CN111192940A - Two-stage welding type IBC solar cell string welding device and welding method thereof - Google Patents
Two-stage welding type IBC solar cell string welding device and welding method thereof Download PDFInfo
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- CN111192940A CN111192940A CN202010038707.7A CN202010038707A CN111192940A CN 111192940 A CN111192940 A CN 111192940A CN 202010038707 A CN202010038707 A CN 202010038707A CN 111192940 A CN111192940 A CN 111192940A
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- 238000003466 welding Methods 0.000 title claims abstract description 673
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005493 welding type Methods 0.000 title claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 126
- 238000001179 sorption measurement Methods 0.000 claims description 159
- 230000007246 mechanism Effects 0.000 claims description 134
- 230000001360 synchronised effect Effects 0.000 claims description 98
- 238000005520 cutting process Methods 0.000 claims description 73
- 239000000463 material Substances 0.000 claims description 42
- 210000000078 claw Anatomy 0.000 claims description 37
- 229910000679 solder Inorganic materials 0.000 claims description 37
- 230000003287 optical effect Effects 0.000 claims description 32
- 238000005476 soldering Methods 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 12
- 230000007306 turnover Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000012636 effector Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a two-stage welding type IBC solar cell string welding device and a welding method thereof. Compared with the conventional series welding machine in which the metal wire is fixed by the rear battery piece, the IBC battery cannot fix the metal wire, and a net pressing clamp is required to cover and fix the IBC battery. The invention comprises a light welding module, a final welding module, a battery string transfer module, a light welding base and a final welding base. The light welding module comprises a welding strip feeding device, a welding strip transferring device, a light welding device, a clamp backflow device, a third battery conveyor, a clamp conveyor and a pressing positioning clamp. The final welding module comprises a final welding base, a final welding conveyor, a final welding pushing device and six pressure welding devices. The final welding pushing and lifting device comprises a pushing and lifting frame and a pushing and lifting electric cylinder. According to the invention, the battery plate and the welding strip are firstly primarily welded through the light welding module, and then the battery plate and the welding strip are reliably welded through the final welding module; the invention realizes the full automation of the production of the battery plate on the premise of hardly influencing the quality of the battery plate.
Description
Technical Field
The invention belongs to the technical field of solar cell production equipment, and particularly relates to a two-stage welding type IBC solar cell string welding device and a welding method thereof.
Background
The IBC cell (full back electrode contact crystalline silicon photovoltaic cell) is a technology that metal contacts of a positive pole and a negative pole are moved to the back of a cell piece, so that the front of the cell piece facing the sun is in full black, and metal wires on the front of most photovoltaic cells cannot be seen completely. The power generation device not only brings more effective power generation area for users, but also is beneficial to improving the power generation efficiency, and is more attractive in appearance. The IBC battery is mainly characterized in that a PN junction and metal contact are both arranged on the back surface of the battery, and the front surface of the IBC battery is not influenced by shielding of a metal electrode, so that the IBC battery has higher short-circuit current Jsc, and meanwhile, wider metal grid lines can be allowed on the back surface to reduce series resistance Rs so as to improve a filling factor FF; the addition of the Front Surface Field (FSF) and the open circuit voltage gain from the good passivation results in a high conversion efficiency for such a Front side unobstructed cell. Because the metal wire all is in the back of battery piece, the in-process of stringer puts forward higher requirement to the placing of metal wire is fixed, compares in the position that a slice of battery piece comes fixed metal wire behind the conventional stringer, and the IBC battery can't accomplish this point, needs to use the pressure net anchor clamps to cover fixedly.
Disclosure of Invention
The invention aims to overcome the technical defect that an IBC solar cell string in the prior art is difficult to automatically weld, and provides a two-stage welding type IBC solar cell string welding device and a welding method thereof.
The invention discloses a two-stage welding type IBC solar cell string welding device which comprises a light welding module (1), a final welding module (2), a cell string transfer module (3), a light welding base (4) and a final welding base (5). The light welding base (4) and the final welding base (5) are fixed together. The final welding module (2) is installed on the final welding base (5). The battery string transfer module (3) is installed at the output end of the photosolder base (4) and used for transferring the battery string output on the photosolder module (1) to the final welding module (2).
The light welding module (1) comprises a welding strip feeding device (8), a welding strip transfer device (9), a light welding device (10), a clamp backflow device (11), a light welding battery conveyor (12), a clamp conveyor (13) and a pressing positioning clamp (14). The clamp conveyor (13) is located on one side of the light-welded battery conveyor (12). The welding strip feeding device (8) is positioned below the output end of the clamp conveyor (13). The solder strip transfer device (9) is positioned above the input end of the light-welded battery conveyor (12) and the output end of the clamp conveyor (13). The solder strip transfer device (9), the optical soldering device (10) and the clamp reflow device (11) are sequentially arranged along the conveying direction of the optical soldering battery conveyor (12). And a heating lamp tube is arranged in the optical welding device (10). The heating lamp tube irradiates the battery piece and the welding strip for welding. The solder strip transfer device (9) transfers the pressing and positioning clamp (14) from the output end of the clamp conveyor (13) to the input end of the photosolder battery conveyor (12); the clamp reflow device (11) transfers the pressing and positioning clamp (14) which completes pressing from the light-welded battery conveyor (12) to the input end of the clamp conveyor (13). The light-welding battery conveyor (12) adopts a vacuum adsorption type belt conveyor. Four conveying belts are arranged in the light welding battery conveyor (12). The distance between two outer conveyer belts of the four conveyer belts in the light welding battery conveyer (12) is larger than the width of the battery piece.
The pressing positioning clamp (14) comprises an end fixing block (14-1), a connecting frame (14-2), a pressing wire (14-3) and a linkage pressing rod (14-4). Two ends of the connecting frame (14-2) and the two end fixing blocks (14-1) respectively form sliding pairs which slide along the thickness direction of the end fixing blocks (14-1). The two end fixing blocks (14-1) are fixed with each other. The opposite sides of the two end fixing blocks (14-1) are provided with grabbing grooves. A plurality of pressing wires (14-3) which are sequentially arranged at intervals along the width direction of the connecting frame (14-2) are all fixed on the connecting frame (14-2). The two ends of the connecting frame (14-2) are provided with clamping grooves. The two end fixing blocks (14-1) are provided with linkage pressing rods (14-4). The middle part of the linkage pressing rod (14-4) and the corresponding end fixing block (14-1) form a revolute pair. One end of the linkage pressing rod (14-4) extends into the clamping groove on the connecting frame (14-2). The other end of the linkage pressing rod (14-4) is higher than the top surface of the end fixing block (14-1).
The welding strip feeding device (8) comprises a feeding frame (8-1), a feeding guide rail (8-2), a material pulling mechanism, a clamping and cutting mechanism and a welding strip unwinding mechanism (8-10). The feeding frame (8-1) is fixed with the light welding base (4). The feeding guide rail (8-2) is fixed on the feeding frame (8-1). The material pulling mechanism comprises a material pulling sliding table (8-3), a first material supply driving assembly and a first mechanical clamping jaw (8-4). The material pulling sliding table (8-3) and the material feeding guide rail (8-2) form a sliding pair. The material pulling sliding table (8-3) is driven by a first material supply driving component. Four first mechanical clamping jaws (8-4) which are sequentially arranged are arranged on the material pulling sliding table (8-3).
The clamping and cutting mechanism comprises a clamping and cutting sliding table (8-6), a second feeding driving assembly, a cutting assembly (8-7) and a second mechanical clamping jaw (8-8). The clamping and cutting sliding table (8-6) and the two feeding guide rails (8-2) form a sliding pair. The clamping and cutting sliding table (8-6) is driven by a second feeding driving component. Four second mechanical clamping jaws (8-8) which are sequentially arranged are arranged on the clamping and cutting sliding table (8-6). The four second mechanical gripping jaws (8-8) are aligned with the four first mechanical gripping jaws (8-4), respectively. The cutting assembly (8-7) is arranged between the first mechanical clamping jaw (8-4) and the second mechanical clamping jaw (8-8).
The welding strip transfer device (9) comprises a first transverse moving mechanism (9-1), a first lifting mechanism and a welding strip clamp synchronous grabbing mechanism. The first transverse moving mechanism (9-1) is arranged on the light welding base. The first lifting mechanism is arranged on the first transverse moving mechanism (9-1). The synchronous grabbing mechanism of the welding strip clamp is arranged on the first lifting mechanism. The synchronous grabbing mechanism of the welding strip clamp comprises a first grabbing support (9-5), a first welding strip feeding adsorption assembly, a second welding strip feeding adsorption assembly and a clamp clamping assembly. The clamp clamping assembly comprises two single-sided clamping jaws (9-6) and two single-sided pushing elements (9-11). The single-side clamping jaws (9-6) are respectively arranged at two sides of the first grabbing bracket (9-5). Two unilateral clamping jaws (9-6) respectively clamp two ends of the pressing positioning clamp (14). Two single-side pushing pieces (9-11) are arranged on the first grabbing bracket (9-5) in a centering mode and located between the two single-side clamping jaws (9-6). Two single-side pushing and pressing pieces (9-11) respectively push and press linkage pressing rods (14-4) on the two end fixing blocks (14-1).
The first welding strip feeding adsorption assembly is positioned between the two single-side pushing pieces (9-11) and comprises a first pushing cylinder (9-7) and an inserting adsorption block (9-8). The penetrating adsorption block (9-8) moves up and down through the first pushing-down cylinder (9-7). The penetrating adsorption block (9-8) is composed of a base plate (9-8-1) and a plurality of vertical adsorption plates (9-8-2) which are integrally formed. The tops of the vertical adsorption plates (9-8-2) which are vertically arranged are connected with the base plate (9-8-1). The vertical adsorption plates (9-8-2) are arranged at equal intervals in sequence. The sum of the width of the vertical adsorption plate (9-8-2) and the distance between two adjacent vertical adsorption plates (9-8-2) is equal to the center distance of two adjacent pressing wires (14-3) in the pressing and positioning fixture (14). The distance between two adjacent vertical adsorption plates (9-8-2) is larger than the diameter of the pressing wire (14-3); the bottom of each vertical adsorption plate (9-8-2) is provided with four first adsorption grooves (9-8-3) which are arranged at equal intervals in sequence. The bottoms of the four first adsorption grooves (9-8-3) are provided with first adsorption ports.
And the second welding strip feeding adsorption assembly is positioned on one side of the first welding strip feeding adsorption assembly, which is far away from the input end of the clamp conveyor. The second welding strip feeding adsorption assembly comprises a second push-down cylinder (9-9) and a horizontal adsorption plate (9-10). The horizontal adsorption plates (9-10) move up and down through the second push-down cylinders (9-9). The bottom of each horizontal adsorption plate (9-10) is provided with four second adsorption grooves which are sequentially arranged at equal intervals. The four second adsorption grooves on the horizontal adsorption plate (9-10) are respectively aligned with the four first adsorption grooves (9-8-3) on the vertical adsorption plate (9-8-2). A plurality of second adsorption ports are formed in the second adsorption groove.
The clamp backflow device (11) comprises a second transverse moving mechanism (11-1), a second lifting mechanism and a clamp grabbing mechanism. The second transverse moving mechanism (11-1) is arranged on the light welding base. The second lifting mechanism is arranged on the second transverse moving mechanism (11-1). The fixture grabbing mechanism is installed on the second lifting mechanism.
The final welding module (2) comprises a final welding base (5), a final welding conveyor (14), a final welding push-lift device and six pressure welding devices (15). The final welding pushing and lifting device comprises a pushing and lifting frame (16) and a pushing and lifting electric cylinder (17). The pushing and lifting frame (16) and the final welding base (5) form a sliding pair which slides along the vertical direction. The lifting frame (16) is driven by a lifting electric cylinder (17). The input end of the finish welding conveyor (14) is arranged side by side with the output end of the photosolder battery conveyor (12). The six pressure welding devices (15) are all arranged on the pushing and lifting frame (16) and are sequentially arranged along the conveying direction of the final welding conveyor (14). The final welding conveyor (14) is arranged on the pushing and lifting frame (16). The final welding conveyor (14) adopts a vacuum adsorption type belt conveyor. Two conveying belts are arranged in the final welding conveyor (14) in parallel at intervals.
The pressure welding device (15) comprises a pressure welding base (15-1), a pressure welding support (15-2), a pressure welding lifting mechanism, a pressure welding support plate (15-3) and a welding mechanism (15-4). The pressure welding base (15-1) is fixed on the final welding base (5). The pressure welding bracket (15-2) is arranged on the pressure welding base (15-1). The pressure welding support plate (15-3) is fixed on the pressure welding support (15-2) and is positioned between two conveying belts of the final welding conveyor (14); in the initial state, the top surface of the pressure welding supporting plate (15-3) is lower than the top surfaces of the two conveying belts of the final welding conveyor (14).
The welding mechanism (15-4) is arranged on the pressure welding bracket (15-2) through a pressure welding lifting mechanism. The welding mechanism (15-4) is positioned right above the pressure welding support plate (15-3) and comprises a final welding radiator (15-4-1), a diaphragm replacement assembly and four welding units. The four welding units are arranged in sequence, and the arrangement direction is vertical to the conveying direction of the final welding conveyor (14). The bottom of the welding unit is provided with a press welding head (15-4-4).
The membrane replacement assembly comprises a membrane support (15-4-10), a winding drum (15-4-11), a recovery drum (15-4-12), a coiled membrane and an unwinding driving assembly (15-4-13). The diaphragm support (15-4-10) is fixed with the pressure welding lifting sliding table (15-10). The winding discharging drum (15-4-11) and the recycling drum (15-4-12) are respectively supported at two ends of the diaphragm support (15-4-10) and are respectively positioned at two sides of the four pressure welding heads (15-4-4). Two ends of the coiled membrane are respectively wound on the winding drum (15-4-11) and the recovery drum (15-4-12). The part of the coiled membrane between the coil outlet cylinder (15-4-11) and the recovery cylinder (15-4-12) bypasses the bottom of the four press welding heads (15-4-4). The recycling cylinder (15-4-12) is driven by the unreeling driving component (15-4-13).
Preferably, the two-stage welding type IBC solar cell string welding device further comprises a feeding robot (6) and a feeding tray (7). The number of the light welding modules (1) is two. The two light welding modules (1) are arranged on the light welding base (4) side by side. Two material loading robots (6) and two material loading trays (7) are installed at the input end of the optical welding base (4). The two feeding robots (6) correspond to the two feeding trays (7) respectively. The feeding robot (6) adopts an industrial robot with an end effector as a pneumatic sucker.
