An interconnection method to seamlessly connect silicon-based solar cells

Abstract

The invention discloses an interconnection method for seamlessly connecting silicon-based solar cells, which includes a whole battery, a front main grid, a front sub grid, and a back main grid. Grids and front sub-grids, the front sub-grids are arranged in parallel at equal distances, and the front sub-grids are vertically placed and connected to the front main grid; the interconnection method applied to seamlessly connect silicon-based solar cells, by dividing the entire battery Used for multiple small cells, it can greatly improve the uniformity of small cells in the module, reduce the overall series current, and reduce the power loss of the module. In addition, the vertical connection between the ultra-short solder strip and the front main grid can greatly shorten the required solder strip The length can effectively reduce the resistance loss caused by the welding ribbon. By setting a gap at the edge of the small battery, the seamless connection is realized, which makes the product packaging area smaller, saves the cost of packaging materials, is beautiful, and has higher power generation per unit area.

Description

technical field [0001] The invention relates to a component manufacturing process, in particular to an interconnection method for seamlessly connecting silicon-based solar cells. Background technique [0002] Solar cells (solar chips, photovoltaic cells) are photoelectric semiconductor sheets that use sunlight to generate electricity directly. As long as it is illuminated by light that meets certain illumination conditions, it can instantly output voltage and generate current with a loop. It is called solar photovoltaic (Photovoltaic, abbreviated as PV) in physics, or photovoltaic for short. Photochemical effect or photochemical effect is a device that directly converts light energy into electrical energy. The crystalline silicon solar cell that works on the photoelectric effect is the mainstream, while the thin-film battery that works on the photochemical effect is still in its infancy, and a single solar cell cannot be directly used. For the use of power supply, as a powe...

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Problems solved by technology

[0003] In the existing traditional interconnection method of solar cells, both the front and back main grids are covered by ribbons, and in order to reduce the series resistance of the ribbons as much as possible, it is desired to increase the width and thickness of the ribbons and reduce the length of the ribbons , the larger the area where the ribbon shields the battery from light, the greater the thickness of the ribbon, and the more packaging materials are used, which increases the packaging cost. When the ribbon is shorter, it is necessary to increase the number of busbars to fully collect the current. Increased the amount of slurry used in the cell, the loss outweighs the gain

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