface of the mounting platform 33, so that the fixed end position of the rotary joint 42 is fixed. The axle rod is equipped with a torsion spring for driving the extension rod to self-reset to a horizontal state after following the tilt of the rotary joint 42. When the spherical protrusion 411 drives the vacuum suction cup 41 to tilt, while continuing to rotate, the torsion spring drives the extension rod together with the holding tube 412 to return to a horizontal state, thereby causing the rotary joint 42 to drive the vacuum suction cup 41 to return to a horizontal state, and then return to a horizontal state before contacting the next toothed member 45, thereby ensuring that the outer tooth ring 43 and the toothed member 45 are normally meshed and tilted at an angle.

[0068] like Figure 2 , Figure 6 and Fig. 9 As shown, the negative pressure unit 50 includes a vacuum pump 51 fixed on the inner top wall of the mounting platform 33, an exhaust ring pipe 53 is fixed on the inner wall of the mounting platform 33, an exhaust main pipe is fixed on the air inlet end of the vacuum pump 51, one end of the exhaust main pipe is fixedly connected to the exhaust ring pipe 53, and the exhaust ring pipe 53 is fixedly connected to multiple exhaust sub-pipes, one end of the exhaust sub-pipe is fixed to one end of the three-way solenoid valve 46;

[0069] When the battery cell to be processed slides to the surface of the vacuum suction cup 41, the three-way solenoid valve 46 is controlled to connect the rotary joint 42 with the exhaust auxiliary pipe. At this time, the vacuum pump 51 is started to evacuate the vacuum suction cup 41, thereby generating negative pressure at its end, thereby adsorbing and fixing the battery cell on its surface. After fixation, the three-way solenoid valve 46 is closed again.

[0070] The negative pressure unit 50 also includes an air pump 52, which is fixed on the inner top wall of the mounting platform 33. It is worth noting that the surface of the mounting platform 33 is provided with air holes corresponding to the vacuum pump 51 and the air pump 52. At the same time, a battery is provided on the side of the lower surface of the mounting platform 33 away from the vacuum pump 51 and the air pump 52, which is used for counterweighting and maintaining the balance of the mounting platform 33, and at the same time, the vacuum pump 51 and the air pump 52 are powered so that the vacuum pump 51 and the air pump 52 can be powered during the rotation process, and the other mentioned electrical components are connected to the external power supply. An air supply ring pipe 54 is fixed to the inner wall of the mounting platform 33 below the air extraction ring pipe 53, and an air supply main pipe is fixed to the output end of the air pump 52. One end of the air supply main pipe is fixedly connected to the air supply ring pipe 54, and a plurality of air supply sub-pipes are fixedly connected to the air supply ring pipe 54, and one end of the air supply sub-pipe is fixed to the other end of the three-way solenoid valve 46.

[0071] When the battery cell that has been passivated and coated rotates to the top cover 37 near the outlet, the three-way solenoid valve 46 is controlled to connect the rotary joint 42 with the air supply auxiliary pipe. At this time, the air pump 52 is started to supply air to the air supply ring pipe 54, and then the air enters the connected vacuum suction cup 41 through the air supply auxiliary pipe to release the negative pressure adsorption state of the battery cell. After the negative pressure adsorption state is released, the three-way solenoid valve 46 is closed again.

[0072] like Figure 2 , Figure 6 and Figure 7 As shown, the suction cup member 40 further includes a push block 47. A mounting groove corresponding to the push block 47 is provided on one side of the upper surface of the vacuum suction cup 41. The push block 47 is rotatably connected in the mounting groove. Magnets 48 are fixed on the lower surface of the push block 47 and the upper surface of the mounting groove, and the magnetic poles of the contact surfaces of the two magnets 48 are opposite. A guide seat 410 for driving the push block 47 to tilt upward is fixed on one side of the middle tube 61 near the outlet of the top cover 37;

