Battery Rack Venting Structure for Ignition Risk Isolation
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Solution Overview
Problem
Conventional battery racks pose a high risk of flaring or ignition due to vent gas being vented to the atmosphere and mixing with outdoor air, leading to unintentional fires during abnormal situations like overheating.
Innovation Solution
A battery rack design featuring venting holes in each battery module, supported by brackets with guide channels and a barrier membrane that opens at a predetermined temperature to reroute vent gas away from ignition risk zones, preventing mixing with outdoor air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If venting holes are provided in battery modules to release vent gas during abnormal situations, then the risk of internal pressure buildup is reduced, but the risk of flaring or ignition increases when vent gas mixes with outdoor air
Solution Approach 1:
The support bracket acts as an intermediary component between the battery module and the external environment. It provides a controlled pathway (guide channel) for vent gas to escape, mediating between the need to release pressure and the need to prevent ignition. The bracket redirects vent gas away from ignition sources while maintaining a controlled release path.
Solution Approach 2:
The harmful vent gas is extracted from its original escape path (directly to atmosphere near ignition sources) and redirected through a controlled pathway. The support bracket's guide channel separates the vent gas flow from the surrounding air and ignition risk zones, taking the gas out of the dangerous environment temporarily before safe discharge.
2Temperature
If vent gas is vented directly to the atmosphere, then the cooling effect is maintained, but the mixing with outdoor air creates ignition risk zones
Solution Approach 1:
The support bracket serves as an intermediary structure that allows cooling airflow while preventing dangerous mixing. The guide channel provides a controlled interface between the battery module's internal environment and the external atmosphere, enabling thermal management while isolating vent gas from ignition sources.
Solution Approach 2:
The support bracket introduces a spatial dimension to the venting process by creating a three-dimensional pathway (guide channel) that redirects vent gas away from the horizontal plane where ignition sources exist. This dimensional redirection separates the hot vent gas flow from the ignition risk zone while maintaining cooling effectiveness.
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
Effectively prevents flaring or ignition by guiding vent gas to a safe location, reducing the risk of thermal runaway and minimizing damage, while maintaining cooling performance and preventing moisture or impurities in normal conditions.
Implementation Method 1
The barrier membrane may melt or tear at the predetermined temperature or above to make the at least one guide hole and the at least one venting hole communicate with each other.
Data Source
AI summary
A battery rack includes a plurality of battery modules, each including at least one battery cell, wherein each battery module has at least one venting hole; a rack case accommodating the plurality of battery modules; and a plurality of support brackets disposed in the rack case such that each support bracket supports each battery module and is in communication with the at least one venting hole.