EV Coolant Composition for Fluoride Removal and Low Conductivity
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Solution Overview
Problem
Conventional coolant compositions for electric vehicles fail to adequately remove fluoride ions, leading to metal corrosion and high electrical conductivity, which compromises the anticorrosion and electrical resistance properties required for effective cooling of battery systems.
Innovation Solution
Incorporating calcium carbonate, calcium nitrate, or a mixture thereof as a fluorine remover in the coolant composition maintains a neutral pH and low electric conductivity while effectively removing fluoride ions, with specific concentration ranges to optimize anticorrosion and conductivity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coolant is used, then cooling function is provided, but fluoride ions remain causing metal corrosion and high electric conductivity
Solution Approach 1:
The patent applies fluorine remover (calcium compound) to extract and remove fluoride ions from the coolant through chemical reaction, forming insoluble calcium fluoride precipitates that are then filtered out, thereby reducing fluoride ion content to 80 ppm or less and improving anticorrosion properties
Solution Approach 2:
The patent changes the chemical composition parameters of the coolant by controlling fluoride ion content to 80 ppm or less, pH to 6-9, and electric conductivity to 250 μS/cm or less, transforming the coolant from a corrosive state to a protected state against metal corrosion
2Object-affected harmful factors
If rust inhibitor amount is reduced to lower electric conductivity, then conductivity decreases, but rust-inhibiting ability is reduced
Solution Approach 1:
The patent converts the harmful effect of fluoride ions into a beneficial removal process by using calcium compound to precipitate fluoride ions as calcium fluoride, simultaneously achieving low electric conductivity (250 μS/cm or less) and maintaining rust-inhibiting ability through controlled pH (6-9) without requiring excessive rust inhibitors
Solution Approach 2:
The patent introduces fluorine remover (calcium compound) as an intermediary substance that mediates between the conflicting requirements of low conductivity and high rust resistance, using calcium fluoride precipitation to remove fluoride ions while maintaining appropriate pH levels for corrosion protection
3Reliability
If pH is made alkaline to improve corrosion resistance, then anticorrosion property improves, but metal rusting occurs
Solution Approach 1:
The patent optimizes the pH parameter to a neutral range (6-9) rather than highly alkaline conditions, combined with fluoride ion removal to achieve effective corrosion protection without causing metal rusting that occurs at excessively high pH levels
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 coolant composition achieves a fluoride ion content of 80 ppm or less, a pH of 6 to 9, and an electric conductivity of 250 μS/cm or less, thereby enhancing the anticorrosion properties and maintaining optimal electrical resistance for electric vehicle components.
Implementation Method 1
adding calcium carbonate, calcium nitrate, or a mixture thereof as a fluorine remover can maintain a neutral pH and low electric conductivity while sufficiently removing fluoride ions in the coolant composition
Data Source
AI summary
The present disclosure provides a coolant composition for an electric vehicle in which fluoride ions are sufficiently removed. The present disclosure relates to a coolant composition for an electric vehicle that contains a fluorine remover including calcium carbonate, calcium nitrate, or a mixture thereof. The coolant composition has a fluoride ion content of 80 ppm or less, a pH of 6 to 9, and an electric conductivity of 250 μS/cm or less.