eVTOL Battery Charging Control for Post-Landing Transients
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Solution Overview
Problem
Existing electric flight vehicles face challenges in achieving high utilization rates due to battery deterioration and malfunctions during rapid charging after landing, which can be exacerbated by transient changes in battery state and temperature.
Innovation Solution
A controller that acquires a battery profile during landing flight and sets a charging plan before the battery stabilizes, allowing for rapid charging without causing deterioration or malfunction by predicting and mitigating potential abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid charging is performed after landing to increase operating rate, then productivity is improved, but battery deterioration and malfunction occur due to transient battery state changes
Solution Approach 1:
The system performs preliminary analysis of the battery profile (load profile and state profile) during landing flight to predict the battery's transient response after landing. Based on this preliminary action, the charging control unit determines the appropriate charging start timing, allowing rapid charging to begin as soon as it is safe to do so, thus maximizing productivity while preventing battery deterioration.
Solution Approach 2:
The system continuously monitors the battery's load profile and state profile during landing flight, and uses this feedback information to dynamically adjust the charging start timing. The charging control unit compares the actual battery behavior against expected transient patterns and makes real-time decisions about when to initiate charging, ensuring optimal balance between rapid charging and battery protection.
2Reliability
If charging is delayed to allow battery stabilization, then battery reliability is improved, but operating rate decreases due to lost time
Solution Approach 1:
The system performs preliminary analysis of the battery profile (load profile and state profile) during landing flight to predict the battery's transient response after landing. Based on this preliminary action, the charging control unit determines the appropriate charging start timing, allowing rapid charging to begin as soon as it is safe to do so, thus maximizing productivity while preventing battery deterioration.
Solution Approach 2:
The system dynamically adjusts the charging start timing based on the actual battery behavior during and after landing. Instead of using a fixed delay period, the charging control unit continuously evaluates the battery's transient response and adapts the charging initiation time to match the specific conditions of each landing, optimizing both reliability and productivity for each individual case.
3Speed
If high charging power is applied immediately after landing, then charging speed is improved, but temperature rise and abnormalities occur
Solution Approach 1:
The system performs preliminary analysis of the battery profile (load profile and state profile) during landing flight to predict the battery's transient response after landing. Based on this preliminary action, the charging control unit determines the appropriate charging start timing, allowing rapid charging to begin as soon as it is safe to do so, thus maximizing productivity while preventing battery deterioration.
Solution Approach 2:
The system takes preliminary anti-action by analyzing the battery's transient response characteristics during landing flight and using this information to prevent excessive temperature rise. The charging control unit determines the optimal charging start timing that anticipates potential temperature issues, thereby preventing abnormalities before they occur rather than reacting to them after they manifest.
Data Source
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AI summary
A controller (40) controls charging of a battery (14) mounted on an eVTOL (10). The controller includes an acquisition unit (41) and a setting unit (42). The acquisition unit acquires a battery load profile and/or a battery state profile as a profile during landing flight. The setting unit sets a charging plan for when the eVTOL is parked based on the profile before completion of battery transient change after landing.