CN101110458A - Ultrasonic soldering equipment for solar cell electrode - Google Patents
Ultrasonic soldering equipment for solar cell electrode Download PDFInfo
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- CN101110458A CN101110458A CNA2007100758809A CN200710075880A CN101110458A CN 101110458 A CN101110458 A CN 101110458A CN A2007100758809 A CNA2007100758809 A CN A2007100758809A CN 200710075880 A CN200710075880 A CN 200710075880A CN 101110458 A CN101110458 A CN 101110458A
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Abstract
The present invention discloses an automatic ultrasonic wave welding equipment for welding amorphous silicon solar cell electrode, which aims to improve current ultrasonic wave metal spot welding machine and add a mechanical wire pressing and take-up device and method to replace manual wire pressing and laying and is technically characterized in that a working table is composed of a feeding zone, a welding zone and a discharging zone. An electrode wire 10-2 is coiled on an uncoiling wheel 10-1 of the electrode wire pressing device 10. A guide wheel 10-3 and an extension-resistant tightening pulley 10-4 are arranged on a front slab bracket 108 below the uncoiling wheel 10-1. A corresponding ultrasonic wave welding head 10-7 is mounted between a coiling wheel 10-5 and a flattening wheel 10-8. The present invention is suitable for automatic welding of thin film solar cell electrode with glass or flexible material as substrate, thus ensuring high precision, nice appearance and equal distance between welding spots, improving welding efficiency and eliminating rosin joint.
Description
Technical field
The invention discloses a kind of welding equipment that is used for thin-film solar cells, definite a kind of auto-ultrasonic welding equipment that is used for the welding of non-crystal silicon solar cell electrode of saying so.
Background technology
At present, existing ultrasonic wave metal bonding machine has adopted ultrasonic bonding head and hold down gag welded pipe plate-type solar thermal collector as China Patent No. ZL02271879.6; Chinese patent ZL99235388.2 discloses the rolling ultrasonic bonding; Chinese patent 98106400.0 open ultrasonic wave copper platinum welding, more than three patents substantially all focus on and solve a kind of certain products welding, welding as the mechanical property preferred metal, therefore ultrasonic wave rolls to weld and all be added with bigger pressure on plumb joint, apply the bigger ultrasonic bonding of frequency simultaneously, to be adapted to the welding of the bigger metal of thickness.And in non-crystal silicon solar cell electrode welding procedure, can not directly use welding of ultrasonic wave copper platinum and ultrasonic wave metal rolling continuous welding mode.Because of the electrode metal coating of non-crystal silicon solar cell is thinner, generally adopt metallic aluminium to be coated with tin with the electrode wires of ultrasonic bonding, be called for short being coated with the tin band, tape thickness is the 2-3 millimeter, width is 0.3 millimeter.Therefore, need special welding pressure and ultrasonic frequency during the welding of non-crystal silicon solar cell electrode, otherwise can damage solar cell, influence battery outward appearance and electrical property.At present, the single-point ultrasonic bonding is generally adopted in the welding of the utmost point of non-crystal silicon solar cell, and shortcoming is that welding efficiency is lower.Especially adopt manual mode feeding workpiece, welding quality can not guarantee, can't realize in enormous quantities, requirement of massive production.
Summary of the invention
Technical problem to be solved by this invention is to change existing non-crystal silicon solar cell single-point supersonic welding connection technology, and with manual or semi-automatic feeding workpiece, welding efficiency is low, the problem of poor welding quality.
The present invention aims to provide a kind of plant equipment that can weld the non-crystal silicon solar cell electrode continuously automatically.Purpose is the welding equipment that existing ultrasonic wave metal point welding machine, workbench and PLC controller are controlled is improved, and increases mechanical action line ball and tensioning apparatus, replaces manual line ball and wiring.
Another object of the present invention provides a kind of utilization mechanical type conveying workbench, the automatic transport solar cell, and the feed accuracy height, the contact conductor welding is smooth, a kind of implementation method.
For realizing the technical solution of task of the present invention, be that prior art is comprised that ultrasonic wave metal point welding machine, workbench and PLC digital control system further improve, the technical characterictic workbench is divided into feeding, welding, three service areas of discharging, ultrasonic wave metal point welding machine is installed in zone line, and the conveyer of solar cell and electrode wires unwrapping wire hold down gag and automatic tangent apparatus are installed in respectively in the zone of ultrasonic wave metal point welding machine both sides.Electrode wires unwrapping wire hold down gag, by PLC digital control system control ultrasonic wave metal point welding machine, by electrode wires (or claiming to be coated with the tin band) unwrapping wire hold down gag, positioning roller device, and automatic width adjusting apparatus, electrode wires is welded on the electrode of corresponding solar cell.