Preferably, the vacuum adsorption type belt conveyor comprises a conveying frame, a transmission roller, a conveying belt, a conveying motor and a conveying adsorption plate. The two transmission rollers are respectively supported at two ends of the conveying frame. The conveyer belt is all walked around two driving pulley, and is passed through the take-up pulley tensioning. One or more conveyer belts; in the case of a plurality of conveyor belts, the conveyor belts are arranged at intervals in sequence. The conveying motor is fixed on the conveying frame, and the output shaft is fixed with one of the transmission rollers. The conveyer belt is provided with a plurality of waist-shaped holes which are sequentially arranged along the length direction of the conveyer belt. The conveying adsorption plate is fixed on the conveying frame. The conveying adsorption plate is positioned below the conveying section of the conveying belt. One or more rows of adsorption holes are arranged on the top surface of the conveying adsorption plate. The number of rows of the adsorption holes is equal to the number of the conveying belts. The adsorption holes in each row are respectively aligned with the waist-shaped holes on each conveying belt. The conveying adsorption plate is internally provided with a cavity.
Preferably, the clamp conveyor (13) is provided with two conveyor belts which are arranged side by side and at intervals. And second side baffles are arranged on two sides of the top of the clamp conveyor (13). The distance between the two second side baffles is equal to the length of the clamp. The output end of the clamp conveyor (13) is provided with a first limiting sensor. The first limit sensor adopts an infrared diffuse reflection sensor. The first limit sensor faces the input end of the clamp conveyor (13).
The first feeding driving assembly comprises a first feeding synchronous belt, a first feeding synchronous wheel and a first feeding driving motor (8-5). The two first feeding synchronous wheels are respectively supported at two ends of the feeding frame (8-1) and are connected through a first feeding synchronous belt. The material pulling sliding table (8-3) is fixed with the first material supply synchronous belt. The first feeding driving motor (8-5) is fixed on the feeding frame (8-1), and the output shaft is fixed with one first feeding synchronous wheel.
The second feeding driving assembly comprises a second feeding synchronous belt, a second feeding synchronous wheel and a second feeding driving motor (8-9). The two second feeding synchronous wheels are respectively supported at two ends of the feeding frame (8-1) and are connected through a second feeding synchronous belt. The clamping and cutting sliding table (8-6) is fixed with a second feeding synchronous belt. The second feeding driving motor (8-9) is fixed on the feeding frame (8-1), and the output shaft is fixed with one of the second feeding synchronizing wheels.
The first mechanical clamping jaw (8-4) comprises a first jaw frame (8-4-1), a first clamping cylinder (8-4-2), a first connecting rod (8-4-3) and a first single jaw (8-4-4). The first claw frame (8-4-1) is fixed on the material pulling sliding table (8-3). The first clamping cylinder (8-4-2) is fixed on the first claw frame (8-4-1). The inner ends of the two first connecting rods (8-4-3) are hinged with the outer end of a piston rod of the first clamping cylinder (8-4-2), and the outer ends of the two first connecting rods are hinged with the inner ends of the two first single claws (8-4-4) respectively; the middle parts of the two first single claws (8-4-4) are hinged with the first claw frame (8-4-1).
The second mechanical clamping jaw (8-8) comprises a second jaw frame (8-8-1), a second clamping cylinder (8-8-2), a fixed clamping block (8-8-3) and a movable clamping block (8-8-4). The second claw frame (8-8-1) is fixed on the clamping and cutting sliding table (8-6). The fixed clamping block (8-8-3) is fixed at the top of the second clamping frame. The middle part of the movable clamping block (8-8-4) is hinged with the fixed clamping block (8-8-3). The outer end of the movable clamping block (8-8-4) is provided with a horizontal clamping rod.
The cutting assembly (8-7) comprises a cutting frame, an upper tool rest, a lower tool rest, an upper cutting cylinder (8-7-1) and a lower cutting cylinder (8-7-2). The cutting frame is fixed on the clamping and cutting sliding table (8-6). The upper tool rest and the lower tool rest are arranged up and down and form a sliding pair sliding along the vertical direction together with the cutting frame. The upper knife rest and the lower knife rest are both fixed with cutters. The two cutters are corresponding in position. The upper cutting cylinder (8-7-1) and the lower cutting cylinder (8-7-2) are both fixed with the cutting frame. Piston rods of the upper cutting cylinder (8-7-1) and the lower cutting cylinder (8-7-2) are respectively fixed with the upper tool rest and the lower tool rest. Four guide rings which are arranged in sequence are fixed on the feeding frame (8-1). The four guide rings are positioned on one side of the second mechanical clamping jaw (8-8) far away from the first mechanical clamping jaw (8-4) and are respectively aligned with the four second mechanical clamping jaws (8-8). The four solder strip unwinding mechanisms (8-10) are all arranged on the light welding base (4). The welding strips discharged by the four welding strip unwinding mechanisms (8-10) respectively pass through the corresponding guide rings, pass between the fixed clamping blocks (8-8-3) corresponding to the second mechanical clamping jaws (8-8) and the clamping rod, and pass through the space between the two cutters, and the end parts of the welding strips are clamped by the corresponding first mechanical clamping jaws (8-4).
Preferably, the single-side clamping jaw (9-6) comprises a first grabbing cylinder, a second connecting rod and a first hook jaw (9-6-1). The middle part of the first hook claw (9-6-1) is hinged with the first grabbing bracket (9-5) respectively. The first grabbing cylinder is fixed with the first grabbing bracket (9-5). One end of the second connecting rod is hinged with a piston rod of the first grabbing cylinder, and the other end of the second connecting rod is hinged with one end of the first hook claw (9-6-1). The single-side pushing piece (9-11) comprises a pushing cylinder and a pushing block. The pushing cylinder is fixed on the first grabbing bracket (9-5), and the piston rod is arranged downwards. A push block is fixed on the piston rod of the piston rod. The positions of the two push blocks correspond to two end fixing blocks (14-1) on a pressing and positioning clamp (14) clamped by the two unilateral clamping jaws (9-6) respectively.
The clamp grabbing mechanism comprises a second grabbing support (11-5), two second grabbing cylinders (11-6) and two clamping jaw assemblies. The second grabbing bracket (11-5) is fixed on the second lifting sliding table (11-4). The clamping jaw assembly comprises a turnover strip (11-8) and two second hook claws (11-7). The two second hook claws (11-7) and the turning strip (11-8) form sliding pairs and are positioned through set screws. The two clamping jaw assemblies are respectively arranged at two sides of the second grabbing bracket (11-5). The cylinder bodies of the two second grabbing cylinders (11-6) are hinged with the second grabbing bracket (11-5). Piston rods of the two second grabbing cylinders (11-6) are respectively hinged with the two turning strips (11-8).
Preferably, the light welding device (10) comprises a welding frame (10-1), a light welding transverse adjusting assembly, a longitudinal adjusting assembly, a turnover assembly, a mounting frame (10-2), a preheating unit (10-3) and a light welding unit (10-4). The welding frame (10-1) is fixed on the optical welding base (4). The light welding transverse adjusting assembly comprises a transverse adjusting slide rail (10-5), a transverse adjusting frame (10-6), a transverse adjusting bolt (10-7) and a locking block (10-8). The transverse adjusting slide rail (10-5) is fixed on the welding frame (10-1). The transverse adjusting frame (10-6) and the transverse adjusting slide rail (10-5) form a sliding pair. The horizontal adjusting bolt (10-7) arranged horizontally and the welding frame (10-1) form a revolute pair, and the horizontal adjusting bolt and the horizontal adjusting frame (10-6) form a screw pair. The transverse adjusting bolt (10-7) is locked by the locking block (10-8). The locking block (10-8) consists of a spanner bolt and a clamping block with a deformation joint. The spanner bolt can extrude the deformation joint by rotating, so that the locking block (10-8) clamps the transverse adjusting bolt (10-7).
The longitudinal adjusting assembly comprises a longitudinal adjusting slide rail, a longitudinal adjusting frame (10-9) and a longitudinal adjusting bolt (10-10). The vertical adjusting slide rail is fixed with the horizontal adjusting frame (10-6). The longitudinal adjusting frame (10-9) and the longitudinal adjusting slide rail form a sliding pair. The top of the longitudinal adjusting frame (10-9) is provided with an adjusting threaded hole. The longitudinal adjusting bolt (10-10) and the adjusting threaded hole on the longitudinal adjusting frame (10-9) form a screw pair and abut against the transverse adjusting frame (10-6). The overturning assembly comprises an overturning frame (10-11) and an overturning cylinder (10-12). The roll-over stand (10-11) is hinged with the longitudinal adjusting stand (10-9). The end part of the cylinder body of the turnover cylinder (10-12) is hinged with the longitudinal adjusting frame (10-9). The outer end of a piston rod of the turnover cylinder (10-12) is hinged with the turnover frame (10-11). The preheating unit (10-3) and the light welding unit (10-4) are both arranged on the roll-over stand (10-11). The preheating unit (10-3) is positioned between the light welding unit (10-4) and the synchronous grabbing mechanism of the welding strip clamp. The preheating unit (10-3) and the light welding unit (10-4) have the same structure and respectively comprise a lampshade, a heating lamp tube and a light welding radiator (10-13). A light-welded heat sink (10-13) is mounted on top of the lamp housing. The heating lamp tube is arranged in the lampshade.
Preferably, a pressure welding transverse adjusting assembly is arranged between the pressure welding bracket (15-2) and the pressure welding base (15-1). The pressure welding transverse adjusting assembly comprises an adjusting seat (15-5), an adjusting screw rod (15-6) and an adjusting nut block (15-7). The bottom of the pressure welding bracket (15-2) and the top surface of the pressure welding base (15-1) form a sliding pair. Two adjusting seats (15-5) are fixed on the pressure welding base (15-1). The adjusting screw (15-6) and the two adjusting seats (15-5) form a revolute pair. The adjusting nut block (15-7) is fixed at the bottom of the pressure welding support (15-2) and forms a screw pair with the adjusting screw rod (15-6).
The pressure welding lifting mechanism comprises a pressure welding lifting screw (15-8), a pressure welding lifting motor (15-9) and a pressure welding lifting sliding table (15-10). A pressure welding lifting screw rod (15-8) which is vertically arranged is supported on the pressure welding bracket (15-2). The pressure welding lifting motor (15-9) is fixed on the pressure welding bracket (15-2), and the output shaft is fixed with the pressure welding lifting screw rod (15-8). The pressure welding lifting sliding table (15-10) and the pressure welding bracket (15-2) form a sliding pair, and form a screw pair with the pressure welding lifting screw rod (15-8).
The welding unit further comprises a single support (15-4-2), an X-axis adjusting assembly, a Y-axis adjusting assembly, a gas spring (15-4-3) and a heating rod. The X-axis adjusting assembly comprises an X-axis mounting bar (15-4-5) and an X-axis bolt (15-4-6). The two ends of the X-axis mounting bar (15-4-5) are provided with rotating short shafts. The rotating short shafts at the two ends of the X-axis mounting bar (15-4-5) and the pressure welding lifting sliding table (15-10) form a rotating pair. Four X-axis bolts (15-4-6) are arranged at two ends of the rotary short shaft in a group in pairs. The vertically arranged X-axis bolt (15-4-6) is in threaded connection with a threaded through hole arranged on the pressure welding lifting sliding table (15-10). The bottom end of the X-axis bolt (15-4-6) props against the top surface of the X-axis mounting bar (15-4-5). Two X-axis bolts (15-4-6) positioned at the same end of the X-axis mounting bar (15-4-5) are respectively positioned at two sides of the central axis of the rotating short shaft. The single bracket (15-4-2) and the X-axis mounting strip (15-4-5) form a sliding pair. The shell of the air spring (15-4-3) is fixed with the X-axis mounting strip (15-4-5), and the elastic telescopic rod is fixed with the single bracket (15-4-2). The Y-axis adjusting assembly comprises a Y-axis mounting strip (15-4-7), a deformation division strip (15-4-8) and a Y-axis bolt (15-4-9). The Y-axis mounting bar (15-4-7) is fixed at the bottom of the single bracket (15-4-2). The pressure welding head (15-4-4) is connected with the Y-axis mounting strip (15-4-7) through a bolt. The length direction of the pressure welding head (15-4-4) is parallel to the conveying direction of the final welding conveyor (14). A deformation parting stop (15-4-8) is padded between the pressure welding head (15-4-4) and the Y-axis mounting strip (15-4-7). The top and the bottom of the deformation parting strip (15-4-8) are both provided with a plurality of deformation grooves. The top of the pressure welding head (15-4-4) is provided with a plurality of deformation joints. A plurality of Y-axis bolts (15-4-9) are in threaded connection with threaded through holes arranged on the Y-axis mounting bars (15-4-7), penetrate through the deformation parting strips (15-4-8) and then abut against the pressure welding heads (15-4-4). Each deformation joint on the pressure welding head (15-4-4) corresponds to two Y-axis bolts (15-4-9). Two Y-axis bolts (15-4-9) corresponding to the deformation joint respectively prop against two sides of the deformation joint. A heating rod is arranged in the pressure welding head (15-4-4). The final-welding radiator (15-4-1) is fixed on the top of the single bracket (15-4-2) of one welding unit.
Preferably, the first transverse moving mechanism (9-1) comprises a first transverse moving frame, a first transverse moving guide rail, a first transverse moving sliding table and a first transverse moving driving assembly. The first transverse moving frame is fixed on the light welding base (4). The first transverse moving guide rail is fixed on the first transverse moving frame and is arranged along the width direction of the light welding base (4); the first transverse sliding table and the first transverse sliding guide rail form a sliding pair. The first transverse moving driving assembly comprises a first transverse moving synchronous belt, a first transverse moving synchronous wheel and a first transverse moving driving motor. The two first transverse moving synchronous wheels are respectively supported at two ends of the first transverse moving frame and are connected through the first transverse moving synchronous belt. The first transverse sliding table is fixed with the first transverse sliding synchronous belt. The first transverse moving driving motor is fixed on the first transverse moving frame, and the output shaft is fixed with one of the first transverse moving synchronous wheels. The first lifting mechanism comprises a first lifting frame (9-2), a first lifting screw (9-3), a first lifting motor (9-4) and a first lifting sliding table. The first lifting frame (9-2) is fixed with the first transverse moving slide block; a first lifting screw rod (9-3) which is vertically arranged is supported on the first lifting frame (9-2). The first lifting motor (9-4) is fixed on the first lifting frame (9-2), and the output shaft is fixed with the first lifting screw rod (9-3). The first lifting sliding table and the first lifting frame (9-2) form a sliding pair, and the first lifting sliding table and the first lifting screw rod (9-3) form a screw pair.