[0073] In the initial state, the push block 47 is in the installation groove and is flush with the vacuum suction cup 41. At this time, the push block 47 is fixed in the installation groove under the action of the opposite attraction of the two magnets 48. After the fixation of the battery that has completed the passivation coating is released, when the vacuum suction cup 41 rotates to contact the end of the push block 47 with the guide seat 410 and continues to rotate to a position relative to the outlet of the top cover 37 after contact, the push block 47 tilts upward under the action of the guide seat 410, thereby pushing the battery cell to tilt upward, thereby sliding into the discharge guide table 312, and finally sliding to the surface of the conveyor 20 at the outlet for transmission. It is worth noting that the mounting table 33 is in a state of uniform rotation, and the speed is relatively slow, which will not drive the battery cell that has been released from the fixation to shift due to centrifugal force during the subsequent rotation to the outlet.

[0074] Specifically, when the solar cell passivation coating device is working / in use:

[0075] First, in the initial state, a vacuum suction cup 41 is at the entrance of the top cover 37. At this time, a battery cell is conveyed into the feeding guide 39 through the conveyor 20 on the entrance and exit side. During the process, the number and position of the cut surfaces of the battery cell are recorded by the camera and fed back to the control system. Under the action of the tilting force, the battery cell slides to the surface of the vacuum suction cup 41.

[0076] At this time, the three-way solenoid valve 46 is controlled to connect the rotary joint 42 with the auxiliary exhaust pipe, and then the vacuum pump 51 is started to evacuate the vacuum suction cup 41, thereby generating negative pressure at its end, so that the battery cell on its surface is adsorbed and fixed. After fixing, the three-way solenoid valve 46 is closed again. During the downward movement, the motor 36 is then started, and its output end drives the gear 35 to rotate, and then drives the inner gear ring 34 to drive the mounting platform 33 to rotate, so that the vacuum suction cup 41 installed on the mounting platform 33 rotates with it, so that the new vacuum suction cup 41 rotates to the inlet, and the above-mentioned operation of receiving the battery cell is completed. At the same time, the vacuum suction cup 41 with the battery cell fixed on the surface rotates toward the first passivation nozzle 38;

[0077] According to the position of the cut surface of the battery cell on its surface, when there is a cut surface at the outward end of the battery cell, during the rotation to the passivation nozzle 38, the first electric push rod 44 drives the toothed member 45 to move inward, so that the vacuum suction cup 41 does not contact the outer tooth ring 43 on the vacuum suction cup 41 during the first rotation of the mounting platform 33, thereby keeping the vacuum suction cup 41 in place, so that the outward cut surface of the battery cell can be opposite to the passivation nozzle 38. After adjustment, the rotation is continued until the outward cut surface of the battery cell is aligned with the passivation nozzle. 38 alignment, during this process, the vacuum suction cup 41 is gradually pushed by the spherical bump 411 until the cut surface is tilted downward toward the side of the passivation nozzle 38, so that when the cut surface is passivated, the material used can be prevented from entering the gap of the battery cell as much as possible, and then the material is fed into the passivation nozzle 38, and then the cut surface of the battery cell facing outward is passivated. After the passivation coating is completed, it continues to rotate, and the vacuum suction cup 41 gradually returns to a horizontal state before the outer tooth ring 43 on it contacts the next toothed member 45;

[0078] At the same time, it is worth noting that when the cut surface of the battery cell sliding to the surface of the vacuum suction cup 41 faces outward, the first toothed member 45 needs to be controlled to move inward all the time, and during the continued rotation, the other four toothed members 45 need to remain in place, so that during the continued rotation of the mounting table 33, the vacuum suction cup 41 can rotate 360° under the action of the four toothed members 45, so that it can be restored to the state where the push block 47 faces inward before discharging. During the four rotations, the corresponding passivation nozzle 38 is opened according to the position of the remaining cut surface that has not been passivated, and the passivation coating operation on the remaining cut surface is completed;

[0079] At the same time, when the cut surface of the battery cell sliding to the surface of the vacuum suction cup 41 is not facing outward, the first toothed member 45 needs to be controlled to remain in place so that the battery cell rotates 90° when in contact with it. It should be noted that one of the subsequent four toothed members 45 needs to be retracted inward to keep the vacuum suction cup 41 able to rotate 360° while following the installation table 33 to revolve 180°. At the same time, the corresponding passivation nozzle 38 needs to be controlled to discharge materials to complete the passivation coating operation on the cut surface of the battery cell;

