Mbb Full Automatic Solar Cell Tabber Stringer

• Customization: Available
• After-sales Service: on Line Support
• Warranty: One Year Warranty
• Model NO.: MS40K
• Cell Thickness: 170um to 200um
• Number of Cell Busbar: 3bb-12bb
• Transport Package: Sea Transportation
• Specification: MS40K
• Trademark: OOITECH
• Origin: China
• HS Code: 8486
• Production Capacity: 100set/Year

Product Description

   Function
1   Cell feeding
Each set of cell cassette loading unit consists of two parallel conveyors, which are mainly responsible for conveying full cell cassette to cell pickup position and discharging the empty cell cassette.
After the cell cassette reaches the cell pickup position, the rotary cell feed device will pick cells up one by one and load onto conveyor.
Each set of cell pickup assembly consists of a cell raise electric cylinder and a rotary cell feed mechniasm (with sunction cups), as well as air knife to ensure that only one cell is picked up from cell cassette each time.
If there is no cassette on the conveyor, the machine will automatically stop and raise alarm.
2   Cell feeding conveyor
Cell feed unit consists of two conveyors. There are holes on the conveyor and vacuum can hold cells firmly during transfer process to prevent cell sliding. The conveyor is driven by servo motor, which can send cells to CCD work station accurately.
3  Laser cutter and dust collector (optional)
The laser cutter adopts imported laser and focus laser beam on cell back. Cells are picked up from cell cassette and transferred forward via steel belt. After completing cell alignment during transfer process, cells would be sent to cell cutting station and perform multi cutting by galvo scanning system in static state, then cells would be split into two pieces by cell split device. The laser cutter is equipped with a dust collector, which can remove the dust caused by cell laser cutting process. The dust removal efficiency can reach to 99.8%.
4  Flux system
There is a set of flux soaking tray on A/B line of the machine. Ribbon goes through the flux soaking tray and its surface will be coated with flux.
The flux in the soaking tray is refilled by the flux tank in cabinet and level meter is installed in the flux tank, so that it will alarm and remind to add flux if the level is below the lower limit. The capacity of flux tank is 8L.
The flux tank, pipe and nozzle are all made with anti-corrosive materials.
5    Image processor inspection
Advanced industrial camera is used to do inspection and to check the following defects:
5.1    Full cell inspection:
Defect inspection: chipped corner, chipped edge, crack, screen offset, 90°/180° screen rotation and other defects. Defect level (such as crack depth) can be defined on HMI.
a)    Positioning: position the cell center point via busbar and cell top/bottom edge. After the coordinate data is converted, laser cutter will adjust the cutting position via galvo scanning system and perform cell cutting.
5.2    Inspection after cell cutting:
a)    Defect inspection: chipped corner, chipped edge, crack, screen offset, 90°/180° screen rotation, surface foreign matter (optional) and other defects. Defect level (such as crack depth) can be defined on HMI.
b)     Busbar positioning: inspect the position of cell center and bus bar, so as to make busbar
match with the ribbon.
CCD will report the inspection result to the robot so that the robot can precisely position the cell.
Multiple programs can be stored in the CCD controller to meet the inspect requirements
of cells with different specifications.
c)    Cell cutting inspection: inspect the cutting length and depth, the inspect accuracy is 0.5mm.
6    SCARA robot
High-accuracy four-axis robot is used to reach the following results:
a)    Pickup NG cells and place into the NG cell box.
b)    Pickup OK cells and place onto the conveyor. During this process, fine adjustment will be performed based on the CCD detect result, which can make the busbar align with ribbon.
Using robot to traverse cells enjoys the following advantages:
1)    Precise positioning: positioning precision is up to 0.01mm, which can effectively reduce soldering offset, and ensure the accuracy of the cell spacing and string straightness.
2)    High efficiency: fast movement contributes to high efficiency.
3)    Intelligent positioning: suitable for different types of cells.
4)    Stable, reliable and repeatable quality: little maintenance is required.
