Pv Cell Processing Flow

[Trezza Lucilla]

lamination

I. preparation

1 Wear work clothes, work shoes, work hats and insulating gloves when working

2. Do a good job in process hygiene (including cleaning the inside of the laminator and high-temperature cloth)
3. Confirm that the emergency button is in normal state
4. Check the circulating water level

II. Required materials, tools and equipment

1. Laminated components 2. Laminator 3. Thermal insulation gloves 4. Tetrafluoro cloth (high temperature cloth) 5. Art knife 6. 1cm stationery tape 7. Sweat cloth gloves 8. Scalpel

III. operating procedures

1. Check the position of travel switch
2. Start the laminator, set the corresponding process parameters according to the process requirements, and raise the temperature to the set temperature
3. Take an air cycle, monitor whether the vacuum parameter changes normally in the whole process, and confirm that the vacuum degree of the laminator meets the specified requirements
4. For pressure test, lay a layer of fiber cloth, pay attention to the front and back, upper and lower cloth, and lift a component to be laminated
5. Take down the flow transfer sheet, check the current and voltage value, and check whether there is obvious displacement of battery sheet and bus bar in the module, and whether there are foreign matters, fragments and other adverse phenomena. If so, return to the previous process
6. Wear gloves to carry the stacked and qualified components from the storage place. During the handling process, do not squeeze the battery pieces with your hands (to prevent fragments), but keep them stable (to prevent the displacement of the battery pieces in the components) 8. Observe the relevant parameters (temperature, vacuum degree and upper and lower chamber States) during lamination, especially pay attention to whether the vacuum degree is normal, and record the relevant parameters in the flow sheet

9. After the lamination operation is completed, the upper cover of the laminator will open automatically and take out the components (or output automatically)
10. Remove the fiber cloth after cooling and clean the fiber cloth
11. Check that the components meet the process quality requirements and trim after cooling to a certain extent; (the glass is facing down and the cutter is inclined about 45 °, pay attention to keep the cutter sharp to prevent pulling the edge of the back plate)
12. After passing the inspection, place it in the designated position. If it is unqualified, isolate it and wait for rework
check before lamination

1. Whether the serial number in the component is consistent with the serial number of the flow sheet
2. Whether the current and voltage values on the flow sheet are not filled in or measured, with errors, etc
3. The positive and negative poles led out by the component (generally left positive and right negative)
4. The length of the outgoing line shall not be too short (to prevent it from being installed into the junction box) and shall not be discounted
5. Whether the TPT has scratches, scratches, folds, pits, whether the glass is covered safely, and whether the front and back sides are correct
6. Front and back sides, size, crack and dirt of EVA
7. Front and back sides of glass, bubbles, scratches, etc
8. Tin slag, solder knuckles, fragments, missing corners, hair, black spots, fibers, residues of interconnection bars or bus bars in the components
9. Whether the isolation TPT is in place and whether the bus bar and interconnection bar are cut flush or not
10. Spacing (cell and cell, cell and glass edge, string and string, cell and bus bar, bus bar and bus bar, bus bar to glass edge, etc.)

during lamination, observe

open the upper cover of the laminator, the vacuum gauge of the upper chamber is -0.1mpa and the vacuum gauge of the lower chamber is 0.00mpa, and feed after confirming that the temperature and parameters

meet the process requirements; Click to descend after the component completely enters the inside of the laminator; Both the upper and lower chamber vacuum gauges should

reach -0.1mpa (vacuumizing) (press "emergency stop" in case of abnormality, take out the component manually, and press another component after troubleshooting). Wait until the set time is over, the upper chamber is inflated (displayed by the upper chamber vacuum gauge) 0.00mpa,

the lower chamber vacuum gauge still remains -0.1mpa and starts lamination. After the lamination time is completed, the lower chamber is deflated (the lower chamber vacuum gauge changes to

0.00mpa, and the upper chamber vacuum gauge is still 0.00mpa). After the deflating time is completed, the cover is opened (the upper chamber vacuum gauge changes to

