Closed-Loop Battery Cooling With Inert Gas Circulation
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Solution Overview
Problem
Existing battery cooling systems using outer air for cooling introduce moisture, leading to electrical shorts and fail to maintain constant temperatures, while also risking harmful gas leaks during emergencies.
Innovation Solution
A closed-loop cooling device with a sealed housing, blower fan, loop duct, heat exchanger, and non-flammable gas circulation to prevent outer air entry and control temperature, using a heat exchanger to cool the battery module and prevent gas leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If outer air is used for cooling the battery pack, then cooling effect is achieved, but moisture is introduced causing electrical shorts
Solution Approach 1:
The patent replaces outer air with an inert gas (nitrogen) atmosphere inside the battery case. The gas circulation system circulates this inert gas to cool the battery pack while preventing moisture from entering, thus eliminating the risk of electrical shorts while maintaining effective cooling.
2Temperature
If outer air is used for cooling, then cooling is provided, but temperature cannot be kept constant
Solution Approach 1:
The patent employs a temperature sensor to monitor the battery pack temperature and a control unit that adjusts the gas circulation based on temperature feedback. When the temperature exceeds a predetermined threshold, the control unit activates the gas circulation system to cool the battery, thereby maintaining stable temperature control.
3Temperature
If outer air cooling is used, then cooling efficiency is improved, but harmful gas may leak to outside during emergency
Solution Approach 1:
The patent fills the battery case with an inert gas (nitrogen) atmosphere that prevents combustion and harmful reactions. Even in emergency situations where battery cells may fail, the inert atmosphere prevents harmful gas generation and leakage, eliminating fire and explosion risks while maintaining cooling functionality.
4Reliability
If sealed housing is used to prevent moisture entry, then electrical short prevention is improved, but cooling efficiency may decrease
Solution Approach 1:
The patent uses a pressurized gas circulation system to actively cool the battery pack through forced convection. The blower forces inert gas to circulate through the battery module, providing efficient heat removal while maintaining the sealed environment that prevents moisture ingress and electrical shorts.
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
Prevents electrical shorts by excluding moisture, maintains stable temperatures, and prevents harmful gas leaks by using a sealed system with non-flammable gas circulation and a heat exchanger.
Implementation Method 1
a heat exchanger connected to the loop duct to cool heated gas
Implementation Method 2
a blower fan including an exhaust port through which gas present inside the battery module is discharged and sucking and discharging the gas
Data Source
AI summary
Provided is a closed-loop cooling device for batteries, including: a housing including components of the cooling device for batteries disposed therein and sealed to prevent outer air from being introduced thereinto; a battery module disposed inside the housing; an inlet duct including an intake port through which cooled gas is introduced into the battery module; a blower fan including an exhaust port through which gas present inside the battery module is discharged and sucking and discharging the gas; a loop duct having one side connected to the exhaust port and the other side connected to the intake port to deliver the gas; a heat exchanger connected to the loop duct to cool heated gas; and a pipe through which a cooling fluid to cool the heat exchanger moves.