7    Ribbon feed
Ribbon feed assembly consists of 12 sets of ribbon supply motor and ribbon guide wheel set. Each ribbon supply unit can be enabled and disabled via HMI operation to fit the soldering of 3BB to 12BB cells.
The ribbon spool is directly placed on the motor drive shaft to ensure no vibrating and distortion during production process. The tension wheel of guide wheel set can make the ribbon supply more stable.
The maximum weight of ribbon spool that driven by ribbon supply motor is 12 kg. It is compatible with the ribbon spools of different supplier.
When the ribbon spool is empty, the sensor outputs a signal, and the machine will raise alarm and then stop, prompting to replace ribbon spool. The auxiliary fixture of ribbon supply unit can help the operator change the ribbon spool quickly, within 5 minutes.
8    Ribbon stretching, bending and cutting
Ribbon processing system can be used to stretch, bend, cut and transfer ribbon. The stretching value can be set in HMI, and the bending depth and position is easily adjusted by operator.
Precision-machined guide posts ensure that each ribbon is parallel and the spacing gap is correct.
If switch to 3BB-12BB cells, it needs to replace the related guide tooling for ribbon stretch, bending and cutting device.
9    Ribbon Traction
The ribbon traction mechanism consists of two traction arms (inner and outer), which can work alternately to draw ribbons out and place them directly on the busbar of cell.
The servo motor and linear module used for traction arms can offer positioning accuracy of 0.01mm.
10    Assembly Conveyor in Soldering Area
Made of Teflon, the assembly conveyor belt can resist high temperature and prevent tin adhesion.
In order to reduce stress inside cells caused by temperature change, there are several heating plates under the conveyor, which are used to preheat cells before soldering (4 plates) and cool down cells after soldering (4 plates). The temperature of these plates can be set on HMI.
Driven by a servo motor, this conveyor can achieve positioning accuracy of 0.1mm.
By using an exhaust fan to create negative pressure, the holes on the conveyor belt and heating plates can hold the cells firmly in place, preventing cell or ribbon offset.
The conveyor is one-side supported, easy for maintenance and replacement of belt.
11    Soldering
Infrared soldering is used to heat both sides of cells at the same time and solder cells and ribbons together.
The IR soldering station is controlled by a high-speed soldering controller. The soldering temperature is detected by an imported high temperature sensor. The soldering parameter can be set on HMI.
The soldering station is driven by a servo motor plus a linear module to move up and down. The adjustable soldering height and accurate positioning work together to ensure high quality of soldering.
The service life of infrared lamp is about 3000 hours. In normal use, it can work for about 4-6 months.
The temperature of heating plate under the conveyor in soldering position can be adjusted to fit the soldering process for different types of cells, ensuring soldering quality.
12    Outlet
The outlet area is composed of 2 conveyor belts, 2 lower string pick up arms, 1 upper string pick up arm, 1 string traverse arm, 2 OK string trays support frame and 1 NG string tray support frame.
After the string is forwarded to the outlet area, the string pickup arms and string traverse arm
will function to put strings into the OK string tray or the NG string tray.
The outlet area can be set to manual or automatic inspection mode. Under the manual mode, the string will rotate automatically for easy manual inspection.
There are two options to select: removal of string tray from outlet area for offline operations or integration of string layup machine which allows direct conveyance of string to layup machine.
13    Inline String Inspection (Optional)
This module is optional. Please refer to Appendix 3.
14    Inline EL Inspection (Optional)
This module is optional. 
Main parts and components are listed as follows:
 

Name	Brand
PLC	KEYENCE
Servo	YASKAWA
Robot	EPSON
CCD	DALSA
Sensor	OMRON, PANASONIC
Touch screen	ADVANTECH
Terminals	WAGO, DEGSON
Cable carrier	IGUS, MISUMI
Bearing	NSK
Linear screw module	THK, HIWIN, TBI, etc.
Pneumatic parts	SMC, AirTAC
Mechanical parts	MISUMI, YIHEDA, etc.
Motor	JSCC, Leadshine

 


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