Electric Flight Battery Warm-Up Control Before Low-Temperature Takeoff
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Solution Overview
Problem
Unmanned electric flight vehicles face safety issues due to unstable battery output when the battery temperature is too low, leading to insufficient rotary wing output and potential flight hazards.
Innovation Solution
A control device for electric flight vehicles that includes a temperature acquisition unit to monitor battery temperature and a take-off restriction unit to prevent take-off when the battery temperature is below a permissible threshold, ensuring safe operation by restricting take-off until the battery temperature rises to a sufficient level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electric flight vehicle allows take-off when battery temperature is low, then take-off availability is improved, but battery output stability deteriorates
Solution Approach 1:
The control device performs preliminary temperature assessment before take-off by acquiring battery temperature in advance. When the temperature is below the threshold, the system proactively prevents take-off and initiates temperature-raising control by driving the rotary wing to rotate without generating lift, warming the battery before permitting take-off operations.
Solution Approach 2:
The system dynamically adjusts the battery temperature management strategy based on real-time temperature conditions. When temperature is low, the rotary wing is controlled to rotate in a temperature-raising mode rather than a thrust-generation mode, dynamically adapting the operating state to protect battery stability while preparing for safe take-off.
2Temperature
If the battery temperature is raised by driving the rotary wing, then battery temperature increases, but flight safety may be compromised due to unstable output
Solution Approach 1:
The control device applies different control strategies to different operational phases: during temperature-raising control, the rotary wing is driven in a mode that prioritizes battery warming over thrust generation, while during normal flight operations, full thrust capability is available. This localized quality adjustment ensures safe temperature management without compromising overall flight safety.
Solution Approach 2:
The system continuously monitors battery temperature and provides feedback to the control device. When temperature reaches the threshold, the system transitions from temperature-raising mode to normal operation mode, ensuring that temperature management actions are adjusted based on real-time conditions to maintain flight safety.
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
Enhances safety by preventing take-off when battery output is insufficient, thereby maintaining stable flight operations and reducing the risk of accidents.
Implementation Method 1
a temperature-raising control unit configured to perform temperature-raising control by driving the rotors to rotate without thrust
Data Source
AI summary
The disclosure relates to a technique for controlling an electric flight vehicle having a rotary wing driven by electric power of a battery. In the technique, a temperature of the battery is acquired as a battery temperature. Restriction is placed on take-off of the electric flight vehicle when the battery temperature is lower than a take-off permitting temperature that is a temperature for permitting take-off of the electric flight vehicle. The restriction placed on take-off of the electric flight vehicle may be terminated when the battery temperature exceeds a restriction terminating temperature and the battery temperature raising processing is performed. The restriction terminating temperature is higher than the take-off permitting temperature.