Electrical compatibility of transmission fluids in electric vehicles. (July 2022)

• Record Type: Journal Article
• Authors: Rodríguez, E.; Rivera, N.; Fernández-González, A.; Pérez, T.; González, R.; Battez, A. Hernández
• Is Part Of: Tribology international. Volume 171(2022)
• Publication Date: 2022-07
• Subjects: Electrical conductivity -- Transmission fluids -- Electric vehicles -- Oxidation; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.107544
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: The in electrical vehicles, where the electric motor is inside the transmissielectrical compatibility of the automatic transmission fluids (ATFs) is very important on and in contact with the ATF. This work studies the influence of factors like temperature, time, and air exposition on the oxidation of three ATFs and their changes in electrical conductivity. The results showed that the higher content of additive the lower variations of electrical conductivity with the oxidation; the measurements of electrical conductivity are better than FT-IR ones for monitoring oil thermo-oxidative degradation at initial periods; the conventional ATFs could maintain good electrical compatibility in electrified drivelines, although their materials compatibility and copper corrosion protection of electrical components should be also tested. Highlights: Electrical conductivity is a good parameter for monitoring the oxidation of ATFs. Changes in EC of ATFs are more related to oxidation than to viscosity changes. The impact of temperature, air flow and time on the ATFs oxidation depend on each oil. ATFs seems to have electrical compatibility to be used in electrified drivelines.