The second transverse moving mechanism (11-1) comprises a second transverse moving frame, a second transverse moving guide rail, a second transverse moving sliding table and a second transverse moving driving assembly. The second transverse moving frame is fixed on the light welding base (4). The second transverse guide rail is fixed on the second transverse frame and arranged along the width direction of the light welding base (4); the second transverse sliding table and the second transverse sliding guide rail form a sliding pair. The second transverse moving driving assembly comprises a second transverse moving synchronous belt, a second transverse moving synchronous wheel and a second transverse moving driving motor. And the two second transverse moving synchronous wheels are respectively supported at two ends of the second transverse moving frame and are connected through the second transverse moving synchronous belt. The second transverse sliding table is fixed with the second transverse sliding synchronous belt. The second transverse moving driving motor is fixed on the second transverse moving frame, and the output shaft is fixed with one of the second transverse moving synchronous wheels. The second lifting mechanism comprises a second lifting frame (11-2), a backflow lifting cylinder (11-3) and a second lifting sliding table (11-4). The second lifting frame (11-2) is fixed with the second transverse moving slide block; the second lifting screw rod which is vertically arranged is supported on the second lifting frame (11-2). The backflow lifting cylinder (11-3) is fixed on the second lifting frame (11-2), and the piston rod is fixed with the second lifting sliding table (11-4).
Preferably, the battery string transferring module (3) comprises a third transverse moving mechanism, a third lifting mechanism and a battery string sucking assembly. The third transverse moving mechanism comprises a third transverse moving frame (18), a third transverse moving guide rail, a third transverse moving sliding table and a third transverse moving driving assembly. The third traverse frame (18) is fixed on the final welding base (5). The third transverse guide rail is fixed on the third transverse frame (18) and is arranged along the width direction of the light welding base (4); the third transverse sliding table and the third transverse sliding guide rail form a sliding pair. The third transverse moving driving component comprises a third transverse moving synchronous belt, a third transverse moving synchronous wheel and a third transverse moving driving motor (19). The two third transverse moving synchronous wheels are respectively supported at two ends of a third transverse moving frame (18) and are connected through a third transverse moving synchronous belt. And the third transverse sliding table is fixed with the third transverse sliding synchronous belt. And a third traverse driving motor (19) is fixed on the third traverse frame (18), and an output shaft is fixed with one of the third traverse synchronizing wheels.
The third lifting mechanism comprises a third lifting frame (20), a lifting electric cylinder (21) and a third lifting sliding table (22). The third lifting frame (20) is fixed with the third transverse moving slide block; a third lifting screw rod which is vertically arranged is supported on a third lifting frame (20). The lifting electric cylinder (21) is fixed on the third lifting frame (20), and the push rod is fixed with the third lifting sliding table (22). The battery string sucking assembly comprises a sucker mounting rod (23) and a pneumatic sucker (24). The middle part of the sucker mounting rod (23) is fixed with the third lifting sliding table (22). The length direction of the sucker mounting rod (23) is parallel to the conveying direction of the light-welded battery conveyor. The bottom of the sucker mounting rod (23) is fixed with a plurality of sucker mounting (23) pieces. The length direction of the sucker mounting (23) piece is vertical to the length direction of the sucker mounting rod (23). Pneumatic suction cups (24) are respectively arranged at the two ends of each suction cup installation piece (23).
The welding method of the two-stage welding type IBC solar cell string welding device comprises the following specific steps:
step one, placing a box body filled with battery pieces on two upper material trays (7). The two feeding robots (6) respectively grab the battery pieces one by one from the corresponding feeding tray (7) and place the battery pieces on the corresponding light welding battery conveyor (12) of the light welding module (1).
And step two, continuously conveying the cell by the aid of the light welding cell conveyor (12) in the light welding module (1), and stopping conveying by the corresponding light welding cell conveyor (12) when one cell reaches the position below the welding strip transfer device (9). The clamp conveyor (13) conveys a pressing and positioning clamp (14) to the lower part of the solder strip transferring device (9) to be used as a working pressing and positioning clamp (14).
Meanwhile, four first mechanical clamping jaws (8-4) in the welding strip feeding device (8) clamp the end parts of four welding strips respectively; the material pulling sliding table (8-3) and the clamping and cutting sliding table (8-6) slide in opposite directions, so that the length of the welding strip between the first mechanical clamping jaw (8-4) and the cutter in the cutting assembly (8-7) reaches a preset value. And four second mechanical clamping jaws (8-8) respectively clamp the corresponding welding strips. The cutting assembly (8-7) cuts the four welding strips. The ends of the four welding strips far away from the first mechanical clamping jaw (8-4) are positioned right below the working pressing positioning clamp (14).
Step three, moving a welding strip clamp synchronous grabbing mechanism in the welding strip transfer device (9) to be right above the four welding strips; two unilateral clamping jaws (9-6) respectively hook two ends of the working pressing positioning clamp (14); then, the two single-side pushing pieces (9-11) are pushed out, so that the connecting frame (14-2) in the working pressing positioning clamp (14) is lifted upwards.
Pushing out by a first downward pushing cylinder (9-7) and a second downward pushing cylinder (9-9); after each vertical adsorption plate (9-8-2) on the interpenetration adsorption block (9-8) passes through the gap between each pressing wire (14-3) on the working pressing positioning fixture (14), each first adsorption groove (9-8-3) at the bottom of the vertical adsorption plate (9-8-2) is respectively contacted with the corresponding welding strip. The second adsorption grooves at the bottom of the horizontal adsorption plates (9-10) are respectively contacted with the corresponding welding strips.
Fifthly, inserting the adsorption blocks (9-8) and the horizontal adsorption plates (9-10) to adsorb the four welding strips; the four first mechanical clamping jaws (8-4) are loosened.
Conveying the working pressing positioning fixture (14) and the four welding strips to the position right above the battery piece of the optical welding battery conveyor by the welding strip transfer device (9), and placing the welding strips and the working pressing positioning fixture (14) on the battery piece; the working pressing positioning fixture (14) is positioned above one battery piece, and the welding strip covers the two battery pieces. The two single-side pushing pieces (9-11) retract, so that the connecting frame (14-2) in the working pressing positioning clamp (14) moves downwards; a pressing wire (14-3) on the working pressing positioning clamp (14) presses one end of each of the four welding strips.
The part of the welding strip which is not pressed by the working pressing and positioning clamp (14) is pressed in the next conveying process of the welding strip and the pressing and positioning clamp (14). Carrying processes of two adjacent welding strips and a pressing positioning clamp (14); the positions of the four welding strips in the previous conveying are staggered with those of the four welding strips in the next conveying; one battery string includes twelve battery cells. The battery piece at the head end battery piece and the battery at the output end are both provided with four welding strips which only cover one battery piece; the eight welding strips only covering one battery piece are also conveyed by the welding strip transfer device (9); when four short welding strips with short lengths positioned at the head end of the electric battery piece are conveyed, the welding strip transfer device (9) does not convey the pressing positioning clamp (14) at the same time.
Seventhly, the battery pieces with the welding strips placed pass through the position right below the light welding device (10) under the conveying of the light welding battery conveyor; the optical welding device (10) heats the battery plate and the welding strip, so that the welding strip and the battery plate are preliminarily welded together.
And step eight, when the pressing and positioning clamp (14) on the light-welding battery conveyor (12) reaches the position below the clamp reflow device (11), the clamp grabbing mechanism in the clamp reflow device (11) conveys the pressing and positioning clamp (14) pressed on the battery piece to the input end of the clamp conveyor (13).
And step nine, when the battery string subjected to primary welding reaches the position below the battery string transfer module (3), if the final welding module (2) is not in welding, the battery string suction assembly in the battery string transfer module (3) sucks the battery string and conveys the battery string to a final welding conveyor (14) of the final welding module (2).
Step ten, conveying the battery strings to six pressure welding devices (15) by a final welding conveyor (14), wherein each battery string contains twelve battery pieces; twelve battery pieces are grouped in pairs, and the six battery pieces are respectively positioned right below the welding mechanisms (15-4) in the six pressure welding devices (15). The lifting electric cylinder (17) drives the lifting frame (16) to slide downwards, so that the final welding conveyor (14) moves downwards and is separated from each battery piece. Each cell is supported by each pressure welding support plate (15-3).
Eleven, heating the pressure welding heads (15-4-4) in the six welding mechanisms (15-4); and the six welding mechanisms (15-4) move downwards, so that the welding strips on each battery string are pressed by the pressing welding heads (15-4-4), and the welding strips and the battery plates are further welded together.
The invention has the beneficial effects that:
1. according to the invention, firstly, the cell and the welding strip are welded together primarily through the light welding module, and then the cell and the welding strip are reliably welded together through the final welding module; and, the invention connects the optical welding module and the final welding module through the battery string transfer module. Therefore, the full automation of the production of the battery piece is realized on the premise of hardly influencing the quality of the battery piece.
2. According to the invention, the welding strip is pressed by the pressing and positioning fixture while being placed, so that the welding strip is prevented from shifting in conveying, and the yield of the battery string is greatly improved.
3. In the final welding process, the battery piece is lifted, so that the condition that the bonding tool damages the conveying is avoided.
4. The welding mechanism has the turning adjusting capability in two directions, and can ensure that the pressure welding head is parallel to the pressure welding supporting plate through correction, thereby avoiding the occurrence of welding dead spots and improving the welding quality.
Drawings
FIG. 1 is a schematic diagram of a soldered IBC solar cell string according to the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic structural view of a photosolder module of the present invention;
FIG. 4 is a schematic view of the pressing positioning fixture of the present invention;
FIG. 5 is a cross-sectional view of the pressing positioning jig of the present invention;
FIG. 6 is a schematic view of the combination of the solder strip feeding apparatus and the jig conveyor of the present invention;
FIG. 7 is a schematic view of the solder ribbon feeding apparatus of the present invention;
FIG. 8 is a schematic view of a first mechanical jaw of the present invention;
FIG. 9 is a schematic diagram of a second mechanical jaw of the present invention;
FIG. 10 is a schematic view of the first traverse mechanism hidden in the solder ribbon transfer apparatus of the present invention;
FIG. 11 is a rear view of the solder strip transfer apparatus of the present invention with the first traverse mechanism hidden;
FIG. 12 is a schematic structural view of the penetrating adsorption blocks in the present invention;
FIG. 13 is a schematic view of the construction of the optical welding apparatus of the present invention;
FIG. 14 is a schematic view of the clip reflow apparatus of the present invention with the second traverse mechanism hidden;
FIG. 15 is a schematic view of the structure of a final welding module according to the present invention;
FIG. 16 is a schematic view showing the structure of the bonding apparatus of the present invention;
FIG. 17 is a schematic view of a welding mechanism hiding a diaphragm replacement assembly in accordance with the present invention;
FIG. 18 is a schematic view of a diaphragm replacement assembly according to the present invention;
fig. 19 is a schematic structural view of a battery string transfer module in the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention is used to produce an "IBC solar cell string". The structure of the IBC solar cell string is shown in fig. 1, and includes six or twelve cell pieces a and a plurality of solder strips B (when six cell pieces are connected into a cell string, the used cell pieces are integral cell pieces, and when twelve cell pieces are connected into a cell string, the used cell pieces are half-piece cell pieces). The battery pieces A are arranged at equal intervals in sequence. Two adjacent battery pieces A are connected through a group of welding strips B. And the welding strips B are four in total and are arranged along the direction vertical to the arrangement of the battery pieces. Two ends of the four welding strips B respectively cover the opposite side edges of the two adjacent battery pieces A. Two groups of adjacent welding strips are staggered; therefore, any one cell A is connected with eight welding strips B. The battery pieces A at the head end and the tail end are respectively provided with four welding strips B which only cover one battery piece.
As shown in fig. 2, the two-stage welding type IBC solar cell string welding apparatus includes a soldering module 1, a final welding module 2, a cell string transfer module 3, a soldering base 4, a final welding base 5, a feeding robot 6, a feeding tray 7, and a controller. The output end of the optical welding base 4 is connected with the input end of the final welding base 5 and fixed together. The number of the photosolder modules 1 is two. Two soldering modules 1 are mounted side by side on a soldering base 4. Two material loading robots 6 and two material loading trays 7 are all installed at the input of the light welding base 4. The two feeding robots 6 correspond to the two feeding trays 7 respectively. The feeding robot 6 adopts an industrial robot with an end effector which is a pneumatic suction cup. The feeding robot 6 is used for grabbing the battery pieces one by one from the corresponding feeding tray 7 and placing the battery pieces on the corresponding photosolder battery conveyor 12 of the photosolder module 1. The finish welding module 2 is mounted on a finish welding base 5. The battery string transfer module 3 is installed at the output end of the photosolder base 4 and used for transferring the battery string output from the photosolder module 1 to the final-welding module 2 for final bonding.
As shown in fig. 2 and 3, the soldering module 1 includes a solder ribbon feeding device 8, a solder ribbon transferring device 9, a soldering device 10, a jig reflow device 11, a soldering battery conveyor 12, a jig conveyor 13, and a press-positioning jig 14. The jig conveyor 13 is located on one side of the photosolder battery conveyor 12. The solder strip feeding device 8 is located below the output end of the jig conveyor 13. The solder strip transfer device 9 is positioned above the input end of the light-welded battery conveyor 12 and the output end of the clamp conveyor 13. The solder ribbon transfer device 9, the optical soldering device 10, and the jig reflow device 11 are arranged in this order along the conveying direction of the optical soldering battery conveyor 12. The solder strip transfer device 9 continuously transfers the pressing and positioning clamp 14 from the output end of the clamp conveyor 13 to the input end of the light-welded battery conveyor 12; the jig reflow apparatus 11 transfers the press positioning jig 14, which has completed the pressing, from the photo-soldering battery conveyor 12 to the input end of the jig conveyor 13.
The conveyor 12 for the light-welded battery is a vacuum adsorption type belt conveyor. Four conveyor belts are arranged in the light welding battery conveyor 12. The distance between two outer conveyer belts of the four conveyer belts in the light welding battery conveyer 12 is larger than the width of the battery piece. Of the four conveyor belts in the light welding battery conveyor 12, two conveyor belts in the middle are used for conveying battery pieces; two conveyor belts located on the outer side are used to convey the press positioning jig 14. The pressing and positioning fixture 14 is used for pressing the welding strips on the battery piece, so that the welding strips are prevented from being displaced in the transportation process.
The vacuum adsorption type belt conveyor comprises a conveying frame, a transmission roller, a conveying belt, a conveying motor and a conveying adsorption plate. The two transmission rollers are respectively supported at two ends of the conveying frame. The conveyer belt is all walked around two driving pulley, and is passed through the take-up pulley tensioning. One or more conveyer belts; in the case of a plurality of conveyor belts, the conveyor belts are arranged at intervals in sequence. The conveying motor is fixed on the conveying frame, and the output shaft is fixed with one of the transmission rollers. The conveyer belt is provided with a plurality of waist-shaped holes which are sequentially arranged along the length direction of the conveyer belt. The conveying adsorption plate is fixed on the conveying frame. The conveying adsorption plate is positioned below the conveying section (namely the straight section on the upper side) of the conveying belt. The top surface of the conveying adsorption plate is provided with adsorption holes. The battery piece adsorption holes are aligned with the waist-shaped holes on the conveying belt. The conveying adsorption plate is internally provided with a cavity. The cavity is connected with the adsorption hole and the air outlet hole on the conveying adsorption plate. The air outlet on the conveying adsorption plate is connected with the air inlet of the air pump through a control air path. When the air pump is started, the conveying and adsorbing plate generates suction force on objects (battery pieces) conveyed on the conveying belt, and stability of the objects in the conveying process is guaranteed.
