Battery systems in electric vehicles include demanding environmental, mechanical, and chemical requirements while emphasizing safety and weight reduction. The material chosen for automotive battery covers must be lightweight, inexpensive, flame retardant, and meet rigorous electrical barrier and insulation requirements. To reduce OEM costs under maintenance service agreements, the battery cover material must be strong and serve reliably.
Formex electrical insulation material meets all of these requirements, and unlike materials that need to be molded into parts, Formex is easily and economically formed into complex three dimensional parts by die-cutting, scoring, and bending. Its long-term thermal aging capabilities have been long recognized in other applications, making it ideal for reliable service in automotive environments. In addition, Formex is resistant to most battery chemistries.
Formex delivers superior performance in comparison to other battery cover materials such as aramid paper. Aramid paper absorbs significantly more moisture, is less dimensionally stable, is more expensive, and does not provide score and fold capabilities. Because Formex is a better electrical insulator, thinner product can be used to reduce weight.
ITW Formex is part of ITW Corporation, a Fortune 200 Company with headquarters in Glenview, Illinois and more than 750 independent operating divisions in over 50 countries. Formex Insulation Material was developed by the ITW Technology Center in 1985. Headquartered near Chicago, the ITW Formex operation division provides technical and sales assistance, distribution, and production globally from multiple locations in the United States and Asia.