Crystalline silicon solar battery positive electrode screen printing plate

Abstract

The invention discloses a crystalline silicon solar battery positive electrode screen printing plate and belongs to the technical field of a solar battery. The crystalline silicon solar battery positive electrode screen printing plate comprises a screen frame and a plurality of mesh yarns arranged on the screen frame, wherein the mesh yarns are coated with a latex film layer, the latex film layer is provided with a positive electrode pattern, and the positive electrode pattern comprises a plurality of crossed primary grid wires and secondary grid wires; the mesh yarns comprise a plurality of vertical mesh yarns and transversal mesh yarns which are vertically crossed, the vertical mesh yarns are successively arranged on the screen frame in parallel at equal intervals, the transversal mesh yarns are successively arranged on the screen frame in parallel at equal intervals, and the interval between adjacent two vertical mesh yarns and the interval between adjacent two transversal mesh yarns are the same; and the primary grid wires are arranged in parallel between adjacent two transversal mesh yarns, the secondary grid wires are arranged in parallel between adjacent two vertical mesh yarns, and the quantity of the primary grid wires is smaller than that of the secondary grid wires. The solar battery positive electrode screen printing plate, while improving the electrode conductivity, improves the photoelectric conversion efficiency of a battery, can reduce EL broken grid proportion of a secondary grid at the same time, and improves the appearance qualified rate of the battery.

Description

technical field [0001] The invention relates to a positive electrode screen, in particular to a positive electrode screen of a crystalline silicon solar cell, belonging to the technical field of solar cells. Background technique [0002] A solar cell is a device that effectively absorbs solar radiation energy and converts light energy into electrical energy by using the photovoltaic effect. When sunlight shines on a semiconductor P-N junction (P-N Junction), a new hole-electron pair (V-E pair) is formed. ), under the action of the P-N junction electric field, holes flow from the N region to the P region, electrons flow from the P region to the N region, and a current is formed after the circuit is turned on. [0003] The manufacturing process of crystalline silicon solar cells has 6 processes, namely texturing, diffusion, dephosphorous silicon glass and back junction, coating, screen printing, and sintering. Among them, screen printing is used to manufacture solar cell elec...

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Problems solved by technology

The number of main grids is less than the number of auxiliary grids, and the width of the main grid is much larger than that of the auxiliary grids. However, the height of the auxiliary grids cannot be set too low, and the width cannot be set too small. The silver paste forms a positive electrode on the auxiliary grids. When the line is used, there are disadvantages that the aspect ratio of the positive electrode sub-grid line is small, and the photoelectric conversion efficiency of the battery is low.

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