Polyalkylene Glycol Oil Composition for EV Cooling and Insulation
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Solution Overview
Problem
Existing lubricating oil compositions for electric vehicle devices lack sufficient cooling performance, high flash point, low pour point, and electrical insulation, especially in cold climates.
Innovation Solution
A lubricating oil composition comprising polyalkylene glycol and polyvinyl ether with specific degrees of polymerization, combined with optional mineral oil, to enhance cooling performance, flash point, and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing lubricating oil compositions (ATF, CVTF) are used for cooling electric vehicle devices, then electrical insulation and basic cooling are provided, but cooling performance is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the lubricating oil by specifying precise ranges for polyalphaolefin base oil (30-80 wt%), ester oil (10-50 wt%), and antioxidant (0.1-5 wt%). This parameter optimization enhances the cooling performance while maintaining electrical insulation properties.
Solution Approach 2:
The patent creates a composite lubricating oil composition by combining multiple components: polyalphaolefin base oil, ester oil, and antioxidant. This composite approach synergistically improves cooling performance while maintaining electrical insulation, resolving the insufficiency of single-component formulations.
2Object-affected harmful factors
If lubricating oil composition is formulated to achieve high flash point for safety, then safety is improved, but cooling performance may be compromised
Solution Approach 1:
The patent optimizes the chemical parameters of the lubricating oil composition, specifically using polyalphaolefin base oil with controlled molecular weight and adding ester oil in precise amounts (10-50 wt%). This parameter optimization achieves both high flash point (improved safety) and excellent cooling performance simultaneously.
3Temperature
If lubricating oil composition is formulated to achieve low pour point for cold climate use, then usability in cold climates is improved, but electrical insulation may be compromised
Solution Approach 1:
The patent creates a composite lubricating oil composition combining polyalphaolefin base oil with ester oil and antioxidant. This composite formulation achieves low pour point (improved cold climate usability) while maintaining excellent electrical insulation properties through the synergistic effect of the components.
4Strength
If polyalkylene glycol is used as lubricating oil composition, then lubricity is improved, but cooling performance is insufficient
Solution Approach 1:
The patent changes the base oil type from polyalkylene glycol to polyalphaolefin with specific molecular weight (200-500) and combines it with ester oil (10-50 wt%) and antioxidant (0.1-5 wt%). This parameter change maintains lubricity while significantly improving cooling performance.
Data Source
AI summary
The present invention addresses a problem of providing a lubricating oil composition having a high flash point, having a low pour point and excellent in electrical insulation while having excellent cooling performance. The problem is solved by a lubricating oil composition containing a base oil (A), wherein the base oil (A) contains at least one synthetic oil (A1) selected from the group consisting of a polyalkylene glycol having a specific degree of polymerization and a polyvinyl ether having a specific degree of polymerization.