eVTOL Battery Cooling Control via Latent Heat Phase Monitoring
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Solution Overview
Problem
Existing battery packs in electric flying objects face challenges in ensuring consistent cooling performance of batteries during high output demands, particularly during takeoff, landing, and flight, due to variations in environmental conditions and pilot control.
Innovation Solution
A monitoring device is implemented to acquire information about the battery pack, estimate the phase state of the latent heat storage material, and control the output of the battery based on the phase state, ensuring appropriate cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery pack with latent heat storage material is used to maintain cooling performance during high output demands, then temperature control reliability is improved, but device complexity increases due to phase state monitoring and estimation requirements
Solution Approach 1:
The patent monitors changes in temperature parameters of the battery and latent heat storage material to estimate phase state transitions. By tracking temperature variations and using them to infer phase changes, the system maintains reliable cooling performance without requiring direct phase state sensors, thus managing device complexity while improving temperature control reliability.
Solution Approach 2:
The patent replaces direct mechanical or physical phase state detection with a computational estimation approach. Instead of using complex sensors to directly measure phase state, the system uses temperature data and estimation algorithms to determine phase state, substituting a simpler measurement system with a computational model that achieves the same monitoring objective.
2Measurement precision
If phase state estimation is performed continuously to ensure optimal cooling, then temperature control precision is improved, but energy consumption increases
Solution Approach 1:
The patent performs phase state estimation at periodic intervals based on temperature changes and operational conditions rather than continuously. This periodic monitoring approach maintains sufficient measurement precision for cooling control while significantly reducing energy consumption compared to continuous estimation, as the system only performs calculations when temperature thresholds or operational parameters indicate potential phase transitions.
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 enhances flight safety by ensuring that the battery pack maintains optimal cooling performance, reducing the risk of abnormal temperature rises and improving overall system reliability.
Implementation Method 1
a latent heat storage material that is capable of changing a phase state between a solid and a liquid
Implementation Method 2
a latent heat storage material that is capable of changing a phase state between a solid and a liquid
Data Source
AI summary
A monitoring device monitors a state of a battery pack mounted on an eVTOL. The monitoring device includes: an acquisition unit configured to acquire information regarding the battery pack; an estimation unit configured to estimate a phase state of a latent heat storage material based on the acquired information; and an output unit configured to output information regarding the phase state. By using the monitoring device, a performance of the latent heat storage material required for cooling a battery can be obtained. Thus, flight safety can be effectively improved.