In the structure of a lithium battery, the diaphragm is one of the key inner layer components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. The separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the separator is to separate the positive and negative electrodes of the battery, prevent the two poles from contacting and short-circuit, and also have the function of allowing electrolyte ions to pass. The separator material is non-conductive and its physicochemical properties have a great influence on the performance of the battery. The type of battery is different, and the diaphragm used is different. In the lithium battery series, since the electrolytic solution is an organic solvent system, a separator material resistant to an organic solvent is required, and a polyolefin porous film having a high strength thin film is generally used.
PET film, also known as high temperature resistant polyester film, has excellent heat resistance, cold resistance, oil resistance and chemical resistance. According to its function, it can be divided into PET high gloss film, chemical coating film, PET antistatic film, PET heat sealing film, PET heat shrinkable film, aluminized PET film and so on.
Most of the traditional processing uses die-cutting, but for manufacturers with small batches, multiple varieties, and high processing precision, the mold opening cost is high and the precision is not up to standard. Therefore, the new technology laser cutting has been increasingly used by various PET film processing because of its unique operation, automation, and fine processing. On some films, yellowing can occur with red lasers. Therefore, beyond the use of violet laser "cold processing", "small heat" characteristics, the use of ultraviolet laser cutting PET film, just to make up for the lack of red light processing.
Lithium battery cells and PET film; the thermal insulation barrier film of various electronic devices adopts the advantages of laser cutting machine:
1, the effect is good: purple light cutting is "cold processing", the film material will not cut yellow, the cut is flat.
2, high efficiency: the use of sophisticated interactive workbench, configuration of automatic / manual work mode, to meet customer multi-station production automation needs, improve production efficiency.
3, good performance: the use of the United States imported brand-name violet laser, high beam quality, can achieve ultra-fine marking.
4, high yield: purple light does not produce thermal effects, can avoid deformation of the material being processed, saving materials.
5, environmental protection safety: fully enclosed safety frame to protect the safety of operators.
6, low operating costs: machine operation is simple, no consumables, low power consumption.