Patent SG-11201901524Y-A (SG)
Title: Method for preventing or minimizing electrostatic discharge and dielectric breakdown in electric vehicle powertrains
Inventor: Flores-Torres Samuel
IPC: C10N40/16
Filed: 2017-10-06
Abstract: ON O O O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 12 April 2018 (12.04.2018) o I iolo ollio1 100111 REMOVOIMIE (10) International Publication Number WO 2018/067905 Al WIPO I PCT (51) International Patent Classification: C/0M 169/04 (2006.01) ClON 40/14 (2006.01) ClON 30/02 (2006.01) ClON 40/16 (2006.01) (21) International Application Number: PCT/US2017/055494 (22) International Filing Date: 06 October 2017 (06.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/405,289 07 October 2016 (07.10.2016) US 15/725,764 05 October 2017 (05.10.2017) US (71) Applicant: EXXONMOBIL RESEARCH AND EN- GINEERING COMPANY [US/US]; 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (72) Inventors: FLORES-TORRES, Samuel; 37 Steeplechase Blvd., Burlington, NJ 08016 (US). HOLT, David, G., L.; 18 Saddler Drive, Medford, NJ 08055 (US). CAREY, James, T.; 1 Vernetta Lane, Medford, NJ 08055 (US). (74) Agent: MIGLIORINI, Robert, A. et al.; ExxonMobil Re- search and Engineering Company, 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(ii)) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — with international search report (Art. 21(3)) (54) Title: METHOD FOR PREVENTING OR MINIMIZING ELECTROSTATIC DISCHARGE AND DIELECTRIC BREAK- DOWN IN ELECTRIC VEHICLE POWERTRAINS (57) : This disclosure relates to a method for preventing or minimizing electrostatic discharge and dielectric breakdown in an electric vehicle powertrain by controlling electrical conductivity over a lifetime of a lubricating oil in an electric vehicle powertrain lubricated with the lubricating oil. The lubricating oil has a composition including a lubricating oil base stock as a major component, and an additive package as a minor component comprising one or more lubricating oil additives, and an effective amount of one or more conductivity agents, as a minor component. The lubricating oil has an electrical conductivity from 10 pS/m to 20,000 pS/m, a dielectric constant of 1.6 to 3.6, with a ratio of electrical conductivity-to-dielectric constant from 1,000 to 10,000. Also provided are methods for obtaining a desired electrical conductivity -to-dielectric constant ratio of a lubricating oil for an electric powertrain and powertrain components and methods for lubricating an electric vehicle powertrain and powertrain components.