TotalEnergies has patented a method for enhancing lubricant compositions in electric and hybrid vehicles. The method involves using polyorganosiloxane to effectively release air from the lubricant, specifically for moving parts operating at speeds between 1000 and 15000 rpm. GlobalData’s report on TotalEnergies gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on TotalEnergies, AI assisted CAD was a key innovation area identified from patents. TotalEnergies's grant share as of July 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Air release in lubricants for electric/hybrid vehicles
The granted patent US12071597B2 outlines a method for enhancing the performance of lubricant compositions used in the propulsion systems of electric and hybrid vehicles. The method involves lubricating moving parts, specifically those rotating at speeds between 1,000 and 15,000 rpm, with a lubricant that includes at least one base oil and a polyorganosiloxane, such as polydimethylsiloxane. The lubricant composition is designed to minimize air volume variation, with specific claims stating that the initial air volume variation should be less than 6% or even 5%, as measured by the NF ISO 12152 standard. The composition is required to contain a significant proportion of base oils, with claims indicating that at least 70% by weight of the lubricant should consist of these oils.
Additionally, the patent addresses the reduction of bubbling losses within the lubrication system, which is crucial for maintaining efficiency in electric and hybrid vehicle propulsion systems. The method includes steps to release air from the lubricant and reduce bubbling losses by at least 10%. The claims specify that the lubricant composition should be mixed properly to ensure effective performance, and it may include various elements of the lubrication system, such as bearings located between the rotor and stator of an electric motor. Overall, the patent presents a comprehensive approach to improving lubricant performance, thereby potentially enhancing the operational efficiency of electric and hybrid vehicles.
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