High-power solar assembly with dual junction boxes and production method thereof

Abstract

The invention discloses a high-power solar assembly with dual junction boxes and a production method thereof. The solar assembly is provided with an anode junction box (18) and a cathode junction box (17); each junction box is only provided with a lead; an anode lead (20) is led from the anode junction box (18); a cathode lead (19) is led from the cathode junction box (17); two junction boxes are matched for use; battery strings (1, 2, 3, 4, 5, 6, 7 and 8) form a cathode series circuit; five lead-out wires are led out of the cathode series circuit to penetrate through a back plate and are connected with the cathode junction box; battery strings (9, 10, 11, 12, 13, 14, 15 and 16) form an anode series circuit; five lead-out wires are led out of the anode series circuit to penetrate through the back plate and are connected with the anode junction box; and the anode series circuit and the cathode series circuit are connected in the inside through bus bars (21) to form a complete series circuit. The solar cell assembly obtained by using the production method disclosed by the invention has high efficiency and low reject ratio.

Description

technical field [0001] The invention relates to a solar component and a production method, in particular to a double junction box high-power solar component and a production method. Background technique [0002] Solar photovoltaic modules are devices that directly convert sunlight energy into electrical energy through the photovoltaic effect. When sunlight hits the surface of the battery module, photoelectric current will be generated. Generally, a single solar cell cannot meet the normal use requirements. It is necessary to combine several solar cells through auxiliary materials such as ribbons, busbars, EVA, backplanes, and glass through lamination packaging, and then install aluminum alloy frames. The box will generate the current output and become a complete solar module. The greater the number of cells, the greater the output power of the solar module. [0003] At present, solar photovoltaic modules generally use a photovoltaic junction box. Due to the limitation of t...

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Problems solved by technology

[0003] At present, solar photovoltaic modules generally use a photovoltaic junction box. Due to the limitation of the terminal posts in the junction box, the number of battery strings is generally 6 strings, 8 strings or 10 strings, which cannot be used as a higher power module.

In the process of solar module production, the ribbons and busbars used are generally slightly longer than the actual size. After the ribbons and busbars are welded in the lamination process, the excess ribbons and busbars need to be trimmed. On the one hand The operation steps are increased. On the other hand, if the trimmed part falls into the component and is not found, it will cause defective components and affect the yield of the product.

Moreover, the welding temperature used in existing solar modules is generally above 340°C, the higher the temperature, the greater the risk of welding cracks

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