Detachable Fuselage Battery Mount for Frontal Collision Load Release
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Solution Overview
Problem
Conventional urban air mobility vehicles face safety issues due to battery explosions or fires resulting from collisions, as lithium-type batteries used in these vehicles can experience thermal runaway upon impact, releasing flammable electrolytes and gases.
Innovation Solution
A detachable battery structure for the fuselage that includes a floor connector, battery unit, battery unit extension, crash unit, and dash reinforcement assembly, designed to detach the battery from the fuselage during a frontal collision, distributing collision loads to reduce the risk of explosion or fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery is fixed to the fuselage, then the structural integrity is maintained, but the safety is compromised due to battery explosion or fire risk during collision
Solution Approach 1:
The battery mounting structure transitions from a static fixed state to a dynamic detachable state during collision. The battery unit extension moves relative to the floor connector, allowing the battery to detach automatically when collision force exceeds a threshold, thus resolving the contradiction between maintaining structural integrity and ensuring safety
Solution Approach 2:
The battery unit is extracted from the fixed mounting position during collision events. The floor connector and battery unit extension are designed to separate under impact forces, removing the battery from the fuselage structure to prevent fire or explosion propagation while maintaining normal fixed mounting during operation
2Reliability
If the battery is detachable during collision, then the fire stability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The battery unit extension serves multiple functions: it provides normal mounting support during operation and acts as a detachable safety mechanism during collision. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving fire stability
Solution Approach 2:
The mounting structure is segmented into the floor connector and battery unit extension, which can separate during collision. This segmentation enables the detachable function with minimal additional components, avoiding excessive complexity while improving fire stability
3Force
If the battery unit extension transmits load during collision, then the force distribution is improved, but the movement mechanism complexity increases
Solution Approach 1:
The battery unit extension employs a dynamic movement mechanism that allows controlled sliding or separation along a defined path during collision. This dynamic design enables effective load distribution through the extension while keeping the movement mechanism relatively simple through guided motion constraints
Data Source
AI summary
A detachable battery structure of a fuselage including a floor unit positioned on a fuselage, a battery unit fastened to the floor unit and configured to receive a load in the event of a frontal collision of the fuselage, a battery unit extension fastened to a window frame of the fuselage and configured to transmit the load to the battery unit in the event of the frontal collision of the fuselage, a crash unit positioned in front of the window frame, and a dash reinforcement assembly fastened to the window frame and positioned on a rear surface of the crash unit, wherein the dash reinforcement assembly moves backward in the event of the frontal collision of the fuselage so that the battery unit extension moves in a longitudinal direction, and the battery unit is configured to move backward to be detached from the floor unit.