Battery Coolant Composition for Low-Conductivity Vehicle Thermal Management
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Solution Overview
Problem
Conventional vehicle thermal management systems face challenges in maintaining effective heat transfer from the battery to the heat transfer medium without risking short circuits, which reduces the heat radiating function of the radiator, necessitating larger radiator sizes or reduced flow rates.
Innovation Solution
Incorporating a heat transfer medium with a liquid base material and orthosilicic acid ester, which provides rust inhibition and low electrical conductivity, eliminating the need for ionic rust inhibitors and allowing for increased heat transfer without short circuit concerns, thereby enhancing the radiator's heat radiating capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional heat transfer media with ionic rust inhibitors are used, then rust inhibition is provided, but electrical conductivity increases causing short circuit risks that reduce heat transfer efficiency
Solution Approach 1:
The patent changes the chemical composition parameters of the heat transfer medium by using orthosilicic acid ester instead of ionic rust inhibitors, maintaining rust protection while reducing electrical conductivity to prevent short circuits and improve heat transfer efficiency
Solution Approach 2:
The patent employs a non-ionic rust inhibitor (orthosilicic acid ester) that provides effective corrosion protection without the harmful electrical conductivity issues of traditional ionic inhibitors, eliminating the need for complex safety systems
2Reliability
If flow rate is reduced to prevent short circuits, then safety is improved, but heat radiating function of the radiator is reduced
Solution Approach 1:
The patent changes the electrical conductivity parameter of the heat transfer medium by eliminating ionic rust inhibitors, enabling increased flow rates for improved heat radiating function while maintaining safety through non-ionic corrosion protection
3Productivity
If radiator size is increased to maintain heat transfer, then heat radiating capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the electrical conductivity parameter of the heat transfer medium, enabling optimized flow rates that improve heat radiating capability without requiring increased radiator size, thus maintaining system compactness and simplicity
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
This solution enables sufficient heat transfer from the battery to the radiator, allowing for efficient cooling and reducing the time required for quick charging, while maintaining high electric insulation properties and preventing hydrogen generation due to electrochemical reactions.
Implementation Method 1
a liquid heat transfer medium that transfers heat from the battery
Implementation Method 2
The heat receiver that is configured to cause the heat transfer medium to receive the heat through heat exchange with the battery
Implementation Method 3
an orthosilicic acid ester compatible with the liquid base material and does not include an ionic rust inhibitor
Implementation Method 4
The heat transfer medium includes a liquid base material including water and an orthosilicic acid ester compatible with the liquid base material and does not include an ionic rust inhibitor
Data Source
AI summary
A vehicle thermal management system mounted in a vehicle includes a vehicle driving battery, a liquid heat transfer medium, a heat receiver, and a radiator. The heat receiver causes the heat transfer medium to receive heat through heat exchange with the battery. The radiator causes the heat transfer medium to release the heat through heat exchange with an air outside of the vehicle. The heat transfer medium includes a liquid base material including water and an orthosilicic acid ester compatible with the liquid base material and does not include an ionic rust inhibitor. The orthosilicic acid ester is present, as a concentration of silicon, relative to a total mass of the heat transfer medium within a range between 2000 mass ppm, non-inclusive, and 10000 mass ppm, inclusive.