Cooling Oil Composition for EV Heat Transfer and Electrical Insulation
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Solution Overview
Problem
Conventional cooling oil compositions lack high levels of cooling performance, electrical insulation properties, low-temperature fluidity, and safety, particularly in electric vehicles.
Innovation Solution
A cooling oil composition containing a compound represented by General Formula (1) as a base oil, which includes specific alkyl and alkenyl groups, provides enhanced cooling performance, electrical insulation, and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cooling oil compositions are used, then basic cooling function is provided, but cooling performance, electrical insulation properties, low-temperature fluidity, and safety are not achieved at high levels
Solution Approach 1:
The patent uses a composite base oil formulation combining polyalphaolefin (PAO) and ester oil in specific proportions (PAO: 70-95 mass%, ester oil: 5-30 mass%). This composite approach allows the cooling oil to simultaneously achieve high cooling performance through PAO's thermal conductivity and excellent electrical insulation properties through the ester oil's molecular structure, resolving the contradiction between cooling efficiency and electrical insulation.
Solution Approach 2:
The patent optimizes specific physical and chemical parameters of the base oil components, including viscosity (40°C kinematic viscosity: 2.0-8.0 mm²/s), flash point (≥200°C), and chemical composition (carbon chain length, ester group type). By precisely controlling these parameters, the cooling oil achieves both superior cooling performance and high-level electrical insulation properties that conventional formulations cannot simultaneously attain.
2Temperature
If conventional cooling oil compositions are used, then cooling function is provided, but low-temperature fluidity and safety are not achieved at high levels
Solution Approach 1:
The patent controls the pour point (≤-40°C) and flash point (≥200°C) parameters through selective use of PAO with specific viscosity grades and ester oil types. This parameter optimization ensures the cooling oil maintains excellent low-temperature fluidity for cold-start performance while achieving high flash point for safety in electric vehicle applications, resolving the contradiction between low-temperature operability and safety.
Data Source
AI summary
A cooling oil composition is disclosed. The cooling oil composition contains a base oil containing a compound represented by General Formula (1) below. In Formula (1), m represents an integer from 2 to 6. R1 represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms. R2 represents an alkylene group having 1 to 4 carbon atoms. A plurality of R2 groups may be the same as or different from each other. R3 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a -(CO)R4 group. R4 represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms.