Photovoltaic cell processing process?

I. Preparation

1. Work must wear work clothes, work shoes, wear a work hat, wear adiabatic gloves;

2. Do a good job of process hygiene (including laminating machine and high temperature cloth cleaning);

3. Confirm that the emergency button is in a normal state;

4. Check the water level of circulating water.

Two, the required materials, tools and equipment

1, stacked components 2, laminating machine 3, insulating gloves 4, PTFE cloth (high temperature cloth) 5, art knife 6, 1cm stationery tape 7, sweat gloves 8, scalpel

Three, the operating procedures

1. Check the position of the travel switch;

2. Turn on the laminating machine and set the corresponding process parameters according to the process requirements. Set the corresponding process parameters in accordance with the process requirements, warm up to the set temperature;

3. Go for an empty cycle, the whole process of monitoring the vacuum parameter changes are normal, to confirm that the laminator vacuum up to the specified requirements;

4. Test pressure, lay a layer of fiber cloth, pay attention to the front and back and the upper and lower fabrics, lift a piece of laminating components to be laminated;

5. Take off the flow sheet, check the value of the current and voltage, and then check the current and voltage of the module. Observe whether there is obvious displacement of cells and converging strips in the components, whether there is foreign matter, broken pieces and other bad phenomena, if any, then return to the previous process;

6. Wear gloves to carry the components from the storage place where the laminating is completed and the inspection is qualified, and the hand shall not squeeze the cells (to prevent the broken pieces) during the process of carrying and shall be kept smooth (to prevent the displacement of cells in the components);

7. Glass side down, lead line to the left, smooth into the middle of the laminator, and then cover a layer of fiber cloth (pay attention to make the front of the fiber cloth toward the components), lamination operation;

8. Observe the lamination of the relevant parameters of the work (temperature, vacuum, and the state of the upper and lower chambers), especially pay attention to whether the vacuum is normal, and will be recorded in the flow of relevant parameters in the single

9. To be completed lamination operation After the lamination operation is completed, the upper cover of the laminating machine will be opened automatically, and the components will be taken out (or output automatically);

10. Uncover the fiber cloth after cooling, and clean the fiber cloth;

11. Check that the components comply with the process quality requirements and cool down to a certain extent, then trim the edges; (the glass side is downward, and the cutter is inclined at about 45 °, and note that it should keep the cutter sharp, to prevent the backboard from straining the edges);

12. After passing the inspection to the designated location, if not qualified, isolate and wait for rework.

Check before lamination

1. Whether the serial number of the component is the same as the serial number of the flow sheet;

2. Whether the current and voltage values on the flow sheet are not filled in or not measured, there is a mistake, etc.;

3. Positive and negative poles of the component lead-outs (generally left positive and right negative);

4. The length of lead-outs should not be too short (to prevent the installation of the junction box), and should not be bent;

5. Folding;

5. Whether the TPT has scratches, scuffs, folds, pits, whether it is safe to cover the glass, whether the front and back are correct;

6. The front and back of the EVA, the size, the presence of cracks, dirt, etc.

7. The front and back of the glass, air bubbles, scratches, etc.

8. Slag, soldering, broken pieces, missing corners, hairs, black dots within the component, fibers, interconnecting strips or residues of sinking strips, etc.

9. Whether the isolation TPT is in place, whether the sinking strips and interconnecting strips are clipped or not clipped;

10. Pitch (cell-to-cell, cell-to-glass edge, string-to-string, cell-to-sinking strips, sinking strips-to-sinking strips, sinking strips-to-glass edge, etc.)

Observations in the laminator

Open the top cover of the laminator. 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, confirm the temperature and parameters

Conform to the process requirements and then feed; the components are completely inside the laminator and click to drop; the vacuum gauge of the upper and lower chambers should reach -0.1MPa (evacuation) (If abnormalities are found, press "emergency stop", then manually push the components into the laminator). (If you find any abnormality, press "emergency stop", take out the component manually, and try to press a component again after troubleshooting.) Wait for the set time to finish, then the upper chamber will be inflated (the vacuum gauge of the upper chamber will show) 0.00MPa, and the vacuum gauge of the lower chamber will still be kept at -0.1MPa, and the lamination will be started. After the lamination time is finished, the lower chamber is deflated (the vacuum gauge of the lower chamber is changed

to 0.00MPa, and the vacuum gauge of the upper chamber is still 0.00MPa). After the deflation time is finished, the cover is opened (the vacuum gauge of the upper chamber is changed to

-0.1MPa, and the vacuum gauge of the lower chamber is unchanged), and the material is discharged; and then the tetrafluoro cloth is automatically returned to the original point.

After lamination, check again

1. Whether TPT has scratches, scratches, whether it is safe to cover the glass, whether the front and back sides are correct, whether it is flat, whether there is no fold, whether there is no bump phenomenon;

2. Slag, soldering, broken pieces, missing corners, hair, fibers and so on in the component;

3. Whether the isolation of the TPT is in place, the converging strip and interconnecting strips Whether the isolation TPT is in place, the converging strip and interconnecting strip are cut flush;

4. Spacing (cell to cell, cell to glass edge, string to string, cell to converging strip, converging strip to converging strip, converging strip to glass edge, etc.);

5. Whether the color difference and negative electrode soldering are serious;

6. Whether the interconnecting strip is yellowed, and whether the converging strip is shifted;

7. Whether air bubbles or vacuum bubbles appear in the assembly;

8. Whether the interconnecting strips are in the same place, and whether there are any defects in the interconnecting strips. Whether there is bubble or vacuum bubble phenomenon in the component;

