Bodyshell Venting Channel With Labyrinth Gas Treatment
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Solution Overview
Problem
The challenge in electrically powered vehicles is to safely discharge venting gas and entrained particles from a thermal event in the energy storage system without posing a danger to occupants or the environment, as the gas is highly flammable and can ignite external fuel sources.
Innovation Solution
A bodyshell structure with a venting channel and integrated venting gas treatment device that includes a labyrinth path, filter, and pressurization system to cool and separate particles, guiding the gas to a safe outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If venting gas is discharged directly from the battery without treatment, then the discharge process is simple and quick, but the hot particles can ignite the gas and cause fire outside the energy storage unit
Solution Approach 1:
A venting gas treatment device is introduced as an intermediary component between the battery and the external environment. This device includes a labyrinth path that forces the venting gas to follow a tortuous route, thereby cooling the gas and separating particles from the gas flow before discharge, preventing ignition of the venting gas outside the energy storage unit
Solution Approach 2:
The venting channel is designed with a three-dimensional labyrinth path instead of a straight line. The gas flow is redirected through multiple levels and directions within the treatment device, increasing the path length and cooling effect while maintaining a compact external footprint
2Reliability
If a venting gas treatment device with labyrinth path is added to cool and separate particles, then the safety of venting gas discharge is improved, but the device complexity increases
Solution Approach 1:
The venting gas treatment device is merged with the existing venting channel structure formed by bodyshell components. The labyrinth path, filter, and pressurization system are integrated into the venting channel rather than being separate additions, thereby improving safety while minimizing the increase in overall device complexity
3Temperature
If the venting gas flow path is extended through a labyrinth structure, then the cooling effect and particle separation are enhanced, but the volume of the venting channel increases
Solution Approach 1:
The labyrinth path is nested within the existing venting channel volume by utilizing the three-dimensional space created by bodyshell components such as cross members and side sills. The tortuous path is formed by strategically placing inlet and outlet openings in the walls of these components, allowing the gas to flow through a long path within a compact volume
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 solution effectively reduces the temperature and separates particles, minimizing the risk of ignition and ensuring the venting gas is safe for external discharge.
Implementation Method 1
a venting gas treatment device is provided within the venting channel for the targeted treatment of the venting gas and/or the particles entrained with the venting gas
Implementation Method 2
particles entrained with the venting gas from the overheated drive battery
Data Source
AI summary
A bodyshell structure for an electrically driveable motor vehicle includes a ventilation channel formed by a plurality of structural components that are connected to one another and delimit respective cavities. The ventilation channel has at least one inlet opening for inflow of a venting gas that emerges from a drive battery of the motor vehicle in an event of a thermal event and has at least one outlet opening via which the venting gas is dischargeable into a surrounding of the motor vehicle. A venting gas treatment device is disposed inside the ventilation channel where the venting gas and/or particles entrained with the venting gas is treatable by the venting gas treatment device.