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US 11,767,489 B2Granted
Fluids for electric vehicles
AssigneeExxon Mobil Technology and Engineering Company
InventorsAbigail R. Van Wassen, Andrew E. Taggi, Percy R. Kanga
Life of this patent
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Abstract
A fluid includes a base stock and one or more additives. The base stock has a viscosity index of at least 80, and either a kinematic viscosity at 40° C. of at least 320 cSt or a kinematic viscosity at 100° C. of at least 14 cSt. The base stock includes greater than or equal to about 90 wt % saturates, less than or equal to about 10 wt % aromatics, and a sum of terminal/pendant propyl groups and terminal/pendant ethyl groups of at least 1.7 per 100 carbon atoms. The fluid has a thermal conductivity measured according to ASTM D7896 at 140° C. of 0.12 W/m·K or greater.
Claims30
A fluid comprising:
- a base stock and one or more additives, wherein:
- the base stock has a viscosity index of at least 80, and either
- a kinematic viscosity at 40° C. of at least 320 cSt, or
- a kinematic viscosity at 100° C. of at least 14 cSt;
- the base stock comprises:
- hydrocarbons having greater than or equal to about 90 wt % saturates, and less than or equal to about 10 wt % aromatics,
- wherein the hydrocarbons comprise hydrocarbon chains having propyl groups and ethyl groups, wherein the propyl groups and ethyl groups are terminal and/or pendant to the hydrocarbon chains, wherein a sum of the propyl groups and the ethyl groups is at least 1.7 per 100 carbon atoms of the hydrocarbons, and wherein the hydrocarbons are derived from low severity deasphalting of resid fractions to form a deasphalted oil wherein the deasphalted oil is further demetallated, hydrotreated, hydrocracked, hydrodewaxed, and hydrofinished to produce the base stock;
- and
- the fluid has a thermal conductivity measured according to ASTM D7896 at 140° C. of 0.12 W/m·K or greater.
6 more elements
A method comprising:
- cooling a surface within an electrical machine by causing a fluid to contact the surface, wherein:
- the fluid comprises a base stock and one or more additives;
- the base stock has a viscosity index of at least 80, and either
- a kinematic viscosity at 40° C. of at least 320 cSt, or
- a kinematic viscosity at 100° C. of at least 14 cSt;
- the base stock comprises:
- hydrocarbons having greater than or equal to about 90 wt. % saturates, and less than or equal to about 10 wt. % aromatics, and
- wherein the hydrocarbons comprise hydrocarbon chains having propyl groups and ethyl groups, wherein the propyl groups and ethyl groups are terminal and/or pendant to the hydrocarbon chains, wherein a sum of the propyl groups and the ethyl groups is at least 1.7 per 100 carbon atoms of the hydrocarbons, and wherein the hydrocarbons are derived from low severity deasphalting of resid fractions to form a deasphalted oil wherein the deasphalted oil is further demetallated, hydrotreated, hydrocracked, hydrodewaxed, and hydrofinished to produce the base stock;
- and
- the fluid has a thermal conductivity measured according to ASTM D7896 at 140° C. of 0.12 W/m·K or greater.
7 more elements
A method for producing a deposit resistant fluid comprising:
- combining a base stock and one or more additives to form a blended fluid configured to resist forming deposits in an oxidizing environment;
- wherein:
- the base stock has a viscosity index of at least 80, and either
- a kinematic viscosity at 40° C. of at least 320 cSt, or
- a kinematic viscosity at 100° C. of at least 14 cSt;
- the base stock comprises:
- hydrocarbons having greater than or equal to about 90 wt. % saturates, and less than or equal to about 10 wt. % aromatics, and
- wherein the hydrocarbons comprise hydrocarbon chains having propyl groups and ethyl groups, wherein the propyl groups and ethyl groups are terminal and/or pendant to the hydrocarbon chains, wherein a sum of the propyl groups and the ethyl groups is at least 1.7 per 100 carbon atoms of the hydrocarbons, and wherein the hydrocarbons are derived from low severity deasphalting of resid fractions to form a deasphalted oil wherein the deasphalted oil is further demetallated, hydrotreated, hydrocracked, hydrodewaxed, and hydrofinished to produce the base stock;
- and
- the blended fluid has a thermal conductivity measured according to ASTM D7896 at 140° C. of 0.12 W/m·K or greater.
7 more elements
Dependencies are inferred from the claim text.