Preliminary knowledge of photovoltaic module production

Preliminary knowledge of photovoltaic module production

1. Description of production process

The basic flow chart of solar cell module processing during normal production is given in Figure 1. The so-called basic flow chart simply describes the normal workflow, excluding the handling of abnormal situations, and other specific issues will be described in detail in the following chapters.

It should be noted that each production unit classifies the inspection part (such as intermediate inspection, infrared inspection, and final inspection) in the production process into quality management according to their actual situation to monitor and measure the abnormality in production. . In any case, these three key links are important links to directly assess whether a module is good or bad, and need to be paid attention to.

Preliminary knowledge of photovoltaic module production
Figure 1 – Basic flow chart of solar cell module production

The process of “insulation inspection” is not given in Figure 1, and usually some units do not have this inspection. From the design point of view, it is not difficult to achieve the specified dielectric strength of the modules, and it is difficult to see the phenomenon that the dielectric strength cannot meet the requirements in the previous experimental tests. However, as a manufacturer of power generation equipment, this test is indispensable.

The content of the “material preparation” process varies from company to company. Usually, “cell sorting” and “cell cutting” are also included, which are related to the actual characteristics of their production enterprises. When some companies purchase or produce cells by themselves, they have already sorted cells according to the requirements of module production, and this process can be removed in actual production. Some large-scale enterprises usually do not process modules produced by cutting batteries, because they are not suitable for mechanized and mass production, especially for automated production lines.

2. Material list

Cell: TDB 125 x 125 x Φ169, 72 pieces.

Glass (Safety Glass): 802mm (width) x 1574mm (length) x 3.2mim (thickness), 1 piece.

EVA Hangzhou Frist PV Material F806, 1580mm (length) x 810mm (width) x 0.5mm (thickness), a total of 2 sheets, gasket = 640mm x (length) x60mm (width), a total area of 2.7m2. ,

Backplane (TPT) and partition: backplane 810mm x 1580mm, partition 640mm x60mm, KREMPEL TPL, 3-38/25 x 810mm (PTL3HR), one backplane and one partition each, with a total area of  1.4m2.

Cell Connector: 1.5mm x 0.15mm; Length: 220mm, Quantity: 132; Length: 160mm, Quantity: 24.

String Connector: 5mm x 0.2mm; Length: 220mm, Quantity: 2; Length: 195mm, Quantity: 3; Length: 330mm, Quantity: 2; Length: 75mm, Quantity: 4.

Aluminum alloy frame (Frame): 1580mm x 808mm x 42mm, one set

Junction Box: Renhe Photovoltaie Technology, PV-RH0502B, 1 piece, wiring length: 850mm

Silicon Glue: Dow Corning PV-8101F, 1/2 tube

High temperature tape: 3MUV-1, width: 5mm, length: 200mm

Ordinary tape: width: 8mm, one roll.

Flux: Asahi Solder Technology ANX-3133, 100g.

Label paper: 85 mm x 90mm, 1 pc.

Barcode: 5mm x10mm, 5 pieces.

QC label: 1 pc.

3. Tools and instruments

The tools and instruments used in the production process of solar cells and modules are shown in Figure 2.

Preliminary knowledge of photovoltaic module production
Figure 2 – Tools and Instrumentation

4. Qualified range of modulent test data

The test data of the modules are related to the standards used in production, as well as the state of inspection equipment and raw materials. The data listed in Table 1 and Table 2 are for reference only. The data listed in Table 1 are parameters obtained by simplifying the test. Some manufacturers use terminal testers, and the obtained parameters form a curve, which is more conducive to performance evaluation. But it should be noted that it is normal for the test data to have a large deviation, but when testing the same data on the same device, the deviation should not be too large, otherwise it will be a measurement error. Table 2 is the final test data reference value.

Preliminary knowledge of photovoltaic module production
Table 1 – Reference value of test data in the middle test
Preliminary knowledge of photovoltaic module production
Table 2 – Reference value of final test data