The jig conveyor 13 is a belt conveyor. The clamp conveyor 13 is provided with two conveyor belts which are arranged side by side and at intervals. And second side baffles are arranged on two sides of the top of the clamp conveyor 13. The distance between the two second side baffles is equal to the length of the clamp. The jig conveyor 13 is used to convey the jigs. The output end of the clamp conveyor 13 is provided with a first limit sensor. The first limit sensor adopts an infrared diffuse reflection sensor. The first limit sensor is directed towards the input end of the gripper conveyor 13. The first limit sensor is used for detecting the position of the clamp closest to the first limit sensor, so that the conveying and positioning of the clamp are realized (namely, when the first limit sensor detects the clamp, the clamp conveyor 13 stops conveying).
As shown in fig. 4 and 5, the pressing and positioning jig 14 includes an end fixing block 14-1, a connecting frame 14-2, a pressing wire 14-3, and a linkage pressing rod 14-4. The two ends of the connecting frame 14-2 and the two end fixing blocks 14-1 respectively form sliding pairs which slide along the thickness direction of the end fixing blocks 14-1. The two end fixing blocks 14-1 are fixed to each other. The link frame 14-2 can slide up and down. The opposite sides of the two end fixing blocks 14-1 are provided with grabbing grooves. The catching groove is used for providing a clamping force point for the solder strip transfer device 9 and the clamp reflow device 11. The connecting frame 14-2 is frame type, and the middle part is not shielded. Five pressing wires 14-3 which are sequentially arranged at intervals along the width direction of the connecting frame 14-2 are all fixed on the connecting frame 14-2. The two ends of the connecting frame 14-2 are provided with clamping grooves. Two linkage pressing rods 14-4 are respectively arranged on the two end fixing blocks 14-1. The middle part of the linkage pressing rod 14-4 and the corresponding end fixing block 14-1 form a revolute pair. One end of the linkage pressing rod 14-4 is provided with a clamping column. The clamping columns extend into corresponding clamping grooves on the connecting frame 14-2. The other end of the linkage pressing rod 14-4 is higher than the top surface of the end fixing block 14-1. When the end of the linkage pressing rod 14-4 far away from the connecting frame 14-2 is turned downwards, the prying connecting frame 14-2 slides upwards.
As shown in fig. 3, 6, 7 and 8, the solder strip feeding device 8 comprises a feeding frame 8-1, a feeding guide rail 8-2, a material pulling mechanism, a clamping and cutting mechanism and a solder strip unwinding mechanism 8-10. The feeding frame 8-1 is fixed with the light welding base 4. Two feeding guide rails 8-2 are respectively fixed on two sides of the top of the feeding frame 8-1. The material pulling mechanism comprises a material pulling sliding table 8-3, a first material supply driving assembly and a first mechanical clamping jaw 8-4. Two ends of the bottom of the material pulling sliding table 8-3 and the two feeding guide rails 8-2 form sliding pairs respectively. The first feeding driving assembly comprises a first feeding synchronous belt, a first feeding synchronous wheel and a first feeding driving motor 8-5. The two first feeding synchronous wheels are respectively supported at two ends of the feeding frame 8-1 and are connected through a first feeding synchronous belt. The material pulling sliding table 8-3 is fixed with the first material supply synchronous belt. The first feeding driving motor 8-5 is fixed on the feeding frame 8-1, and the output shaft is fixed with one first feeding synchronizing wheel. Four first mechanical clamping jaws 8-4 which are sequentially arranged are arranged on the material pulling sliding table 8-3. The first mechanical jaw 8-4 comprises a first jaw frame 8-4-1, a first clamping cylinder 8-4-2, a first connecting rod 8-4-3 and a first single jaw 8-4-4. The first claw frame 8-4-1 is fixed on the material pulling sliding table 8-3. The first clamping cylinder 8-4-2 is fixed on the first claw frame 8-4-1. The inner ends of the two first connecting rods 8-4-3 are hinged with the outer end of a piston rod of the first clamping cylinder 8-4-2, and the outer ends of the two first connecting rods are hinged with the inner ends of the two first single claws 8-4-4 respectively; the middle parts of the two first single claws 8-4-4 are hinged with the first claw frame 8-4-1. The outer ends of the two first single claws 8-4-4 are used for clamping the end of the welding strip.
As shown in fig. 6, 7 and 9, the clamp severing mechanism includes a clamp cutting slide 8-6, a second feed drive assembly, a severing assembly 8-7 and a second mechanical jaw 8-8. The two ends of the bottom of the clamping and cutting sliding table 8-6 and the two feeding guide rails 8-2 form sliding pairs respectively. The second feeding driving assembly comprises a second feeding synchronous belt, a second feeding synchronous wheel and a second feeding driving motor 8-9. The two second feeding synchronous wheels are respectively supported at two ends of the feeding frame 8-1 and are connected through a second feeding synchronous belt. The clamping and cutting sliding table 8-6 is fixed with a second feeding synchronous belt. The second feeding driving motor 8-9 is fixed on the feeding frame 8-1, and the output shaft is fixed with one of the second feeding synchronizing wheels. Four second mechanical clamping jaws 8-8 which are sequentially arranged are arranged on the clamping and cutting sliding table 8-6. The four second mechanical jaws 8-8 are aligned with the four first mechanical jaws 8-4, respectively. The second mechanical clamping jaw 8-8 comprises a second jaw frame 8-8-1, a second clamping cylinder 8-8-2, a fixed clamping block 8-8-3 and a movable clamping block 8-8-4. The second claw frame 8-8-1 is fixed on the clamping and cutting sliding table 8-6. The fixed clamping block 8-8-3 is fixed on the top of the second clamping frame. The middle part of the movable clamping block 8-8-4 is hinged with the fixed clamping block 8-8-3. The outer end of the movable clamping block 8-8-4 is provided with a horizontal clamping rod. In the turning process of the movable clamping block 8-8-4, the clamping rod can be contacted with the top surface of the fixed clamping block 8-8-3. The clamping rod is matched with the fixed clamping block 8-8-3 and can clamp the welding strip.
The severing assembly 8-7 is arranged between the first mechanical jaw 8-4 and the second mechanical jaw 8-8. The cutting assembly 8-7 comprises a cutting frame, an upper tool rest, a lower tool rest, an upper cutting cylinder 8-7-1 and a lower cutting cylinder 8-7-2. The cutting frame is fixed on the clamping and cutting sliding table 8-6. The upper tool rest and the lower tool rest are arranged up and down and form a sliding pair sliding along the vertical direction together with the cutting frame. The upper knife rest and the lower knife rest are both fixed with cutters. The two cutters correspond in position (are arranged up and down and staggered with each other), so that the function of shearing the welding strip can be realized. The upper cutting cylinder 8-7-1 and the lower cutting cylinder 8-7-2 are both fixed with the cutting frame. Piston rods of the upper cutting cylinder 8-7-1 and the lower cutting cylinder 8-7-2 are respectively fixed with the upper tool rest and the lower tool rest.
Four guide rings which are arranged in sequence are fixed on the feeding frame 8-1. The four guide rings are located on the side of the second mechanical jaw 8-8 remote from the first mechanical jaw 8-4 and are aligned with the four second mechanical jaws 8-8, respectively. The four solder strip unwinding mechanisms 8-10 are all installed on the photosolder base 4 and are used for continuously supplying four solder strips. The solder strip unwinding mechanisms 8-10 belong to the prior art and are not described in detail herein. In the working process, the welding strips released by the four welding strip unwinding mechanisms 8-10 respectively pass through the corresponding guide rings, pass through the space between the fixed clamping block 8-8-3 corresponding to the second mechanical clamping jaw 8-8 and the clamping rod, and pass through the space between the two cutting knives, and the end parts of the welding strips are clamped by the corresponding first mechanical clamping jaws 8-4; when the upper tool rest and the lower tool rest slide relatively, the welding strip is cut off. After the welding strip is cut off and taken away, the material pulling sliding table 8-3 and the clamping and cutting sliding table 8-6 slide relatively, so that the first mechanical clamping jaw 8-4 can clamp a new end face generated after the welding strip is cut off.
As shown in fig. 3, 10 and 11, the solder strip transfer device 9 includes a first traverse mechanism 9-1, a first lifting mechanism and a solder strip clamp synchronous gripping mechanism. The first transverse moving mechanism 9-1 comprises a first transverse moving frame, a first transverse moving guide rail, a first transverse moving sliding table and a first transverse moving driving assembly. The first traverse frame is fixed on the photosolder base 4. The first transverse moving guide rail is fixed on the first transverse moving frame and is arranged along the width direction of the light welding base 4; the first transverse sliding table and the first transverse sliding guide rail form a sliding pair. The first transverse moving driving assembly comprises a first transverse moving synchronous belt, a first transverse moving synchronous wheel and a first transverse moving driving motor. The two first transverse moving synchronous wheels are respectively supported at two ends of the first transverse moving frame and are connected through the first transverse moving synchronous belt. The first transverse sliding table is fixed with the first transverse sliding synchronous belt. The first transverse moving driving motor is fixed on the first transverse moving frame, and the output shaft is fixed with one of the first transverse moving synchronous wheels.
The first lifting mechanism comprises a first lifting frame 9-2, a first lifting screw 9-3, a first lifting motor 9-4 and a first lifting sliding table. The first lifting frame 9-2 is fixed with the first transverse moving slide block; a first lifting screw 9-3 which is vertically arranged is supported on the first lifting frame 9-2. The first lifting motor 9-4 is fixed on the first lifting frame 9-2, and the output shaft is fixed with the first lifting screw rod 9-3. The first lifting sliding table and the first lifting frame 9-2 form a sliding pair, and the first lifting sliding table and the first lifting screw rod 9-3 form a screw pair.
The synchronous grabbing mechanism of the welding strip clamp comprises a first grabbing support 9-5, a first welding strip feeding adsorption assembly, a second welding strip feeding adsorption assembly and a clamp clamping assembly. The first grabbing bracket 9-5 is fixed on the first lifting sliding table. The clamp gripping assembly comprises two single-sided jaws 9-6 and two single-sided pushers 9-11. The single-side clamping jaws 9-6 are respectively arranged at two sides of the first grabbing bracket 9-5. The single-side clamping jaw 9-6 comprises a first grabbing cylinder, a second connecting rod and a first hook jaw 9-6-1. The middle part of the first hook claw 9-6-1 is hinged with the first grabbing bracket 9-5 respectively. The first grabbing cylinder is fixed with the first grabbing bracket 9-5. One end of the second connecting rod is hinged with a piston rod of the first grabbing cylinder, and the other end of the second connecting rod is hinged with one end of the first hook claw 9-6-1. When the first grabbing cylinders in the two single-side clamping jaws 9-6 are all pushed out, the ends, far away from the second connecting rod, of the two first hook claws 9-6-1 are turned downwards, at the moment, the distance between the two first hook claws 9-6-1 is smaller than the length of the pressing positioning fixture 14, so that the two first hook claws 9-6-1 can respectively extend into grabbing grooves of two end fixing blocks 14-1 on the pressing positioning fixture 14, and the pressing positioning fixture 14 is clamped.
Two single-sided pressure elements 9-11 are arranged centrally on the first gripper bracket 9-5 and between the two single-sided gripping jaws 9-6. The single-side pushing member 9-11 includes a pushing cylinder and a pushing block. The pushing cylinder is fixed on the first grabbing bracket 9-5, and the piston rod is arranged downwards. A push block is fixed on the piston rod of the piston rod. The positions of the two push blocks correspond to the two end fixing blocks 14-1 on the pressing and positioning fixture 14 clamped by the two single-side clamping jaws 9-6 respectively. When the two push blocks are pushed out, the linkage pressing rods 14-4 on the two end fixing blocks 14-1 are respectively pushed to turn over, so that the connecting frame 14-2 on the pressing positioning fixture 14 moves upwards.
As shown in fig. 10, 11 and 12, the first solder strip loading adsorption assembly is located between the two single-side pushing elements 9-11, and comprises a first pushing-down cylinder 9-7 and an insertion adsorption block 9-8. The first push-down cylinder 9-7 is fixed on the first grabbing bracket 9-5, and the piston rod is arranged downwards. The piston rod of the piston rod is fixed with the interpenetration adsorption blocks 9-8. The penetrating adsorption block 9-8 is composed of a base plate 9-8-1 and six vertical adsorption plates 9-8-2 which are integrally formed. The tops of the six vertical adsorption plates 9-8-2 which are vertically arranged are connected with the base plate 9-8-1. Six vertical adsorption plates 9-8-2 are arranged at equal intervals in sequence. The sum of the width of the vertical adsorption plate 9-8-2 and the distance between two adjacent vertical adsorption plates 9-8-2 is equal to the center distance of two adjacent pressing wires 14-3 in the pressing and positioning fixture 14. The distance between two adjacent vertical adsorption plates 9-8-2 is larger than the diameter of the pressing wire 14-3; so that the six vertical adsorption plates 9-8-2 can pass through the gaps of the pressing wires 14-3 on the pressing and positioning fixture 14. The bottom of each vertical adsorption plate 9-8-2 is provided with four first adsorption grooves 9-8-3 which are arranged at equal intervals in sequence. The bottoms of the four first adsorption grooves 9-8-3 are provided with first adsorption ports. The center distance between two adjacent first adsorption grooves 9-8-3 is equal to the center distance between two adjacent guide rings on the welding strip feeding device 8. The four first adsorption grooves 9-8-3 on one vertical adsorption plate 9-8-2 can respectively adsorb four cut welding strips on the welding strip feeding device 8. The base plate 9-8-1 and each vertical adsorption plate 9-8-2 are internally provided with air passages which are mutually connected, and the base plate 9-8-1 is provided with an air extraction opening. The air pumping port on the base plate 9-8-1 is connected with an air pump through a control air path. Four second adsorption grooves on one vertical adsorption plate 9-8-2 can respectively adsorb four cut-off welding strips on the welding strip feeding device 8.