The plumb joint of ultrasonic wave metal point welding machine is between smooth wheel of fabric wheel and automatic width adjusting apparatus.The respective side of the positioning roller on the solar cell of feed zone and the positioning roller device is tangent.The cross section, edge of positioning roller is " U " type groove structure on the roller devices.The electrode wires hold down gag welds electrode wires tensioning compress on the electrode surface of solar cell.Three districts at workbench all are equipped with the Working rack that can align.Working rack transmits support in feeding district and discharge zone support, and positioning roller is installed on the symmetrical transmission support.
Solar cell is a non-crystal silicon solar cell, and the electrode weldering pressure of welding non-crystal silicon solar cell is 2～3MPa; Spot welding power is 110～330W.Electrode wires unwrapping wire hold down gag comprises that also smooth a wheel with elastomer is connected.Ultrasonic electrode welding method, workbench are divided into charging, welding, three service areas of discharging, and its welding step is as follows:
A, regulate the Working rack in feeding district, make left and right symmetrically be arranged in shortest spacing between the positioning roller on the transmission bracket and the width of non-crystal silicon solar cell is complementary;
The conveyer of b, solar cell is sent non-crystal silicon solar cell into welding region;
C, in the weld zone, the unwrapping wire cord grip with the electrode wires compress to the non-crystal silicon solar cell battery electrode;
D, PLC control, fixed point welding non-crystal silicon solar cell electrode;
E, be welded with the non-crystal silicon solar cell of electrode wires, under PLC control, withdraw from welding region;
F, under PLC control, enter discharge zone, thread cutter is started working, and cuts off electrode wires;
G, until the electrode welding of finishing a cell panel, discharging.
Be to drive screw mandrel under the PLC control, advance the amorphous silicon sun that is fixed on the positioning fixture to enter welding region with feed speed by stepping motor.
PLC controls into machine operation, drives screw mandrel promotion platform, and until finishing required the counting of weldering, welding is finished, and after the welding cycle, the workbench return enters welding next time standby condition.
The first step of welding, under PLC control, ultrasonic vibration stops, and welding head is depressed into electrode wires on the electrode of solar battery, and spot welding pressure is 2～3MPa; Metal on electrode wires and the non-crystal silicon solar cell is rubbed, both are welded together by metal mutually, finish pinpoint welding procedure, wherein, the best duration of the little vibration of high frequency is 0.14～0.16 second; The spot welding frequency is 20～40Hz; Spot welding power is 110～330W.
The present invention's contribution is existing ultrasonic wave metal point welding machine is improved its part-structure, increases mechanical action line ball and tensioning apparatus, to improve welding efficiency, replaces manual line ball and wiring, makes the contact conductor welding smooth.In addition, can also adjust automatic worktable and PLC controller digital-control system.
The PLC controller can be assigned stepping motor is rotated the order that stops according to program; Drive side direction transmission locating wheel and rotate, the rotation by the symmetrical side direction transmission locating wheel in both sides can drive the solar cell along continuous straight runs and do rectilinear motion, but drag the weight of rolling the support non-crystal silicon solar cell, makes the solar battery pas horizontal motion.Solar cell is transported to electrode wires unwrapping wire hold down gag, can be automatically with the contact conductor of required welding, compress and with the electrode wires rear end tensioning that goes between, satisfies the line ball requirement of ultrasonic bonding on solar cell electrode surface to be welded.
The good effect that the present invention produced is remarkable, show as and be: can weld automatically continuously, and the welding direction control precision is higher, is fit to the welding solar cell, is the welding of the thin film solar cell electrode of substrate with glass or flexible material especially, make the contact conductor welding smooth, outward appearance is good, and the efficient height can be handling strong, guarantee pad spacing unanimity, eliminated rosin joint.
Automatic width adjusting apparatus of the present invention can adopt slide rail transmission or screw mandrel transmission to adjust spacing between the positioning roller.
Special-purpose electrode wires unwrapping wire hold down gag, at ultrasonic wave metal means of spot welds mode, automatic unwrapping wire line ball, when tensioning apparatus had overcome the ultrasonic wave metal welding in welding process simultaneously, sealing wire was because the weld defect that cold draw produces.When having improved ultrasonic bonding in enormous quantities simultaneously, the unfavorable factor that labor intensity of operating staff is big.After having welded a solar cell, PLC gives signal instruction of automatic tangent apparatus, and automatic tangent apparatus can cut off electrode wires automatically.
Electrode wires unwrapping wire hold down gag of the present invention comprises electrode wires actinobacillus device and electrode wires hold down gag, and the electrode wires actinobacillus device comprises actinobacillus wheel, directive wheel, anti-extension regulating wheel; The electrode wires hold down gag comprises fabric wheel, retractor device and smooth the wheel, is connected with electrode wires between electrode wires actinobacillus device and electrode wires hold down gag, and the anti-extension regulating wheel of described electrode wires and electrode wires actinobacillus device is tangent; The fabric wheel of described electrode wires and electrode wires hold down gag is tangent.
