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Li-ion Battery Separator Foil Cutting Using Nanosecond UV Lasers

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Li-ion Battery Separator Foil Cutting Using Nanosecond UV Lasers

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In the quest for clean energy, many advances have been made in lithium-ion battery manufacturing technologies in recent years. The increase in the use of mobile devices and electrical vehicles are directly related to the growth of the battery manufacturing industry to produce higher capacity compact, longer lasting batteries that can operate safely. Typical Li-ion battery cell structures consist of three layers of foils: anode, separator, and cathode foils, as shown in Figure 1. The separator foil is a permeable membrane placed between a battery’s anode and cathode foils. The primary function of the separator foil is to prevent physical contact and electrical short circuit between the anode and cathode, while facilitating ion transport in the cell that is needed for battery operation. Separator foils are typically milky white colored 10~30 μm thick porous films with high wettability, mechanical strength, and thermal stability.

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