[0080] During the operation, the exhaust fan 62 is started to discharge the air in the top cover 37 to the outside in real time, so as to avoid the gas existing before and after the passivation coating to affect the ongoing passivation coating operation;

[0081] When the cell on the vacuum suction cup 41 completes the cross-section passivation coating and rotates to the entrance of the top cover 37, the three-way solenoid valve 46 is controlled to connect the rotary joint 42 with the air supply auxiliary pipe. At this time, the air pump 52 is started to supply air to the air supply ring pipe 54, and then enters the connected vacuum suction cup 41 through the air supply auxiliary pipe to release the negative pressure adsorption state of the cell. At this time, when the vacuum suction cup 41 rotates to contact the end of the push block 47 with the guide seat 410 and continues to rotate to a position relative to the exit of the top cover 37 after contact, the push block 47 tilts upward under the action of the guide seat 410, thereby pushing the cell to tilt upward, thereby sliding into the discharge guide table 312, and finally sliding to the surface of the conveyor 20 at the exit for transmission. After continuing to rotate, the push block 47 falls naturally and is fixed in the mounting groove by adsorption by the magnet 48. This reciprocating process completes the cross-section passivation coating operation of all solar cell cells.

[0082] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solar cell passivation coating device, comprising a frame (10) and two conveyors (20) mounted on the frame (10), wherein a rotating seat (30) is mounted in the middle of the frame (10), wherein the rotating seat (30) comprises a passivation nozzle (38), and an exhaust unit (60) is mounted in the rotating seat (30), characterized in that: A plurality of suction cup members (40) are mounted on the rotating seat (30), and the suction cup members (40) are connected to a negative pressure unit (50) for generating negative pressure or positive pressure on the suction cup members (40) via a three-way solenoid valve (46) at the end thereof; The suction cup member (40) comprises a vacuum suction cup (41), the bottom of the vacuum suction cup (41) is fixedly connected to a rotary joint (42), the three-way solenoid valve (46) is mounted on the fixed end of the rotary joint (42), the bottom fixed sleeve of the outer surface of the rotary end of the rotary joint (42) is provided with an outer toothed ring (43), the exhaust unit (60) is equipped with at least four electric push rods (44), one end of each electric push rod (44) is equipped with a toothed member (45) for driving the outer toothed ring (43) to rotate 90 degrees; The rotating seat (30) drives the battery cell that has slid from one of the conveyors (20) to the surface of the vacuum suction cup (41) and is fixed by negative pressure suction to revolve. During the rotation process, under the action of the toothed parts (45) at different positions, the unpassivated cut surface of the battery cell driven by the vacuum suction cup (41) is driven to rotate to a position corresponding to the passivation nozzle (38).

2. The solar cell passivation coating device according to claim 1, characterized in that: The suction cup member (40) further comprises a push block (47); a mounting groove corresponding to the push block (47) is provided on one side of the upper surface of the vacuum suction cup (41); the push block (47) is rotatably connected in the mounting groove; magnets (48) are fixed to the lower surface of the push block (47) and the upper surface of the mounting groove; and the contact surfaces of the two magnets (48) have opposite magnetic poles.

3. The solar cell passivation coating device according to claim 1, characterized in that: The rotating seat (30) further comprises a bottom plate (31), a fixed seat (32) being mounted on the bottom plate (31), a mounting platform (33) being rotatably connected inside the fixed seat (32), an inner gear ring (34) being fixed to the bottom of the inner wall of the mounting platform (33), a gear (35) meshing with the inner gear ring (34) being rotatably connected to one side of the inner bottom wall of the fixed seat (32), a motor (36) being mounted on the lower surface of the bottom plate (31), an output end of the motor (36) being spline-connected to one end of the gear (35).