The second welding strip feeding adsorption assembly is located on one side, away from the input end of the clamp conveyor, of the first welding strip feeding adsorption assembly. The second welding strip feeding adsorption component comprises a second push-down cylinder 9-9 and a horizontal adsorption plate 9-10. The second push-down cylinder 9-9 is fixed on the first grabbing bracket 9-5, and the piston rod is arranged downwards. The piston rod of the piston rod is fixed with the horizontal adsorption plates 9-10. The bottom of each horizontal adsorption plate 9-10 is provided with four second adsorption grooves which are arranged at equal intervals in sequence. The second adsorption groove is strip-shaped, and the length direction of the second adsorption groove is arranged along the conveying direction of the light-welded battery conveyor. The four second adsorption grooves on the horizontal adsorption plate 9-10 are respectively aligned with the four first adsorption grooves 9-8-3 on the vertical adsorption plate 9-8-2. A plurality of second adsorption ports are formed in the second adsorption groove. Air passages connected with the second adsorption ports are arranged in the horizontal adsorption plates 9-10. The horizontal adsorption plates 9-10 are provided with air extraction ports. The air pumping ports on the horizontal adsorption plates 9-10 are connected with the air pump through a control air path. When the air pump pumps air from the air pumping ports of the substrate 9-8-1 and the horizontal absorption plate 9-10, the first absorption port on the vertical absorption plate 9-8-2 and the second absorption port on the horizontal absorption plate 9-10 generate suction.
As shown in fig. 3 and 13, the light welding apparatus 10 includes a welding stand 10-1, a light welding lateral adjustment assembly, a longitudinal adjustment assembly, a turnover assembly, a mounting stand 10-2, a preheating unit 10-3, and a light welding unit 10-4. The welding holder 10-1 is fixed on the photosolder base 4. The light welding transverse adjusting assembly comprises a transverse adjusting slide rail 10-5, a transverse adjusting frame 10-6, a transverse adjusting bolt 10-7 and a locking block 10-8. The transverse adjusting slide rail 10-5 is fixed on the welding frame 10-1. The transverse adjusting frame 10-6 and the transverse adjusting slide rail 10-5 form a sliding pair. The horizontally arranged transverse adjusting bolt 10-7 and the welding frame 10-1 form a rotation pair, and the horizontally arranged transverse adjusting bolt and the transverse adjusting frame 10-6 form a screw pair. The transverse adjustment of the transverse adjusting frame 10-6 can be realized by rotating the transverse adjusting bolt 10-7. The transverse adjusting bolt 10-7 is locked by a locking block 10-8. The locking block 10-8 consists of a spanner bolt and a clamping block with a deformation joint. The spanner bolt can extrude the deformation joint by rotating, so that the locking block 10-8 clamps the transverse adjusting bolt 10-7.
The longitudinal adjusting assembly comprises a longitudinal adjusting slide rail, a longitudinal adjusting frame 10-9 and a longitudinal adjusting bolt 10-10. The vertical adjusting slide rail is fixed with the horizontal adjusting frame 10-6. The longitudinal adjusting frame 10-9 and the longitudinal adjusting slide rail form a sliding pair. The top of the longitudinal adjusting frame 10-9 is provided with an adjusting threaded hole. The longitudinal adjusting bolt 10-10 and the adjusting threaded hole on the longitudinal adjusting frame 10-9 form a screw pair and abut against the transverse adjusting frame 10-6. The height of the longitudinal adjusting frame 10-9 can be adjusted by rotating the longitudinal adjusting bolt 10-10. The overturning assembly comprises an overturning frame 10-11 and an overturning cylinder 10-12. The roll-over stand 10-11 is hinged with the longitudinal adjusting stand 10-9. The end part of the cylinder body of the overturning cylinder 10-12 is hinged with a longitudinal adjusting frame 10-9. The outer end of a piston rod of the overturning cylinder 10-12 is hinged with the overturning frame 10-11. When the overturning cylinder 10-12 is pushed out, the overturning frame 10-11 overturns. The preheating unit 10-3 and the light welding unit 10-4 are both arranged on the roll-over stand 10-11. The preheating unit 10-3 is positioned between the light welding unit 10-4 and the synchronous grabbing mechanism of the welding strip clamp. In the working state, the preheating unit 10-3 and the light welding unit 10-4 are both arranged downwards.
The preheating unit 10-3 and the light welding unit 10-4 are identical in structure and respectively comprise a lampshade, a heating lamp tube and a light welding radiator 10-13. The light-welded heat sink 10-13 is mounted on top of the lamp housing. The heating lamp tube is arranged in the lampshade. The preheating unit 10-3 and the light welding unit 10-4 weld the battery plate and the welding strip together by heating the battery plate and the welding strip.
As shown in fig. 3 and 14, the jig reflow apparatus 11 includes a second traverse mechanism 11-1, a second elevating mechanism, and a jig gripping mechanism. The second transverse moving mechanism 11-1 comprises a second transverse moving frame, a second transverse moving guide rail, a second transverse moving sliding table and a second transverse moving driving assembly. The second traverse frame is fixed on the photosolder base 4. The second traverse guide rail is fixed on the second traverse frame and arranged along the width direction of the light welding base 4; the second transverse sliding table and the second transverse sliding guide rail form a sliding pair. The second transverse moving driving assembly comprises a second transverse moving synchronous belt, a second transverse moving synchronous wheel and a second transverse moving driving motor. And the two second transverse moving synchronous wheels are respectively supported at two ends of the second transverse moving frame and are connected through the second transverse moving synchronous belt. The second transverse sliding table is fixed with the second transverse sliding synchronous belt. The second transverse moving driving motor is fixed on the second transverse moving frame, and the output shaft is fixed with one of the second transverse moving synchronous wheels.
The second lifting mechanism comprises a second lifting frame 11-2, a backflow lifting cylinder 11-3 and a second lifting sliding table 11-4. The second lifting frame 11-2 is fixed with the second transverse moving slide block; and a second lifting screw rod which is vertically arranged is supported on the second lifting frame 11-2. The backflow lifting cylinder 11-3 is fixed on the second lifting frame 11-2, and the piston rod is fixed with the second lifting sliding table 11-4.
The clamp grabbing mechanism comprises a second grabbing bracket 11-5, two second grabbing air cylinders 11-6 and two clamping jaw assemblies. And a second grabbing bracket 11-5 is fixed on the second lifting sliding table 11-4. The clamping jaw assembly comprises a turnover strip 11-8 and two second hook claws 11-7. The two second hook claws 11-7 and the turning strips 11-8 form sliding pairs and are positioned by fastening screws. The two clamping jaw assemblies are respectively arranged at two sides of the second grabbing bracket 11-5. The cylinder bodies of the two second grabbing cylinders 11-6 are hinged with the second grabbing bracket 11-5. Piston rods of the two second grabbing cylinders 11-6 are respectively hinged with the two turning strips 11-8. When the two second grabbing cylinders 11-6 are pushed out, the distance between the second hook claws 11-7 in the two clamping jaw assemblies is smaller than the length of the pressing and positioning fixture 14, so that the two second hook claws 11-7 can respectively extend into grabbing grooves of two end fixing blocks 14-1 on the pressing and positioning fixture 14, and the pressing and positioning fixture 14 is clamped.
The function of the final-weld module 2 is: welding the welding strip by a light heating welding mode, and increasing the welding temperature by using higher power if the welding quality is ensured; however, since the photo-heating welding is global heating, the cell plate needs to bear higher temperature in the welding process, which causes greater attenuation to the cell plate and is not beneficial to the production of high-quality cell strings; therefore, the invention only uses light heating to carry out preliminary connection; after the light heating, the pressure welding is carried out through the final welding module 2, so that the welding reliability is improved.
As shown in fig. 2 and 15, the final welding module 2 includes a final welding base 5, a final welding conveyor 14, a final welding push-up device, and six pressure welding devices 15. The final welding pushing and lifting device comprises a pushing and lifting frame 16 and a pushing and lifting electric cylinder 17. The push-up stand 16 and the finish welding base 5 constitute a sliding pair that slides in the vertical direction. The pushing and lifting electric cylinder 17 is fixed at the bottom of the final welding base 5, and the pushing and lifting rod is fixed with the pushing and lifting frame 16. The input end of the finish weld conveyor 14 is located between the output ends of the conveyor 12 of the photosolder cells in the two photosolder modules 1. The final weld conveyor 14 is mounted on a lift frame 16. The final welding conveyor 14 is a vacuum adsorption type belt conveyor. Two conveyor belts are arranged in the final welding conveyor 14, and the two conveyor belts are arranged side by side and at intervals.
As shown in fig. 15 and 16, six bonding devices 15 are mounted on the finish welding base 5, and are arranged in series along the conveying direction of the finish welding conveyor 14. The pressure welding device 15 comprises a pressure welding base 15-1, a pressure welding transverse adjusting assembly, a pressure welding support 15-2, a pressure welding lifting mechanism, a pressure welding support plate 15-3 and a welding mechanism 15-4. The pressure welding base 15-1 is fixed on the final welding base 5. The bottom of the pressure welding bracket 15-2 and the top surface of the pressure welding base 15-1 form a sliding pair. The pressure welding transverse adjusting assembly comprises an adjusting seat 15-5, an adjusting screw rod 15-6 and an adjusting nut block 15-7. Two adjusting seats 15-5 are fixed on the pressure welding base 15-1. The adjusting screw 15-6 and the two adjusting seats 15-5 form a revolute pair. The adjusting nut block 15-7 is fixed at the bottom of the pressure welding bracket 15-2 and forms a screw pair with the adjusting screw 15-6. The transverse position of the adjusting seat 15-5 can be adjusted by rotating the adjusting screw rod 15-6. The pressure welding support plate 15-3 is fixed on the pressure welding bracket 15-2. The pressure welding support plate 15-3 is located between the two conveyor belts of the final welding conveyor 14.
In the initial state, the top surface of the pressure welding support plate 15-3 is lower than the top surfaces of the two conveying belts in the final welding conveyor 14; after the lifting electric cylinder 17 drives the final welding conveyor 14 to lower, the top surfaces of the two conveying belts in the final welding conveyor 14 are lower than the top surfaces of the pressure welding supporting plates 15-3, at the moment, the battery string is supported by the pressure welding supporting plates 15-3, and therefore the final welding conveyor is prevented from being damaged by high temperature generated by pressure welding.
The pressure welding lifting mechanism comprises a pressure welding lifting screw 15-8, a pressure welding lifting motor 15-9 and a pressure welding lifting sliding table 15-10. And a pressure welding lifting screw 15-8 which is vertically arranged is supported on the pressure welding bracket 15-2. The pressure welding lifting motor 15-9 is fixed on the pressure welding bracket 15-2, and an output shaft is fixed with the pressure welding lifting screw 15-8. The pressure welding lifting sliding table 15-10 and the pressure welding bracket 15-2 form a sliding pair, and form a screw pair together with the pressure welding lifting screw 15-8.
As shown in fig. 16 and 17, the welding mechanism 15-4 is located directly above the pressure welding support plate 15-3, and includes a final-weld heat sink 15-4-1, a diaphragm replacement assembly, and four welding units. The four welding units are arranged in sequence, and the arrangement direction is perpendicular to the conveying direction of the final welding conveyor 14. The welding unit comprises a single support 15-4-2, an X-axis adjusting assembly, a Y-axis adjusting assembly, an air spring 15-4-3, a pressure welding head 15-4-4 and a heating rod. The X-axis adjusting assembly comprises an X-axis mounting strip 15-4-5 and an X-axis bolt 15-4-6. The two ends of the X-axis mounting strip 15-4-5 are provided with rotating short shafts. The rotating short shafts at the two ends of the X-axis mounting strip 15-4-5 and the pressure welding lifting sliding table 15-10 form a rotating pair. Four X-axis bolts 15-4-6 are arranged at two ends of the rotary short shaft in a group of two. The vertically arranged X-axis bolt 15-4-6 is in threaded connection with a threaded through hole formed in the pressure welding lifting sliding table 15-10. The bottom end of the X-axis bolt 15-4-6 props against the top surface of the X-axis mounting strip 15-4-5. Two X-axis bolts 15-4-6 positioned at the same end of the X-axis mounting strip 15-4-5 are respectively positioned at two sides of the central axis of the rotating short shaft. Therefore, the X-axis mounting bar 15-4-5 can be rotated by rotating the four X-axis bolts 15-4-6, so that the X-axis rotation adjustment of the welding unit is realized.
The single bracket 15-4-2 and the X-axis mounting strip 15-4-5 form a sliding pair. The shell of the air spring 15-4-3 is fixed with the X-axis mounting strip 15-4-5, and the elastic telescopic rod is fixed with the single bracket 15-4-2. The Y-axis adjusting assembly comprises a Y-axis mounting strip 15-4-7, a deformation division strip 15-4-8 and a Y-axis bolt 15-4-9. The Y-axis mounting strip 15-4-7 is fixed at the bottom of the single bracket 15-4-2. The pressure welding head 15-4-4 is connected with the Y-axis mounting strip 15-4-7 through a bolt. The length direction of the bonding tool 15-4-4 is parallel to the conveying direction of the final welding conveyor 14. A deformation parting strip 15-4-8 is padded between the pressure welding head 15-4-4 and the Y-axis mounting strip 15-4-7. The top and the bottom of the deformation parting strip 15-4-8 are both provided with a plurality of deformation grooves. The top of the pressure welding head 15-4-4 is provided with a plurality of deformation joints. The Y-axis bolts 15-4-9 are in threaded connection with threaded through holes formed in the Y-axis mounting strips 15-4-7, penetrate through the deformed parting strips 15-4-8 and then abut against the pressure welding heads 15-4-4. Each deformation joint on the pressure welding head 15-4-4 corresponds to two Y-axis bolts 15-4-9 respectively. Two Y-axis bolts 15-4-9 corresponding to the deformation joint respectively prop against two sides of the deformation joint. By rotating the Y-axis bolts 15-4-9, the pressure welding head 15-4-4 can be turned over in a small range, so that the bottom surface of the pressure welding head 15-4-4 is ensured to be horizontal. The X-axis adjusting assembly and the Y-axis adjusting assembly are matched and adjusted together, so that the levelness of the pressure welding head 15-4-4 can be greatly improved, and the battery plate and the welding strip can be uniformly pressed in the pressure welding process. A heating rod is arranged in the pressure welding head 15-4-4. The heating rod is used for raising the temperature of the pressure welding head 15-4-4 to realize the welding function. The final-welded heat sink 15-4-1 is fixed on top of the single bracket 15-4-2 of one of the welded units.