The solar cell conveyer comprises controllable motor, positioning roller, idler pulley, transmission bracket, solar cell is positioned on the idler pulley, positioning roller connects with controllable motor, the respective side of positioning roller and solar cell is tangent, positioning roller is arranged on the transmission bracket successively symmetrically, and positioning roller and idler pulley all can be along axial rotation separately.
Thread cutter comprises soft substrate, cutter and retractor device, and cutter connects with retractor device, and cutter moves with the retractor device in the vertical direction, and electrode wires is between soft substrate and cutter.Be wound with electrode wires on actinobacillus wheel, be connected with electrode wires between actinobacillus wheel and the directive wheel, electrode wires is tangent with actinobacillus wheel, directive wheel respectively, is connected with electrode wires between directive wheel and anti-extension regulating wheel, and electrode wires and directive wheel are tangent; Electrode wires and anti-extension regulating wheel are tangent, are connected with electrode wires between anti-extension regulating wheel and fabric wheel, and be tangent with anti-extension regulating wheel; Electrode wires and fabric wheel are tangent, retractor device comprises slide bar and chute, the slide bar part is positioned at chute, fabric wheel connects with the slide bar of retractor device, plumb joint is between fabric wheel and smooth the wheel, and described actinobacillus wheel, electrode wires, directive wheel, anti-extension regulating wheel, fabric wheel, retractor device, plumb joint and smooth the wheel are positioned at same plane.
The cross section, edge of positioning roller is " U " type groove structure, and the electrode of solar battery at described solar cell two ends is positioned at corresponding " U " type groove just.
Motor is servomotor or stepping motor.The welding direction of ultrasonic bonding head is for pumping, and the direction of motion of electrode of solar battery on workbench is the batch (-type) rectilinear motion.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structure enlarged diagram in the dotted line F among Fig. 1.
Fig. 3 is an electrode wires unwrapping wire hold down gag schematic diagram among Fig. 1.
Fig. 4 is 13 a schematic diagram among Fig. 1.
Fig. 5 is the end view of conveying workbench 1 of the present invention.
Fig. 6 is the fiting relation figure of positioning roller of the present invention and battery electrode 10-9 and electrode wires 10-2.
Fig. 7 is 11 a pad position schematic diagram among Fig. 1.
Fig. 8 is a stretching structure schematic diagram in the width adjusting apparatus of the present invention.
Fig. 9 is the overall structure front view of lead screw transmission of the present invention.
Figure 10 is the view of Fig. 9 of the present invention.
Figure 11 is the right view of Fig. 9 of the present invention.
Figure 12 is with the schematic diagram of the elastomeric smooth 10-8 of wheel among Fig. 2.
See 1 workbench 1 among the figure, stepping motor 2, positioning roller 3, idler pulley 4, transmission bracket 5, solar cell 6, guide rail slide block 7, guide rail 8, support 9, electrode wires unwrapping wire hold down gag 10, actinobacillus wheel 10-1, electrode wires 10-2, directive wheel 10-3, anti-extension regulating wheel 10-4, fabric wheel 10-5, cylinder 10-6, expansion link 10-6-1, cavity 10-6-2, plumb joint 10-7, the smooth 10-8 that takes turns, compression spring 10-8-1, electrode of solar battery 10-9, ultrasonic wave metal point welding machine 11, PLC digital control system 12, thread cutter 13, soft substrate 101, cutter 102, cylinder 103, leading screw 104, stepping motor 105, positioning fixture 106, connecting rod 107, preceding flat bracket 108, rear plate support 109.
Content of the present invention according to the accompanying drawing detailed description.
Electrode wires generally adopts metallic aluminium to be coated with the tin band, and tape thickness is the 2-3 millimeter, and width is 0.3 millimeter.
Such as Fig. 1, PLC digital control system 12 is positioned at the right-hand member of workbench 1. Guide rail 8 is arranged, guide rail on the workbench Slide block 7 forms the slide rail transmission with guide rail 8, and transmission bracket 5 is positioned on the support 9, and support 9 is sliding with guide rail Piece 7 connects. Moving guide rail slide block 7 can drive support 9, will be positioned at the side direction transmission positioning roller on the support 3 spacing. PLC digital control system 12 control step motors 2 are because stepper motor 2 and positioning roller 3 Be tight joint, so positioning roller 3 rotates synchronously with stepper motor 2. Along the location that bilateral symmetry is arranged Roller 3 rotates simultaneously, and the non-crystal silicon solar cell 6 tangent with the respective side edge of positioning roller 3 is subjected to this The effect of tangential force and feeding, what the guide rail slide block 7 of guide rail 8 interior work formed is the slide rail transmission mechanism, also Can adopt lead-screw drive mechanism to adjust spacing.
