High Voltage Battery Cooling Control via Dynamic Air Source Switching
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Solution Overview
Problem
Conventional high voltage battery cooling methods in vehicles are inefficient in preventing overheating, especially when the vehicle is idle in direct sunlight, as indoor air temperature fluctuations can lead to excessive battery temperatures, potentially rendering the vehicle unusable.
Innovation Solution
A high voltage battery cooling control technique that analyzes the interior air temperature, vehicle velocity, and battery temperature to determine if a predetermined switching condition is met, and switches the cooling mode to an indoor air mode to prevent overheating by stopping the circulation of hot interior air to the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air cooling method is used for high voltage battery, then cooling function is provided, but cooling efficiency deteriorates when indoor air temperature is high
Solution Approach 1:
The patent implements dynamic switching between outdoor air cooling mode and indoor air cooling mode based on real-time temperature conditions. The system monitors indoor air temperature, outdoor air temperature, and battery temperature to dynamically determine the optimal cooling source, thereby maintaining reliable cooling performance regardless of ambient conditions.
Solution Approach 2:
The system changes the temperature parameter of the cooling air by selecting different air sources (indoor or outdoor) based on environmental conditions. When indoor air temperature exceeds a predetermined threshold, the system switches to using outdoor air for cooling, thus changing the thermal parameter of the cooling medium to maintain effective heat dissipation.
2Productivity
If outdoor air is used for cooling, then cooling efficiency is improved, but battery may overheat when outdoor temperature is high
Solution Approach 1:
The system employs feedback control by continuously monitoring outdoor air temperature, indoor air temperature, and battery temperature. Based on this feedback, the control unit determines whether to switch between outdoor air cooling mode and indoor air cooling mode, ensuring that cooling is always applied effectively without causing battery overheating.
Solution Approach 2:
The control unit acts as an intermediary that mediates between the outdoor air source and the battery cooling system. It evaluates environmental conditions and intermediates the selection of appropriate cooling air source, preventing direct use of hot outdoor air when conditions are unfavorable, thus avoiding battery overheating.
3Device complexity
If conventional cooling control is used, then system simplicity is maintained, but battery temperature control precision deteriorates
Solution Approach 1:
The system performs preliminary assessment of cooling conditions by monitoring indoor and outdoor air temperatures before initiating battery cooling. Based on this preliminary evaluation, the control unit pre-determines the appropriate cooling mode (indoor air cooling or outdoor air cooling), enabling precise temperature control from the outset rather than reacting to overheating conditions.
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 technique significantly reduces the likelihood of high voltage battery overheating, enhancing operational stability and safety by maintaining a stable cooling mode even when the vehicle is idle in high temperatures.
Implementation Method 1
air in a vehicle is drawn in and flows over the high voltage battery, thereby cooling the battery using the air
Data Source
AI summary
The present invention relates to a high voltage battery cooling control technique that improves the operational stability of a high voltage battery by decreasing the likelihood that the battery will overheat due to the indoor air temperature of the vehicle.