Battery separator film

  • 06-Jul-2009 11:17 EDT

ExxonMobil Chemical’s two developmental grades of V series co-extruded battery separator films help improve the safety of lithium-ion batteries (LIBs) for hybrid and electric vehicles. Based on the same co-extrusion technology platform and wet bi-orientation manufacturing process as V series separator films, the developmental grades can help prevent thermal runaway in batteries while providing LIB designers more flexibility in selecting electrode systems and formats in battery designs to improve power and capacity density. Developmental grade 1 extends thermal stability with an improvement in transverse direction shrinkage to 8% at 130ºC (266ºF) for 30 min. Developmental grade 2 has an improved shutdown temperature of 128°C (262ºF), compared to 134ºC (273ºF) for a standard V series grade, and maintains a longer insulation period with higher meltdown functionality. The enhanced performance characteristics of the separator films will enable battery companies to develop smaller and more powerful batteries.

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