Among Fig. 2, between unwrapping wire hold down gag 10 and thread cutter 3, ultrasonic welding machine 11 is arranged. Unwrapping wire is pressed Be wound with electrode wires 10-2 on the actinobacillus wheel 10-1 in the tight device 10. Actinobacillus wheel 10-1 axle passes connecting rod 107 Corresponding fraising on the front flat bracket 108 below the actinobacillus wheel 10-1, is also adopted the hinging supporting shaft connecting mode Directive wheel 10-3 and anti-extension regulating wheel 10-4 are installed. The expansion link 10-6-1 of fabric wheel 10-5 and cylinder 10-6 Connect. Fabric wheel 10-5 and smooth the wheel between the 10-8, corresponding ultrasonic bonding head 10-7 is installed. Cut Line apparatus 13 is installed on the rear plate support 109. Thread cutter 13 comprises soft substrate 101, cutter 102 And cylinder 103, cutter 102 connects with the expansion link of cylinder 103. Electrode wires 10-2 is positioned at soft substrate 101 And between the cutter 102. Cylinder 103 and soft substrate 101 are installed on the rear plate support 109.
Fig. 3 is wound with electrode wires 10-2 on the actinobacillus wheel 10-1. Be positioned at the guiding that is equipped with of actinobacillus wheel 10-1 below Wheel 10-3. Be directed to smooth behind the electrode wires 10-2 process directive wheel 10-3. Directive wheel 10-3 below is equipped with Anti-extension regulating wheel 10-4, electrode wires 10-2 are passed to and are positioned at tensioning after anti-extension regulating wheel 10-4 tensioning The fabric wheel 10-5 of wheel 10-4 below. At this moment, electrode wires 10-2 is positioned at solar cell 6 and fabric wheel 10-5 Between. Fabric wheel 10-5 connects with the expansion link 10-6-1 of cylinder 10-6. Fabric wheel 10-5 and smooth the wheel Between the 10-8, corresponding ultrasonic bonding head 10-7 is installed. Controlled by PLC, plumb joint 10-7 is with ultrasonic Pick 11 retractor devices interlock of wave soldering compresses the electrode wires on the solar cell, carries out then ultrasonic bonding, For non-crystal silicon solar cell, its welding parameter is as follows: welding pressure: 2.3 MPa; Bonding power: 110～330W. Smooth 10-8 and solar cell 6 surfaces of taking turns are tangent, are positioned at solar energy after welding job is finished Electrode wires on the battery electrode is welded smooth by the smooth 10-8 of wheel, produce remaining answering to eliminate welding Power. Actinobacillus wheel 10-1, the electrode wires 10-2 of the above, directive wheel 10-3, anti-extension regulating wheel 10-4, Fabric wheel 10-5, retractor device 10-6, plumb joint 10-7 and the smooth 10-8 of wheel are positioned at same perpendicular.
Fig. 4, the electrode wires unwrapping wire is the tangent line operation after compressing. Thread cutter 13 comprise soft substrate 101, Cutter 102 and cylinder 103, cutter 102 connects with the expansion link of cylinder 103. The move of cylinder 103 Sent by PLC, cutter 102 moves with the expansion link in the vertical direction of cylinder 103. Electrode wires 10-2 position Between soft substrate 101 and cutter 102, cutter 102 moves down up to contacting electricity with soft substrate 101 Polar curve is cut off. Soft substrate 101 can adopt the nonrigid material making such as rubber.
As shown in Figure 5, non-crystal silicon solar cell electrode 10-9 is positioned on the idler pulley 4. The side direction at two ends passes Moving process is as follows: the positioning roller 3 of arranging along bilateral symmetry rotates simultaneously, with the respective side of positioning roller 3 The tangent drive non-crystal silicon solar cell electrode 10-9 in limit is subjected to the effect of this tangential force and feeding enters pressure Plumb joint 10-7 carries out electrode wires 10-2 and non-crystal silicon solar cell electrode 10-9 behind line and the welding region Welding.
As shown in Figure 6, the cross section, edge of positioning roller 3 is " U " type groove structure, non-crystal silicon solar cell 6 non-crystal silicon solar cell electrode 10-9 is positioned at corresponding " U " type groove just, and non-crystal silicon solar energy The respective cross-section of battery electrode 10-9 and positioning roller 3 is tangent.
