Equipment Overview
The stack welding machine is mainly used for the overlapping welding of monocrystalline and polycrystalline cells in fully automatic crystalline silicon solar cell modules, and is suitable for series welding of small-sized crystalline silicon solar cells.
Overlapping welding production line, mainly divided into:
1. Laser cutting
2. ECA coating
3. Lamination
4. Typesetting
Among them, nesting includes lead welding, busbar welding and nesting, bypass welding strip and parallel welding strip.
According to the whole line process, it is mainly divided into the following equipment:
1. Laser dicing machine (cutting)
2. Silk screen printing machine (gluing)
3. Lamination welding machine (welding)
4. End lead welding machine (lead)
5. Battery string blanking machine (blanking)
Process Introduction
Splinter part: It is composed of feeding conveying, rotary handling, and splinter platform
Sharding part: It is composed of handling robot, feeding conveying, A-side conveying, B-side conveying, intermediate conveying, tail conveying, A-side slicing servo, B-side slicing servo, spacing cylinder, leveling cylinder, turning cylinder, etc
Lamination part: 3 robots, A-side lamination conveyor, B-side lamination conveyor, lampshade part
Finished product part: It is composed of the X-axis of blanking, the Z-axis of blanking, the conveying of finished products on the A side, and the conveying of finished products on the B side
problem
At present, the "fixed method" commonly used to superimpose small solar cells in turn is easily affected by the total number of cells, the qualification rate of a single cell, and the accuracy of transportation and positioning, resulting in a decrease in the qualification rate of cells!
solution
1. Sharding control
(1) Cobra450 cooperates with the vision system to grab and transport 5 small cells on the splinter platform to the infeed conveyor belt.
(2) The chamfer and the right-angle piece are separated by the material distribution servo, and the right-angle piece enters the A-side conveyor belt and the intermediate conveyor belt, and the chamfer enters the B-side conveyor belt.
(3) The chamfer is rotated so that the direction of the chamfer is consistent.
(4) The A-side, B-side, middle, and tail conveyor belts are visually installed for material position detection and OK/NG detection.
2. Tail piece control
Due to the different specifications of A and B surfaces, the three robots need to take different specifications for the tail piece, and the tail piece should be increased when the number of tail pieces is insufficient.
Quickly handle the arrangement of tail pieces by using arrays. It includes unique program modules such as array generation, A-plane type search, B-plane type search, and tail number search.
3. Lead control
The first and last pieces of the battery string need to increase the leads, and the X and Y lead mechanisms need to be added to cooperate with the lead servo to convey the lead to a fixed length and weld it through the lampshade.
The position array mode is used for data recording, and when the first piece or the last piece is laminated, the current position P1 of the conveyor belt is recorded to form a position array. According to the set of sheet width, overlap amount, number of laminations, space distance and other parameters, the position of the conveyor belt welded by the lower lead and lampshade is judged in real time, and the position of the lead X-axis and the lampshade X-axis can be moved by 6 pieces, and the lower lead and welding action can be carried out after being in place.
4. Lamination control
Visually collects the position data, and then obtains the position of the robot's air gripper stacking through the lamination algorithm. The EIP communication of the robot is in Byte format, and the conversion program module is used to quickly communicate with the robot, and finally the robot performs the lamination action.
System configuration
The ultra-high-speed vision system FH series collects the position data, and then obtains the position of the robot's air gripper stacking through the NX1 series mechanical automation controller and the built-in lamination algorithm. The robots are all composed of Omron SCARA with high load and long arm span, and the servo drives are all Omron 1S series, which can realize precise control of the action curve.
Deliver value
Domestic cutting-edge lamination technology
As a new process in the solar cell industry, the stack welding machine greatly improves the power conversion efficiency compared with the pull welding machine process. After adopting the lamination algorithm, the pass rate of the stacking welding machine is increased by 10%, and the accuracy of the lamination is as high as ±0.05mm in combination with visual positioning.
FROM
Speed: 6000 pieces/hour
Accuracy: ±0.2mm
Pass rate: 88%
TO
Speed: 10000 pieces/hour
Accuracy: ±0.05mm
Pass rate: 98%
【Management】
Provide domestic cutting-edge battery lamination technology, greatly improve the speed and pass rate, and the industry's top competitiveness!
【Management】
Through visual positioning and robot deviation correction, high-precision lamination is realized, and the quality is improved.
Precise timing control of multiple axes and mechanisms realizes the high-speed motion beat of the whole machine.
【Engineer Layer】
The whole system is provided with technical support by Omron, and the later maintenance is guaranteed.
Reduce development time with a single software for integrated control of all devices.
Omron has always been committed to solving problems that arise in production and promoting production innovation. In particular, the "Integrated" concept of Omron's intelligent manufacturing concept i-Automation! aims to provide core technologies for manufacturing innovation, create simpler and more flexible manufacturing sites for customers, realize high-speed and high-precision production, and make production more intelligent.
Article source: Omron Industrial Automation Information Account
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