As shown in fig. 16 and 18, the membrane replacing assembly includes a membrane support 15-4-10, an unwinding reel 15-4-11, a recycling reel 15-4-12, a rolled membrane (not shown), and an unwinding driving assembly 15-4-13. The diaphragm support 15-4-10 is fixed with the pressure welding lifting sliding table 15-10. The winding out drum 15-4-11 and the recovery drum 15-4-12 are respectively supported at two ends of the diaphragm support 15-4-10 and are respectively positioned at two sides of the four pressure welding heads 15-4-4. Two ends of the coiled membrane are respectively coiled on the winding drum 15-4-11 and the recovery drum 15-4-12. The part of the coiled membrane between the coil outlet cylinder 15-4-11 and the recovery cylinder 15-4-12 bypasses the bottom of the four press welding heads 15-4-4. The unreeling driving assembly 15-4-13 comprises an unreeling synchronous wheel, an unreeling synchronous belt and an unreeling motor. The unreeling motor is fixed on the diaphragm support 15-4-10. The two unwinding synchronous wheels are respectively fixed with the recovery drum 15-4-12 and an output shaft of an unwinding motor and are connected through an unwinding synchronous belt.
The coiled membrane is used for separating the final pressure head from the battery plate, so that the damage to the battery plate in the welding process is reduced, and the quality of the produced battery string is improved. The diaphragm below the final pressure head is aged after being subjected to pressure welding for several times, and at the moment, a new diaphragm can be pulled out from the winding drum 15-4-11 to replace the aged diaphragm by rotating the recovery drum 15-4-12.
As shown in fig. 2 and 19, the battery string transfer module 3 includes a third traverse mechanism, a third elevating mechanism, and a battery string suction assembly. The third traverse mechanism comprises a third traverse frame 18, a third traverse guide rail, a third traverse sliding table and a third traverse driving assembly. The third traverse frame 18 is fixed to the finish welding base 5. The third traverse guide rail is fixed on the third traverse frame 18 and arranged along the width direction of the light-welding base 4; the third transverse sliding table and the third transverse sliding guide rail form a sliding pair. The third traverse driving assembly includes a third traverse timing belt, a third traverse timing wheel, and a third traverse driving motor 19. The two third traverse synchronizing wheels are respectively supported at two ends of the third traverse frame 18 and are connected through a third traverse synchronizing belt. And the third transverse sliding table is fixed with the third transverse sliding synchronous belt. A third traverse driving motor 19 is fixed to the third traverse frame 18, and an output shaft is fixed to one of the third traverse synchronizing wheels.
The third lifting mechanism comprises a third lifting frame 20, a lifting electric cylinder 21 and a third lifting sliding table 22. The third lifting frame 20 is fixed with the third transverse moving slide block; a third vertically arranged lifting screw is supported on the third lifting frame 20. The lifting electric cylinder 21 is fixed on the third lifting frame 20, and the push-out rod is fixed with the third lifting sliding table 22. The battery string extraction assembly includes a suction cup mounting stem 23 and a pneumatic suction cup 24. The middle part of the sucker mounting rod 23 is fixed with the third lifting slipway 22. The length direction of the suction cup mounting rod 23 is parallel to the conveying direction of the conveyor for the photostable battery. A plurality of suction cup mounting pieces 23 are fixed to the bottom of the suction cup mounting rod 23. The length direction of the suction cup mounting pieces 23 is perpendicular to the length direction of the suction cup mounting rods 23. Pneumatic suction cups 24 are mounted at both ends of each suction cup mounting piece 23. Each pneumatic suction cup 24 is used to suck the battery string that is initially welded together. The suction cup mounting bar 23 can be moved over the output of both the bare cell conveyors and also over the output of the finish weld conveyor 14.
As a preferred solution;
the output end of the final welding module 2 is also provided with a battery string output module. The battery string output module adopts one of the following two schemes.
①, a discharging conveyor is arranged, and the input end of the discharging conveyor is butted with the output end of the final welding conveyor.
②, arranging a discharge conveyor, extending the final welding conveyor to enable the final welding conveyor to be provided with a discharge section, placing a battery string for completing welding on the discharge section of the final welding conveyor, arranging the discharge conveyor and the discharge section of the final welding conveyor side by side, and arranging a finished product transfer mechanism with the same structure as the battery string transfer module 3 for transferring the finished battery string output from the final welding conveyor to the discharge conveyor for outputting.
Each motor is connected with the controller through a motor driver. The signal output lines of all the sensors are connected with the controller. And the control interface of each control air path is connected with the controller. The control gas circuit is a reversing valve or an on-off valve. The controller adopts PLC.
The welding method of the two-stage welding type IBC solar cell string welding device comprises the following specific steps:
step one, placing a box body filled with battery pieces on the two feeding trays 7. The two feeding robots 6 respectively grab the battery pieces one by one from the corresponding feeding tray 7 and place the battery pieces on the corresponding light welding battery conveyor 12 of the light welding module 1.
And step two, two light-welded battery conveyors 12 in the two light-welded modules 1 continue to convey the battery pieces, and when one battery piece reaches the position below the welding strip transfer device 9, the corresponding light-welded battery conveyor 12 stops conveying. The jig conveyor 13 conveys one press-positioning jig 14 to the lower side of the solder ribbon transfer device 9 as a working press-positioning jig 14.
Meanwhile, four first mechanical clamping jaws 8-4 in the welding strip feeding device 8 respectively clamp the end parts of four welding strips; the material pulling sliding table 8-3 and the clamping and cutting sliding table 8-6 reversely slide, so that the length of the welding strip between the first mechanical clamping jaw 8-4 and the cutter in the cutting assembly 8-7 reaches a preset value. The four second mechanical clamping jaws 8-8 respectively clamp the corresponding solder strips. The cutting assembly 8-7 cuts off the four solder strips. The ends of the four solder strips remote from the first mechanical clamping jaw 8-4 are located directly below the working pressing and positioning fixture 14.
And step three, the welding strip clamp synchronous grabbing mechanism in the welding strip transfer device 9 moves right above the four welding strips, and the first lifting mechanism drives the welding strip clamp synchronous grabbing mechanism to move downwards, so that the first hook claws 9-6-1 on the two single-side clamping jaws 9-6 respectively reach two ends of the working pressing and positioning clamp 14. The two unilateral clamping jaws 9-6 respectively hook two ends of the working pressing positioning clamp 14; thereafter, the two single-sided pushers 9-11 are pushed out, so that the link frame 14-2 in the work press positioning jig 14 is lifted upward.
Pushing out by the first downward pushing cylinder 9-7 and the second downward pushing cylinder 9-9; after each vertical adsorption plate 9-8-2 on the interpenetration adsorption block 9-8 passes through the gap between each pressing wire 14-3 on the working pressing positioning fixture 14, each first adsorption groove 9-8-3 at the bottom of the vertical adsorption plate 9-8-2 is respectively contacted with the corresponding welding strip. And the second adsorption grooves at the bottoms of the horizontal adsorption plates 9-10 are respectively contacted with the corresponding welding strips.
Step five, inserting the adsorption blocks 9-8 and the horizontal adsorption plates 9-10 to adsorb the four welding strips; the four first mechanical jaws 8-4 are released.
Sixthly, the welding strip transfer device 9 carries the working pressing positioning fixture 14 and the four welding strips to be right above the battery piece of the light welding battery conveyor, and places the welding strips and the working pressing positioning fixture 14 on the battery piece; the working pressing positioning fixture 14 is positioned above one battery piece, and the welding strip covers the two battery pieces. The two single-side pushing pieces 9-11 are retracted, so that the connecting frame 14-2 in the working pressing positioning clamp 14 moves downwards; the pressing wire 14-3 on the working pressing positioning clamp 14 presses one end of the four welding strips, so that the welding strips are guaranteed not to move in the conveying process.
The portion of the solder ribbon not pressed by the working pressing and positioning jig 14 is pressed during the next transportation of the solder ribbon and the pressing and positioning jig 14. Carrying the welding strips and the pressing positioning clamp 14 twice; the positions of the four welding strips in the previous conveying are staggered with those of the four welding strips in the next conveying; a battery string as shown in fig. 1 is formed. One battery string includes six or twelve battery cells. The battery piece at the head end and the battery piece at the output end are respectively provided with four welding strips which only cover one battery piece; the eight welding strips only covering one battery piece are also conveyed by the welding strip transfer device 9; when four short solder strips of the first-end electric cell piece are placed, the solder strip transfer device 9 does not simultaneously carry and press the positioning fixture 14.
Seventhly, the battery pieces with the welding strips placed pass through the position right below the light welding device 10 under the conveying of the light welding battery conveyor; the preheating unit 10-3 and the light welding unit 10-4 are internally provided with heating lamp tubes for heating the battery pieces and the welding strips, so that the welding strips and the battery pieces are preliminarily welded together; at the moment, in order to reduce the damage to the battery piece; the connection of the solder strip and the cell is not entirely reliable.
And step eight, when the pressing and positioning clamp 14 on the light-welding battery conveyor 12 reaches the position below the clamp reflow device 11, the clamp grabbing mechanism in the clamp reflow device 11 clamps the pressing and positioning clamp 14 pressed on the battery piece, and conveys the battery piece to the input end of the clamp conveyor 13 to wait for the next time to be conveyed to the light-welding battery conveyor 12 by the welding strip transfer device 9.
Step nine, when the battery string subjected to the primary welding reaches the position below the battery string transfer module 3, if the final welding module 2 is not in welding, the battery string suction assembly in the battery string transfer module 3 sucks up the battery string and conveys the battery string to the final welding conveyor 14 of the final welding module 2. Because the welding speed of the final welding module 3 is faster than that of the optical welding module 1, the invention realizes rhythm synchronization by matching two optical welding modules 1 and one final welding module 3.
Step ten, the final welding conveyor 14 conveys the battery string to six pressure welding devices 15. If the battery string contains six battery pieces, the six battery pieces are respectively positioned right below the welding mechanism 15-4 in the six pressure welding devices 15. If the battery string contains twelve battery pieces, the twelve battery pieces are grouped into a group in pairs, and the six groups of battery pieces are respectively positioned right below the welding mechanism 15-4 in the six pressure welding devices 15. The lifting electric cylinder 17 drives the lifting frame 16 to slide downwards, so that the final welding conveyor 14 moves downwards to be separated from each battery piece. Each cell is supported by each pressure welding support plate 15-3.
Eleventh, the pressure welding heads 15-4-4 in the six welding mechanisms 15-4 are heated; the six welding mechanisms 15-4 are driven by the corresponding pressure welding lifting mechanisms to move downwards respectively, so that the welding strips on each battery string are pressed by the pressure welding heads 15-4-4, the welding strips and the battery pieces are further welded together, and the welding reliability is ensured; because the cell is heated locally in the pressure welding process, the cell is less damaged.