4. The solar cell passivation coating device according to claim 3, characterized in that: A top cover (37) is fixed at the edge of the mounting platform (33), the passivation nozzle (38) is fixed on the inner wall of the top cover (37), a feed guide platform (39) is fixed at the inlet of the top cover (37), one end of the feed guide platform (39) is in contact with one of the conveyors (20), and a discharge guide platform (312) is fixed at the outlet of the top cover (37), one end of the discharge guide platform (312) is in contact with the other conveyor (20).

5. The solar cell passivation coating device according to claim 4, characterized in that: A fixed limit rod (310) extending from the vacuum suction cup (41) is fixed on one side of the feed guide platform (39), and a connecting seat is fixed on the other side of the feed guide platform (39), and a moving limit rod (311) extending from the vacuum suction cup (41) is rotatably connected to the connecting seat.

6. The solar cell passivation coating device according to claim 3, characterized in that: The mounting platform (33) is provided with a mounting hole corresponding to the rotary joint (42), the rotary joint (42) is inserted into the mounting hole, the outer surface of the rotary end of the rotary joint (42) is fixedly sleeved with a damping pad (49) adapted to the inner cavity of the mounting hole, the outer wall of the damping pad (49) is in contact with the inner wall of the mounting hole, so that the rotary end of the rotary joint (42) remains in a fixed position after rotation; Two retaining tubes (412) are fixed to the fixed end of the rotary joint (42), the retaining tube (412) is connected to an extension rod via a spring, one end of the extension rod is fixed to a shaft rod, the extension rod is rotatably connected to a suspension rod (413) via the shaft rod, the top ends of the two suspension rods (413) are fixed to the lower surface of the mounting platform (33), so that the fixed end position of the rotary joint (42) is fixed, and the shaft rod is equipped with a torsion spring for driving the extension rod to self-reset to a horizontal state after following the tilt of the rotary joint (42).

7. The solar cell passivation coating device according to claim 3, characterized in that: The negative pressure unit (50) comprises a vacuum pump (51) fixed on the inner top wall of the mounting platform (33), an exhaust ring pipe (53) fixed on the inner wall of the mounting platform (33), an exhaust main pipe fixed on the air inlet end of the vacuum pump (51), one end of the exhaust main pipe fixedly connected to the exhaust ring pipe (53), a plurality of exhaust sub-pipes fixedly connected to the exhaust ring pipe (53), one end of the exhaust sub-pipes fixedly connected to one end of the three-way solenoid valve (46).

8. The solar cell passivation coating device according to claim 7, characterized in that: The negative pressure unit (50) further comprises an air pump (52), the air pump (52) being fixed on the inner top wall of the mounting platform (33), an air supply ring tube (54) being fixed on the inner wall of the mounting platform (33) below the air extraction ring tube (53), an air supply main tube being fixed on the output end of the air pump (52), one end of the air supply main tube being fixedly connected to the air supply ring tube (54), a plurality of air supply sub-tubes being fixedly connected to the air supply ring tube (54), one end of the air supply sub-tube being fixedly connected to the other end of the three-way solenoid valve (46).

9. The solar cell passivation coating device according to claim 3, characterized in that: The exhaust unit (60) comprises a middle tube (61), a through hole matching the middle tube (61) is opened in the middle of the mounting platform (33), the middle tube (61) is inserted into the through hole, one end of the middle tube (61) inserted into the mounting platform (33) is fixed to the inner bottom wall of the fixing seat (32), and the electric push rod (44) is fixed to the inner wall of the middle tube (61); A guide seat (410) for driving the push block (47) to tilt upward is fixed on one side of the middle tube (61) close to the outlet of the top cover (37), and a plurality of spherical protrusions (411) for driving the vacuum suction cup (41) close to the passivation nozzle (38) to tilt downward are fixed on the edge of the upper surface of the middle tube (61).

10. The solar cell passivation coating device according to claim 9, characterized in that: The top end of the middle tube (61) is fixedly connected to a protruding cover (63), a plurality of air inlet holes are provided on the outer wall of the protruding cover (63), an exhaust fan (62) is mounted on the inner bottom wall of the fixed seat (32), an exhaust pipe is fixed to the input end of the exhaust fan (62), and the top end of the exhaust pipe is plugged into the protruding cover (63).

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