- 0.1MPa, and the lower chamber vacuum gauge remains unchanged) for discharging; Then the Teflon cloth automatically returns to the origin
check again after lamination

1. Whether the TPT has scratches and scratches, whether it covers the glass safely, whether the front and back sides are correct, whether they are flat, whether there are folds and whether there are concave convex phenomena
2. Tin slag, welding flowers, fragments, missing corners, hair, fibers, etc. in the components
3. Whether the isolation TPT is in place and whether the bus bar and interconnection bar are cut flush
4. spacing (cell to cell, cell to glass edge, string to string, cell to bus bar, bus bar to bus bar, bus bar to glass edge, etc.)
5. Whether the color difference and negative electrode welding are serious
6. Whether the interconnection bar turns yellow and whether the bus bar shifts
7. Whether there are bubbles or vacuum bubbles in the component
8. Whether there is any conductor foreign matter overlapping between the two strings of battery cells, resulting in a short circuit
IV. quality requirements

1. TPT shall be free of scratches and scratches, and the front and back sides shall be correct
2. There is no hair, fiber and other foreign matters, bubbles and fragments in the component
3. There is no obvious displacement of the battery in the module, the gap is uniform, and the minimum spacing shall not be less than 1mm
4. There is no obvious bulge or depression on the back of the component
5. The spacing between component bus bars shall not be less than 2mm6.EVA can not be less than 75%, and the EVA of each batch is two times. Br> v. precautions

1. The laminator is operated by a specially assigned person, and other personnel are not allowed to enter the red
2. Pay attention to safety when trimming
3. There is no residual EVA and impurities on the glass fiber cloth
4. The four corners of tempered glass are fragile and must be carefully protected when lifting and placing
5. The components should be placed flat, and the fingers should not press the battery
6. After putting in the components, laminate them quickly and take them out quickly after opening the cover
7. Check whether the cooling water level, travel switch and vacuum pump are normal
8. Distinguish between screen state and control state to prevent misoperation
9. Press "emergency stop" to exit in case of abnormal conditions. After troubleshooting, first restore the lower chamber vacuum
10. After setting the lower chamber venting speed, it cannot be changed at will. It can only be changed with the consent of the equipment supervisor, and the lower chamber venting time can be adjusted accordingly. The lamination parameters are determined by technology and cannot be changed at will
11. The rubber skin in the upper room is a valuable and consumable product. It should be carefully checked before feeding to avoid mixing sharp tools, iron tools and other things and scratching the rubber
12. Before opening the cover, check whether the lower box is inflated, otherwise it is not allowed to open the cover to avoid damaging the equipment
13. After changing parameters, empty cycle must be carried out to test the pressure of a component
component framing

I. preparatory work

1. You must wear work clothes, shoes and work hat when working
2. Do a good job in process hygiene, clean and tidy the table, and create Hop over to this website a clean and orderly framing environment
II. Required materials, tools and equipment

1. Laminated battery module 2. Aluminum frame 3. Silica gel 4. Alcohol 6. Adhesive tape 7. Junction box 8. Pneumatic glue gun 9. Rubber hammer 10. Framing machine 11. Scissors 12. Tweezers 13. Rag 14. Small square 15. Tape 16. Angle ruler 17. Tool table 18. Pre assembly table

III. operating procedures

1. Select the corresponding materials and aluminum profiles according to the drawings and inspect them, Screen out the aluminum profiles that do not meet the requirements and place them in the designated position
2. Clean the surface of the laminated battery module, and check the previous process at the same time. If it is unqualified, return to the previous process for rework
3. Connect the side profile and e profile at right angles with screws (the material connects the long profile and short profile at right angles, and the butt joint is less than 0.5mm), and ensure that the joint is flat
4. Evenly inject an appropriate amount of silica gel into the groove of the aluminum alloy outer frame
5. Insert the component into the aluminum frame injected with silica gel and compact it
6. Move the components to the framing machine (close to one side, close the pneumatic valve and fix it)
7. Fix