Introduction to Photovoltaic Modules and 21 Common Quality Issues -4

　　Reasons for virtual soldering of leads

　　1. Improper or careless operation methods by personnel result in solder leakage;

　　2. The soldering iron temperature is too low, too high, or the soldering time is too short, causing virtual soldering.

　　Component impact:

　　1. Component power is too low;

　　2. Poor connection leads to increased resistance and ignition, resulting in component burnout.

　　Preventive measures:

　　1. Strictly require operators to perform SOP operations and standardize the methods of operation;

　　2. Check the temperature of the soldering iron on time and standardize the welding time.

　　Reason for non curing silicone junction box

　　1. The silicone ratio does not meet the process requirements, resulting in the silicone not curing;

　　2. If the adhesive hole A or B is blocked, it will not solidify.

　　Component impact:

　　1. Silicone non curing adhesive will flow out from the edge of the gap in the wire box, and the leads inside the box will be exposed to the air. When exposed to rainwater or moisture, it can cause electrical connection and cause the components to catch fire.

　　Preventive measures:

　　1. Strictly follow the regulations to confirm the drying action of the silicone gauge every hour;

　　2. Regularly confirm whether the silicone ratio meets the process requirements;

　　3. The cleaning process should be strictly controlled to ensure that the silicone gel is 100% cured properly.

　　Reason for EVA strip turning yellow

　　1. EVA strips are exposed to air for a long time, causing mutations;

　　2. EVA is affected by contamination from soldering flux, alcohol, and other substances, leading to mutations;

　　3. Chemical reactions occur when used in combination with EVA from different manufacturers.

　　Component impact:

　　1. Customers do not accept poor appearance;

　　2. It may cause delamination phenomenon.

　　Preventive measures:

　　1. After opening EVA, strictly follow the process requirements and use it up within 12 hours to avoid prolonged exposure to air;

　　2. Pay attention to the cleaning of the material placement area within 5 seconds to avoid contamination during the processing;

　　3. Avoid using EVA with non same factory households.

　　Reasons for foreign objects and red pen marks on glass surfaces

　　1. Failure to clean the stacking and glass feeding areas for 5 seconds resulted in foreign objects being trapped inside the components;

　　2. Personnel found defects and did not promptly clean up the packaging after marking and reviewing.

　　Component impact:

　　1. Affects the overall appearance of the component Causing complaints.

　　Preventive measures;

　　1. Carry out 5S cleaning for the stacking and glass feeding processes to avoid the occurrence of foreign objects;

　　2. After discovering defects, it is prohibited to make marks on the components and directly record the location of the defects on the process card.

　　3. The placement of products on the production line strictly follows the principle of "three determinations" for labeling and placement.

　　Reasons for component color difference

　　1. Component color difference is caused by uneven coating during raw material processing;

　　2. The welding machine did not distinguish the placement of battery cells by color when placing them;

　　3. Failure to confirm color differentiation in the repair area resulted in mixed film color difference.

　　Component impact:

　　1. Affects the overall appearance of the component Causing complaints.

　　Preventive measures:

　　1. Provide feedback to improve raw materials And strictly inspect the incoming materials with card tubes;

　　2. The welding machine strictly requires color differentiation during feeding to avoid mixing;

　　3. Mark the color grade of the battery cells in the repair area, and perform your own actions during and after rework to avoid color differences caused by using the wrong cells.

keywords：