Low-resistance crystalline silicon solar cell component

Abstract

The invention relates to a low-resistance crystalline silicon solar cell component which comprises a solar cell, wherein a front surface main grid line of the solar cell comprises a reflection section grid line and a welding section grid line, the width of the reflection section grid line is less than that of the welding line grid line, the width of the welding section grid line is 2-5mm, and the width of the reflection section grid line is 0.1-0.8mm. A back surface electrode main grid line is arranged on the back surface of the solar cell, the back surface electrode main grid line comprises a wide welding section corresponding to the welding section grid line on the front surface and a narrow grid section which is connected with the wide welding section and extends to the middle part of the back surface. By adopting the low-resistance crystalline silicon solar cell component, the light loss and the resistance loss of the solar cell component can be reduced, the optical loss can be reduced by 2-4%, and the power of the solar cell component can be improved by 4-6%.

Description

technical field [0001] The invention relates to the technical field of solar cell components, in particular to a low-resistance crystalline silicon solar cell component. Background technique [0002] Crystalline silicon solar cell modules are generally made up of dozens of solar cells connected in series and packaged with protective materials. There are several ways to improve the efficiency of solar cell modules: improve cell efficiency; reduce optical loss of components; reduce connection resistance of solar cells. In terms of improving battery efficiency, many researchers have improved the spectrum absorption of the battery itself from the aspects of selective emitters, back electrodes, and heterojunction batteries, reducing the power loss caused by battery resistance; on the other hand, from improving the component materials including glass, The optical properties of EVA, high-transparency silicone, and the back surface, and the research work on optimizing the electrica...

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Problems solved by technology

[0004] Sunpower's backside contact cell adopts back-buried grid line technology, which reduces front-side optical loss and series resistance, but the process is relatively complicated and the cost is high; in terms of reducing optical loss, Asberg Ingma et al. proposed a micro-V-groove design, The included angle is 110-130°, the surface reflective layer is made of Ag, Al, Au or reflective polymer material, the V-shaped effective reflective part is located between the cell gap and the main grid line of the battery, and the reflective soldering tape passes through the planar tentacles at the left and right ends of the V-shaped and The back of the cells is connected to reduce the light loss of the module, but this design makes it difficult to weld the cells, and it is not easy to reduce the connection resistance of the cells

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