Nonwoven pads that, when fitted inside battery packs, can absorb fluids that would otherwise shorten the lifespan and hinder the performance of lithium-ion batteries have been launched by Freudenberg Performance Materials of Weinheim, Germany. Liquid carried in air can condense inside battery packs and coolants can leak from the systems used to maintain their temperatures. In both cases, Freudenberg Performance Materials says that its Battery Pack Liquid Absorbers can capture and retain these liquids quickly and reliably. The pads comprise cover layers of a thermally bonded polyester (PES) non-woven sandwiching layers of a hydrophilic nonwoven covered in a highly absorbent coating.The pads have a liquid-absorption capacity of 30 l.m~(-2), are resistant to temperatures of up to 230°C in the short term and 110°C in the long term, and have achieved an HB rating when tested according to the UL 94 standard from Underwriters Laboratories (UL) of Northbrook, Illinois, USA.
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