Battery Box Vent Duct Structure for Safe Multi-Layer Stacking
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Solution Overview
Problem
Current battery box structures limit installation density due to the risk of fire spreading when flammable gases and flames are discharged, preventing multi-layer stacking without adjacent enclosure ignition.
Innovation Solution
A battery box structure with a duct system and check valves that discharge flammable gases and flames externally while preventing their spread to adjacent enclosures, incorporating fire detection sensors and communication devices for controlled valve operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flammable gases and flames are discharged from the battery box, then fire safety is improved, but multi-layer stacking is prevented due to risk of ignition of adjacent enclosures
Solution Approach 1:
The harmful flammable gases and flames are extracted from the immediate enclosure space and directed through a duct system to an exhaust port located away from the battery box. This separation allows safe discharge of combustion products without exposing adjacent stacked enclosures to ignition risk, thereby enabling multi-layer stacking while maintaining fire safety.
Solution Approach 2:
A duct structure acts as an intermediary channel between the deflagration panel (where flammable gases are generated) and the exhaust port (where gases are safely discharged). This intermediary pathway directs the flammable gases away from adjacent enclosures, mediating between the need for gas discharge and the requirement to prevent ignition of neighboring units, thus enabling safe multi-layer stacking.
2Object-affected harmful factors
If a duct structure is added to discharge flammable gases externally, then fire spread risk is reduced, but device complexity increases
Solution Approach 1:
The fire safety system is segmented into distinct functional components: a deflagration panel for gas generation, a duct structure for gas transport, and an exhaust port for safe discharge. This segmentation allows each component to perform its specific function efficiently while maintaining overall system simplicity. The modular approach reduces complexity compared to a monolithic design by allowing independent optimization of each segment.
3Reliability
If check valves are installed in ducts to prevent gas flow between enclosures, then fire safety is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The check valve in the duct system performs self-service by automatically preventing backflow of flammable gases from one enclosure to another without requiring external control mechanisms. The valve's one-way flow characteristic inherently blocks reverse flow, providing passive fire safety protection. This self-regulating mechanism improves fire safety while minimizing the need for complex control systems or additional manufacturing steps.
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
Enables multi-layer stacking, increasing installation density and reducing fire spread risk, minimizing explosion hazards, and lowering initial investment costs.
Implementation Method 1
when the flammable gas is generated in the first enclosure and pressure inside the first enclosure increases to a value greater than or equal to a threshold pressure
Implementation Method 2
a deflagration panel which is disposed on the first enclosure and which is configured to rupture to allow flammable gas generated within the first enclosure to be discharged upward from the first enclosure
Implementation Method 3
The check valve may block a second flammable gas flowing in from the second duct from flowing into the first enclosure
Data Source
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AI summary
The present disclosure relates to a battery box having a structure that provides fire safety and enables multi-layer stacking. The battery box according to the present disclosure includes a first enclosure configured to accommodate a plurality of battery modules therein, a deflagration panel configured to rupture to allow flammable to be discharged from the first enclosure, when the flammable gas is generated in the first enclosure and pressure inside the first enclosure increases to a value greater than or equal to a threshold pressure, a first duct which has a lower end connected to the deflagration panel and an upper end connected to an exhaust port spaced a distance apart from the battery box and which guides the flammable gas discharged from the deflagration panel to the exhaust port, and a stacking support positioned on the first enclosure and configured to support a second enclosure stacked on the first enclosure.