AUTOMOTIVE | COMPOUNDS FOR EVs
Right: PA and PBT-based compounds from Lanxess are being used in charging infrastructure for electric mobility
plane thermal conductivity is required. There’s more to the EV automotive
revolution than the cars, however, with the most notable opportunity in infrastructure such as charging stations. Lanxess sees great potential for technical thermoplas- tics in such applications, which blend the performance require- ments of the electrical and elec- tronics (E&E) and automotive industries. “Both industries have for decades been a core business for our polyamides and polyesters,” says Sarah Luers, Project Manager in E&E Application Development in the High Performance Materials (HPM) business unit. “This is why we can already offer custom materials that meet the most important standards and specifications of the international E&E and automotive industries and are ideal for use in charging infrastructure.” The company says that the level of standardisa- tion in the field of electric mobility currently has a long way to go. However, it adds that its Durethan PA and Pocan PBT materials are already being used in charging plugs and sockets, charging stations and wall boxes in garages and carports, as well as for components in inductive, wireless charging systems for high-voltage batteries.
E : L A N X
Charging options Unreinforced materials are mainly used for charg- ing plugs because they offer a high level of dimensional stability and surface quality, are impact resistant, and so are mechanically robust, and are available as flame-retardant compounds for where they come into contact with live elec- tronic parts. “One example is the halogen-free flame-retardant polyamide 6 Durethan B30SFN30,” says Luers. “In flammability tests conducted in accordance with the US standard UL94, it achieves the top classification of V-0 with a test body thickness of 0.75mm.” For thin-walled components such as plug handles, which do not necessarily have to be flame-retardant, it says its Durethan B30S grade is an appropriate choice. Lanxess says another current development
trend is towards inductive and wireless charging of vehicle batteries. The flat floor and vehicle pads required to accommodate the inductive charging coils have to be constructed from materials that are not only fire-resistant and mechanically strong, but also have a low tendency to warp and exhibit high dielectric strength. The materials also have to be
78 COMPOUNDING WORLD | April 2021
light and weathering-resistant, with properties that remain stable across a temperature range of -45°C to +125°C. It sees its Durethan BG30XFN01 PA6, which combines glass fibre and glass sphere reinforcement, as a potential solution. It exhibits good flow and resistance to warping and meets UL 94 V-0 requirements at 0.75mm. It also has a UL f1 listing for use in outdoor applications exposed to UV and water. Electric vehicles place new
requirements on plastics, especially with regard to the high voltages
used. According to Turkish compounder Tisan, that means designers are looking
for advanced polymers that provide the required electric insulation without compromising mechani- cal performance and dimensional stability. Spe- cialty compounds with low initial mould shrinkage, minimal moisture absorption and that meet UL 94 V-0 flame resistance are in demand with PA and PBT compounds common options. Tisan’s Tislamid line of polyamide compounds includes a number of short glass fibre reinforced grades used for electric vehicles. Tislamid 30D03 F01 K02 K06 R02, for example, is a 30% glass reinforced, hydrolysis and heat stabilised, flame retardant PA66 that is being used in a Li-ion battery application while Tislamid B 30D03 F01 Y01 HS R01 is a flame retarded PA66 with 30% glass fiber reinforcement that is used in battery pack and drive assistant sensors. The company says this latter grade offers UL94 V-0 flame resistance to 0.8 mm and maximum glow wire performance at 960°C. PBT-based compounds for the EV sector include
Tisester PBT F 30D03 F01 K02 HS R01, a 30% glass fibre reinforced, flame retardant and heat stabilised compound that is being used in thermal manage- ment systems and electric motor parts where low water absorption and good electrical insulation performance is required.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.sabic.com �
www.basf.com �
www.polyplastics.com �
www.borealisgroup.com �
www.ascendmaterials.com �
www.wittenburggroup.com �
www.imerys-graphite-and-carbon.com �
www.lanxess.com �
www.tisan.com.tr
www.compoundingworld.com
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