HJT photovoltaic cell transmission mechanism

Abstract

The HJT photovoltaic cell conveying mechanism comprises a constant-temperature heating furnace, a pushing assembly and guide rail assemblies, the guide rail assemblies are fixedly connected to the two sides of the inner wall of the constant-temperature heating furnace, and the pushing assembly is fixed to the middle of the inner bottom wall of the constant-temperature heating furnace in the length direction of the constant-temperature heating furnace; a draught hood is installed at the top of the constant-temperature heating furnace, and two rows of nozzle assemblies are installed on the two sides of the pushing assembly in the length direction of the pushing assembly. According to the invention, the two opposite lead-in sections can play a guiding role through the arrangement of the lead-in sections, so that the battery piece smoothly enters the middle part of the air suspension section, stable transition is realized, the battery piece can enter the middle position of the air suspension section, and air suspension of the battery piece is realized; the plurality of rolling shafts are driven by the chain, can synchronously rotate and are obliquely arranged, and when the battery piece is located at the leading-in section, the inclined rolling shafts can reduce the contact area with the battery piece to the maximum extent, so that the battery piece is prevented from being abraded.

Description

technical field [0001] The invention relates to the technical field of cell sheet transmission. Specifically, it is the HJT photovoltaic cell transmission mechanism. Background technique [0002] Heterojunction with Intrinsic Thin Layer (HJT) stands for Intrinsic Thin Film Heterojunction, which improves conversion efficiency by inserting an intrinsic amorphous silicon layer between P-N junctions for surface passivation. HJT photovoltaic cells have many advantages Advantage. [0003] The HJT battery structure is completely different from the traditional PREC battery. HJT uses thinner silicon wafers. The thickness of PERC silicon wafers is about 180 μm, while the thickness of HJT battery wafers is reduced to 130 μm. The existing curing furnace uses a mesh belt transmission mechanism, relying on metal mesh belts The upper two rows of protruding oblique supports carry the cells through the temperature field curing, and the stress points of the cells are distributed along the t...

AI Technical Summary

Problems solved by technology

[0003] The HJT battery structure is completely different from the traditional PREC battery. HJT uses thinner silicon wafers. The thickness of PERC silicon wafers is about 180 μm, while the thickness of HJT battery wafers is reduced to 130 μm. The existing curing furnace uses a mesh belt transmission mechanism, relying on metal mesh belts The upper two rows of protruding oblique supports carry the cells through the temperature field curing, and the stress points of the cells are distributed along the two sides. The disadvantages are as follows: 1. Due to the reduced thickness of the cells, the self-stress is insufficient, relying on two After side support, both ends of the cell are prone to warping, which may easily cause cracks or fragments; the relatively thin HJT cell passes through the curing zone and the temperature rises, which intensifies the drop in surface stress, and the part lacking a stress point in the middle sags due to gravity , causing side warping; 2. Due to the shielding of the mesh belt, when the battery is cured at high temperature, there will be uneven curing, and the two rows of metal mesh belts may have asynchronous movement, which is opposite to the battery sheet. Friction, causing the surface of the cell to wear

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