8. Whether there is conductor foreign body lap between the two strings of cells to cause short-circuit;

Fourth, the quality requirements

1. TPT is no scratches, scratches, front and back should be correct;

2. No hair, fibers, and other foreign objects in the component, no bubbles, debris;

3. No obvious displacement of the cell inside the component, gap uniformity, the minimum Displacement of the module internal cell, gap uniformity, the minimum spacing shall not be less than 1mm;

4. The back of the module is not obvious bump or depression;

5. The spacing between the module converging bars shall not be less than 2mm;

6. The gel rate of the EVA shall not be less than 75%, and each batch of EVA shall be measured for the second time.

V. Precautions

1. laminating machine operated by a person, other personnel are not allowed to enter the red;

2. trimming the edge of the attention to safety;

3. fiberglass cloth with no residual EVA, impurities, etc.;

4. toughened glass corners are fragile, lifting and placing the protection must be careful;

5. placing the components should be flat to hold flat, fingers should not press the cell;

5. The fingers should not press the battery cells;

6. After putting in the components, quickly laminate them 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 the screen state and the control state, to prevent misuse;

9. Press the "emergency stop" after the emergence of abnormal situation and exit after eliminating the problem. After the abnormal situation, press "emergency stop" to exit, after troubleshooting, the first to restore the lower chamber vacuum;

10. The lower chamber deflation speed is set, can not be arbitrarily changed, agreed by the director of the equipment can be changed only after the corresponding adjustment of the lower chamber deflation time, the laminar pressure parameters by the technology does not come to determine the arbitrary changes are not permitted;

11. The upper chamber of the rubber skin is a valuable consumables, the feed should be carefully checked before feeding Careful inspection, to avoid sharps, iron and other things mixed in, scratching the rubber skin;

12. Before opening the lid must check whether the lower box inflatable completed, otherwise not allowed to open the lid, so as not to damage the equipment;

13. Replacement of the parameters must be taken after the empty cycle, test pressure of a component.

Component framing

I. Preparation

1. When working, you must wear work clothes, shoes, work cap.

2. Do a good job of process hygiene, cleaning and organizing the table, to create a clean and orderly framing environment.

Second, the required materials, tools and equipment

1, laminated battery components 2, aluminum frame 3, silicone 4, alcohol 6, rubbing paper 7, junction box 8, pneumatic glue gun 9, rubber mallet 10, framing machine 11, scissors 12, tweezers 13, rags 14, a small one word up 15, tape measure 16, ruler 17, tool table 18, pre-assembled table

Third, Operation Procedures

1. According to the drawings to select the corresponding materials, aluminum profiles, and their inspection, screening out the aluminum profiles do not meet the requirements, will be placed in a designated location;

2. The lamination is completed on the surface of the battery components for cleaning, and at the same time on the previous process to check, unqualified return to the previous process rework;

3. Screws (material) and short profiles for right-angle connections and short profiles at right angles to each other, with the splices less than 0.5mm) to connect the side profiles and E profiles at right angles to each other, and ensure that the joints are smooth;

4. Inject the appropriate amount of silica gel uniformly into the grooves of the aluminum alloy frame;

5. Embed the components into the aluminum frame that has been injected with silica gel, and compact them;

6. Move the components to the framing machine (close the pneumatic valve to fix it on one side). Close the pneumatic valve and fix it)

7. Fix the remaining two corners of the aluminum frame with screws (material) and adjust the distance between the glass and the frame as well as the length of the diagonal of the frame;

8. Evenly make up the glue at the seams on the front side with the glue gun;

9. Remove the overflow of silicone on the surface of the component and clean it;

10. Open the pneumatic valve, turn over and then fix the component;

11. Open the pneumatic valve, flip the component, and then fix the component;

11. Press the four corners of TPT with appropriate force, so that the glass surface is close to the inner wall of the aluminum alloy frame, and pay attention to the surface of TPT in the process of pressing;

12. Use the mending gun to mend glue on the back of the component at the gaps (all around);

13. Fix the junction box with silicone on the back of the component as required by the drawing and check whether the diode is connected in reverse;

14. Whether to connect the reverse;

14. The framed components for self-check (there is no leakage, bubbles or gaps);

15. Meet the requirements of the "process flow sheet" on the record, the components will be placed in the designated area, flow into the next process.

Fourth, the quality requirements

1. Aluminum alloy frame two diagonal less than 1m error is required to be less than 2mm, greater than or equal to the 1m error is less than 3mm;

2. Frame installation is smooth, straight, no scratches;

3. Components within the cell and the frame spacing;

4. Aluminum frame and silicone combined with the visible seam;

4.

5. Leads in the junction box must be sealed with silicone at the root, no rupture of the junction box, hidden cracks, complete fittings, the thickness of silicone at the bottom of the box is 1~2mm, and the position of the junction box is accurate and parallel to the four sides;

6. Height of the back of the aluminum frame of the component at the seams is less than 0.5mm;

7. Gap at the back of the aluminum frame of the module at the seams is less than 1mm.

8. Aluminum alloy frame four mounting holes hole spacing of the size of the allowable deviation ± 0.5mm.

V. Note

1. Lightly carry and put up the unframed components are careful not to touch the corners of the components.

2 Note that the hands should be kept clean

3. Aluminum frames have been loaded into the components from the turnover table to the framing machine should be lifted to hold the corners, to prevent the components from slipping out of the frame.