Production process of low and medium power concentrating solar cells and solar cells

Abstract

The invention discloses a production process for a medium-low-power concentrator solar cell and a solar cell piece. Multiple medium-low-power concentrator solar cell units are manufactured on a produced 125mm*125mm or 156mm*156mm crystalline silicon solar cell piece; and the concentrator solar cell units can be cut off from the crystalline silicon solar cell piece by diamond or laser. The production process is improved on the basis of an original common crystalline silicon solar cell production process; and the low-cost patch type medium-low-power concentrator solar cell is further manufactured by utilizing the common crystalline silicon solar cell production equipment and process.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a production process of a medium-low power concentrating solar cell and a solar cell sheet. Background technique [0002] In the current photovoltaic photovoltaic system, the market share of crystalline silicon solar cells accounts for more than 80%, and the flat panel components of crystalline silicon solar cells are mainly composed of solar ultra-clear glass, adhesive (EVA), solar cells (single crystal or polycrystalline) , the backplane material and the aluminum alloy frame are produced through a series of processes (such as: sorting, welding, lamination, frame packaging, etc.). Although the price of crystalline silicon solar cell components has dropped, there is still a big gap compared with traditional electricity costs such as thermal power and hydropower, and one of the most important factors is the price of solar cells. [0003] Most of the c...

AI Technical Summary

Problems solved by technology

The cells used in high concentration photovoltaic technology are generally multi-junction compound solar cells. Due to the complex production process and the raw materials used are rare elements such as arsenic, germanium, indium, etc., the cost is very expensive. The requirements for heat dissipation and heat dissipation are extremely high, which restricts its development

The cells used for low-to-medium magnification concentrating photovoltaics are generally crystalline silicon solar cells, and because there is currently a lack of batteries specially designed for low-to-medium magnification concentrating photovoltaic technology, the sources of the batteries are generally obtained through 156*156mm or 125*125mm cells are obtained by diamond or laser cutting, and cutting will inevitably lead to a decrease in the efficiency of solar cells, which leads to an increase in the cost of the entire component and restricts its development

At the same time, because it is obtained by cutting crystalline silicon solar cells, and the positive and negative poles of crystalline silicon solar cells are generally distributed on both sides of the solar cell (generally, the front is the negative electrode, and the back is the positive electrode). Negative poles are connected in series and parallel. For solar cells with a size of 125*125mm or 156*156mm, due to the large size, manual welding or mechanical welding can be used. For medium and low power concentrator solar cells cut into small sizes, However, due to the small size and poor mechanical properties, it is easy to be damaged or poorly welded, which reduces production efficiency and yield, and greatly increases component costs

However, if crystalline silicon concentrating solar cells with a smaller size (5mm-30mm) are to be independently produced, the production cost will be very high, and the process will be more difficult, because the size of the cells produced by current crystalline silicon solar cell manufacturers is generally Both are 125*125mm or 156*156mm

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