E-Mobility Engineering 016 l Aurora Powertrains eSled dossier l In Conversation: Thomas de Lange l Automated manufacturing focus l Torque sensing insight l Battery Show Europe 2022 report l Sodium batteries insight l User interfaces focus

silicone-based material for battery thermal management applications, along with polyurethane (PU) materials from the Voratron range. A two-part, soft, thermally conductive material, TC-5533 is designed to dissipate heat and relieve mechanical stresses between battery modules and cooling plates. With a thermal conductivity of 3 W/mK, it also has a low density, of 2.6 g/millilitre. Characteristics that ease its use in battery manufacture include low and stable dispensing pressures from drums, low abrasion and very low stresses during assembly. It is also formulated for a long working time of more than 90 minutes at 25 °C, with a cure time of less than 18 hours at that temperature, and for low emission of siloxane volatiles, less than 100 ppm. It is also designed to be reworkable, with low pull-off forces to ease repair and recycling. Other silicone materials have been designed to enable long-term module/ pack operational stability, while also providing fire protection in the case of a thermal runaway. The Voratron brand is a range of PU systems that enable the development of thermally conductive and non- thermally conductive adhesives, gap fillers and pottants/encapsulants for a broad range of battery types, including those based on prismatic, pouch and cylindrical cells. Dow displayed materials from both its silicon and PU ranges in a case reminiscent of a car battery pack. “We’re showing high-strength adhesives used to assemble battery cells or install them into modules to provide structural strength as required,” said John McKeen. “Both PU and silicone foams can be used to help deal with mechanical stress and thermal runaway,” he added, “and both PU and silicone gap fillers are available with a range of thermal conductivities of 1 to 1.5 at the lower end and from 3 to 6 with the silicone at the higher end.” capability, which is unique for a plastic that isn’t a multi-component material. There are composites that will do that – some of them very exotic – but this is a regular solution that you don’t have to pay a king’s ransom for.” The company also launched its Bluehero umbrella initiative for its automotive plastics expertise spanning the materials, application, design and manufacturing knowhow at the show. Dow presented new silicone- and polyurethane-based gap fillers, adhesives, pottants and battery enclosure materials at the show, which also provided the first opportunity for an insight into the company’s MobilityScience platform. This is intended to meet changing industry needs through materials science and support of customers’ development of applications, said Dr Esther Quintanilla. “The idea is to bring the best combination of materials in our portfolio together and offer solutions using different technologies,” she added. Among the Dowsil range of thermally and electrically conductive solutions, Dow introduced TC-5533 Gap, its 52 Winter 2022 | E-Mobility Engineering Dow module with cylindrical cells illustrating polymer gap fillers adOesives and enclosure materials :tamped out of tOin sOeet aluminium 0nterplex»s Iattery connection systems integrate Oundreds of individual connections to cells into one large component optimised for automated welding