Fig. 7, ultrasonic bonding head 10-7, in carrying out welding process, the A direction is the ultrasonic bonding frequency The vibrations direction moves back and forth about namely, also is to produce the main direction that welding is extended; B is ultrasonic bonding head The welding direction of 10-7 pumps, and collocation non-crystal silicon solar cell electrode 10-9 is at workbench On the batch (-type) rectilinear motion of direction of motion C, realize welding job of the present invention.
Fig. 8, cylinder 10-6 or cylinder 103 comprise expansion link 10-6-1 and the chamber that can hold expansion link 10-6-1 Body 10-6-2 is fixed with cutter 102 or fabric wheel 10-5 at the end of expansion link 10-6-1. Fabric wheel 10-5 10-6-1 connects with expansion link, and fabric wheel 10-5 moves up and down with expansion link 10-6-1. Cylinder 10-6,103 All can adopt the controlled cylinder of SMC company, controlled cylinder adopts programme-control, its control telescopic feed amount Precision is higher.
See Fig. 9, Figure 10 and shown in Figure 11, its leading screw 104 connects solar cell with stepper motor 105 Plate is fastened on the anchor clamps 107, and anchor clamps 107 connect with leading screw, this conveyer employing lead screw transmission Mode, the rotation that can accurately stepper motor 105 be passed to leading screw 104 is converted to the straight line of anchor clamps 106 The amount of feeding, thus the non-crystal silicon solar cell 6 that is fixed on the anchor clamps 107 is carried out accurate feeding control. Because adopt lead screw transmission, positioning roller 3 and serial stepper motor are all cancelled, in other words, in the present invention Conveyer in, in other device situations of not doing to change, replaced the roller transmission with lead screw transmission, The solar cell feeding is directly controlled by lead screw transmission. In addition, non-crystal silicon solar cell 6, corresponding anchor clamps 107, leading screw 104 and stepper motor 105 are installed on the workbench 109. Ultrasonic welding machine 11 symmetries Be installed in workbench 109 both sides.
As shown in figure 12, it has concluded general structure of the present invention and process diagram. For adopting the slide rail transmission The auto-ultrasonic mash welder,
Embodiment
Example 1, see embodiment 1 of the present utility model as shown in Figure 1, electrode wires adopts metallic aluminium to be coated with the tin band, and tape thickness is 2 millimeters, and width is 0.3 millimeter.Solar cell 6 is that non-crystal silicon solar cell is substrate with glass, the control of PLC system down, the feeding district delivers to the ultrasonic bonding district by conveyer with non-crystal silicon solar cell, electrode wires unwrapping wire hold down gag is 2 millimeters with thickness automatically, width be 0.3 millimeter be coated with that the tin band stretches, compresses, the smooth tin band that is coated with, metal electric welding machine soldering tip, welding pressure 2MPa, bonding power 110W.Electrode welding is finished the conveyer battery and is sent into automatic tangent apparatus 13 and cut off and be coated with tin band, back discharging.The welding efficiency height, the solder joint smooth appearance is good, cooperates with automatic assembly line, can continuous feed, welding, discharging.
The guide rail slide block 7 and the adjustable supports 9 of work in the guide rail 8 on the workbench 1 will be positioned on the support 9 side direction transmission positioning roller 3 and idler pulley 4, and the spacing of 3 of side direction transmission positioning rollers transfers, and will be whole to the width that is fit to processing.With non-crystal silicon solar cell to be processed 6, be positioned between workbench left end support, rotate by PLC controller 12 control step motors 2, can drive side direction transmission positioning roller 3 rotates, two relative side direction transmission positioning rollers 3 are done opposite rotation, give solar cell 6 with reaction force, battery 6 moves horizontally from left to right, brings battery 6 into line ball and welding region.Adjust the spacing of 3 of the relative side direction transmission positioning rollers of two positions, slide rail transmission mechanism that this guide rail 8 and guide rail slide block 7 formed also can adopt lead screw transmission mechanism to adjust spacing.
Example 2, present embodiment overall structure are seen Fig. 1～Fig. 8 with example 1, on workbench 1, solar cell conveyer, electrode wires unwrapping wire hold down gag 10, ultrasonic wave metal point welding machine 11, thread cutter 13 and PLC digital control system 12 are installed successively from left to right.Its main technique step is as follows: the first step is arranged in solar cell on the workbench 1; In second step, conveyer drives solar cell, realizes straight-line feed; In the 3rd step, electrode wires unwrapping wire hold down gag 10 is emitted electrode wires; Compress and be welded on the solar cell; In the 4th step, thread cutter 13 cuts off electrode wires.
