EPP Foam UAV Battery Enclosure for Sub-Zero Heat Retention
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Solution Overview
Problem
Existing UAV battery performance is compromised in sub-zero ambient temperatures due to inadequate insulation and pre-flight heating methods that drain the UAV's power source, complicating flight control and reducing endurance.
Innovation Solution
An EPP foam enclosure with integrated heating coils, powered externally, pre-heats to a predefined temperature before flight, maintaining battery warmth during flight without additional power consumption, and providing impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a typical insulating enclosure with heating circuits is used to maintain battery temperature in sub-zero temperatures, then the battery temperature can be maintained, but the device complexity increases and the UAV endurance is reduced due to continuous power consumption
Solution Approach 1:
The battery is pre-heated to desired temperature before the UAV flight begins. This preliminary heating action eliminates the need for continuous heating circuits during flight, as the battery maintains its temperature through the insulating enclosure alone once pre-heated.
Solution Approach 2:
The heating function is extracted from the flight-time operation and moved to a pre-flight preparation phase. This separation removes the complexity of flight control integration and eliminates continuous power consumption during the actual flight mission.
2Temperature
If heating circuits are used during flight to maintain battery temperature, then the battery performance is maintained, but the UAV endurance is reduced due to power consumption from the main power source
Solution Approach 1:
The battery is pre-heated to the required operating temperature before flight begins. This preliminary thermal preparation ensures the battery maintains optimal performance throughout the flight without requiring additional power consumption for heating during the mission.
Solution Approach 2:
The insulating enclosure passively maintains battery temperature after pre-heating, without requiring active heating elements during flight. The system uses the battery's own heat and the insulation's thermal retention properties to maintain temperature autonomously.
3Temperature
If a typical insulating enclosure is used for the battery, then some thermal protection is provided, but the enclosure is not sufficient to retain heat for the entire flight duration in sub-zero temperatures
Solution Approach 1:
The insulating enclosure is designed with enhanced insulation parameters and thermal mass characteristics to extend heat retention duration. The enclosure's thermal properties are optimized to maintain battery temperature for the entire flight duration without active heating.
Solution Approach 2:
The insulating enclosure likely uses composite material structures combining different insulation layers and thermal management materials to achieve extended heat retention capability throughout the flight period in sub-zero 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
The EPP foam enclosure effectively retains heat for the battery pack, ensuring consistent performance and impact protection, while eliminating the need for separate shock absorption and reducing power drain.
Implementation Method 1
The insulating enclosure is made of a material including at least an expanded polypropylene (EPP) foam. The insulating enclosure is adapted for retaining heat of the insulating enclosure for heating the battery pack
Implementation Method 2
one or more heating coils configured between the battery pack and the insulating enclosure. The one or more heating coils is electrically powered from a power source for heating the insulating enclosure to a predefined temperature
Data Source
AI summary
A thermal management device 100 for a battery pack 104 of an UAV comprises an insulating enclosure 102 that is made of a material comprising at least an EPP foam for enclosing the battery pack 104, and one or more heating coils 110. The heating coils 110 are electrically powered from an external power source 112 for pre-heating the insulating enclosure 102 to a predefined temperature before flight of the UAV. The EPP foam of the insulating enclosure 102 provides high thermal insulation for retaining the heat of the insulating enclosure 102 for heating the battery pack 104 and maintaining the temperature of the battery pack 104 above a threshold temperature when the UAV flies in a sub-zero ambient temperature. A case of the enclosure incorporates structural carbon tubes that engage with holes in a cap of the enclosure to strengthen the insulating enclosure.