Hybrid BC battery technology has become increasingly mature, and BC equipment will be very popular
time：2024-01-04 17:11:14 views：0

What is a BC battery

Silicon cells, whether P-type or N-type, are made of silicon into PN sections and generate electricity by the photovoltaic effect of PN sections.

The most traditional way is to make one side of the silicon wafer into a P region, that is, the positive electrode, and the other side into an N region, that is, the negative electrode, and then lead the wire from the positive and negative terminals, you can generate electricity. These wires are welded with very thin silver paste, also called grid lines, that is, we see a grid of silver lines on the surface of the photovoltaic module. The grid line is on the front side of the battery and the back side, and the one on the front side will block part of the surface of the battery, reducing the light area and affecting the power generation efficiency.

The biggest feature of BC battery is that there is no grid line on the front, no reflection loss in light irradiation, and it has significant advantages in power generation. According to the verification in Henan and Hebei region, its single-watt power generation is about 2%-3% higher than TOPCON. Because there is no grid line on the front of the BC battery, the product looks beautiful, which is suitable for household and industrial and commercial roofs and other use scenarios, and is conducive to distributed market promotion.

BC Battery Advantages

The back of the BC battery is no longer a simple N region or P region, but the P and N regions are prepared on the back of the battery at interfinger-like intervals, and the back can have both positive and negative electrodes, and it is thanks to this structure that all the grid lines can be completely welded to the back of the battery. That is to improve the efficiency of power generation and improve the appearance of the front.

Hybrid BC battery

Hybrid BC cells are more than 1.5% more efficient than heterojunction (HJT) cells, and their combination with translucent perovskite cells further improves the conversion efficiency of stacked cells. The perovskite/hybrid BC four-terminal stack cell offers the following advantages:

1) High conversion efficiency: Perovskite/hybrid BC four-terminal laminate battery utilizes the advantages of perovskite battery and hybrid BC battery, and avoids the limitation of current matching on performance, to achieve maximum solar utilization and conversion efficiency, so as to obtain higher battery conversion efficiency.

2) Simple process: the perovskite/hybrid BC four-terminal laminated battery is only through optical coupling, and does not need to consider the process compatibility problem caused by the current matching between the top battery and the bottom battery, and the process is relatively simple.

3)Production line compatibility: The combination of perovskite cell production line and silicon-based BC production line can be used for the preparation of the four-terminal lamination, without the need to modify the existing production line.

BC technology is becoming more and more mature

Hybrid BC battery technology has become increasingly mature, and its combination with perovskite batteries will create higher battery conversion efficiency. It is believed that in the near future, perovskite/hybrid BC laminated batteries will achieve a conversion efficiency of more than 35%!

Combined with the above, the future BC battery will become the absolute mainstream of crystalline silicon batteries.

ChinTiyan New Energy(Hubei）Co.，Ltd is a high-tech enterprise specializing in the research and development and production of photovoltaic module automatic production line equipment. The company has targeted the diversified needs of the market through long-term market research and customer feedback. Developed advanced technology, strong compatibility BC high speed series welding machine, BC low speed series welding machine, BC high speed lossless scribing machine, BC low speed lossless scribing machine, scratch welding machine, laser border marking machine and other 6 types of equipment shock the market. Product independent research and development design, can provide customers with one to one differentiated customization, help enterprises to achieve production capacity improvement.