{"id":5925,"date":"2023-05-15T16:41:09","date_gmt":"2023-05-15T08:41:09","guid":{"rendered":"https:\/\/www.ray-tron.com\/?p=5925"},"modified":"2023-09-01T14:03:04","modified_gmt":"2023-09-01T06:03:04","slug":"ele-2","status":"publish","type":"post","link":"https:\/\/www.ray-tron.com\/en\/ele-2\/","title":{"rendered":"Solar cell module composition and functions of each part"},"content":{"rendered":"

Solar panels<\/a>There are nine main core components. It includes battery, interconnect ribbon, bus ribbon, tempered glass, EVA, back sheet, aluminum alloy frame, silicone and junction box.<\/p>\n

Solar cell module-composition<\/p>\n

From the cost perspective, the five most expensive auxiliary materials are frame, glass, film, backplane and solder strip. Among them, the frame accounts for the highest proportion of non-silicon costs.Photovoltaic modules<\/a>The core auxiliary materials have an important influence on the final performance of the equipment.<\/p>\n

Today, we will mainly introduce three parts: battery cells, interconnect ribbons, and bus ribbons.<\/p>\n

1. Battery Cell<\/p>\n

A device that converts the photoelectric effect into electrical energy.<\/p>\n

There are many materials that can produce photoelectric effect, such as single crystal silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium copper selenide, and so on.<\/p>\n

Polysilicon material is an electronic material made of industrial silicon. It is purified through a series of physical and chemical reactions to achieve a certain purity. And it is the main raw material for manufacturing silicon polished wafers, solar cells and high-purity silicon products. It is also the most basic raw material for the information industry and new energy industry.<\/p>\n

Globally, the polysilicon industry is currently continuing to shift to China, and the epidemic has accelerated this process. In 2020, the global polysilicon production capacity was 608,000 tons, a year-on-year decrease of 9.9%; the output was 521,000 tons, a year-on-year increase of 2.6%.<\/p>\n

During the same period, my country's polysilicon production capacity was 457,000 tons, down 19,100 t\/y; output was about 396,000 tons, up 15,800 t\/y. Domestic polysilicon production capacity and output growth are significantly ahead of the world, accounting for 751 t\/y and 761 t\/y respectively.<\/p>\n

2. Interconnection ribbon: Series connection of battery cells<\/p>\n

Interconnect ribbon is an important raw material in the welding process of solar panels. Usually, we apply a thermal coating on the outer surface.<\/p>\n

Photovoltaic strips are also known asTinned copper strip<\/a>It refers to a tin-based solder with uniform thickness coated on the surface of the copper strip. Usually, we use it to connect the cells of photovoltaic modules to play the role of conductivity and electricity collection.<\/p>\n

The cost of photovoltaic ribbons 90% comes from copper and tin as raw materials. In other words, the current bulk prices basically determine the production costs. In addition, the technical content of the welding ribbon is also very low, the market competition is sufficient, and the bargaining space is small.<\/p>\n

3. Busbar: A carrier that connects battery strings<\/p>\n

As for the structure of the busbar, copper, aluminum or copper-plated aluminum with high conductivity is usually used to prepare the busbar. However, copper or aluminum materials have poor corrosion resistance.<\/p>\n

Therefore, copper, aluminum or copper-aluminum sinkers are easily corroded during use, which reduces the performance of the sinker and shortens its service life. At the same time, tin (or tin alloy) has relatively superior wear resistance and corrosion resistance, and can be used for a longer time in natural environments or corrosive environments. However, due to the low conductivity of tin (or tin alloy), it cannot be used alone to preparePhotovoltaic busbar<\/a>.<\/p>\n

In order to compensate for these defects, a tin-coated copper busbar was developed by combining copper with a relatively high electrolytic rate and tin with relatively good corrosion resistance.<\/p>\n

This photovoltaic busbar not only has good electrical conductivity, but also has corrosion resistance. This means that the use environment is not easily corroded. However, although copper has good electrical conductivity. But the thermal conductivity is not good, and compared with the high price of aluminum, the mass is large, which increases the product and transportation costs.<\/p>\n

In view of the defects existing in the prior art,Raytron<\/a>The company provides a composite busbar with good electrical and thermal conductivity, low price and light weight.<\/p>\n

A new composite busbar<\/p>\n

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