Quality control in the production process of solar cell welding

Oct 18, 2021 tinned solder tape and flux

Quality control in welding production process

(1) Count the types of defects in the welding production process. Common defects in the welding production process include foreign matter in the components, splits, chipped corners, broken corners of the cell, the gap between the cell string and the string, the uneven distance between the bus bar and the cell, and the bubbles and scratches on the glass. , There are virtual welding and missing welding on the battery electrode, the welding of the welding strip appears dislocation, the chromatic aberration of the battery exceeds the standard, and the EVA or PET cut size is too large or too small.
(2) Using analysis methods such as Pareto chart and fishbone chart in the quality management tool, make corresponding analysis charts for the number of various defects counted.
(3) Analyze and list the reasons for each defect from the chart, as shown in Figure 1.

Figure 1 Fishbone diagram of objects appearing in photovoltaic modules in the welding production process

(4) Through the analysis of various causes, find a reasonable and scientific solution for each cause.
(5) Formulate reasonable and scientific measures and implement them vigorously.
① People:
(A) Increase the technical training for new employees.
(B) Improve the technical proficiency of employees.
(C) During work, control any accessories and leaking items on the clothing of employees.
(D) Enhancing employees’ understanding of process quality issues.
② Ring:
(A) Do the “6S work” of the workshop every day, separate the welding room from the rest of the workshop processes, and prohibit personnel from other processes from walking in the welding room.
(B) In summer, place mosquito-killing equipment in the welding room.
③Machine: Maintain and clean the equipment daily.
(A) Intensify the inspection of incoming raw materials to ensure strict entry and wide exit.
(B) Resolutely not use the raw materials that do not meet the process requirements and report to the team leader.
(C) Similarly, the EVA cutting room must be separated from other processes, and the work surface of the cutting room must be kept clean and free of other foreign objects.
⑤ Method:
(A) Strengthen employees’ awareness of details, so as to know what is and why.
(B) Explain to employees the reason why they cannot move too violently during the operation, and raise their awareness.
(C) Start solving the defects with the highest proportion among the defects, and then solve the defects with the low proportion one by one.
(D) According to the method of weekly statistics, summarize and check the effect of implementation by the end of the month.
(E) Perform assessment of each process in accordance with the frequency of defective defects.
(F) Provide effective process training to employees on a regular basis to improve their quality awareness.
(G) Use a lot of practical forms and 8D reports.