In conveyer, with the installation method of symmetric arrangement, the centre bore of positioning roller 3 is passed in the rotating shaft of stepping motor 2, connects with interference fit between the axle of the two and the hole; Stepping motor 2 is installed in side under the transmission bracket 5, adopts thread connection between the two.Positioning roller 3 is positioned on the transmission bracket 5, symmetric arrays.The side is equipped with row's roller bearing within the transmission bracket 5, and described roller bearing passes the centre bore of idler pulley 4, and described roller bearing is installed two rolling bearings in the mode of interference fit, and two rolling bearings are embedded in the centre bore of idler pulley 4 in the mode of interference fits just.
Conveyer is a segmented, and the centre bore of positioning roller 3 is passed in the rotating shaft of stepping motor 2, connects with interference fit between the axle of the two and the hole; Stepping motor 2 is installed in side under the transmission bracket 5, adopts thread connection between the two.Positioning roller 3 is positioned on the transmission bracket 5, symmetric arrays.The side is equipped with row's roller bearing within the transmission bracket 5.
In unwrapping wire hold down gag 10, be wound with electrode wires 10-2 on the actinobacillus wheel 10-1.The heart has one to pass among the actinobacillus wheel 10-1, passes the corresponding fraising of connecting rod 107, and this is that hinging supporting shaft commonly used in the prior art connects mounting means.On the preceding flat bracket 108 below the actinobacillus wheel 10-1, also adopt described hinging supporting shaft connecting mode that directive wheel 10-3 and anti-extension regulating wheel 10-4 are installed.Fabric wheel 10-5 connects with the expansion link 10-6-1 of cylinder 10-6.Fabric wheel 10-5 and smooth the wheel between the 10-8, corresponding ultrasonic bonding head 10-7 is installed.Processing step is as follows: the first step is arranged in solar cell on the workbench 1; In second step, conveyer drives solar cell, realizes straight-line feed; In the 3rd step, electrode wires unwrapping wire hold down gag 10 is emitted electrode wires; Compress and be welded on the solar cell; In the 4th step, thread cutter 13 cuts off electrode wires.
In the installation region of unwrapping wire hold down gag 10, corresponding transmission bracket 5 disconnects in described zone.In other words, the structure of conveyer is a segmented, and unwrapping wire hold down gag 10, ultrasonic wave metal point welding machine 11 and thread cutter 13 be installed between the adjacent conveyer successively.In unwrapping wire hold down gag 10, be wound with electrode wires 10-2 on the actinobacillus wheel 10-1.The heart has one to pass among the described actinobacillus wheel 10-1, is the relation of interference fit between described axle and the actinobacillus wheel 10-1, and the other end of described axle passes the corresponding fraising of connecting rod 107 just, and this is that hinging supporting shaft commonly used in the prior art connects mounting means.On the preceding flat bracket 108 below the actinobacillus wheel 10-1, also adopt described hinging supporting shaft connecting mode that directive wheel 10-3 and anti-extension regulating wheel 10-4 are installed.Fabric wheel 10-5 connects with the expansion link 10-6-1 of cylinder 10-6.Fabric wheel 10-5 and smooth the wheel between the 10-8, corresponding ultrasonic bonding head 10-7 is installed.Along the direction of feed of solar cell, be followed successively by thread cutter 13, conveyer after the unwrapping wire hold down gag 10 and be arranged in workbench 1 both sides symmetrically.
Example 3, technological process of the present invention are as follows:
1) regulates support 9, make along the spacing between the positioning roller 3 on both sides symmetric arrays successively and the width of non-crystal silicon solar cell to be complementary;
2), PLC control step motor 2 work, drive positioning roller 3 and rotate, drive non-crystal silicon solar cell 6 and enter the weld zone;
3), the unwrapping wire cord grip with the electrode wires compress on non-crystal silicon solar cell: step 1, stepping
5), PLC control step motor 2 stops operating, and after non-crystal silicon solar cell 6 is static, carries out ultrasonic spot welding and connects, comprising:
The first step is depressed plumb joint 10-7 under PLC control, near sun energy battery electrode, carry out ultrasonic bonding, in about 0～1 second time period, does not produce ultrasonic vibration;
In second step, ultrasonic spot welder plumb joint 10-7 is depressed into electrode wires 10-2 on the non-crystal silicon solar cell electrode, welding pressure 2.3MPa; Plumb joint 10-7 rubs the metal on electrode wires and the non-crystal silicon solar cell, and both are welded together by metal mutually, and bonding power is 220W.
6), welding PLC control step motor 2 work that finishes, drive positioning roller 3 and rotate, the non-crystal silicon solar cell that is welded with electrode wires withdraws from welding region;
7), under PLC control, send instruction to cylinder 103, cutter 102 cuts off electrode wires;
8), after last block of non-crystal silicon solar cell plate welds, the welding job of a cell panel subsequently begins, after it enters welding region, the beginning repeating step 4, finish until a welding cycle.
