Silicon ingot, crucible, silicon ingot casting method and solar cell silicon wafer manufacturing method

Abstract

The invention discloses a silicon ingot, a crucible, a method for casting a silicon ingot and a method for making a solar cell silicon wafer. The silicon ingot involved includes several silicon ingot sub-units which are cut along a plane perpendicular to its own thickness direction to obtain solar battery silicon wafers , a number of silicon ingot units are integrally formed and distributed in a matrix, each silicon ingot unit has a through groove that runs through its thickness to form its side hole after the solar cell silicon wafer is manufactured; the solar cell silicon made of silicon ingots provided by the present invention The chip can be better adapted to the small-pitch series connection of battery cells in the assembly process of photovoltaic modules. It can avoid increasing the fragmentation rate in the process of making photovoltaic modules while reducing the distance between two adjacent battery cells, and effectively reduce the cost of photovoltaic modules. The production cost of a single tile; in addition, silicon material can be effectively saved when the crucible provided by the present invention is used to produce silicon ingots, thereby reducing the production cost of silicon ingots.

Description

technical field [0001] The invention relates to the field of solar cell production, in particular to a silicon ingot, a crucible, a silicon ingot casting method and a solar cell silicon chip production method. Background technique [0002] When assembling solar photovoltaic modules, adjacent solar cell units in the same battery string are connected through interconnection bars, and the interconnection bars connect the front electrode of one solar cell unit with the back electrode of adjacent solar cell units, thereby realizing the solar cell series connection of units. In the prior art, reducing the distance between two adjacent solar cells to increase the number of cells in the same panel type module can better increase the sunlight absorption area of ​​the module, thereby increasing the power of the photovoltaic module. [0003] However, in the prior art, when the distance between two adjacent solar cell units is reduced, the curvature of the interconnection bar connected...

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Problems solved by technology

[0003] However, in the prior art, when the distance between two adjacent solar cell units is reduced, the curvature of the interconnection bar connected between the two solar cell units will be increased, so that in the lamination process of interconnection bar welding and later component assembly, Solar cell units are prone to fragmentation, that is, have a large fragmentation rate, which leads to an increase in the production cost per watt of photovoltaic modules

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