What are the problems with the lamination process of soft-pack lithium batteries?

Soft-packed cells are typically fabricated in a lamination process rather than the usual winding method used for prismatic battery cells. In the process of die-cutting and lamination of soft-package batteries, the generated burrs and dust are likely to cause short-circuit of the battery, which causes great battery safety hazard. Therefore, it is particularly important to control the burr dust in the production process of the soft-pack battery.

Pole piece burr is refers to the sheet cutting section base material produced by tensile, bending. In die cutting and lamination process control when cutting burr size, reducing cutting dust produced in, and avoid burr in the process of sheet transfer, has become the two processes of the main problem of the current, and to solve these problems, first to understand the cause of burr and dust.

Pole piece burr of the main causes of dust produced three things: 1) cutting way;2) the structure of the punching die;3) the material of the die and cutting machining accuracy.

The solution, according to the reasons of the burr and dust, the future can be promoted from the following aspects:

1, Optimize the existing mould structure;

2, Improve the mould manufacturing and assembly accuracy;

3, Choose laser die cutting machine;

4, The die-cut lamination machine can be used to directly enter the lamination platform after the pole piece is punched, to avoid the collision and friction between the pole piece and the material box, and completely solve the potential risk of the pole piece defect.

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