Example 4, employing lead screw transmission, technological process of the present invention is as follows:
1, adjusts positioning fixture 107, non-crystal silicon solar cell 6 is positioned;
2, PLC control step motor 105 work drive leading screw 104 and advance the non-crystal silicon solar cell 6 that has been fixed on the positioning fixture 107 to enter welding region, and non-crystal silicon solar cell 6 feed speeds are;
3), enter welding region after, the unwrapping wire cord grip with the electrode wires compress to non-crystal silicon solar cell;
Processing step:
The first step, stepping motor 105 slows down, and non-crystal silicon solar cell 6 continues feeding;
In second step, cylinder stretches out expansion link 10-6-1 under PLC control, the fabric wheel 10-5 that connects with expansion link 10-6-1 with electrode wires 10-2 compress to non-crystal silicon solar cell 6;
In the 3rd step, electrode wires 10-2 is subjected to the effect of fabric wheel 10-5 frictional force, and electrode actinobacillus wheel 10-1 rotates under electrode wires 10-2 tension, and 10-2 emits with electrode wires;
In the 4th step, guide roller will be emitted electrode wires and be guided to correct welding position;
In the 5th step, regulating wheel is used to overcome the welding that produces because of welding and extends;
The 6th the step, the welding finish after, smooth take turns the welding electrode line smooth.The smooth 10-8 of wheel is soft roller, can adopt elasticity rubber making preferably, with protection non-crystal silicon solar cell 6.
5, PLC control step motor 105 stops operating, and after non-crystal silicon solar cell 6 is static, carries out ultrasonic spot welding and connects, and comprising:
The first step, ultrasonic spot welder is depressed plumb joint 10-7 under PLC control, PLC control plumb joint 10-7 is near sun energy battery electrode, the plumb joint traveling time is controlled to be 0～1 second, ultrasonic bonding is carried out in preparation, in 0～1 second time period, does not produce ultrasonic vibration, for the amorphous silicon non-crystal silicon solar cell, the best duration of this section time-delay is 0.1 second;
In second step, ultrasonic spot welder plumb joint 10-7 is depressed into electrode wires 10-2 on the non-crystal silicon solar cell electrode, and welding pressure is 2.3 MPa; 0.4 second the little vibration metal of high frequency of plumb joint 10-7 work is welded together mutually, finishes welding process.6, weld the PLC control step machine operation that finishes, drive leading screw promotion platform and enter next welding region, carry out next means of spot welds; Repeat this process,, finish welding job until finishing required the counting of welding;
7, withdraw from welding region, under PLC control, the distance that working table movement is certain, when staying the welding electrode Len req, PLC sends instruction to cylinder 103, and thread cutter 13 is started working, and cutting is cut off electrode wires with cutter 102, finishes welding job.
8, finish a welding cycle after, the workbench return enters next time welding standby condition.Example 5, as shown in figure 11 is the protection non-crystal silicon solar cell, and the smooth 10-8 that takes turns compresses spring 10-8-1 with one, and downward elastic force is to guarantee the Elastic Contact of smooth 10-8 of wheel and non-crystal silicon solar cell.The smooth 10-8 of wheel is surrounded by nonrigid material manufacturings such as annulate lamella 10-8-polytetrafluoroethylene or rubber outward.
Claims (15)
1. the device for ultrasonic welding of an electrode of solar battery, comprise ultrasonic wave metal point welding machine, workbench and PLC digital control system, it is characterized in that this workbench is divided into feeding, welding, three service areas of discharging, ultrasonic wave metal point welding machine is installed in zone line, and the conveyer of solar cell and electrode wires unwrapping wire hold down gag and automatic tangent apparatus are installed in respectively in the zone of ultrasonic wave metal point welding machine both sides.
2. the device for ultrasonic welding of a kind of electrode of solar battery as claimed in claim 1, it is characterized in that said electrode wires unwrapping wire hold down gag, by PLC digital control system control ultrasonic wave metal point welding machine, by electrode wires unwrapping wire hold down gag, the positioning roller device, and automatic width adjusting apparatus, electrode wires is welded on the electrode of corresponding solar cell.
3. the device for ultrasonic welding of a kind of electrode of solar battery as claimed in claim 1 or 2, it is characterized in that: the plumb joint of ultrasonic wave metal point welding machine is between smooth wheel of fabric wheel and automatic width adjusting apparatus.
4. the device for ultrasonic welding of a kind of electrode of solar battery as claimed in claim 1 is characterized in that the respective side of the solar cell of said feed zone and the positioning roller on the positioning roller device is tangent.
5. the device for ultrasonic welding of a kind of electrode of solar battery as claimed in claim 4, it is characterized in that on the described roller devices cross section, edge of positioning roller be " U " type groove structure.
