Evolving grease formulations help smooth the transition toward electric vehicles. TLT November 2021 Electric vehicles don't require gasoline, but they do require grease. Existing greases are OK for windshield wipers, door hinges, and window winder mechanisms, but the bearings and gears in the drive train are a different story. High operating temperatures and voltages are key concerns. As current densities increase, so does the risk of stray currents that can pit bearings. Typical electric motor speeds, currently around 15,000 rpm, are expected to exceed 20,000 rpm in the near future. /
Electric vehicle fluids differ in fundamental ways from those used for internal combustion engines—and from each other. TLT October 2021 • Electric vehicle (EV) transmission fluids, which multitask as lubricants and coolants, are likely to be formulated as vehicle design elements, with fill-for-life applications in mind.• EV fluid formulations may help dissipate stray electrical currents, and they must be compatible with the copper wiring and polymer seals and insulators with which they come into contact. • Thermal management fluids for battery and power electronics systems are an active area for development.