Immersion Cooling Fluid Composition for High-Heat Battery Thermal Management
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Solution Overview
Problem
Current thermal management systems for heat-generating components, such as electric vehicle batteries and IT equipment, face challenges in efficiently managing high heat loads, leading to potential battery deterioration, increased energy consumption, and safety issues due to limitations in heat transfer efficiency and fluid compatibility.
Innovation Solution
A thermal management system utilizing a Fischer-Tropsch derived base fluid with antioxidant and antistatic additives in a constant cyclical flow, directly in contact with heat-generating components, to enhance heat transfer and maintain fluid stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional water/glycol mixture is used as heat transfer fluid, then heat transfer efficiency is improved, but fluid stability and safety deteriorate under high temperature conditions
Solution Approach 1:
The patent changes the chemical composition parameters of the heat transfer fluid by using Fischer-Tropsch derived base fluid instead of conventional water/glycol mixtures. This parameter change maintains high heat transfer efficiency while significantly improving fluid stability and safety under high temperature conditions, eliminating the trade-off between these properties.
2Productivity
If high current is used for fast charging, then charging speed is improved, but excess heat generation increases
Solution Approach 1:
The patent changes the thermal management parameters by implementing direct immersion cooling with optimized fluid circulation. This allows the system to handle the excess heat generated by high current fast charging, enabling high charging speeds without unacceptable temperature increases that would compromise battery safety.
3Loss of energy
If direct liquid cooling is implemented, then heat transfer efficiency is improved, but dielectric properties of the fluid deteriorate over time
Solution Approach 1:
The patent uses a composite heat transfer fluid formulation combining Fischer-Tropsch derived base fluid with specific additives. This composite material maintains excellent dielectric properties over time while providing efficient direct liquid cooling, resolving the contradiction between heat transfer efficiency and dielectric property retention.
4Device complexity
If air cooling system is used, then system complexity is reduced, but heat management capability deteriorates under high heat loads
Solution Approach 1:
The patent transitions from air cooling (pneumatic) to liquid immersion cooling (hydraulic). This change enables effective heat management under high heat loads while the system design keeps the implementation relatively simple, using a tank-based immersion system with circulation pumps rather than complex forced convection air cooling infrastructure.
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 system effectively manages high heat loads, improves fluid stability and safety, and maintains optimal conductivity and dielectric properties over time, preventing short circuits and enhancing the durability and charging capabilities of heat-generating components.
Implementation Method 1
a working fluid liquid disposed within the interior space such that the heat-generating component is in contact with the working fluid
Implementation Method 2
a constant cyclical flow of working fluid is maintained across the one or more heat-generating components, on to the heat exchanger and then back to the heat-generating component
Implementation Method 3
a heat exchanger; and a working fluid liquid disposed within the interior space such that the heat-generating component is in contact with the working fluid
Implementation Method 4
the working fluid comprises a Fischer-Tropsch derived base fluid; an antioxidant additive and an anti-static additive
Implementation Method 5
the working fluid comprises a Fischer-Tropsch derived base fluid; an antioxidant additive and an anti-static additive
Data Source
AI summary
The present invention provides a thermal management system comprising a housing having an interior space; a heat-generating component disposed within the interior space; a heat exchanger; and a working fluid liquid disposed within the interior space wherein the heat-generating component is in contact with the working fluid. The working fluid comprises a Fischer-Tropsch derived base fluid; an antioxidant and anti-static additives. The system is constructed wherein a constant cyclical flow of working fluid is maintained across the heat-generating components, on to the heat exchanger and then back to the heat-generating component.The present invention provides a method of thermal management of a heat-generating component comprising partially immersing a heat-generating component in a working fluid and transferring the heat from the heat-generating component using the working fluid in a constant cyclical flow of working fluid across the heat-generating components, on to a heat exchanger and then back to the heat-generating component.