6. the device for ultrasonic welding of a kind of electrode of solar battery as claimed in claim 1, the device for ultrasonic welding that it is characterized in that a kind of electrode of solar battery, said electrode wires unwrapping wire hold down gag welds electrode wires tensioning compress on the electrode surface of solar cell.
7. the device for ultrasonic welding of an electrode of solar battery as claimed in claim 1 is characterized in that the conveyer of described solar cell in three districts of workbench the Working rack that can align being installed all.
8. the device for ultrasonic welding of an electrode of solar battery as claimed in claim 1 is characterized in that described Working rack transmits support in feeding district and discharge zone support, and positioning roller is installed on the symmetrical transmission support.
9. the device for ultrasonic welding of electrode of solar battery as claimed in claim 1 is characterized in that described device for ultrasonic welding, and the electrode weldering pressure of non-crystal silicon solar cell is 2～3MPa; The best duration of the little vibration of high frequency is 0.14～0.16 second; The spot welding frequency is 20～40Hz; Spot welding power is 110～330W.
10. the device for ultrasonic welding electrode wires unwrapping wire hold down gag of electrode of solar battery as claimed in claim 1 is characterized in that describedly it is characterized in that described electrode wires unwrapping wire hold down gag comprises that also smooth a wheel with elastomer is connected; The described smooth outer annulate lamella that is surrounded by of taking turns.
11. the electrode welding method of the device for ultrasonic welding of electrode of solar battery as claimed in claim 1, it is characterized in that described ultrasonic wave metal point welding machine, workbench and the PLC digital control system of comprising, it is characterized in that this workbench is divided into charging, welding, three service areas of discharging, its welding step is as follows:
A, regulate the Working rack in feeding district, make left and right symmetrically be arranged in shortest spacing between the positioning roller (3) on the transmission bracket and the width of non-crystal silicon solar cell is complementary;
The conveyer of b, solar cell is sent non-crystal silicon solar cell into welding region;
C, in the weld zone, the unwrapping wire cord grip with the electrode wires compress to the non-crystal silicon solar cell battery electrode;
D, PLC control, fixed point welding non-crystal silicon solar cell electrode;
E, be welded with the non-crystal silicon solar cell of electrode wires, under PLC control, withdraw from welding region;
F, under PLC control, enter discharge zone, thread cutter is started working, and cuts off electrode wires;
G, until the electrode welding of finishing a cell panel, discharging.
12. the electrode welding method of the device for ultrasonic welding of electrode of solar battery as claimed in claim 11, the Working rack that it is characterized in that described feeding district are to adjust positioning fixture, and non-crystal silicon solar cell is positioned.
13. the electrode welding method of the device for ultrasonic welding of electrode of solar battery as claimed in claim 11, it is characterized in that described PLC control is to drive screw mandrel by stepping motor, advance the amorphous silicon sun that is fixed on the positioning fixture to enter welding region with feed speed.
14. the electrode welding method of the device for ultrasonic welding of electrode of solar battery as claimed in claim 11, it is characterized in that described PLC controls into machine operation, drive screw mandrel promotion platform, until finishing required the counting of weldering, welding is finished, after the welding cycle, the workbench return enters welding next time standby condition.
15. the electrode welding method of the device for ultrasonic welding of electrode of solar battery as claimed in claim 10, the first step that it is characterized in that described welding, under PLC control, ultrasonic vibration stops, welding head is depressed into electrode wires (10-2) on the electrode of solar battery, and spot welding pressure is 2～3MPa; Afterwards, some soldering tip (10-7) is done 0.1～0.4 second the little vibration of high frequency, and the metal on electrode wires and the non-crystal silicon solar cell is rubbed, both are welded together by metal mutually, finish pinpoint welding procedure, wherein, the best duration of the little vibration of high frequency is 0.14～0.16 second; The spot welding frequency is 20～40Hz; Spot welding power is 110～330W.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100758809A CN100448035C (en) | 2007-07-12 | 2007-07-12 | Ultrasonic soldering equipment for solar cell electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100758809A CN100448035C (en) | 2007-07-12 | 2007-07-12 | Ultrasonic soldering equipment for solar cell electrode |
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| CN101110458A true CN101110458A (en) | 2008-01-23 |
| CN100448035C CN100448035C (en) | 2008-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100758809A Expired - Fee Related CN100448035C (en) | 2007-07-12 | 2007-07-12 | Ultrasonic soldering equipment for solar cell electrode |
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| CN (1) | CN100448035C (en) |
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Assignee: Chuangyi Science and Technology Development Co., Ltd., Shenzhen City Assignor: Li Yi Contract fulfillment period: 2008.10.4 to 2009.10.4 Contract record no.: 2008440000460 Denomination of invention: Ultrasonic soldering equipment for solar cell electrode Granted publication date: 20081231 License type: exclusive license Record date: 20081208 |
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