Trimming knife for crystalline silicon solar battery packs

Abstract

The invention provides a trimming knife for crystalline silicon solar battery packs. A knife blade is nested in a knife handle and is positioned on the same axis with the knife handle; a knife edge is positioned right ahead of the knife blade and is concaved inwards; and a rubber sleeve is sleeved at a sharp-angled part at the front end of the knife blade. The trimming knife has a simple structure, and is safe, convenient and labor-saving when in use; hot melt adhesive membranes (EVA) and back membranes on the edges of glass can be completely cut clean without leaving any residue, so the quality of the battery packs is effectively guaranteed; more than one-hundred solar battery packs can be repaired if the knife blade is polished at one time, so the production efficiency is high; and the knife blade can be repeatedly polished, so the production cost is reduced.

Description

technical field [0001] The invention relates to a processing tool for a crystalline silicon solar battery component. Background technique [0002] There is a lamination process in the production process of crystalline silicon solar cell modules. Tempered glass, hot-melt adhesive film (EVA), battery array, hot-melt adhesive film (EVA), and back film are laminated in sequence and then placed on a laminating machine. Vacuumize, heat and pressurize inside to make it a whole. Laminates require hot-melt adhesive film (EVA) and back film to cover the glass surface, but both are shrinkable and will shrink after being laminated by the laminator, so hot-melt adhesive film (EVA) and The cutting size of the back film is larger than that of tempered glass. After the lamination is completed, the excess hot-melt adhesive film (EVA) and the back film on the edge of the glass are cut off. This process is called trimming. [0003] Trimming is to use a knife to trim off the backplane and hot...

AI Technical Summary

Problems solved by technology

When the laminate comes out of the laminator, the temperature is around 140°C, and the characteristic of the hot melt adhesive film (EVA) is that when the temperature is higher than 80°C, it is relatively soft and easy to trim, but it has fluidity and adhesion. Not strong, at this time trimming is easy to cause delamination between hot melt adhesive film (EVA) and tempered glass, hot melt adhesive film (EVA) and back film, so thermal trimming cannot be done; only when the temperature of hot melt adhesive film (EVA) is low After 50°C, the bonding strength is strengthened, and the trimming operation can be performed, but the hot-melt adhesive film (EVA) also hardens immediately, and it is difficult for ordinary cutting tools to repair the hot-melt adhesive film (EVA) and the back film on the edge of the glass. cut off

At present, the most common trimming tool used in the industry is the utility blade. Although the blade is sharp and the blade is easy to replace, it has the following disadvantages: 1. The cutter head is too shaken, and it swings from side to side when the force is applied. After the trimming is completed, the edge of the glass Hot melt adhesive film (EVA) and back film burrs will remain, and the ideal trimming effect cannot be achieved; 2. The quality of the blade is poor, fragile, the handle is easy to wear, the safety factor is low, and the back film of the component is often scratched during trimming Incidents that cause the entire component to be scrapped occur. In addition, due to the absence of protective devices, injuries to the operator or others often occur.

3. The blade is easy to wear, and the edge of the blade will become blunt after repairing two components with one blade, and the blade needs to be replaced before trimming can be performed again, which affects production efficiency and increases production costs

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