Lubricant Composition for Electric Vehicle Cooling
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Solution Overview
Problem
Existing lubricating oil compositions for electric vehicles face challenges in balancing low viscosity and high flash point, which are essential for effective cooling and lubrication, as they often exhibit a trade-off relationship, affecting the cooling performance and compatibility of the components.
Innovation Solution
A lubricating oil composition comprising a mineral oil base and a fluorine compound, with a kinematic viscosity of 1 to 25 mm2/s and a fluorine compound content of 3% to 30% by weight, which enhances cooling performance while maintaining compatibility and preventing separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If low viscosity lubricating oil is used to improve cooling performance, then heat transfer efficiency is improved, but flash point decreases creating safety concerns
Solution Approach 1:
The patent changes the chemical composition parameters by introducing fluorine compounds with specific molecular structures and concentrations (5-30 wt%), which fundamentally alters the physical properties of the lubricating oil to achieve both low viscosity and high flash point simultaneously
Solution Approach 2:
The patent creates a composite lubricating oil system by combining base oil with fluorine compounds and other additives in specific proportions, where the fluorine compound serves as a key component that modifies the overall properties of the lubricating oil composition
2Temperature
If fluorine compound content is increased to improve cooling performance, then heat transfer efficiency is improved, but compatibility with base oil deteriorates causing separation
Solution Approach 1:
The patent optimizes the concentration parameter of the fluorine compound within the range of 5-30 wt%, and adjusts the molecular structure parameters of the fluorine compound to ensure adequate compatibility with the base oil while maintaining cooling performance
Solution Approach 2:
The patent introduces intermediary substances such as ester compounds and other additives that act as mediators between the fluorine compound and the base oil, improving mutual compatibility and preventing phase separation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves excellent cooling performance with high density and low viscosity, along with a high flash point, ensuring efficient heat transfer and lubrication without precipitation issues, making it suitable for electric vehicles and hybrid vehicles.
Implementation Method 1
the kinematic viscosity of the base oil at 40° C. is 1 to 25 mm2/s
Implementation Method 2
excellent in terms of cooling performance... efficient heat transfer
Implementation Method 3
cooling of the apparatuses for electric vehicles
Data Source
AI summary
A lubricating oil composition which contains a base oil and a fluorine compound and may have improved cooling performance. The base oil may contain a mineral oil. The base oil may have a kinematic viscosity in a range of from 1 to 25 mm2/s at 40° C. The content of the fluorine compound may be in a range of from 3 to 30% by weight based on the total amount of the composition.