Claims (10)
1. The two-stage welding type IBC solar cell string welding device comprises a light welding module (1), a final welding module (2), a cell string transfer module (3), a light welding base (4) and a final welding base (5); the method is characterized in that: the optical welding base (4) and the final welding base (5) are fixed together; the final welding module (2) is arranged on the final welding base (5); the battery string transfer module (3) is arranged at the output end of the photosolder base (4) and is used for transferring the battery string output from the photosolder module (1) to the final welding module (2);
the optical welding module (1) comprises a welding strip feeding device (8), a welding strip transferring device (9), an optical welding device (10), a clamp backflow device (11), an optical welding battery conveyor (12), a clamp conveyor (13) and a pressing positioning clamp (14); the clamp conveyor (13) is positioned on one side of the light-welded battery conveyor (12); the welding strip feeding device (8) is positioned below the output end of the clamp conveyor (13); the welding strip transfer device (9) is positioned above the input end of the light welding battery conveyor (12) and the output end of the clamp conveyor (13); the solder strip transfer device (9), the optical welding device (10) and the clamp reflow device (11) are sequentially arranged along the conveying direction of the optical welding battery conveyor (12); a heating lamp tube is arranged in the optical welding device (10); the heating lamp tube irradiates the battery piece and the welding strip for welding; the solder strip transfer device (9) transfers the pressing and positioning clamp (14) from the output end of the clamp conveyor (13) to the input end of the photosolder battery conveyor (12); the clamp reflow device (11) transfers the pressing and positioning clamp (14) which completes pressing from the light-welded battery conveyor (12) to the input end of the clamp conveyor (13); the light-welding battery conveyor (12) adopts a vacuum adsorption type belt conveyor; four conveying belts are arranged in the light welding battery conveyor (12); the distance between two outer-side conveyer belts of the four conveyer belts in the light welding battery conveyer (12) is larger than the width of the battery piece;
the pressing positioning clamp (14) comprises an end fixing block (14-1), a connecting frame (14-2), a pressing wire (14-3) and a linkage pressing rod (14-4); two ends of the connecting frame (14-2) and the two end fixing blocks (14-1) respectively form sliding pairs which slide along the thickness direction of the end fixing blocks (14-1); the two end fixing blocks (14-1) are fixed with each other; the opposite sides of the two end fixing blocks (14-1) are provided with grabbing grooves; a plurality of pressing wires (14-3) which are sequentially arranged at intervals along the width direction of the connecting frame (14-2) are all fixed on the connecting frame (14-2); the two ends of the connecting frame (14-2) are provided with clamping grooves; the two end fixing blocks (14-1) are provided with linkage pressing rods (14-4); the middle part of the linkage pressing rod (14-4) and the corresponding end fixing block (14-1) form a revolute pair; one end of the linkage pressing rod (14-4) extends into the clamping groove on the connecting frame (14-2); the other end of the linkage pressing rod (14-4) is higher than the top surface of the end fixing block (14-1);
the welding strip feeding device (8) comprises a feeding frame (8-1), a feeding guide rail (8-2), a material pulling mechanism, a clamping and cutting mechanism and a welding strip unwinding mechanism (8-10); the feeding frame (8-1) is fixed with the light welding base (4); the feeding guide rail (8-2) is fixed on the feeding frame (8-1); the material pulling mechanism comprises a material pulling sliding table (8-3), a first material supply driving assembly and a first mechanical clamping jaw (8-4); the material pulling sliding table (8-3) and the material feeding guide rail (8-2) form a sliding pair; the material pulling sliding table (8-3) is driven by a first material supply driving assembly; four first mechanical clamping jaws (8-4) which are sequentially arranged are arranged on the material pulling sliding table (8-3);
the clamping and cutting mechanism comprises a clamping and cutting sliding table (8-6), a second feeding driving assembly, a cutting assembly (8-7) and a second mechanical clamping jaw (8-8); the clamping and cutting sliding table (8-6) and the two feeding guide rails (8-2) form a sliding pair; the clamping and cutting sliding table (8-6) is driven by a second feeding driving assembly; four second mechanical clamping jaws (8-8) which are sequentially arranged are arranged on the clamping and cutting sliding table (8-6); the four second mechanical clamping jaws (8-8) are respectively aligned with the four first mechanical clamping jaws (8-4); the cutting component (8-7) is arranged between the first mechanical clamping jaw (8-4) and the second mechanical clamping jaw (8-8);
the welding strip transfer device (9) comprises a first transverse moving mechanism (9-1), a first lifting mechanism and a welding strip clamp synchronous grabbing mechanism; the first transverse moving mechanism (9-1) is arranged on the light welding base; the first lifting mechanism is arranged on the first transverse moving mechanism (9-1); the synchronous grabbing mechanism of the welding strip clamp is arranged on the first lifting mechanism; the synchronous grabbing mechanism of the welding strip clamp comprises a first grabbing bracket (9-5), a first welding strip feeding adsorption assembly, a second welding strip feeding adsorption assembly and a clamp clamping assembly; the clamp clamping assembly comprises two single-side clamping jaws (9-6) and two single-side pushing pieces (9-11); the single-side clamping jaws (9-6) are respectively arranged at two sides of the first grabbing bracket (9-5); two unilateral clamping jaws (9-6) respectively clamp two ends of the pressing positioning clamp (14); two single-side pushing pieces (9-11) are arranged on the first grabbing bracket (9-5) in a centering way and are positioned between the two single-side clamping jaws (9-6); two single-side pushing and pressing pieces (9-11) respectively push and press linkage pressing rods (14-4) on the two end fixing blocks (14-1);
the first welding strip feeding adsorption assembly is positioned between the two single-side pushing pieces (9-11) and comprises a first pushing cylinder (9-7) and an inserting adsorption block (9-8); the penetrating adsorption block (9-8) moves up and down through the first pushing-down cylinder (9-7); the interpenetration adsorption block (9-8) consists of a base plate (9-8-1) and a plurality of vertical adsorption plates (9-8-2) which are integrally formed; the tops of the vertical adsorption plates (9-8-2) which are vertically arranged are connected with the base plate (9-8-1); all the vertical adsorption plates (9-8-2) are arranged at equal intervals in sequence; the sum of the width of the vertical adsorption plate (9-8-2) and the distance between two adjacent vertical adsorption plates (9-8-2) is equal to the center distance of two adjacent pressing wires (14-3) in the pressing and positioning fixture (14); the distance between two adjacent vertical adsorption plates (9-8-2) is larger than the diameter of the pressing wire (14-3); the bottom of each vertical adsorption plate (9-8-2) is provided with four first adsorption grooves (9-8-3) which are sequentially arranged at equal intervals; the bottoms of the four first adsorption grooves (9-8-3) are provided with first adsorption ports;
the second welding strip feeding adsorption assembly is positioned on one side of the first welding strip feeding adsorption assembly, which is far away from the input end of the clamp conveyor; the second welding strip feeding adsorption assembly comprises a second push-down cylinder (9-9) and a horizontal adsorption plate (9-10); the horizontal adsorption plates (9-10) move up and down through the second push-down cylinders (9-9); the bottoms of the horizontal adsorption plates (9-10) are provided with four second adsorption grooves which are sequentially arranged at equal intervals; the four second adsorption grooves on the horizontal adsorption plate (9-10) are respectively aligned with the four first adsorption grooves (9-8-3) on the vertical adsorption plate (9-8-2); a plurality of second adsorption ports are formed in the second adsorption groove;
the clamp backflow device (11) comprises a second transverse moving mechanism (11-1), a second lifting mechanism and a clamp grabbing mechanism; the second transverse moving mechanism (11-1) is arranged on the light welding base; the second lifting mechanism is arranged on the second transverse moving mechanism (11-1); the clamp grabbing mechanism is arranged on the second lifting mechanism;
the final welding module (2) comprises a final welding base (5), a final welding conveyor (14), a final welding push-lift device and six pressure welding devices (15); the final welding pushing and lifting device comprises a pushing and lifting frame (16) and a pushing and lifting electric cylinder (17); the pushing and lifting frame (16) and the final welding base (5) form a sliding pair which slides along the vertical direction; the lifting frame (16) is driven by a lifting electric cylinder (17); the input end of the final welding conveyor (14) and the output end of the light welding battery conveyor (12) are arranged side by side; the six pressure welding devices (15) are all arranged on the pushing and lifting frame (16) and are sequentially arranged along the conveying direction of the final welding conveyor (14); the final welding conveyor (14) is arranged on the pushing and lifting frame (16); the final welding conveyor (14) adopts a vacuum adsorption type belt conveyor; two conveying belts are arranged in the final welding conveyor (14) in parallel at intervals;
the pressure welding device (15) comprises a pressure welding base (15-1), a pressure welding support (15-2), a pressure welding lifting mechanism, a pressure welding support plate (15-3) and a welding mechanism (15-4); the pressure welding base (15-1) is fixed on the final welding base (5); the pressure welding bracket (15-2) is arranged on the pressure welding base (15-1); the pressure welding support plate (15-3) is fixed on the pressure welding support (15-2) and is positioned between two conveying belts of the final welding conveyor (14); in the initial state, the top surface of the pressure welding support plate (15-3) is lower than the top surfaces of the two conveying belts of the final welding conveyor (14);
the welding mechanism (15-4) is arranged on the pressure welding bracket (15-2) through a pressure welding lifting mechanism; the welding mechanism (15-4) is positioned right above the pressure welding support plate (15-3) and comprises a final welding radiator (15-4-1), a diaphragm replacement assembly and four welding units; the four welding units are sequentially arranged, and the arrangement direction is vertical to the conveying direction of the final welding conveyor (14); the bottom of the welding unit is provided with a press welding head (15-4-4);
the membrane replacement assembly comprises a membrane support (15-4-10), a winding drum (15-4-11), a recovery drum (15-4-12), a coiled membrane and an unwinding driving assembly (15-4-13); the diaphragm support (15-4-10) is fixed with the pressure welding lifting sliding table (15-10); the winding discharging drum (15-4-11) and the recovery drum (15-4-12) are respectively supported at two ends of the diaphragm support (15-4-10) and are respectively positioned at two sides of the four pressure welding heads (15-4-4); two ends of the coiled membrane are respectively wound on the winding drum (15-4-11) and the recovery drum (15-4-12); the part of the coiled membrane between the coil outlet cylinder (15-4-11) and the recovery cylinder (15-4-12) bypasses the bottom of the four press welding heads (15-4-4); the recycling cylinder (15-4-12) is driven by the unreeling driving component (15-4-13).
2. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the automatic feeding device also comprises a feeding robot (6) and a feeding disc (7); the number of the optical welding modules (1) is two; the two optical welding modules (1) are arranged on the optical welding base (4) side by side; two feeding robots (6) and two feeding trays (7) are both arranged at the input end of the optical welding base (4); the two feeding robots (6) correspond to the two feeding trays (7) respectively; the feeding robot (6) adopts an industrial robot with an end effector as a pneumatic sucker.
3. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the vacuum adsorption type belt conveyor comprises a conveying frame, a transmission roller, a conveying belt, a conveying motor and a conveying adsorption plate; the two transmission rollers are respectively supported at two ends of the conveying frame; the conveying belts are wound around the two transmission rollers and tensioned by tensioning wheels; one or more conveyer belts; under the condition that a plurality of conveying belts are arranged, the conveying belts are sequentially arranged at intervals; the conveying motor is fixed on the conveying frame, and the output shaft is fixed with one of the transmission rollers; the conveying belt is provided with a plurality of waist-shaped holes which are sequentially arranged along the length direction of the conveying belt; the conveying adsorption plate is fixed on the conveying frame; the conveying adsorption plate is positioned below the conveying section of the conveying belt; the top surface of the conveying adsorption plate is provided with adsorption holes; the battery piece adsorption holes are aligned with the waist-shaped holes on the conveyer belt; the conveying adsorption plate is internally provided with a cavity.
4. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the clamp conveyor (13) is provided with two conveyer belts which are arranged side by side at intervals; second side baffles are arranged on two sides of the top of the clamp conveyor (13); the distance between the two second side baffles is equal to the length of the clamp; the output end of the clamp conveyor (13) is provided with a first limiting sensor; the first limit sensor adopts an infrared diffuse reflection sensor; the first limit sensor faces the input end of the clamp conveyor (13);
the first feeding driving assembly comprises a first feeding synchronous belt, a first feeding synchronous wheel and a first feeding driving motor (8-5); the two first feeding synchronous wheels are respectively supported at two ends of the feeding frame (8-1) and are connected through a first feeding synchronous belt; the material pulling sliding table (8-3) is fixed with the first material supply synchronous belt; the first feeding driving motor (8-5) is fixed on the feeding frame (8-1), and an output shaft is fixed with one first feeding synchronous wheel;
the second feeding driving assembly comprises a second feeding synchronous belt, a second feeding synchronous wheel and a second feeding driving motor (8-9); the two second feeding synchronous wheels are respectively supported at two ends of the feeding frame (8-1) and are connected through a second feeding synchronous belt; the clamping and cutting sliding table (8-6) is fixed with a second feeding synchronous belt; the second feeding driving motor (8-9) is fixed on the feeding frame (8-1), and an output shaft is fixed with one of the second feeding synchronizing wheels;
the first mechanical clamping jaw (8-4) comprises a first jaw frame (8-4-1), a first clamping cylinder (8-4-2), a first connecting rod (8-4-3) and a first single jaw (8-4-4); the first claw frame (8-4-1) is fixed on the material pulling sliding table (8-3); the first clamping cylinder (8-4-2) is fixed on the first claw frame (8-4-1); the inner ends of the two first connecting rods (8-4-3) are hinged with the outer end of a piston rod of the first clamping cylinder (8-4-2), and the outer ends of the two first connecting rods are hinged with the inner ends of the two first single claws (8-4-4) respectively; the middle parts of the two first single claws (8-4-4) are hinged with the first claw frame (8-4-1);
the second mechanical clamping jaw (8-8) comprises a second jaw frame (8-8-1), a second clamping cylinder (8-8-2), a fixed clamping block (8-8-3) and a movable clamping block (8-8-4); the second claw frame (8-8-1) is fixed on the clamping and cutting sliding table (8-6); the fixed clamping block (8-8-3) is fixed at the top of the second clamping frame; the middle part of the movable clamping block (8-8-4) is hinged with the fixed clamping block (8-8-3); the outer end of the movable clamping block (8-8-4) is provided with a horizontal clamping rod;
the cutting assembly (8-7) comprises a cutting frame, an upper tool rest, a lower tool rest, an upper cutting cylinder (8-7-1) and a lower cutting cylinder (8-7-2); the cutting frame is fixed on the clamping and cutting sliding table (8-6); the upper tool rest and the lower tool rest are arranged up and down and form a sliding pair sliding along the vertical direction together with the cutting frame; the upper knife rest and the lower knife rest are both fixed with cutters; the two cutters correspond to each other in position; the upper cutting cylinder (8-7-1) and the lower cutting cylinder (8-7-2) are both fixed with the cutting frame; piston rods of the upper cutting cylinder (8-7-1) and the lower cutting cylinder (8-7-2) are respectively fixed with the upper tool rest and the lower tool rest; four guide rings which are arranged in sequence are fixed on the feeding frame (8-1); the four guide rings are positioned on one side of the second mechanical clamping jaw (8-8) far away from the first mechanical clamping jaw (8-4) and are respectively aligned with the four second mechanical clamping jaws (8-8); the four solder strip unwinding mechanisms (8-10) are all arranged on the light welding base (4); the welding strips discharged by the four welding strip unwinding mechanisms (8-10) respectively pass through the corresponding guide rings, pass between the fixed clamping blocks (8-8-3) corresponding to the second mechanical clamping jaws (8-8) and the clamping rod, and pass through the space between the two cutters, and the end parts of the welding strips are clamped by the corresponding first mechanical clamping jaws (8-4).
5. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the single-side clamping jaw (9-6) comprises a first grabbing cylinder, a second connecting rod and a first hook jaw (9-6-1); the middle part of the first hook claw (9-6-1) is hinged with the first grabbing bracket (9-5) respectively; the first grabbing cylinder is fixed with a first grabbing bracket (9-5); one end of the second connecting rod is hinged with a piston rod of the first grabbing cylinder, and the other end of the second connecting rod is hinged with one end of the first hook claw (9-6-1); the single-side pushing piece (9-11) comprises a pushing cylinder and a pushing block; the pushing cylinder is fixed on the first grabbing bracket (9-5), and a piston rod is arranged downwards; a piston rod of the piston rod is fixed with a push block; the positions of the two push blocks correspond to two end fixing blocks (14-1) on a pressing and positioning clamp (14) clamped by the two unilateral clamping jaws (9-6) respectively;
the clamp grabbing mechanism comprises a second grabbing bracket (11-5), two second grabbing cylinders (11-6) and two clamping jaw assemblies; the second grabbing bracket (11-5) is fixed on the second lifting sliding table (11-4); the clamping jaw assembly comprises a turnover strip (11-8) and two second hook claws (11-7); the two second hook claws (11-7) and the turning strip (11-8) form sliding pairs and are positioned by fastening screws; the two clamping jaw assemblies are respectively arranged at two sides of the second grabbing bracket (11-5); the cylinder bodies of the two second grabbing cylinders (11-6) are hinged with the second grabbing bracket (11-5); piston rods of the two second grabbing cylinders (11-6) are respectively hinged with the two turning strips (11-8).
6. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the optical welding device (10) comprises a welding frame (10-1), an optical welding transverse adjusting assembly, a longitudinal adjusting assembly, a turnover assembly, a mounting frame (10-2), a preheating unit (10-3) and an optical welding unit (10-4); the welding frame (10-1) is fixed on the optical welding base (4); the light welding transverse adjusting assembly comprises a transverse adjusting slide rail (10-5), a transverse adjusting frame (10-6), a transverse adjusting bolt (10-7) and a locking block (10-8); the transverse adjusting slide rail (10-5) is fixed on the welding frame (10-1); the transverse adjusting frame (10-6) and the transverse adjusting slide rail (10-5) form a sliding pair; the horizontally arranged transverse adjusting bolt (10-7) and the welding frame (10-1) form a rotating pair, and the horizontally arranged transverse adjusting bolt and the transverse adjusting frame (10-6) form a screw pair; the transverse adjusting bolt (10-7) is locked by a locking block (10-8); the locking block (10-8) consists of a spanner bolt and a clamping block with a deformation joint; the wrench bolt can extrude the deformation joint by rotating, so that the locking block (10-8) clamps the transverse adjusting bolt (10-7);
the longitudinal adjusting assembly comprises a longitudinal adjusting slide rail, a longitudinal adjusting frame (10-9) and a longitudinal adjusting bolt (10-10); the vertical adjusting slide rail is fixed with the horizontal adjusting frame (10-6); the longitudinal adjusting frame (10-9) and the longitudinal adjusting slide rail form a sliding pair; the top of the longitudinal adjusting frame (10-9) is provided with an adjusting threaded hole; the longitudinal adjusting bolt (10-10) and the adjusting threaded hole on the longitudinal adjusting frame (10-9) form a screw pair and abut against the transverse adjusting frame (10-6); the overturning assembly comprises an overturning frame (10-11) and an overturning cylinder (10-12); the roll-over stand (10-11) is hinged with the longitudinal adjusting stand (10-9); the end part of the cylinder body of the overturning cylinder (10-12) is hinged with the longitudinal adjusting frame (10-9); the outer end of a piston rod of the turnover cylinder (10-12) is hinged with the turnover frame (10-11); the preheating unit (10-3) and the light welding unit (10-4) are both arranged on the roll-over stand (10-11); the preheating unit (10-3) is positioned between the light welding unit (10-4) and the synchronous grabbing mechanism of the welding strip clamp; the preheating unit (10-3) and the light welding unit (10-4) have the same structure and respectively comprise a lampshade, a heating lamp tube and a light welding radiator (10-13); the light welding radiator (10-13) is arranged on the top of the lampshade; the heating lamp tube is arranged in the lampshade.
7. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: a pressure welding transverse adjusting component is arranged between the pressure welding bracket (15-2) and the pressure welding base (15-1); the pressure welding transverse adjusting assembly comprises an adjusting seat (15-5), an adjusting screw rod (15-6) and an adjusting nut block (15-7); the bottom of the pressure welding bracket (15-2) and the top surface of the pressure welding base (15-1) form a sliding pair; two adjusting seats (15-5) are fixed on the pressure welding base (15-1); the adjusting screw (15-6) and the two adjusting seats (15-5) form a revolute pair; the adjusting nut block (15-7) is fixed at the bottom of the pressure welding bracket (15-2) and forms a screw pair with the adjusting screw rod (15-6);
the pressure welding lifting mechanism comprises a pressure welding lifting screw (15-8), a pressure welding lifting motor (15-9) and a pressure welding lifting sliding table (15-10); a pressure welding lifting screw rod (15-8) which is vertically arranged is supported on the pressure welding bracket (15-2); a pressure welding lifting motor (15-9) is fixed on the pressure welding bracket (15-2), and an output shaft is fixed with a pressure welding lifting screw rod (15-8); the pressure welding lifting sliding table (15-10) and the pressure welding bracket (15-2) form a sliding pair, and form a screw pair together with the pressure welding lifting screw (15-8);
the welding unit also comprises a single support (15-4-2), an X-axis adjusting assembly, a Y-axis adjusting assembly, a gas spring (15-4-3) and a heating rod; the X-axis adjusting assembly comprises an X-axis mounting bar (15-4-5) and an X-axis bolt (15-4-6); the two ends of the X-axis mounting bar (15-4-5) are provided with rotating short shafts; the rotating short shafts at the two ends of the X-axis mounting bar (15-4-5) and the pressure welding lifting sliding table (15-10) form a rotating pair; four X-axis bolts (15-4-6) are arranged at two ends of the rotary short shaft in a group in pairs respectively; the vertically arranged X-axis bolt (15-4-6) is in threaded connection with a threaded through hole formed in the pressure welding lifting sliding table (15-10); the bottom end of the X-axis bolt (15-4-6) props against the top surface of the X-axis mounting bar (15-4-5); two X-axis bolts (15-4-6) positioned at the same end of the X-axis mounting bar (15-4-5) are respectively positioned at two sides of the central axis of the rotating short shaft; the single bracket (15-4-2) and the X-axis mounting strip (15-4-5) form a sliding pair; the shell of the air spring (15-4-3) is fixed with the X-axis mounting strip (15-4-5), and the elastic telescopic rod is fixed with the single bracket (15-4-2); the Y-axis adjusting assembly comprises a Y-axis mounting strip (15-4-7), a deformation division strip (15-4-8) and a Y-axis bolt (15-4-9); the Y-axis mounting bar (15-4-7) is fixed at the bottom of the single bracket (15-4-2); the pressure welding head (15-4-4) is connected with the Y-axis mounting strip (15-4-7) through a bolt; the length direction of the pressure welding head (15-4-4) is parallel to the conveying direction of the final welding conveyor (14); a deformation parting strip (15-4-8) is padded between the pressure welding head (15-4-4) and the Y-axis mounting strip (15-4-7); the top and the bottom of the deformation parting strip (15-4-8) are both provided with a plurality of deformation grooves; the top of the pressure welding head (15-4-4) is provided with a plurality of deformation joints; a plurality of Y-axis bolts (15-4-9) are in threaded connection with threaded through holes formed in the Y-axis mounting bars (15-4-7), penetrate through the deformation parting strips (15-4-8) and then abut against the pressure welding heads (15-4-4); each deformation joint on the pressure welding head (15-4-4) corresponds to two Y-axis bolts (15-4-9) respectively; two Y-axis bolts (15-4-9) corresponding to the deformation joint respectively prop against two sides of the deformation joint; a heating rod is arranged in the pressure welding head (15-4-4); the final-welding radiator (15-4-1) is fixed on the top of the single bracket (15-4-2) of one welding unit.
8. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the first transverse moving mechanism (9-1) comprises a first transverse moving frame, a first transverse moving guide rail, a first transverse moving sliding table and a first transverse moving driving assembly; the first transverse moving frame is fixed on the light welding base (4); the first transverse moving guide rail is fixed on the first transverse moving frame and is arranged along the width direction of the light welding base (4); the first transverse sliding table and the first transverse guide rail form a sliding pair; the first transverse moving driving assembly comprises a first transverse moving synchronous belt, a first transverse moving synchronous wheel and a first transverse moving driving motor; the two first transverse moving synchronous wheels are respectively supported at two ends of the first transverse moving frame and are connected through a first transverse moving synchronous belt; the first transverse sliding table is fixed with the first transverse synchronous belt; the first transverse moving driving motor is fixed on the first transverse moving frame, and the output shaft is fixed with one of the first transverse moving synchronous wheels; the first lifting mechanism comprises a first lifting frame (9-2), a first lifting screw (9-3), a first lifting motor (9-4) and a first lifting sliding table; the first lifting frame (9-2) is fixed with the first transverse moving slide block; a first lifting screw rod (9-3) which is vertically arranged is supported on the first lifting frame (9-2); the first lifting motor (9-4) is fixed on the first lifting frame (9-2), and the output shaft is fixed with the first lifting screw rod (9-3); the first lifting sliding table and the first lifting frame (9-2) form a sliding pair, and the first lifting sliding table and the first lifting frame (9-3) form a screw pair;
the second transverse moving mechanism (11-1) comprises a second transverse moving frame, a second transverse moving guide rail, a second transverse moving sliding table and a second transverse moving driving assembly; the second transverse moving frame is fixed on the light welding base (4); the second transverse guide rail is fixed on the second transverse frame and arranged along the width direction of the light welding base (4); the second transverse sliding table and the second transverse guide rail form a sliding pair; the second transverse moving driving assembly comprises a second transverse moving synchronous belt, a second transverse moving synchronous wheel and a second transverse moving driving motor; the two second transverse moving synchronous wheels are respectively supported at two ends of the second transverse moving frame and are connected through a second transverse moving synchronous belt; the second transverse sliding table is fixed with a second transverse synchronous belt; the second transverse moving driving motor is fixed on the second transverse moving frame, and the output shaft is fixed with one of the second transverse moving synchronous wheels; the second lifting mechanism comprises a second lifting frame (11-2), a backflow lifting cylinder (11-3) and a second lifting sliding table (11-4); the second lifting frame (11-2) is fixed with the second transverse moving slide block; a second lifting screw rod which is vertically arranged is supported on a second lifting frame (11-2); the backflow lifting cylinder (11-3) is fixed on the second lifting frame (11-2), and the piston rod is fixed with the second lifting sliding table (11-4).
9. The two-stage soldering IBC solar cell string soldering apparatus according to claim 1, wherein: the battery string transferring module (3) comprises a third transverse moving mechanism, a third lifting mechanism and a battery string sucking assembly; the third transverse moving mechanism comprises a third transverse moving frame (18), a third transverse moving guide rail, a third transverse moving sliding table and a third transverse moving driving assembly; the third transverse moving frame (18) is fixed on the final welding base (5); the third transverse guide rail is fixed on the third transverse frame (18) and is arranged along the width direction of the light welding base (4); the third transverse sliding table and the third transverse guide rail form a sliding pair; the third transverse moving driving component comprises a third transverse moving synchronous belt, a third transverse moving synchronous wheel and a third transverse moving driving motor (19); the two third transverse moving synchronous wheels are respectively supported at two ends of a third transverse moving frame (18) and are connected through a third transverse moving synchronous belt; the third transverse sliding table is fixed with a third transverse synchronous belt; a third traverse driving motor (19) is fixed on a third traverse frame (18), and an output shaft is fixed with one third traverse synchronizing wheel;
the third lifting mechanism comprises a third lifting frame (20), a lifting electric cylinder (21) and a third lifting sliding table (22); the third lifting frame (20) is fixed with the third transverse moving slide block; a third lifting screw rod which is vertically arranged is supported on a third lifting frame (20); the lifting electric cylinder (21) is fixed on the third lifting frame (20), and the push rod is fixed with the third lifting sliding table (22); the battery string sucking component comprises a sucker mounting rod (23) and a pneumatic sucker (24); the middle part of the sucker mounting rod (23) is fixed with the third lifting sliding table (22); the length direction of the sucker mounting rod (23) is parallel to the conveying direction of the light-welded battery conveyor; a plurality of sucker mounting (23) pieces are fixed at the bottom of the sucker mounting rod (23); the length direction of the sucker mounting (23) piece is vertical to the length direction of the sucker mounting rod (23); pneumatic suction cups (24) are respectively arranged at the two ends of each suction cup installation piece (23).
10. The soldering method of the two-stage soldering type IBC solar cell string soldering apparatus according to claim 2, wherein: step one, placing a box body filled with battery pieces on two upper charging trays (7); the two feeding robots (6) respectively grab the battery pieces one by one from the corresponding feeding tray (7) and place the battery pieces on the corresponding light welding battery conveyor (12) of the light welding module (1);
step two, continuously conveying the cell pieces by using a light welding cell conveyor (12) in the light welding module (1), and stopping conveying by using the corresponding light welding cell conveyor (12) when one cell piece reaches the position below the welding strip transfer device (9); the clamp conveyor (13) conveys a pressing and positioning clamp (14) to the lower part of the welding strip transfer device (9) to be used as a working pressing and positioning clamp (14);
meanwhile, four first mechanical clamping jaws (8-4) in the welding strip feeding device (8) clamp the end parts of four welding strips respectively; the material pulling sliding table (8-3) and the clamping and cutting sliding table (8-6) reversely slide, so that the length of a welding strip between the first mechanical clamping jaw (8-4) and a cutter in the cutting assembly (8-7) reaches a preset value; the four second mechanical clamping jaws (8-8) respectively clamp the corresponding welding strips; the cutting assembly (8-7) cuts off the four welding strips; the ends of the four welding strips, which are far away from the first mechanical clamping jaw (8-4), are positioned right below the working pressing positioning clamp (14);
step three, moving a welding strip clamp synchronous grabbing mechanism in the welding strip transfer device (9) to be right above the four welding strips; two unilateral clamping jaws (9-6) respectively hook two ends of the working pressing positioning clamp (14); then, the two single-side pushing pieces (9-11) are pushed out, so that the connecting frame (14-2) in the working pressing positioning clamp (14) is lifted upwards;
pushing out by a first downward pushing cylinder (9-7) and a second downward pushing cylinder (9-9); after each vertical adsorption plate (9-8-2) on the interpenetration adsorption block (9-8) passes through the gap between each pressing wire (14-3) on the working pressing positioning fixture (14), each first adsorption groove (9-8-3) at the bottom of the vertical adsorption plate (9-8-2) is respectively contacted with the corresponding welding strip; each second adsorption groove at the bottom of the horizontal adsorption plate (9-10) is respectively contacted with the corresponding welding strip;
fifthly, inserting the adsorption blocks (9-8) and the horizontal adsorption plates (9-10) to adsorb the four welding strips; the four first mechanical clamping jaws (8-4) are loosened;
conveying the working pressing positioning fixture (14) and the four welding strips to the position right above the battery piece of the optical welding battery conveyor by the welding strip transfer device (9), and placing the welding strips and the working pressing positioning fixture (14) on the battery piece; the working pressing positioning clamp (14) is positioned above one battery piece, and the welding strip covers the two battery pieces; the two single-side pushing pieces (9-11) retract, so that the connecting frame (14-2) in the working pressing positioning clamp (14) moves downwards; a pressing wire (14-3) on the working pressing positioning clamp (14) presses one end of each of the four welding strips;
the part of the welding strip which is not pressed by the working pressing and positioning clamp (14) is pressed in the carrying process of the next welding strip and the pressing and positioning clamp (14); carrying processes of two adjacent welding strips and a pressing positioning clamp (14); the positions of the four welding strips in the previous conveying are staggered with those of the four welding strips in the next conveying; one battery string comprises twelve battery pieces; the battery piece at the head end and the battery piece at the tail end are respectively provided with four welding strips which only cover one battery piece; the eight welding strips only covering one battery piece are also conveyed by the welding strip transfer device (9); when four short welding strips with short lengths positioned at the head end of the electric battery piece are conveyed, the welding strip transfer device (9) does not convey the pressing positioning clamp (14) at the same time;
seventhly, the battery pieces with the welding strips placed pass through the position right below the light welding device (10) under the conveying of the light welding battery conveyor; the optical welding device (10) heats the battery plate and the welding strip, so that the welding strip and the battery plate are preliminarily welded together;
step eight, when the pressing and positioning clamp (14) on the optical welding battery conveyor (12) reaches the position below the clamp backflow device (11), a clamp grabbing mechanism in the clamp backflow device (11) conveys the pressing and positioning clamp (14) pressed on the battery piece to the input end of the clamp conveyor (13);
step nine, when the preliminarily welded battery string arrives below the battery string transfer module (3), if the final welding module (2) is not welded, the battery string suction assembly in the battery string transfer module (3) sucks the battery string and conveys the battery string to a final welding conveyor (14) of the final welding module (2);
step ten, conveying the battery strings to six pressure welding devices (15) by a final welding conveyor (14), wherein each battery string contains twelve battery pieces; every two of the twelve battery pieces are in a group, and the six groups of battery pieces are respectively positioned right below the welding mechanism (15-4) in the six pressure welding devices (15); the electric lifting cylinder (17) drives the lifting frame (16) to slide downwards, so that the final welding conveyor (14) moves downwards and is separated from each battery piece; each battery piece is supported by each pressure welding support plate (15-3);
eleven, heating the pressure welding heads (15-4-4) in the six welding mechanisms (15-4); and the six welding mechanisms (15-4) move downwards, so that the welding strips on each battery string are pressed by the pressing welding heads (15-4-4), and the welding strips and the battery plates are further welded together.
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